If photovoltaic power generation systems don't work, how would you check yourself?

Familiar with photovoltaic partner knows, photovoltaic power plant can run 20 - in theory 25 years, but even design and installation are good, very professional, long running will inevitably appear problem, so the master certain troubleshooting is quite necessary. Such as

familiar with photovoltaic technology partners know, photovoltaic power plant can run 20 - in theory 25 years, but even they will have a good design and installation, they are also very professional, inevitably there will be a problem in the process of long-term operation. Therefore, to master certain troubleshooting methods is very necessary. If your pv systems don't work, don't worry about it at this time, remember the photovoltaic power station does not work, there are two main reasons: one is the part of the equipment failure; The possibility of grid is a problem. 1. Find out the problem. Through the daily power check and monitoring software of the system, can clearly see whether systems don't work or performance is too low. The process should be performed in sunny day, so that you can test the output of the pv modules, and complete investigation under the enough sunshine time. 2. Need to check that the DC main circuit breaker, isolating device and the array ac main circuit breaker not disconnect. If all of the circuit breaker and isolating device is closed, should make visual inspection for the inverter. 3, inverter problem of frequency converter fault is very common in the system, after all, it is made up of many parts, frequency converter fault information often in the form of false information, the mainstream of the inverter in the market now can have fault feedback function, when the failure frequency converter alarm lamp will light up. According to the frequency converter of alarm information, can find the corresponding problems in frequency converter operation manual processing method. If the above method is still can't solve the problem, should contact the manufacturer. Of course, most of the time inverter alarm is not its own problems, it may be network problems, it may be parts problem. 4, troubleshooting. Of the main causes of component failure is: cable disconnected or the plug failure; Pv junction box internal loose connection; Photovoltaic module is broken. Actual fault by physical examination of the cables and components and current and voltage measurements to find. Photovoltaic array troubleshooting are a few basic understanding: 1. Open circuit voltage and short circuit current measurement only in pv module did not load. 2. Even when the solar irradiance is very low, the output voltage of pv module was close to the open circuit voltage, and short circuit current proportional to the effective solar irradiance. 3. According to the situation of blocking, blocked pv module output current or reduce the current. Here we focus on the following two points: 1. If the DC side of the inverter fault occurs, the first task is to measure the inverter input the open circuit voltage of pv arrays, and confirm whether DC power reaches the inverter. If there is no DC power converter, technical personnel should inspect all equipment and its connection system. Detection process starting from the inverter, ends with a photovoltaic array. 2. There are a lot of knowledge and more self troubleshooting on pv systems. After the completion of photovoltaic power station, the user can form a good habit of operation and maintenance, regular inspection station, accumulated some simple troubleshooting methods. Related problems, they can handle and solve. If you can't solve the problem, you can contact the manufacturer, and professional service personnel to guide the solution.