Design Of100KVA Active Power Filter System

Active power filter to rapid changes in the electric power system harmonics, reactive andnegative sequence current dynamic tracking compensation. Reactive and negative sequencecurrent suppression method compared with the traditional harmonic active power filter has a fastresponse and high compensation accuracy. With the development of power electronicstechnology, modern digital signal processing and intelligent control technology and many otherdisciplines, not only improve the performance of active power filter, while achieving a modularactive filter, integration and miniaturization in the market with good development potential.Active power filter control system is the key to determine the performance of the filter paper firstdescribes the shunt active power filter works through the main circuit of the a double maincircuit design to improve the capacity of the system and IGBT the switching frequency, and twoduplicated based on the timing phase shift to achieve. Compare control of the triangular wave atthe same time conducted intensive studies and using the PCB to the various circuits is drawn:including current, voltage sampling circuit, based on the M57962AL the IGBT driver circuit, andthe control of the triangular wave comparing circuit, as well as various temperature, overcurrent,overvoltage protection circuit. After debugging and improved and achieved good results, thedesign requirements.Throughout the monitoring, sampling, communication aspects, this article details the RTUand ASCII RS232with RS485communications protocols as well as MODBUS twocommunication, while the design of the PLC, power meter, touch screen, DSP-based samplingsystem to constantly monitor the entire APF the compensation system at any time tracking,improve and protect.