Wide-area spare power automatic switching logic unified expression method and after-operation overload processing method

Abstract

The invention provides a wide-area spare power automatic switching logic unified expression method and an after-operation overload processing method, comprising four logic determination conditions: a charging condition, a blocking condition, a triggering condition and an operation condition. When the charging condition is fulfilled and the blocking condition is not fulfilled, the wide-area spare power automatic switching enters a charging state. After charging, if both the triggering condition and the operation condition are fulfilled, the spare power automatic switching enters an operation process. The spare power automatic switching periodically calculates and speculates whether overload occurs after operation. If the spare power automatic switching is in an open-loop operation state, an overload load reduction scheme is real-time generated or updated; and if the spare power automatic switching is in a close-loop operation state, the spare power automatic switching is directly locked and a warning is given after the after-operation overload is found. With the method of the invention, a unified expression towards the recovery process of the complicated wiring mode and the operation mode of the wide-area spare power automatic switching system is made, usage range of the wide-area spare power automatic switching is increased, a wide-area spare power automatic switching standard technical specification is provided, research and application of the wide-area spare power automatic switching are promoted, power supply reliability is improved and cost is reduced.

Description

technical field [0001] The invention relates to the field of automatic dispatching of electric power systems, in particular to a unified expression method of wide-area standby automatic switching logic and a practical method for handling overload after operation. Background technique [0002] At present, an important method to improve the reliability of continuous power supply is to install equipment self-injection devices in substations. When the power supply fails and the equipment loses power, the main power supply side switch will be cut off, and the backup power side switch will be turned on, and the backup power supply will continue to supply power, so as to meet the continuous power supply needs of users. For more complex wiring and operation modes, it is necessary to install a wide-area backup automatic switching system on the main station side to provide the function of automatic recovery after failure. [0003] The existing wide-area backup auto-switching system b...

AI Technical Summary

Problems solved by technology

It will be difficult to guarantee the reliability of the action if the logical expression of the backup auto-switching in the station is directly copied to the wide-area backup auto-switching

[0005] (2) The traditional in-station backup auto-switching action process is single, basically it is divided into one switch, and then closed with another switch

However, when wide-area backup and automatic switching involves the recovery of regional power grids, the equipment and operation methods to be considered are much more complex than those of a single station backup and automatic switching. Therefore, it will be difficult to express the operation by directly copying the logic of in-station backup and automatic switching to wide-area backup and automatic switching. complexity of the way

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