Impact of increased penetration of photovoltaic generation on power systems (original) (raw)
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Impact of large-scale PV penetration on power system oscillatory stability
IEEE PES General Meeting, PES 2010, 2010
This paper presents the impact of large-scale photovoltaic (PV) generation on power system oscillatory instability. Two models of PV generation systems, namely detailed dynamic and simplified models, have been studied in IEEE-14 bus test system typically used for power system oscillatory instability studies. Influence of radiation pattern, and size and location of PV generating system on the power system stability issue is thoroughly investigated. In PV generation penetration, two scenarios, namely concentrated and scattered are examined. Simulation shows that the increased penetration of PV system enhances power system oscillatory stability.
Impact of the solar photovoltaic (PV) generation on long-term voltage stability of a power network
2017 IEEE Innovative Smart Grid Technologies - Asia (ISGT-Asia)
Power system voltage stability is of paramount importance to maintain a secure and reliable power network with high penetration of renewables. This paper investigates the impact of the solar photovoltaic (PV) generation on long-term voltage stability of a power network. Long-term voltage stability is investigated using the Nordic-32 bus test network comprised of dynamic models of automatic voltage regulators (AVRs), overexcitation limiters (OELs) and on-load tap changing (OLTC) transformers combined with static and dynamic loads. The investigation is conducted using an aggregated solar-PV system operating at voltage control mode under various loading conditions. A systematic approach has been followed for solar-PV integration. The results show that solar-PV systems enhance the long-term voltage stability of a stressed transmission grid when they operate under low loading conditions due to the improved reactive power support provided by solar-PV systems.
A Fundamental Study on the Transient Stability of Power Systems with High Shares of Solar PV Plants
Electricity
The last decade has seen an immense growth in renewable energy sources such as solar photovoltaic (PV) plants due to environmental concerns. Due to this rapid growth, solar PV plants are starting to have a larger influence on power system stability and thus their dynamic behavior cannot be ignored in stability studies. The lack of well-established models and parameter sets is the primary reason solar PV plants are not modeled with dynamic characteristics. This paper presents a method to define a standard parameter set for representing large-scale and aggregated solar PV plants in stability studies from the perspective of the transmission system operator (TSO). The method takes into account primarily the conditions provided in the grid connection requirements; for illustrative purposes, the connection requirements of the Netherlands are used. Additionally, a relationship defined as short-circuit current (SCC) PV ratio is proposed to estimate the effect of solar PV plants on transient...
Transient analysis and simulation of a grid-integrated large-scale photovoltaic (PV) energy system
QScience Connect
Photovoltaic (PV) power generation is the fastest growing technology in the distributed generation sector. In addition to integrating renewable energies, current grid is required to be reliable, stable, and of high-quality power. The large-scale integration of PV power into the grid is bound up with problems of the safe operation of the grid, bringing new challenges to the GCC (Gulf Cooperation Council) system. The objective of this paper was to study and analyze the integration of large-scale PV facilities into the GCC power grid and to address their energy security and environmental challenges. A new simulation model was developed to analyze and investigate the impact of integrating large-scale solar PV facilities into the distribution power grid and to carry out transient stability analysis.
2017
This paper presents a transient stability investigation with solar-PV generation. In this study solar-PV generation is represented by an aggregated solar-PV model, which is an efficient analytical startegy to investigate transient stability of a power system. The study was conducted using the IEEE 3-machine 9-bus test system in DIgSILENT Power Factory. In this study, two solar-photovoltaic (PV) integration scenarios are considered. First, traditional synchronous generators (SGs) are connected to the grid and then the critical clearing time (CCT) are determined after creating faults at various locations in the network. Second, the traditional SGs are replaced by the aggregated solar-PV system with similar capacity, and then CCT is calculated in order to accurately investigate and quantify the impact of the solar-PV generation. From the simulation studies, it has been found that integration of the solar-PV into the power system have a beneficial impact on transient stability, especial...
Influence of Large-scale PV on Voltage Stability of Sub-transmission System
International Journal on Electrical Engineering and Informatics, 2012
Voltage instability is considered as one of the main threats to secure operation of power systems around the world. Grid connected renewable energy-based generation are deploying in recent years for many economic and environmental reasons. This type of generation could have significant impact on power system voltage stability given the nature of the primary source for generation and the technology used for energy conversion. This paper presents the results of an investigation of static voltage stability in heavily stressed IEEE-14 bus test system with large-scale PV integration. The study focused on the impact of large-scale PV penetrations and dynamic VAr placements on voltage stability of the sub-transmission system. For this study, the test system loads are modeled as the summer peak load of a realistic system. The comparison of STATCOM and SVC performance with large-scale PV is also discussed.
Impact of large scale photovoltaic generation on voltage stability in distribution networks
European Journal of Electrical Engineering
This paper investigates the impact of integrating large scale photovoltaic power on voltage stability in radial distribution networks. Detailed modeling of the photovoltaic systems is presented. The study is based on bifurcation diagrams of photovoltaic generation, load flow analysis, short circuits, photovoltaic farm disconnections and loading conditions. Maximum penetration levels of solar photovoltaic generation are examined using bifurcation diagrams. The study considers is a utility 53 buses radial distribution network. Several aspects are presented and discussed. RÉSUMÉ. L'évolution des réseaux électriques est marquée par des variations continues de leur topologie. En particulier l'intégration des sources renouvelables de plus en plus importantes a soumis ces réseaux à de nouvelles contraintes d'exploitation. A titre d'exemple, les systèmes photovoltaïques (PV) posent de nouveaux problèmes de stabilité aussi bien statique que dynamique, qui ne cessent d'évoluer avec l'accroissement des puissances installées. En effet, l'intégration de ces fermes photovoltaïques influe sur les caractéristiques électriques de fonctionnement du réseau en régime statique, et présente aussi un impact sur son comportement dynamique. Cet article porte sur l'impact d'une intégration massive de l'énergie photovoltaïque sur la stabilité statique et dynamique du réseau de distribution tunisien. Pour cela nous avons mené une étude statique basée sur les diagrammes de bifurcation de tension. Ensuite nous avons entamé le régime transitoire dans un tel système en cas de base et en cas de pénétration photovoltaïque maximale.
2016
More PV systems have been connected to the electrical network each year. As the number of PV systems increases, some issues affecting grid operations have been identified. This paper studied the impacts related to changes in solar irradiance on a distribution/sub-transmission network, considering variations due to moving clouds and daily cycles. Using MATLAB/Simulink software, a solar farm of 30 MWp was built and then implemented to a test network. From simulations, it has been determined that irradiance changes can have a significant impact on the grid by causing voltage fluctuations outside the allowable thresholds. This work discussed some local control strategies and grid reinforcements to mitigate the negative effects of the irradiance changes on the grid. Keywords—Utility-scale PV systems, reactive power control, solar irradiance, voltage fluctuation.
IMPACT ANALYSIS OF PV INTEGRATION ON POWER SYSTEM STABILITY UNDER CONTINGENCIES: CASE STUDY
MM SCIENCE JOURNAL, 2023
Today, greenhouse gas emissions and climate change stemming from the usage of fossil fuels are significant worldwide issues. Renewable energy, such as solar energy, is an environmentally friendly and non-polluting option. However, there are numerous worries regarding the possible influence of renewable energy integration on power system stability. Therefore, research is required to investigate and assess this effect. This study analyzes and investigates the impact of photovoltaic (PV) power plants installed in the kaberten region (Southwest of Algeria) on the power system's transient stability. The obtained results proved that the photovoltaic power plant positively affects the system's stability. In addition, it provides clean energy and reduces reliance on traditional sources.
Transient response of a megawatt-scale solar photovoltaic in an electric distribution utility
International Journal of Electrical and Computer Engineering (IJECE), 2024
There is an increasing trend among customers of an electrical distribution utility to adopt grid-tied solar photovoltaic systems. This shift offers multiple benefits to consumers, including lower monthly electricity bills and a contribution to the development of green energy. For the electrical distribution utility, various impacts may arise due to varying levels of solar energy penetration. This study investigates the effects of integrating varying levels of solar photovoltaic penetration into the commercial consumer network of Cagayan de Oro Electric Power and Light Company (CEPALCO) in the Philippines. Utilizing PowerWorld simulator, the research evaluates 11 different scenarios with solar penetration levels adjusted according to the percentage of load demand. Key findings include alterations in solar megavolt ampere of reactive power output, bus voltage levels, transformer power loading, and transmission line ampacity, with frequency levels remaining stable across scenarios. The optimal solar penetration level was identified at 70%, balancing the benefits of solar energy integration with the need to maintain grid stability and operational limits. This optimal level ensures the effective utilization of renewable energy sources without compromising the performance of CEPALCO's electrical infrastructure. The research concludes with recommendations for maintaining grid stability and operational limits at the optimal solar penetration limits.