Robust Virtual Inertia Control of a Low Inertia Microgrid Considering Frequency Measurement Effects
Open Access
- 26 April 2019
- journal article
- research article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Access
- Vol. 7, 57550-57560
- https://doi.org/10.1109/access.2019.2913042
Abstract
Virtual inertia emulation could be regarded as an inevitable component of microgrids with renewable energy, enhancing microgrid inertia and damping properties. In applying this control technique, a phase-locked loop (PLL) is necessary to obtain the estimation of the system frequency data. However, the employment of PLL could cause larger frequency oscillation to the microgrid due to its dynamics. This issue would be exacerbated in a low inertia microgrid driven by high renewable penetration, severely deteriorating frequency stability. Thus, the effect of PLL with measurement delay is a critical issue in utilizing virtual inertia control. To overcome such problem, this work proposes a robust virtual inertia control for a low inertia microgrid to minimize undesirable frequency measurement effects, improving microgrid frequency stability. The robust ∞ control design using a linear fractional transformation (LFT) technique is used to develop the virtual inertia control loop, considering the dynamics of PLL with measurement delay and the uncertainties of system inertia and damping. The efficacy of the proposed H∞ control method is compared to conventional and optimum proportional-integral (PI)-based inertia control. The results show that the ∞-based robust virtual inertia control is superior to both conventional virtual inertia control and optimum PI-based virtual inertia control against a wide range of microgrid operating conditions, disturbances, and parametric uncertainties.Keywords
Funding Information
- Kyushu Institute of Technology
This publication has 16 references indexed in Scilit:
- Inertia response and frequency control techniques for renewable energy sources: A reviewRenewable and Sustainable Energy Reviews, 2017
- Inertia Emulation in AC/DC Interconnected Power Systems Using Derivative Technique Considering Frequency Measurement EffectsIEEE Transactions on Power Systems, 2016
- Virtual Synchronous Power Strategy for Multiple HVDC Interconnections of Multi-Area AGC Power SystemsIEEE Transactions on Power Systems, 2016
- Analysis of derivative control based virtual inertia in multi‐area high‐voltage direct current interconnected power systemsIET Generation, Transmission & Distribution, 2016
- A Virtual Synchronous Machine implementation for distributed control of power converters in SmartGridsElectric Power Systems Research, 2015
- Trends in Microgrid ControlIEEE Transactions on Smart Grid, 2014
- Virtual synchronous generators: A survey and new perspectivesInternational Journal of Electrical Power & Energy Systems, 2014
- Synchronverters: Inverters That Mimic Synchronous GeneratorsIEEE Transactions on Industrial Electronics, 2010
- Virtual synchronous generatorsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2008
- Virtual synchronous machinePublished by Institute of Electrical and Electronics Engineers (IEEE) ,2007