Successful Practice of Solar Inverters in Island Power Supply

Successful Practice of Solar Inverters in Island Power Supply

Introduction
In the vast ocean, islands are like shining pearls. However, these islands far away from the mainland face many challenges in power supply. The traditional diesel generator power supply method is not only costly and polluting, but also subject to the stability of fuel supply. As a clean and renewable energy source, Solar Energy has shown great potential in island power supply. As one of the core equipment of the solar power supply system, the performance and reliability of the solar inverter are directly related to the stable operation of the entire power supply system. This article will introduce several successful cases of solar inverters in island power supply to demonstrate its outstanding performance in solving island power supply problems.

Zhejiang Beiji Island 1.274MW off-grid photovoltaic energy storage power station project
Project background: Zhejiang Beiji Island is an island far away from the mainland. In the past, power supply mainly relied on diesel generators, which had problems such as unstable power supply, high cost, and environmental pollution.
System composition: This off-grid photovoltaic energy storage power station project is based on the mature microgrid solution of Inovance Technology. It consists of a light, diesel and storage off-grid power transmission and utilization system consisting of a diesel generator set, a backbone network support system, an energy storage system, a photovoltaic power generation system and a user power system. The diesel generator set consists of 2 250kW and 1 500kW diesel generators, and 4 250kVA bidirectional converters constitute the microgrid backbone network. Two of the bidirectional converters are equipped with 400kWh lithium iron phosphate batteries, and the other two are equipped with 900kWh lead-acid batteries. In order to ensure the energy storage capacity of the system, 2 250kW energy storage converters are configured, and each energy storage converter is equipped with a 2MWh lead-acid battery. The photovoltaic power generation system consists of 1.274MW solar panels and 5 250kW Inovance photovoltaic inverters.
Operation: The entire microgrid system is allocated energy, and equipment operation and shutdown are controlled through the EMS, or energy management system. Through the analysis of the island's electricity consumption data and the reasonable estimation of user load changes, the self-power supply of more than 300 days a year can be guaranteed by using photovoltaics and energy storage batteries without diesel generators. Diesel generators are used for power supply only when the weather does not allow photovoltaic power generation.
Project results: The project effectively solved the problems of power supply shortage, poor power quality, and unstable power supply on the island, protected the island's ecological environment, provided clean energy to promote the island's economic development, reduced residents' electricity costs, and also improved the island's energy self-sufficiency rate and power supply reliability.

Zhuhai Dong'ao Island 1MW Microgrid Project
Project background: Dong'ao Island is a scenic tourist island, but few tourists set foot on it due to lack of electricity. In order to solve the electricity problems of residents and tourists on the island, a wind-solar-diesel-storage microgrid was built.
System composition: The voltage level is 10kV, including 1.04MWp photovoltaic, 50kW wind power generation, 1220kW diesel engine, 2000kWh lead-acid battery and intelligent control, safe and fast cut-in or cut-out of multi-level power grid, realizing the integration of micro energy and load, access and operation of clean energy, and also has local and remote energy control systems.
Equipment advantages: The IBT-G series off-grid inverter used in this project is a high-performance product developed by Huichuan for off-grid scenarios such as islands and remote areas. It has a friendly human-computer interaction interface and powerful parallel function, can flexibly configure the installed capacity of the system, can automatically identify and adapt to different load types, ensure that the power supply quality is not affected, and also supports remote monitoring and fault warning functions, which greatly improves the reliability of the system.
Implementation effect: The microgrid solves the electricity problem of Dong'ao Island, attracts more tourists to travel, and promotes the development of local tourism. At the same time, it reduces the use of diesel generators, reduces carbon emissions, and protects the ecological environment of the island.

Sansha Yongxing Island Microgrid Project
Project Background: As the administrative center of Sansha City, the power supply of Yongxing Island is crucial to ensuring the life and administrative office of the military and civilians on the island. However, due to the special geographical location of the island, power supply faces many difficulties.
Solution: The project makes full use of renewable energy such as solar energy, wind energy, and ocean energy, actively utilizes clean energy such as natural gas and biomass energy (biogas), and combines new environmentally friendly energy storage technology to form a micro-intelligent energy management and dispatching network. Photovoltaic modules are installed on the roofs on both sides of Beijing Road along Yongxing Island as distributed energy, equipped with 1000kWh lithium iron phosphate batteries as energy storage and buffering, and combined with intelligent microgrid management and control technology.
Project Impact: After the 500kw Sansha microgrid system project was successfully put into operation, it has well solved the problem of electricity difficulties in production and life of the military and civilians on the island, laid a good foundation for the development of electricity and efficient comprehensive utilization of energy on the island, achieved the synchronous development of ecological protection and economic construction, and accumulated valuable experience for the energy development and construction of the South China Sea islands in my country.

Photovoltaic power station project on an island in Sudan
Project background: The average annual sunshine duration of Sudan's coastal islands exceeds 2,800 hours, and the solar energy resources are rich, but the harsh environment puts special requirements on the equipment.
Product advantages: The project uses Homai's micro inverter, which has the characteristics of small size, easy installation, safety and reliability, and can realize flexible configuration and optimization of power quality, perfectly adapting to the efficient power generation needs of Sudan's islands. It has a unique heat dissipation design, which maximizes the heat dissipation effect by separating the heat conduction between power semiconductors, reduces the operating temperature of power semiconductors, and improves the service life and power generation efficiency. In addition, Homai's micro inverter also has intelligent arc monitoring and circuit breaking technology. When an arc is detected, it can quickly cut off the circuit to protect the system safety.
Project results: The use of Homai micro inverters has improved the electricity quality of residents on Sudan's coastal islands, reduced dependence on diesel generators, created a healthy and harmonious living environment for local residents, and also provided support for the sustainable development of the islands.

Greece Santo Winery Photovoltaic System Project
Project Background: The Santo Winery Photovoltaic System Project, located in Santorini, Greece, is a 10kW small photovoltaic system mainly used for wine production, agriculture and tourism.
Equipment Features: The project uses Sungrow inverters, which can not only seamlessly integrate with the photovoltaic system to achieve efficient energy conversion, but also provide reliable power supply to ensure the smooth progress of the entire production process. At the same time, the inverter also has a user-friendly interface for easy monitoring and setting.
Economic Benefits: The project enables Santo Winery to reduce the consumption of traditional energy, reduce production costs and improve economic benefits. In addition, Santorini is one of the most watched islands in the world, and the implementation of this project will also help to enhance the island's image of sustainable development.

Summary
The successful application of solar inverters in island power supply provides a practical solution to the problem of island power consumption. These cases fully demonstrate the advantages of solar inverters in improving the reliability of island power supply, reducing electricity costs, and protecting the ecological environment. With the continuous advancement of technology and the reduction of costs, solar inverters will play a role in more island power supply projects, providing cleaner, more stable and sustainable power guarantees for island residents and economic development. For international wholesale buyers, these successful cases also prove the demand and development potential of the solar inverter market. Choosing high-quality solar inverter products and solutions will help occupy a place in the global island power supply field and promote the development of the new energy industry.