A comprehensive overvoltage control and arc suppression coil grounding fault management system

Abstract

The invention relates to the technical field of electric power protection, and discloses an overvoltage comprehensive control and arc suppression coil grounding fault management system, including a system voltage control module, an arc suppression coil automatic tracking compensation module, a fault location module, an internal overvoltage processing module, a grounding Transformer and monitoring center module, in which the arc suppressing coil automatic tracking compensation module, fault location module and internal overvoltage processing module are connected in parallel to the neutral point of the grounding transformer, and the grounding transformer is connected in parallel to the system voltage control module to the busbar of the power supply network system, the present invention comprehensively considers the causes of overvoltage and possible damage, realizes an integral control of the grid voltage, ensures the safe operation of all power supply and consumption equipment in the entire equipotential system, and ensures the continuity of power supply , has high practical value and broad application prospects.

Description

An overvoltage comprehensive control and arc suppression coil grounding fault management system technical field The present invention relates to electric power protection technical field, be specifically related to a kind of overvoltage comprehensive control and arc suppression coil grounding failure fault management system. Background technique The voltage control of the power supply network is different from the current protection, and the current protection is generally implemented in units of branches. Comprehensive protection can be achieved with circuit breakers, while voltage protection is an equipotential for the entire power supply network at a certain voltage level. It is relatively difficult to handle. Once a fault occurs, the loss will be greater, so the control of the system voltage is particularly important. want. At present, most of the protection schemes used in medium-voltage power systems adopt a single protection measure for a certain fault cause....

AI Technical Summary

Problems solved by technology

The effect in actual operation is not ideal, mainly because the whole medium-voltage power supply system is an equipotential, and if there is no overall coordination of parameters for various overvoltage protection devices, the protection settings cannot form an overall protection system. The result is As a result, some protection devices are useless, and even some protection devices themselves form a point of failure, which adds trouble to users.

For example, arc suppression cabinet products that "quickly change arc grounding to metal grounding" generally adopt a fast-acting scheme if there is no protection cooperation from the previous level. Then, once the voltage changes, even if it is instantaneous, the arc suppression device It will be grounded, and the technicians cannot determine the cause of the failure afterwards, which is the so-called false malfunction.

Some arc suppression cabinets set up by the user power supply network operate as many as dozens of times a year, and finally they can only be withdrawn from use. This is because the protection scheme does not form a whole

However, since the energy of a separate suppression cabinet cannot be set to infinity, once the energy of the overvoltage exceeds the design capacity, the energy suppression device will also break down and explode.

[0004] Further, since the control of power grid quality should include three levels of measurement, analysis, and processing, and the system voltage is often an equipotential, the protection scheme of using a certain product to prevent a single overvoltage has been unable to meet the requirements of modern power grids for power supply quality. protection requirements

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