Adaptive coordinated control method for distributed energy storage capacity with high proportion of photovoltaic access

doi:10.19799/j.cnki.2095-4239.2024.0196

Abstract

Abstract:

Photovoltaic power generation has certain volatility and uncertainty, weather, seasons and other factors will lead to changes in photovoltaic power, the energy storage system needs to track, forecast and adjust in real time to maintain the balance of supply and demand, but volatility and uncertainty increase the complexity of control. Therefore, a new adaptive coordinated control method for distributed energy storage capacity is proposed. Calculate the reactive power loss of energy storage after a high proportion of photovoltaic energy is added, and set power constraints to ensure power stability. Based on this, the optimal voltage condition, the lowest access load and net power, and the optimal power adjustable range at the high proportion photovoltaic access point are taken as the regulatory goals, and the adaptive coordinated control of distributed energy storage capacity of high proportion photovoltaic access is realized. Experimental data prove that the proposed method has significant advantages in terms of control effect, and can realize efficient distributed energy storage control and ensure efficient photovoltaic output.

Key words: high proportion of photovoltaic access, distributed energy storage capacity, active power, optimal power flow control model, network loss

CLC Number:

TP 258

Changfa LIU, Liheng FU, Zengli ZHANG, Hongsheng LI, Jingbin GU. Adaptive coordinated control method for distributed energy storage capacity with high proportion of photovoltaic access[J]. Energy Storage Science and Technology, 2024, 13(8): 2696-2703.

Figures/Tables 10

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高比例光伏接入类型	最大有功功率变化量/MW
高比例光伏接入类型	时间尺度1分钟	时间尺度10分钟
小型	装机容量0.2	装机容量/1
中型	装机容量/5	装机容量/2
大型	装机容量/10	装机容量/3

节点	光伏逆变器容量 /(kV·A)	储能系统容量 /kWh	光伏额定功率/kW	储能额定功率/kW
1	1	5.5	6	5
2	1	5.5	6	5
3	1	5.5	6	5
4	4	11	12	20
5	1	5.5	6	5
6	4	11.0	12	20

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