Improved Adaptive Droop Control Design for Optimal Power Sharing in VSC-MTDC Integrating Wind Farms

Ran, Xiaohong; Miao, Shihong; Wu, Yingjie

doi:10.3390/en8077100

Cited by 8 publications

(6 citation statements)

References 20 publications

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“…When two or more DG units operate in parallel in a microgrid, the droop method is often adopted to share the load based on the power rating of each DG unit [32,33]. The power-sharing performance of the droop method is strongly affected by the inner voltage control loop.…”

Section: Resultsmentioning

confidence: 99%

Improved Direct Deadbeat Voltage Control with an Actively Damped Inductor-Capacitor Plant Model in an Islanded AC Microgrid

2016

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Abstract:A direct deadbeat voltage control design method for inverter-based microgrid applications is proposed in this paper. When the inductor-capacitor (LC) filter output voltage is directly controlled using voltage source inverters (VSIs), the plant dynamics exhibit second-order resonant characteristics with a load current disturbance. To effectively damp the resonance caused by the output LC filter, an active damping strategy that does not cause additional energy loss is utilized. The proposed direct deadbeat voltage control law is devised from a detailed, actively damped LC plant model. The proposed deadbeat control method enhances voltage control performance owing to its better disturbance rejection capability than the conventional deadbeat or proportional-integral-based control methods. The most important advantage of the proposed deadbeat control method is that it makes the deadbeat control more robust by bringing discrete closed-loop poles closer to the origin. Simulation and experimental results are shown to verify the enhanced voltage control performance and stability of the proposed voltage control method.

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Section: Resultsmentioning

confidence: 99%

Improved Direct Deadbeat Voltage Control with an Actively Damped Inductor-Capacitor Plant Model in an Islanded AC Microgrid

2016

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“…The * equals to zero according to standard and the * is equal to iq−. The contribution of GC-VSC to the PCC voltage support is mathematically written in (3) and (4) according to VDE-AR-N 4120 [23,28].…”

Section: Control Strategymentioning

confidence: 99%

“…Two-level three-phase voltage source converters (VSCs) are widely used as grid-feeding inverters, which are controlled resembling a current source in many applications, especially in renewable energy systems, high voltage DC transmission systems and microgrids [1][2][3][4][5][6][7], among others. Among linear current controllers, the most extended solutions are those based on using the following reference frames: natural abc, synchronous dq0 and stationary αβ0.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Control for Improving the Operation of Grid-Connected Power Converters under Faulty and Saturated Conditions

et al. 2018

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In renewable energy based systems Grid-Connected Voltage Source Converters (GC-VSC) are used in many applications as grid-feeding converters, which transfer the power coming from the renewable energy sources to the grid. In some cases, the operation of GC-VSC may become unstable or uncontrollable due to, among others: a grid fault or an inappropriate current-power reference, that give rise to fast electrical transients or a saturation of the controller. In this paper, an improved control scheme is proposed to enhance the controllability of GC-VSC in all these situations. This solution consists of two parts, on the one hand a new Proportional-Resonant (PR) controller with anti-windup capability to be used as current controller, and secondly a new current/power reference modifier, which defines the suitable reactive current/power reference to keep the system stable. It is worth to mention that the proposed scheme does not need information about the grid parameters as it only uses the converter current, and the voltage at the capacitors of Inductor-Capacitor (LC) output filter.

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“…At present, the voltage control strategies of DC grid supply are master‐slave control [6], droop control [7, 8] and voltage margin control [9], as well as their combination control [10, 11]; each control strategy has its applicable scope, the droop control strategy with controllable DC voltage and active power [12]. DC grid supply should be adapted to the large number of converter station.…”

Section: Introductionmentioning

confidence: 99%

Research on DC grid control and analysis method based on pilot voltage

Zhu

et al. 2018

J. eng.

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Improved Adaptive Droop Control Design for Optimal Power Sharing in VSC-MTDC Integrating Wind Farms

Cited by 8 publications

References 20 publications

Improved Direct Deadbeat Voltage Control with an Actively Damped Inductor-Capacitor Plant Model in an Islanded AC Microgrid

Improved Direct Deadbeat Voltage Control with an Actively Damped Inductor-Capacitor Plant Model in an Islanded AC Microgrid

Enhanced Control for Improving the Operation of Grid-Connected Power Converters under Faulty and Saturated Conditions

Research on DC grid control and analysis method based on pilot voltage

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