Method and device for eliminating ferromagnetic resonance in active compensation system

A ferromagnetic resonance, compensation system technology, applied in circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, emergency protection circuit devices, etc. It can improve the efficiency of harmonic elimination, ensure safe and stable operation, and reduce the cost of harmonic elimination.

Active Publication Date: 2021-06-25
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] This application provides a ferromagnetic resonance elimination method and device in an active compensation system to solve the problems that the existing resonance elimination method cannot guarantee the resonance elimination effect and the resonance efficiency is low

Method used

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  • Method and device for eliminating ferromagnetic resonance in active compensation system
  • Method and device for eliminating ferromagnetic resonance in active compensation system
  • Method and device for eliminating ferromagnetic resonance in active compensation system

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Embodiment Construction

[0038] figure 1 It is a flowchart of a method for eliminating ferromagnetic resonance in an active compensation system provided by an embodiment of the present invention.

[0039] see figure 1 , a ferromagnetic resonance elimination method in an active compensation system provided by an embodiment of the present invention is used to eliminate ferromagnetic resonance, which can shorten the resonance elimination time, reduce the resonance elimination cost, and improve the resonance elimination efficiency to ensure power distribution The safe and stable operation of the network.

[0040] Specifically, the elimination method includes the following steps:

[0041] S1. Detect the neutral point voltage of the distribution network system according to the predetermined detection cycle;

[0042] After the active compensation system is used to compensate the voltage of the distribution network system, the active compensation system exits the compensation state, and the system returns ...

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Abstract

This application discloses a method and device for eliminating ferromagnetic resonance in an active compensation system. According to a predetermined detection cycle, the neutral point voltage of the distribution network system is detected, and it is judged whether ferromagnetic resonance occurs in the distribution network system within each predetermined detection cycle. Magnetic resonance: when ferromagnetic resonance occurs in the distribution network system, the active compensator is used to output the control voltage, and the ferromagnetic resonance is eliminated after a predetermined duration. It can be seen that the elimination method and device provided by the present invention can accurately determine the moment when ferromagnetic resonance occurs in the distribution network system, and when eliminating the ferromagnetic resonance generated by the distribution network system, the resonance elimination time can be shortened, and the Reduce the cost of harmonic elimination and improve the efficiency of harmonic elimination to ensure the safe and stable operation of the distribution network.

Description

technical field [0001] The present application relates to the technical field of full compensation for single-phase grounding of distribution network systems, in particular to a method and device for eliminating ferromagnetic resonance in an active compensation system. Background technique [0002] During the operation of the distribution network system, single-phase ground faults are prone to occur, and active compensation systems need to be used for voltage compensation. Specifically, the distribution network adopts an active compensation method, and an active compensator is used to compensate the capacitive current when the system is single-phase grounded at the neutral point of the system, and the system appears as a metallic ground. When the active compensator exits the compensation state, the system returns to the normal state from the metallic ground state. At this time, the probability of ferromagnetic resonance is relatively high. Ferroresonance is a common system ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H9/00
CPCH02H9/007
Inventor 刘红文王科柴晨超
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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