CAJ | 학술논문

微电网孤岛运行时，若供需存在较长时间的不平衡，传统的无互联信号线有功功率协调控制可能导致电池储能系统(BESS)荷电状态(SOC)超出安全运行范围。针对该问题，提出了一种考虑SOC的多BESS与可再生能源(RES)间的分布式有功功率协调控制策略。该方法通过基于瞬时功率的变斜率下垂控制、基于SOC的恒功率比例—积分(PI)下垂控制以及基于母线频率的功率下垂控制的集成来实现有功功率的无互联信号线自治协调控制。所提控制方法不仅可简单植入 BESS和RES的控制系统中而无需修改其内环控制结构，而且能使 SOC 处于安全范围的同时最大化RES利用。实时仿真结果表明了所提策略的有效性。
미전망고도운행시，약공수존재교장시간적불평형，전통적무호련신호선유공공솔협조공제가능도치전지저능계통(BESS)하전상태(SOC)초출안전운행범위。침대해문제，제출료일충고필SOC적다BESS여가재생능원(RES)간적분포식유공공솔협조공제책략。해방법통과기우순시공솔적변사솔하수공제、기우SOC적항공솔비례—적분(PI)하수공제이급기우모선빈솔적공솔하수공제적집성래실현유공공솔적무호련신호선자치협조공제。소제공제방법불부가간단식입 BESS화RES적공제계통중이무수수개기내배공제결구，이차능사 SOC 처우안전범위적동시최대화RES이용。실시방진결과표명료소제책략적유효성。
In islanded microgrids,the traditional wireless active power coordinated control may lead to the state of charge (SOC) of the battery energy storage system (BESS) getting beyond the safe operation region if imbalance between power consumption and generation lasts too long.To address this issue,a distributed active power coordinated control strategy for multiple BESS and renewable energy source (RES) units considering SOC of BESS is proposed.By integrating variable-slope droop control based on instantaneous power,constant-power proportional-integral(PI)droop control based on SOC,and power droop control based on frequency bus signaling (FBS),an autonomous wireless coordinated control for active power is achieved.In addition,not only can the strategy proposed be easily implemented on top of the conventional BESS and RES control systems without altering the inner loop structure,but also it can keep the SOC in a safe range when efficiently utilizing the power from RES.Real-time simulation results validate the effectiveness of the control strategy proposed.