Abstract
During the last few decades many blackouts have occurred throughout the world. It seems that modern power systems are more vulnerable to major blackouts. Power system in Pakistan is no exception where blackouts affect the economy and hinder the development of the country. Pakistan Electric Power Company (PEPCO) is responsible for generation, transmission, and distribution of electric power in Pakistan. Major blackouts occur due to failure of the protection system of the power transmission network. The remedy for such collapses is disconnection of non-preferred load through Intelligent Load Shedding (ILS) technique. In this paper, the Intelligent Load Shedding is simulated in Electrical Transient Analysis Program (ETAP) software. The technique has been applied on 220kV transmission network of Quetta Electric Supply Company (QESCO), a power distribution company in Balochistan province of Pakistan. This paper focuses on preventing entire QESCO network from cascaded tripping and blackout during N-2 contingency situations. It has been established that implementation of Intelligent Load Shedding is not only helpful for protecting the transmission network of the distribution company, like QESCO, from blackout, but also protects smart grid from blackouts and other power collapses.
Highlights
Electrical power nowadays is considered as the life line for any society
The load flTohwealonaadlyfsloiswaaftnearlyimsipslaefmteernimtaptiloenmoefntILatSioinnoEf TILASPinisEsThAoPwnisisnhToawbnlein-5Twabhliele-5thwehSileintghlee SLiinngeleDLiaingeraDmiahgirgahmlighting the active loadhsigishlgigivhetinginthFeigaucrteiv-2e.loTahdesreissuglitvseonfinloaFdiguflorew-2a.nTahlyesrisesaunltds SoLf Dloasdhoflwows tahnaat lwysitihs aimnpdleSmLDenstahtoiownsothf aILt Switthhe blackou of QESCOimnpeltewmoerkntcaotiuolnd obfeILaSvothideebdla. cTkhoeutporef fQerErSedCOloandetiwsosrtkillceonueldrgbiezeadvowidheilde. tThheenporne-feprreefedrlroeaddloisasdtililsesnheergdizaesddefined in load prioritwy htailbeleth.e non-preferred load is shed as defined in load priority table
Through Intelligent Load Shedding (ILS) non-preferred load of a power system has been disconnected to avoid the tripping of whole power utility network
Summary
Electrical power nowadays is considered as the life line for any society. Unavailability of uninterrupted electric power results in failure of public transport system, traffics jams, educational institution outages, breakdown of industries and so on. The concept of intelligent load shedding is simulated through Electrical Transient Analysis Program (ETAP). Intelligent Load Shedding (ILS) is the process of optimal and fast disconnection of non-preferred load from a po keep the rest of the system operational (Yagami and Ichinohe, 2017). Intelligent Load Shedding (ILS) is the process of optimal and fast disconnection of non-preferred load from a power system to keep the rest of the system operational (Yagami and Ichinohe, 2017).
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