A full range of electrical supporting solutions for photovoltaic power stations

Detailed plan description

For distributed photovoltaic, ground centralized photovoltaic, and industrial and commercial photovoltaic power stations, we provide full-chain electrical equipment supporting and technical services from the DC side to the AC grid-connected side. Covering photovoltaic module matching, combiner box selection, inverter configuration, step-up transformer and grid-connected cabinet supply, and supporting intelligent monitoring systems to achieve real-time collection of power station power generation data and remote fault diagnosis, maximizing power station power generation income and operational stability.

Adapted to Indonesia

Solve the procurement problems of "component/inverter mismatch, incomplete grid connection data, DC safety risks, and slow remote operation and maintenance" for industrial and commercial rooftops, hotels, parks, and ground power stations. The solution covers combiner boxes, inverters, step-up transformers, grid-connected cabinets, monitoring and lightning protection and fire protection data, and is adapted to Indonesia's high temperature, high humidity, high UV, roof bearing and PLN grid-connected audits.

Professional specifications and standards based

The DC side is selected according to the 1000V/1500V system, the combiner box is IP65, SPD Type I/II, the inverter efficiency is recommended to be no less than 98.5%, the AC side is 400V or boosted to 20kV/35kV. Refer to IEC 62548, IEC 62109, IEC 61727, IEC 62116, IEC 61439, IEC 60076, and prepare the required materials for SNI/PLN grid connection.

Product specification comparison table

Original experience and test data

Scarce experience: Rooftop projects in Indonesia often lose power generation due to cable voltage drops, DC arcing and improper inverter MPPT configuration.

Pitfalls and pain points that I have stepped on

• Improper matching of components and inverter parameters leads to MPPT tracking failure and overall power generation efficiency loss of more than 10%;
• The risk of arcing on the DC side is high, and without protective devices it can easily cause fires, which is the number one safety hazard in photovoltaic power plants;
• The operation and maintenance radius of remote ground power stations is large, fault location relies on manual troubleshooting, and a single fault can cause downtime for several days;
• The grid-connected equipment does not meet the grid standards, and repeated rectification after acceptance will delay the grid connection time and power generation revenue.

Core parameters

It is suitable for power station capacity of 100kW~100MW, DC system voltage of 1000V/1500V, grid-connected voltage level of 10kV/35kV, inverter conversion efficiency ≥98.5%, annual power generation utilization hours ≥1100h, and fault location response time ≤5 minutes.

Our special contribution

• Customized parameter matching design, accurate selection of inverters and combiner boxes based on component specifications, increasing power generation efficiency by 8%~12%;
• The DC side is equipped as standard with an intelligent arc detection device and millisecond-level power-off protection, reducing fire risks by 95%;
• Cloud photovoltaic monitoring platform supports remote fault diagnosis and predictive maintenance, reducing operation and maintenance costs by 40%;
• Full-process grid connection technical guidance, all equipment meets the grid connection standards, and the project acceptance pass rate is 100%.

Project income

• Economic benefits: The power generation efficiency is increased by 8% to 12%, and the 10MW power station generates more than 1 million kilowatt-hours of electricity annually, increasing revenue by about 400,000 to 600,000 yuan; the operation and maintenance cost is reduced by 40%, and the average annual manual inspection cost of remote power stations is more than 300,000 yuan; the grid connection acceptance is passed once, and the power generation is connected to the grid 15 to 30 days in advance, realizing benefits early.
• Safety benefits: DC arc protection coverage is 100%, fire risk is reduced by 95%, and major property losses and safety accidents are avoided.
• Management benefits: The cloud monitoring platform is unattended, and the number of power stations managed by operation and maintenance personnel has been increased by three times.