不同电压扰动下光储直流微电网接地抗干扰技术

Grounding Anti-interference Technology of Optical Storage DC Microgrid Under Different Voltage Disturbances

光储直流微电网接地过程中会产生大量的电压波动,其对微电网电力信号稳定性具有恶劣影响。由于当前光储直流微电网接地抗干扰技术的电压扰动信号捕捉能力较差,导致其无法在不同电压扰动下完成信号抗干扰处理,故设计不同电压扰动下光储直流微电网接地抗干扰技术。首先构建光储直流微电网模型,然后确定在接地工作中使用的并网变换器微电网设备,分析接地过程中的电流变化情况。采用粒子群优化算法,设计电压扰动信号检测算法。最后根据信号检测结果,将微电网接地方式设定为混合型接地模式,处理微电网交流回路中的干扰信号。仿真结果表明,所提的不同电压扰动下光储直流微电网接地抗干扰技术在多种电压扰动下,可有效剔除干扰信号,保证了电网信号输出的稳定性。

A large number of voltage fluctuations will occur in the grounding process of optical storage DC microgrid,which has a bad impact on the stability of microgrid power signal.Due to the poor voltage disturbance signal capture ability of the present optical storage DC microgrid grounding anti-interference technology,it is unable to complete the signal anti-interference processing under different voltage disturbances.Therefore,the optical storage DC microgrid grounding anti-interference technology under different voltage disturbances was designed.Firstly,the optical storage DC microgrid model was constructed,then the grid connected converter microgrid equipment used in grounding was determined,and the current change in the grounding process was analyzed.The particle swarm optimization algorithm was used to design the voltage disturbance signal detection algorithm.Finally,according to the signal detection results,the microgrid grounding mode was set as the hybrid grounding mode to process the interference signal in the microgrid AC circuit.The simulation results show that the proposed grounding anti-interference technology of optical storage DC microgrid under different voltage disturbances can effectively eliminate the interference signals and ensure the stability of power grid signal output under various voltage disturbances.