An optimal control to improve transient stability of multi-machine power system

Journal Article · Mon Mar 01 04:00:00 EST 1982 · Electr. Eng. Jpn. (Engl. Transl.); (United States)

DOI:https://doi.org/10.1002/ecja.4391020214· OSTI ID:5417646

Yamashita, K; Okano, K; Tanoguchi, T

The authors proposed previously an optimal control method to stabilize the power system under large disturbance. This method is based on Lyapunov function and only those feedback signals are used which are given by the time differentiated state variables. In this paper, the discussion is extended from the earlier paper using the extended Lyapunov function and feedback signals which are represented by state variables. Mathematically speaking, the results of the earlier paper are extended by performing some additional matrix operations. The feedback signal is given by a linear combination of state variables (e.g., phase differences between machines) and time differentiated state variables (e.g., generator speed). The time derivative of the extended Lyapunov function is expressed as a quadratic form of feedback gains and the optimal gains are derived by the quadratic form minimization technique. All the nonlinearities of the analyzed system are always retained. Effectiveness of the proposed control scheme is demonstrated by digital computer simulation of three-machine system subject to a large disturbance.

• Research Organization: Univ. of Osaka Prefecture, Japan
• OSTI ID: 5417646
• Journal Information: Electr. Eng. Jpn. (Engl. Transl.); (United States), Journal Name: Electr. Eng. Jpn. (Engl. Transl.); (United States) Vol. 12:2; ISSN EENJA
• Country of Publication: United States
• Language: English

Related Subjects

200300* -- Electric Power Engineering-- Power Transmission & Distribution-- (-1989)
24 POWER TRANSMISSION AND DISTRIBUTION
COMPUTERIZED SIMULATION
CONTROL SYSTEMS
ELECTRICAL TRANSIENTS
ENERGY SYSTEMS
POWER SYSTEMS
SIMULATION
STABILITY
TRANSIENTS
VOLTAGE DROP