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Stability Analysis of Phase Locked Loop Controllers for Grid Tied Inverters in Weak Microgrids

Narayanan, Nakul K and Shan, S and Umanand, L (2018) Stability Analysis of Phase Locked Loop Controllers for Grid Tied Inverters in Weak Microgrids. In: 2018 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), 18-21 Dec. 2018, Chennai.

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Official URL: https://doi.org/10.1109/PEDES.2018.8707650

Abstract

This paper analyses, the effect of the phase locked loop (PLL) controller in the stability of the voltage source converter(VSC) in a microgrid or when connected to a weak AC grid. While designing the controller for PLL, it may not be possible to consider the effect of the load and line impedance as they are not readily known. In a microgrid or in a weak grid, the dynamics of the PLL are affected due to the high impedance nature of the network. A small signal model is built to show how the PLL controller affects the stability of the VSC. A comparison is made between proportional (P) and proportional integral (PI) controller, using detailed time domain simulation in PSCAD/EMTDC to demonstrate this problem.

Item Type: Conference Proceedings
Additional Information: The copyright for this article belongs IEEE
Keywords: PLL; weak grid; microgrid; stability
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Division of Electrical Sciences > Electrical Communication Engineering > Electrical Communication Engineering - Technical Reports
Depositing User: Id for Latest eprints
Date Deposited: 20 Jun 2019 16:53
Last Modified: 21 Jun 2019 18:57
URI: http://eprints.iisc.ac.in/id/eprint/62990

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