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Method for detecting capacity leakage of capacitor in power conditioner, power conditioner performing the same, and photovoltaic power system provided with the same
Method for detecting capacity leakage of capacitor in power conditioner, power conditioner performing the same, and photovoltaic power system provided with the same
A capacity leakage of a capacitor (18, 19) in a power conditioner (3) of a photovoltaic power system is detected to continue or stop running of the system according to a degree of the capacity leakage. A method according to an embodiment of the invention for detecting the capacity leakage of the capacitor is a method for detecting the capacity leakage of the capacitor in the power conditioner (3) that performs power conversion of an output of a photovoltaic cell (1) to output an output power to the system side. The method for detecting the capacity leakage of the capacitor includes the steps of: detecting that the capacity leakage exists based on a voltage deviation of a charge voltage between both ends of the capacitor of a detection target of the capacity leakage; suppressing the output power when the detected capacity leakage is a capacity leakage in which the running can be continued by the output power suppression: and stopping the running of the photovoltaic power system provided with the power conditioner when the capacity leakage is a capacity leakage in which the running of the system cannot be continued even if the output power is suppressed,
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