PV Power System With Multi-Mode Operation and Low-Voltage Ride-Through Capability

Tang, Cheng-Yu; Chen, Yaoting; Chen, Yaow-Ming

doi:10.1109/tie.2015.2449777

Cited by 155 publications

(82 citation statements)

References 29 publications

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“…The boost DC-DC connected to the PV panels step up the voltage of the DC bus to a proper level for the PV inverter. The H-bridge DC-AC inverter produces PWM sinusoidal current injected into the grid based on the Maximum Power Point Tracking (MPPT) algorithms [12]. The voltages at the PCC are sampled for Phase Locked Loop (PLL), the injected grid current i g is sensed for current control and the capacitor current u c is sensed for active damping.…”

Section: System Configuration and Passive Damping Methodsmentioning

confidence: 99%

Resonance damping and parameter design method for LCL-LC filter interfaced grid-connected photovoltaic inverters

Jiang

Shen

et al. 2016

2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia)

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Abstract-In order to attenuate PWM harmonics effectively and reduce filter cost and volume, LCL-LC filter is proposed using a combination of LCL filter and an LC series resonant part. Compared with LCL filter, LCL-LC filter is characterized with decreased total inductance and better switch-frequency harmonics attenuation ability, but the resonant problem affects the system stability remarkably. In this paper, active damping based on the capacitor voltage feedback is proposed using the concept of the equivalent virtual impedance in parallel with the capacitor. With the consideration of system delay, this paper presents a systematic design method for the LCL-LC filtered grid-connected photovoltaic (PV) system. With this method, controller parameters and the active damping feedback coefficient are easily obtained by specifying the system stability and dynamic performance indices, and it is more convenient to optimize the system performance according to the predefined satisfactory region. Finally, the simulation results are presented to validate the proposed design method and control scheme.

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Section: System Configuration and Passive Damping Methodsmentioning

confidence: 99%

Resonance damping and parameter design method for LCL-LC filter interfaced grid-connected photovoltaic inverters

Jiang

Shen

et al. 2016

2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia)

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“…where I is the current amplitude value that will limit the inverter current to any predetermined value, as will be seen in Section III-C. As can be seen, the relationships between positive-and negative-sequence currents (17), (18) determine the fulfillment of the third objective (related to power quality), and the relation between active and reactive currents (24) determines the accomplishment of the first objective: optimal voltage support.…”

Section: B Optimal Voltage Support Strategymentioning

confidence: 99%

“…Now, using (24) in (21) and (22), the amplitudes of the positive-and negative-sequence voltages can be written as…”

Section: B Optimal Voltage Support Strategymentioning

confidence: 99%

Optimal Voltage-Support Control for Distributed Generation Inverters in RL Grid-Faulty Networks

Lopez

Vicuña

Miret

et al. 2020

IEEE Trans. Ind. Electron.

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During grid faults, the stability and reliability of the network are compromised, and the risk of a widespread disconnection of distributed generation power facilities is increased. Distributed generation inverters must support the power system to prevent this issue. Voltage support depends substantially on the currents injected into the grid and the equivalent grid impedance. This paper considers these two aspects and proposes an optimal voltage-support strategy in RL grids. The control algorithm guarantees a safe operation of the inverter during voltage sags by calculating the appropriate reference currents according to the equivalent impedance and the voltage sag characteristics, avoiding active power oscillations, and limiting the injected current to the maximum allowed by the inverter. Consequently, the grid can be better supported since the voltage at the point of common coupling is improved and the voltage support objectives are achieved. The proposed control strategy is validated through experimental tests in different grid scenarios. Throughout the work, it is assumed that the grid impedance is known, but the proposed solution requires calculating the grid impedance angle.

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“…To improve the output waveform quality and maintain safe operation by attenuating double-line-frequency voltage ripple during a grid voltage drop, a DC-link voltage adjustment method for the inverter is proposed [86]. The concept of multi-mode operation for PV power systems is presented to maintain balanced power [87]. According to the new standard Rule 21, the control strategies of PV system is given as below.…”

Section: B Control Strategiesmentioning

confidence: 99%

Power System Support Functions Provided by Smart Inverters—A Review

Zhao¹,

Chang²,

Shao³

et al. 2018

CPSS TPEA

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Renewable energy is seen as a viable alternative to traditional energy sources, and distributed generation (DG) based on renewable energy sources has experienced rapid growth worldwide. High penetration of renewable energy based DG systems makes the grid more vulnerable, and stricter standards have been issued for grid interconnection of DG systems. DG systems are expected to be controllable with high flexibility and reliability. Provision of grid support functions and ancillary services, such as reactive power control, fault ride-through and harmonic compensation, is the key to attaining higher utilization of DG. Such functionalities are implemented in new generation smart inverters, which can contribute to the reduced cost of energy and need for additional system resources. The state-of-the-art power system support functions are summarized in this paper for the purpose of enhancing operation in low-voltage networks. Experimental results are given to better understand the implementation of the functions.Index Terms-Fault ride-through, harmonic compensation, power system support functions, reactive power control, smart inverters.

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PV Power System With Multi-Mode Operation and Low-Voltage Ride-Through Capability

Cited by 155 publications

References 29 publications

Resonance damping and parameter design method for LCL-LC filter interfaced grid-connected photovoltaic inverters

Resonance damping and parameter design method for LCL-LC filter interfaced grid-connected photovoltaic inverters

Optimal Voltage-Support Control for Distributed Generation Inverters in RL Grid-Faulty Networks

Power System Support Functions Provided by Smart Inverters—A Review

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