Grid-connected inverter for commercial rooftop solar photovoltaic power generation systems

How to choose an inverter for a photovoltaic system in Nanjing?

       Select an inverter of the corresponding power range based on the system requirements. The power of the chosen inverter should match the maximum power of the photovoltaic array. Generally, the rated output power of the photovoltaic inverter should be close to the total input power to save costs. Grid-tied inverters are critical equipment in photovoltaic power generation systems, playing a pivotal role in the conversion efficiency and reliability of the system. The main technical principles for inverter selection are as follows:

(1) Reliable performance and high efficiency:

Photovoltaic power generation systems currently have high power generation costs. If the inverter consumes too much energy or fails during operation, it will inevitably lead to a loss in total power generation and reduced economic efficiency of the system. Therefore, the inverter must be reliable and highly efficient, capable of outputting maximum power (MPPT) based on the current operating conditions of the solar panels.

(2) Wide adaptability range for DC input voltage:

Since the output voltage of solar panels varies with sunlight intensity, weather conditions, and load, the inverter must operate normally within a wide range of DC input voltages and ensure stable AC output voltage.

(3) Maximum Power Point Tracking (MPPT):

The input resistance of the inverter should adapt to the actual operating characteristics of the photovoltaic power generation system to ensure the system operates at the maximum power point.

(4) Low waveform distortion and high power factor:

When large-scale photovoltaic power generation systems are connected to the grid, to avoid polluting the public grid, the inverter must output a sinusoidal waveform. The current waveform must be consistent with the external grid, with waveform distortion less than 5%, higher harmonic content less than 3%, and a power factor close to 1.

(5) Protection functions:

Grid-tied inverters should also have protection functions such as AC overvoltage and undervoltage protection, overfrequency and underfrequency protection, high-temperature protection, AC and DC overcurrent protection, DC overvoltage protection, and anti-islanding protection.

(6) Monitoring and data acquisition:

The inverter should have multiple communication interfaces for data acquisition and transmission to a remote control room. Its controller should also have analog input ports to connect with external sensors for measuring data such as sunlight and temperature, facilitating data processing and analysis for the entire power station.

      Jiangsu Mangzhong Construction Co., Ltd. is a comprehensive energy service provider specializing in the photovoltaic field, dedicated to photovoltaic power plant investment, development, design, construction, intelligent operation and maintenance, professional consulting services, and photovoltaic power plant equipment recycling as a smart energy enterprise.

Company Name: Jiangsu Mangzhong Construction Co., Ltd.

Business Scope: Photovoltaic power plant EPC and photovoltaic solar power plant investment

Company Landline: 025-5888 3737

Mobile Number: 159 5163 4545

Company Website: http://www.mangz.cn