Keywords
power coordination, PV-ESS unit, active distribution network, distributed control, consensus algorithm
Abstract
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.
DOI
10.19781/j.issn.1673-9140.2022.02.017
First Page
147
Last Page
155
Recommended Citation
ZHANG, Keyong; WANG, Guanrui; GENG, Xin; JIA, Zihao; LI, Xiaohang; and SHEN, Yatao
(2022)
"Distributed cooperative control strategy for grid-connected power in ADN with high proportion of PV-ESS units,"
Journal of Electric Power Science and Technology: Vol. 37:
Iss.
2, Article 17.
DOI: 10.19781/j.issn.1673-9140.2022.02.017
Available at:
https://jepst.researchcommons.org/journal/vol37/iss2/17