Impact of High PV Penetration on Voltage Profiles in Residential Neighborhoods

Tonkoski, Reinaldo; Turcotte, Dave; EL-Fouly, Tarek H. M.

doi:10.1109/tste.2012.2191425

Cited by 465 publications

(232 citation statements)

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“…Renewable energy curtailment and reverse power flow can also occur in a low-voltage ADN (LV-ADN) with a high renewable penetration from distributed generation (DG) units such as photovoltaic (PV) systems [17][18][19]. It was demonstrated in [19] that utilizing the reactive power capability of PV systems in a LV-ADN can lead to a huge amount of reactive energy import from an Figure 1.…”

Section: Figurementioning

confidence: 99%

On Variable Reverse Power Flow-Part I: Active-Reactive Optimal Power Flow with Reactive Power of Wind Stations

Gabash

2016

Energies

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It has recently been shown that using battery storage systems (BSSs) to provide reactive power provision in a medium-voltage (MV) active distribution network (ADN) with embedded wind stations (WSs) can lead to a huge amount of reverse power to an upstream transmission network (TN). However, unity power factors (PFs) of WSs were assumed in those studies to analyze the potential of BSSs. Therefore, in this paper (Part-I), we aim to further explore the pure reactive power potential of WSs (i.e.

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Section: Figurementioning

confidence: 99%

On Variable Reverse Power Flow-Part I: Active-Reactive Optimal Power Flow with Reactive Power of Wind Stations

Gabash

2016

Energies

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“…Among them, the most common problem is the over-voltage issues caused by reverse power flow [5,6]. The bi-directional power flow caused by DGs has made voltage regulation more challenging when using traditional methods such as on load tap changers (OLTC).…”

Section: Introductionmentioning

confidence: 99%

Distributed control scheme for residential battery energy storage units coupled with PV systems

2017

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A distributed control method for residential battery energy storage (BES) units coupled with photovoltaic (PV) systems is presented. The objective is to utilize customer owned BES units for solving the over-voltage issues caused by high PV penetration without significantly affecting the BES owners local objectives. 24 hour ahead active power set points of the BES unit are calculated by an optimization based scheduling algorithm. The objective function is locally decided and the optimization is performed at the local level.The BES units are charged from the excess energy from the PV systems mostly during the period the grid is under risk of over-voltage. If the set points that were calculated by the optimization, turn out not to be able to maintain the voltages within the statutory limits in real time operation, the active power set points are modified. Reactive power is also utilized when active power is not sufficient. The new set points are calculated by a central controller. The performance of the proposed method is validated in a simulation study. It is shown that the residential BES units can successfully be utilized for solving over-voltage issues without significantly affecting the primary needs of the BES owners. Keywords

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“…The integration of a large number of PV generators in an existing grid causes a significant rise in the local voltage levels due to reverse power flow, which can be seen as a major technical issue. Most importantly, in the case of high PV generation and low load conditions the power injection from PV has a severe impact at the end of the feeder as well as on the neighbourhoods as presented in [17]. In addition, various types of PV inverters until now are typically designed to produce only real power and do not regulate the voltages at the integration point.…”

Section: Growth Of Solar Pv Technology and Its Statisticsmentioning

confidence: 99%

High penetration of PV systems in low voltage distribution networks: investigation of power quality challenges and mitigation

Chidurala¹

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World electricity demand is continuously increasing and fossil fuel supplies are not sustainable. Solar Photovoltaic (PV) energy is one of the emerging resources around the world, which produces emission free electricity. Nowadays, the advancements in rooftop solar PV technology, government subsidies, decreasing capital cost and feed-in-tariffs have promoted installation in residential and commercial applications. The exponential uptake in widespread integration of PV systems in existing low voltage (LV) distribution networks is raising additional new challenges in terms of power quality, stability and protection. In LV distribution networks, poor power quality (PQ) is the most serious concern.Characteristically, LV distribution networks are not designed for significant back-feed of power generation to the main grid. Also, these networks are unbalanced in nature due to asymmetry in system impedances and single-phase loads. This together with a large number of small-scale PV system integrations in LV networks can cause poor PQ challenges in terms of voltage quality and harmonics. PV systems can themselves generate harmonics, due to the usage of power electronic inverters. In addition, the augmentation of power electronics based Furthermore, this research has suggested a novel solution to overcome the above PQ issues.The concept of adopting the PV inverter as a virtual DSTATCOM named as Solar-DSTATCOM has been proposed. Also, a new control strategy for the PV inverter has been developed to provide independent phase voltage regulation and load reactive power and harmonic compensation, which could eliminate issues in the unbalanced distribution network.Initially, the Solar-DSTATCOM controller has been verified in a PSCAD simulation environment. Further, different case studies have been performed on the IEEE-13 bus network for PQ issues compensation. In addition, the proposed Solar-DSTATCOM control system has been tested and verified in controller hardware-in-the-loop simulation environment, which combines the real-time digital simulator and dSPACE DS1103 hardware board. Detailed investigations are carried out for various different case studies, which include daytime, nighttime operations, the impact of dynamic load profiles and finally harmonic analysis. The analysis has revealed that Solar-DSTATCOM exceptional performance in the hardware environment has enhanced the grid PQ by providing voltage regulation, reactive power compensation and power factor correction. The harmonic emissions are well within the limits.iii Declaration by authorThis thesis is composed of my original work, and contains no material previously published or written by another person except where due reference has been made in the text. I have clearly stated the contribution by others to jointly-authored works that I have included in my thesis.

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Impact of High PV Penetration on Voltage Profiles in Residential Neighborhoods

Cited by 465 publications

References 6 publications

On Variable Reverse Power Flow-Part I: Active-Reactive Optimal Power Flow with Reactive Power of Wind Stations

On Variable Reverse Power Flow-Part I: Active-Reactive Optimal Power Flow with Reactive Power of Wind Stations

Distributed control scheme for residential battery energy storage units coupled with PV systems

High penetration of PV systems in low voltage distribution networks: investigation of power quality challenges and mitigation

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