光伏蓄电池的Soc估计及检测方法

SOC Estimation and Detection Method of PV Battery

现如今光伏系统光伏控制器普遍采用PWM方式对光伏蓄电池充电,由于太阳能充电器是从光伏面板取得能量,而光伏面板的输出功率、电压、电流受环境和光照的影响较大,输入变量不稳定,所以很难在输入控制上做更多的改变。确保延长光伏蓄电池使用寿命并使其稳定地运行,需要对光伏蓄电池的荷电状态(SOC)实时监控和测量,准确估算蓄电池工作状态。提出了一种先上线检测再电流置零混合式方法检测光伏系统光伏蓄电池荷电状态。介绍了该检测方法的原理及实现过程。实际情况表明:该检测方法测量精度高,具有良好的使用价值。

Now PV controller of PV system generally uses PWM way on battery charging,because solar charger obtains energy from PV panel,which output power,voltage and current are greatly influenced by environment and light,input variables are unstable,so it＇ s difficult to make more changes to input control.In order to improve PV battery life and guarantee its reliable operation,state of charge（SOC） of PV battery needs to be realtime monitored and measured to ensure that the battery is in top working condition.A hybrid way to firstly online detect and then set zero current is proposed to detect SOC of PV battery of PV systems.The principle and the implementation process of the detection method are introduced.Reality shows that the detection method has high accuracy and good use value.