Analysis of droop control methods in DC microgrid

Gao, Fei; Gü, Yü; Bozhko, Serhiy; Asher, G.M.; Wheeler, Patrick

doi:10.1109/epe.2014.6910846

Cited by 21 publications

(13 citation statements)

References 15 publications

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“…6. Current sharing in steady-state among the parallel branches for LVF and GVF can be derived in (3) [27],   …”

Section: A Power Sharing Performancementioning

confidence: 99%

“…Existing droop control methods for voltage source converters (VSCs)-based DC MGs implement the basic concept of droop in different ways and can be grouped in two families; current/power mode droop, including Current-Voltage (I-V) and PowerVoltage (P-V) strategies and voltage mode droop, including V-I and V-P strategies [27]. The I-V and P-V droop methods are shown in Fig.…”

mentioning

confidence: 99%

“…3. Depending on the DC control strategy, the converter can be operated either in current-mode or in voltage-mode [27]. The current-mode droop control scheme is shown in Fig.…”

mentioning

confidence: 99%

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Comparative Stability Analysis of Droop Control Approaches in Voltage-Source-Converter-Based DC Microgrids

Gao

Bozhko

Costabeber

et al. 2017

IEEE Trans. Power Electron.

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192

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“…6. Current sharing in steady-state among the parallel branches for LVF and GVF can be derived in (3) [27],   …”

Section: A Power Sharing Performancementioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Comparative Stability Analysis of Droop Control Approaches in Voltage-Source-Converter-Based DC Microgrids

Gao

Bozhko

Costabeber

et al. 2017

IEEE Trans. Power Electron.

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192

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“…Depending on the control strategy, the EPS sources (PMSG-AR systems) can be controlled either as a voltage source or a current source [34]. The control scheme for voltage-mode droop controlled PMSG-AR is shown in Fig.…”

Section: System Architecturementioning

confidence: 99%

An Improved Voltage Compensation Approach in A Droop-Controlled DC Power System for the More Electric Aircraft

Gao

Bozhko

Asher

et al. 2015

IEEE Trans. Power Electron.

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137

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A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription.For more information, please contact eprints@nottingham.ac.uk 1 Abstract-This paper proposes an improved voltage regulation method in multi-source based DC electrical power system in the more electric aircraft. The proposed approach, which can be used in terrestrial DC microgrids as well, effectively improves the load sharing accuracy under high droop gain circumstance with consideration of cable impedance. Since no extra communication line and controllers are required, it is easily implemented and also increases the system modularity and reliability. By using the proposed approach the DC transmission losses can be reduced and system stability is not deteriorated for normal and fault scenarios. In this paper optimal droop gain settings are investigated and the selection of individual droop gains as well as the proportional power sharing ratio has been described. Experimental results validate the effectiveness of the proposed method.Index Terms-DC power system, droop control, load sharing, voltage deviation, transmission losses.

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“…The droop control method is applied in the traditional control method of the dc-bus voltage [4].The duty ratios of the DC-DC converters are controlled by the PI controllers which make the dc-bus voltage constant [5]. With the droop controllers and the PI controllers applied to the system, the response time may be long and the ripple of the dc-bus voltage may be large.…”

Section: Introductionmentioning

confidence: 99%

Parameters Designing of Slide Mode Variable Structure Controller of Bus Voltage of DC Microgrid Based on Proportion Switching Function

2017

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Abstract. Constant value control of the DC-bus voltage is a essential problem of the control system of the DC microgrids. DC-DC converters are applied in parallel to realize the transform of energy from the distributed generations (DGs) to the DC-bus. Droop control methods are applied to the DC-bus voltage while PI controllers are used in controlling the duty ratios of the converters. This method may bring out the slow response speed of the system accompanied by the large ripple of the voltage. The slide mode variable structure control can speed up the response and reduce the ripple of the voltage as well. In the traditional slide mode control based on the proportion switching function, the denominator of the transfer function of the controlled plant is a second-order characteristic polynomial without the constant term. The denominators of the transfer functions of the buck DC-DC converters contain the constant terms. The designing of the parameters of the slide mode control based on the proportion switching function is analyzed based on mathematics deductions. Simulation results show that the selected parameters can not only speed up the response of the system but also greatly reduce the ripple of the voltage.

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Analysis of droop control methods in DC microgrid

Cited by 21 publications

References 15 publications

Comparative Stability Analysis of Droop Control Approaches in Voltage-Source-Converter-Based DC Microgrids

Comparative Stability Analysis of Droop Control Approaches in Voltage-Source-Converter-Based DC Microgrids

An Improved Voltage Compensation Approach in A Droop-Controlled DC Power System for the More Electric Aircraft

Parameters Designing of Slide Mode Variable Structure Controller of Bus Voltage of DC Microgrid Based on Proportion Switching Function

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