Photovoltaic power generation system is a new energy system that uses solar energy to generate electricity, and the generator load bank is an important part of the photovoltaic power generation system. The generator load bank can achieve reactive power compensation by adjusting the current phase and voltage amplitude, thereby improving the efficiency and reliability of the photovoltaic power generation system.

In the photovoltaic power generation system, due to the instability of solar energy and the influence of weather, the output voltage and current of the photovoltaic battery group will fluctuate, thereby affecting the efficiency and reliability of the photovoltaic power generation system. The generator load bank can achieve reactive power compensation by adjusting the current phase and voltage amplitude, thereby eliminating the reactive current in the power system and improving the efficiency and stability of the photovoltaic power generation system.

The application of the generator load bank in the photovoltaic power generation system mainly includes the following aspects:

• Load simulation principle: The load bank mainly tests the performance of power supply equipment by simulating various actual loads. Its core is to use components such as resistors, inductors, capacitors, etc. to form different types of loads. For example, resistive loads are used to simulate purely resistive electrical equipment, such as electric heaters, etc., and the load size is adjusted by changing the resistance value; inductive loads can simulate devices with inductive characteristics such as motors, which will cause the current to lag behind the voltage; capacitive loads are similar to some electronic devices with capacitive characteristics, and the current will lead the voltage. By combining these different types of load components, various complex actual load conditions can be simulated.
• Power consumption and heat dissipation principle: The load bank consumes a lot of electrical energy when working, which is converted into heat energy. In order to ensure that the load bank can work normally and not be damaged due to overheating, a good heat dissipation mechanism is required. Common heat dissipation methods include natural heat dissipation, forced air cooling and water cooling. Natural heat dissipation relies on the device's own heat dissipation structure to dissipate heat into the surrounding environment, which is suitable for load banks with lower power; forced air cooling is to install a fan to accelerate air flow to remove heat, which is a common heat dissipation method for medium-power load banks; water cooling uses circulating water to cool the load bank, which has good heat dissipation effect and is suitable for high-power load banks.

In the industrial field, with the continuous rise of energy costs and increasingly stringent environmental protection requirements, energy saving and consumption reduction have become the key lifeline for the sustainable development of enterprises. As the core equipment in the power testing link, the energy-saving technology transformation of industrial load banks is not only related to the economic benefits of the enterprise itself, but also an important measure to help the entire industrial system move towards a green and low-carbon future.

Sunwin WN-HC Household Storage Inverter Test System




WN-HC Household Storage Inverter Test System is the best test system for grid-connected/off-grid inverters. It customizes and optimizes standard test items according to the characteristics of solar inverters, with good test efficiency and high test coverage.


The whole machine adopts modular design, which is simple to operate and maintain. It can test the parameters of various items of the inverter according to industry specifications to meet the detection needs of the inverter. It is an essential detection tool for inverter production workshops, laboratories, installation and commissioning, and scientific research and development. The hardware platform of the VILVA-HC household storage inverter test system can be flexibly matched, and different AC sources, DC sources, electronic loads, power analyzers, oscilloscopes, etc. can be selected. Grid-connected bidirectional power supplies can also be selected according to different cost requirements. The test system software application interface has editable test items and flexible adjustment of test parameters. It can realize the intranet sharing of test programs, and one person maintains the ATE platform corresponding to all production lines for product models. Automatically generate test reports. And the system reserves multiple communication ports for inverters.

Load Bank Maintenance and Calibration: Key Practices and Common Misconceptions to Extend Equipment Life

Load bank error analysis is an important task in electronic testing. It can help us understand the performance and accuracy of the load bank and find out the possible sources of errors so as to make corresponding calibration and corrections.

Data center

• Power requirements: Data centers usually have a large number of servers and other equipment. It is necessary to select a rack-mounted load bank with appropriate power according to the scale of the data center and the expected load peak. The power is generally large, ranging from tens of kilowatts to hundreds of kilowatts.

• Accuracy requirements: For power supply testing in data centers, the accuracy requirements are relatively high to accurately evaluate the performance of power supply equipment, such as the accuracy must reach ±0.5% or higher.

• Adjustment method: It is recommended to select a load bank with remote control and automatic adjustment functions to facilitate centralized control and automated testing by computer room managers in the monitoring room.

• Protection level: The data center environment is relatively good, and the general protection level of IP20 or above can meet the requirements.

WN-EV AC charging pile function test system is an efficient and comprehensive ATE test system designed for national standard, European standard and American standard charging pile production lines. It is an integrated platform for testing the entire three-gun AC charging pile. It is mainly used for testing on charging pile production lines. Its biggest advantage is that it can improve production efficiency for customers while ensuring product quality.

A load bank is a tool used to test transformers, which can simulate load conditions and measure the performance of the transformer. When using a load bank for transformer testing, you need to pay attention to the following aspects.

Choosing the right load bank for a specific power system application requires considering multiple aspects of the power system. Here are some key factors:
Load characteristics
Power requirements
Accuracy requirements
Control method
Other factors