| Author: | Hassan, F F; Balasubramanian, R; Bhatti, T S |
| Advisor: | Advisor |
| Date: | 1999
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| Publisher: | |
| Citation: | Generation
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| Series/Report no.: |
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| Item Type: | Article
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| Keywords: | steam turbines; fast valving scheme; nuclear power plant; rotor angle damping |
| Abstract: | A new fast valving scheme of steam turbines using two parallel valves for improving the transient stability of a power system is proposed. The influence of the actuation time parameters of a conventional fast valving scheme using a single valve is first studied in detail to justify the need for a parallel valve scheme. A systematic procedure for selecting suitable valve actuation times, the sequence and the conditions to be monitored for implementing a coordinated parallel valve actuation scheme is presented. The proposed scheme is applied to a typical nuclear power plant connected to an infinite busbar system. A four stroke valve operation mode of the scheme is found to improve the second and subsequent swing stability significantly. A multiple stroke operation mode of the scheme for improving the rotor angle damping over a longer period of transient is also presented |
