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级联式储能系统中电池自均衡控制策略研究

, PP. 442-449

Keywords: 组合级联式储能系统,电池SOC自均衡,移相SPWM控制,特征谐波消除PWM

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Abstract:

针对独立电池供电的组合级联式储能系统中电池SOC不均衡问题,基于特征谐波消除PWM方法提出了一种新的差异化充放电控制策略。当检测到各电池SOC不均衡时,采用差异化充放电控制使各电池SOC趋于一致;当电池SOC达到均衡时,切换到同步充放电的移相SPWM控制。该方法提高了整个组合级联式储能系统的可用率和储能系统的有效容量,改善了储能系统的电能质量。文中推导了差异化充放电控制方法的原理,给出了切换条件。在PSCAD/EMTDC中建立了组合级联式储能系统模型,验证所提出的电池自均衡控制策略的有效性。

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