Control method for distribution network active filtering quiescent reactive compensation

The invention discloses a control method for distribution network active filtering quiescent reactive compensation. The method comprises the following steps: calculating and processing real-time data acquired by a data acquisition system; extracting a fundamental component in the acquired current data; working out a compensatory reference current by the acquired current; calculating the effective value and average value of voltages and currents; calculating the PWM duty ratio of phases in a next control cycle based on the current reference value and the actual measured value, and adding a compensation factor and dead zone control based on the deadbeat; and sending the effective value, the average value and the soft failure information to a fixed-point digital processor through a dual-ported RAM. The method has good performance and a rapid dynamic response, and can effectively reduce the burrs of an emitted current and the distortion of a crossover point, inhibit the harmonic waves in the vicinity of switching frequency, greatly reduce the higher harmonics in the vicinity of the switching frequency, and extract an instruction current precisely without the influence of systematic parameters. The modularized design of the all parts brings about a clear structure for easy tracking and maintenance.