Realization of reactive power compensation based on NIC

Because capacitors used in var compensation can not change continuously, when load fluctuates, frequent switching of capacitor may result in troubles to power system and itself. The working principle and structure of the reactive power compensator based on NIC (Negative Impedance Converter) are introduced. A method to convert inductance into continuously adjustable capacitance via NIC is put forward, which is the key technique of NIC-based reactive power compensator. The inductor connected to the output port of NIC is equivalent to a capacitor at the input port, and its value changes continuously according to the continuously changeable resistance connected to the input port at the same phase. Detail circuit model is built up and simulated with Workbench to validate the expected compensation effect. Results show that the reactive power can be adjusted continuously and the power factor can be controlled between 0.93 and 0.96.