A full range of electrical supporting projects for photovoltaic power stations
Project overview
Provide the power station with a full chain of electrical supporting equipment from the DC side to the AC grid-connected side, covering combiner boxes, inverters, step-up transformers, grid-connected cabinets and intelligent monitoring systems, adapting to the local 1500V DC system voltage and 10kV grid-connected standards.
Indonesia fit
Unify the DC side, inverter, boost, grid-connected cabinet and PLN grid-connected data for investors to avoid power generation losses caused by mismatching parameters of the combiner box, inverter, and boost transformer. The plan targets high temperature, high humidity, strong UV and island logistics in Indonesia, and locks in protection levels, delivery dates, spare parts and grid-connected test plans in advance.
Professional configuration and standards
The DC side is adapted to the 1500V DC system. The equipment is configured according to IEC 62548, IEC 62109, IEC 61439, IEC 60529 and IEC 61643. The inverter meets the requirements for grid-connected protection, low/high voltage ride-through and power factor adjustment; outdoor equipment uses IP65, C4/C5 anti-corrosion and anti-UV materials to complete insulation, voltage resistance, grounding, IV Curves, inverter efficiency, grid protection and SPD testing.
Key specification comparison table
| Configuration items | common practice | Optimized delivery specifications and value |
|---|---|---|
| DC voltage | 1000V DC conventional configuration | 1500V DC reduces line losses and bus levels, suitable for 10MW ground power stations |
| outdoor protection | IP54 ordinary box | IP65, anti-UV coating, C4/C5 anti-corrosion, suitable for tropical outdoor use |
| Grid connection information | Equipment data is scattered | Submit a complete set of inverter parameters, protection settings, and PLN grid-connected documents |
Delivery challenges and solutions
a.Challenge: Due to the local high temperature, high humidity and strong ultraviolet rays, the risks of DC side arcing and equipment aging are significantly increased.
Solution: The DC side is equipped with an intelligent arc detection device as standard, and the equipment has been upgraded with IP65 protection and anti-UV coating, reducing fire risks by 95%.
b.Challenge: Island logistics transportation cycle is long, and delays in equipment arrival can easily affect grid-connected nodes.
Solution: The core equipment is stocked in advance to the Jakarta transfer warehouse, and the sea and land segmented transportation mode is adopted to ensure that the equipment arrives at the site according to the node.
c.Challenge: The PLN grid connection acceptance standards are very different from those in China, and are prone to repeated rectifications.
Solution: Senior grid-connection technical experts were dispatched to connect with PLN throughout the entire process, and the grid-connection parameters were adjusted in advance according to Indonesian power grid standards, and the project acceptance was passed in one go.
Project results
The power generation efficiency of the power station has increased by 10% compared with the local average. The 10MW power station generates an average of more than 1 million kilowatt-hours of electricity per year. Cloud monitoring is unattended, and operation and maintenance costs are reduced by 40%.