Case Study

Microgrid Solutions and Case Studies

Post time: 2024-06-12

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:

Year

Market Size (Billion CNY)

2020 4.0
2021 4.33
2022 4.68

International Microgrid Market:

Year

Market Size (Billion USD)

2020 1.43
2021 1.57
2022 1.81

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:

Type

Owner

Application Characteristics

Off-grid/On-grid Industrial Parks New energy generation, multi-energy complementarity, load balancing, and improved energy efficiency.
Government, Hospitals, Airports High power quality requirements and reliable power supply.
Tourism Areas Environmentally friendly and reliable power supply.
Power Sales Companies New energy generation and new trading platforms.
Villas, Farmers Save electricity costs, power generation, and improved power quality.
Remote Areas Solve electricity problems with government subsidies.
Islands, Military Reliable power supply.
DC/AC Hybrid IDC, Industrial Parks Mixed DC/AC power supply requirements.

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.

3Building Microgrid

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