SOC estimation scheme of super capacitor based on Calman filter

The super capacitor is widely used in the energy storage system, such as photovoltaic, wind, solar and wind energy, etc. Complementary to the function of the battery, the fast charge and discharge. The general ampere hour method, load voltage method to estimate SOC, there is not ideal with the passage of time error more and bigger or the estimation error is relatively large. After the iterative calculation based on Calman filter algorithm, the calculation error is reduced to less than 5%.