For active distribution networks (ADN) with a high proportion of photovoltaic-energy storage system (PV-ESS) units, a distributed coordinated control strategy is proposed to track the power reference value at the grid connection point (PCC) in this paper. The voltage violations caused by the mismatch between photovoltaic output curves and local load curves can be mitigated. Firstly, the strategy generates the reference value of the change in the PV-ESS units' load rates based on the power difference between the reference value and the actual value at the distribution network PCC. Then, a pining consensus algorithm is utlized to adjust the active/reactive load rates of ESS and inverter. A proportional based power distribution is achieved and the power at the PCC of ADN can track the reference value. In addition, an average consensus algorithm is introduced to calculate the average SOC of the system, and each ESS corrects the power reference according to its SOC to achieve the balanced control of SOC. Finally, a simulation ADN system containing PV-ESS units is built in Matlab/Simulink software to verify the effectiveness of the proposed strategy.
张克勇,王冠瑞,耿新,贾子昊,李晓航,申亚涛.含高比例光—储单元的主动配电网并网功率分布式协同控制策略[J].电力科学与技术学报,2022,(2):147-155. ZHANG Keyong, WANG Guanrui, GENG Xin, JIA Zihao, LI Xiaohang, SHEN Yatao. Distributed cooperative control strategy for grid-connected power in ADN with high proportion of PV-ESS units[J]. Journal of Electric Power Science and Technology,2022,(2):147-155.复制