Fundamental Frequency Optimization PAM Method Of Chain SVG

Static Var Generator (SVG) can compensate reactive power andimprove power factor and power quality of power system so that it canprotect the system. In middle and high voltage systems, the chain SVGhas become a research focus because it has better characteristics ofreactive power than the traditional topology SVG.In order to ensure that the chain SVG can be safely used in actualapplication, this paper introduces the basic topology theoretically for itsstructure and analysis its mathematical model. The roots of thecharacteristic equation obtained through mathematical models prove thatthe device is a progressive stabilization device. After determining thefeasibility of the topology, the concrete formulas are derived in detail bythe selection of device parameters based on the existing principles.Considering the device compensation target, this paper introduces asingle-phase instantaneous reactive power detection method which is inview of three-phase instantaneous reactive power.When proven the stability in topology, derived the device parameter,detected the reactive power, a good control strategy is crucial. This paperproposes a fundamental frequency optimization PAM method which isapplicable to the chain SVG characteristics and application environment.The method can make the switching frequency of the power switchdevices to50Hz. At the same time it can ensure that the response speed and control precision reach the device interconnection requirements. Thispaper solves the difficulty of the method in detail and validates bysimulation.In the end, the chain SVG is researched by experiment. This paperfirst introduces the framework of the overall structure of the device; thenintroduces the main circuit and control circuit of the device. This paperdescribes the function of the two chips in the control circuit. Finally, webuild and test the experimental prototype of the device. The experimentalresults show that the proposed method is feasible and effective.