Dummy Load Bank Test Of Solar Power Generation System
What happens during the solar power system dummy load bank test
It is a necessary project for the solar power plant to be put into operation after a comprehensive dummy load bank test. During the dummy load bank test, the solar system is fully powered on to confirm the safety and efficiency of equipment operation and ensure the normal operation of all inverters. Equipment owners can use grid connection to power on new equipment to test their equipment and systems, but for many large equipment, when it is necessary to start the test phase, it is not immediately connected to the grid. The grid power will also be affected by potential fluctuations during the test process, which may lead to inaccurate data collection and long time.
Through the customized engineering system of generator and dummy load bank, the equipment owner can realize complete system test even if the grid is unavailable. These devices provide sustainable and predictable power loads to enable fully accurate system testing in the short and long term.
The following is how the dummy load bank test process works:
1.Consulting service providers for better test solutions
The solar power plant needs to select a dummy load bank leasing supplier before carrying out the dummy load bank test. The following three selection criteria should be referred to:
Customized dummy load bank test solution: all devices are different. You should seek suppliers to develop customized test plans suitable for your devices. It is important to find a vendor with a broad inventory of dummy load bank solutions to meet your specific needs.
End to end service: find a load test service provider that can plan equipment placement, coordinate end-to-end logistics, provide roll out / roll up services, and create safe commissioning projects. The more end-to-end services, the more streamlined your debugging projects will be.
Flexibility: find mature suppliers who can and are willing to modify existing dummy load bank equipment or design new solutions to complete your project. Each solar power system is different, so you need a service provider that can meet your unique needs.
After selecting your solution provider, share all your project documents to help them better understand the strategy that is best suited to debugging your device according to your schedule. Factors such as equipment size, power demand, schedule and equipment specifications all play a role. Your service provider will use this information to develop an implementation plan before the foundation work begins.
2 Pre test preparation
After confirming the service provider, the provider will prepare all necessary equipment and deliver it directly to the equipment test site. There are several key components involved, which may vary depending on your specific equipment needs. The most basic equipment is:
Diesel generator
dummy load bank
Power quality monitor
inverter
3. Conduct dummy load bank test
To successfully test the solar power generation system, you must provide a stable power supply to the photovoltaic inverter. The dummy load bank and generator system can be connected to the main circuit breaker of the substation or multiple combiner boxes on site and activated to simulate the power load.
Once the common power supply is simulated in the solar power generation system, this will activate the internal circuit of the inverter. Solar panels that generate electricity continuously during the day will start generating electricity and synchronize with the power supply.
The power system is realized by providing a generator system rated at 120% of the inverter. For best results, two parallel generators are used to prevent frequency changes due to load reduction and application. The comprehensive dummy load bank test process will:
Energize the entire site so that available employees can work on different inverter pads at the same time.
Test the underground MV cables from the substation to the inverter.
Test the tracking system to ensure that the solar panels absorb the sun's energy correctly.
Verify the array sleep and wake-up modes to confirm the overall system functionality.
Test the efficiency of the inverter and its response to power fluctuations.
4. Dummy load bank test results
After the simulated commissioning process using the dummy load bank is completed, the solar power generation system owner will be able to:
Verify that all components work together, especially the inverter.
Ensure safe operation.
Demonstrate compliance with applicable standards and regulations.
Record system performance.
Establish performance benchmarks for future maintenance.
Reduce the possibility of future interruptions.
5. End the dummy load bank test
After the completion of the test project, the dummy load bank supplier will provide the dummy load bank test report and inform the customer whether it is necessary to modify or repair the solar power generation system.
