| 摘要 |
PURPOSE: A method for estimating the state of a power distribution system is provided to accurately check current problems by checking the current state of the power distribution system based on a mathematical analysis result after performing an accurate power flow calculation algorithm. CONSTITUTION: Injection power of a substation is set. A voltage of a load bus line is set as 1.0 pu. Unknown load power is set as load capacity. An active power assignment coefficient and reactive power assignment coefficient for load distribution are set as 1. Power flow calculation is performed after load distribution by state estimation. [Reference numerals] (AA) Start; (BB,KK) Setting unknown load power; (CC) Calculating bus power; (DD) Inputting data; (EE,OO) Calculating a loss function; (FF) Forming Ybus of a system; (GG) Initial stage; (HH) Setting an initial value of the system; (II) Calculating a load power assigned coefficient; (JJ) Calculating a voltage V_NL by a voltage source; (LL) Distributing load; (MM) Repeated calculation step; (NN) Calculating power flow; (PP) Calculating an injection current of a load bus; (QQ) Loss function convergence?; (RR) Calculating a voltage by a current source; (SS) Outputting a result; (TT) End; (UU) Synthesizing a voltage result; (VV) Power flow calculation convergence? |
