Recent developments of modulation and control for high-power current-source-converters fed electric machine systems

Liu, Pengcheng; Wang, Zheng; Wei, Sanmin; Yang, Bo; Pu, Shaoning

doi:10.30941/cestems.2020.00027

Cited by 10 publications

(4 citation statements)

References 40 publications

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“…Stability analysis approaches for a multi-inverter-fed power system should adapt to the replacement of synchronous generators in traditional power systems by clean, inverter-based resources [1]. Unstable problems, such as those induced by the coupling between grids and grid-connected inverters (GCIs), have been analysed [2][3][4]. The internal parameters, control methods, structure, and other information pertaining to gridconnected inverters at engineering sites are unknown owing to the technical confidentiality restrictions imposed by the equipment supplier.…”

Section: Introductionmentioning

confidence: 99%

A black‐box method for the stability analysis of multi‐inverter‐fed power systems using Bode diagrams

Li,

Wu,

et al. 2024

IET Generation Trans & Dist

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A multi‐inverter‐fed power system is susceptible to small‐signal instability owing to weak grid influence. This study proposes a black‐box method for small‐signal stability analysis of a multi‐inverter‐fed power system based on Bode diagrams. Not only did it consider the technical confidentiality on the engineering site, but it also took into account the presence of right‐half‐plane (RHP) pole in the aggregated impedance, achieving Nyquist circle acquisition through Bode diagrams. The stability analysis process is thus more accurate, intuitive, and convenient. First, black‐box impedance fitting for a single grid‐connected inverter and impedance aggregation for a multi‐inverter‐fed power system are discussed. Second, the principle of the proposed method is elaborated. Using the Bode diagram, the number of RHP poles of the aggregated impedance and actual number of circles for Nyquist curves are identified. Third, a multi‐inverter‐fed power system is constructed, and the effectiveness of the proposed method is verified using case analysis and hardware‐in‐the‐loop real‐time experiments based on RT‐LAB. Finally, the advantages of the proposed method are revealed by comparing it to the IF method.

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Section: Introductionmentioning

confidence: 99%

A black‐box method for the stability analysis of multi‐inverter‐fed power systems using Bode diagrams

Li,

Wu,

et al. 2024

IET Generation Trans & Dist

View full text Add to dashboard Cite

show abstract

“…Stability analysis approaches for a multi-inverterfed power system should adapt to the replacement of synchronous generators in traditional power systems by clean, inverter-based resources [1]. Unstable accidents, such as those induced by the coupling between grids and grid-connected inverters (GCIs), have been reported [2][3][4]. The internal parameters, control methods, structure, and other information pertaining to grid-connected inverters at engineering sites are unknown owing to the technical confidentiality restrictions imposed by the equipment supplier.…”

Section: Introductionmentioning

confidence: 99%

A Grey Box Method for the Stability Analysis of Multi-Inverter-Fed Power Systems using Bode Diagrams

LI,

Wu,

et al. 2023

Preprint

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A multi-inverter-fed power system is susceptible to small-signal instability owing to weak grid influence. Using the impedance-frequency (IF) method to analyse system stability at engineering sites has the following limitations: 1) The internal information of a grid-connected inverter is unknown because of technical confidentiality. Thus, its impedance model should fit in a grey box. 2) The IF method defaults to the subsystem aggregation impedance without right-half-plane (RHP) poles, which may result in incorrect stability analysis. 3) The data used for drawing the IF curve should be calculated per frequency, which is time-consuming. To address these limitations, this study proposes a grey box method for small-signal stability analysis of a multi-inverter-fed power system based on Bode diagrams. First, grey box impedance fitting for a single grid-connected inverter and impedance aggregation for a multi-inverter-fed power system are discussed. Second, the principle of the proposed method is elaborated. Using the Bode diagram, the number of RHP poles of the aggregated impedance and actual number of circles for Nyquist curves are identified. Third, a multi-inverter-fed power system is constructed, and the effectiveness of the proposed method is verified using case analysis and hardware-in-the-loop real-time experiments based on RT-LAB. Finally, the advantages of the proposed method are revealed by comparing it to the IF method.

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“…The main advantage of the induction motor is that it eliminates all sliding contacts, resulting in an exceedingly simple and rugged construction. Moreover, the rapid development of new induction machines and the emerging of power drive technologies in the past few decades, ranging from a few watts to many megawatts [17], enables them to be used in many fields involving conversion processes [18], whether in the generation, transmission, or electrical energy consumption [19]. Therefore, the electrical motors and drives are used in industrial, commercial, and domestic applications such as transportation systems [20,21], rolling mills [22], paper machines [23], textile mills [24], machine tools [25], pumps [26], robots [27], fans [28], and vehicle propulsion [29], among others [30].…”

Section: Introductionmentioning

confidence: 99%

Advances in Power Quality Analysis Techniques for Electrical Machines and Drives: A Review

et al. 2022

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The electric machines are the elements most used at an industry level, and they represent the major power consumption of the productive processes. Particularly speaking, among all electric machines, the motors and their drives play a key role since they literally allow the motion interchange in the industrial processes; it could be said that they are the medullar column for moving the rest of the mechanical parts. Hence, their proper operation must be guaranteed in order to raise, as much as possible, their efficiency, and, as consequence, bring out the economic benefits. This review presents a general overview of the reported works that address the efficiency topic in motors and drives and in the power quality of the electric grid. This study speaks about the relationship existing between the motors and drives that induces electric disturbances into the grid, affecting its power quality, and also how these power disturbances present in the electrical network adversely affect, in turn, the motors and drives. In addition, the reported techniques that tackle the detection, classification, and mitigations of power quality disturbances are discussed. Additionally, several works are reviewed in order to present the panorama that show the evolution and advances in the techniques and tendencies in both senses: motors and drives affecting the power source quality and the power quality disturbances affecting the efficiency of motors and drives. A discussion of trends in techniques and future work about power quality analysis from the motors and drives efficiency viewpoint is provided. Finally, some prompts are made about alternative methods that could help in overcome the gaps until now detected in the reported approaches referring to the detection, classification and mitigation of power disturbances with views toward the improvement of the efficiency of motors and drives.

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Recent developments of modulation and control for high-power current-source-converters fed electric machine systems

Cited by 10 publications

References 40 publications

A black‐box method for the stability analysis of multi‐inverter‐fed power systems using Bode diagrams

A black‐box method for the stability analysis of multi‐inverter‐fed power systems using Bode diagrams

A Grey Box Method for the Stability Analysis of Multi-Inverter-Fed Power Systems using Bode Diagrams

Advances in Power Quality Analysis Techniques for Electrical Machines and Drives: A Review

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