Theoretical Analysis And Simulation Of Cascade SVG

Whether for power quality,or for the power grid system stability,balanced reactive power is a key factor.On the basis of decades of intensive research and development,reactive power compensation device not only embarked on the advanced,and has become increasingly diverse.One of the most widely regarded devices in the academic field is SVG,which is a static reactive power generator.Such devices are still running,dynamic fast and extremely stable.The above advantages make SVG widely used in reactive power compensation field.In this paper,the basic concepts of reactive power are introduced,and the value of reactive power compensation is expounded.The classification and comparison of various reactive power compensation devices,the advantages and application prospects of static reactive power generator are introduced.Then,in the main circuit topology,the cascade multi-level main circuit structure is the topological form of SVG which has the greatest potential for development.Whether it is research significance or research value is great.The Reactive current detection as the most basic technology of dynamic reactive power compensation,first introduced the traditional detection method,and then for the application of a wide range of detection methods,detection methods,detection methods,etc.,but also comparative analysis of their characteristics,and finally found,Or choose SVG with high precision and rapid control of the detection method.For the cascade multi-level circuit structure with good application foreground,the article discusses the following several aspects: H-bridge cascade star wiring method,working principle,SVG cascade mathematical model,and control method.Through the implementation of SVG control method,combined with the use of direct current control method and DC side voltage balance control method.In this paper,the focus of the study is the cascade SVG.The basis of the study is to derive the mathematical model of the cascaded SVG,and then design the complete control system of SVG to calculate the control parameters.Based on the purpose of visualization of the related performance of cascade SVG,the paper analyzes the corresponding model of SVG system in high simulation environment,sets the relevant device,determines the control parameters,and analyzes the simulation data The results show that the cascaded SVG not only has a more prominent dynamic compensation performance,and highly reliable.According to the double closed-loop control theory,the DC-side voltage control in the cascade structure is difficult to be realized.Based on this,the strategy given in this study is to control the DC side voltage by stratification to realize the phase-to-phase control of the single-At the same time with the modulation wave signal on the unit voltage(single power)for a better control.