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Device for testing on-off performance of direct current breaker

A DC circuit breaker and characteristic testing technology, which is applied in the direction of circuit breaker testing, etc., can solve the problems that maintenance personnel do not have testing methods and tools, cannot carry out test verification, and hidden dangers in the safe operation of power systems

Active Publication Date: 2013-11-27
STATE GRID CORP OF CHINA +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the DC power supply systems of power plants and substations can basically be designed in accordance with relevant standards to ensure 2 to 4 steps. Corresponding testing methods and tools cannot be tested and verified, which leaves hidden dangers to the safe operation of the power system

Method used

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  • Device for testing on-off performance of direct current breaker
  • Device for testing on-off performance of direct current breaker

Examples

Experimental program
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Embodiment Construction

[0010] like figure 1 As shown, a DC circuit breaker on-off characteristic testing device is composed of a host management computer and a DC circuit breaker on-off characteristic test module connected through RS485 communication. The DC circuit breaker on-off characteristic test device is composed of the upper management computer and the DC circuit breaker on-off characteristic test module. The upper management computer adopts high-performance industrial computer, Windows XP operating system, keyboard, touch pad input (USB mouse can be connected), simple operation, beautiful interface, all parameters are clear at a glance; real-time display of various parameter curves and values, can store multiple groups Test data and waveforms, realize electronic archiving, report printing, record query and other functions. The upper management computer is a computer installed with the test software for the on-off characteristics of the DC circuit breaker compiled in VC language, and it cont...

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Abstract

The invention discloses a device for testing on-off performance of a direct current breaker, and relates to the technical field of direct current breaker on-off performance testing. The device is provided with an upper supervisor, and the upper supervisor is in communicating connection with a direct current breaker on-off performance testing module through RS485. The direct current breaker on-off performance testing module is composed of a data collecting unit, a controlling and adjusting unit and a test power module. The data collecting unit comprises a shunt, a storage recorder, a microprocessor, a keyboard and a display device. The controlling and adjusting unit comprises a remote control relay, a time relay, a scram button, a direct current contactor, parallel resistors R1...Rn, IGBT tubes K1...Kn and an optocoupler. The test power module comprises an AC / DC rectifying module and a super capacitor. The device has the advantages that 1-1000A large constant currents can be provided, the tripping time of the breaker under different short-circuit currents can be tested, the potential hazards that in a direct current system, the dispersion and the internal resistance of the direct current system breaker are inconsistent, and stage difference coordination is not reasonable can be timely found, and operation resistance and misoperation possibly existing in the direct current breaker are effectively avoided.

Description

technical field [0001] The invention relates to the technical field of on-off characteristics testing of DC circuit breakers, in particular to a device for testing on-off characteristics of DC circuit breakers. Background technique [0002] At present, the DC feeder circuit mostly adopts a tree structure. With the development of power enterprises, the overload protection and short circuit protection of electrical appliances have higher and higher requirements on the operating characteristics of the DC circuit breaker. In order to prevent the protection refusal or malfunction caused by the on-off characteristics of the DC circuit breaker, it is necessary to test the on-off characteristics of the DC circuit breaker, reproduce the characteristic curve of the circuit breaker, and find out in time the inconsistency of the dispersion and internal resistance of the DC circuit breaker, and the level difference coordination. Unreasonable and other hidden dangers of the DC system. At...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/327
Inventor 王浩徐敦彬李建军马建辉王浩彬袁田胡凯刘豪杰王敏单小勇
Owner STATE GRID CORP OF CHINA
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