A methodology for understanding the impacts of large-scale penetration of micro-combined heat and power

• Published in: Energy policy 2013-10, Vol.61 (1), p.496-512
• Main Authors: Tapia-Ahumada, K., Pérez-Arriaga, I.J., Moniz, E.J.
• Format: Article
• Language: English
• Subjects: AIR POLLUTION ABATEMENT; Applied sciences; CAPACITY; CARBON DIOXIDE; Carbon emissions; COMBINED-CYCLE POWER PLANTS; CONTROL; Economic data; Economic efficiency; economic impact; Electric energy; Electric power; Electric power systems; Electricity distribution; Energy; Energy economics; ENERGY EFFICIENCY; ENERGY PLANNING, POLICY AND ECONOMY; ENERGY POLICY; Energy. Thermal use of fuels; Engines and turbines; ENVIRONMENTAL POLICY; Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc; Exact sciences and technology; FUEL CELLS; Fuels; GAS TURBINE POWER PLANTS; General, economic and professional studies; greenhouse gas emissions; heat; Heat engines; issues and policy; Large-scale penetration; Market penetration; Marketing; NATURAL GAS; PEAK LOAD; PLANNING; Power demand; POWER SYSTEMS; PRICES; Production; Residential co-generation; Studies; summer; Tariff; TARIFFS; Technology
• ISSN: 0301-4215; 1873-6777
• DOI: 10.1016/j.enpol.2013.06.010

Co-generation at small kW-e scale has been stimulated in recent years by governments and energy regulators as one way to increasing energy efficiency and reducing CO2 emissions. If a widespread adoption should be realized, their effects from a system's point of view are crucial to understand the contributions of this technology. Based on a methodology that uses long-term capacity planning expansion, this paper explores some of the implications for an electric power system of having a large number of micro-CHPs. Results show that fuel cells-based micro-CHPs have the best and most consistent performance for different residential demands from the customer and system's perspectives. As the penetration increases at important levels, gas-based technologies—particularly combined cycle units—are displaced in capacity and production, which impacts the operation of the electric system during summer peak hours. Other results suggest that the tariff design impacts the economic efficiency of the system and the operation of micro-CHPs under a price-based strategy. Finally, policies aimed at micro-CHPs should consider the suitability of the technology (in size and heat-to-power ratio) to meet individual demands, the operational complexities of a large penetration, and the adequacy of the economic signals to incentivize an efficient and sustainable operation. •Capacity displacements and daily operation of an electric power system are explored.•Benefits depend on energy mix, prices, and micro-CHP technology and control scheme.•Benefits are observed mostly in winter when micro-CHP heat and power are fully used.•Micro-CHPs mostly displace installed capacity from natural gas combined cycle units.•Tariff design impacts economic efficiency of the system and operation of micro-CHPs.