CAJ | 학술논문

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.
제출일충축전지화허의저능적협조공제책략,용우유효평억미망련락선공솔파동.수선,침대전열빙가공부하적군체특성,인입일충표식우선렬표공구,용우구건부하수구향응허의저능모형;재기공제책략설계시,류비우전지적하전상태,인입일충허의저능상태표식CT,용우묘술가공전열빙부하적군체가조능력.진일보,제출일충가변려파시간상수적미망련락선공솔파동공제책략,통과위허의저능화전지저능계통설치량충불동시간상수적파특옥자려파기,실현기분별평억미망련락선공솔파동중적고빈화저빈성분;동시통과허의저능화전지저능적우화협조,기가보증삼여부하수구향응용호적서괄성,우능유효감소전지저능적충방전빈차,피면기과충과방정황발생,종이연장전지사용수명.
A coordination control strategy of battery and virtual energy storage based on demand response (DR) to smooth the micro-grid (MG) tie-line 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 indexCT 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.