Analysis And Management Of Voltage Fluctuation Of Distribution Network Caused By Surge Load

With the development of power industry, the surge and time-changed load become more and more, so modern power system cann't be measured only by voltage and frequence. This paper introduces the concept of the voltage fluctuation, and deduces the formula of the maximum reactive power method. On the basis of the formula, the voltage fluctuation of the SRF magnet power system is calculated. Then, part simulation of the system is done by using OrCAD software. Finally, the result of the simulation is compared with the result of the academic calculation to verify whether the voltage fluctuation meets. According to the standard of voltage fluctuation and flicker, the SRF magnet power system should be taken measures of reactive compensation.MATLAB is a kind of convenient software for analysis and simulation, so it is used in the power system to make a further research. This paper simulinks the transient state of thyristor switching capacitor by using MATLAB software. The result is that reactive power can be well compensated by switching capacitor, but it also produces rush current. To prevent rush current from destroying device, series reactor must be employed in the circuit.In the dynamic reactive power compensation device, microcomputer is employed as the control center and a rapid reactive power detecting method with a special thyristor controlling technology is available. It can compensate the fundamental-wave reactive power in distribution network in real time. The control mode of the main circuit and the schematic block of the device are presented in detail. By switching capacitor, the voltage fluctuation can meet the standard.