Category: MODERN POWER SYSTEM

Formation of YBUS By Singular Transformation

Formation of YBUS By Singular Transformation: Formation of YBUS By Singular Transformation – The matrix pair YBUS and ZBUS form the network models for load flow studies. The YBUS can be alternatively assembled by use of singular transformations given by a graph theoretical approach. This alternative approach is of great theoretical and practical significance and […]

Network Model Formulation

Network Model Formulation: Network Model Formulation – The load flow problem has, in fact, been already introduced in Chapter 5 with the help of a fundamental system, i.e. a two-bus problem (see Example 5.8). For a load flow study of a real life power system comprising a large number of buses, it is necessary to […]

Methods of Voltage Control

Methods of Voltage Control: Methods of Voltage Control – Practically each equipment used in power system are rated for a certain voltage with a permissible band of voltage variations. Voltage at various buses must, therefore, be controlled within a specified regulation figure. This article will discuss the two methods by means of which voltage at […]

Power Flow through a Transmission Line

Power Flow through a Transmission Line: Power Flow through a Transmission Line – So far the transmission line performance equation was presented in the form of voltage and current relationships between sending-and receiving-ends. Since loads are more often expressed in terms of real (watts/kW) and reactive (VARs/ kVAR) power, it is convenient to deal with […]

Equivalent Circuit of a Long Line

Equivalent Circuit of a Long Line: So far as the end conditions are concerned, the Equivalent Circuit of a Long Line can be established in the form of a T- or π-network. The parameters of the equivalent network are easily obtained by comparing the performance equations of a π-network and a transmission line in terms […]

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