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首页> 外文会议>International Conference on Electronics Technology >SOC Balancing Control Strategy Based on Piecewise Adaptive Droop Coefficient Algorithm for Multi-energy Storage Units in DC Microgrid
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SOC Balancing Control Strategy Based on Piecewise Adaptive Droop Coefficient Algorithm for Multi-energy Storage Units in DC Microgrid

机译：基于分段自适应下垂系数算法在DC微电网中多能量存储单元的分段自适应下垂系数算法的SoC平衡控制策略

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摘要

In order to achieve the state of charge (SOC) balancing among multiple energy storage units in an islanded DC microgrid, the SOC balancing control strategy of multi-energy storage based on a piecewise adaptive droop coefficient algorithm is proposed. The proposed algorithm dynamically adjusts the droop coefficient according to the lithium battery SOC deviation. When the SOC deviation is large, the droop coefficient is adjusted so that the lithium battery that has a high (low) SOC when discharging (charging) is discharged (charged) with the maximum power. Simultaneously, another lithium battery is controlled to make up the remaining power, so the SOC balancing is accelerated. When the SOC deviation is small, the droop coefficient is optimized based on the different line impedance and the real capacity to realize the SOC balancing control. The voltage automatic recovery control is adopted to realize the non-difference of bus voltage and stabilize the bus voltage and improve the power supply quality. Finally, simulation is implemented in MATLAB/Simulink for verification. The simulation results show that the proposed control strategy can rapidly balance the SOC of multiple energy storage units and maintain the stability of the bus voltage.
机译：为了实现岛立DC微电网中多个能量存储单元之间的充电状态（SOC），提出了基于分段自适应下垂系数算法的多能量存储的SoC平衡控制策略。所提出的算法根据锂电池SOC偏差动态调节下垂系数。当SOC偏差大时，调节下垂系数，使得当放电时具有高（低）SOC的锂电池被排出（充电），以最大功率排出（充电）。同时，控制另一个锂电池以构成剩余功率，因此SOC平衡加速。当SOC偏差小时，基于不同的线路阻抗和实现SOC平衡控制的实际容量来优化下垂系数。采用电压自动恢复控制来实现总线电压的非差异，并稳定总线电压并提高电源质量。最后，在MATLAB / SIMULINK中实现了模拟以进行验证。仿真结果表明，所提出的控制策略可以快速平衡多个能量存储单元的SOC并保持总线电压的稳定性。

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