Frequency-based current-sharing techniques for paralleled power converters

Perreault, David J.; Selders, R.L.; Kassakian, J.G.

doi:10.1109/pesc.1996.548715

Cited by 32 publications

(21 citation statements)

References 18 publications

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“…This 1-bit feedback signal can be implemented either using a very simple single-interconnect or zero-interconnect communications link, or by encoding the information to communicate it directly via the series string interconnect. (We note that such methods are well known in other types of distributed power conversion systems [10] and can be implemented without significant expense in this application.) One disadvantage of this method is that it would require the global controller (the inverter in a typical installation) to implement this functionality, such that separate dedicated hardware and firmware is required at the inverter level.…”

Section: ) 1-bit Feedback Global Algorithmmentioning

confidence: 94%

Submodule Integrated Distributed Maximum Power Point Tracking for Solar Photovoltaic Applications

Pilawa-Podgurski

Perreault

2013

IEEE Trans. Power Electron.

282

112

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Abstract-This paper explores the benefits of distributed power electronics in solar photovoltaic applications through the use of sub-module integrated maximum power point trackers (MPPT). We propose a system architecture that provides a substantial increase in captured energy during partial shading conditions, while at the same time enabling significant overall cost reductions. This is achieved through direct integration of miniature MPPT power converters into existing junction boxes. We describe the design and implementation of a high-efficiency (>98%) synchronous buck MPPT converter, along with digital control techniques that ensure both local and global maximum power extraction. Through detailed experimental measurements under real-world conditions, we verify the increase in energy capture and quantify the benefits of the architecture.

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Section: ) 1-bit Feedback Global Algorithmmentioning

confidence: 94%

Submodule Integrated Distributed Maximum Power Point Tracking for Solar Photovoltaic Applications

Pilawa-Podgurski

Perreault

2013

IEEE Trans. Power Electron.

282

112

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“…Through droop control, emulating synchronous generators, sharing powers between inverter-based DGs was firstly proposed [6]. Droop control schemes with many advantages such as flexibility, redundancy, and expandability can be categorized for four main groups: (1) conventional and variants of the droop control [6,13]; (2) virtual framework structure-based method [14,15]; (3) "construct and compensate" based methods [16,17]; and (4) the hybrid droop/signal injection method [18,19]. The details and characters of various control schemes were illustrated in [5].…”

Section: Introductionmentioning

confidence: 99%

Optimal Design and Real Time Implementation of Autonomous Microgrid Including Active Load

2018

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Abstract:Controller gains and power-sharing parameters are the main parameters affect the dynamic performance of the microgrid. Considering an active load to the autonomous microgrid, the stability problem will be more involved. In this paper, the active load effect on microgrid dynamic stability is explored. An autonomous microgrid including three inverter-based distributed generations (DGs) with an active load is modeled and the associated controllers are designed. Controller gains of the inverters and active load as well as Phase Locked Loop (PLL) parameters are optimally tuned to guarantee overall system stability. A weighted objective function is proposed to minimize the error in both measured active power and DC voltage based on time-domain simulations. Different AC and DC disturbances are applied to verify and assess the effectiveness of the proposed control strategy. The results demonstrate the potential of the proposed controller to enhance the microgrid stability and to provide efficient damping characteristics. Additionally, the proposed controller is compared with the literature to demonstrate its superiority. Finally, the microgrid considered has been established and implemented on real time digital simulator (RTDS). The experimental results validate the simulation results and approve the effectiveness of the proposed controllers to enrich the stability of the considered microgrid.

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“…To improve the system reliability, the current sharing problem has been extensively addressed [9]. Control schemes for parallel power converters can be roughly categorized into the droop method [10] and active current sharing technique [11]. The goals of both schemes are to make the parallel power converters having equal output current.…”

Section: Introductionmentioning

confidence: 99%

Integrated voltage regulation and current-sensorless power tracking control for a DC hybrid power system

Xie

Sun

Freudenberg

2008

2008 American Control Conference

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Abstract-Hybrid power systems combine two or more complementary power generation technologies to achieve the system performance that is not possible for those involving a single power technology. The complicated dynamic interactions of the hybrid power system elements, coupled with stringent safety, power quality and efficiency requirements, impose challenging control and dynamic optimization problems. This paper presents a novel approach that addresses the voltage regulation and power tracking problems for hybrid DC power system. A DC power network consisting of two power sources is considered. A nonlinear dynamic model is developed, and a nonlinear controller is employed to achieve: (1) DC bus voltage regulation; (2) current sensorless power tracking control. Both the dynamic model and the nonlinear controller are validated with simulation and experiment results. The results show that the nonlinear controller can effectively achieve the system performance objective.

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Frequency-based current-sharing techniques for paralleled power converters

Cited by 32 publications

References 18 publications

Submodule Integrated Distributed Maximum Power Point Tracking for Solar Photovoltaic Applications

Submodule Integrated Distributed Maximum Power Point Tracking for Solar Photovoltaic Applications

Optimal Design and Real Time Implementation of Autonomous Microgrid Including Active Load

Integrated voltage regulation and current-sensorless power tracking control for a DC hybrid power system

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