Phase modifier excitation loss protection method and device and electronic equipment

A loss-of-excitation protection and camera-adjusting technology, applied in emergency protection circuit devices, electrical components, phase sequence/synchronization indication, etc., can solve the problems of large differences in operating modes, low sensitivity, and difficulty in loss-of-excitation protection, and facilitate program implementation. , The amount of calculation is not large, and the effect of improving sensitivity

Active Publication Date: 2020-08-07
NR ELECTRIC CO LTD +1
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  • Claims
  • Application Information

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Problems solved by technology

Because there is no prime mover in the large synchronous condenser, it emits or absorbs reactive power and has no active power output during normal operation, which is quite different from the operation mode of conventional generators. It is difficult to apply the loss of field protection of conventional generators in large synchronous condensers.
The existing demagneti...

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  • Phase modifier excitation loss protection method and device and electronic equipment
  • Phase modifier excitation loss protection method and device and electronic equipment
  • Phase modifier excitation loss protection method and device and electronic equipment

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Embodiment Construction

[0063] The technical solutions of the present application will be described in detail below in conjunction with the accompanying drawings.

[0064] The present application provides a method for protection against demagnetization of a condenser. figure 2 is a schematic diagram of a method for protecting a condenser against demagnetization according to an exemplary embodiment of the present application. like figure 2 As shown, the loss-of-excitation protection method of the condenser includes: S10 electrical parameter sampling, S20 calculation of electrical parameters and their variation, and S30 fault judgment.

[0065] In S10, sampling is performed on relevant electrical parameters of the condenser. figure 1 A schematic diagram of sampling the voltage and current of the condenser is shown. figure 1 Among them, G is the condenser, T is the transformer connected to the condenser, PT is the voltage transformer at the machine terminal of the condenser, CT is the current trans...

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Abstract

The invention discloses a phase modifier excitation loss protection method and device based on a break variable criterion. The method is characterized by comprising the following steps of collecting stator voltage and current of the phase modifier and rotor voltage, calculating stator voltage, reactive power, rotor voltage value and break variable amount of the phase modifier, according to the stator voltage, the reactive power value, the rotor voltage and the amplitude and the direction of the variation of the phase modifier, comprehensively judging an excitation loss fault of the phase modifier, and performing alarm or tripping after short-time delay protection, thereby improving the protection sensitivity of the excitation loss fault of the phase modifier and the reliability under otherabnormal operation or faults.

Description

technical field [0001] The present application relates to the field of relay protection, and in particular to a method for protecting a condenser from demagnetization faults, a protection device and electronic equipment. Background technique [0002] The synchronous condenser has a large reactive power compensation capacity. When the grid voltage drops, the excitation system of the condenser can automatically adjust and implement forced excitation, and continuously provide reactive power to the system, especially for improving the UHV AC-DC hybrid grid. Voltage stability and dynamic reactive power support capability are of great significance. Since the large synchronous condenser has no prime mover, it emits or absorbs reactive power and has no active power output during normal operation, which is very different from the operation mode of the conventional generator. It is difficult to apply the demagnetization protection of the conventional generator to the large synchronous...

Claims

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Application Information

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IPC IPC(8): H02H7/06G01R29/18
CPCH02H7/065G01R29/18
Inventor 王光陈俊季遥遥姬生飞房康郭自刚王凯李华忠张琦雪
Owner NR ELECTRIC CO LTD
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