Research on electromagnetic power quality hybrid governance device for distribution network

Encouraged by policies such as “photovoltaic poverty alleviation” and “home appliances going to the countryside”, the power electronic equipment and distributed power supply in distribution network are increasing rapidly in both capacity and quantity, and their power quality problems are more serious and complicated. Many power quality interference problems such as low voltage, high voltage and harmonic distortion appear at the same time, which puts forward new and higher requirements for the types and functions of governance equipment. In order to improve the power quality problems in the station area and improve the absorptive capacity of distributed photovoltaic, At present, reactive power compensation capacitor, on-load tap changer, commutation switch, active power filter (APF), dynamic reactive power compensation device (SVG) and other traditional technical means are mostly used for treatment, which have single function, high loss and poor self-reliability, so it is difficult to popularize and apply on a large scale. Aiming at the problems and shortcomings of the existing power quality control devices, this paper puts forward an electromagnetic power quality comprehensive control device suitable for distribution network, which has the comprehensive control functions of many power quality indexes such as low voltage, overvoltage and harmonics, compact equipment structure, small floor space, low loss and calorific value, all the equipment is passive devices, and does not need complex control and maintenance and cooling systems. It has been successfully applied in many engineering sites and achieved good control effects, which is worth popularizing.