A New Real Time Lyapunov Based Controller for Power Quality Improvement in Unified Power Flow Controllers Using Direct Matrix Converters

Monteiro, José; Pinto, Sónia; Martín, Aránzazu D.; Silva, Fernando

doi:10.3390/en10060779

Cited by 15 publications

(10 citation statements)

References 22 publications

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“…On the right-hand side of Equation (8), i SA , v SA , and v A are not related to v a,b c or i A,B,C in Equations (1) and (2), which means the prediction, i SA [k + 1], is independent of the switch states. Therefore, this prediction model Equation (8) cannot be straightforwardly used, and it is not suitable for MPC.…”

Section: Prediction Models Of the Matrix Converter And Loadmentioning

confidence: 99%

“…The direct matrix converter (MC) carries out direct AC-to-AC power conversion, and it does not require any bulky energy storage elements. This converter provides many benefits, including bidirectional power flow, controllable input power factor, compact volume, and higher power density [1][2][3][4]. Therefore, MCs attract tremendous research interest and are proposed for many application areas.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Sequential Model Predictive Control of Three-Phase Direct Matrix Converter

Zhang

Norambuena

et al. 2019

Energies

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The matrix converter (MC) is a promising converter that performs the direct AC-to-AC conversion. Model predictive control (MPC) is a simple and powerful tool for power electronic converters, including the MC. However, weighting factor design and heavy computational burden impose significant challenges for this control strategy. This paper investigates the generalized sequential MPC (SMPC) for a three-phase direct MC. In this control strategy, each control objective has an individual cost function and these cost functions are evaluated sequentially based on priority. The complex weighting factor design process is not required. Compared with the standard MPC, the computation burden is reduced because only the pre-selected switch states are evaluated in the second and subsequent sequential cost functions. In addition, the prediction model computation for the following cost functions is also reduced. Specifying the priority for control objectives can be achieved. A comparative study with traditional MPC is carried out both in simulation and an experiment. Comparable control performance to the traditional MPC is achieved. This controller is suitable for the MC because of the reduced computational burden. Simulation and experimental results verify the effectiveness of the proposed strategy.

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Section: Prediction Models Of the Matrix Converter And Loadmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sequential Model Predictive Control of Three-Phase Direct Matrix Converter

Zhang

Norambuena

et al. 2019

Energies

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“…There are also a lot of studies carried out regarding the power flow control and applications in [15][16][17][18][19][20][21]. The optimal power flow control methods of UPFC aiming to improve the transfer capability of the system are studied in [15,16].…”

Section: Introductionmentioning

confidence: 99%

“…A hybrid electromagnetic model of UPFC with more flexibility was proposed in [17]. In [18], a new real time Lyapunov based controller in UPFC was investigated to improve the power quality. In [19][20][21], several power flow control strategies and approaches of UPFC were designed for damping the power flow oscillations and enhancing the power system stability.…”

Section: Introductionmentioning

confidence: 99%

Regulation Principles of Power Flow Gradients to Multiple Characteristic Independent Variables in UPFC Embedded Power System

Liu

Yang

et al. 2020

Applied Sciences

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The power flows in the unified power flow controller (UPFC) embedded system is mainly regulated by the two variables containing the magnitude and the phase angle of the output series inserted voltage (OSIV) of UPFC. Different value combinations of the two variables can form multiple regulation modes of OSIV, and the regulation principles and efficiencies for power flows are distinct by different regulation modes. This paper dedicates to research the regulation principles of active and reactive power flow gradients (PFG) to multiple characteristic independent variables (CIVs) at several selected critical points (SCP) of the system in different operation conditions. The CIVs contains the magnitude of OSIV, the phase angle of OSIV, and the phase difference of the system. First, multiple power flow regulation modes of OSIV are designed, the mathematical models of the PFG to each CIV at each SCP are established, and the theoretical principles for the PFG to each CIV at each SCP are analyzed and compared. Next, four typical operation conditions of the system and four regulation scenarios are assumed and case studies for the PFG to each CIV at different SCP are carried out. The test results at each SCP are analyzed both in the two-dimensional planes and three-dimensional spaces. The regulation principles and efficiencies of PFG to each CIV at different SCP are compared with each other and summarized, which can offer useful references for practical engineering and applications of UPFC.

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“…In this regard, Flexible Alternating Current Transmission System (FACTS) devices have been being applied to improve the transmission capability [2]. Among FACTS devices, the unified power flow controller (UPFC) is the most versatile device which can control all basic power system parameters including voltage amplitude and angle, line impedance, and power flows [3,4].…”

Section: Introductionmentioning

confidence: 99%

Preventive Security-Constrained Optimal Power Flow Considering UPFC Control Modes

Zhou

Liu

et al. 2017

Energies

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Abstract:The successful application of the unified power flow controller (UPFC) provides a new control method for the secure and economic operation of power system. In order to make the full use of UPFC and improve the economic efficiency and static security of a power system, a preventive security-constrained power flow optimization method considering UPFC control modes is proposed in this paper. Firstly, an iterative method considering UPFC control modes is deduced for power flow calculation. Taking into account the influence of different UPFC control modes on the distribution of power flow after N-1 contingency, the optimization model is then constructed by setting a minimal system operation cost and a maximum static security margin as the objective. Based on this model, the particle swarm optimization (PSO) algorithm is utilized to optimize power system operating parameters and UPFC control modes simultaneously. Finally, a standard IEEE 30-bus system is utilized to demonstrate that the proposed method fully exploits the potential of static control of UPFC and significantly increases the economic efficiency and static security of the power system.

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A New Real Time Lyapunov Based Controller for Power Quality Improvement in Unified Power Flow Controllers Using Direct Matrix Converters

Cited by 15 publications

References 22 publications

Sequential Model Predictive Control of Three-Phase Direct Matrix Converter

Sequential Model Predictive Control of Three-Phase Direct Matrix Converter

Regulation Principles of Power Flow Gradients to Multiple Characteristic Independent Variables in UPFC Embedded Power System

Preventive Security-Constrained Optimal Power Flow Considering UPFC Control Modes

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