Journal of Zhejiang University SCIENCE A
ISSN 1673-565X(Print), 1862-1775(Online), Monthly

2009   Vol. 10   No. 6   p. 868~876

Mixed nonlinear dynamic voltage phasor tracing method based on WAMS/SCADA

Xiao-gang CHEN^1,2, Yong-hui YI¹, Wei WANG³, Quan-yuan JIANG^†‡1, Chuang-xin GUO¹, Yi-jia CAO¹

(¹School of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)
(²Hangzhou Electric Power Bureau, Hangzhou 310009, China)
(³Zhejiang Provincial Electric Power Company, Hangzhou 310007, China)
^‡ Corresponding Author
^†E-mail: jqy@zju.edu.cn
Received Mar. 4, 2008; revision accepted July 8, 2008; Crosschecked Apr. 10, 2009

Abstract: By considering the static voltage characteristic of the load, we propose a WAMS/SCADA mixed nonlinear method to estimate the voltage of unobservable buses caused by topology change or phasor measurement unit (PMU) malfunction in a power system. By modeling the load characteristic with data from SCADA, we employed the Gauss-Seidel method to solve the nonlinear equations and estimate the voltage of unobservable buses with the high precision voltages of neighboring buses measured by a PMU. Simulations were carried out on the IEEE 39-bus system, and the results show that this novel method can dynamically and accurately trace the variation of the voltage phasor of the unobservable buses.

Key words: Wide area measurement system (WAMS), Supervisory control and data acquisition (SCADA) system, Observability, Dynamic tracing, Nonlinear equation
doi:10.1631/jzus.A0820150             CLC number: TM734

References:

[1] Baldwin, T.L., Mili, L., 1993. Power system observability with minimal phasor measurement placement. IEEE Trans. Power Syst., 8(2):707-715.

[2] Chaudhuri, B., Majumder, R., Pal, B., 2004. Wide-area measurement-based stabilizing control of power system considering signal transmission delay. IEEE Trans. Power Syst., 19(4):1971-1979.

[3] Chen, J., Abur, A., 2006. Placement of PMUs to enable bad data detection in state estimation. IEEE Trans. Power Syst., 21(4):1608-1615.

[4] Han, Z.X., 1993. Power System Analysis. Zhejiang University Press, Hangzhou, China (in Chinese).

[5] Huang, K.S., Wu, Q.H., Turner, D.R., 2002. Effective identification of induction motor parameters based on fewer measurements. IEEE Trans. Energy Conv., 17(1):55-60.

[6] Li, Y., Chiang, H.D., Choi, B.K., Chen, Y.T., Huang, D.H., Lauby, M.G., 2007. Representative static load models for transient stability analysis: development and examination. IET Gener. Trans. Distrib., 1(3):422-431.

[7] Milosevic, B., Miroslavca, B., 2003. Voltage-stability protection and control using a wide-area network of phasor measurement. IEEE Trans. Power Syst., 18(1):121-127.

[8] Okou, F., Dessaint, L., Akhrif, O., 2005. Power systems stability enhancement using a wide-area signals based hierarchical controller. IEEE Trans. Power Syst., 20(3):1465- 1477.

[9] Peng, J.N., Sun, Y.Z., Wang, H.F., 2006. Optimal PMU placement for full network observability using tabu search algorithm. Int. J. Electr. Power Energy Syst., 28(4):223-231.

[10] Quintero, J., Venkatasubramanian, V., 2005. A Real-time Wide-area Control Framework for Mitigating Small-signal Instability in Large Electric Power Systems. Proc. 38th Hawaii Int. Conf. on System Sciences, p.1-10.

[11] Rehtanz, C., Bertsch, J., 2002. Wide Area Measurement and Protection System for Emergency Voltage Stability Control. Proc. Power Engineering Society Winter Meeting, p.842-847.

[12] Reynaldo, F.N., 2001. State Estimation and Voltage Security Monitoring Using Synchronized Phasor Measurements. PhD Thesis, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA.

[13] Yang, G.Y., Jiang, D.Z., Qiu, J.J., 2003. Synchronous measurement precision of phasor measurement unit. Autom. Electr. Power Syst., 27(14):57-61.

[14] Zima, M., Krause, T., Andersson, G., 2003. Evaluation of System Protection Schemes, Wide Area Monitoring and Control Systems. Proc. 6th Int. Conf. on Advances in Power System Control, Operation and Management, 2:754-759.