摘要
较高的可再生能源渗透率导致微电网惯性不足,孤岛情况下调频能力较差。为提高微电网一次调频快速性及经济性,提出考虑电压参与的源荷共同调频控制策略。首先分析电压变化对负荷实际吸收功率产生影响,从而进一步影响频率变化的过程,并提出基于电压的频率控制法,在传统调频控制的基础上利用电压辅助调频,以降低大扰动对微电网频率的干扰。在DIgSILENT/PowerFactory仿真软件中建立典型微电网模型,仿真结果表明,该策略可改善微电网调频能力,有效提高调频的经济性。
High penetration of renewable energy leads to insufficient of the microgrid inertia and poor frequency regulation ability of isolated microgrid.In order to improve the speed and economy of microgrid frequency regulation,this paper proposes a microgrid frequency control strategy considering the joint participation of micro-source and load.First of all,the impact of voltage changes on load absorption,which further affects the frequency is analyzed.Furthermore,a voltage-based frequency control(VFC)method is proposed,which uses voltage-assisted frequency modulation on the basis of traditional frequency regulation method,therefore the impact of large disturbance on the microgrid frequency is reduced.An typical example is established in the DIgSILENT/PowerFactory software,the simulation results show that the strategy can improve the microgrid’s frequency regulation capability and the economics of frequency regulation.
作者
赵晶晶
屈靖雅
ZHAO Jing-jing;QU Jing-ya(School of Electric Power Engineering,Shanghai University of Electric Power,Shanghai 200090,China)
出处
《水电能源科学》
北大核心
2020年第11期195-198,177,共5页
Water Resources and Power
关键词
孤岛微电网
一次调频
电压调节
负载电压静态特性
islanded microgrid
primary frequency control
voltage regulation
load voltage static characteristics
