Method and apparatus of adjusting parameter for electrical device

An apparatus of adjusting parameter for an electrical device, the electrical device comprising a converter, the apparatus comprising:

• a metering circuit configured to calculate a performance evaluation parameter of the electrical device, when the converter using a parameter value table for running;
• a control unit configured to at least one parameter value in the parameter value table of the converter according to an input parameter so as obtain an optimized performance evaluation parameter of the electrical device and use the adjusted parameter value table corresponding to the optimized performance evaluation parameter for running;
• wherein when the control unit adjusts at least one parameter value in the parameter value table of the converter into different values, the metering circuit further configured to calculate the corresponding performance evaluation parameters of the electrical device, if the converter using the different adjusted parameter values for running;
• then the control unit further configured to compare the corresponding performance evaluation parameters and the performance evaluation parameter before adjusting and obtain the optimized performance evaluation parameter;
• wherein, the converter then updates the parameter value table with the adjusted parameter value which corresponds to the optimized performance evaluation parameter and uses the updated parameter value table for running.