基于二分法的高压直流输电系统可靠性最优分解

Reliability Optimal Distribution for HVDC Systems Using Bisection Method

直流输电系统可靠性最优分解有助于规划、设计人员优化选择元件的可靠性,以满足系统可靠性的要求,是直流输电工程设备招标、规划和设计等的重要辅助决策手段。论文给出直流输电系统可靠性最优分解的非线性规划模型,基于系统可靠性随元件可靠性参数单调递增的变化规律,提出高压直流输电系统可靠性最优分解的二分法求解算法。该方法把给定系统可靠性指标作为约束条件,应用二分法逐渐收敛到最优分解目标值,进而求出满足条件的元件可靠性参数值。用一单12脉接线高压直流输电系统进行了算例分析,在给定系统强迫能量不可用率、单极强迫停运率等指标下,算法均能快速地收敛得到最优分解结果。

Reliability optimal distribution（ROD） for high voltage direct current（HVDC） transmission systems can be used to choose reliability parameters of components to meet the requirement of a pre-specified system reliability performance.It is becoming an important means of decision-making for HVDC transmission project of bidding,planning and designing processes.Based on the property of the system reliability increasing with the reliability performance of components,this paper proposes a non-linear programming model for the ROD,which considers a wide range of constraints including the pre-specified system reliability.This model can be solved using the bisection method.Therefore,the optimal reliability parameters of components can be obtained.Case study of a HVDC transmission system of single 12-pulse was used to illustrate the performance of the proposed algorithm.A wide range of system reliability indices including the forced energy unavailability（FEA） and monopole forced outage times（MUOT） are the pre-specified indices.Results from the case study show that the method is feasible and effective.