Microgrid Power Supply System Project

I. Project Overview

Project Name: Microgrid Power Supply System Project

Project Location: Nigeria

Construction Content: A microgrid power supply system consisting of ground-mounted photovoltaic, energy storage, and diesel generator sets.

II. Solar Energy Resources

Nigeria is located in the tropical region with abundant sunlight throughout the year, with annual sunshine duration exceeding 2600 hours (approximately 7 hours per day), making it rich in solar energy resources.

Nigeria is endowed with superior solar energy resources and long annual sunshine duration, providing favorable natural conditions for photovoltaic power generation. As the most populous country in Africa (with a population of over 220 million), its electricity demand continues to grow. However, insufficient grid coverage leads to frequent power outages, which further drives the market demand for photovoltaic energy storage systems.

III. Project Scheme

This project adopts a microgrid system composed of a photovoltaic system, an energy storage system, and a diesel power generation system.

3.1 Microgrid System

The microgrid system consists of photovoltaic modules, grid-connected inverters, PCS bidirectional converters, battery packs, diesel generators, loads, etc., and achieves stable power supply through multi-energy complementation.

(Image Description: Photovoltaic Power Generation System, Energy Storage System, Photovoltaics, Batteries, Diesel Power Generation System, Microgrid Energy Management Platform, Diesel Generators, Public Grid, AC, DC, Load, Communication)

The microgrid system composed of photovoltaics, energy storage, and diesel generator sets integrates multiple energy supply forms. This project mainly has two operating modes: grid-connected mode and off-grid mode;

 Grid-connected Mode

The system prioritizes the use of photovoltaic power generation to meet local load demands, and excess electricity is stored through energy storage devices or fed back to the grid. When photovoltaic output is insufficient, the diesel generator or energy storage system supplements the power supply. In this mode, the microgrid remains connected to the main grid and can realize energy management through two-way interaction.

 Off-grid Mode

Disconnect from the main grid and completely rely on photovoltaics, energy storage, and diesel power generation to achieve self-sufficiency. Photovoltaic power generation is used to meet local load demands, and excess electricity is stored through energy storage devices. When photovoltaic output is insufficient, the diesel generator or energy storage system supplements the power supply. At this time, the diesel generator serves as a backup power source and starts to supply power when the photovoltaic and energy storage systems are insufficient.

3.2 Photovoltaic Modules

This project recommends the use of monocrystalline silicon modules. Monocrystalline modules have high photoelectric conversion efficiency, and the quality of photovoltaic products meets relevant standards, with international certifications such as CE certification, TÜV certification, UL certification, etc. The main technical parameters are as follows:

Note: The above module power is nominal under Standard Test Conditions (STC): 1000W/m², solar irradiance, cell temperature 25°C, AM1.5.

3.3 Photovoltaic Inverters

This project recommends the use of string inverters, which have core advantages such as efficient power generation, flexible adaptation, and easy maintenance. 150kW/100kW inverters are recommended, and the inverter products meet relevant standards with international certifications such as CE certification, TÜV certification, UL certification, etc.

3.4 Energy Storage System

This project recommends the use of a 125kW/256kWh commercial and industrial energy storage system integrated cabinet.

IV. Investment Estimation

The main material list is as follows: