Inverter, also called inverter power supply, is a converter device that converts DC power into AC power. Photovoltaic inverter is an inverter used in solar photovoltaic power generation system and is an important component in the photovoltaic system. The efficiency of the inverter affects the efficiency of the photovoltaic power generation system. The output voltage efficiency of Growatt's string inverter can reach up to %. Therefore, the selection of the inverter is very important. With the continuous development of technology, photovoltaic inverters will also develop in the direction of smaller size, higher efficiency and superior performance indicators. Below, experts from Growatt will share with you the working principle of solar inverters and its application in photovoltaic systems.
1. Working principle of solar inverter:
The core of the inverter device is the inverter switch circuit, referred to as the inverter circuit. This circuit completes the inverter function by turning on and off the power electronic switch.
2. Application of solar inverter in photovoltaic system:
Automatic operation and shutdown function
After sunrise in the morning, the intensity of solar radiation gradually increases, and the output of solar cells also increases. , when the output power required for the inverter operation is reached, the inverter automatically starts running. After entering operation, the inverter will monitor the output of the solar cell module at all times. As long as the output power of the solar cell module is greater than the output power required for the inverter to work, the inverter will continue to run until sunset and shut down, even if it is cloudy and rainy. The inverter can also operate. When the output of the solar cell module becomes smaller and the output of the inverter approaches, the inverter will enter a standby state.
Power tracking control function
The output of the solar cell module changes with the intensity of solar radiation and the temperature of the solar cell module itself (chip temperature). In addition, since the voltage of solar cell modules decreases as the current increases, there is an operating point where power can be obtained. The intensity of solar radiation is changing, and obviously the working point is also changing. Relative to these changes, the operating point of the solar cell module is always at the power point, and the system always obtains power output from the solar cell module. This control is called power tracking control. A feature of the inverter used in solar power generation systems is that it includes the function of power point tracking.
Growatt Solar Inverter Company is a national company focusing on the research and development, production, sales and service of new energy equipment such as solar grid-connected inverters, off-grid inverters, energy storage systems and their monitoring systems. high-tech enterprises. The hourly after-sales service system with global rapid response and product application cases in more than 10 countries around the world are deeply favored and trusted by customers. The strong performance in the domestic distributed inverter market has made the image of China's household inverters deeply rooted in the hearts of the people. Sincerely welcome domestic and foreign customers to call or write to discuss visits.
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