Two-stage multi-target addressing method for UPFC (unified power flow controller)

Abstract

The invention discloses a two-stage multi-target addressing method for a UPFC (unified power flow controller), and belongs to the technical field of operation and control of power systems. The method achieves the addressing of the UPFC at two stages based on an analytic hierarchy process, and comprises the steps: estimating the risk of each branch circuit through a branch circuit comprehensive load rate and the comprehensive vulnerability from the angle of system safety and stability, scoring each branch circuit, and preliminarily screening out an alternative branch circuit set of the UPFC; calculating the investment ratio of a UPFC and power grid construction replacement alternative scheme, the operation benefits of the UPFC, the control sensitivity and the damping gradient of the system after the UPFC is installed from the economic benefits and the safety benefits brought by the UPFC, obtaining the comprehensive score of each branch through combining with the scores of the alternative branch circuits at the first stage, and giving a recommended installation site of the UPFC. The method achieves the complete evaluation of the indexes, reduces the calculation scale through a stage dividing method, and can provide instructive advices for the addressing of the UPFC for a power grid planning worker.

Description

technical field [0001] The invention discloses a two-stage multi-objective site selection method for a unified power flow controller, which belongs to the technical field of power system operation and control. Background technique [0002] With the development of economy and technology, problems such as strengthening interconnection between power system regions, gradually increasing transmission voltage levels, nonlinear loads and high-precision electrical equipment have increasingly high requirements for power quality, and traditional power technologies are no longer sufficient. To solve the above problems, the increasingly perfect high-power flexible AC transmission technology provides a feasible solution for these problems. [0003] The concept of unified power flow controller (Unified Power Flow Controller, UPFC) was first proposed by Dr. L. Gyugyi of Westinghouse Technology Center in 1991. UPFC is a typical representative of the third-generation Flexible Alternative Cu...

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Problems solved by technology

[0005] The purpose of the invention is to address the shortcomings of the above-mentioned background technology, provide a two-stage multi-objective site selection method for a unified power flow controller, comprehensively evaluate the indicators that affect UPFC site selection and reduce the calculation scale, and solve the problem of existing UPFC site selection methods. The technical problem of the single evaluation target of site method selection

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