Stability implications of bulk power networks with large scale PVs

Kumar, Dhivya Sampath; Sharma, Anurag; Srinivasan, Dipti; Reindl, Thomas

doi:10.1016/j.energy.2019.115927

Cited by 31 publications

(20 citation statements)

References 15 publications

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“…The gain of this control induced a great mode shift and could be subject to optimization in terms of maximizing the damping. A slight improvement in damping was also confirmed in [71].…”

Section: Small-signal Stability Of Power Systems With Pv Generationmentioning

confidence: 54%

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A Comprehensive Review of Small-Signal Stability and Power Oscillation Damping through Photovoltaic Inverters

2021

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This paper focuses on the methods that ensure the rotor angle stability of electric power systems, which is most frequently analyzed with small-signal models. Over the past several decades, power system stabilizers (PSSs) for conventional excitation systems were the main tools for improving the small-signal stability of electromechanical oscillatory modes. In the last decade, power oscillation damping (POD) control implemented in photovoltaic (PV) inverters has been considered an alternative to PSSs. As PV generation undergoes massive rollout due to policy directions and renewable energy source integration activities, it could potentially be used as a source of damping, which is crucial for sustaining the rotor angle stability of the remaining in-service synchronous generators. Several studies have already been dedicated to the development of different damping strategies. This paper contributes to the existing research in power system stability by providing a comprehensive review of the effects of PV generation on small-signal stability, as well as the recent evolution of POD control through PV inverters. The features and impacts of the various ways to realize POD controllers are assessed and summarized in this paper. Currently, detailed information and discussions on the practical application of PV inverter PODs are not available. This paper is, thus, intended to initiate a relevant discussion and propose possible implementation approaches concerning the topic under study.

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“…The gain of this control induced a great mode shift and could be subject to optimization in terms of maximizing the damping. A slight improvement in damping was also confirmed in [71].…”

Section: Small-signal Stability Of Power Systems With Pv Generationmentioning

confidence: 54%

“…Another large-scale study was presented in [71]. The Texas 2000-bus system was tested for PV penetration levels up to 50%.…”

Section: Small-signal Stability Of Power Systems With Pv Generationmentioning

confidence: 99%

A Comprehensive Review of Small-Signal Stability and Power Oscillation Damping through Photovoltaic Inverters

2021

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“…Several studies have also been carried out on the effects of SPV integration on the voltage stability of a power system [ 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 ]. The impact of solar photovoltaic system on the dynamic voltage stability of a power system has been examined in [ 51 ].…”

Section: Review Of Facts Devices Applications For Voltage Stability Ementioning

confidence: 99%

Application and control of flexible alternating current transmission system devices for voltage stability enhancement of renewable-integrated power grid: A comprehensive review

Adetokun

Muriithi

2021

Heliyon

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This paper presents a comprehensive review on the application and control of Flexible Alternating Current Transmission Systems (FACTS) devices in order to improve voltage stability of power grid with high share of renewable energy systems. The rise in the development of renewable energy technologies is driven by the attempts to mitigate the effects of global warming. In addition, global energy demand continues to rise as new electricity-driven systems such as electric vehicles are being developed and as remote locations are being connected to the grid. These changes in the power grid formation comes with attendant challenges which must be addressed. One of these challenges is voltage stability issues. This paper therefore explores the applications of FACTS devices for voltage stability improvement and points out the future research direction in the area of voltage stability enhancement by FACTS devices for modern power grids characterized by increasing levels of renewable energy penetration.

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“…where P PV , P ESS and P g,PV are the power outputs of the PV module, ESS and the overall output to the grid. It is to be noted that for a time scale t l , the overall system RR has to be within the regulation limit of the grid as given in Equation ( 5), Subsequently, the RR determines the ESS input to the grid, such that the RR does not compromise grid stability, as shown in Equations (5)(6)(7)(8)(9)(10).…”

Section: Ess Modelmentioning

confidence: 99%

Improvement of transient response in grid‐tied photovoltaic systems using virtual inertia

et al. 2020

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Photovoltaic (PV) generation systems, unlike conventional generators, do not possess any inherent inertia. The problem is further amplified by the fact that they are non‐dispatchable and highly intermittent by nature. Furthermore, the rate at which PV power output changes is of a much shorter timescale than that of conventional generators. Thus, integrating them in large quantities to the power grid without appropriate measures will compromise the power grid stability. One of the feasible solutions is to implement the concept of virtual inertia to PV systems, by adding energy storage systems (ESS) such as batteries in parallel with PV systems. In this paper, the ESS will be controlled to regulate the ramp rate (RR) of the PV power output to the grid, which smoothens the overall generation power profile. By modelling the grid, PV, ESS and load individually in the s‐domain and using an equivalent overall two‐machine, two‐area model, the impact of implementing virtual inertia is demonstrated. The results highlight the effectiveness in using ESS to control the RR and improving the transient responses of the overall grid system. Moreover, the economic impact and feasibility of ESS are also analysed using a residential PV and load profile from Singapore.

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Stability implications of bulk power networks with large scale PVs

Cited by 31 publications

References 15 publications

A Comprehensive Review of Small-Signal Stability and Power Oscillation Damping through Photovoltaic Inverters

A Comprehensive Review of Small-Signal Stability and Power Oscillation Damping through Photovoltaic Inverters

Application and control of flexible alternating current transmission system devices for voltage stability enhancement of renewable-integrated power grid: A comprehensive review

Improvement of transient response in grid‐tied photovoltaic systems using virtual inertia

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