Aug 28, 2019 · Abstract In this study, the third harmonic injection method based on analogue circuit is applied in the interleaving parallel three-phase four-leg (3P4L) inverter, the adverse
In this study, according to zero-sequence current modelling of fourth leg, the control strategy for suppressing circulating current is proposed. Meanwhile, a control method based on average
Aug 1, 2024 · To suppress the CMV and circulating current simultaneously, an improved control method is presented. At first, the discrete model of paralleled 3P2L inverters is established,
Oct 29, 2019 · Abstract In this study, the third harmonic injection method based on analogue circuit is applied in the interleaving parallel three-phase four-leg (3P4L) inverter, the adverse
Apr 12, 2018 · In this study, according to zero-sequence current modelling of fourth leg, the control strategy for suppressing circulating current is proposed.
Mar 2, 2006 · A novel circulating zero-sequence current-control method for common DC-source parallel inverter systems is proposed and implemented in FPGA. The follower inverter can
Apr 1, 2022 · This paper presents the control strategy for parallel operation of an inverter to eliminate DC & AC circulating current. This paper also analyses the cross-current between
In reference [3], a composite control algorithm for the CRH2 EMU auxiliary power supply system was designed. The double closed-loop control algorithm based on current decoupling was
Jan 24, 2024 · The operation of parallel inverters in microgrids is an important way to expand system capacity, but there are problems of circulating current
If parameters of three-phase inverters in parallel are different, there will be circulation current between the parallel inverters. Circulation current leads to the increase of energy loss,
Sep 27, 2024 · This paper introduces an inverter control strategy based on improved virtual oscillator control that enables autonomous parallel operation of inverters. Compared to
For this dual loop based on output voltage and inductor current feedback control is constantly adopted for one or three-phase inverters, in which the proportional–integral (PI) in the outer
Dec 1, 2010 · This paper presents state-of-the-art review of control methods applied currently to parallel power electronic inverters. Different system architecture
Dec 18, 2024 · This paper introduces an innovative methodology for designing a synergetic controller (SYC) aimed at eliminating circulating currents and regulating speed in two parallel
Nov 16, 2022 · Unique pitfalls in parallel three-level T-type inverters (3LT2 Is) are potential zero-sequence circulating currents (ZSCCs) which are more complex
Oct 31, 2018 · When connecting two parallel three-phase voltage source inverters between the same DC power supply and AC bus, a zero-sequence circulating current will occur.
Jun 1, 2020 · In order to effectively suppress the generation of circulation, this paper proposes a multiple proportional resonance control strategy for the parallel three-phase inverter system,
Aug 15, 2020 · This paper provides an investment on the three-level Space vector modulation and proposes a new strategy to eliminating the circulating current for paralleled three-level t-type
Nov 1, 2017 · Parameters of parallel three-phase inverters are inevitably different, which causes circulation current among inverters. Circulation current will increase energy loss, distortion of
Sep 13, 2024 · Parallel inverters have the advantages of low-output harmonics and high-parallel power, making them very suitable as the topology structure
Nov 1, 2016 · In the distributed generation environment, parallel operated inverters play a key role in interfacing renewable energy sources with the grid or forming a grid. This can be achieved
Jan 13, 2021 · Abstract: In this study, according to zero-sequence current modelling of fourth leg, the control strategy for suppressing circulating current is proposed. Meanwhile, a control
May 30, 2020 · Firstly, this paper introduces the main problem of parallel operation of multi-inverter, namely the circulation between inverters. According to the analysis of the circulation
Feb 1, 2023 · A high level of circulation current causes inverter power losses to increase, which lowers the system''s overall performance by decreasing its efficiency. In this paper, a novel
Apr 24, 2020 · Simulation and analysis of three-phase parallel inverter using multicarrier pulse width modulation such as phase disposition (PD), phase opposition disposition (POD) and
Nov 25, 2023 · Equation (1) utilizes the Park transformation to convert the voltages and currents of the three-phase inverter to stationary d-q axes. This simplifies the control system, allowing
Jun 22, 2024 · This paper proposes a novel zero sequence circulating current suppression scheme based on the zero sequence circulating current model of parallel inverters. The
Oct 23, 2018 · The configuration of modular paralleled three-level T-type inverters (3LT 2 Is) has been widely utilised to extend the system power rating. However, zero sequence circulating
Shao et al. have developed a circulating current control loop for parallel three-level inverters when two distribution factors are introduced into the zero-sequence modulation function in order to eliminate the low-frequency circulating current and to control neutral point potential.
It can be clearly seen that the circulating currents among different inverters are well suppressed, and the stable operation of the parallel system are guaranteed with equal and unequal reference currents. When comparing with Fig. 12, Fig. 18, the magnitudes of circulating currents become slightly larger.
This article put forward an improved control method for parallel-configured 3P2L inverters, so as to suppress the circulating current and CMV simultaneously. The output variable of the controller for circulating current suppression was directly generated by adopting the system model, and the tedious tuning of control parameters was eliminated.
This paper provides an investment on the three-level Space vector modulation and proposes a new strategy to eliminating the circulating current for paralleled three-level t-type inverters. Results obtained confirmed the performance and the effectiveness of the proposed circulating current control strategy.
However, the circulating current results from the common connection of both AC and DC sides directly can increase the current stresses and conduction losses of the switching devices and reduces inverters efficiency.
Another problem is the common-mode voltage (CMV), which causes electromagnetic interference and threatens the safe operation of the system. There exists interconnection between these two issues in the paralleled 3P2L inverters. To suppress the CMV and circulating current simultaneously, an improved control method is presented.
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