Differential protection verification system for large-length submarine cable in no-load state
A differential protection, submarine cable technology, applied in the control system, emergency protection circuit device, measurement of electricity and other directions, can solve the problem of difficult to achieve high-voltage cable differential protection verification, burn out generator, generator shock and other problems, achieve Simple structure, long service life and high reliability
Pending Publication Date: 2021-05-25
CHINA ENERGY ENG EASTERN ELECTRIC POWER TESTING RES INST CO LTD +1
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Problems solved by technology
[0002] At present, it is difficult for the high-voltage cable differential protection verification system in the no-load state to realize the high-voltage cable differential protection verification; and the power consumption of the high-voltage cable differential protection verification system is relatively large. When the dynamic protection verification system fails and the power is suddenly cut off, the suddenly disconnected electric energy may have a huge impact on the generator that provides power for the high-voltage cable differential protection verification system, and even burn out the generator in severe cases
Method used
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Embodiment 1
[0030] Embodiment 1: A differential protection verification system for long-length submarine cables under no-load conditions, see Figure 1-Figure 3 shown. Including controller w4, voice prompter w20, communication module w21, demagnetization switch device w19, high-voltage cable differential protection verification system body w18 and generator w17 that provides power for the high-voltage cable differential protection verification system body;
[0031] The main body of the high-voltage cable differential protection verification system includes the starting and standby transformer circuit, and the starting and standby transformer circuit includes 220KV bus, 220KV power cable differential protection CT1, 220KV power cable, 220KV power cable differential protection CT2, A starting and standby transformer, 220KV power Cable differential protection CT3 and B start-up transformer; one end of 220KV power cable differential protection CT1 is connected to 220KV busbar, the other end of ...
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The invention discloses a differential protection verification system for a large-length submarine cable in a no-load state, and belongs to the technical field of high-voltage cable differential protection verification. The system can automatically perform de-excitation operation on a generator when a voltage-stabilizing washing pipe analysis system body has a power failure. The system comprises a controller, a field suppression switch device, a high-voltage cable differential protection verification system body and a generator for providing power supply power for the high-voltage cable differential protection verification system body, wherein the field suppression switch device comprises a first main on-off control module and a field suppression module; the input end of the first main on-off control module and the input end of the field suppression module are connected to the power output end of the generator; and the output end of the first main on-off control module is connected to a 220KV bus. The structure is simple, the safety is good, and the reliability is high.
Description
technical field [0001] The invention relates to a protection verification system, in particular to a differential protection verification system for large-length submarine cables in no-load state. Background technique [0002] At present, it is difficult for the high-voltage cable differential protection verification system in the no-load state to realize the high-voltage cable differential protection verification; and the power consumption of the high-voltage cable differential protection verification system is relatively large. When the dynamic protection verification system fails and the power is suddenly cut off, the suddenly disconnected electric energy may have a huge impact on the generator that provides power for the high-voltage cable differential protection verification system, and even burn out the generator in severe cases. Therefore, it is very necessary to design a system that can realize the calibration of high-voltage cable differential protection under no-lo...
Claims
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Patent Timeline
Login to View More IPC IPC(8): G01R31/08G01R31/62
CPCG01R31/00H02H7/06H02P9/12
Inventor 王慧军葛广林徐志强楼国才胡继刚
Owner CHINA ENERGY ENG EASTERN ELECTRIC POWER TESTING RES INST CO LTD