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Power factor correction has always been challenging task. Most of electrical energy is wasted due to leading and lagging power factor. Thyristor switch modules are widely used in the rolling mills where more fluctuating load is available. The thyristor switch module with the reactor and capacitor is usedfor the compensating the reactive power in electrical power system. Automatic power factor correctionunit is required to keep unity power factor and optimize current consumption. Harmonics is reduced by connecting detuned reactor/inductor in series with capacitor and thyristor switched module. This paper shows design and hardware implementation of thyristorised automatic power factor correction unit for three phase circuit in an industry. The unit is flexible to maintain nearly unity power factor. The outcome is confirmed and acquired that the recommended circuit is perfect to produce improved output.

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In stressed electric power systems, due to increased loading or due to severe contingencies often lead to situation where system no longer remains in the secure operating region. FACTS devices can play very important role in power system security enhancement. Due to high capital investment, it is necessary to locate these devices optimally in the power system. The scope of this paper is to decide optimal location of Thyristor controlled series compensator (TCSC) by a real power flow performance index sensitivity based approach & line outage distribution factor. The effectiveness of the proposed controller has been tested on modified IEEE 30 bus system using Power world simulator software version 12.0.