2010年-世界发展银行全球_Managing_an_Electricity_Shortfall___A_Guide_for_Policymakers_12页_944kb

Managing an Electricity Shortfall: A Guide for Policymakers

Core Content

This document provides a comprehensive guide for policymakers on how to manage electricity shortfalls through a combination of supply-side and demand-side measures. It outlines a framework for action and presents a variety of options that can be tailored to the specific nature, duration, and context of an electricity crisis.

Main Views and Key Information

1. Understanding Electricity Shortfalls

Electricity shortfalls can arise from either capacity constraints (insufficient generation or transmission capacity) or energy constraints (demand exceeds supply over time due to fuel shortages or increased consumption). These shortfalls can lead to blackouts, load shedding, and other disruptions, affecting both industrialized and developing countries.

2. Emergency Response Framework

An effective emergency response program should be tailored based on four factors:

• Origin of the supply-demand gap
• Expected duration of the shortfall
• Feasibility and cost of measures
• Institutional organization of the electricity sector

There is no one-size-fits-all solution, and the response must be flexible to the specific context.

3. Demand Side Measures

Demand side measures are crucial in the short to medium term and include:

• Increasing electricity prices:

  • Provides a signal to users to reduce consumption.
  • Effective for industrial users but may be delayed for residential consumers.
  • Requires smart meters and payment systems.

• Inducing changes in behavior:

  • Launching mass media campaigns to inform and encourage energy conservation.
  • Mandating energy conservation in the public sector to set an example.
  • Encouraging voluntary rationing through public awareness and incentives.
  • Compulsory rationing as a last resort, which requires data and social compensation.

• Introducing energy-efficient technologies:

  • CFL replacement programs are the most cost-effective.
  • Appliance replacement programs can also reduce demand, though at a higher cost.
  • Requires detailed information on current appliance stocks and usage patterns.

4. Supply Side Measures

Supply side responses focus on increasing generation capacity and improving efficiency. Key measures include:

• Improving generation and transmission outputs:

  • Enhancing the availability of existing assets.
  • Requires data on current limitations.

• Rehabilitating existing equipment:

  • Can increase capacity quickly and efficiently.
  • Needs data on equipment status and capacity.

• Expediting completion of plants under construction:

  • Helps prevent schedule delays.
  • Involves cost incentives and expediting efforts.

• Offering Power Purchase Agreements (PPAs):

  • Integrates backup generation into the dispatch pool.
  • Requires well-designed incentives and pricing structures.

• Using bagasse-fueled plants:

  • Utilizes sugar cane byproducts for energy.
  • Requires data on existing plants and tariffs.

• Adding capacitor banks:

  • Reduces transmission losses and increases MW capacity.
  • Costs $4.5 million for 90 MVAR at 230 kV.

• Installing advanced metering systems:

  • Reduces technical and non-technical losses.
  • Requires data on losses and public acceptance.

• Leasing high-speed reciprocating engines:

  • Provides temporary generation capacity.
  • Costs $0.151 per kWh.

• Leasing or purchasing used power plant equipment:

  • Cost-effective but risky due to limited warranties.
  • Requires a defined schedule for implementation.

5. Crafting an Emergency Response Program

To formulate an effective response:

• Identify the nature of the shortfall (peak capacity or energy).
• Determine the probable duration of the crisis.
• Analyze energy consumption by end-uses to understand potential impacts.
• Identify and measure impacts of proposed measures to ensure fiscal and social feasibility.
• Rank measures by cost and benefit to prioritize those with the highest impact-to-cost ratio.

6. Key Considerations

• Regulatory constraints can limit the use of certain instruments, such as tariff changes that require public hearings.
• Market-based pricing and rationing are more effective in reducing demand than direct subsidies, which can lead to affordability issues and fiscal strain.
• Demand-side measures generally have a smaller environmental impact than supply-side interventions.
• Preparation is key: Countries that anticipate crises and prepare detailed response plans are better equipped to handle them.

Conclusion

Managing electricity shortfalls requires a holistic and integrated approach that combines both demand and supply-side measures. Policymakers must consider the origin, duration, and context of the crisis, as well as the institutional and regulatory environment, to design a cost-effective and socially acceptable response. The document emphasizes that preparation and flexibility are essential for successful crisis management.