Category: MODERN POWER SYSTEM

Forecasting Methodology

Forecasting Methodology: Forecasting Methodology may be divided into three broad classes. Techniques may be based on extrapolation or on correlation or on a combination of both. Techniques may be further classified as either deterministic, probabilistic or stochastic. Extrapolation Extrapolation techniques involve fitting trend curves to basic historical data adjusted to reflect the growth trend itself. […]

Introduction to Load Forecasting Technique

Introduction to Load Forecasting Technique: Introduction to Load Forecasting Technique – Load forecasting plays an important role in power system planning, operation and control. Forecasting means estimating active load at various load buses ahead of actual load occurrence Planning and operational applications of load forecasting requires a certain ‘lead time’ also called forecasting intervals. Nature […]

Facts Controllers

Facts Controllers: The development of FACTS controllers has followed two different approaches. The first approach employs reactive impedances or a tap changing transformer with thyristor switches as controlled elements, the second approach employs self-commutated static converters as controlled voltage sources. In general, FACTS controllers can be divided into four categories. (i) series (ii) shunt (iii) […]

Principle Operation of Converters

Principle Operation of Converters: Principle Operation of Converters – Controllable reactive power can’be generated by dc to ac switching converters which are switched in synchronism with the line voltage with which the reactive power is exchanged. A switching power converter consists of an array of solid-state switches which connect the input terminals to the output […]

Flexible AC Transmission Systems

Flexible AC Transmission Systems: Flexible AC Transmission Systems – The rapid development of power electronics technology provides exciting opportunities to develop new power system equipment for better utilization of existing systems. Since 1990, a number of control devices under the term FACTS technology have been proposed and implemented. FACTS devices can be effectively used for […]

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