Low‐voltage ride‐through control for photovoltaic generation in the low‐voltage distribution network

He, Yufei; Wang, Minghao; Jia, Youwei; Zhao, Jian; Xu, Zhao

doi:10.1049/iet-rpg.2019.1101

Cited by 22 publications

(12 citation statements)

References 28 publications

(80 reference statements)

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“…Te power factor correction circuit is mostly after a series of fltering and rectifcation of the AC power, then carrying out the control adjustment of power factor correction [9]. In the charger, due to the large power of the whole machine, especially under low voltage and high current, the loss that occurs on the rectifer bridge when the current is rectifed by the rectifer bridge cannot be ignored [10]. Terefore, the traditional bridge PFC topology structure due to the existence of the rectifer bridge, the efciency of the whole machine cannot be further improved [11].…”

Section: Introductionmentioning

confidence: 99%

High-Performance Control Simulation of PFC Converter for Electric Vehicle Charger

Zhu

Sun

Jia

2023

Journal of Control Science and Engineering

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In order to solve the problems of low power factor and large harmonic pollution of some electrical equipment connected to the power grid, such as electric vehicle charger system, the author proposes a high-performance control simulation study of a PFC converter for electric vehicle charger. Using the staggered parallel boost power factor correction circuit topology of electric vehicle chargers as the front stage, its high power factor and low harmonic current characteristics can reduce the pollution to the power grid, and the detailed design process and loss analysis of the circuit are given. Through the digital control method and hardware optimization design, the loss is reduced, and the conversion efficiency of the power factor correction converter in the full power range is high, which meets the efficiency requirements of the platinum version and achieves the goal of energy saving and environmental protection. The test results show that the actual efficiency of the experimental prototype is 97.43%, 97.55%, and 97.36%, which are far higher than the efficiency requirements of the platinum version. Conclusion. The high-performance control of the PFC converter of the electric vehicle charger has certain guiding significance for the application in the electric vehicle.

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Section: Introductionmentioning

confidence: 99%

High-Performance Control Simulation of PFC Converter for Electric Vehicle Charger

Zhu

Sun

Jia

2023

Journal of Control Science and Engineering

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“…Therefore, the power balance on both sides of the photovoltaic gridconnected inverter can be quickly realized, and the LVRT of the photovoltaic power generation system can be completed. In the process of LVRT of the photovoltaic system, in addition to controlling the output power of photovoltaic power sources, the close cooperation of photovoltaic inverters is also inseparable (He et al, 2020;Jia et al, 2020;Li et al, 2021). The grid-connected photovoltaic inverter needs to provide reactive current to the grid when the grid voltage drops to support the recovery of the grid voltage, which is another key to meeting the requirements of photovoltaic LVRT.…”

Section: Lvrt Control Strategy With Adaptive Maximum Power Trackingmentioning

confidence: 99%

Nonlinear Control Method of Photovoltaic Power Generation LVRT Based on Adaptive Maximum Power Tracking

et al. 2022

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With the continuous increase in the scale of photovoltaic grid connection, the impact of the safe and stable operation of photovoltaic power generation systems on the grid cannot be ignored. When a short-term failure of the power grid occurs, the large-scale disconnection of the unit will seriously affect the stability of the grid voltage and frequency. Therefore, this paper proposes a non-linear control method for photovoltaic power generation low voltage ride through (LVRT) based on adaptive maximum power tracking. This method adaptively adjusts the power tracking trajectory through the feedforward control of the voltage drop amplitude. Cooperating with the nonlinear control of the grid-connected inverter, this method can quickly and effectively control the power output of photovoltaic cells on the basis of providing appropriate reactive power support, so as to realize the rapid response of grid system. Through the simulation in PSCAD, it is verified that the control method described in this article can well realize the LVRT in different amplitudes of the photovoltaic system, especially when zero voltage drops occur.

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“…Nowadays, grid‐connected inverters must have a low voltage ride‐through (LVRT) feature which means they have to be connected to the network and support it in low voltage conditions by injecting reactive power according to the standard diagrams [1–5]. Implementing this feature for an inverter requires some considerations to avoid potential problems.…”

Section: Introductionmentioning

confidence: 99%

Adjustable unbalanced current controller for tranformerless PV generation to suppress DC voltage ripples of inverter in low‐voltage ride‐through (LVRT) operation

Kadri

Ebrahimi

Pouresmaeil

2022

IET Renewable Power Gen

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Low voltage ride-trough (LVRT) feature is compulsory for each grid-connected inverter to support the grid by injecting reactive power in low voltage conditions. It is well known that the operation of an inverter in a normal grid condition is different from its operation in a faulty one. One of the detrimental effects of working in a faulty grid is ripples in the DC bus voltage due to the active power oscillation caused by unbalance voltages. Here, a new control system based on unbalance current injection is proposed to eliminate these ripples. For the analysis, a four-leg inverter is considered in a transformerless microgrid. Then, instantaneous power constraints, which are imposed by the capacity of the inverter, and low voltage ride-through necessities are considered to achieve the required reference currents. In addition, constant power strategy is used as a power control method and essential reference currents for this condition are presented. Moreover, the required reference currents are achieved to eliminate the ripples in the DC bus voltage when the constant power strategy cannot be performed because of current limitation restriction. Finally, simulation results are presented to prove the effectiveness of the proposed controller in different conditions.

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Low‐voltage ride‐through control for photovoltaic generation in the low‐voltage distribution network

Cited by 22 publications

References 28 publications

High-Performance Control Simulation of PFC Converter for Electric Vehicle Charger

High-Performance Control Simulation of PFC Converter for Electric Vehicle Charger

Nonlinear Control Method of Photovoltaic Power Generation LVRT Based on Adaptive Maximum Power Tracking

Adjustable unbalanced current controller for tranformerless PV generation to suppress DC voltage ripples of inverter in low‐voltage ride‐through (LVRT) operation

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