Abstract
This paper presents a new approach for considering all possible contingencies in short-term power system operation. Based on this new approach, both generator and transmission line outages would be modelled in network-based power system analysis. Multi generator and also parallel transmission lines is modelled in this methodology. We also investigate this claim that feasibility and applicability of this approach is much more than the previous analytical methodologies. Security Constrained Unit commitment (SCUC) program which is carried out by Independent System Operator (ISO), is one of the complex problems which would be handled by this approach. In this paper, a DC-Optimal Power Flow (DCOPF) methodology has been considered for hourly Locational Marginal Price (LMP) calculations. This approach can be applied in market simulation and planning owing to its robustness and speed. Unlike, previous admittance based matrix methodologies, which solidly depended on the network topology, independency of network in the presented approach; it would be an effective tool for considering possible contingencies in the grid. The simulation results show that the presented method is both satisfactory and consistent with expectation. Keywords: Incidence Matrix, Security Constrained Unit Commitment, Contingency Analysis, Independent System Operator.
Highlights
This paper presents a new approach for considering all possible contingencies in short-term power system operation
Power Flow (DCOPF) methodology has been considered for hourly Locational Marginal Price (LMP) calculations
For multiple generation units which installed in each bus, contingency analysis would be carried out, but for transmission line contingencies because of changing the admittance elements but in the incidence matrix formulation this objection has been removed
Summary
Security analysis, the ISO implemented SCUC software to ensure that the final generation scheduling has the ability to withstand sudden and potentially extreme disturbances such as short circuits or the loss of a major system component. Contingency Analysis (CA) is one of the main tasks which are incorporated by ISO to do this target. In CA, ISO performs the Security Constraint Optimal Power Flow (SCOPF) and considers both generator and transmission line outages. In network-oriented optimal power flow analysis the outages of transmission lines changes the structure of admittance matrix, which makes it considerably complex. In this paper we propose the Incidence Matrix methodology to overcome the traditional challenges which are incorporated with admittance matrix based methodologies. The remainder of this paper is organized as follows
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