IEC 61975:2010/AMD1:2016

IEC 61975 ®
Edition 1.0 2016-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AM ENDMENT 1
AM ENDEMENT 1
High-voltage direct current (HVDC) installations – System tests

Installations en courant continu à haute tension (CCHT) – Essais systèmes

IEC 61975:2010-07/AMD1:2016-09(en-fr)

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IEC 61975 ®
Edition 1.0 2016-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AM ENDMENT 1
AM ENDEMENT 1
High-voltage direct current (HVDC) installations – System tests

Installations en courant continu à haute tension (CCHT) – Essais systèmes

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.130.10; 31.080.01 ISBN 978-2-8322-3610-9

– 2 – IEC 61975:2010/AMD1:2016
© IEC 2016
FOREWORD
This amendment has been prepared by subcommittee 22F: Power electronics for electrical
transmission and distribution systems, of IEC technical committee 22: Power electronic
systems and equipment.
The text of this amendment is based on the following documents:
CDV Report on voting
22F/375/CDV 22F/394A/RVC
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the stability date indicated on the IEC website under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
_____________
General:
Replace throughout the text the abbreviations "a.c" and "d.c" by the abbreviations "AC" and
"DC" respectively.
Introduction
Delete listing using a) to l).
Replace, in c), the word "Definitions" by the words "Terms and definitions"
Replace, in d), the word "General" by the words "Objectives of system tests".
Delete, in h), the word "Power".
Replace, in the first line of the last paragraph, the word "objects" by the word "objectives".
1 Scope
Add, in the first sentence of the second paragraph, the word "monopolar" after the word
"bidirectional"
Delete, in the third paragraph, the word "some".

© IEC 2016
2 Normative references
Replace, in the last sentence of the first paragraph, the word "updated" by the word "undated".
3. Terms and definitions
3.1.1
station test
Replace the existing term and definition by the following new term and definition:
3.1.1
converter station tests
converter station system test including items which verify the function of individual equipment
of the converter station in energized state
Add, after 3.1.3, the following new terms and definitions:
3.1.4
on-site tests
tests which are performed at the final construction site consisting of converter station test and
transmission test
3.2 Operation state terms
Replace the first sentence by the following note:
NOTE There are five defined states in the HVDC system: earthed, stopped, standby, blocked, de-blocked.
3.2.3
standby
Replace, in the definition, "DC" by "HVDC".
Add, after the last sentence of the note, the following new sentence:
The standby state is also referred to as "Ready for energization".
3.2.4
blocked
Replace the second sentence of the note by the following new sentence:
The valve cooling system is in operation, and the cooling water conductivity, flow rate and water temperature are
within the specified limits.
Add, at the end of the note, the following new sentence:
The blocked state is also referred to as "Ready for operation".
3.2.6
off-site tests
Add, after the definition, the following new note:
EXAMPLE Routine and type tests performed at the suppliers’ factory.

– 4 – IEC 61975:2010/AMD1:2016
© IEC 2016
4 General
Replace the existing title by the following new title:
4 Objectives of system tests
4.1 Purpose
Replace the existing title by the following new title:
4.1 Categories of system tests
Replace, in the fourth paragraph, the word "test" by the word "testing".
Add, at the beginning of the second paragraph after Figure 1, the following new sentence:
Acceptance tests are the acceptance requirements for a successful completion of works and a
basis for the final acceptance of the HVDC system by its users.
4.2 Structure of the HVDC system
Replace, in the second sentence of the first paragraph, the word "converters" by the words
"converter units".
Add, before the last sentence of the first paragraph, the following new sentences:
Two terminals in connection constitute a HVDC system. If the configuration comprises a
single pole, it is defined as a monopolar HVDC system. If the configuration comprises two
poles of opposite polarities with respect to earth, it is called a bipolar HVDC system.
Replace Figure 2 by the following new figure:

© IEC 2016
Converter Converter
DC line/cable/bus
terminal terminal
Pole
Bipole
Pole
IEC
Figure 2 – Structure of the HVDC system
4.4 Logical steps of system test
Replace the existing text by the following new text:
To ensure proper functioning, the type test and functional performance test shall be
conducted in factory in order to debug and test the control system before the site test.
In order to provide the power grid data and help to compile the system test plan, the off-line
digital simulation shall be conducted before and during the simulation test, especially analysis
on the power flow, stability and overvoltage.
Considering the complexity of the HVDC system, all limiting design cases may be conducted
on the digital simulator in a similar way to those done on site.
Commissioning an HVDC system may affect more than the actual contract parties. The
complexity and the diversified areas concerned during system testing require thorough
planning and scheduling, cooperation of all involved parties and complete and structured
documentation. Before a system test can begin on site, the following preconditions shall be
fulfilled concerning subsystem tests, operator training and safety instructions, system test
plan and test procedures, and all necessary test equipment.
a) All subsystems shall have been tested and commissioned, including AC filters and the
converter transformers.
b) Operating personnel shall be sufficiently trained.

– 6 – IEC 61975:2010/AMD1:2016
© IEC 2016
c) Operating instructions for the station shall be available.
d) Personnel, plant safety and security instructions shall be available.
e) System test plan and documentation (Part 8) shall be available and agreed upon.
f) AC/DC power profiles shall have been agreed for each test.
g) Any AC/DC system operating restrictions shall have been identified.
h) Operator voice communications shall be available
i) All necessary test equipment shall have been calibrated and in service.
j) Procedures for the preparation and evaluation of test results shall have been agreed upon.
Site system tests shall follow the structure of the HVDC system, starting from the smallest,
least complex operational unit, usually a 12-pulse converter, and shall end with the total
system in operation. The test sequence shall be scheduled starting at the local level with
simple tests before involving additional locations and the transmission system and more
complex tests.
After all preconditions are fulfilled, converter station tests shall be conducted and begin from
the converter unit test, including the energization of AC filter and DC yard, changing the DC
system configuration, electromagnetic interference, trip test, open line test, etc.
The power transmission (also called end-to-end) test shall start on a monopolar basis,
continuing with bipolar operation, with full power transmission being the final step.
Having the complete system running properly, performance of the steady state can be verified.
With normal operating ramp settings and automatic switching sequences in place, the effect of
a number of disturbances on the DC side of the system as well as in the AC systems may be
checked, and the transient and fault recovery performances may be verified.
Acceptance tests shall be defined between supplier and user in advance and may be
performed at an appropriate time during the test schedule.
Correct operation of the HVDC system over an extended period of time is checked during the
trial operation.
Complete and organized documentation of the system tests, which benefit both the supplier
and the user, shall form part of the project documentation and contain all necessary data
records, logs, etc, and if necessary a commentary and references.
After all the above HVDC system tests have been completed, all functions have been verified
and the HVDC system can be handed over to the users.
4.5 Structure of system test
Replace the existing sentence by the following new sentence:
The overall structure of the system tests is shown in Figure 4.
4.6 Precondition for site test
Replace the existing title by the following new title:
4.6 Precondition for on-site test
4.6.1 Factory system test
Replace, in the first paragraph, the words "site tests" by the words "the off-site tests" and the
words "commissioning" by the words "partial commissioning".

© IEC 2016
Add, at the end of the fifth paragraph, the following new sentence:
Off-line simulation software can be used to analyse short circuit capacity, overvoltage and
power flow, while the real-time simulator may be used for the complete functional
performance tests of the control system.
Replace, in the first sentence of the sixth paragraph, the words "complete control system" by
the words "complete control and protection system".
4.6.2 Additional simulation test before site system test
Delete, in the existing title, the words "before site system test".
Replace the existing first paragraph by the following new paragraph:
If the AC network conditions in commissioning stage are different from that in the HVDC
design stage, the additional simulation test shall be conducted, if specified by the user.
Delete the second paragraph.
Add, after 4.6.2, the following new subclause:
4.7 Acceptance tests
The acceptance tests necessary to verify whether acceptance criteria have been met may
have been performed wholly or in part during the commissioning period. To avoid
unnecessary duplication of such tests, careful consideration shall be given in advance as to
when acceptance tests are carried out. If acceptance tests are still outstanding or have to be
repeated due to modifications, they shall be performed during the transmission test, or
following trial operation, if appropriate.
5.1.2.1 General
Replace, in the second paragraph, the words "divided into low voltage energizing" by the
words "divided into trip tests, low voltage energization".
5.1.2.2 Low voltage energizing / Phasing verification
Replace the existing title by the following new title:
5.1.2.2 Low voltage energization/Phasing verification
5.1.2.3 High voltage energizing
Replace, in the title, the word "energizing" by the word "energization"
5.1.3 General precondition
Add, in the first paragraph, the word "station" after the word "converter".
Add, in the last paragraph, the word "station" after the word "converter" and replace the words
"should" by the words "shall".
5.2.1 Purpose of test
Replace the existing text by the following new text:

– 8 – IEC 61975:2010/AMD1:2016
© IEC 2016
The test verifies that at the first energization of the converter unit the insulation withstand
voltage is achieved, and that the electrical phasing is correct.
5.2.2 Test precondition
Replace, in item a) of the list, the word "energizing" by the word "energization".
5.2.3.1 Low voltage energizing
Replace, in the title, the word "energizing" by the word "energization".
5.2.3.2 High voltage energizing
Replace, in the title, the word "energizing" by the word "energization".
5.2.3.3 Test acceptance criteria
Replace the existing subclause number by the following new subclause number:
5.2.4 Test acceptance criteria
Replace, in item c) of the list, the word "should" by the word "shall".
5.3 Energizing of reactive components
Replace, in the title, the word "energizing" by the word "energization".
5.3.1 Individual energizing of reactive components
Replace the existing title by the following new title:
5.3.1 General
5.3.3 Test precondition
Replace, at the end of item a) of the list, the word "energizing" by the word "energization".
5.4.1 General
Add, in the first sentence, the word "unit" after the word "converter".
5.4.2 Purpose of test
Replace the existing text by the following new text:
The test verifies that the different DC system configuration available can be safely changed
as specified prior to transmitting power for the first time.
5.5.1 General
Replace the existing title by the following new title:
5.5.1 Purpose of test
Add, after the existing sentence, the following new sentence:
The test verifies that there are no issues with electromagnetic compatibility of the equipment
cubicles.
© IEC 2016
5.6.4.2 DC protection trip test
Replace, in the existing sentence, the word "should" by the word "shall".
5.7.1 General
Replace the existing title by the following new title:
5.7.1 Purpose of test
5.7.1.1 Necessity of the test
Delete the title of 5.7.1.1.
Add, after the existing paragraph, the following new paragraph:
The test verifies condition and stable energization of the DC yard and DC transmission circuit.
It can excellently demonstrate the condition of the HVDC lines and cables. The tests shall be
performed sequentially. Open line test of the DC switch yard shall be the first.
Add, after the above new paragraph, the existing paragraph of 5.7.1.2 and the first sentence
of 5.7.1.3.
5.7.1.2 Open line test of the DC switchyard
Delete the title of 5.7.1.2.
5.7.1.3 Open line test with the DC transmission circuit
Delete the title of 5.7.1.3 and the last sentence of the existing paragraph.
5.7.3.2 Open line test with the DC transmission circuit
Replace the existing items c), d), e) and f) of the list by the following new items:
c) Keep the DC transmission circuit energized for a maximum of 30 min.
d) During the test, AC and DC voltage and current shall be recorded. Inspect the equipment
during the test for abnormal sounds, corona discharge or partial discharge arcing.
e) After the successful completion of the test, decrease the DC voltage to zero and block the
converter.
f) Repeat the test for each line or cable and each pole, if applicable.
5.7.4.1 Open line test of the DC switchyard
Make the last sentence "The designed DC voltage can be achieved." into a new item c) of the
list.
5.8.1 General
Replace, in the third sentence of the first paragraph, the word "converter" by the words "pole
terminal".
Replace, in the fifth sentence of the first paragraph, the word "should" by the word "shall"
6.1.1.1 General features
Add, after the last paragraph, the following note:

– 10 – IEC 61975:2010/AMD1:2016
© IEC 2016
NOTE The low power transmission tests are also referred to as "Basic operation tests".
6.1.1.2 General precondition
Replace the existing list a) to i) by the following new list:
a) Off-site tests shall have been completed.
b) Converter station tests for each station shall have been completed.
c) Where applicable, a back-to-back test or short circuit test shall have been completed.
d) Open line test with the HVDC transmission circuit shall have been completed if applicable.
e) Earth electrodes and earth electrode lines shall have been checked and cleared.
f) Inter-station telecommunication system and telephone system shall be in service.
g) The overall test procedures, safety rules, dispatch co-ordination and test responsibilities
shall have been established.
h) Fire protection and detection systems shall have been checked and in service.
i) All control protection, metering, sequence of events and fault recording systems shall
have been checked and in service.
Figure 5 – Sequence for low power transmission tests
Replace the existing Figure 5 by the following new figure:

© IEC 2016
Normal operation
(synchronous/islanded
operation)
Contingency operation
(eg. without telecom)
Emergency
(project specific)
Control location: Local/Remote
Preselection Control mode: Automatic/ Manual/Discrete
Control level: System/Station/Pole
Joint/Bipole/Separate
Monopolar Monopolar Parallel
Bipolar
earth return metallic return or series
configuration
converter
Pole 1 Pole 1 Pole 1
Pole2 Pole 2
Start/Stop Start/Stop Start/Stop Start/Stop
Steady state Steady state Steady state Steady state
operation at operation at operation at operation at
minimum minimum minimum minimum
power/current power/current power/current power/current
Trip/block Trip/block Trip/block Trip/block
sequences sequences sequences sequences
Power/current Power/current Power/current Power/current
ramping ramping ramping ramping
Reduced voltage Reduced voltage Reduced voltage Reduced voltage
operation operation operation operation

IEC
Figure 5 – Sequence for low power transmission tests
6.1.2.1 General
Replace the second existing paragraph by the following new paragraph:
The start and stop sequences of HVDC systems may vary with the design philosophies and
the system requirements. The manufacturers’ operating instructions shall always be consulted
for the specific operating sequences.
6.1.2.3 Test precondition
Replace the existing, list a) to j) by the following new list:

– 12 – IEC 61975:2010/AMD1:2016
© IEC 2016
a) All applicable converter station tests shall have been completed.
b) Start and stop sequences of the control system shall have been tested and recorded in the
off-site tests and in the on-site subsystem testing.
c) Appropriate AC and DC filters shall be available.
d) The valve cooling equipment shall have been verified and in operation.
e) No alarm affecting the performance of test shall be present.
f) Thyristor monitoring shall show that thyristor redundancy is not exceeded.
g) Protective blocking and tripping sequences shall have been tested off voltage. All
protective lockouts shall have been reset.
h) Operator's instructions and test procedures shall be available.
i) The connected AC systems shall be capable of delivering or accepting the transmitted
power without affecting their stable operation.
6.1.2.4 Test procedure
Replace the existing item a) of the list by the following new item:
a) One of the AC and DC system configurations shall be established off voltage before the
start and stop test.
Replace, in the second sentence of item b), the word "should" by the word "shall".
Replace, in item i) of the list, the word "should" by word "shall".
Replace in item m) the word "should" by word "shall".
6.1.3.1 General
Add, in item c) of the list, the word "of" after the word "retarding".
6.1.3.4 Test procedure
Delete the second paragraph.
Replace the existing third paragraph by the following new paragraph:
Trips shall be simulated at minimum power in all applicable system configurations and with
the telecommunication system in and out of service.
Replace, in the second dashed item of the fourth paragraph, the word "alarm" by the word
"alarms".
Replace, in the first sentence of the fifth paragraph, the word "should" by the word "shall".
6.2.1.2 General precondition
Replace, in the list of the existing paragraph, the word "should" by the word "shall".
6.2.2.3 Test precondition
Replace the existing list a) to c) by the following new list:
a) The control location transfer tests shall have been exercised during off-site testing.
b) The basic operation tests shall have been completed.
c) Telecommunication system shall be in service.

© IEC 2016
6.2.3.3 Test precondition
Replace the existing list a) to c) by the following new list:
a) The power control mode transfer tests shall have been exercised during off-site testing.
b) The basic operation tests shall have been completed.
c) Telecommunication system shall be in service.
6.2.4.1 General
Replace the last paragraph by the following new paragraph:
The reactive power control mode transfer tests shall begin at low power level, and be
performed at different power levels as well as at each station independently. Moreover, in the
process, the tests shall not be limited by the absolute minimal and minimal AC filter control
functions.
6.2.4.2 Purpose of test
Add, at the end of the paragraph, the following new sentence:
The test shall be repeated at higher transmission power levels as well as performed with DC
power in both power control mode and current control mode.
6.2.4.3 Test precondition
Replace the existing list a) to f) by the following new list:
a) The reactive power control mode transfer shall have been exercised off site.
b) The basic operation tests shall have been completed.
c) The setting and parameters of the reactive power control mode shall have been verified
during off- site testing.
d) The control location transfer test shall have been completed.
e) Pole current, pole power and bipolar power control mode transfer tests shall have been
completed.
f) Telecommunication system shall be in service.
6.2.5.1 General
Replace the existing paragraph by the following new paragraph:
During adverse weather conditions or conditions of excessive contamination, manual or
automatic reduction of the DC voltage may be required to reduce stresses on cables/lines or
to minimize the possibility of flashover at overhead DC lines.
6.2.5.2 Purpose of test
Add, at the end of the existing paragraph, the following new sentence:
Reduced voltage operation shall be tested in all AC and DC system configurations.
6.2.5.3 Test precondition
Replace the existing list a) to c) by the following new list:
a) Reduced voltage operation shall have been exercised during off-site testing.

– 14 – IEC 61975:2010/AMD1:2016
© IEC 2016
b) The basic operation tests shall have been completed.
c) The telecommunication shall be in service.
6.2.5.4 Test procedure
Delete the second sentence.
6.2.6.1 General
Add, in the first paragraph, the article "a" in front of the words "specific period".
6.2.6.3 Test precondition
Replace, in items a) to d) of the list, the word "should" by the word "shall".
6.2.6.4 Test procedure
Replace, in item a) of the list, the word "pole" by the word "poles".
6.3.1.1 General features
Replace, in the second paragraph, the word "should" by the word "shall".
Replace the existing third paragraph by the following new paragraph:
Back-to-back stations need no change of DC configuration.
6.3.1.2 Purpose of test
Delete the word "and" from the first line of the text as follows:
Verify coordinated switching between converter terminals for DC bus reconfiguration and thus
prevent switching from conditions which can cause severe stresses on the DC equipment.
6.3.4.1 Transfer type
Replace the existing list a) to b) by the following new list:
a) transfer to monopolar earth return;
b) transfer to monopolar metallic return.
6.4.1.1 General features
Replace the existing first paragraph by the following new paragraph:
The main circuit equipment switching tests verify the transient behaviour of the AC and HVDC
systems during and after switching. Previous tests, including converter station tests and basic
operation tests, have verified the correct functions of the DC equipment.
6.4.1.2.2
Replace the existing paragraph by the following new paragraph:
Converter station tests of both terminals including converter unit tests shall have been
completed.
© IEC 2016
6.4.1.2.6
Replace the first existing sentence by the following new sentence:
"The connected AC systems shall be within their specified limits, and can deliver or accept the
active and reactive power for the HVDC system required for the particular test."
6.4.3.4 Test procedure
Replace the first two existing paragraphs by the following new paragraphs:
The switching test shall be performed for each AC filter bank normally in monopolar operation.
In some systems where redundant AC filters are available, this test can be performed in
bipolar operation.
The tests shall be performed at both the rectifier and inverter stations.
6.5.1.1 General features
Replace, in the first paragraph, the word "should" by the word "shall".
Replace the first sentence of the last paragraph by the following new sentence:
It is recognized that dynamic performance verification is made through detailed simulation
studies and that the site test can only be taken as indicative for a particular scenario.
6.5.2.1 General
Replace the last sentence of the fourth paragraph by the following new sentence:
Thus the tests described under this clause are the most common control loops.
Replace, in the fifth paragraph, the word "should" by the word "shall".
6.5.4.2 Purpose of test
Replace, in item b) of the list, the word "should" by the word "shall" and remove capitalization
in the word "Verify".
6.5.4.4.3
Replace the existing paragraph by the following new paragraph:
In the case of long distance transmission and series connected converter units per pole, the
tests shall be performed for all converter units in operation and, if permitted by the plant
design, also with reduced numbers of converter units.
6.5.4.4.4
Replace the first sentence by the following new sentence:
The following signals shall be monitored during the tests:
6.5.4.5 Test acceptance criteria
Replace the second sentence of item c) of the list by the following sentence:

– 16 – IEC 61975:2010/AMD1:2016
© IEC 2016
The designed sequence of tripping the converter shall be correct, and no DC or AC system
components shall be affected.
6.5.5.4 Test procedure
Replace, in the second paragraph, the word "should" by the word "shall".
Replace the first sentence of the third paragraph by the following sentence:
Testing of the control behavior during disturbances shall be planned very carefully.
6.6.1.1 AC network faults
Replace, in the first paragraph, the word "should" by the word "shall".
Replace the existing second paragraph by the following new paragraph:
The staged fault tests, which can verify the AC and DC system protection during on-site
testing, may require the arrangement of particular system conditions which may expose the
affected equipment to high stress and affect equipment life time.
6.6.1.4.2 AC system configuration
Replace, in the second sentence, the word "should" by the word "shall".
6.7.1.1.1 Signals type
Delete, in the existing sentence, the words "As indicated in IEC 60919-1,".
6.7.1.3 Test precondition
Replace the existing list a) to f) by the following new list:
a) The proper operation of the telecommunication system shall have been tested during
subsystems tests at site.
b) The function of the control loops and protection circuits shall have been tested with and
without telecommunication.
c) The ability of the system to shutdown safely without telecommunication shall have been
tested.
d) The topology of the link, the amount of power transmitted and the sequence of operation
existing when the loss of telecommunication occurs shall be determined depending on the
object of each individual test.
e) During steady state operation and ramping of power/current order, the HVDC system shall
have transmitted power at a significant level and operated under the appropriate control
mode.
f) During start-up and shut-down sequences, the detailed test procedure shall have been
established depending on the specific control strategy.
6.8.1.1 General
Replace the existing title by the following new title:
6.8.1.1 General purpose
Replace, in the existing paragraph, the second sentence by the following new sentence:

© IEC 2016
Previous commissioning tests, including converter station tests and low power transmission
tests, shall have verified the correct behavior and operation of the DC equipment at low power.
6.8.2.3 Test precondition
Replace the existing text by the following new text:
Commissioning tests of reactive power control system shall have been completed, and AC
network conditions shall comply with the specified conditions.
6.8.2.4 Test procedure
Replace the first existing sentence by the following new sentence:
Measure various operation parameters when the HVDC system operates in different status,
including:
6.8.3.1 General
Add, at the end of the text, the words "in conjunction with earlier performed tests."
6.8.3.3 Test precondition
Replace, in items a) to h) of the list, the word "should" by the word "shall".
6.8.4.3 Test precondition
Replace, in items a) to h) of the list, the word "should" by the word "shall".
6.9 Acceptance tests
Replace the existing title by the following new title:
6.9 Final acceptance tests
6.9.2.1 General
Replace, in the last paragraph, the word "should" by the word "shall".
6.9.2.3 Test precondition
Replace, in items a) to h) of the list, the word "should" by the word "shall".
6.9.2.4 Test procedure
Replace, in the first paragraph, the word "should" by the word "shall".
Replace, in point l) of the list, the word "should" by word "shall".
Replace, in item l) 2) of the list, the word "sata" by the word "data".
Replace, in the last paragraph, the word "should" by the word "shall".
7.3 Test precondition
Replace, in items a) to f) of the list, the word "should" by word "shall".

– 18 – IEC 61975:2010/AMD1:2016
© IEC 2016
8.1 General
Delete, in the first sentence, the words "including the system test plan".
8.4 Inspection and test plan
Insert, at the beginning of the first sentence, the article "The".
Replace, in the third paragraph, the word "should" by the word "shall".
Replace, in item a) of the list, the word "object" by the word "objective".
Replace, in the second sentence of the fourth paragraph, the word "should" by the word
"shall".
Replace, in the sixth paragraph, the word "should" by the word "shall".
8.7 Documentation of system test results
Replace the existing text by the following text:
8.7.1 Commissioning report
The documentation of system test results shall be formed from a commissioning report
describing the results of each test series, together with the test results, data acquisition
traces and data captured by station recorders, sequence of event recorders printout, alarm
printout and other special results.
8.7.2 Failure report
A failed test shall be recorded in a failure report which shall have the test number description
and the reason for failure noted. Upon correction of the problem the manufacturer shall briefly
describe the modification on the same failure report and indicate that the system is ready for a
retest of the failed test. All modifications shall be formally tracked according to the applicable
quality assurance procedures in all applicable parts of the documentation.
8.7.3 Deviation report
The deviation report shall form part of the commissioning report with a detailed description of
modifications and reference to the specific tests and test results.
A detailed description of the modification shall be provided in the deviation report. For
tracking the status of failed tests a database shall be kept, indicating the status (new,
modification implemented, retested, passed, failed again) of each test.
A record of equipment outages malfunctions and diagnostic test results related to the
commissioning shall be kept.
A discussion of the modifications carried out shall be included for further reference.
Any special occurrence on the results of any test shall be highlighted by the test team prior to
submitting the commissioning report.
All system test results shall be well indexed and referenced to the individual tests.

© IEC 2016
8.8 Deviation report
Delete the existing title and paragraph.

___________
– 20 – IEC 61975:2010/AMD1:2016
© IEC 2016
AVANT-PROPOS
Le présent amendement a été établi par le sous-comité 22F: Électronique de puissance pour
les réseaux électriques de transport et de distribution, du comité d’études 22 de l’IEC:
Systèmes et équipements électroniques de puissance.
Le texte de cet amendement est issu des documents suivants:
CDV Rapport de vote
22F/375/CDV 22F/394A/RVC
Le rapport de vote indiqué dans le tableau ci-dessus donne toute information sur le vote ayant
abouti à l'approbation de cet amendement.
Le comité a décidé que le contenu de cet amendement et de la publication de base ne sera
pas modifié avant la date de stabilité indiquée sur le site web de l'IEC sous
"http://webstore.iec.ch" dans les données relatives à la publication recherchée. A cette date,
la publication sera
• reconduite,
• supprimée,
• remplacée par une édition révisée, ou
• amendée.
_____________
Généralités:
Cette modification s'applique au texte anglais uniquement.
Introduction
Dans l’énumération, supprimer la présentation "liste à numéros" a) à l).
Remplacer, dans c), le mot "Définitions" par les mots "Termes et définitions".
Remplacer, dans d), le mot "Généralités" par les mots "Objectifs des essais systèmes".
Supprimer, dans h), les mots "d'énergie".
Remplacer, dans la première ligne du dernier alinéa, le mot "objets" par le mot "objectifs".
1 Domaine d’application
Ajouter, dans la première phrase du second alinéa, le mot "monopolaires" après le mot
"bidirectionnelles"
Remplacer, dans le troisième alinéa, le mot "certains" par le mot "des".

© IEC 2016
2 Références normatives
Cette modification s'applique au texte anglais uniquement.
3.1.1
essai de poste
Remplacer le terme existant par le nouveau terme suivant:
3.1.1
essais du poste de conversion
La correction de la définition s'applique au texte anglais uniquement.
Ajouter, après 3.1.3, le nouveau terme suivant:
3.1.4
essais sur site
essais réalisés sur le site de construction finale, comprenant l’essai du poste de conversion et
l’essai de transmission
3.2 Termes afférents à l’état de fonctionnement
Remplacer la première phrase par la note suivante:
NOTE Dans le système CCHT, il existe cinq états définis: mis à la terre, arrêté, en veille, bloqué, débloqué.
3.2.3
en veille
Remplacer, dans la définition, "à courant continu" par "CCHT".
Ajouter, après la dernière phrase de la note, la nouvelle phrase suivante:
L'état en veille est également désigné "Prêt pour la mise sous tension".
3.2.4
bloqué
Remplacer la deuxième phrase de la note par la nouvelle phrase suivante:
Le système de refroidissement de valves fonctionne, et la conductivité, le débit et la température de l’eau de
refroidissement se situent dans les limites spécifiées.
Ajouter à la fin de la Note, la nouvelle phrase suivante:
L'état bloqué est également désigné "Prêt à fonctionner".
3.2.6
essais hors site
Ajouter, après la définition, la nouvelle note suivante:
EXEMPLE Les essais individuels de série et les essais de type réalisés dans l’usine du fabricant.
4 Généralités
Remplacer le titre existant par le nouveau titre suivant:

– 22 – IEC 61975:2010/AMD1:2016
© IEC 2016
4 Objectifs des essais systèmes
4.1 Objectif
Remplacer le titre existant par le nouveau titre suivant:
4.1 Catégories des essais systèmes
Remplacer, dans le quatrième alinéa, les mots "de l'essai" par les mots "des essais".
Ajouter, au début du deuxième alinéa suivant la Figure 1, la nouvelle phrase suivante:
Les essais d’acceptation permettent de vérifier que les installations réalisées satisfont
pleinement aux exigences spécifiées et constituent pour les utilisateurs la base de
l’acceptation finale du système CCHT.
4.2 Structure du système CCHT
Remplacer, dans la seconde phrase du premier alinéa, les mots "un ou plusieurs
convertisseurs reliés" par les mots "une ou plusieurs unités de conversion reliées".
Ajouter, avant la dernière phrase du premier alinéa, les nouvelles phrases suivantes:
Deux bornes en contact constituent un système CCHT. Si la configuration comprend un seul
pôle, elle est définie comme un système CCHT monopolaire. Si la configuration comprend
deux pôles, de polarités opposées par rapport à la terre, elle est appelée système CCHT
bipolaire.
Remplacer la Figure 2 par la nouvelle figure suivante:

© IEC 2016
Borne de Borne de
Ligne/câble/bus à
convertisseur convertisseur
courant continu
Pôle
Bipôle
Pôle
IEC
Figure 2 – Structure du système CCHT
4.4 Étapes logiques d’un essai système
Remplacer le texte existant par le nouveau texte suivant:
Afin de garantir le bon fonctionnement, il faut effectuer un essai de type et un essai de
performance fonctionnelle en usine de façon à déboguer et à soumettre le système de
commande aux essais avant l’essai sur site.
Afin de fournir les données du réseau d’énergie électrique et de faciliter la compilation du
plan d’essai système, la simulation numérique à l’arrêt doit être effectuée avant et pendant
l’essai de simulation, et plus particulièrement l’analyse du flux d’énergie, de la stabilité et de
la surtension.
En raison de la complexité du système CCHT, tous les cas de conception limite peuvent être
étudiés sur le simulateur numérique d'une manière similaire à ceux réalisés sur site.
La mise en service d’un système CCHT peu
...