A novel and fast three-phase load flow for unbalanced radial distribution systems

被引:68
作者
Teng, JH [1 ]
Chang, CY [1 ]
机构
[1] I Shou Univ, Dept Elect Engn, Kaohsiung, Taiwan
关键词
branch voltage; current injection mismatches; Newton-Raphson method; three-phase load flow; unbalanced distribution system;
D O I
10.1109/TPWRS.2002.805012
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
A novel and fast three-phase load flow algorithm for unbalanced radial distribution systems is proposed in this paper. The proposed method uses branch voltages as state variables and employs the Newton-Raphson (NR) algorithm to solve the load flow problem. By utilizing branch voltages as state variables, a constant Jacobian matrix can be obtained, and a. building algorithm for Jacobian matrix is then developed from the observation of the constant Jacobian matrix. A solution technique, which takes the network structure into account to avoid the time-consuming lower and upper triangular (LU) factorization, is also developed. Since the factorization procedure can be avoided, the proposed method can save computation time. For any power system equipment, if its equivalent current injection or admittance matrix can be obtained, it can be integrated into the proposed method. Test results demonstrate that by integrating the Jacobian building algorithm and efficient solution technique, the proposed method is an effective three-phase load now method and has great potential for real-time use.
引用
收藏
页码:1238 / 1244
页数:7
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