Multi-system integrated intelligent substation relay protection dynamic regular inspection method

Abstract

The invention discloses a multi-system integrated intelligent substation relay protection dynamic regular inspection method. The method comprises the steps: setting an automatic inspection period, anautomatic regular inspection period and an early warning period; initializing regular inspection counting time of each inspection item as initial timing time; and carrying out automatic inspection oneach inspection item in the automatic inspection period to obtain corresponding automatic inspection results; and carrying out result confirmation according to the automatic inspection results and resetting regular inspection counting time. According to the invention, in the automatic regular inspection period and before the early warning period, when inspection items all act correctly, and automatic inspection results are normal, the relay protection device can perform regular inspection completely without stopping, and the regular inspection period is prolonged; if the automatic inspection results of the inspection items are no result all the time, the relay protection device enters the early warning period and needs to be stopped for regular inspection, and only the inspection items which do not act can be inspected according to the inspection items, so that the number of the regular inspection items can be reduced to the minimum, the power failure time is shortened, and the regularinspection workload is reduced.

Description

technical field [0001] The invention is applicable to the technical field of secondary operation and maintenance of intelligent substations, and in particular relates to a dynamic regular inspection method for relay protection of intelligent substations integrated with multiple systems. Background technique [0002] At present, the relay protection of the power system put into operation adopts the method of regular inspection, and the regular inspection cycle is generally three years according to the requirements of relevant regulations. When the regular inspection period is up, no matter whether the current equipment is running normally, the relay protection device must be stopped for inspection. The inspection items and inspection outline vary according to the level and type of voltage protection. This periodic regular inspection mode can find some hidden dangers in relay protection, including substandard sampling accuracy, excessive zero drift, and failure of input / output...

AI Technical Summary

Problems solved by technology

This periodic periodic inspection mode can find some hidden dangers in relay protection, including substandard sampling accuracy, excessive zero drift, and failure of input / output, etc.

However, this mode of shutting down and overhauling strictly according to the regular inspection cycle has a large workload and a long test cycle, which requires a certain amount of manpower and material resources. If the relay protection device is to be shut down, the primary line interval corresponding to the relay protection may also be required. Power failure, affecting the continuity of power supply

In addition, the security measures in the inspection process are complicated to set up. During the restoration process of the inspection, the missing or wrong switching of the pressure plate and the wrong recovery of the modified setting often occur, which additionally increases the risk of wrong behavior of the relay protection. Therefore, there are It means that the relay protection equipment is not worn out, but a broken state

The condition-based maintenance of secondary equipment is another new way to replace the regular inspection of relay protection. However, at this stage, the research and standardization of the input and output of the condition-based maintenance and the intermediate model are still a long way from the actual engineering application. distance

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