CN101833055B - Method and system for testing low pressure increase of converter valve equipment - Google Patents
Method and system for testing low pressure increase of converter valve equipment Download PDFInfo
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Abstract
The invention discloses a method and a system for testing the low pressure increase of converter valve equipment. The method for testing the low pressure increase of the converter valve equipment comprises the following steps: checking the phase sequence between the line side voltage and the valve side voltage of a converter transformer to confirm whether the wiring between the line side voltage and the valve side voltage of the converter transformer is correct; checking the phase of the line side voltage of the converter transformer to confirm whether the control voltage of converter valves is correct; applying trigger pulse to all the converter valves and checking the phase relation between the line side voltage of the converter transformer and the control pulse from a DC control system to confirm whether the synchronizing voltage of the converter valves is correct; and applying trigger pulse to all the converter valves, adjusting the angle of the pulse, recording the waveforms of both the trigger pulse and the synchronizing voltage with an oscillometer and checking the corresponding relation between the trigger angle and the trigger pulse of the arms of the converter valves to confirm whether the wiring between the DC control protection system and the converter valves is correct and trigger sequence on the valve side is correct. The embodiment of the invention is applied to test the low pressure increase of the converter valve equipment.
Description
Technical field
The application relates to the electric power system technical field, particularly relates to a kind of testing low pressure increase of converter valve equipment method and system.
Background technology
Direct current transportation is applied to electric system half a century, the DC transmission engineering that puts into operation has in the world at present had more than 70, compare with ac transmission, direct current transportation has that transmission capacity is large, distance, loss are low, save advantages such as taking up an area the corridor, therefore in long-distance and large-capacity power transmission, subsea cable and underground cable transmission of electricity and the asynchronous networking project of electric system, direct current transportation is used widely.Mostly the electricity that sends due to generation current factory and the TV university of user's request are to exchange; therefore the converter valve that is used for the mutual conversion of AC and DC becomes the core component of direct current transportation; the safety and reliability of converter valve is determining the safety and reliability of direct current transportation; and then determining the power supply safety and reliability; so before converter valve puts into operation, guarantee that converter valve has high security and reliability.
Have high security and reliability in order to ensure converter valve, need to carry out various tests to converter valve, testing low pressure increase is important in various tests.For guaranteeing the safety and reliability of converter valve; before the converter valve high-voltage charging; need to carry out testing low pressure increase to converter valve, with the correctness of wiring and valve side trigger sequence between wiring between confirmation converter power transformer and converter valve, converter valve control voltage, converter valve synchronizing voltage, DC control and protection system and converter valve.
Also converter valve is not carried out the method and system of testing low pressure increase in prior art.
Summary of the invention
For solving the problems of the technologies described above; the embodiment of the present application provides a kind of testing low pressure increase of converter valve equipment method; solve at present not before the converter valve high-voltage charging; converter valve is carried out the low pressure pressurization, with test method and the system of the correctness of wiring and valve side trigger sequence between wiring between confirmation converter power transformer and converter valve, converter valve control voltage, converter valve synchronizing voltage, DC control and protection system and converter valve.Technical scheme is as follows:
The embodiment of the present application provides a kind of testing low pressure increase of converter valve equipment method, comprising:
Check the phase sequence between converter power transformer voltage on line side and voltage on valve side, to confirm between converter power transformer voltage on line side and voltage on valve side, whether wiring is correct;
Check the phase place of converter power transformer voltage on line side, whether correct to confirm that converter valve is controlled voltage;
Whole converter valve are applied trigger pulse, check the converter power transformer voltage on line side and from the phase relation between the DC control system gating pulse, whether correct to confirm the converter valve synchronizing voltage;
Whole converter valve are applied trigger pulse; the angle of regulating impulse; adopt the waveform of oscillograph admission trigger pulse and synchronizing voltage; the Trigger Angle of test valve arm and the corresponding relation of trigger pulse; to confirm between DC control and protection system and converter valve, whether wiring is correct, and whether valve side trigger sequence is correct.
Preferably, described method also comprises:
In the phase sequence that checks between converter power transformer voltage on line side and voltage on valve side, before confirming between converter power transformer voltage on line side and voltage on valve side that wiring is whether correct, withdraw from DC minimum voltage protection, guarantee that DC control and protection system can move under normal operation;
Whole converter valve are being applied trigger pulse; the angle of regulating impulse; adopt the waveform of oscillograph admission trigger pulse and synchronizing voltage; the Trigger Angle of test valve arm and the corresponding relation of trigger pulse; to confirm between DC control and protection system and converter valve, whether wiring is correct; after valve side trigger sequence is whether correct, recover DC minimum voltage protection.
Preferably, the phase sequence between described inspection converter power transformer voltage on line side and voltage on valve side is to adopt phase-sequence meter to check.
Preferably, described inspection converter power transformer voltage on line side phase sequence is to adopt oscillograph to check.
The application also provides a kind of testing low pressure increase of converter valve equipment system, comprising:
Exchange the unit, be used for providing alternating voltage;
With the pulse conversion unit that exchanges the unit and be connected, be used for the alternating voltage that described interchange unit provides is converted to DC voltage, described pulse conversion unit also is provided with load.
Can find out from above-mentioned technical scheme, the embodiment of the present application is by checking the phase sequence between converter power transformer voltage on line side and voltage on valve side, to confirm between converter power transformer and converter valve, whether wiring is correct; Check the phase place of converter power transformer voltage on line side, whether correct to confirm that converter valve is controlled voltage; Check the converter power transformer voltage on line side and from the phase relation between the DC control system gating pulse, whether correct to confirm the converter valve synchronizing voltage; The Trigger Angle of test valve arm and the corresponding relation of trigger pulse are to confirm between DC control and protection system and converter valve, whether wiring is correct, whether valve side trigger sequence is correct.Use the embodiment of the present application; complete the testing low pressure increase to converter valve equipment, with the correctness of wiring and valve side trigger sequence between wiring between confirmation converter power transformer and converter valve, converter valve control voltage, converter valve synchronizing voltage, DC control and protection system and converter valve.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or description of the Prior Art, apparently, the accompanying drawing that the following describes is only some embodiment that put down in writing in the application, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the process flow diagram of the embodiment of the present application testing low pressure increase of converter valve equipment method;
Fig. 2 is the structural representation of the embodiment of the present application testing low pressure increase of converter valve equipment system.
Embodiment
At first a kind of back-to-back converter substation testing low pressure increase of converter valve equipment method of the application described, the process flow diagram of the method can be shown in Figure 1, comprising:
S11: check the phase sequence between converter power transformer voltage on line side and voltage on valve side, to confirm between converter power transformer and converter valve, whether wiring is correct;
S12: check the phase place of converter power transformer voltage on line side, whether correct to confirm that converter valve is controlled voltage;
In the embodiment of the present application, adopt oscillograph to check converter power transformer voltage on line side phase place; Adopt phase-sequence meter to check the phase sequence of converter power transformer voltage on line side and voltage on valve side, when the phase sequence of converter power transformer voltage on line side and voltage on valve side was positive phase sequence, between converter power transformer and converter valve, wiring was correct.
S13: whole converter valve are applied trigger pulse, check the converter power transformer voltage on line side and from the phase relation between the DC control system gating pulse, whether correct to confirm the converter valve synchronizing voltage;
S14: whole converter valve are applied trigger pulse, and the angle of regulating impulse adopts oscillograph to enroll the waveform of trigger pulse and synchronizing voltage,
S15: whole converter valve are applied trigger pulse, the angle of regulating impulse, the Trigger Angle of test valve arm and the corresponding relation of trigger pulse are to confirm between DC control and protection system and converter valve, whether wiring is correct; Whether correct to confirm valve side trigger sequence.
The embodiment of the present application also comprises:
S10: in the phase sequence that checks between converter power transformer voltage on line side and voltage on valve side, before confirming between converter power transformer voltage on line side and voltage on valve side that wiring is whether correct, withdraw from DC minimum voltage protection, guarantee that DC control and protection system can move under normal operation;
Adopt this step to be because magnitude of voltage and the current value that the magnitude of voltage in when test and current value are far smaller than normal operation, when magnitude of voltage and current value can cause the DC minimum voltage protection action when low.Need to withdraw from DC minimum voltage protection in order to guarantee that DC control and protection system can move under normal operation, by in DC control protection software, the input position of DC minimum voltage protection being made as " withdrawing from " to withdraw from DC minimum voltage protection.
S15: whole converter valve are being applied trigger pulse; the angle of regulating impulse; adopt the waveform of oscillograph admission trigger pulse and synchronizing voltage; the Trigger Angle of test valve arm and the corresponding relation of trigger pulse; to confirm between DC control and protection system and converter valve, whether wiring is correct; after valve side trigger sequence is whether correct, recover DC minimum voltage protection.
Can find out from above-mentioned technical scheme, the embodiment of the present application is by checking the phase sequence between converter power transformer voltage on line side and voltage on valve side, to confirm between converter power transformer and converter valve, whether wiring is correct; Check the phase place of converter power transformer voltage on line side, whether correct to confirm that converter valve is controlled voltage; Check the converter power transformer voltage on line side and from the phase relation between the DC control system gating pulse, whether correct to confirm the converter valve synchronizing voltage; The Trigger Angle of test valve arm and the corresponding relation of trigger pulse are to confirm between DC control and protection system and converter valve, whether wiring is correct, whether valve side trigger sequence is correct.Use the embodiment of the present application; complete the testing low pressure increase to converter valve equipment, with the correctness of wiring and valve side trigger sequence between wiring between confirmation converter power transformer and converter valve, converter valve control voltage, converter valve synchronizing voltage, DC control and protection system and converter valve.
The below introduces the testing low pressure increase of converter valve equipment system in detail, and the structural representation of this system as shown in Figure 2.
The embodiment of the present application testing low pressure increase of converter valve equipment system comprises the interchange unit and the pulse conversion unit connected with exchanging the unit.
Wherein: exchange the unit and be used for providing alternating voltage.Exchanging the unit is comprised of alternating-current voltage source 11, induction voltage regulator 12 and step-up transformer 13.11 1 ends of alternating-current voltage source are connected with step-up transformer 13 by induction voltage regulator 12, and the other end connects the interchange outlet line.
The alternating voltage that pulse conversion unit is used for exchanging the unit and provides is converted to DC voltage.Pulse conversion unit is comprised of converter valve 14, converter valve 15, Y-Y type converter power transformer 16 and Y-Δ type converter power transformer 17.The plus earth of converter valve 15, negative pole is connected with the positive pole of converter valve 14.Y side of Y-Y type converter power transformer 16 and Y-Δ type converter power transformer 17 links together, and is connected with the primary side of step-up transformer 13, and the primary side of this step-up transformer 13 does not connect induction voltage regulator 12.Another Y time side of Y-Y type converter power transformer 16 connects the anodal tie point that is connected with converter valve 15 negative poles of converter valve 14.The Δ of Y-Δ type converter power transformer 17 time side connects the anodal tie point that is connected with converter valve 15 negative poles of converter valve 14.
Pulse conversion unit also is provided with load, and this load is a DC load resistance 18.These DC load resistance 18 1 ends are connected with the positive pole of the converter valve 15 of ground connection, and the other end is connected with the negative pole of converter valve 14, and the negative pole of this converter valve 14 does not connect the positive pole of converter valve 15.
In the embodiment of the present application, exchange the unit and also comprise automatic coupling voltage regulator 19.Automatic coupling voltage regulator 19 primary sides connect the tie point of induction voltage regulator 12 and step-up transformer 13, and secondary side connects controller.
In the embodiment of the present application, alternating-current voltage source 11 is three-phase four-wire system alternating voltages that China generally adopts, and its magnitude of voltage is 400V.The voltage output range of induction voltage regulator 12 is 0-400V.The output voltage of step-up transformer 13 and the ratio of input voltage are 5000: 400, and namely when the input voltage of step-up transformer 13 was 400V, its output voltage was 5000V, and the output voltage of step-up transformer 13 is as supplying with the converter power transformer voltage on line side.The voltage output range of automatic coupling voltage regulator 19 is 400/0-400V.400V alternating-current voltage source 11, induction voltage regulator 12 and step-up transformer 13 are combined and are used to provide alternating voltage, to supply with converter power transformer net side, are used for simultaneously satisfying the voltage request of converter valve conducting.Automatic coupling voltage regulator 19 makes the voltage of supplying with the converter valve trigger controller satisfy the voltage request of converter valve conducting.
The pulse conversion unit that is comprised of converter valve 14, converter valve 15, Y-Y type converter power transformer 16 and Y-Δ type converter power transformer 17 is 12 pulse conversion units.The valve side winding connection of the valve side winding connection of Y-Y type converter power transformer 16 and Y-Δ type converter power transformer 17, one side is that Y connects, one is that Δ connects is in order to make secondary side voltage phase angle between Y-Y type converter power transformer 16 and Y-Δ type converter power transformer 17 differ 30 degree, to remove the 6k subharmonic in DC voltage.
In addition, converter valve 14 and converter valve 15 are in series by at least one controllable silicon valve block.During normal operation, converter power transformer primary side voltage is 500kV, and when testing low pressure increase, converter power transformer primary side making alive is 2kV approximately, much smaller than 500kV, can not make whole converter valve 15 or converter valve 16 conductings.For this reason, each converter valve only keeps a controllable silicon valve block, and all the other controllable silicon valve blocks are all by the shorting stub bypass, and every arm forms complete rectifier bridge by a controllable silicon valve block, to guarantee that converter valve can conducting.
In the embodiment of the present application, the DC current at DC load resistance 18 two ends is not less than 2A.
Use technique scheme; use native system can complete testing low pressure increase of converter valve equipment, with the correctness of wiring and valve side trigger sequence between wiring between confirmation converter power transformer and converter valve, converter valve control voltage, converter valve synchronizing voltage, DC control and protection system and converter valve.
The above is only the application's embodiment; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the application's principle; can also make some improvements and modifications, these improvements and modifications also should be considered as the application's protection domain.
Claims (4)
1. a testing low pressure increase of converter valve equipment method, is characterized in that, comprising:
Check the phase sequence between converter power transformer voltage on line side and voltage on valve side, to confirm between converter power transformer voltage on line side and voltage on valve side, whether wiring is correct;
Check the phase place of converter power transformer voltage on line side, whether correct to confirm that converter valve is controlled voltage;
Whole converter valve are applied trigger pulse, check the converter power transformer voltage on line side and from the phase relation between the DC control system gating pulse, whether correct to confirm the converter valve synchronizing voltage;
Whole converter valve are applied trigger pulse; the angle of regulating impulse; adopt the waveform of oscillograph admission trigger pulse and synchronizing voltage; the Trigger Angle of test valve arm and the corresponding relation of trigger pulse; to confirm between DC control and protection system and converter valve, whether wiring is correct, and whether valve side trigger sequence is correct.
2. method according to claim 1, is characterized in that, described method also comprises:
In the phase sequence that checks between converter power transformer voltage on line side and voltage on valve side, before confirming between converter power transformer voltage on line side and voltage on valve side that wiring is whether correct, withdraw from DC minimum voltage protection, guarantee that DC control and protection system can move under normal operation;
Whole converter valve are being applied trigger pulse; the angle of regulating impulse; adopt the waveform of oscillograph admission trigger pulse and synchronizing voltage; the Trigger Angle of test valve arm and the corresponding relation of trigger pulse; to confirm between DC control and protection system and converter valve, whether wiring is correct; after valve side trigger sequence is whether correct, recover DC minimum voltage protection.
3. method according to claim 1 and 2, is characterized in that, the phase sequence between described inspection converter power transformer voltage on line side and voltage on valve side is to adopt phase-sequence meter to check.
4. method according to claim 3, is characterized in that, described inspection converter power transformer voltage on line side phase sequence is to adopt oscillograph to check.
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| CN 201010165064 CN101833055B (en) | 2010-05-07 | 2010-05-07 | Method and system for testing low pressure increase of converter valve equipment |
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| CN 201010165064 CN101833055B (en) | 2010-05-07 | 2010-05-07 | Method and system for testing low pressure increase of converter valve equipment |
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| CN101833055B true CN101833055B (en) | 2013-05-08 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102841286B (en) * | 2012-08-07 | 2015-05-06 | 南京南瑞继保电气有限公司 | Method of judging reverse polarity of converter bridge control pulse cable |
| CN103149484B (en) * | 2013-03-01 | 2015-03-25 | 南京南瑞继保电气有限公司 | Detection method for current converter trigger control device function |
| CN107765111B (en) * | 2016-08-19 | 2021-03-02 | 全球能源互联网研究院 | Design method and system for OLT (optical line terminal) test mode of high-voltage direct-current transmission valve control system |
| CN109813995A (en) * | 2019-01-25 | 2019-05-28 | 中国南方电网有限责任公司超高压输电公司大理局 | Converter station ice melting system converter valve low pressure triggers tester |
| CN112578199A (en) * | 2020-11-18 | 2021-03-30 | 国网山西省电力公司晋城供电公司 | Integrated electrical testing device |
| CN113917251A (en) * | 2021-09-09 | 2022-01-11 | 南京南瑞继保电气有限公司 | Converter valve low-pressure pressurization test system and control method |
| CN113253013B (en) * | 2021-04-07 | 2022-08-19 | 国家电网有限公司 | Low-pressure pressurization control method for converter valve of converter station |
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| CN101201363A (en) * | 2007-12-14 | 2008-06-18 | 湖北省电力试验研究院 | Current conversion transformer induction pressure test supply apparatus and method for measurement of partial discharge thereof |
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