【摘要】 本文介绍一种随负荷变化的直流潮流原理的B系数算法。利用两个电网的实际数据,在经济调度模拟试验系统上将此算法与当前几种主要网损修正算法(最小二乘法B系数、直流潮流原理B系数和利用Jacobian矩阵计算网损微增率的算法等)进行了比较试验。试验结果表明:随负荷变化的直流潮流原理B系数法适合我国电力系统负荷和无功功率的运行特点,能够快速计算出较高精度的网损及其微增率。更多还原

【Abstract】 Presented in this paper is the study result of the algorithm for computing the transmission loss and incremental losses of the power system. It is for the purpose to select the proper method suitable for the actual conditions of the power system in our country.The new algorithm of B coefficient varying with system load and based upon the principle of D.C. load flow is introduced in particular in this paper. First of all, computing several sets of B coefficient based upon the principle of D.C. load flow corresponding with the different levels of load, then regressing one set of B coefficient according to the system load. Among which, BGG is the constant term, BGO is the linear term of the B coefficient varying with the system load (eq.8) and Boo is the quadratic term of the B coefficient varying with the system load (eq. 9).To direct on the actual data of two power systems (tab.2 and 3), using the simulation test system of the economic dispatch of power system, comparisons with the several principle approaches of loss formula coefficient are presented, such as B coefficient based upon the method of least squares, B coefficient based upon the principle of D.C.load flow and loss formula coefficient by use of the Jacobian matrix. Results show that the new algorithm of B coefficient varying with the system load and based upon the principle of . D. C. load flow is very applicable to the operation characteristic of load and reactive power in our power system. It has obvious advantages on the calculating accuracy of the incremental losses (tab.4) and transmission loss (tab.5) and also on the saving computation time required (tab.6.).更多还原