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A study of novel real-time power balance strategy with virtual asynchronous machine control for regional integrated electric-thermal energy systems

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Science China(Technological Sciences) 2024年第7期67卷 2074-2086页

作者： WANG Rui LI Ming-Jia WANG YiBo SUN QiuYe zhang pinjia College of Information Science and Engineering Northeastern UniversityShenyang 110819China School of Mechanical Engineering Beijing Institute of TechnologyBeijing 100081China Department of Electrical Engineering Tsinghua UniversityBeijing 100084China

The development of regional integrated electric-thermal energy systems(RIETES) is considered a promising direction for modern energy supply systems. These systems provide a significant potential to enhance the comprehensive utilization and efficient management of energy resources. Therein, the real-time power balance between supply and demand has emerged as one pressing concern for system stability operation. However, current methods focus more on minute-level and hour-level power optimal scheduling methods applied in RIETES. To achieve real-time power balance, this paper proposes one virtual asynchronous machine(VAM) control using heat with large inertia and electricity with fast response speed. First, the coupling timescale model is developed that considers the dynamic response time scales of both electric and thermal energy systems. Second, a real-time power balance strategy based on VAM control can be adopted to the load power variation and enhance the dynamic frequency response. Then, an adaptive inertia control method based on temperature variation is proposed, and the unified expression is further established. In addition, the small-signal stability of the proposed control strategy is validated. Finally, the effectiveness of this control strategy is confirmed through MATLAB/Simulink and HIL(Hardware-in-the-Loop) experiments.

关键词： regional integrated electric-thermal energy systems real-time power balance virtual asynchronous machine adaptive inertia small-signal stability

A Novel Hybrid Seven-Level Converter for Permanent Magnet Synchronous Motor Driving System Based on Model Predictive Control

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CES Transactions on Electrical Machines and Systems 2019年第4期3卷 389-396页

作者： Yuansheng Hu Cungang Hu pinjia zhang Yunlei zhang Electrical Engineering and Automation Anhui UniversityHefeiCO 230000 China Department of Electrical Engineering Tsinghua UniversityBeijingCO 100000 China

A novel hybrid three-phase seven-level converter is proposed in the *** phase consists of a four-level bridge and a two-level H bridge,which contains ten switching devices and a floating *** circuit structure is introduced and working principle of the converter containing 14 commutation paths is analyzed,which is easy to control the floating capacitor *** order to drive permanent magnet synchronous motor(PMSM)with the proposed converter,model predictive control(MPC)strategy is *** control objectives such as controlling the currents of PMSM and capacitor voltages balancing are included in a cost function with two weight factors,which can control the currents of PMSM and balance the capacitor voltages *** validate the proposed control scheme,simulations in two cases are carried out by using Matlab/Simulink ***,the feasibility and efficiency in two cases are verified with the experimental test bench based on RT_LAB.

关键词： Capacitor voltages MPC PMSM Seven-Level converter

Predictive Current Control for Voltage Source Inverters Considering Dead-Time Effect

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CES Transactions on Electrical Machines and Systems 2020年第1期4卷 35-42页

作者： Yu Li Zhenbin zhang Kejun Li pinjia zhang Feng Gao School of Electrical Engineering Shandong UniversityJinanChina Shandong University China Department of Electrical Engineering Tsinghua University as an Associate ProfessorChina

This paper proposes a new concept of synthesized voltage vector to address dead-time effect issue for Finite Control Set Model Predictive Control(FCS-MPC)*** a voltage source inverter(VSI),dead-time is inevitably inserted between the turn off and turn on instants of power devices to avoid short circuit *** influence of dead-time leads to output voltage vector error of three-phase ***,it will result in computing deviation in cost function,and will deteriorate the performance of the system if not properly dealt *** this paper,the problem is clearly analyzed,and the solution to this issue is proposed by introducing a synthesized voltage *** proposed solution is verified by Hardware-in-the-loop(HiL)test in real time,and results validate the effectiveness of the proposed solution.

关键词： Dead-time model predictive control voltage source inverter.

一种基于门极电压阈值检测的SiC MOSFET结温在线监测方法

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中国电机工程学报 2020年第18期40卷 5742-5750页

作者：张擎昊张品佳电力系统及大型发电设备安全控制和仿真国家重点实验室(清华大学) 北京市海淀区100084

碳化硅(silicon carbide,SiC)金属–氧化物半导体场效应晶体管(metal-oxide-semiconductorfield-effect transistor,MOSFET)作为第三代功率器件的代表,已被广泛用于小容量高频领域,其可靠性问题备受关注。结温过高是制约SiC MOSFET可靠性的重要因素。然而,碳化硅器件高开关频率增大了动态参数测量的难度和成本。与硅基器件相比,其导通压降和导通电阻等稳态参数对结温的敏感性较低。因此,主流的热敏电参数法无法有效地在线监测结温。已有研究表明:门极阈值电压与结温密切相关,但这种通过门极阈值电压监测结温的方法易受电流震荡影响且测量电路复杂,故监测效果差强人意。为此,文中提出一种新型的基于门极电压阈值检测的SiC MOSFET结温监测方法。首先,理论推导结温与门极阈值电压之间的解析表达式,发现其呈线性关系。其次,提出一种多项式拟合门极阈值电压测量方法,并设计与之匹配的电流采样测量电路。最后,通过基于H桥单相逆变电路的在线监测试验证明该方法的有效性。研究表明:新型结温监测方法具有以下突出优势:1)不易受开关过程震荡的影响,监测精度高;2)测量电路简单可靠,仅用采样电路和滤波器即可,毋需复杂的捕捉电路;3)对采样频率具有一定的容差性。

关键词：碳化硅器件金属–氧化物半导体场效应晶体管可靠性在线监测结温

基于漏电流测量的配电网电缆高精度状态感知技术研究

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中国电机工程学报 2022年第8期42卷 2929-2939页

作者：吴阳张品佳电力系统及大型发电设备控制和仿真国家重点实验室(清华大学电机系) 北京市海淀区100084

作为配电网中能量传输的主要载体,地下电缆的安全、可靠运行已逐渐成为配电网可靠性的关键。目前的研究集中于对电缆故障的及时切除以避免连锁故障的发生,然而仍然难以避免部分区域的停电,属于“被动”的保护方式。该文提出一种配电网... 详细信息

作为配电网中能量传输的主要载体,地下电缆的安全、可靠运行已逐渐成为配电网可靠性的关键。目前的研究集中于对电缆故障的及时切除以避免连锁故障的发生,然而仍然难以避免部分区域的停电,属于“被动”的保护方式。该文提出一种配电网电缆高精度状态感知技术。选择配电网中的共模漏电流为表征电缆绝缘状态的特征参数,并提出基于磁屏蔽原理的共模漏电流传感技术。在传感技术的基础上,进一步研究了基于共模信号注入的监测方法和电缆局部老化定位方法,实现对电缆老化状态的在线、定量估计和对多种局部老化情况的高精度定位。通过样机试验和仿真验证了所提方案的有效性。应用所提技术可以实现对老化电缆的针对性检修,实现配电网电缆运维模式由“被动”向“主动”的转变,减少绝缘故障,提高配电网的可靠性。

关键词：地下电缆配电网可靠性漏电流传感器在线监测局部老化定位

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CES Transactions on Electrical Machines and Systems 2023年第3期7卷 237-238页

作者： Xuhui Wen Tao Fan Dong Jiang Yinye Yang Xin zhang Yan Xu Xinhua Guo Shuangxia Niu Chaohui Liu Yihua Hu pinjia zhang Zhaoshun Gao Puqi Ning Institute of Electrical Engineering Chinese Academy of Sciences academic degree commission of IEE CAS Electric Vehicle Committee of China Electrotechnical Society Institute of Electrical Engineering of the Chinese Academy of Sciences Huazhong University of Science and Technology Mc Master University Zhejiang University Nanyang Technological University Huaqiao University Hong Kong Polytechnic University The National New Energy Vehicle Technology Innovation Center The University of York Tsinghua University

THE rapid growth of new energy vehicles is accelerating the low-carbon transition in the global transportation sector. According to the international energy agency report, more than 10 million electric vehicles(EVs) including pure electric and hybrid models were sold worldwide in 2022, which means that the global share of electric vehicles in the overall automotive market has risen from less than 5% in 2020 to 14% in 2022.

关键词： automotive transportation risen

交流电机定子绝缘故障诊断与在线监测技术综述

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中国电机工程学报 2019年第2期39卷 395-406页

作者：郑大勇张品佳清华大学电机系北京市海淀区100084

交流电机定子绝缘故障占故障总数中较大的一部分。其故障诊断和在线监测技术近年来逐渐成为研究的热点。文中分析定子绝缘老化的机理,然后从故障诊断和在线监测两个方面,对相关领域的主要方法和研究前沿进行整理和比较。对于故障诊断,... 详细信息

交流电机定子绝缘故障占故障总数中较大的一部分。其故障诊断和在线监测技术近年来逐渐成为研究的热点。文中分析定子绝缘老化的机理,然后从故障诊断和在线监测两个方面,对相关领域的主要方法和研究前沿进行整理和比较。对于故障诊断,重点分析故障初期的匝间短路故障的诊断方法。对于在线监测,对主绝缘和匝间绝缘的在线监测技术分别进行分析。最后提出目前研究中存在的问题及未来的发展方向。

关键词：交流电机定子绝缘故障故障诊断在线监测故障预警

VSC系统换流变压器共模模型及主绝缘在线监测方法

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中国电机工程学报 2021年第11期41卷 3885-3895页

作者：陆格野张品佳电力系统及大型发电设备安全控制和仿真国家重点实验室(清华大学电机系) 北京市海淀区100084

绝缘老化是威胁换流变压器安全运行的重要隐患,传统的绝缘监测方法难以实现可靠的换流变预防性保护。电压源型换流器(voltage sourced converter,VSC)输出电压特征谐波分量,可用于在线监测连接换流变的主绝缘健康状况。首先,探究VSC系... 详细信息

绝缘老化是威胁换流变压器安全运行的重要隐患,传统的绝缘监测方法难以实现可靠的换流变预防性保护。电压源型换流器(voltage sourced converter,VSC)输出电压特征谐波分量,可用于在线监测连接换流变的主绝缘健康状况。首先,探究VSC系统共模特征谐波用于换流变绝缘监测的可行性与优势。其次,构建YN/yn绕组接线的换流变共模电路模型,给出表征共模电压分布和绝缘电参数关系的数学模型。然后,定义压比频率响应和阻抗频率响应,对比电路模型和数学模型,说明两者的等效性。在线实验结果验证基于VSC系统共模特征谐波监测换流变主绝缘老化的有效性。该所述方法具有如下优势:1)不改变系统原有拓扑结构,无需安装额外的测试设备;2)对监测状态量的分析方法简单直观;3)监测结果不受系统工况波动和高频干扰的影响。

关键词：电压源型换流器变压器模型绝缘在线监测共模谐波

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CES Transactions on Electrical Machines and Systems 2021年第4期5卷 271-272页

作者： Ronghai Qu Shoudao Huang Jianxin Shen Fengge zhang Xiuhe Wang Metin Aydin Xiaoyong Zhu Yongxiang Xu Zhuoran zhang Gaolin Wang pinjia zhang Hong Li Dawei Li academic degrees committee State and Province Joint Engineering Research Center of Novel Electrical Machines Center for Advanced Electrical Machines and Drives(CAEMD) State Key Laboratory of Advanced Electromagnetic Engineering and Technology Hunan University China Zhejiang University China Shenyang University of Technology China Shandong University China Kocaeli University Turkey Jiangsu University China Harbin Institute of Technology China Nanjing University of Aeronautics and Astronautics China Tsinghua University China Huazhong University of Science and Technology China

IN recent years,4th Industrial Revolution and Industry 4.0 have swept the world and deeply influenced the development of global industry *** movement arises wide attention to electric motor drive system which is playing an increasing important role in energy consumption transformation and environment *** this tremendous change in industry field,the concept of high-efficient,energy-saving and intelligent motor system has been *** one hand,motor system with advantages such as low vibration,low noise,weak magnetic interference,renewable utilization capacity,high-efficiency and high-reliability could promote the progress of major industries such as mining,renewable energy and cutting-edged equipment *** the other hand,the realization of intelligent and automated operations of motor drive system would help boosting the automation of industrial production.

关键词： operations realization boosting