DocumentCode :
3473247
Title :
PMU based voltage stability analysis for transmission corridors
Author :
Liu, Mingsong ; Zhang, Boming ; Yao, Liangzhong ; Han, Min ; Sun, Hongbin ; Wu, Wenchuan
Author_Institution :
Technol. Center, AREVA T&D, Stafford
fYear :
2008
fDate :
6-9 April 2008
Firstpage :
1815
Lastpage :
1820
Abstract :
A new equivalent model based on phaser measurement unit (PMU) is proposed to analyze and predict the voltage stability of a transmission corridor. This equivalent model retains all transmission lines in a transmission corridor, which is more detailed and accurate than traditional Thevenin equivalent model widely used. To estimate parameters of the proposed model, Newton method or the least square estimation method is adopted by using multiple continuous samples of PMU measurements. Based on the new model, an actual load increase direction is estimated real-time with PMU measurements, along which the load margin is calculated. The load margin is equal to the available transfer capacity (ATC) of the transmission corridor, and is used as a voltage stability index. The proposed model and algorithm have been tested on the IEEE 9-bus system. Compared with traditional Thevenin equivalent method, the proposed algorithm is more accurate and effective, and with acceptable computation burden.
Keywords :
Newton method; least squares approximations; power system stability; transmission networks; Newton method; available transfer capacity; least square estimation method; load margin; phasor measurement unit; transmission corridors; voltage stability analysis; Least squares approximation; Load modeling; Measurement units; Newton method; Parameter estimation; Phasor measurement units; Predictive models; Stability analysis; Transmission line measurements; Voltage; Available Transfer Capacity (ATC); Load Increase Direction; Phasor Measurement Unit (PMU); Thevenin Equivalence; Transmission Corridor; Voltage Stability;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electric Utility Deregulation and Restructuring and Power Technologies, 2008. DRPT 2008. Third International Conference on
Conference_Location :
Nanjuing
Print_ISBN :
978-7-900714-13-8
Electronic_ISBN :
978-7-900714-13-8
Type :
conf
DOI :
10.1109/DRPT.2008.4523701
Filename :
4523701
Link To Document :
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