Abstract
This paper proposes a new hybrid optimization method for the phase-frequency characteristics of the double input power system stabilizer (PSS) based on the improved active set algorithm. This method takes the effect of the filtering section optimization on the parameter improvement into account, and the optimized model focuses on the minimum residual sum of squares between the actual and the target phase-frequency characteristics. The result shows that the improved parameters obtained from the proposed method provide much better phase-frequency characteristics than the widely used engineering parameters. The comparison between the proposed method and the typical commercial software indicates the universal superiority of the proposed method. And the studies on the impact of considering the filter section optimization on the phase-frequency improvement show that taking the filter section optimization into account will be beneficial for the phase-frequency improvement, though in application to the PSS2A model and the PSS2B model there are some differences. The achievements obtained in this paper provide a significant reference for the practical PSS parameter modification and improvement.
Highlights
With the fast development of the ultrahigh voltage grid, the high-capacity power transmission among different districts becomes more and more popular, resulting in the significant change of the low-frequency oscillation mode of the regional power grids [1, 2]
[5, 6, 8, 15], most optimization methods primarily focus on the parameter improvement of the phase shifters, while specific attention has been rarely paid to the DC blockers
Employing the commercial software power system stabilizer (PSS) Parameter Calculation Program which is widely used in China and the proposed method in this paper, respectively, to calculate the optimization parameters of 1# generator set in Dingzhou Power Plant, the results are shown in Table 5, and the phase-frequency
Summary
Received 28 July 2017; Revised 26 January 2018; Accepted 26 February 2018; Published 3 April 2018. This paper proposes a new hybrid optimization method for the phase-frequency characteristics of the double input power system stabilizer (PSS) based on the improved active set algorithm. This method takes the effect of the filtering section optimization on the parameter improvement into account, and the optimized model focuses on the minimum residual sum of squares between the actual and the target phase-frequency characteristics. The result shows that the improved parameters obtained from the proposed method provide much better phase-frequency characteristics than the widely used engineering parameters. The achievements obtained in this paper provide a significant reference for the practical PSS parameter modification and improvement
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