Performance Comparison of Active and Passive LVRT strategies for Grid Connected PV Systems

RajaMohamed, S.; Jeyanthy, P. Aruna; Devaraj, D.; Bouzguenda, Mounir

doi:10.1109/incos45849.2019.8951327

Cited by 6 publications

(5 citation statements)

References 10 publications

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“…Since the reactive power is regulated based on the voltage drop, the stator reactive current reference can be obtained as: By substituting ( 8) into (7), the rotor reactive current can be derived as:…”

Section: Fault Current Characteristics Of the Dfigmentioning

confidence: 99%

“…To ensure safe and stable operation of the modern distribution network and prevent chain losses of DGs under fault conditions, several requirements have been formulated requiring DGs to have low-voltage ride through (LVRT) capability [5,6]. During the LVRT process, DG fault current characteristics are significantly different to those of conventional synchronous generators [7]. This makes it difficult to calculate the fault components and satisfy relay protection requirements [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Equivalent model of multi-type distributed generators under faults with fast-iterative calculation method based on improved PSO algorithm

Wang

Song

Liang

et al. 2021

Prot Control Mod Power Syst

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There are various types of distributed generators (DGs) with different grid integration strategies. The transient characteristics of the fault currents provided by the DGs are different to those of conventional synchronous generators. In this paper, a distribution network with multi-type DGs is investigated, including consideration of DG low-voltage ride through (LVRT). The fault current characteristics of two typical DGs, i.e. an inverter-interfaced distributed generator (IIDG) and a doubly-fed induction generator (DFIG), are analyzed, considering the specific operation modes. Based on analysis of the fault characteristics, an equivalent model of the multi-type DGs under symmetrical/asymmetrical fault conditions is established. A fast-iterative fault calculation method for enhancing the calculation efficiency while avoiding local convergence is then proposed using an improved particle swarm optimization (PSO) algorithm. A simulation system of the distribution network with multi-type DGs is established in PSCAD/EMTDC. The simulation results validate the high accuracy and calculation efficiency of the proposed calculation method of the fault components. This can assist in the settings of the protection threshold.

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Section: Fault Current Characteristics Of the Dfigmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Equivalent model of multi-type distributed generators under faults with fast-iterative calculation method based on improved PSO algorithm

Wang

Song

Liang

et al. 2021

Prot Control Mod Power Syst

View full text Add to dashboard Cite

show abstract

“…Low-voltage-ride through (LVRT) capability is one of the major grid code obligations of grid-tied PV systems, requiring a PV system to stay connected during network disturbances, and requiring it to support the grid in restoring its terminal voltage following a disturbance to the nominal value, within a pre-defined time frame as set or programed [13][14][15][16][17].…”

Section: Motivationmentioning

confidence: 99%

Transient Stability Enhancement of a Grid-Connected Large-Scale PV System Using Fuzzy Logic Controller

2021

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This paper presents a new intelligent control strategy to augment the low-voltage ride-through (LVRT) potential of photovoltaic (PV) plants, and the transient stability of a complete grid system. Modern grid codes demand that a PV plant should be connected to the main power system during network disturbance, providing voltage support. Therefore, in this paper, a novel fuzzy logic controller (FLC) using the controlled cascaded strategy is proposed for the grid side converter (GSC) of a PV plant to guarantee voltage recovery. The proposed FLC offers variable gains based upon the system requirements, which can inject a useful amount of reactive power after a severe network disturbance. Therefore, the terminal voltage dip will be low, restoring its pre-fault value and resuming its operation quickly. To make it realistic, the PV system is linked to the well-known IEEE nine bus system. Comparative analysis is shown—using power system computer-aided design/electromagnetic transients including DC (PSCAD/EMTDC) software—between the conventional proportional–integral (PI) controller-based cascaded strategy and the proposed control strategy to authenticate the usefulness of the proposed strategy. The comparative simulation results indicate that the transient stability and the LVRT capability of a grid-tied PV system can be augmented against severe fault using the proposed FLC-based cascaded GSC controller.

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“…These new systems converse the operating mode and rectify the detected sag and faults in the system by applying a reactive current into the circuit depending upon the depth of sag during normal conditions [23]. The most common issue is disconnection from the grid of PV inverter due to variation of grid voltage as it affects the stability of the power network [29,30]. Disconnection of PV System causes (1) Dc-link overvoltage (2) Excessive Ac Current (3) Loss of grid Synchronization.…”

Section: Faultsmentioning

confidence: 99%

“…The comparison shows that DC-Link voltage regulation is done better with D-MPPT (loss maintenance cost). But the efficiency is low [30]. To provide, a robust control process and better power quality in the GCPV system.…”

Section: Faultsmentioning

confidence: 99%

Performance of Grid-Connected Photovoltaic and Its Impact: A Review

Bisoyi¹,

Maurya²,

Binod³

et al. 2021

Intelligent Sustainable Systems

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The fast depletion of fossil fuels has created a quest for alternate energy sources to take care of the increased load demands Solar energy is the most abundant form of renewable energy available to us than any other source of energy. The photovoltaic energy generated on a large scale and connected to the grid will produce everlasting power. This paper offers a detailed review of the grid-connected photovoltaic (GCPV) system and the different management and techniques related to it. Various aspects of the GCPV system have been explained throughout the paper which covers many different algorithms and software such as MATLAB, PVsyst6.7, etc. dedicated to researching many possible merits and demerits of the system. As the ever-increasing need for alternatives, this paper would provide a better understanding and knowledge of the GCPV system as a whole.

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Performance Comparison of Active and Passive LVRT strategies for Grid Connected PV Systems

Cited by 6 publications

References 10 publications

Equivalent model of multi-type distributed generators under faults with fast-iterative calculation method based on improved PSO algorithm

Equivalent model of multi-type distributed generators under faults with fast-iterative calculation method based on improved PSO algorithm

Transient Stability Enhancement of a Grid-Connected Large-Scale PV System Using Fuzzy Logic Controller

Performance of Grid-Connected Photovoltaic and Its Impact: A Review

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