PV Penetration Limits in Low Voltage Networks and Voltage Variations

Aziz, T.; Ketjoy, Nipon

doi:10.1109/access.2017.2747086

Cited by 182 publications

(88 citation statements)

References 36 publications

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“…These results also illustrate that the penetration levels reach higher values especially when the TTL function is used in the optimization process. This, however, exceeds the recommended penetration levels and there is a need to specify an appropriate size of DGs as a constraint in the optimization process that is considered in the second scenario. …”

Section: Steady‐state Results and Discussionmentioning

confidence: 99%

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Assessment of optimal allocation of renewable distributed generator sources in distribution network

Nasef

Osheba

Khattab

et al. 2020

Engineering Reports

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The integration of distributed generators (DGs) into distribution networks in optimal allocation is one of the main issues facing power system engineers to ensure improved stability and economic operation. This article presents a detailed analysis of the impacts of the optimal allocation and the number of DGs on both system steady-state and transient performances of distribution networks. An oscillatory particle swarm optimization (OPSO) algorithm was used to find the optimal allocations of DGs via minimizing various objective functions that deal with Total Transmission Losses, Voltage Regulation, and Power Performance Index. The OPSO is used to optimize these functions as a single and as a multiobjective optimization problem. The effectiveness of the method is demonstrated with the IEEE-14 bus as an example of distribution networks with a 50% increase in system loading. Two penetration scenarios have been considered, the optimal sizes and locations of DGs are obtained, and the results are presented.In addition, the impact of the penetration level of Photovoltaic and Wind Energy sources on transient performance is obtained using detailed nonlinear models of both synchronous machines and DGs sources. The system response is then obtained when the system is subjected to a three-phase short circuit fault for six cycles and the results are presented in a comparative form for different penetration levels. The techniques and results presented in the article form a useful base for power system engineers in planning and operating distribution systems with high penetration levels of RDG sources. K E Y W O R D Sconcentrated and distributed DG (C-DG, D-DG), distributed generation (DG), optimal DG allocations, oscillatory PSO, penetration level.

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Section: Steady‐state Results and Discussionmentioning

confidence: 99%

“…It is not recommended to introduce more DGs within this region for economic reasons. In the light of these results, it was decided to set a 50% penetration level in the optimization process that is about twice the value recommended for medium voltage systems …”

Section: Steady‐state Results and Discussionmentioning

confidence: 99%

Assessment of optimal allocation of renewable distributed generator sources in distribution network

Nasef

Osheba

Khattab

et al. 2020

Engineering Reports

View full text Add to dashboard Cite

show abstract

“…A result of reverse power flow can be the noticeable rise in feeder voltage which adversely affects system stability and power quality. Additionally, power loss, protection issues, and cable ampacity violations [8], are presented as technical challenges for the PVDGs integration. Hence, the integration of significant volumes of these units requires planning and operational considerations to achieve maximized benefits while respecting network constraints.…”

Section: The Deployment Of Pvdgsmentioning

confidence: 99%

The Deployment of Low Carbon Technologies in Modern Distribution Networks

Mohamed

Morrow

Best

2019

2019 IEEE PES Innovative Smart Grid Technologies Europe (ISGT-Europe)

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Most modern distribution networks are experiencing an energy evolution to satisfy the need of sustainable, secure and clean sources of energy. New technologies are driving this transition, including photovoltaics, energy storage systems and electric vehicles. The integration and deployment of these technologies in the distribution network is having a positive impact on system efficiency. However, their behavior in the power system introduces technical challenges such as reverse power flow, voltage variation and other power quality issues. The integration of these technologies requires careful planning and operation to maintain or improve system stability and reliability. This work reviews the challenges imposed by deploying these low carbon technologies on low voltage systems. The main contributions of this study can be summarized as follows: Firstly, it generally reviews the solution methodologies and power management strategies applied in the distribution network in the presence of low carbon technologies. Secondly, it outlines some important facts and statistics about their deployment. Finally, it discusses the energy evolution of the Northern Ireland network highlighting challenges and solutions and providing recommendations for future research.

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“…The existing literature is mostly limited to the static safety index constraints, such as voltage deviation and network power flow, while research on the voltage fluctuation constraints is relatively rare. The literature [36,37] has pointed out that voltage waves should be considered when calculating DG accessible capacity dynamic impact, but there is still a lack of analysis for the impact of different power factors on the accessible capacity of PV power.…”

Section: Introductionmentioning

confidence: 99%

Solar PV Grid Power Flow Analysis

et al. 2019

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As the unconstrained integration of distributed photovoltaic (PV) power into a power grid will cause changes in the power flow of the distribution network, voltage deviation, voltage fluctuation, and so on, system operators focus on how to determine and improve the integration capacity of PV power rationally. By giving full consideration to the static security index constraints and voltage fluctuation, this paper proposes a maximum integration capacity optimization model of the PV power, according to different power factors for the PV power. Moreover, the proposed research analyzes the large-scale PV grid access capacity, PV access point, and multi-PV power plant output, by probability density distribution, sensitivity analysis, standard deviation analysis, and over-limit probability analysis. Furthermore, this paper establishes accessible capacity maximization problems from the Institute of Electrical and Electronics Engineers (IEEE) standard node system and power system analysis theory for PV power sources with constraints of voltage fluctuations. A MATLAB R2017B simulator is used for the performance analysis and evaluation of the proposed work. Through the simulation of the IEEE 33-node system, the integration capacity range of the PV power is analyzed, and the maximum integration capacity of the PV power at each node is calculated, providing a rational decision-making scheme for the planning of integrating the distributed PV power into a small-scale power grid. The results indicate that the fluctuations and limit violation probabilities of the power system voltage and load flow increase with the addition of the PV capacity. Moreover, the power loss and PV penetration level are influenced by grid-connected spots, and the impact of PV on the load flow is directional.

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PV Penetration Limits in Low Voltage Networks and Voltage Variations

Cited by 182 publications

References 36 publications

Assessment of optimal allocation of renewable distributed generator sources in distribution network

Assessment of optimal allocation of renewable distributed generator sources in distribution network

The Deployment of Low Carbon Technologies in Modern Distribution Networks

Solar PV Grid Power Flow Analysis

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