Design and application of reactive power automatic compensation control system based on S7-200 series PLC

In order to solve problems of high demands on the work environment and quality of power supply,and poor reliability of electronic circuit switching controller,proposed the design plan of reactive power automatic compensation based on S7-200 series PLC. The reactive power automatic compensation control system can effectively improve the power factor,reduce the loss of power transformers and transmission lines and improve the power supply environment,so it has remarkable energy-saving effect.