The Method for Static Voltage Margins Computing of Guizhou Power Grid During the 13th Five-Year Plan Period
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Abstract
The static voltage stability margin is an important index to assess the static stability of power systems. It′s not only the significant basis of computing transmission capacities between regional power systems under the limit of voltage stability, but also the significant reference point for power systems to decide whether to adopt preventative measures. The 13th five-year plan of Guizhou power grid and relevant researches demand to compute the static voltage stability margins of Guizhou power gird during the 13th five year plan period. But current static voltage stability margin analyzing tools such as VSAP have certain limits in capable computing node numbers, which can′t satisfy the demand of computing the static voltage margins of Guizhou power grid .Thus , it′s necessary to find a new path to obtain the static voltage stability margins of Guizhou power grid. This paper puts forward a computing method using both PSD-BPA and MATLAB. PSD-BPA is mainly for system equivalent reduction, while MATLAB program is optimal power flow method responsible for computing the static voltage stability margins. The computing results demonstrate the feasibility and effectiveness of the method which can be further applied in the static voltage stability margins computing work in other provincial level power girds and regional power grids.
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