基于多因素的储能系统剩余电量估计方法

Estimation Method for Residual Capacity of Energy Storage System Based on Multi-factor

蓄电池的电量是储能系统的关键运行参数,决定储能系统的正常运行。为准确估计蓄电池的电量,减小估计误差和波动幅值,在蓄电池传统电量估计方法的基础上,提出了一种基于蓄电池电动势内阻和端电压加权组合与安时法修正的多因素分阶段电量估计新方法。在铅酸蓄电池、储能逆变充放一体机所组成的储能系统上分别对传统电量估计方法、电动势内阻和端电压加权组合法、电动势内阻和端电压加权组合与安时法修正的多因素分阶段电量估计法进行了实验,并将实验结果进行比较分析,发现电动势内阻和端电压加权组合与安时法修正的多因素分阶段电量估计法的电量估计最大误差绝对值为2.23%,且误差波动幅值标准方差为0.838 5,表明该方法可以实现储能系统铅酸蓄电池电量的精确估计,验证了其有效性。

Battery capacity is the critical operational parameter of the energy storage system runs normally or nol. In order to accurately estimate battery capacity and reduce estimation errors and fluctuationamplitudes , this paper presents a kind of multi-factor staged capacity estimation method considering electromotive force , re-sistance and terminal voltage weighted combination with ampere-hour correction on the basis of traditional battery capacity estimation methods. By making experiments with the traditional capacity estimation method , the electromotive force , resisi- ance and terminal voltage weighted combination method and the proposed new method on the energy storage system com-posed of lead-acid battery , inverter charge and discharge machine , comparing and analyzing the experimental results , it dis-covers the maximum absolute error value of capacity estimation obtained by the new method is 2. 23 % and the standard devi-ation of error fluctuation amplitudes is 0. 838 5 ＆ which indicates that the proposed method can reathe lead-acid battery capacity of the energy storage system and verifies effectiveness of this