Title :
Distribution factors of reactive power flow in transmission line and transformer outage studies
Author :
Lee, Ching-Yin ; Chen, Nanming
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Inst. of Technol., Taipei, Taiwan
fDate :
2/1/1992 12:00:00 AM
Abstract :
The authors present a fast and accurate method to calculate a set of distribution factors of reactive power flow for transmission line and transformer outage studies. The transmission branches are broken into two categories: transmission lines and transformers. Separate formulas are derived to calculate the distribution factors of the reactive power flow. A transmission line model is developed. The reactive power flow in a line is divided into two parts: the transmission part and the loss part. Based on this model, transmission line outages were simulated by power injections which cancel the reactive power flow in the outage lines. Formulas to calculate the distribution factors of the reactive power flow are derived using the decoupled load flow characteristic, network sensitivities, and the principle of superposition. The formulas to calculate the distribution factors of the reactive power flow in transformers are also derived
Keywords :
load flow; power transformers; power transmission lines; reactive power; decoupled load flow characteristic; distribution factors; network sensitivities; power injections; reactive power flow; transformer outage; transmission line outage; Control systems; Load flow; Personnel; Power system analysis computing; Power system planning; Power transmission lines; Reactive power; Reactive power control; Real time systems; Voltage control;
Journal_Title :
Power Systems, IEEE Transactions on
