Polaris Solar Photovoltaic Network
: Not long ago, the General Administration of Quality Supervision, Inspection and Quarantine issued the Announcement on the Quality Status of Products under National Supervision and Spot Inspection in 2015, showing thatphotovoltaic grid-connected inverter
The qualified rate of spot checks is less than 80%. This time, a total of 55 batches of photovoltaic grid-connected inverter products produced by 55 enterprises in 13 provinces and municipalities including Beijing, Hebei, Shanghai, Jiangsu, Zhejiang, and Anhui were randomly selected.
"Compared with foreign inverter market, domesticphotovoltaic inverter
Industry concentration is low. In terms of quality and technology, due to the late start-up of the terminal market, domestic photovoltaic inverter manufacturers are generally small in scale, and there is a certain gap between the structure, process, performance stability and other indicators with foreign first-class enterprises. however, some domestic leading enterprises have achieved rapid development and have entered the markets of Europe, America, Southeast Asia and other foreign markets." Lu Chenyu, assistant president of China Electrical Appliance Industry Association, said.
Wang Aiguo, executive deputy director of the Shanghai Electrical Equipment Testing Institute, said that the performance indicators of photovoltaic grid-connected inverters are directly related to the quality of power used by users. There are many possible reasons for the unqualified inverter products, including the control mode of software, the circuit design of hardware, the quality of the key components used, etc., will affect the performance of the product.
"At present, the spot check mainly involves the performance of the inverter and the grid connection index. The unqualified index will affect the power generation and power quality of the photovoltaic power station." Li Weichun, General Manager of Greater China of Germany's Rhine TüV Solar and Fuel Cell Division, said.
"From the perspective of standardization of China's photovoltaic industry, there are many industries involved, covering solar energy resource forecasting and evaluation, photovoltaic power plant design and other industries. The continuous updating of technology and the year-on-year decline in costs have promoted the rapid development of the photovoltaic industry, and standards also need to carry out a series of 'formulation-implementation-revision' work in accordance with the technological 'innovation-application-re-innovation' process." Wang Aiguo said.
Lu Chenyu revealed that the China Electrical Appliance Industry Association has compiled and formed a standard system framework for photovoltaic power generation equipment in the photovoltaic field, covering 8 aspects such as photovoltaic modules, support components, control and protection devices, etc. At present, the revision of standards including photovoltaic modules, combiner boxes, control and protection has been organized.
In addition to the standard specifications, improving its own quality and technical level is also an urgent problem for photovoltaic inverters. "It's not that domestic manufacturers can't produce high-quality products, but that the lowest price winning bid for domestic projects causes manufacturers to sacrifice product quality to achieve price reduction." Li Weichun suggested that the whole industry should put an end to the lowest price winning projects, win by quality, and ensure reliable and stable power generation of photovoltaic power stations for 25 years. At the same time, the evaluation criteria and system of product quality should be optimized accordingly, and the evaluation mechanism based on the cost of electricity should be guided with reference to the successful experience of foreign countries.