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.
(1) The discrete model of paralleled 3P2L inverters is established, based on which the improved control scheme is designed in detail. The output variables of the controllers for circulating current suppression are directly generated by the modified model, while the tedious tuning process for control parameters is avoided.
Circulating current suppression can effectively improve the reliability and redundancy of parallel inverter systems. The mechanism and influencing factors of the low- and high-frequency zero-sequence circulating current (ZSCC) are analyzed in this study.
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This paper presents a circulating current control method for paralleled three-level neutral point clamped (NPC) inverter. The analytical model that describes the circulating …
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The parallel operation of inverters has many benefits, such as modularity and redundancy. However, the parallel connection of inverters produces circulating currents that …
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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. The …
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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, …
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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 …
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To validate the effectiveness of this control architecture, experiments were conducted using a 30-kVA grid emulator and three 5–10 kVA, 208-V three-phase inverters.
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Abstract The parallel architecture is very popular for power inverters to increase the power level. This paper presents a method for the parallel operation of inverters in an ac-distributed …
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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 …
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This paper introduces an innovative methodology for designing a synergetic controller (SYC) aimed at eliminating circulating currents and regulating speed in two parallel …
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The three-phase two-level (3P2L) inverter has salient features of simple structure, superior output waveforms, and low system cost [1]. Thus, it has been extensively used in …
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This paper proposes a novel zero sequence circulating current suppression scheme based on the zero sequence circulating current model of parallel inverters. The …
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Whereas, current researches about active current sharing method in paralleled inverter systems mainly focus on single or three-phase three-leg inverter (3p3l). Compared to the 3p3l inverter, …
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This paper provides an investment on the three-level Space vector modula-tion and proposes a new strategy to eliminating the circulating current for paralleled three-level t …
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The parallel operation of inverters has many benefits, such as modularity and redundancy. However, the parallel connection of inverters produces circulating currents that …
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