Evaluation Techniques for the Voltage Unbalance due to Railway Demand

전철부하에 기인된 계통 전압불평형 평가기법

This paper presents an algorithm to estimate voltage unbalance which is due to railway demand, and which is most troublesome to polyphase motors. For the sake of accuracy, a circuit analysis procedure is introduced in this algorithm. The circuit analysis procedure enables the algorithm to produce a voltage and current profiles as well as unbalance indices. The proposed algorithm is applied to the test system(standard AT fed system) for the analyses of unbalance phenomena. The result shows that the algorithm is useful in the field of railway system planning.