分布式发电电压协调控制策略研究

本文研究了50 kW分布式发电电压自治装置的控制策略,其原理是采用并网运行时的电网频率和电网电压作为支撑,根据输入输出功率、直流侧电压或充放电电流在AC/DC侧设计了恒压控制器、恒流控制器、Vf控制器,在DC/DC侧设计了恒压控制器、恒流控制器. 本文搭建了试验平台对分布式发电电压自治装置进行测试,感性无功降低电压实验和容性无功升高电压实验的结果表明,该装置具有良好的无功变化抗扰度. 直流母线电压稳定性测试实验结果表明,该装置的电压具有良好的稳定性.

Research on Autonomous Control Strategies forDistributed Generation Voltage

The paper designs effective control strategies for the autonomous device of 50 kW distributed generation voltage. On the support of the power frequency and network voltage in grid-connected operation,the author puts constant voltage controllers,constant current controllers and VF controllers on AC/DC side in the light of input & output power,DC side voltage or charging & discharging current,and puts constant pressure controllers and constant current controllers on DC/DC side. The paper builds a testing platform to conduct actual measurements of the autonomous device of distributed generation voltage under the control strategies designed here. The inductive reactive voltage derating experiment and capacitive reactive voltage boosting experiment have proven that the device possesses fine noise immunity of reactive power variation,and the stability test of DC-bus voltage has proven that the device’s voltage is highly stable.