| With the rapid economical development, higher and higher demands are proposed on power quality. Custom Power is a new area of power system studies, and also an effective method to improve the distribution network power quality. Static var generator (SVG) in theory can replace conventional voltage and reactive power control components, it has the characteristics of powerful and fast response, and it is one of the focuses at this stage with the reactive power compensation and power quality control. This article is based on the design of the one-cycle control strategy SVG, and research the key technology of SVG on load side.This paper first introduces the practical significance of the reactive power compensation and its development, elaborates the principle of dynamic reactive power compensation and reactive power compensation measures. Determination of Design Schemes on the basis of theoretical knowledge, choose SVG as the basic type of options, determines the design core SVG compensation system design in a variety of reactive power compensation device, under the main program to determine separately the main circuit, the load, detection system, the control part of the specific circuit design.The main circuit select IGBT voltage SVG components; load circuit is the typical circuit three-phase bridge rectifier circuit of reactive and harmonic sources; in testing circuit, this article using the reactive current detection of instantaneous reactive power theory, and the p-q algorithm and the ip-iq algorithm are combined to get a better fundamental wave of the network side current; the control circuit is the connected core of the whole system, improve the traditional one-cycle control to obtain the corresponding trigger pulse, in order to achieve better compensation effect. All the above parts connected into a compensation system, finally, experiments and analyses the results using the MATLAB/Simulink module, the results shows that this design has a good compensation effect, and realizes the relative stability of the system. |
