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Transmission elements are traditionally treated as non-dispatchable asset in the network. Co-optimizing transmission topology and generation dispatch could be a viable way to further maximize the market surplus and improve economic efficiency. This paper will discuss the mathematical formulation of optimal transmission switching. The benefit gain by deploying the transmission switching model will...
Infeasible, sub-optimal and/or degenerate solutions of the economic dispatch problem cause undesirable effects on the ex-ante and ex-post market price calculations. To determine market prices, this paper explores a scheme that relies on a dual formulation of the economic dispatch problem, stated in terms of prices, i.e. prices become variables. With such a dual perspective, direct control of the prices...
The uncertainty of generation required to maintain system balancing has been growing significantly due to the penetration of renewable energy resources such as wind power and the impact of demand response. To deal with such uncertainty, RTO's require more look-ahead and forecasting capabilities beyond real-time. In this paper a new dispatch system called Generation Control Application (GCA) is proposed...
This paper proposes a simple, yet rigorous, model for MW dependent ramp rates. The model is formulated as mixed linear integer constraints, and is appropriate for Unit Commitment and multi-interval dispatch formulations used by Independent System Operators (ISO) and self-scheduled generators in electricity markets. 5-bus examples are used to demonstrate the value of the proposed model, as it guarantees...
To deal with the pricing aspects of transmission constraint management, Independent System Operators (ISOs) use heuristic tuning of parameters in the “primal” space of the economic dispatch problem, in order to get indirectly “good” “dual” variables, i.e. prices. A method that works directly in the dual space of the economic dispatch to get prices ($/MWh), guided by the primal solution (MW) obtained...
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