Advanced Voltage Support Scheme for Grid Balancing Under Active Power Oscillations
I Swetha Monica1, N Vani Annapurna Bhavani2, Praveen Kumar Bandila3
1I Swetha Monica, Department of Electrical & Electronic Engineering, Sagi RamaKrishnam Raju Engineering College, Bhimavaram (Andhra Pradesh), India.
2N Vani Bhavani, Department of Electrical & Electronic Engineering, Sagi RamaKrishnam Raju Engineering College, Bhimavaram (Andhra Pradesh), India.
3Praveen Kumar Bandila, Department of Electrical & Electronic Engineering, Sagi RamaKrishnam Raju Engineering College, Bhimavaram (Andhra Pradesh), India.
Manuscript received on 11 May 2019 | Revised Manuscript received on 05 June 2019 | Manuscript Published on 15 June 2019 | PP: 50-55 | Volume-8 Issue-1S3 June 2019 | Retrieval Number: A10100681S319/2019©BEIESP
Open Access | Editorial and Publishing Policies | Cite | Mendeley | Indexing and Abstracting
© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: On the occurrence of faults, balancing the grid is major requirement for large distribution power system. In many grid faults the working of Traditional Voltage Support scheme (VSS) is affected because of zero-sequence voltage. In this paper an advanced voltage support scheme is proposed to support voltage under various unbalancing conditions like under-voltage and over-voltage. This scheme, called Zero Sequence compensated voltage support scheme (ZCVS) is utilized in converter interface unit to precisely control the three phase voltages at the association point (PCC) inside security limits. This scheme compensates the zero sequence voltage and can be in resistive distribution system. Zero Sequence compensated voltage support scheme (ZCVS) combined with LAPO is also proposed which borders the active power oscillations in adjustable dc-link connected to converter to support the ac grid even under severe unbalances. The consequences of the proposed voltage support scheme and complimentary strategy are compared with traditional voltage support scheme.
Keywords: DC-Voltage Ripples, Oscillations Limitation, Power Oscillation, Voltage Regulation, Voltage Sags, Voltage Swells, Etc.
Scope of the Article: Grid Networking/ Computing