Improved Synchronverters with Bounded Frequency and Voltage for Smart Grid Integration

Zhong, Qing-Chang; Konstantopoulos, George C.; Ren, Beibei; Krstić, Miroslav

doi:10.1109/tsg.2016.2565663

Cited by 121 publications

(56 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By changing the inertia constant J and a different tunable constant D f , the desired response speed was achieved. In [84], a synchronverter with analytically determined bounds for frequency and voltage was introduced. In traditional synchronverters, saturation units were employed for this purpose, but such an approach can lead to instability due to wind-up.…”

Section: Second Generation Of Synchronvertersmentioning

confidence: 99%

Virtual Inertia: Current Trends and Future Directions

et al. 2017

View full text Add to dashboard Cite

Abstract:The modern power system is progressing from a synchronous machine-based system towards an inverter-dominated system, with large-scale penetration of renewable energy sources (RESs) like wind and photovoltaics. RES units today represent a major share of the generation, and the traditional approach of integrating them as grid following units can lead to frequency instability. Many researchers have pointed towards using inverters with virtual inertia control algorithms so that they appear as synchronous generators to the grid, maintaining and enhancing system stability. This paper presents a literature review of the current state-of-the-art of virtual inertia implementation techniques, and explores potential research directions and challenges. The major virtual inertia topologies are compared and classified. Through literature review and simulations of some selected topologies it has been shown that similar inertial response can be achieved by relating the parameters of these topologies through time constants and inertia constants, although the exact frequency dynamics may vary slightly. The suitability of a topology depends on system control architecture and desired level of detail in replication of the dynamics of synchronous generators. A discussion on the challenges and research directions points out several research needs, especially for systems level integration of virtual inertia systems.

show abstract

Section: Second Generation Of Synchronvertersmentioning

confidence: 99%

Virtual Inertia: Current Trends and Future Directions

et al. 2017

View full text Add to dashboard Cite

show abstract

“…However, to obtain a better performance that resists the intermittency of RESs, relatively large storage is preferable. An improved synchronverter that limits its voltage and frequency to within acceptable ranges is presented in [75].…”

Section: Challenges Of Implementing Dg Unitsmentioning

confidence: 99%

Evolution of Microgrids with Converter-Interfaced Generations: Challenges and Opportunities

Hossain¹,

Pota²,

Hossain³

et al. 2018

Preprint

View full text Add to dashboard Cite

Although microgrids facilitate the increased penetration of distributed generations (DGs) and improve the security of power supplies, they have some issues that need to be better understood and addressed before realising the full potential of microgrids. This paper presents a comprehensive list of challenges and opportunities supported by a literature review on the evolution of converter-based microgrids. The discussion in this paper presented with a view to establishing microgrids as distinct from the existing distribution systems. This is accomplished by, firstly, describing the challenges and benefits of using DG units in a distribution network and then those of microgrid ones. Also, the definitions, classifications and characteristics of microgrids are revised according to their specific roles to provide a sound basis for novice researchers to undertake ongoing research on microgrids.

show abstract

“…The stability analysis and control parameter tuning of the synchronverter are not easy due to its characteristics of more complicated nonlinearity. Global stability of the synchronverter was investigated in [22]. However, the stability analysis of the synchronverter in an unbalanced power grid, as well as the impact of the modified controller to the stability of the synchronverter, will be more complicated, and has not been examined yet.…”

Section: Introductionmentioning

confidence: 99%

A Modified Self-Synchronized Synchronverter in Unbalanced Power Grids with Balanced Currents and Restrained Power Ripples

et al. 2019

View full text Add to dashboard Cite

This paper proposes a modified self-synchronized synchronverter for unbalanced power grids. Small signal analysis of the conventional synchronverter shows that its stability margin around 50 Hz is very limited. Thus, power ripples will be caused at the frequency of 50 Hz. Filter- based current feeding loops are adopted in the conventional synchronverter in order to enhance its stability and eliminate power ripples. In addition, the characteristics of the conventional synchronverter in unbalanced power grids are analyzed, and an improved strategy using a resonant controller is proposed to restrain the current harmonics and power ripples. The parameter design is also studied for the proposed synchronverter. Experimental studies prove that the proposed strategy can achieve precise self-synchronization when the grid voltage is unbalanced, and the power-control performance is also improved significantly.

show abstract

Improved Synchronverters with Bounded Frequency and Voltage for Smart Grid Integration

Cited by 121 publications

References 38 publications

Virtual Inertia: Current Trends and Future Directions

Virtual Inertia: Current Trends and Future Directions

Evolution of Microgrids with Converter-Interfaced Generations: Challenges and Opportunities

A Modified Self-Synchronized Synchronverter in Unbalanced Power Grids with Balanced Currents and Restrained Power Ripples

Contact Info

Product

Resources

About