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CLC number: TK263.7

On-line Access: 2008-02-23

Received: 2007-09-27

Revision Accepted: 2008-01-09

Crosschecked: 0000-00-00

Cited: 3

Clicked: 3634

Citations:  Bibtex RefMan EndNote GB/T7714

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Journal of Zhejiang University SCIENCE A 2008 Vol.9 No.5 P.633~639

http://doi.org/10.1631/jzus.A0720017


Research on new type of fast-opening mechanism in steam turbine regulating system and optimization of operation tactic


Author(s):  Xiao-xiao LI, Xuan-yin WANG, Fu-shang LI

Affiliation(s):  The State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China; more

Corresponding email(s):   xywang@zju.edu.cn

Key Words:  Steam turbine, Fast-opening, Regulating system, AMESIM


Xiao-xiao LI, Xuan-yin WANG, Fu-shang LI. Research on new type of fast-opening mechanism in steam turbine regulating system and optimization of operation tactic[J]. Journal of Zhejiang University Science A, 2008, 9(5): 633~639.

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author="Xiao-xiao LI, Xuan-yin WANG, Fu-shang LI",
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year="2008",
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doi="10.1631/jzus.A0720017"
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%A Fu-shang LI
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A0720017


Abstract: 
With the analysis on regulating system in 200 MW steam turbine, the necessity of appending the fast-opening function to the original system is set forth and a new type of fast-opening mechanism is devised. The mathematical model of system is built up. With the use of AMESIM software, the displacement curve of the piston, the force curve of the cartridge valve spool, the pressure curve and the flux curve in the regulation process are obtained based on simulation. The performances of three fast-opening systems composed of cartridge valves with different diameters are compared. Based on the analysis on factors that affect the execution time of fast-opening, the dead zone of the fast-opening system is put forward. To overcome the defect, different operation modes are adopted for different zones. The result shows that with the increase of the valve diameter, the regulating time in the dead zone significantly exceeds the fast-opening time in the whole journey. Accordingly, the optimization operation tactic in the dead zone and the qualification conditions are brought forward. The fast-opening system composed of 32 mm cartridge valves is taken as an example with use of the tactic. The simulation result shows that the maximum regulating time is shortened by 509 ms.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

[1] Chen, Q., Tan, S.H., Han, Y.D., Wang, Z.H., 1995. Fast valving control using radial-basis function neural network. Proceedings IEEE International Conference on Neural Networks, 5(11):2247-2251.

[2] Delfino, B., Denegri, G.B., Invernizzi, M., Pinceti, P., 1988. Estimating first swing stability of synchronous machines as affected by saturation and controls. IEEE Transactions on Energy Conversion, 3(3):636-646.

[3] Hassan, F.F., Balasubramanian, R., Bhatti, T.S., 1999. Fast valving scheme using parallel valves for transient stability improvement. Proceedings IEE Generation Transmission and Distribution, 146(3):330-336.

[4] Karady, G.G., Mohamed, M.A., 2002. Improving transient stability using fast valving based on tracking rotor-angle and active power. Power Engineering Society IEEE Summer Meeting, 3(7):1576-1581.

[5] Kundur, P., Paserba, J., Vitet, S., 2003. Overview on definition and classification of power system stability. Quality and Security of Electric Power Delivery System, 8(10):1-4.

[6] Li, F.S., Wei, J.H., 2003. A study on the electro-hydraulic control systems based on the new type valve for steam turbines fast valving. Turbine Technology, 45(3):170-173 (in Chinese).

[7] Lu, Y.X., 2002. Hydraulic and Pneumatic Technology Manual. Mechanical Industry Press, Beijing, p.406-407 (in Chinese).

[8] Park, R.H., 1973. Fast turbine valving. IEEE Transaction on Power Apparatus and Systems, 92(3):1065-1073.

[9] Patel, R., Bhatti, T.S., Kothari, D.P., 2002. A novel control logic for fast valving operations. Power Engineering Review, 22(10):43-46.

[10] Xiao, Z.H., Zhou, H., Zhu, Q.C., 2005. Study of fast valving control based on nonlinear model predictive control. North China Electric Power, 8:17-19 (in Chinese).

[11] Yu, D.R., Yang, Y.B., Cui, T., Huang, T., 2002. Optimal robust fault-tolerance fast valving control system design via large-scale linearization. Proceedings of the CSEE, 22(9):25-29 (in Chinese).

[12] Zhang, L.Z., Kang, J.P., Lin, X.S., Xu, Y.H., 2000. Application of neural networks trained with an improved conjugate gradient algorithm to the turbine fast valving control. International Conference on Power System Technology, 3(12):1679-1682.

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