Experimental study on short-circuit current characteristics of a photovoltaic system with low voltage ride through capability under a symmetrical fault

Yuan, Shuai; Yang, Baofeng; Zhang, Jianying

doi:10.1016/j.egyr.2022.03.089

Cited by 11 publications

(10 citation statements)

References 16 publications

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“…Actually, the switching frequency of a PV inverter is usually about from 2 to 10 kHz, and the duration of each switching state is about 0.1 ms. Generally, the duration of a short-circuit current transient process is about 30 to 50 ms [7,21]; therefore, the duration time scale of a switching state is much smaller than that of a short-circuit current transient process which we are interested in. In view of this, we can use an averaging method to simplify a detailed switching model, which means that we can only focus on the DC component and fundamental component of a switching function, ignoring the high-frequency components.…”

Section: Proposed Model Of a Three-level Pv Invertermentioning

confidence: 99%

“…PV system short-circuit experiments with different voltage dips at high and low active power levels before a fault are designed and conducted [7]. The study in [7] provides experimental results of steady-state values, peak values and ingredients, but it has not shown any model or reasons that can explain these characteristics. PV system models for grid short-circuit currents calculation are proposed and studied [8][9][10][11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

“…To understand characteristics of a PV short‐circuit current, a series of studies are conducted. PV system short‐circuit experiments with different voltage dips at high and low active power levels before a fault are designed and conducted [7]. The study in [7] provides experimental results of steady‐state values, peak values and ingredients, but it has not shown any model or reasons that can explain these characteristics.…”

Section: Introductionmentioning

confidence: 99%

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A state‐space average model of a three‐level PV inverter for transient short‐circuit currents analysis

Yuan,

Wen,

Zhang

et al. 2024

IET Generation Trans & Dist

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This paper presents a state‐space average model of a three‐level photovoltaic (PV) inverter to understand short‐circuit currents transient characteristics. Analytical solution of the model is also derived. The proposed model is validated with PV system controller hardware in‐loop (HIL) test method. The errors between simulation and HIL tests results under various conditions are evaluated, testifying the validity of the proposed model. With the model and analytical solution, the decaying time constants of sub‐transient and transient processes are derived, which shows that the time constants of a three‐level PV inverter are not fixed and they vary with voltage dips. The analytical expression of short‐circuit currents is also formulated. The findings from this study are essential to short‐circuit current calculations of a power grid with large‐scale PV plants, coordination of power system protections, and grid planning.

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Section: Proposed Model Of a Three-level Pv Invertermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A state‐space average model of a three‐level PV inverter for transient short‐circuit currents analysis

Yuan,

Wen,

Zhang

et al. 2024

IET Generation Trans & Dist

Self Cite

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“…frame stratification [17], -increase in resistance and short circuit in cells [18], -shading of panels [19], -junction box failure [20], -PV panels aging [21], -a fire in the installation caused by a short circuit [22], -degradation of cables insulation [23], -improper operational conditions [24], -no lightning protection or overvoltage [25],…”

Section: Operation and Failures Of Photovoltaic Installationsmentioning

confidence: 99%

Most Searched Topics in the Scientific Literature on Failures in Photovoltaic Installations

Kut

Pietrucha-Urbanik

2022

Energies

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Photovoltaic installations (PVs) are currently one of the fastest-growing sources of renewable energy. Expanded forms of financial support and higher electricity prices have resulted in a large increase in its installed capacity. PV installations are increasingly being ordered by industry and privates, often for installations capacity of several hundred kilowatts. In addition to the advantages, photovoltaic installations also have drawbacks. One of these is that the increase in the voltage in the power grid leads to the exclusion of individual installations from the grid. An important issue in the operation of photovoltaic installations is also their reliability during their lifetime. The reliability of photovoltaic installations depends on the random nature of the cloud cover as well as the material’s mechanical degradations. This paper presents a literature analysis using Citespace software in terms of reliability. A detailed bibliometric analysis has been performed to outline the main drawbacks of the PV installations cited by researchers. This literature review forms the basis for further analysis. The paper also presents a new approach to implementing the Multiple-Criteria Decision Analysis (MCDA) method for assessing the risk of failure of PV panels. The obtained results showed the main interests of scientists in the field of failure analysis of photovoltaic installations and countries having the largest share in research on this issue. The applied Analytic Hierarchy Process (AHP) analysis enables supporting the process of managing photovoltaic installations by analyzing installation operations in terms of reliability as reliability impacts the profitability of investments and operating costs. The proposed method can be used by the operators of photovoltaic installations or farms.

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“…This is also driven by the grid codes which have recently started to define the Fault-Ride-Though (FRT) requirement. FRT requires that RESs must remain connected during fault events and provide dynamic voltage support by injecting reactive currents during faults [10], [11], [12], [13]. Hence, the SC contribution from RESs shows distinct characteristics due to the limitation in their current-carrying capability, the different control strategies, and the various FRT requirements.…”

Section: Introductionmentioning

confidence: 99%

Application of Artificial Neural Network-Based Tool for Short Circuit Currents Estimation in Power Systems With High Penetration of Power Electronics-Based Renewables

et al. 2023

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The increasing integration of Power Electronics (PE)-based renewable energy sources into the electric power system has significantly affected the traditional levels and characteristics of fault currents compared to the ones observed in power systems dominated by synchronous generating units. The secure operation of a renewable rich power system requires the proper estimation of fault currents with wide range of scenarios of the high share of renewables. Although the utilization of detailed and complex time-domain dynamic simulations allows for calculating the fault currents, the resulting modeling complexity and computational burden might not be adequate from the operational perspective. Thus, it is necessary to develop alternative quicker data-driven fault current estimation approaches to support the system operator. For this purpose, this paper utilizes an Artificial Neural Network (ANN)-based tool to estimate the characteristics of short circuit currents in power systems with high penetration of power electronics-based renewables. The short circuits against different penetration of renewables are produced offline using the DIgSILENT PowerFactory considering the control requirements for renewables (e.g., fault ride through requirement). The resulting dataset is utilized to train the ANN to provide the mapping between the penetration level and the characteristics of the short circuit currents. The application of the approach using the modified IEEE 9-bus test system demonstrates its effectiveness to estimate the components of short circuit currents (subtransient current, transient current, and peak current) with high accuracy based only on the penetration of power electronics-based renewables.INDEX TERMS Artificial neural networks, future power systems, photovoltaic systems, power electronics, short circuit currents.

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Experimental study on short-circuit current characteristics of a photovoltaic system with low voltage ride through capability under a symmetrical fault

Cited by 11 publications

References 16 publications

A state‐space average model of a three‐level PV inverter for transient short‐circuit currents analysis

A state‐space average model of a three‐level PV inverter for transient short‐circuit currents analysis

Most Searched Topics in the Scientific Literature on Failures in Photovoltaic Installations

Application of Artificial Neural Network-Based Tool for Short Circuit Currents Estimation in Power Systems With High Penetration of Power Electronics-Based Renewables

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