考虑最低惯量需求的海上风电与海岛微网频率交互控制策略

Interaction Frequency Regulation Strategy Between Offshore Wind Farm and Island Microgrids Considering Minimum Inertia Requirement

海岛微网在与海上风电频率交互控制过程中,海岛微网惯量充裕度处于时变状态,当发生联络线中断等故障后,将严重影响微网运行稳定性。因此,在海上风电与海岛微网交互调频策略基础上,为确保交互调频过程中海岛微网的安全稳定运行,进一步提出了考虑最低惯量需求的海上风电与海岛微网频率交互控制策略。首先,基于珠海万山海岛微网群国家级示范项目,构建海岛微网最低惯量需求评估体系;然次,通过遗传粒子群算法求解微网最低惯量需求,精细化微网惯量支撑稳定裕度,约束海岛微网对海上风电的惯量调控水平;最后,通过算例仿真分析极限扰动及故障下海岛微网的频率响应特性。

During the process of the interactive frequency regulation between offshore wind farm and island microgrids,the suf⁃ficiency of the inertia level of island microgrids is in a time-varying state,which will seriously affect the stability of microgrid running after the faults,such as the tie-line interrupt.In order to ensure the safe and steady operation of island microgrids in the process of the interactive frequency regulation,this paper further proposes the interactive frequency regulation strategy which takes minimum inertia requirement into accout on the basis of the interactive frequency regulation strategy between offshore wind farm and island microgrids.Firstly,based on the national demonstration project of Wanshan island renewable energy microgrid in Zhuhai,the assess⁃ment system of minimum inertia requirement of island microgrids is built.Secondly,minimum inertia requirement of island microgrids is solved by genetic algorithm and particle swarm optimization(GAPSO).The stability margin of the inertia supporting of the island microgrids is refined.The inertia control level of island microgrid on offshore wind field is constrained.Finally,the frequency response characteristics of island microgrid are analyzed under severe disturbance and faults by the example simulation.