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| Local-distributed voltage optimization control method for photovoltaics and energy storage in a smart distribution network considering time delay |
| DOI：10.19783/j.cnki.pspc.240356 |
| Key Words:high proportion photovoltaic energy storage regulation voltage optimization consistency algorithm communication delay |
| Author Name | Affiliation | | GE Leijiao1 | 1. School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
2. State Grid Tianjin
Electric Power Company Research Institute, Tianjin 300384, China
3. School of Automation and
Electrical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China | | CUI Qingxue2 | 1. School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
2. State Grid Tianjin
Electric Power Company Research Institute, Tianjin 300384, China
3. School of Automation and
Electrical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China | | LI Changlu1 | 1. School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
2. State Grid Tianjin
Electric Power Company Research Institute, Tianjin 300384, China
3. School of Automation and
Electrical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China | | LI Xiaoping3 | 1. School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
2. State Grid Tianjin
Electric Power Company Research Institute, Tianjin 300384, China
3. School of Automation and
Electrical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China |
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| Abstract:The high proportion and strong randomness of photovoltaic (PV) systems being dispersed and disorderly integrated into smart distribution networks often lead to node voltage violation. Additionally, communication delay between control objects during voltage regulation further increases the difficulty of voltage optimization control in smart distribution networks. To address this issue, this paper proposes a local distributed coordinated control strategy for PV and energy storage, considering the influence of time delay. First, the reactive power regulation capability of PV inverters is analyzed to determine the reactive power output limit for local control, and a distributed consistency factor is introduced to construct a local distributed control strategy for distribution networks with high PV penetration. Furthermore, combined with the active power regulation capability of energy storage, a local distributed voltage optimization control model for PV and storage coordination without considering time delay is proposed. Then, considering the impact of communication delay, a consensus protocol is established to couple the algorithm with communication delay, and a time-delay local distributed voltage optimization control model for storage coordination is constructed. The stability margin of the time-delay model is solved using linear matrix inequality, and the delay model is then used for compensation control. Finally, an improved IEEE 33-bus system is used for numerical verification. The results show that after applying the proposed method for communication delay compensation, network losses and voltage deviations are reduced by 23.01% and 20.52%, respectively, demonstrating the superiority of the proposed method. |
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