Siyuan Liu

Hunan Normal University

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Chaosheng Song

Chongqing University

Yingsan Geng

Xi'an Jiaotong University

Caichao Zhu

Chongqing University

Zhiyuan Liu

University of Science and Technology Beijing

Marjan Popov

Delft University of Technology

Chengcheng Liang

Chongqing University

Yifan Chen

University of Electronic Science and Technology of China

Jianhua Wang

Jiangnan University

Dongdong Tong

Xi'an Jiaotong University

J. Chen

Xi'an Jiaotong University

Cooperative Institutions

Xi'an Jiaotong University

Chinese Academy of Sciences

State Key Laboratory of Electrical Insulation and Power Equipment

Chongqing University

Hunan Normal University

University of Chinese Academy of Sciences

Northwestern Polytechnical University

Sun Yat-sen University

Harbin Institute of Technology

Central South University

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Investigation on the DC CB Performance During a Current Interruption Failure at First Current Zero

Siyuan Liu Yingsan Geng Marjan Popov Jianhua Wang Zhiyuan Liu

The vacuum interrupter is used as the key component of an active DCCB due to its excellent interruption and dielectric recovery characteristics after current zero. The vacuum interrupter can only interrupt the fault currents below the limitation of a critical di/dt and TIV, otherwise it causes a reignition and the interruption failure. In this paper, a detailed active injection DC CB model is developed, considering operation delay of switches, parasitic parameters of switches and thorough control logic. The limitation dielectric strength between the vacuum gap is defined by the cold break down voltage. Based on the numerical modelling, investigation will be performed to see the performance of DC CB with a failure interruption on the first current zero. The simulation results can help to optimize the injection circuit parameters when DC CB has a failure on the first current zero and has to interrupt in the next current zeros. This algorithm will consider predefined threshold of di/dt, chopping current and variable operation time in different scenarios.

Interrupter

Transient recovery voltage

Transient (computer programming)

Dielectric strength

Zero (linguistics)

Fault current limiter

10.1109/deiv.2018.8537159

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Citations (4)

An Improved Cascade Extended State Observer with CVGI Based SMESO for PMSM Sensorless Control

2021 24th International Conference on Electrical Machines and Systems (ICEMS) (2023)

Siyuan Liu Ling Liu Baoling Shao Deliang Liang

This paper presents a sensorless drive system for permanent magnet synchronous motor (PMSM) control. Including a sliding mode extended state observer (SMESO) based on complex vector generalized integrator (CVGI) for back-EMf estimating and an improved cascade extended state observer (ICESO) for speed, position estimation. Introducing CVGI into SMESO as part of its internal dynamics can take advantage of its phase-locked characteristics to eliminate chattering without introducing phase lag. ICESO solves the high frequency noise sensitivity and peaking phenomenon of the high gain observer by reducing the gain with cascade characteristics and introducing saturation function respectively. Besides, since load torque is set as the extended state of ICESO. The load torque value is also observed and feedforward compensated to the current loop, thus improving the load robustness and dynamic performance of the motor drive system. The effectiveness and performance of the proposed schemeis verified by the simulation results.

Observer (physics)

10.1109/icems59686.2023.10345056

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Citations (0)

Research on Multi-objective Optimization for The Key Parameters of Modal Analysis on Induction Motor

Yusheng Hu Bin Chen Suhua Lu Siyuan Liu Liyi Li

In order to reduce electromagnetic noise of permanent magnet synchronous motors, it is necessary to analyze the modal of motor. In this paper, the modal of induction motor is studied by applying the key modal parameters such as the orthotropic material properties of core, contact stiffness factor, and the bearing stiffness. Compared with the actual modal test results finally, the modal simulation frequency of the motor error is kept within 5%.This method has guiding significance for modal simulation of similar structure motors.

10.1109/icems.2019.8922498

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Citations (3)

Mechanical DC circuit breaker model for real time simulations

International Journal of Electrical Power & Energy Systems (2018)

Siyuan Liu Zhou Liu Jose de Jesús Chávez Marjan Popov

The main goal of the paper is the modeling of the mechanical circuit breaker (MCB) that can replicate the breaker characteristics in real time environment. The proposed MCB with active current injection is modelled for a system level, which provides adequate representation of the circuit breakers for system analysis studies. External current-voltage characteristics of the proposed MCB models replicate the ones of the devices in the real world. It is well known that the DC circuit breaker (DCCB) needs to interrupt DC faults very quickly in order to avoid converter damages. The total current interruption time consists of fault detection time, time needed for the DC protection to provide command to the DCCB, and DCCB arc clearing time. Thus, it is necessary to demonstrate the system performance of associated protective devices through real time simulation, before these devices can be implemented and commissioned in practice. This paper presents a detailed modeling of the mechanical DCCB in real time simulation environment based on RTDS. The performance of the model is verified by the simulations based on PSCAD and meaningful conclusions are drawn.

Replicate

Transient recovery voltage

10.1016/j.ijepes.2018.11.014

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Citations (38)

Geometric parameter design and contact characteristics of beveloid gear and involute cylindrical gear transmission with crossed axes

Journal of Mechanical Science and Technology (2024)

Gaoxiang Ni Zhanqi Liu Chaosheng Song Siyuan Liu Yuanfa Dong

Cycloid gear

Involute gear

Hobbing

Contact analysis

Non-circular gear

Pressure angle

Bevel gear

Ellipse

Tooth surface

10.1007/s12206-024-0128-7

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Citations (5)

Research on the Dynamic Characteristics of Vacuum Arc Under Halbach Arrays-Based AMF

Hongyi Chen Siyuan Liu Jingyong Jin Xianglai Bo Zhiyuan Liu

Vacuum arc

Halbach array

10.1109/icepe-st61894.2024.10792622

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Citations (0)

Electric Current Density Factor and it's Distribution

Yingyong jichu yu gongcheng kexue xuebao (2004)

Siyuan Liu Junjie Liu Tao Ao Bai Xiangzhoical

The electric current density factor near the crack tip was determined in a thin current-carrying plate with a middle-crack.Through the relationship beteewn the electric current density and the temperature field, the expression of the electric current density factor and the temperature field was deduced. As an example, the distribution of the electric current density factor near the crack tip was described.This work is the fundamental theory on crack arresting by application of electrothermal effect.

Electric current

Source

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Citations (5)

Effects of machine-tool parameters on geometry and contact pattern for face hobbed hypoid gears

Meccanica (2022)

Chengcheng Liang Chaosheng Song Caichao Zhu Siyuan Liu Francesco Cadini

Tooth surface

Base (topology)

10.1007/s11012-022-01517-5

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Citations (7)

Analysis of the solid breakdown characteristics under high voltage pulse

Powder Technology (2024)

Zongsheng Sun Guanghui Yan Siyuan Liu Mingrui Zhang Pengfei Zhao

Breakage

High Voltage

Particle (ecology)

Solid surface

10.1016/j.powtec.2024.119753

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Citations (0)

Development of HVDC system-level mechanical circuit breaker model

International Journal of Electrical Power & Energy Systems (2018)

Siyuan Liu Marjan Popov

The main goal of the paper is the modelling of the mechanical direct current circuit breaker (DC CB) with active current injection that includes different circuit breaker characteristics. System level models provide adequate representation of the circuit breakers for system analysis studies. The performance characteristics of the DC CB in those proposed models replicate the ones of the devices in practice. The developed mechanical circuit breaker model is realized for a 320 kV demonstration circuit in PSCAD environment and its limitations and robustness are analyzed. The performance of the model is investigated by different cases. The obtained results show that the DC CB model can be used with full success for both to simulate DC fault interruptions and to be used for different protection studies.

Robustness

Fuse (electrical)

Replicate

10.1016/j.ijepes.2018.05.017

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Citations (38)