Method for Enhancement of Power Quality at Point of Common Coupling of Wind Energy System
American Journal of Energy Engineering
Volume 1, Issue 1, March 2013, Pages: 11-21
Received: Apr. 4, 2013; Published: Mar. 10, 2013
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Jyothilal Nayak Bharothu, Associate professor of Electrical & Electronics Engineering, Sri Vasavi Institute of Engineering & Technology, Nandamuru, A.P.; India
AbduL Arif, Associate professor of Electrical & Electronics Engineering, Sri Vasavi Institute of Engineering & Technology, Nandamuru, A.P.; India
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In this paper a compensation strategy based on a particular Custom Power System (CUPS) device, the Unified Power Quality Compensator (UPQC) has been proposed. A customized internal control scheme of the UPQC device was developed to regulate the voltage in the WF terminals, and to mitigate voltage fluctuations at grid side. The voltage regulation at WF terminal is conducted using the UPQC series converter, by voltage injection “in phase” with point of common coupling (PCC) voltage. On the other hand, the shunt converter is used to filter the WF generated power to prevent voltage fluctuations, requiring active and reactive power handling capability. The sharing of active power between converters is managed through the common DC link. Therefore the internal control strategy is based on the management of active and reactive power in the series and shunt converters of the UPQC, and the exchange of power between converters through UPQC DC–Link. This approach increases the compensation capability of the UPQC with respect to other custom strategies that use reactive power only. The proposed compensation scheme enhances the system power quality, exploiting fully DC–bus energy storage and active power sharing between UPQC converters, features not present in DVR and D–STATCOM compensators. Simulations results show the effectiveness of the proposed compensation strategy for the enhancement of Power Quality and Wind Farm stability.
Cups, Upqc, Pcc, Dc Link, Wind Farm, Power Quality Etc
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Jyothilal Nayak Bharothu, AbduL Arif, Method for Enhancement of Power Quality at Point of Common Coupling of Wind Energy System, American Journal of Energy Engineering. Vol. 1, No. 1, 2013, pp. 11-21. doi: 10.11648/j.ajee.20130101.12
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