Adaptive control design for VSC-HVDC systems based on backstepping method

Ruan, Si-Ye; Li, Guojie; Jiao, Xiaohong; Sun, Yuanzhang; Lie, Tek Tjing

doi:10.1016/j.epsr.2006.05.006

Cited by 91 publications

(61 citation statements)

References 9 publications

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“…Ordinary, one degree of rectifier is used as reactive power controller, and the other is used to control the DC voltage [20]. Amplitude modulation ratio (M r ) and phase angle (PH r ) are two input control signals of HVDC rectifier.…”

Section: Power System Equipped By Hvdcmentioning

confidence: 99%

Damping of power system oscillations using imperialist competition algorithm in power system equipped by HVDC

Banaei

Toloue

Kazemi

et al. 2015

Ain Shams Engineering Journal

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In this paper, a linear model of power system equipped by HVDC parallel installed with HVAC is investigated. The HVDC system is mainly composed by voltage source converters (VSC-HVDC). So, there are four adjustable variables to control the power system characteristics. In this regards, one of these variables can be used as a supplementary controller input, in order to damp the oscillations efficiently. In this work the Singular Value Decomposition (SVD) method is used to realize the most effective control input of VSC-HVDC, with the aim of low frequency oscillation damping. Besides, optimum values for supplementary controller gains, are found using imperialist competition algorithm. To confirm strength of the proposed controller, the designed controller is tested in wide range of operating condition and compared with conventional scheme. The main advantage of the proposed procedure is greatly improving the dynamic response of the system. In addition, the overshoots, undershoots and the settling times are dramatically reduced by applying the proposed method. Simulation results show the good operation of proposed method so as to damp power system oscillations.Ó 2014 Production and hosting by Elsevier B.V. on behalf of Ain Shams University.

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Section: Power System Equipped By Hvdcmentioning

confidence: 99%

Damping of power system oscillations using imperialist competition algorithm in power system equipped by HVDC

Banaei

Toloue

Kazemi

et al. 2015

Ain Shams Engineering Journal

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“…The origins of these uncertainties can be disturbances, system parameters changes, and inaccurate measurement. All these uncertainties are accumulated in one term [54]. The uncertain term " " is estimated through adaptive disturbance estimation technique.…”

Section: B State Space Modelmentioning

confidence: 99%

A Flexible Control Strategy for Grid-Connected and Islanded Microgrids With Enhanced Stability Using Nonlinear Microgrid Stabilizer

Ashabani

Mohamed

2012

IEEE Trans. Smart Grid

188

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The energy sector is moving into the era of distributed generation (DG) and microgrids (MGs). The stability and operation aspects of converter-dominated DG MGs, however, are faced by many challenges. Important among these, are: 1) the absence of physical inertia; 2) comparable size of power converters; 3) mutual interactions among generators; 4) islanding detection delays; and 5) large sudden disturbances associated with transition to islanded mode, grid restoration, and load power changes. To overcome these difficulties, this paper presents a new large-signal-based control topology for DG power converters that is suitable for both gridconnected and islanding modes of operation without any need to reconfigure the control system and without islanding detection. To improve MG stability, the proposed control structure is realized via two steps. First, an emulated inertia and damping functions are adopted. Second, to guarantee stability and high performance of the MG system during sudden harsh transients such as islanding, grid reconnection, and large load power changes, a nonlinear MG stabilizer is proposed. An augmented converter model is developed and used to design the MG stabilizer via the adaptive backstepping (AB) technique to guarantee large-angle stability and robustness against unmodeled dynamics. Theoretical analysis and evaluation results are presented to show the effectiveness of the proposed control scheme in achieving stable and smooth operation of a MG system in grid-connected, islanding, and transition modes. Index Terms-Grid-connected, islanded microgrid, microgrid, power stability, supplementary control. NOMENCLATURE Voltage frequency. Virtual rotor flux. Voltage angle. Current frequency. Power angle. Virtual electrical torque. Current angle.Virtual rotor momentum of inertia.

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“…Parameter uncertainties of a VSC-HVDC system have been studied in [4]. Inner current loop uncertainties have been considered in [5] and an adaptive backstepping control method is proposed. A backstepping power controller is proposed in [6] integrating wind farms, without considering the DC voltage controller dynamics.…”

Section: Introductionmentioning

confidence: 99%

Backstepping DC Voltage Control in a Multi-terminal HVDC System Connecting Offshore Wind Farms

Zhao

Xue

2014

Communications in Computer and Information Science

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Abstract. Wind power is projected to play an important role in the current and future power systems. To integrate offshore wind farms to the existing onshore grid, voltage source converters (VSCs) based high voltage direct current (HVDC) transmission have drawn considerable interests from researchers and industries. As the most important variable in a DC system, DC voltage indicates the power balance between different terminals thus must be maintained in a safe range. To distribute transmitted wind power among distinct onshore AC grids, different operation modes need to be considered. This paper proposes to interoperate the backstepping DC voltage control method between various operation modes. DC cable dynamics are included in the DC voltage controller design to eliminate the effect of DC transmission line. Simulation is carried out in Matlab/Simulink to verify the backstepping enhanced DC voltage control method. It is shown that the transient stability can be improved with the backstepping method.

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Adaptive control design for VSC-HVDC systems based on backstepping method

Cited by 91 publications

References 9 publications

Damping of power system oscillations using imperialist competition algorithm in power system equipped by HVDC

Damping of power system oscillations using imperialist competition algorithm in power system equipped by HVDC

A Flexible Control Strategy for Grid-Connected and Islanded Microgrids With Enhanced Stability Using Nonlinear Microgrid Stabilizer

Backstepping DC Voltage Control in a Multi-terminal HVDC System Connecting Offshore Wind Farms

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