Microgrid Solutions and Case Studies

Concept and Significance of Microgrids

Microgrids refer to small-scale power generation and distribution systems composed of distributed power sources, energy storage devices, energy conversion devices, loads, monitoring, and protection devices arranged in a specific topology.

• Microgrid Features:
  • Flexibly interact with the main grid, providing bidirectional services such as backup, peak shaving, and demand response.
  • Improve energy utilization efficiency and reduce energy costs.
  • Enable the friendly integration of renewable energy, promoting local development and consumption of renewable energy.
  • Enhance power supply reliability and reduce outage losses.
  • Support the development of energy internet, new energy, energy storage, and related industries.

Market Analysis

Domestic Microgrid Market:

International Microgrid Market:

Key Customers and Business Status:

Power Consumers:

• High-energy-consuming industrial parks; sensitive loads such as data centers.
• Key Needs: Delay system capacity expansion, reduce energy costs, optimize economic operations, and improve power reliability and quality.

Power Suppliers:

• Distributed energy investors, power sales companies, electric vehicle charging stations, etc.
• Key Needs: Economic operation, high reliability, good power quality, strong data analysis capabilities, market response functions, and cloud platform monitoring.

Independent Microgrids:

• Regions with high-altitude, remote, or no access to public grids.
• Key Needs: Utilize local renewable energy, strong environmental adaptability, high economic efficiency, independent off-grid operation, and automatic voltage and reactive power control.

Application Areas and Characteristics:

Advantages:

• Improve energy utilization efficiency: Optimize distributed energy use and reduce energy waste.
• Enhance power supply reliability: Continue to supply power to users, improving system stability and reliability.
• Environmentally friendly: Reduce greenhouse gas emissions through renewable energy integration, promoting sustainable development.
• Reduce operating costs: Optimize energy dispatch in regions with volatile energy prices, lowering energy costs.
• Flexibility: Expand or shrink the system according to demand, providing high flexibility for different usage scenarios.

Case Studies:

Case 1: Township-Level Intelligent Microgrid Project

• Composed of wind turbines, photovoltaics, lithium iron phosphate batteries, and diesel generators.
• Recommended Products: Junction boxes, photovoltaic controllers, off-grid inverters, and monitoring systems.
• System Characteristics: DC bus + voltage source inverter + diesel generator + switch; simple and reliable, no need for EMS system.

Case 2: Island Microgrid

• Demonstration project of an independent distributed energy microgrid system.
• Utilizes wind, solar, diesel, and energy storage to power a desalination system, addressing power and water needs on the island.
• Recommended Products: Energy storage systems, energy management systems.

Case 3: Nanjing Building Microgrid

• Research on coordination and optimization control technology for multiple distributed power sources connected to the grid.
• Effectively suppresses power fluctuations from renewable energy sources due to natural factors through battery storage system control.
• Promotes the development of renewable energy technology.

Case 4: Inner Mongolia Mining Microgrid

• Previously relied on diesel generators. The project reduces annual diesel usage significantly.
• Provides 100% renewable energy for mining operations during the day and balances power supply with storage systems and photovoltaics at other times.

Case 5: Farm Microgrid

• Installs a 50kW solar power system, including 420 photovoltaic panels and a diesel backup generator.
• Ensures efficient farm operations, providing power for pig farms and new barns.
• Provides stable power during extreme weather, reducing risks and ensuring normal farm operations, saving