A high-speed response reactive controller used for power system reactive power compensation control belongs to the technical field of energy and electricity conservation and power quality control. The high-speed response reactive controller is characterized in that voltage and current information of a power supply system is collected and then sent to an FPGA (Field Programmable Gate Array) or a CPLD (Complex Programmable Logic Device) functional module for calculation and processing after passing various comparators. At last corresponding system parameters are displayed by an LED and are output through a multi-channel thyristor, so as to drive a reactive power compensation device to switch. Comparing units include a zero crossing comparator, a peak value comparator, an amplitude comparator and a phase-lock loop; all the comparators are connected to the FPGA functional module; and the FPGA functional module comprises a pulse generator, an XOR gate, a counter, a D trigger, a cosine function table, a phase compensator, and LED drive and D/A output. The utility model has the benefits of stability and reliability in running, strong anti-interference ability, accurate detection and judge, and high speed in sending out a switching instruction.
High-speed response reactive controller