Geetha Natarajan and Perumal Renuga
Bilateral transactions, secure transaction matrix, pool and bilateral coordinated model, linear programming, DC load flow, DC optimal power flow
As restructuring and deregulation intensify in electric power industry, electricity sellers and buyers are permitted to establish various bilateral service transactions. The key information of how much power can be transferred through network in an interconnected power system safe and secure is major criteria for companies par- ticipating in competitive environment. Hence the transactions must be assessed ahead of their scheduling in a day ahead market and hour ahead market and these must be within Available Transfer Capability (ATC) limits to avoid congestion. This paper describes the methodology of modelling the bilateral transactions using a Transaction matrix T and proposes generalized linear programming formulation to solve various system operation and planning problems for bilateral demand and DC optimal power flow (DCOPF) formulation for pool demand in pool and bilateral coordinated market model subject to steady state security constraints. Monte Carlo methods are applied for generation of random bilateral transaction matrices and assessment of relation between bilateral transactions and system security is carried out. The impact of unified power flow controller (UPFC) placed in a transmission line of the network is studied. The reduction of cost of generation and scope for additional transfer capability are achieved due to optimal UPFC placement.
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