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Power flow control using Distributed-FACTS provides a reliable substitute to power flow control using lumped FACTS controllers which employs high rated power electronics devices. Lumped FACTS controllers becomes very costly and reliability is also less. DSSC advantage is that it provides power flow control in cost effective and more reliable way. Distributed Static Series Compensator (DSSC) is one of the Distributed series FACTS controller employing single phase low power inverter like SSSC. Multiple number of DSSC devices is required to connect on the line to achieve noticeable current change in the line. In this paper, optimal DSSC placement in the existing line is implemented to minimize reactive power generation. System studies are presented on IEEE-14 bus system and TNEB 69 bus system.
Electricity consumption is increasing day by day and generation is also increasing to match increased load demand. Whereas, Transmission network is not spread in that proportion of increased generation. As a result, existing transmission network is working either overloaded or near to its thermal limit. It may happen that some of the lines are still operating underloaded. FACTS controllers help to control power flow in the lines. FACTS controllers conventionally consists of inductor and capacitor elements. TCSC and SVC are the popular conventional FACTS controllers. New age FACTS controllers are VSC based and it is implemented with high power electronics switches. STATCOM is one of the VSC based FACTS controller gives wide power flow control. But these lumped FACTS controllers are very costly; reliability is also less . Distributed FACTS controllers provide a replacement for lumped FACTS controllers.
In this paper, multiple DSSC devices are demonstrated in optimal way for active power flow control. Optimization is applied to find out emulated reactance by DSSC. An optimal location of DSSC placement is investigated to minimize reactive power generation with optimum emulated reactance. It can be concluded; reactive power generation is minimized considerably. Results are demonstrated on IEEE 14 bus system and TNEB 69 bus system.
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