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http://dx.doi.org/10.5302/J.ICROS.2013.12.1856

Innovative Model-Based PID Control Design for Bus Voltage Regulation with STATCOM in Multi-Machine Power Systems  

Kim, Seok-Kyoon (Korea University)
Lee, Young Il (Seoul National University of Science and Technology)
Song, Hwachang (Seoul National University of Science and Technology)
Kim, Jung-Su (Seoul National University of Science and Technology)
Publication Information
Journal of Institute of Control, Robotics and Systems / v.19, no.4, 2013 , pp. 299-305 More about this Journal
Abstract
The complexity and severe nonlinearity of multi-machine power systems make it difficult to design a control input for voltage regulation using modern control theory. This paper presents a model-based PID control scheme for the regulation of the bus voltage to a desired value. To this end, a fourth-order linear system is constructed using input and output data obtained using the TSAT (Transient Security Assessment Tool); the input is assumed to be applied to the grid through the STATCOM (STATic synchronous COMpensator) and the output from the grid is a bus voltage. On the basis of the model, it is identified as to which open-loop poles of the system make the response to a step input oscillatory. To reduce this oscillatory response effectively, a model-based PID control is designed in such a way that the oscillatory poles are no longer problematic in the closed loop. Simulation results show that the proposed PID control dampens the response effectively.
Keywords
power system; bus voltage regulation; model estimation; optimization; PID control; TSAT;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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