A comprehensive optimization method for economy and static safety of power system with UFC

Abstract

The invention discloses a comprehensive optimization method for economy and static security of a power system containing UPFC. Because the system safety is prior to the system operation economy, the optimization process in the present invention is divided into two layers, the outer layer takes the system operating cost as the objective function, and the inner layer takes the system static security index as the objective function, by increasing the penalty item The form connects the inner and outer objective functions. The present invention considers the static security constraints of the system N-1, since UPFC has multiple power flow control modes, and different control modes have different responses when a safety fault occurs in the system, so the present invention runs through the selection of UPFC control modes throughout the optimization in process. The particle swarm algorithm is used to solve the problem, and the inner objective function value under different control modes of UPFC is calculated for each generation of individuals, and the optimal control parameters and control mode of UPFC are selected. The calculation results show that this method can significantly improve the system operation economy and static security. sex.

Description

technical field [0001] The invention relates to the field of power system safety and control, in particular to a comprehensive optimization method for economy and static safety of a power system containing UPFC. Background technique [0002] With the development of flexible AC transmission system (FACTS) technology, more and more power electronic transmission equipment has been applied to the power system, quietly changing the transmission mode of the traditional power system. Unified Power Flow Controller (UPFC) is a typical representative of FACTS equipment. It has the ability to control line flow, stabilize bus voltage, and improve system stability. It has powerful functions and provides a new control and adjustment method for the operation of power systems. At the same time, with the continuous development of the power system, the economy and safety of the power system are becoming more and more important. In order to make more reasonable use of the existing power transm...

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Problems solved by technology

Therefore, the UPFC control mode will have an impact on the security of the system. The existing research on UPFC optimization is generally based on the UPFC constant power control mode, and only optimizes the control objectives and control parameters of the UPFC in the constant power mode, while other Insufficient consideration of the situation of the three control modes

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