A novel control scheme of a parallel current-controlled PWM inverter

Ogasawara, Satoshi; Takagaki, Jin; Akagi, Hirofumi; Nabae, Akira

doi:10.1109/28.158825

Cited by 181 publications

(67 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The bandwidth required for the shared reference signal, i * L LF , can be estimated for the multiple inverter case from (9). The corresponding bandwidth for the local signal is given in (10) for completeness…”

Section: A Connection Of Inverters With Different Ratingsmentioning

confidence: 99%

“…In such a case, the sharing of control signals will require a communication bus such as controller area network (CAN) Bus, FireWire, or ProfiBus. With such a communication link in place, control methods can be adopted that seek to provide dynamic sharing between the inverters [2], [3], [5], [9]. In the case of a power park and a explicit communication link, it is important to consider the bandwidth over which dynamic sharing is being sought and the limitations imposed by the implementation of the communication link.…”

mentioning

confidence: 99%

See 1 more Smart Citation

High-Quality Power Generation Through Distributed Control of a Power Park Microgrid

Prodanović

Green

2006

IEEE Trans. Ind. Electron.

288

127

View full text Add to dashboard Cite

Abstract-Inverters are a necessary interface for several forms of distributed generation (DG) and where they form a microgrid they have the potential to offer high power quality. The challenge is to coordinate the actions of a group of inverters so that they offer the level of power quality known to be possible from fast local control of a single inverter. The case examined here is a power park of several inverter-based DG in relatively close proximity. A basic requirement is that the inverters regulate the grid voltage and share the real and reactive power demands according to their ratings. In small girds with high proportions of nonlinear and unbalanced loads it is also important to actively control the waveform quality in terms of harmonics, transient disturbances, and balance. Further, it is important that these duties are shared equally between the units rather than having one master unit taking the lead in the voltage control function. A constraint faced in designing a sharing system is the limited bandwidth of signal communication even over distances of a few meters. A control method is proposed that separates the control tasks in the frequency domain. Power sharing and voltage regulation are controlled centrally and commands are distributed through a low-bandwidth communication link. Waveform quality functions are controlled in high bandwidth controllers distributed to each local inverter. Experimental tests on a grid of three 10-kVA inverters are used to show that the method fully exploits the inherent fast response of the inverters while also ensuring voltage balance even with extreme load imbalance. It is shown that circulating currents are avoided during steady state and transients.

show abstract

Section: A Connection Of Inverters With Different Ratingsmentioning

confidence: 99%

mentioning

confidence: 99%

High-Quality Power Generation Through Distributed Control of a Power Park Microgrid

Prodanović

Green

2006

IEEE Trans. Ind. Electron.

288

127

View full text Add to dashboard Cite

show abstract

“…Through parallel operation, low current rating semiconductor devices can be used without over-sizing a converter module [4]- [6]. When multiple converters are connected in parallel, an interleaved pulse-width modulation (PWM) method is widely used to decrease input and output current ripples.…”

Section: Introductionmentioning

confidence: 99%

Coupled Inductor-Based Parallel Operation of a qZ-Source Full-Bridge DC-DC Converter

Lee¹,

Kim²,

Cha³

et al. 2015

Journal of Power Electronics

View full text Add to dashboard Cite

This study presents a novel transformer isolated parallel connected quasi Z-source (qZ-source) full-bridge DC-DC converter that uses a coupled inductor in both the qZ-source network and output filter inductor. Unlike traditional voltage-fed or current-fed converters, the proposed converter can be open-and short-circuited without damaging switching devices. Therefore, the desired buck and boost functions can be achieved and converter reliability can be significantly improved. All the bulky inductors in the qZ-source network and output filter can also be minimized with the proposed inductor structures. A 4 kW prototype DC-DC converter is built and tested to verify the performance of the proposed converter.

show abstract

“…Zhang et al (2006b) and Liu et al (2011) analyzed the presence of harmonic circulating current caused by dead zone dispersion of switch, delay of driving circuit and over modulation, of which the dead zone of switch is the most influenced component. In recent years, some inhibition technologies of harmonic circulation current are proposed, including control method of the instantaneous voltage feedback, repetitive control method and dual-loop control method of voltage and current (Ogasawara et al 1992;Kawakami et al 1994).…”

Section: Introductionmentioning

confidence: 99%

Inhibition characteristics of circulating current in parallel inverter driving system of mine hoist

Yong

Xiao

2016

Int J Coal Sci Technol

View full text Add to dashboard Cite

This research investigated the outputting circulation current inhibition characteristic which are controlled by the instantaneous feedback voltage in inverter parallel driving of the mine hoist. We established a transfer function of the parallel inverters controlled by the close-loop adjustment of instantaneous voltage feedback. The influence of the parameters of the close-loop feedback circuit to the inhibition effects to the outputting circulation current is observed. After analyzing the circulating current inhibition characteristics, the proportion integration (PI) controller is introduced into the close-loop adjustment by instantaneous voltage feedback. The characteristics equation is gained to determine the PI parameters by drawing the Bode plots. The inhibition effects of the proposed controller are examined by the established simulation model of parallel inverter system. The harmonic distortion rate at the outputting voltage frequency value of 4, 10, 20, 41 and 50 Hz, are all lower than 2.32 % by the instantaneous outputting voltage feedback.

show abstract

A novel control scheme of a parallel current-controlled PWM inverter

Cited by 181 publications

References 15 publications

High-Quality Power Generation Through Distributed Control of a Power Park Microgrid

High-Quality Power Generation Through Distributed Control of a Power Park Microgrid

Coupled Inductor-Based Parallel Operation of a qZ-Source Full-Bridge DC-DC Converter

Inhibition characteristics of circulating current in parallel inverter driving system of mine hoist

Contact Info

Product

Resources

About