2017年-世界发展银行全球_Mini-Grids_and_Arrival_of_the_Main_Grid___Lessons_from_Cambodia_Sri_Lanka_and_Indonesia_84页_1016kb

Summary of Lessons from Cambodia, Sri Lanka, and Indonesia on Mini Grids and Main Grid Interconnection

Core Content

This report examines the experiences of three countries—Cambodia, Sri Lanka, and Indonesia—in managing the transition of previously isolated mini grids to the main grid. It highlights the regulatory, financial, and technical challenges and opportunities faced by community and private mini grid operators during this transition.

Main Points

1. Mini Grids in Developing Countries

• Most mini grids in developing countries initially operate as isolated systems due to the slow or unreliable expansion of the national grid.
• These systems are often built by local entrepreneurs or community organizations to meet local energy needs.
• As the main grid expands, these mini grids face a critical decision: whether to continue operating, convert to a small power producer (SPP), or become a small power distributor (SPD).

2. Regulatory Frameworks and Business Models

• Regulators in several countries, including Cambodia, India, Indonesia, Nepal, Nigeria, Rwanda, and Sri Lanka, have introduced or proposed rules that allow for multiple post-interconnection business models.
• These include:
  • Compensation and exit: Mini grids shut down and receive compensation for their assets.
  • Small power purchaser (SPP): Mini grids sell electricity exclusively to the main grid.
  • Retail + SPP: Mini grids continue to serve retail customers and also sell to the main grid.
  • Small power distributor (SPD): Mini grids buy electricity from the main grid and sell it to local customers.
  • Side-by-side but not interconnected: Mini grids continue to serve customers without being physically connected to the main grid.
  • Abandonment: Mini grids are forced to stop operations due to lack of support or viability.

3. Country-Specific Outcomes

Cambodia

• What Happened: Over 250 diesel-fueled mini grids were converted to SPDs after the national grid (EdC) expanded into rural areas.
• Why:
  • The national regulator (EAC) used licensing to incentivize mini grid operators to improve their systems to meet national standards.
  • The government provided operational subsidies to ensure affordability and commercial viability for SPDs.
  • The distribution margin allowed for cost recovery and expansion.
  • Mini grid operators were motivated to scale operations and achieve economies of scale.

Sri Lanka

• What Happened: Most community-owned micro-hydropower projects (VECS) were abandoned when the main grid (CEB) arrived, with only three converting to SPPs.
• Why:
  • CEB offered lower, subsidized tariffs and better service quality.
  • VECS were too small to be viable as SPDs.
  • Distribution facilities did not meet CEB standards.
  • Lack of financing and regulatory support contributed to their abandonment.

Indonesia

• What Happened: Many community-owned micro-hydropower projects were abandoned when the main grid arrived.
• Why:
  • Similar to Sri Lanka, the main grid offered more reliable and cheaper electricity.
  • Micro-hydro projects lacked the infrastructure or financial support to transition into SPPs or SPDs.
  • Regulatory and anti-corruption policies created barriers to interconnection.

Key Information

• Regulatory and Policy Influence: Clear and supportive regulatory frameworks are essential for enabling mini grids to transition smoothly to the main grid. Countries that have implemented such frameworks, like Cambodia, have seen more successful conversions.
• Cost and Revenue Models: The cost of interconnection depends heavily on the post-connection business model. Subsidies are often needed to bridge revenue shortfalls.
• Technology and Scale: Mini grid technology, scale, and history significantly affect interconnection outcomes. Second-generation mini grids are typically community or locally owned, while third-generation mini grids involve private companies and advanced technologies.
• Consumer Behavior: In some cases, consumers opt for the main grid despite higher prices due to better reliability and service quality.
• Future Recommendations: The report suggests that further research and pilot projects are needed to explore different business models and technical requirements for mini grids. It also emphasizes the importance of proactive regulatory development to invigorate investment.

Concluding Observations

• Transition Outcomes: Community-owned mini grids generally stop selling directly to retail customers when the main grid arrives.
• Limited Conversion: Few isolated community-owned mini grids have successfully transitioned to SPPs or SPDs.
• Cambodia Exception: Cambodia is an exception, having successfully transformed many diesel mini grids into SPDs through supportive policies and subsidies.
• Regulatory Challenges: Anti-corruption and investment policies can hinder the interconnection process.
• Technology and Scale: Mini grid technology, scale, and historical context influence the success of interconnection.
• Subsidies Needed: Revenue shortfalls often require subsidies to ensure continued operation.
• Mini Grids vs. Main Grids: The report challenges the notion that mini grids and the main grid are mutually exclusive, suggesting that they can coexist in certain models.
• Investment and Policy: Proactive development of regulatory frameworks is crucial to attracting investment and enabling successful mini grid transitions.

Recommendations

• Develop clear and flexible regulatory frameworks that support multiple post-interconnection business models.
• Provide subsidies and financial support to ensure affordability and viability for mini grid operators.
• Encourage public-private partnerships to leverage government support for mini grid projects.
• Promote the use of advanced technologies and modular systems to enhance efficiency and scalability.
• Conduct further research and pilot projects to explore the potential of different mini grid models and their integration with the main grid.