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Method for triggering trip reverse power protection and trip reverse power protection device

A reverse power protection and power technology, which is applied in the direction of emergency protection circuit devices, electrical components, etc., can solve the problems of generator set tripping, reverse power protection and refusal

Pending Publication Date: 2022-04-29
大唐渭南热电有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This application provides a method for triggering tripping reverse power protection and a tripping reverse power protection device to solve the problem that the tripping reverse power protection of the generator set refuses to operate when the generator set tripping reverse power protection is used

Method used

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  • Method for triggering trip reverse power protection and trip reverse power protection device
  • Method for triggering trip reverse power protection and trip reverse power protection device
  • Method for triggering trip reverse power protection and trip reverse power protection device

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Embodiment Construction

[0079] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application are clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, not all Example. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts also belong to the scope of protection of this application.

[0080] First, the nouns involved in this application are explained:

[0081] Program tripping mode: When the generator set is shut down or under abnormal protection, the program tripping mode first closes the main steam valve of the steam turbine. Negative value, when the action power of the reverse power relay is reached, disconnect the circuit breaker of the generating set or the transformer set of the generating set, dema...

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Abstract

The invention provides a trip-trip reverse power protection triggering method and a trip-trip reverse power protection device. The trip-trip reverse power protection triggering method comprises the following steps: acquiring power factors among phase voltages and currents in three-phase voltages and currents of a generator set through a synchronous error reducing method, a frequency difference ordinal number reducing method or a rounding error reducing method; and obtaining the first active power corresponding to the power factor according to the power factor, and reducing the calculation error of the power factor, thereby reducing the calculation error of the active power. Moreover, under different working conditions of the generator set, a plurality of second active powers of the generator set are obtained, and the target setting value is obtained according to the plurality of second active powers and the deviation value, so that the target setting value set in the trip reverse power protection device is closer to a real setting value when the generator set is shut down. Therefore, when the first active power is greater than or equal to the target setting value, the trip-trip reverse power protection action of the trip-trip reverse power protection device is triggered, so that the generator set is shut down safely, and the phenomenon that the trip-trip reverse power protection device refuses to act is avoided.

Description

technical field [0001] The present application relates to the technical field of power generation, and in particular to a method for triggering tripping reverse power protection and a tripping reverse power protection device. Background technique [0002] With the increase in demand for electricity and the requirements for energy conservation and environmental protection, more and more ultra-high voltage and ultra-high voltage power grids and large-scale generating sets have been put into production. Among them, when the large-scale generator set is manually shut down due to normal operation or equipment shortage during operation, in order to prevent the steam turbine from overspeeding, it is necessary to use the program trip method to shut down, that is, to use the generator set reverse power protection to shut down. In addition, abnormal operation protections such as stator winding symmetrical overload protection and rotor surface negative sequence overload protection of l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/06
CPCH02H7/06Y02E40/30
Inventor 肖小龙蔡高峰王飞
Owner 大唐渭南热电有限公司
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