董家伟, 侯院军, 龚春阳, 包俊, 王志新. 基于二阶超前滞后环节的电压控制型微电网并网逆变器功率无差同步补偿策略[J]. 高电压技术, 2023, 49(2): 849-859. DOI: 10.13336/j.1003-6520.hve.20220676
引用本文: 董家伟, 侯院军, 龚春阳, 包俊, 王志新. 基于二阶超前滞后环节的电压控制型微电网并网逆变器功率无差同步补偿策略[J]. 高电压技术, 2023, 49(2): 849-859. DOI: 10.13336/j.1003-6520.hve.20220676
DONG Jiawei, HOU Yuanjun, GONG Chunyang, BAO Jun, WANG Zhixin. Second-order Lead-lag Link Based Power Synchronization Compensation Strategy of Voltage-controlled Grid-connected Microgrid Inverter[J]. High Voltage Engineering, 2023, 49(2): 849-859. DOI: 10.13336/j.1003-6520.hve.20220676
Citation: DONG Jiawei, HOU Yuanjun, GONG Chunyang, BAO Jun, WANG Zhixin. Second-order Lead-lag Link Based Power Synchronization Compensation Strategy of Voltage-controlled Grid-connected Microgrid Inverter[J]. High Voltage Engineering, 2023, 49(2): 849-859. DOI: 10.13336/j.1003-6520.hve.20220676

基于二阶超前滞后环节的电压控制型微电网并网逆变器功率无差同步补偿策略

Second-order Lead-lag Link Based Power Synchronization Compensation Strategy of Voltage-controlled Grid-connected Microgrid Inverter

  • 摘要: 电压控制型策略可以作为微电网逆变器的并网运行控制策略,其与电网的同步过程为功率无差同步。然而,基本的PI调节器的功率无差同步策略响应速度慢,响应过程超调大,且无法通过PI参数的调配改善响应过程动态。为改善电压控制型逆变器功率无差同步的动态调节过程,提出了基于二阶实极点补偿器(real-pole compensator,RPC)和复极点补偿器(complex-pole compensator,CPC)的超前滞后环节补偿器,作为电压控制型逆变器的功率无差同步补偿策略。基于电压控制型逆变器功率输出模型,分析了2类补偿器的参数设计原则,详细给出了实极点补偿器和复极点补偿器的参数设计过程。通过仿真,验证了所提出的2类补偿器与常用的高通滤波器补偿器的补偿效果。结果表明,提出的2类补偿器在频域上可以有效地提高系统剪切频率,提高相位裕度至60°以上,而在时域上有效加速功率无差同步过程,并降低同步过程超调,使得功率无差同步过程更加平稳。

     

    Abstract: Voltage-controlled strategy is capable for the grid-connected control of microgrid inverters, its synchronization process with the power grid is power zero difference synchronization. However, the power synchronization strategy of the basic PI regulator has a slow response speed, large overshoot in the response process. In addition, the response cannot be improved through the adjustment of PI parameters. In order to improve the dynamic regulation process of voltage control inverter power synchronization, this paper proposes a second-order lead-lag compensator based on real-pole compensator (RPC) and complex-pole compensator (CPC) for the power synchronization control of voltage-controlled inverter. Based on the power output model of the voltage-controlled inverter, the parameter design principles of the two types of compensators are analyzed, and the parameter design process of the real-pole compensator and the complex-pole compensator is established in detail. Through simulation, the compensation effects of the proposed two types of compensators and the commonly used high-pass filter compensators are verified. The two types of compensators can effectively increase the system cutting frequency and increase the phase margin to over 60° in the frequency domain, and effectively accelerate the power synchronization process in the time domain and reduce the overshoot of the synchronization process, making the power synchronization process more stable.

     

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