Fast decoupled power flow for unbalanced radial distribution systems

Abstract

This paper presents a novel power flow formulation and an effective solution method for general unbalanced radial distribution systems. Comprehensive models are considered including lines, switches, transformers, shunt capacitors, cogenerators, and several types of loads. A new problem formulation of three-phase distribution power flow equations taking into account the radial structure of the distribution network is presented. A distinguishing feature of the new problem formulation is that it significantly reduces the number of power flow equations, as compared with the conventional formulation. The numerical properties as well as the structural properties of distribution systems are exploited resulting in a fast decoupled solution algorithm. The proposed solution algorithm is evaluated on three-phase unbalanced 292-bus and 394-bus test systems with very promising results.

Reliability Indices Evaluation of a Real Time Rural Radial Distribution Feeder

“…It is observed that the computed energy losses closely match ing the calculated energy (real time data) losses. The voltage profile for single and multiple placement using PSO Before_Min_V=0.8848 Rank= 5,4,7,6,11,10,17,16,14,13,12,15,23,8,9,32,3639,25,33,19,20,29,31,35,38,28,26,34,18,24,37,21,30,27,22 Rank= , 4,7,6,11,10,17,16,14,13,12,15,23,8, 9,32,36,39,25,33,19,20, The details of the distribution system are shown in Table VII. There are 5 interruption cases during the year 2011-2012 (Table IX).…”

“…In this section, the development procedure will be described in detail. For distribution networks, the equivalent current-injection based model is more practical [5][6][7][8][9][10][11][12][13]. For bus, the complex load S is expressed by S i =P i +jQ i ------------(4) Where i = 1, 2, 3… N And the corresponding equivalent current injection at the -kth iteration of solution is …”

Solusi Aliran Daya Untuk Sistem Distribusi Tak Seimbang dengan Menggunakan Metode Trust-Region

“…[1][2][3][4][5]. Para peneliti ini telah mengusulkan metode atau teknik yang didasarkan pada skema iteratif Newton-Raphson.…”

A Three-phase Hybrid Power Flow Algorithm for Meshed Distribution System with Transformer Branches and PV Nodes

“…During the past decade, several power flow algorithms have been developed [1][2][3][4][5][6][7][8][9][10][11]. The most popular estimation algorithm is the forward/backward sweep based method for its fully utilizing the distribution network structure characteristics, simple programming, no large matrix calculation and fast computing speed [6][7][8][9][10][11].…”