Optimal Multiplier Method and its Application in Power Flow Calculation for AC/DC Power Grids

doi:10.11930/j.issn.1004-9649.201801020

Abstract

Abstract: The optimal multiplier method has been widely applied to practical power system problems, due to its high convergence reliability, the superior performance in dealing with ill-conditioned power flow, and the ability to find the least square solution for infeasible power flow equations. In this paper, the steady-state equivalent model of voltage source converters (VSCs) in the rectangular coordinate system is established, transforming the power flow calculation problem of AC/DC power grids into cracking a set of quadratic equations, which decouples the model and solution methodology of power flow calculation, and reduces the complexity of the corresponding computer programs. To deal with non-convergence issue in large-scale AC/DC power flow calculation, a unified iteration model is proposed to improve the convergence performance considering multi-slack generators and multi-generator coordinated voltage regulation. Simulation results of Fujian power grid with the Xiamen VSC-HVDC project validate the effectiveness of the proposed models and methods.

Key words: voltage source converter, AC/DC power grid, power flow calculation, quadratic equations, optimal multiplier method

CLC Number:

TM761

FANG Chaoxiong. Optimal Multiplier Method and its Application in Power Flow Calculation for AC/DC Power Grids[J]. Electric Power, 2018, 51(6): 107-112.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201801020

https://www.electricpower.com.cn/EN/Y2018/V51/I6/107

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