Research on MMC-HVDC multi-objective model predictive control strategy under asymmetric faults

Zhang, Jianpo; Hu, Ziwei; Tian, Xincheng

doi:10.1016/j.egyr.2020.11.218

Cited by 5 publications

(4 citation statements)

References 8 publications

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“…Based on Equation (13), we obtain the sum of all the capacitive energy in the system W MMC−sum , and the rate of change in W MMC−sum is the difference between AC and DC power:…”

Section: Energy Fluctuation Controlmentioning

confidence: 99%

“…The MMC [10][11][12][13][14] control system is divided into three parts, which are system level control, converter level control and valve level control [15], in which the converter level is mainly used for active and re-energy fluctuation control, DC voltage control and so on. The current MMC project's converter (a two-level voltage source converter, 2L-VSC) adopts the double closed-loop vector control derived from the two-level voltage source converter.…”

Section: Introductionmentioning

confidence: 99%

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Study of Energy Flow Mechanisms in High Power Device Converters

Zhao,

Jin,

et al. 2024

Energies

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The work in this paper is applied to the Zhangbei Power grid. In the flexible direct current (DC) power system, the fault current rises extremely fast when a DC fault occurs. The requirements for the peak of breaking current and fault energy absorption of DC circuit breakers (DCCBs) increase linearly, which significantly increases the cost of the equipment. Therefore, in order to reduce the design difficulty of DCCBs, this paper proposes a strategy to control energy after the fault occurs. Firstly, the energy dimension is added on the basis of the traditional vector control of MMC, which constitutes a three-dimensional energy direct control. Subsequently, the architectures of energy fluctuation control and feedforward control are proposed. The influencing mechanisms for the peak fault current, peak fault voltage and energy dissipation are analyzed. Finally, the simulation of energy fluctuation control and feedforward control is constructed on PSCAD/EMTDC. The simulation results show that the energy fluctuation control is obviously better than the conventional three-dimensional energy control, and the feedforward energy control is further improved on this basis. Compared with the conventional vector control, the peak energy is reduced by 45.43% and the peak current is reduced by 25.39%, which helps to simplify the equipment design and reduce the equipment cost.

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“…Based on Equation (13), we obtain the sum of all the capacitive energy in the system W MMC−sum , and the rate of change in W MMC−sum is the difference between AC and DC power:…”

Section: Energy Fluctuation Controlmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study of Energy Flow Mechanisms in High Power Device Converters

Zhao,

Jin,

et al. 2024

Energies

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“…145 Recently, a new enhanced tube-based MPC (T-MPC) technique has been proposed by authors, which deliberately enhanced the capability of current and amplitude of power ripple. 146 A coordinated control approach consisting of primary and secondary control has been proposed for all micro-sources and ESSs. 147 FESS has a faster response rate, so it usually gets engaged in the primary control, whereas other micro-sources such as microturbine (MT) and fuel cell (FC) are associated with secondary control of frequency.…”

Section: Control Approach Stability Enhancement and Maintenance Of Fessmentioning

confidence: 99%

“…Field oriented control (FOC) and direct torque control (DTC) are employed to regulate the speed of the FESS 144 . The model predictive control (MPC) method is more efficient than the PI controller as it procures better accuracy in response to flywheel speed control and regulation of DC‐link voltage 145 . Recently, a new enhanced tube‐based MPC (T‐MPC) technique has been proposed by authors, which deliberately enhanced the capability of current and amplitude of power ripple 146…”

Section: Control Approach Stability Enhancement and Maintenance Of Fessmentioning

confidence: 99%

Flywheel energy storage systems: A critical review on technologies, applications, and future prospects

Choudhury

2021

Int Trans Electr Energ Syst

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Energy storage systems (ESSs) are the technologies that have driven our society to an extent where the management of the electrical network is easily feasible. The balance in supply-demand, stability, voltage and frequency lag control, and improvement in power quality are the significant attributes that fascinate the world toward the ESS technology. However, being one of the oldest ESS, the flywheel ESS (FESS) has acquired the tendency to raise itself among others being eco-friendly and storing energy up to megajoule (MJ). Along with these, FESS also surpasses the quality of high power density, longer life cycle, higher rate of charge and discharge cycle, and greater efficiency. In this article, an overview of the FESS has been discussed concerning its background theory, structure with its associated components, characteristics, applications, cost model, control approach, stability

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