Wide area information-based automatic standby power supply switching adaptive modeling and controlling method

Abstract

The invention discloses a wide area information-based automatic standby power supply switching adaptive modeling, standby power supply overload optimal control strategy predetermining and automatic standby power supply switching model optimizing and controlling method. The method comprises the following steps of: performing automatic standby power supply switching adaptive modeling and establishing multi-valued mapping from a fault tripping power aggregate to an automatic standby power supply switching mode aggregate; predetermining a standby power supply overload optimal control strategy; optimizing an automatic standby power supply switching model; judging a regional fault; and performing online matching and control tracking of control strategies. In the method, modeling is performed under the running condition of a regional power grid, and charging and discharging conditions, starting conditions and automatic standby power supply switching logic of the wide area are automatically generated, so that the method adapts to the varying run mode and wide area automatic standby power supply switching; an overload load shedding control strategy and the automatic standby power supply switching model are optimized based on the predetermining method; the judgment of the regional fault coordinates the automatic standby power supply switching model action for multi-power fault tripping and avoids unplanned loop closing; the control strategy is matched and searched online; and by considering that a small power supply is matched with a stable control system and a protection device, after the standby power supply is switched into operation, safe and stable running of the system is guaranteed.

Description

technical field [0001] The invention relates to the field of power systems, in particular to an adaptive modeling and control method for automatic input of standby power based on wide-area information. Background technique [0002] With the development of social economy, the scale of power grid is getting bigger and bigger, the structure of power grid is becoming more and more complex, and users have higher and higher requirements for the quality and reliability of power supply. In order to meet the needs of economical and safe operation of the power grid, the power grid wiring generally adopts a closed-loop design and an open-loop operation mode. Some 220kV ring network de-loop operation and 220kV busbars are separated, so that the short-circuit current is controlled and the normal operation of the local power grid is solved. The problem of line overload under normal circumstances and the severe overload of some lines under N-1 fault have improved the power transmission cap...

AI Technical Summary

Problems solved by technology

[0003] At present, the application of the conventional standby automatic switch-on device is based on the local information, and the "operation sequence table" is manually preset and input, and the automatic input of the backup power supply is realized according to the predetermined "operation sequence table". method, since the operation sequence list is manually input, if the network structure or related data of the power grid system changes, if it is necessary to change the automatic input mode or switching control strategy of the backup and automatic switching, it is necessary to manually change the operation sequence list , this method not only consumes manpower and material resources, but also takes a lot of time to modify the operation sequence list to correspond to the changed power grid system. Realize the optimization of different standby automatic switching modes, and cannot realize the cooperation with safety and stability control devices and protection devices. The impact of small power sources on the standby automatic switching strategy is not considered in detail, and the overload after the standby power supply is put into operation cannot be optimized to meet the control strategy. Even, the accident may expand after the automatic switch-on operation, resulting in a large-scale power outage

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