一种平抑微网联络线功率波动的电池及虚拟储能协调控制策略  

A Coordination Control Strategy of Battery and Virtual Energy Storage to Smooth the Micro-grid Tie-line Power Fluctuations

作　　者：王冉[1] 王丹[1] 贾宏杰[1] 杨占勇[2] 戚野白 范孟华[3] 盛万兴[2] 侯立睿[1] 

机构地区：[1]天津大学智能电网教育部重点实验室,天津市南开区300072 [2]中国电力科学研究院,北京市海淀区100192 [3]国网能源研究院,北京市昌平区102209

出　　处：《中国电机工程学报》2015年第20期5124-5134,共11页Proceedings of the CSEE

基　　金：国家863高技术研究发展计划(2014AA051901);国家自然科学基金项目(51377117,51407125,51361135704);国家电网公司基础性前瞻性科技项目--“能源互联网技术架构研究”;国家电网公司科技项目(EPRIPDKJ[2012]3185);国家社科基金重大项目(12&ZD208)~~

摘　　要：提出一种蓄电池和虚拟储能的协调控制策略,用于有效平抑微网联络线功率波动。首先,针对电热泵可控负荷的群体特性,引入一种标识优先列表工具,用于构建负荷需求响应虚拟储能模型;在其控制策略设计时,类比于电池的荷电状态,引入一种虚拟储能状态标识CT,用于描述可控电热泵负荷的群体可调能力。进一步,提出一种可变滤波时间常数的微网联络线功率波动控制策略,通过为虚拟储能和电池储能系统设置两种不同时间常数的巴特沃兹滤波器,实现其分别平抑微网联络线功率波动中的高频和低频成分;同时通过虚拟储能和电池储能的优化协调,既可保证参与负荷需求响应用户的舒适性,又能有效减少电池储能的充放电频次,避免其过充过放情况发生,从而延长电池使用寿命。A coordination control strategy of battery and virtual energy storage based on demand response （DR） to smooth the micro-grid （MG） tieAine power flow fluctuations was proposed in this paper. Firstly, an index-priority-list （IPL） was presented to construct the virtual energy storage model with considering the group characteristics of the thermostatically-controlled loads. Similar to the state of charge （SOC） in battery system, a state index CT was defined for the virtual energy storage system to describe its regulation capability. Secondly, a coordination control strategy to smooth the MG power flow fluctuations based on Butterworth filter with varying time constants was proposed. Two filters were introduced for virtual energy storage and battery system respectively. Their time constants can be automatically coordinated and adjusted so that virtual energy storage is used to smooth the high-frequency （fast） fluctuations, while battery system is used to balance low-frequency （slow） fluctuations.With the coordination strategy, MG tie-line power flow fluctuations can be effectively smoothed. At the same time, the comfort of the customers participating in the demand response can be maintained. The charging times of battery can be reduced and the over charging/discharging of battery can be avoided, so the battery life can be prolonged.

关 键 词：需求响应 虚拟储能 标识优先列表 微网联络线功率波动 荷电状态 温控负荷 

分 类 号：TM71[电气工程—电力系统及自动化]