Impacts of integration of very large‐scale photovoltaic power plants on rotor angle and frequency stability of power system

Rezaei, Javad; Golshan, Mohamad Esmail Hamedani; Alhelou, Hassan Haes

doi:10.1049/rpg2.12529

Cited by 9 publications

(3 citation statements)

References 27 publications

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“…Using such models and actual power grid data, the influence is analyzed through eigenvalues, voltage stability and transient stability. Rezaei J and his research team in (Rezaei et al, 2022) investigated the influence of exceptionally large solar energy generation on the dynamic characteristics of power grids, including rotation speed and reliability requirements. Therefore, a detailed equivalent dynamic model and corresponding controller are established.…”

Section: Introductionmentioning

confidence: 99%

Frequency stability analysis of power system with photovoltaic frequency regulation considering communication delay

Yang¹,

Hu²,

Yang³

et al. 2023

Front. Energy Res.

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Photovoltaic (PV) grid-connected will reduce the inertia of the system, which has an effect on power system frequency reliability. In order to clarify the frequency stability situation of power system when photovoltaic participates in frequency regulation, this paper first establishes the load frequency control (LFC) model of the power system with photovoltaic based on the analysis of the traditional LFC model of the power system. Secondly, based on the Pade approximation method, the communication delay in the control loop is linearized. The frequency stability of power system with photovoltaic participation in frequency regulation is characterized by system frequency steady-state error, feedback system sensitivity, and closed-loop system stability margin. According to the index calculation and theoretical derivation, the influence of system frequency regulation related parameters on frequency characteristics is analyzed. Finally, on the matlab/simulink simulation environment, the frequency stability methodological approach presented in this research is validated. The results of the simulations demonstrate the effectiveness of this analytical approach in assessing the frequency stability of a power system with photovoltaic frequency regulation while taking communication latency into account. It can provide guidance for the power grid’s secure operation and control when photovoltaics participate in frequency regulation.

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Section: Introductionmentioning

confidence: 99%

Frequency stability analysis of power system with photovoltaic frequency regulation considering communication delay

Yang¹,

Hu²,

Yang³

et al. 2023

Front. Energy Res.

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show abstract

“…As demonstrated, the benefits of PV integration are strongly related to the factors such as the node criticality, type, location and penetration of PVs, as well as types of transients. The impacts on the transient stability are analyzed in the 39-bus and 118-bus systems, under different grounding fault locations and various reactive power control strategies (Rezaei et al, 2022). It is found that they depend on the disturbance types, PV installation locations, and network structure.…”

mentioning

confidence: 99%

Transient synchronization stability of photovoltaics integration by singular perturbation analysis

Wu,

Han,

Zhan

2024

Front. Energy Res.

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The integration of large-scale photovoltaics (PVs) into the power grid has significantly altered the transient synchronization dynamics of traditional power systems dominated by synchronous generators (SGs) and posed great challenges to modeling and analysis of PVs integration. In this paper, the transient synchronization stability of the PV-SG system is studied using the singular perturbation technique. Firstly, a nonlinear model of a PV-SG system is established to reveal the multiscale transient synchronization characteristics. Further, the full system is decomposed into a slow subsystem and a fast subsystem by the singular perturbation technique. The fast subsystem containing the dynamics of the DC voltage control, terminal voltage control, and phase-locked loop, and the slow subsystem containing the dynamics of rotor motion can perfectly reflect the dynamics of the full system within the electromagnetic and electromechanical timescales, respectively. The proposed model provides a clearer physical picture of dynamics in the PV-SG system within the electromagnetic and electromechanical timescales. Subsequently, the stability of the slow and fast subsystems is investigated using the energy function and eigenvalue analysis methods, respectively. Meanwhile, the impacts of various operating, control, and structural parameters on the transient synchronization stability are uncovered. Different from the most existing research endeavors on the wide simulations of the PVs integration, the impact of PVs on the synchronization dynamics of SGs without considering the dynamical characteristics of the PV system, and the transient synchronization stability analyses of the PLL-based voltage source converter systems, it is the key contribution to study the transient synchronization dynamical characteristics of the PV system and its interaction with the SG under different timescales. All these are helpful and easy to extend to more complicated PV-SG systems. Finally, the analysis results are validated by extensive simulations.

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“…Вeликомaсштaбні фотоeлeктричні устaновки (VLS-PV) цінують зa високу eфeктивність, коли їхня aрхітeктурa є оновлювaною тa нaдійною. Крім того, витрaти нa пeрeтворeння eнeргії є низькими, a устaновкa VLS-PV здaтнa пом'якшити нaслідки чaсткового зaтінeння [3,4].…”

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Topology of the Energy Harvesting System for Large-Scale Solar Power Plants Using a Two-Stage Differential Power Converter

Nerubatskyi,

Plakhtii,

Hordiienko

2024

ЗНПУкрДУЗТ

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The capacity of photovoltaic installations continues to grow and reaches hundreds of megawatts. Large-scale PV systems are valued for their high efficiency when their architecture is renewable and reliable. In addition, energy conversion costs are low and the installation is able to mitigate the effects of partial shading. Plants with distributed power electronics converters have demonstrated higher energy output, better reliability, significantly reduced design costs, and greater flexibility in PV plant designs. The article analyzes energy harvesting architectures for large-scale solar power plants. Advantages and disadvantages of using a boost converter in these architectures are considered. The topology of a two-stage differential power converter with DC collection network characteristics is presented, which provides higher energy output for large-scale solar power plants. The principle of operation of the converter and the flow of current in the circuit during switching are presented. The approach is to divide the solar panels into several zones using a central grounding point with a DC collection network and connecting them using a fractional-rated current-voltage balancing converter topology to achieve maximum power point tracking, thus mitigating the effects of partial shading and temperature drop. The proposed topology is characterized by fractional power, higher efficiency, scalability and lower cost. The operation of current balancing and voltage equalization cascades, which process partial power and allow groups of photovoltaic panels to work at maximum power under the influence of environmental conditions, has been calculated. It is shown that the proposed system can be scaled for large-scale solar power plants, while creating homogeneous and heterogeneous photovoltaic installations using photovoltaic panels from different manufacturers.

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Impacts of integration of very large‐scale photovoltaic power plants on rotor angle and frequency stability of power system

Cited by 9 publications

References 27 publications

Frequency stability analysis of power system with photovoltaic frequency regulation considering communication delay

Frequency stability analysis of power system with photovoltaic frequency regulation considering communication delay

Transient synchronization stability of photovoltaics integration by singular perturbation analysis

Topology of the Energy Harvesting System for Large-Scale Solar Power Plants Using a Two-Stage Differential Power Converter

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