Aggregated power system load area models with three different approaches
by Jianlin Wei, Jihong Wang, Q.H. Wu
International Journal of Modelling, Identification and Control (IJMIC), Vol. 12, No. 4, 2011

Abstract: Aggregated load area model (ALAM) is a method of modelling the power system load by aggregating loads within a load area to derive a simplified load model. The aggregated model will generalise a set of equivalent system parameters which are unknown and immeasurable. The paper presents three different ALAM approaches, in which different parameter identification methods are adopted, which are voltage-two-step (VTS), current-two-step (CTS) and direct-one-step (DOS) approaches. The VTS approach identifies the parameters of by adopting a voltage-matching scheme but the CTS approach using a current-matching scheme. The DOS approach identifies the parameters based on a bus-matching scheme. Theoretical explanation and analysis to the three approaches are given in the paper and simulation studies were carried out for IEEE-14, IEEE-57 and IEEE-118 power systems. The three approaches are compared and an initial test on topological organisation of load areas is carried out. All the test results indicate that ALAM has a great potential for practical applications in load analysis and prediction.

Online publication date: Sat, 21-Mar-2015

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