Three-loop control algorithm of static var generator

Abstract

The invention discloses a three-loop control algorithm of a static var generator. From an angle of analyzing stability of a system transmission function by a locus method, a reactive current speed negative feedback correction link is added on the basis of the traditional double-loop control algorithm of the SVG (Static Var Generator) with a voltage outer loop and a current inner loop; through the adoption of a control loop zero-pole matching technology for improving the stability of the whole SVG, an optimal system zero-pole position is sought in the process of designing parameters of the reactive current speed negative feedback correction link, so as to form the reactive current speed negative feedback correction link, which meets the requirement for system stability; and then a novel SVG three-loop control algorithm based on the voltage outer loop, the current inner loop and a stable correction loop is formed.

Description

technical field [0001] The invention relates to a control algorithm of a static var generator (SVG), in particular to a three-loop control algorithm of a static var generator based on a voltage outer loop, a current inner loop and a stability correction loop. Background technique [0002] With the development of power electronics technology, the use of various nonlinear and impact equipment has brought a lot of harmonic pollution to the power grid, resulting in problems such as low power factor, serious harmonic pollution, and increased system loss. All kinds of reactive power compensation and harmonic control FACTS (Flexible AC Transmission System) equipment came into being. The compensation performance of reactive power compensation equipment such as static var generators depends on its control algorithm. Only by adopting a reasonable and appropriate control algorithm can good dynamic performance and stable performance be obtained. At present, the control algorithm used f...

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