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考虑储能充放电功率限制的并网光储虚拟同步机控制
作者:
作者单位:

1.电力传输与功率变换控制教育部重点实验室(上海交通大学),上海市 200240;2.国网上海市电力公司,上海市 200120

摘要:

光储虚拟同步机正常工作时,其输出功率跟踪指令值,光伏进行最大功率跟踪,通过储能消除光伏出力与虚拟同步机功率指令之间的偏差,抑制逆变器输出功率波动。而光伏具有波动性与不确定性,光伏功率波动超出储能调节能力时,会使直流母线电压出现较大偏移,影响虚拟同步机运行的稳定性。针对上述问题,提出了考虑储能充放电功率限制的并网光储虚拟同步机控制方法。根据储能荷电状态,对逆变器、光伏和储能进行协调控制。在储能充放电功率达到上限时,抑制并消除了直流母线电压偏移。在充分利用储能调节能力支撑虚拟同步机功率跟踪需求的同时,避免了储能的过放和过充,实现了光储虚拟同步机系统的安全稳定运行。PSCAD/EMTDC中的仿真和半实物仿真验证了所提出控制策略的有效性。

关键词:

基金项目:

国家自然科学基金资助项目(51477098);国家电网公司科技项目(17H1000000423)。

通信作者:

作者简介:

高建瑞(1996—),男,硕士研究生,主要研究方向:新能源发电虚拟同步控制。E-mail:gaojianrui@sjtu.edu.cn
李国杰(1965—),男,通信作者,教授,博士生导师,主要研究方向:新能源控制与接入、微电网分析与控制。E-mail:liguojie@sjtu.edu.cn
汪可友(1979—),男,教授,博士生导师,主要研究方向:电力能源系统建模与计算、电力电子化系统电磁暂态实时仿真。E-mail:wangkeyou@sjtu.edu.cn


Control of Grid-connected PV-Battery Virtual Synchronous Machine Considering Battery Charging/Discharging Power Limit
Author:
Affiliation:

1.Key Laboratory of Control of Power Transmission and Conversion (Shanghai Jiao Tong University),Ministry of Education, Shanghai 200240, China;2.State Grid Shanghai Municipal Electric Power Company, Shanghai 200120, China

Abstract:

During the normal operation, the output power of the photovoltaic-battery virtual synchronous machine (PV-battery VSM) tracks its power command, and the PV panel operates at the maximum power point. The deviation between the PV power and the power command is eliminated by the battery power, which suppresses the power fluctuation of the inverter. However, the PV power is fluctuant and uncertain. When the PV power fluctuation exceeds the battery power limit, it will lead to a large DC bus voltage offset and affect the stable operation of the VSM. Control methods for the grid-connected PV-battery VSM considering the battery charging/discharging power limit are proposed to solve the problems above. The inverter, the PV and the battery are controlled coordinately based on the state of charge (SOC) of the battery. The DC bus voltage offset is suppressed and eliminated when the charging/discharging power of the battery reaches the upper limit. The battery is fully utilized for the VSM output power to track the power command, and over-charging/over-discharging of the battery is avoided. The PV-battery VSM system can operate safely and stably. The proposed control methods are verified by simulations based on PSCAD/EMTDC and semi-physical simulations.

Keywords:

Foundation:
This work is supported by National Natural Science Foundation of China (No. 51477098) and State Grid Corporation of China (No. 17H1000000423).
引用本文
[1]高建瑞,李国杰,汪可友,等.考虑储能充放电功率限制的并网光储虚拟同步机控制[J].电力系统自动化,2020,44(4):134-141. DOI:10.7500/AEPS20190515010.
GAO Jianrui, LI Guojie, WANG Keyou, et al. Control of Grid-connected PV-Battery Virtual Synchronous Machine Considering Battery Charging/Discharging Power Limit[J]. Automation of Electric Power Systems, 2020, 44(4):134-141. DOI:10.7500/AEPS20190515010.
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  • 收稿日期:2019-05-15
  • 最后修改日期:2019-06-17
  • 录用日期:2019-06-17
  • 在线发布日期: 2020-02-29
  • 出版日期:
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