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As wind power achieves higher penetration levels and becomes a more and more substantial portion of our electric energy supply, more stringent requirements are being placed on wind plants. As wind plants displace traditional synchronous generators in terms of percentages, the wind plants must also do their part to maintain stability and reliability of the power system. Modern power electronics are...
In the practical power system operation, sometimes, some reasons will lead to local power network splitting, generate islanded power network operating. In order to ensure islanded power network operation safety and stability, it is urgently need to know power flow distribution for islanded power network. However, conventional power flow model can't reflect the important features for islanded power...
Reactive power management is essential for reliable power system operation, and also affects economic efficiency of real power dispatch. Proper compensation for providing reactive power and reactive power capability ensures an adequate, reliable and efficient supply of reactive power, and encourages sufficient investment on producing reactive power. This panel will review the reactive power management...
This paper presents an evaluation technique incorporating the impact of the diversified demand side load shift on the system reliability and nodal reliabilities of restructured power systems. In this technique, demand and price correlations are represented using a demand-price elasticity matrix which consists of self/cross-elasticity coefficients. The diversity of customers is represented using different...
This paper describes the recent developments and proposals for Ancillary Services trading between Southern African Power Pool (SAPP) members. Ancillary services are the services, apart from energy, required to maintain reliability of the interconnected power system. Reactive power and operating reserve services maintain voltage and frequency of the interconnection within acceptable levels and in the...
Investigations of recent blackouts indicate that the root cause of almost all major power system disturbances is voltage collapse rather than the underfrequency conditions prevalent in the blackouts of the 1960s and '70s. This paper explores the nature of recent power system blackouts (2003 east coast, 1996 California and others) and explains why voltage is the leading edge indicator of impending...
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