Coordinated Control Strategies of VSC-HVDC-Based Wind Power Systems for Low Voltage Ride Through

Zhang, Xinyin; Wu, Zheng-Mao; Hu, Minqiang; Li, Xianyun; Lv, Guorong

doi:10.3390/en8077224

Cited by 25 publications

(22 citation statements)

References 24 publications

(25 reference statements)

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“…The second LVRT method is applicable for both types 3 and 4, where a dc chopper is connected across the dc link between the RSC and grid-side converter (GSC), as shown in Figure 7, to dissipate the additional energy and stop the evolution of the magnetic flux of the machine. However, this method is more expensive than conventional crowbar circuit [21,22]. The third method is relatively novel, where a superconducting fault current limiter (SFCL) is connected between the RSC and GSC as shown in Figure 8.…”

Section: Modelling and Integration Of Supplementary Controlsmentioning

confidence: 99%

Provision of Ancillary Services by Wind Power Generators

Attya¹,

Domínguez‐García²

2020

Advances in Modelling and Control of Wind and Hydrogenerators

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The current and future power systems foresee very deep penetration of renewable power plants into the generation mix, which will make the provision of ancillary services by renewables an ultimate necessity. This would be further emphasised when green power stations replace conventional power plants that rely on fossil fuels. In this context, many control methodologies could be applied to the controllers of the green generators to enable the provision of these services, mainly frequency support and voltage regulation. Most of the available models (i.e. in power system simulators) do not include such supplementary controls to provide ancillary services. Hence, this chapter exploits key examples of these controllers that proved to be efficient and widely accepted. In addition, this chapter considers their integration into the conventional controls of green generators, where the focus is on wind energy.

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Section: Modelling and Integration Of Supplementary Controlsmentioning

confidence: 99%

Provision of Ancillary Services by Wind Power Generators

Attya¹,

Domínguez‐García²

2020

Advances in Modelling and Control of Wind and Hydrogenerators

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“…The machine side converter (MSC) is used to control the generator speed or the generator active power to catch maximum power from available wind power . The grid‐side converter is used to control the dc‐link voltage and transfers the active power fed from the MSC to the grid; meanwhile, it also regulates the reactive power exchanged with the grid …”

Section: Introductionmentioning

confidence: 99%

“…8,9 The grid-side converter is used to control the dc-link voltage and transfers the active power fed from the MSC to the grid; meanwhile, it also regulates the reactive power exchanged with the grid. 10 The WT equivalent shaft is relatively softer than the typical turbine shaft in conventional power plants. 11 The effective stiffness of the WT shaft is inversely proportional to the generator pole pairs, 12 and thus, the WT with larger number of the pole pairs has the softer drive train shaft.…”

mentioning

confidence: 99%

Efficient modification of the control system in PMSG-based wind turbine for improvement of the wind turbine dynamic response and suppression of torsional oscillations

Rahimi

Beiki

2018

Int Trans Electr Energ Syst

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Summary This paper first deals with the dynamic performance evaluation and stability analysis of permanent magnet synchronous generator‐based wind turbine. Then, the permanent magnet synchronous generator speed control system is modified, and an efficient control approach is proposed for suppression of electromechanical oscillations in drive train system. Generator speed feedback‐based active compensation techniques employing high pass, band pass, or notch filters have been widely used to actively damp the torsional electromechanical oscillations in variable speed wind turbines. However, usefulness of these approaches is highly dependent on the filter parameters, and thus, their performance may be failed when existing uncertainty in shaft stiffness changes the drive train resonance frequency. To overcome this issue, a new active method is proposed for damping improvement of drive train torsional oscillations. The proposed method increases the effective damping of the drive train system by adding a damping torque component that is proportional to the speed difference between the turbine and generator. The speed difference between the turbine and generator is provided by estimation of shaft torsional torque. It is shown that the proposed active damping method has superior efficacy in damping of torsional electromechanical oscillations with and without considering the model uncertainty.

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“…In literatures, also, there are commonly 2 control structures for the grid-connected PMSG based WTs 11 : (1) In the first control structure, MSC is used for the generator output power/speed control, and the GSC for keeping the dc-link voltage constant; [12][13][14][15] (2) In the second control structure, the MSC is used for the control of the dc-link capacitor voltage, and the GSC for the output power control. [16][17][18][19][20] As mentioned in Alizadeh and Yazdani 16 and Hansen and Michalke 17 in the second control structure, the sensitivity of the PMSG active power to variations of the wind speed and drive train oscillations is lower than that in the first control mode.…”

Section: Introductionmentioning

confidence: 99%

Mathematical modeling, dynamic response analysis, and control of PMSG‐based wind turbines operating with an alternative control structure in power control mode

Rahimi

2017

Int Trans Electr Energ Syst

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Summary This paper deals with the detailed mathematical modeling, in‐depth stability analysis, and control of PMSG‐based wind turbine (WT), when PMSG works with an alternative control structure. In the alternative control structure, machine‐side converter (MSC) is used for control of the dc‐link voltage and grid‐side converter (GSC) for control of the output power. In this way, full linearized dynamics of the dc‐link model is achieved by using the equivalent current based model of the MSC and GSC. Based on the system detailed linearized representation, it is shown that the dc‐link dynamics is non‐minimum phase with a right half plane (RHP) zero, where the RHP zero depends on operating point and changes under wind speed variation. Hence, due to stability issue, careful considerations are considered for selection of the dc‐link controller parameters, and necessary conditions are proposed to guarantee the closed‐loop system stability at all operating conditions. Then, the dc‐link control system is modified by introducing an auxiliary compensation block which virtually adds a positive damping resistor in parallel with the dc‐link capacitor. Next design considerations for selection of the auxiliary compensation term are proposed, and finally response of the system is examined by the several time domain simulations.

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Coordinated Control Strategies of VSC-HVDC-Based Wind Power Systems for Low Voltage Ride Through

Cited by 25 publications

References 24 publications

Provision of Ancillary Services by Wind Power Generators

Provision of Ancillary Services by Wind Power Generators

Efficient modification of the control system in PMSG-based wind turbine for improvement of the wind turbine dynamic response and suppression of torsional oscillations

Mathematical modeling, dynamic response analysis, and control of PMSG‐based wind turbines operating with an alternative control structure in power control mode

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