Abstract
Flexible AC transmission system (FACTS) has the control characteristics of efficiency, flexibility and reliability. The introduction of FACTS in power system is superior to any other control methods, and different FACTS devices have different features. In this paper, a comprehensive evaluation index system is developed to study a variety of comparisons on different FACTS devices. The proposed index takes power flow controllability as its main indicator, and loss reduction, static voltage stability improvement and load shedding reduction as complementary indicators. Finally, the peak load case in 2016 of a province is adopted for case studies. The results not only show that the proposed comprehensive evaluation index is systematic, scientific, practical, but also show the superiority of unified power flow controller (UPFC).
Highlights
At present, the primary equipments of grid framework are mainly based on the electromagnetic and mechanical technology
Based on the above discussion, this paper proposed a new comprehensive evaluation index, which takes power flow controllability as its main indicator, and loss reduction, static voltage stability improvement and load shedding reduction as complementary indicators
The continuation power flow method is adopted in this paper to study the performance of Flexible AC transmission system (FACTS) in improving voltage stability
Summary
The primary equipments of grid framework are mainly based on the electromagnetic and mechanical technology. The core idea of FACTS is to enable the system electric parameters (such as voltage, phase angle and impedance) to change fast and flexibly under the premise of keeping the security, stability and reliability of power system, making the most of existing resources for distributing transmission power reasonably, reducing power loss and cost and improving the efficiency of the power grid operation [2]. UPFC is by far the most powerful FACTS and has a broad application prospect It can improve the power flow distribution effectively, and improve the stability of power system. Based on the above discussion, this paper proposed a new comprehensive evaluation index, which takes power flow controllability as its main indicator, and loss reduction, static voltage stability improvement and load shedding reduction as complementary indicators.
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