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Ground fault full-compensation system and method for multiplexing parallel reactive power compensation

A ground fault and compensation system technology, applied in the field of power system, can solve the problem of low utilization rate of single-phase grounding compensation device, and achieve the effects of reduced volume, low comprehensive cost, and convenient deployment and implementation.

Pending Publication Date: 2020-08-07
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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Problems solved by technology

[0005] This application provides a ground fault full compensation system and method for multiplexing parallel reactive power compensation to solve the technical problem of low utilization of single-phase ground fault compensation devices

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  • Ground fault full-compensation system and method for multiplexing parallel reactive power compensation
  • Ground fault full-compensation system and method for multiplexing parallel reactive power compensation

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Embodiment Construction

[0042] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0043] This application provides a multiplex parallel reactive power compensation ground fault full compensation system, such as figure 1 As shown, the system includes a phase power supply converter 1, a multiplexing compensation device 2, a ground fault compensation switch 3, an injection transformer 4, and a multiplexing controller 5, where...

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Abstract

The invention provides a ground fault full-compensation system and method for multiplexing parallel reactive power compensation. The system is composed of a phase power supply converter, a multiplexing compensation device, a grounding fault compensation switch, an injection transformer and a multiplexing controller. The multiplexing controller judges whether the system is in a normal operation state or a single-phase ground fault state according to acquired signals; when the power system is in the normal operation state, the ground fault compensation switch is switched off, and the multiplexing compensation device performs reactive power compensation on the power system; and when a single-phase ground fault occurs in the power system, a grounding phase is determined, a corresponding groundphase switch of the ground phase is closed, and the transformation ratio of the injection transformer is adjusted to carry out single-phase ground fault full compensation. The system carries out reactive power compensation when the power system normally operates, carries out grounding fault current full compensation when the single-phase grounding fault occurs in the system, works in a full lifecycle, and improves the utilization rate of a single-phase grounding compensation device.

Description

technical field [0001] The present application relates to the technical field of power systems, in particular to a ground fault full compensation system and method for multiplexing parallel reactive power compensation. Background technique [0002] Single-phase ground faults in distribution networks at home and abroad account for more than 80%, which seriously affects the safe operation of power grids and equipment. Safe handling of ground faults plays an important role in social and economic development. When the capacitive current of the system is greater than 10A, the arc suppressing coil is grounded. The arc suppressing coil can reduce the fault current to a certain extent, and the system can run for 2 hours with a fault, but the arc suppressing coil cannot realize full compensation, and there is still a residual current of less than 10A at the fault point, which can cause personal electric shock and fire accidents , and seriously threaten the safe and stable operation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/08H02J3/18
CPCH02H9/08H02J3/1842Y02E40/30
Inventor 刘红文王科赵现平姜虹云张恭源柴晨超
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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