IEC TS 63217:2021 Utility-interconnected photovoltaic inverters - Test procedure for over voltage ride-through measurements, was published on November 22.

It is the first IEC technical specification whose development was led by China Huaneng Group Co., Ltd, an energy producer in China. The working group responsible for the development was summoned by Niu Chenhui, an expert from Huaneng, and participated by experts from China, Switzerland, UK, America, German, South Africa, Japan, etc.

The IEC TS is a major breakthrough of Huaneng in international standardization work, which also fills the gap in standards for photovoltaic (PV) inverters connected to high voltage (HV) ride-through.

IEC TS 63217:2021 provides a test procedure for evaluating the performance of Over Voltage Ride-Through (OVRT) functions in inverters, which can be used in utility-interconnected PV systems and improve the stability of utility-interconnected PV systems.