Protection method for increasing fault motion speed in bus protection areas by utilizing cameras

Abstract

The invention provides a protection method for increasing the fault motion speed in bus protection areas by utilizing cameras. The cameras are installed at two sides of a bus; the cameras are used for shooting whether arc light exists or not when different types of bus areas are failed; then, a shooting result is sent to a certain special image identification equipment; the equipment judges whether arc light is generated or not; a judgement result is sent to a bus protector in a simple digital manner; if the cameras shoot arc light, the fact that the bus areas are failed can be determined; the bus protector rapid moves; the judgement result and delay processing of components, such as a CT saturator, are not considered; and, if the cameras do not shoot arc light, the bus protector performs judgement according to original logic. By means of the method, the motion speed of the bus protector can be enhanced under a condition that arc light exists; therefore, faults in the bus areas can be rapidly removed easily; and the stability of a power system is kept.

Description

technical field [0001] The invention belongs to the field of power systems, and more particularly relates to a new method for improving the fault action speed in the bus protection area by using a camera for the relay protection bus protection of the power system. Background technique [0002] Since the busbar plays the role of collecting and distributing electric energy in the power system, the busbar protection plays a very important role in the field of relay protection of the power system. As the capacity of the power system increases, the loss caused by system stability damage is also increasing. Busbar protection needs to act as quickly as possible to remove the fault when there is a fault in the busbar area, which is very important for maintaining the stability of the power system. [0003] There are many faults in the bus area. In addition to typical metallic faults, there are transition resistance faults, CT saturation, conversion faults, and faults during system o...

AI Technical Summary

Problems solved by technology

In order for the busbar protection to operate correctly under the above conditions, the existing busbar protection has a series of complex criteria, such as delay action when transferring from outside the zone to in-zone faults, and blocking the busbar protection for a certain period of time when the CT saturation of the out-of-zone fault Wait

Although the above measures ensure the correctness of the protection action behavior, the existence of various complex criteria and delay elements will inevitably reduce the action speed of the busbar protection when it fails in the zone

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