Abstract
The highly precise synchrophasor measurements obtained from the phasor measurement unit (PMU) are important for an effective implementation of a wide-area monitoring, protection, control, and self-healing (WAMPCAS) power system. The overall performance of the WAMPCAS power system can be improved if the PMUs are installed at all the buses in a transmission network. However, the multistage PMU installation is obligatory as PMU installation at all network buses is a matter of large-scale investment. Priority should be given to the important buses during the initial and intermediate stages to obtain relatively better observability. The optimal PMU installation (OPI) should be determined at the preliminary stage to measure the voltage phasors of all buses with the least number of PMUs. To evaluate the OPI problem, an improved binary shuffled frog leaping algorithm (IBSFLA) was proposed for the IEEE 118-bus test system. To enhance the overall performance of the IBSFLA and to obtain possible multiple optimal solutions (MOSs), an improved initialization and similarity-checking assessment were developed. A bus-observability maximization was mathematically modeled to select the best solution from MOSs, and the efficacy of the proposed algorithm was verified by comparing its performance with other algorithms.
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