Same-phase power supply equipment relay protection system and method
A technology of in-phase power supply and relay protection, applied in information technology support systems, emergency protection circuit devices, electrical components, etc., to reduce damage
Inactive Publication Date: 2011-06-22
SOUTHWEST JIAOTONG UNIV +1
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Problems solved by technology
At present, there is no relay protection scheme specifically for the same-phase power supply equipment
Method used
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[0032] Such as figure 2 As shown, the relay protection system of the same-phase power supply equipment involved in the present invention is mainly composed of a microcomputer protection device, a circuit breaker 1QF and a current transformer 1TA arranged between the α bus and the same-phase power supply equipment, and a β bus and the same-phase power supply equipment. The circuit breaker 2QF and the current transformer 2TA are formed between them, and the current transformer 1TA and the current transformer 2TA are both connected to the microcomputer protection device.
[0033] Due to the adoption of the above structure, overcurrent protection can be realized. Its working process is: when a serious fault occurs inside the same-phase power supply equipment (between the current transformer 1TA and the current transformer 2TA), the microcomputer protection device passes through the current transformer 1TA. Or the current measured by the current transformer 2TA is greater than the r...
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The invention discloses a same-phase power supply equipment relay protection system. The system mainly consists of a microcomputer protection device, a breaker 1QF, a current transformer 1TA, a breaker 2QF, a current transformer 2TA, a voltage transformer 1TV and a voltage transformer 2TV, wherein the breaker 1QF and the current transformer 1TA are arranged between an alpha bus bar and same-phasepower supply equipment; the breaker 2QF and the current transformer 2TA are arranged between a beta bus bar and the same-phase power supply equipment; the voltage transformer 1TV is arranged on the alpha bus bar; the voltage transformer 2TV is arranged on the beta bus bar; and the current transformer 1TA, the current transformer 2TA, the voltage transformer 1TV and the voltage transformer 2TV areall connected with the microcomputer protection device. The invention also discloses a same-phase power supply equipment relay protection system-based protection method. By using the system and the method, the same-phase power supply equipment can be rapidly cut and isolated when fails, so that the same-phase power supply equipment is prevented from being damaged continuously and a failure-free part can recover normal operation rapidly; therefore, electrical energy can be continuously transmitted to an electrical locomotive safely and reliably.
Description
technical field [0001] The invention relates to a relay protection system and method for in-phase power supply equipment. Background technique [0002] Due to the particularity of the structure and load of the electrified railway traction power supply system, the three-phase power system is seriously unbalanced, and there are a large number of harmonics and reactive power. Restricted the development of high-speed, heavy-duty railway. In order to overcome the above problems, the traction power supply system generally adopts commutation measures to reduce the impact of negative sequence on the power system, adopts an automatic over-phase device to solve the problem of high-speed electric locomotive passing electric phase separation, and uses a shunt capacitor device to compensate for traction loads. achievement. However, these measures can only play a mitigating role, and there are still technical defects. For this reason, the proposal of the same-phase power supply technol...
Claims
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Login to View More IPC IPC(8): H02H7/26H02J13/00
CPCY04S10/20Y02E60/725Y02E60/00
Inventor 韩正庆陈小川王牣黄彦全熊列彬李岗高仕斌李群湛魏昕
Owner SOUTHWEST JIAOTONG UNIV