基于分布式储能谐波阻抗调节的微网电压控制

Microgrid Voltage Control Based on Harmonic Impedance Regulation of Distributed Energy Storage

孤岛微网的电能质量问题受到越来越广泛的关注,利用孤岛微网分布式储能的特性对网内谐波进行优化控制是治理微网电能质量问题的有效途径。首先建立了分布式储能发电单元(DG)机组容量/谐波阻抗下垂关系,基于电压型控制策略(VCM)的DG等效谐波阻抗调节方法,给出了基于DG的孤岛微网谐波优化控制方案,最终实现了微网内DG对非线性负载引入的谐波功率均分,以及对公共耦合点(PCC)电压谐波的治理和稳定控制。最后通过系统仿真与动模实验验证了所提控制方案的有效性。

The power quality problem of isolated island microgrid is attracting more and more attention.It is an effective way to deal with the power quality problem of isolated island microgrid to optimize the harmonics by using the distributed energy storage characteristics of isolated island microgrid.Firstly,the capacity/harmonic impedance sag relationship of distributed energy storage generation unit(DG)is established,with the equivalent harmonic impedance regulation method of DG based on voltage control method(VCM),the harmonic optimization control scheme of isolated island microgrid based on DG is presented.And the harmonic power distribution of nonlinear load introduced by DG in the microgrid is realized,and the deal and stable control of point of common coupling(PCC)voltage harmonics are realized.Finally,the effectiveness of the proposed control scheme is verified by system simulation and dynamic model experiment.