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A Voltage Stability Droop Control Strategy of Wireless Parallel Inverters

Droop control is one of the advanced wireless control techniques of parallel inverters power supply system. Wireless parallel technique brings power system many merits, such as easy installation, good flexibility and high reliability. In conventional droop control technique, if reactive loads change a lot, system voltage amplitude will fluctuate accordingly. For the sake of stability, we would like to reduce the range of voltage fluctuations to minimum. This paper presents an improved voltage droop control technology, in which voltage amplitude will be adjusted not only according to reactive power, but also the target value of voltage amplitude. So the voltage amplitude can keep stable in time of reactive loads changing rapidly. Simulation and experiment results verify the availability and validity of the proposed control strategy.