Since late June, most of China has ushered in the rainy season. With the country across the country to see the sea mode of open, wind, rain, debris flow, lightning ... ... once again the photovoltaic power plant safety issues pushed on the cusp.
Recently, a netizen broke the news, Jiangxi Jiujiang and a photovoltaic power plant in the past few days of heavy rain and flood test. According to insiders, the loss of power station reached 150KW, the direct economic loss of more than 200 million yuan. The worse is that the affected power station has just been built, not enough time on the insurance ... ...
In addition to Jiangxi Jiujiang, including Jiangsu and Zhejiang, Xinjiang, Guangxi and other parts of the country will usher in the vast rainy season, in the face of the extreme weather, we complained that Xu Daguan once again relaxed his wife's custody, in fact, there are many Things can be done, at least clumsy of power station safety issues can once again put on the agenda.
First of all, of course, is to choose the appropriate photovoltaic insurance:
Ground photovoltaic power station
Natural disasters: tornadoes, lightning, storms, floods, blizzards, ice, ice and snow, hail, and so on. All the risks are: insurance or electrical accidents; non-mechanical or electrical accidents such as fire, explosion, flying objects falling; , Freezing rain, debris flow, collapse, sudden landslides caused by property damage.
2, indirect loss insurance: operational disruptions and additional costs Insurance: Underwriting natural disasters, accidents and other indirect losses caused by the operation of photovoltaic power plants, including the expected generation of electricity and subsidies and the increase in fixed costs.
Home photovoltaic system
With the home PV market in 2017 to promote, many insurance companies such as Pacific Insurance, China Life Insurance and other companies have set up home appliances for photovoltaic products, in the power plant design, please consult the relevant personnel.
Second, the site is the first off
A number of industry veteran who have stressed to reporters, careful location is the beginning of the design of photovoltaic power plants is more important part, especially for the significance of the ground power station is particularly prominent.
The first-line construction staff from Yingli suggested that the site should take into account the administrative requirements, sunshine resources and climatic conditions, hydrological conditions, air quality, transportation conditions and power transmission conditions. In the hydrological conditions to consider the short-term large rainfall, water depth, flood water level and drainage conditions. In addition, with the Jiujiang damaged power plant associated with the need for additional drainage protection system, in the heavy rainfall may be temporary temporary drainage facilities, and resolutely avoid the construction of power plants in the flood discharge area. At the same time, the construction workers to remind reporters, in addition to ground power plants, drainage protection system for the installation of the roof of the home photovoltaic power generation system is also important.
Third, the choice of quality assurance of quality equipment and accessories
Jiujiang from the power plant can be seen in the picture, the loss of mostly from the variants of the bracket, the wind resistance of the stent is not enough to lead to water equipment components. In addition to wind, snow pressure, earthquakes, hail ... ... and other extreme weather conditions are an important indicator of the strength of the test stent. In addition, the height of the bracket, the arrangement of pitch ... ... is also the power plant design needs to focus on the consideration of the project.
In addition to the stent, the other is a very easy to trigger the power station equipment is the inverter. In May, a 'Shanxi owners use low-quality inverter led to the roof of the photovoltaic power plant fire,' the news detonated photovoltaic friends circle, although the brand side, construction side, the media, third-party testing agencies ... ... and other field research, found dangerous Before we guess 'due to the use of low-voltage inverter caused by direct current arc, resulting in internal device spontaneous combustion', but from the spherical lightning caused by roof fire, with the inverter or even the entire photovoltaic system has nothing to do, but still can not eliminate people's Inverter safety concerns. In fact, the traditional inverter input voltage up to several hundred volts or even thousands of volts, in the installation, operation and maintenance process encountered lightning, it is easy to lead to DC drawing arc, causing a fire. To solve this security loophole, foreign experience is to try to use micro-inverter, Wang Sicheng and other industry experts are called to use the quality of the protection of large brand products.
In addition, the Central Dorset's head Ding Ke stressed the poor connectors and junction box hazards, he said, 'caused more than 70% of the power plant failure,' the culprit is the connector of the power station to use more small parts. Some small brand of connectors due to material reasons, the plastic easily aging, resulting in joints can not be inserted, causing short circuit and fire.
