CN109932601A - The method that the grid-connected circuit of star-like statodyne group is detected with anti-power transmission - Google Patents
The method that the grid-connected circuit of star-like statodyne group is detected with anti-power transmission Download PDFInfo
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- CN109932601A CN109932601A CN201910254437.0A CN201910254437A CN109932601A CN 109932601 A CN109932601 A CN 109932601A CN 201910254437 A CN201910254437 A CN 201910254437A CN 109932601 A CN109932601 A CN 109932601A
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Abstract
Specifically a kind of method that the grid-connected circuit of star-like statodyne group is detected with anti-power transmission of the present invention；It is characterized in that including test preparation；To the anti-power transmission of system side bus；To generator side bus and the anti-power transmission of generator；System side and the secondary nuclear phase of generator side；Synchronized detection and control loop inspection；Route restores.By adopting the above technical scheme, grid-connected nuclear phase does not need generator operation, energy conservation and environmental protection to the present invention；It does not need to operate in primary side nuclear phase, and reduces the grid switching operation number under conventional method, it is safe and efficient；It can complete whether have grid-connected conditions judgement before by electricity in power station, save the duration.
Description
Technical field
It is specifically a kind of that the grid-connected circuit of star-like statodyne group is examined with anti-power transmission the present invention relates to motor installation area
The method of survey.
Background technique
Currently, being whole in generator for the usual way of the grid-connected circuit detection of the generator using star-like stator winding
Stepping up from zero test is carried out together with generator band bus in set starting test, is risen to mutual to generator side voltage when voltage rating
The secondary voltage of sensor and system side voltage transformer carries out nuclear phase；Or with two sets of phase checking devices in grid-connection cabinet primary side three-phase
It is checked between upper and lower pile crown, indicates whether changing rule comprehensive descision has grid-connected conditions according to phasing tester
(CN201810053251.4, CN201610925759.X).The former generator operation needs to consume the energy, and needs multiple back brake behaviour
Make；The latter's generator operation is also required to the consumption energy, and can only judge whether primary system has grid-connected primary condition, Wu Fatong
When inspection judgement is carried out to synchronous meter, same period relay, the secondary detection of automatic sub-synchronous device and control loop.
Summary of the invention
It is an object of the invention to overcome drawbacks described above, a kind of efficient, energy saving, accurate, intuitive comprehensive descision hair is provided
The secondary inspection of motor side and system side primary circuit and same period relay, automatic sub-synchronous device, synchronous meter and other devices
The method whether survey and control loop have grid-connected conditions.
In order to achieve the above object, the present invention is implemented as follows:
A method of the grid-connected circuit of star-like statodyne group is detected with anti-power transmission；Including
Step 1, test prepare；
Step 1.1, confirmation generator, generator bus, generator bus side voltage transformer, system busbar, system busbar side
The primary circuits equipment such as voltage transformer, system side interconnection switch, grid-connected switch, mutual connecting cable have been installed, have been tested
Finish, meets by electric needs；
Step 1.2, confirmation it is grid-connected detection and control loop pressed schematic diagram complete wiring, generator protection relay, the same period after
Electric appliance, automatic sub-synchronous device and other grid-connected detections and control device parameter have been arranged, adjusts and finish, and signal output and protect
Movement is normal；
Grid-connected switch, system side interconnection switch, system side voltage transformer, generator side voltage transformer are placed in by step 1.3
Cold standby state；
Step 1.4, the star-like connection for disconnecting generator unit stator winding neutral point disconnect neutral point overvoltage protector, and check
Safe distance between each phase winding, between each phase winding and ground, it is ensured that meet test requirements document；
Step 2, to the anti-power transmission of system side bus；
Step 2.1 introduces positive phase sequence experiment power supply all the way from system side interconnection switch cabinet entrance, and voltage value is no more than generator
Voltage rating, and meet after system side and the conversion of generator side voltage transformer same period relay, automatic sub-synchronous device, same
Walk frequency, the voltage, phase-detection requirement of table；
System side voltage transformer is changed to operating status by step 2.2；
System side interconnection switch is changed to operating status by step 2.3；
Step 2.4, the voltage value that experiment power supply is detected in system side voltage transformer cabinet secondary side, and validation test power supply is positive
Phase sequence；
Step 3, to generator side bus and the anti-power transmission of generator；
Generator side voltage transformer is changed to operating status by step 3.1；
Grid-connected switch is changed to operating status by step 3.2；
Step 3.3 is detected in generator side voltage transformer cabinet secondary side, and voltage value is identical as system side, and is confirmed as positive
Sequence；
Step 4, system side and the secondary nuclear phase of generator side；
Measurement result should meet the relationship of the following table 1:
Voltage measurements between 1 generator side bus 1 of table and system side bus 2
Step 5, synchronized detection and control loop inspection；
It is as follows to predominantly detect confirmation content: same period screen system side and generator side voltage and frequency instruction are correct；Synchronous meter is put into,
Its instruction has synchronized, and determines that two groups of TV secondary outgoing lines are correct to synchronous meter route；Same period relay normally exports " allowing to close a floodgate "
Signal determines that same period relay voltage and control loop wiring are correct；After automatic sub-synchronous device investment is automatic, phase difference is indicated
It is 0 °, it is normal to export " allowing to close a floodgate " signal, determine that two groups of TV secondary outgoing lines are correct to automatic sub-synchronous device route.
Step 6, route restore；
Grid-connected switch is changed to cold standby state by step 6.1；
System side interconnection switch is changed to cold standby state by step 6.2；
System side voltage transformer and bus bar side voltage transformer are changed to cold standby state by step 6.3；
Step 6.4, the star-like connection for restoring motor stator winding.
Step 6.5 restores the connection of neutral point overvoltage protector.
By adopting the above technical scheme, grid-connected nuclear phase does not need generator operation, energy conservation and environmental protection to the present invention；It does not need primary
The operation of side nuclear phase, and reduce the grid switching operation number under conventional method, it is safe and efficient；Can complete whether to have before by electricity in power station
Standby grid-connected conditions judge, save the duration.Detecting state and the system condition after being really incorporated into the power networks are almost the same, and have passed through complete
The detection in face, system, when generating set is formally grid-connected, as long as detection system can issue same period signal, it is ensured that generator
Group has grid-connected conditions, if detection system on the contrary cannot issue same period signal, shows that generating set does not have grid-connected conditions.
Detailed description of the invention
Fig. 1 is a kind of wiring schematic diagram of generating set.
Specific embodiment
The present invention is further illustrated below by way of specific embodiment.
As shown in Figure 1, certain generating set, rated power 30000kW, voltage rating 10kV, wherein G is generating set, fixed
Sub- winding neutral point is shorted copper bar and is connected to ground by over-voltage protector；DL1 is grid-connected switch, and DL2 is that power station connects with outside
The interconnection switch connect；TV1 is generator side voltage transformer, and TV2 is system side voltage transformer；Same period screen capital equipment includes
Synchronous meter, same period relay, automatic sub-synchronous device.
A method of the grid-connected circuit of star-like statodyne group is detected with anti-power transmission；Including
Step 1, test prepare；
Step 1.1, confirmation generator, generator bus, generator bus side voltage transformer, system busbar, system busbar side
The primary circuits equipment such as voltage transformer, system side interconnection switch, grid-connected switch, mutual connecting cable have been installed, have been tested
Finish, meets by electric needs；
Step 1.2, confirmation it is grid-connected detection and control loop pressed schematic diagram complete wiring, generator protection relay, the same period after
Electric appliance, automatic sub-synchronous device and other grid-connected detections and control device parameter have been arranged, adjusts and finish, and signal output and protect
Movement is normal；
Grid-connected switch, system side interconnection switch, system side voltage transformer, generator side voltage transformer are placed in by step 1.3
Cold standby state；
Step 1.4, the star-like connection for disconnecting generator unit stator winding neutral point disconnect neutral point overvoltage protector, and check
Safe distance between each phase winding, between each phase winding and ground, it is ensured that meet test requirements document；
Step 2, to the anti-power transmission of system side bus；
Step 2.1 introduces positive phase sequence experiment power supply all the way from system side interconnection switch cabinet entrance, and voltage value is no more than generator
Voltage rating, and meet after system side and the conversion of generator side voltage transformer same period relay, automatic sub-synchronous device, same
Walk frequency, the voltage, phase-detection requirement of table；
System side voltage transformer is changed to operating status by step 2.2；
System side interconnection switch is changed to operating status by step 2.3；
Step 2.4, the voltage value that experiment power supply is detected in system side voltage transformer cabinet secondary side, and validation test power supply is positive
Phase sequence；
Step 3, to generator side bus and the anti-power transmission of generator；
Generator side voltage transformer is changed to operating status by step 3.1；
Grid-connected switch is changed to operating status by step 3.2；
Step 3.3 is detected in generator side voltage transformer cabinet secondary side, and voltage value is identical as system side, and is confirmed as positive
Sequence；
Step 4, system side and the secondary nuclear phase of generator side；
Measurement result should meet the relationship of the following table 1:
Voltage measurements between 1 generator side bus 1 of table and system side bus 2
Step 5, synchronized detection and control loop inspection；
It is as follows to predominantly detect confirmation content: same period screen system side and generator side voltage and frequency instruction are correct；Synchronous meter is put into,
Its instruction has synchronized, and determines that two groups of TV secondary outgoing lines are correct to synchronous meter route；Same period relay normally exports " allowing to close a floodgate "
Signal determines that same period relay voltage and control loop wiring are correct；After automatic sub-synchronous device investment is automatic, phase difference is indicated
It is 0 °, it is normal to export " allowing to close a floodgate " signal, determine that two groups of TV secondary outgoing lines are correct to automatic sub-synchronous device route.
Step 6, route restore；
Grid-connected switch is changed to cold standby state by step 6.1；
System side interconnection switch is changed to cold standby state by step 6.2；
System side voltage transformer and bus bar side voltage transformer are changed to cold standby state by step 6.3；
Step 6.4, the star-like connection for restoring motor stator winding；
Step 6.5 restores the connection of neutral point overvoltage protector.
By adopting the above technical scheme, grid-connected nuclear phase does not need generator operation, energy conservation and environmental protection to the present invention；It does not need primary
The operation of side nuclear phase, and reduce the grid switching operation number under conventional method, it is safe and efficient；Can complete whether to have before by electricity in power station
Standby grid-connected conditions judge, save the duration.Detecting state and the system condition after being really incorporated into the power networks are almost the same, and have passed through complete
The detection in face, system, when generating set is formally grid-connected, as long as detection system can issue same period signal, it is ensured that generator
Group has grid-connected conditions, if detection system on the contrary cannot issue same period signal, shows that generating set does not have grid-connected conditions.
Claims (5)
1. a kind of method detected with anti-power transmission to the grid-connected circuit of star-like statodyne group；It is characterized in that including
Step 1, test prepare；
Step 2, to the anti-power transmission of system side bus；
Step 3, to generator side bus and the anti-power transmission of generator；
Step 4, system side and the secondary nuclear phase of generator side；
Measurement result should meet the relationship of the following table 1:
Voltage measurements between 1 generator side bus 1 of table and system side bus 2
Step 5, synchronized detection and control loop inspection；
Detection confirmation content is as follows: same period screen system side and generator side voltage and frequency instruction are correct；Synchronous meter is put into, is referred to
Show and synchronized, determines that two groups of TV secondary outgoing lines are correct to synchronous meter route；Same period relay normally exports " allowing to close a floodgate " signal,
Determine that same period relay voltage and control loop wiring are correct；After automatic sub-synchronous device investment is automatic, instruction phase difference is 0 °,
Normal output " allowing to close a floodgate " signal, determines that two groups of TV secondary outgoing lines are correct to automatic sub-synchronous device route；
Step 6, route restore.
2. the method according to claim 1 detected with anti-power transmission to the grid-connected circuit of star-like statodyne group；Its feature
Be: the step 1 further includes
Step 1.1, confirmation generator, generator bus, generator bus side voltage transformer, system busbar, system busbar side
The primary circuits equipment such as voltage transformer, system side interconnection switch, grid-connected switch, mutual connecting cable have been installed, have been tested
Finish, meets by electric needs；
Step 1.2, confirmation it is grid-connected detection and control loop pressed schematic diagram complete wiring, generator protection relay, the same period after
Electric appliance, automatic sub-synchronous device and other grid-connected detections and control device parameter have been arranged, adjusts and finish, and signal output and protect
Movement is normal；
Grid-connected switch, system side interconnection switch, system side voltage transformer, generator side voltage transformer are placed in by step 1.3
Cold standby state；
Step 1.4, the star-like connection for disconnecting generator unit stator winding neutral point disconnect neutral point overvoltage protector, and check
Safe distance between each phase winding, between each phase winding and ground, it is ensured that meet test requirements document.
3. the method according to claim 1 detected with anti-power transmission to the grid-connected circuit of star-like statodyne group；Its feature
Be: the step 2 further includes
Step 2.1 introduces positive phase sequence experiment power supply all the way from system side interconnection switch cabinet entrance, and voltage value is no more than generator
Voltage rating, and meet after system side and the conversion of generator side voltage transformer same period relay, automatic sub-synchronous device, same
Walk frequency, the voltage, phase-detection requirement of table；
System side voltage transformer is changed to operating status by step 2.2；
System side interconnection switch is changed to operating status by step 2.3；
Step 2.4, the voltage value that experiment power supply is detected in system side voltage transformer cabinet secondary side, and validation test power supply is positive
Phase sequence.
4. the method according to claim 1 detected with anti-power transmission to the grid-connected circuit of star-like statodyne group；Its feature
Be: the step 3 further includes
Generator side voltage transformer is changed to operating status by step 3.1；
Grid-connected switch is changed to operating status by step 3.2；
Step 3.3 is detected in generator side voltage transformer cabinet secondary side, and voltage value is identical as system side, and is confirmed as positive
Sequence.
5. the method according to claim 1 detected with anti-power transmission to the grid-connected circuit of star-like statodyne group；Its feature
Be: the step 6 further includes
Grid-connected switch is changed to cold standby state by step 6.1；
System side interconnection switch is changed to cold standby state by step 6.2；
System side voltage transformer and bus bar side voltage transformer are changed to cold standby state by step 6.3；
Step 6.4, the star-like connection for restoring motor stator winding；
Step 6.5 restores the connection of neutral point overvoltage protector.
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Cited By (3)
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| CN112345938A (en) * | 2020-12-01 | 2021-02-09 | 中广核工程有限公司 | Test method for emergency diesel generator set of nuclear power plant |
| CN112834835A (en) * | 2019-11-22 | 2021-05-25 | 上海梅山钢铁股份有限公司 | Line sequence detection method for impact-free grid connection of generator |
| CN113162111A (en) * | 2021-03-30 | 2021-07-23 | 中国能源建设集团华中电力试验研究院有限公司 | Method and system for reducing reactive impact in power plant grid connection process |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112834835A (en) * | 2019-11-22 | 2021-05-25 | 上海梅山钢铁股份有限公司 | Line sequence detection method for impact-free grid connection of generator |
| CN112834835B (en) * | 2019-11-22 | 2022-09-06 | 上海梅山钢铁股份有限公司 | Line sequence detection method for impact-free grid connection of generator |
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| CN112345938B (en) * | 2020-12-01 | 2022-05-31 | 中广核工程有限公司 | Test method for emergency diesel generator set of nuclear power plant |
| CN113162111A (en) * | 2021-03-30 | 2021-07-23 | 中国能源建设集团华中电力试验研究院有限公司 | Method and system for reducing reactive impact in power plant grid connection process |
| CN113162111B (en) * | 2021-03-30 | 2022-05-31 | 中国能源建设集团华中电力试验研究院有限公司 | Method and system for reducing reactive impact in power plant grid connection process |
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