Solar photovoltaic (pv) application of photovoltaic power station total trip? Four types of reasons should know!

Because there is a contact and circuit breaker, is also a heating source. Solar photovoltaic net news: in a photovoltaic system, electrical switch role mainly has two aspects: one is electrical isolation function, when installation and maintenance, solar portal, cut the photovoltaic modules, solar power network, inverter, power distribution cabinet and electrical connection between the grid, to the operating personnel to provide a safe environment, this action by the operating personnel take the initiative to implement; When the pv system, therefore, if there is a switch trip, the reason is that the switch may appear over current, over voltage, over temperature, the leakage current, the analysis of the causes of each case solution. Photovoltaic (pv) with closed cooling circuit breaker installation place environment is bad. Miniature circuit breaker, which has two kinds of type C and type D, this is tripping types, the difference between C and D are different short circuit instantaneous tripping current, overload protection is the same. This kind of failure is more common, rated current of the circuit breaker tagging, is the device under the condition of temperature is 30 degrees can long-term through the maximum current, temperature rise every 10 degrees current reduced by 5%. Among them, the EPC project owner units is given priority to with soe/state, this also reflected from the side, in project bidding and parity, the state-owned enterprises have become the absolute main force. Second, when the pv system's power is greater than the load electricity power, inverter to improve voltage electric transmission. The article content is for reference only. Design, photovoltaic applications must first calculate the maximum current of the circuit, rated current of the switch 1 to exceed the maximum current of the circuit. 1 to 1. 2 times. C type magnetic tripping current for ( 5 - 10) In, that is, when the current 10 times the rated current tripping, action time less than or equal to 0. 1 second, China solar energy network, solar energy, apply to protect the normal load. The cause of circuit breaker high temperature has two kinds: one is the circuit breaker and cable poor contact, or the circuit breaker itself touch point contact is bad, internal resistance is big, solar power grid, China's top ten silicon company cause temperature rise of circuit breaker; The reason may have two kinds: one is open circuit of rated voltage type choose the wrong;

this fault, the most common circuit breaker selection is too small or quality closes nevertheless. Second, the security protection function, when the electrical system of over current, over voltage, short circuit, over temperature and the leakage current, polysilicon prices can automatically cut off the circuit, in order to protect the personal and equipment safety, this action is switch automatically. This paper statistics the September to today issued a total of 2. 85 gw pv power plant EPC and 1. 9 gw component bid opening information. When switching back and forth with transformer electrical equipment, such as photovoltaic power use after a shock current, silicon should choose D type breaker, if there is no transformer lines such as perceptual equipment, polysilicon prices suggest choose C type circuit breaker. If it is a new installation of power plant, is likely to be improper switch selection, circuit, defective insulation transformer insulation fault, etc. Solar photovoltaic (pv) network statement: this information is reproduced from the media or other Internet web site, network cooperation photovoltaic applications solar photovoltaic network published the article for the purpose of the information, does not mean that agree with his point of view or confirm its description. Specifically, CGNPC in development of 410 mw, 603 mw, guangzhou energy saving 220 mw, 345 mw, jin can group the people vote for 200 mw, 190 mw hubei energy group, huaneng power switch trip incident of 180 mw photovoltaic system, if it is installed more power stations, the reasons might be the circuit wiring or switch the aging problems. Type D magnetic tripping current for ( 10 - 20) In, that is, when the current 20 times the rated current tripping, action time less than or equal to 0. 1 second, be applicable to the protection has very high impact current equipment. This kind of failure is more rare, circuit breaker, between two phase have a rated voltage, general monopole is 250 v, if the voltage could trip over.