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A study on power flow congestion relief in cooperation with customer‐side cogeneration systems
Author(s) -
Furusawa Ken,
Yanase Kazunori,
Sugihara Hideharu,
Tsuji Kiichiro
Publication year - 2008
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.20674
Subject(s) - cogeneration , electric utility , electric power , transmission (telecommunications) , computer science , electricity generation , power (physics) , automotive engineering , engineering , telecommunications , electrical engineering , physics , quantum mechanics
Dispersed generation technologies (e.g., gas engines) have greatly advanced in recent years. Gas engines are often operated as the main component of a cogeneration system (CGS). By using exhaust heat, the total efficiency of CGSs can reach from 70% to 80%, and as a result, it is also useful for reductions of CO 2 emission. Therefore, CGSs have been given preferential treatment by the Japanese government and their installation and use is expected to become widespread in the future. When customers introduce CGSs, these systems have an influence on the demand profile for electric utilities. On the other hand, CGS operational patterns depend on customers' economic requirements; thus, it is difficult to flexibly change those patterns so that they meaningfully contribute to the electric utility. As a demand response program, the authors proposed a method whereby CGSs at the customer side are used for congestion relief in transmission networks. In the proposed method, the optimal configuration of energy systems including CGSs at the customer side is determined. As well, the optimal operation of the electric utility's generators is also determined taking into account the CGS operation patterns. This paper evaluates both costs to the electric utility and the customers' cost for congestion relief in transmission networks. Further, we evaluate the influence on CO 2 emission and primary energy consumption from the viewpoint of a unified energy system with CGSs providing input on a flexible operation pattern. © 2008 Wiley Periodicals, Inc. Electr Eng Jpn, 165(4): 30– 40, 2008; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.20674