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Kstar provides inverter for solar plant in China

Published by
Energy Global,

Shenzhen Kstar Science & Technology Co.Ltd. has announced that the company’s central inverter (GSL2500C-MV and GSL1250) solutions, are connected into the 120 MW solar power plant on the Zhouxiang reservoirs as part of the second phase of a 320 MW project in Cixi city, Zhejiang province, China. The power plant started to generate electricity on 30 December 2019. The subsidy is 0.095 RMB kwh and the total investment of the second Phase is US$100 million.

Phase I of the project (FIT is 0.85 RMB) is a 200 MW installation with a total investment US$250 million at Zhouxiang reservoirs in Cixi. The plant has been operational for more than three years at a solar-water Power Park.

The challenges at Zhouxiang reservoirs in Cixi are:

  1. The climate is frequently foggy (salt fog) and humid, so the equipment needs to have strong anti-corrosion ability.
  2. The construction cost of the power station is large, so the cost of inverters and system should be reasonable and cost-effective.
  3. Operation and maintenance are difficult and the cost is high.

To overcome those challenges and boost the local economy as well as saving land resources, the 320 MW (120 MW+200 MW) solar-water power plant at the reservoirs was installed. The PV central inverters are all provided by KSTAR. All of the KSTAR inverters GSL2500C-MV and GSL1250 are equipped against humidity and have protection against dirt and moisture. IP54 guarantees the protection against corrosion in high humidity and in the salt fog environment. Therefore, The PV power plant on a body of water has a high-power generation efficiency and brings low operations and maintenance costs as well as a minimal maritime impact.

The solar-water power plant has been completely grid-connected with an expected annual generation of 352 million kWh. All electricity generated is connected into the State Grid Corporation of China, greatly reducing the pressure of local power grid operation, and also making environment much greener by utilising renewable energy.

The power plant replaces 100 000 tpy of coal and reduces 189 200 t of CO2 and 14.32 million t of sulfur dioxide. The annual electricity revenue of the owner is approximately US$45 million.

KSTAR’s central inverter greatly shortens construction period and saves operation cost, but also has great advantages in post-operation and maintenance, anti-corrosion capacity, smart anti-PID solutions. There are four big advantages for KSTAR PV solution for central inverters:

  1. Low cost in investment and system maintenance:
    The solutions integrate high-efficiency booster transformer, medium-voltage distribution and monitoring system. Integral hoisting reduces the construction difficulty and shortens the construction period. The transformer can be customised to cope with a variety of application scenarios.
  2. Natural cooling design:
    The method for heat-dissipation is forced air cooling, with a vertically designed duct. Air extraction is handled by the power module. Heat dissipation from the air duct of the inverter is designed to be isolated from that of the magnetic unit (reactor). The fan is controlled intelligently and only starts when a maximum temperature has been reached.
  3. Strong corrosion resistance:
    IP54 meets the application conditions of the power station and guarantees the protection against corrosion in a high humidity and salt fog.
  4. Strong protection and maintenance capability:
    KSTAR’s inverters are featuring PID protection, which can effectively prevent PID attenuation of components and ensure the performance of components and power generation of the station. KSTAR’s turnkey solutions with central inverters installed is flexible and has strong adaptability. Moreover, the solar-water power plant helps to reduce the investment cost, speed up the project’s completion, and ultimately achieve the maximum revenue for the owners.

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