Adaptive Pi Control of Statcom for Voltage Regulation
Journal Title: IOSR Journals (IOSR Journal of Electrical and Electronics Engineering) - Year 2017, Vol 12, Issue 4
Abstract
Static compensator (STATCOM) can provide fast and efficient reactive power support to maintain power system voltage stability. In the literature, various STATCOM control methods have been discussed including many applications of proportional-integral (PI) controllers. However, these previous works obtained the PI gains via a trial-and-error approach or extensive studies with a tradeoff of performance and applicability. Hence, control parameters for optimal performance at a given operating point may not be as effective at a different operating point. This paper proposes a new control model based on adaptive PI control, which can self-adjust the control gains during a disturbance such that the performance always matches a desired response, regardless of the change of operating condition. Since the adjustment is autonomous, this provides the plug-and-play capability for STATCOM operation. In the simulation test, the adaptive PI control shows consistent excellence under various operating conditions, such as different initial control gains, different load levels, change of transmission network, consecutive disturbances, and a severe disturbance. In contrast, the conventional STATCOM control with tuned, fixed PI gains usually performs fine in the original system with a fuzzy logic controller, but may not perform as efficiently as the proposed control method when there is a change in system conditions.
Authors and Affiliations
Mr. G. Varaprasad, Dr. D. Obulesu
Keywords
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- EP ID EP388245
- DOI 10.9790/1676-1204040110.
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