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This paper reports on a case study for Ghana's thermal/hydroelectric generation system that evaluates the incremental cost of returning dam outflows to pre-dam or near pre-dam conditions. This mode of operation is termed Run of River (ROR) operation. It appears that two key factors - the availability of alternatives for economically expanding hydro generation and the existence of well developed markets...
This paper presents the strategy for development of a stochastic programming model of the operation and capacity additions to a large hydro/thermal electricity generation complex. The proposed model minimizes the incremental costs of operating the complex so as to return river flows to pre-dam patterns. The paper focuses on a representative year made up of wet and dry seasons far enough into the future...
A unit commitment problem has long been known in the class of short-term functions and decisions, inherited from vertically integrated utility. In the competitive environment, the problem has become more complicated due to the fact that any action taken will now influence profitability of decision maker such as generation companies, load serving entities, and so forth. Thus, not only do economic agents...
Electricity suppliers are always confronted with demand uncertainty even though the state-of-the-art forecast and sophisticated control systems are employed to ensure both security and reliability. With the emergence of power market, the market participants such as generation companies, load serving entities, etc., even face higher degree of uncertainty in its operation planning. This is due to the...
This work discusses the Purdue long-term expansion model (LTEM), which is used in both the SAPP and WAPP policy planning. This policy is a 20-year planning system for energy and reserve trade between countries, which minimizes the present value of electricity generation costs, and generation/transmission capacity expansion costs. Modeling demonstrations consistently indicate the importance of several...
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