A New Approach for Load Shedding Aimed at Improving Voltage Security Margin Using ZL/XTh Index

Publish Year: 1389
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:

PSC25_035

تاریخ نمایه سازی: 24 بهمن 1390

Abstract:

Load shedding is generally considered as a precautionary measure when voltage collapse is anticipated and can potentially result in blackout conditions. This countermeasure is used as the ultimate strategy to stop the blackout propagation into the rest of the network. In this paper, a new approach for load shedding against voltage collapse based on evaluation of voltage security margin is presented. In this approach, a new load shedding index namely load-to-source impedance ratio (ZL/XTh) is proposed for recognizing the most critical load buses from short term voltage instability point of view. A relatively large value of ZL/XTh index indicates an improved system voltage security. In order to improve the power system’s voltage security margin, the most effective buses with the least value of ZL/XTh index are chosen for implementing load shedding. The proposed approach has been implemented in Iran’s North Transmission Network with promising results demonstrating its effectiveness and applicability.

Authors

M.R Aghamohammadi

Iran Dynamic Research Center Power & Water University of Technology (PWUT) Tehran-Iran

S Hashemi

Iran Dynamic Research Center Power & Water University of Technology (PWUT) Tehran-Iran

M.T Barforooshi

Mazandaran Regional Electric Company Mazandaran-Iran

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