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学者姓名：郑宗华
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Abstract ：
The pollution of the common connection point (CCP) in the power grid is the result of the interaction of multiple harmonic sources. In order to more accurately and fairly divide the harmonic responsibility and harmonic influence of each harmonic source at the CCP, a comprehensive evaluation method considering the user’s harmonic tolerance and grid loss is proposed. Through power flow calculation and correlation analysis, the influence degree of multi-harmonic sources on the common connection point is divided. Considering the degree of harmonic tolerance of general users on the user side and the network loss factors on the grid side, the multi-harmonic source access distribution network is comprehensively evaluated. Combined with the power flow calculation results and the harmonic compatibility level of the distribution network, a comprehensive evaluation index is formulated. This method can objectively evaluate the influence degree of the harmonic source on the distribution network, and has certain guiding significance for the location selection of the harmonic source access to the distribution network, the harmonic responsibility allocation of the multi-harmonic source access to the distribution network, and the subsequent harmonic control. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.
Keyword ：
Harmonic assessment Harmonic assessment Harmonic responsibility determination Harmonic responsibility determination Multi-harmonic source Multi-harmonic source
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| GB/T 7714 | Li, C. , Zheng, Z. . A Harmonic Impact Assessment Method for Multiple Harmonic Sources Connected to Distribution Network [未知]. |
| MLA | Li, C. 等. "A Harmonic Impact Assessment Method for Multiple Harmonic Sources Connected to Distribution Network" [未知]. |
| APA | Li, C. , Zheng, Z. . A Harmonic Impact Assessment Method for Multiple Harmonic Sources Connected to Distribution Network [未知]. |
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This paper proposes an optimal output synchronization control method for heterogeneous multi -agent systems (HMASs) under a performance -dependent switching topology and DoS attacks. First, local and global switched performance index functions (SPIF) and SPIF-dependent topology switching law are proposed, respectively, thus, the control performance and topology quality can be quantitatively expressed. Second, an adaptive dynamic programming (ADP) algorithm with mode switching is proposed, aimed at dealing with the difficult Hamilton-Jacobi- Bellman equation, as well as the analytical complexity caused by the switching dynamics. The convergence of the switched ADP algorithm is proven to ensure its correct implementation. Then, for different topologies, multi -mode Actor-Critic neural networks (NNs) are built for each agent to calculate optimized control policies and SPIF, respectively. Furthermore, an NNbased state compensation mechanism is designed to expand the applicability of the designed switched ADP algorithm when the leader's output transmission is unreliable. Finally, the results of numerical examples confirm that the proposed method is feasible.
Keyword ：
DoS attacks DoS attacks Heterogeneous multi-agent systems Heterogeneous multi-agent systems Switched adaptive dynamic programming Switched adaptive dynamic programming Switching topology Switching topology
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| GB/T 7714 | Qi, Yiwen , Wang, Yunlong , Geng, Honglin et al. Optimal synchronization for multi-agent systems: A performance-dependent switching topology [J]. | JOURNAL OF THE FRANKLIN INSTITUTE-ENGINEERING AND APPLIED MATHEMATICS , 2024 , 361 (6) . |
| MLA | Qi, Yiwen et al. "Optimal synchronization for multi-agent systems: A performance-dependent switching topology" . | JOURNAL OF THE FRANKLIN INSTITUTE-ENGINEERING AND APPLIED MATHEMATICS 361 . 6 (2024) . |
| APA | Qi, Yiwen , Wang, Yunlong , Geng, Honglin , Xing, Ning , Zheng, Zonghua , Li, He . Optimal synchronization for multi-agent systems: A performance-dependent switching topology . | JOURNAL OF THE FRANKLIN INSTITUTE-ENGINEERING AND APPLIED MATHEMATICS , 2024 , 361 (6) . |
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In electric vehicle wireless power transfer (EVWPT) systems, unipolar, bipolar, and multipolar coils produced by different manufacturers are not well compatible with each other, resulting in the interoperability issues. In order to solve this contradiction, a family of self-adaptive interoperable receivers based on multiple decoupled receiving poles is proposed. Based on the two decoupled poles as the receiving coil, the proposed self-adaptive two-pole interoperable receiver can tolerate both the unipolar (UP) transmitting coil and the bipolar (BP) transmitting coil along one direction. On this basis, it is extended to a self-adaptive four-pole interoperable receiver. The four poles are coplanar and decoupled by using four externally decoupling windings. This self-adaptive four-pole receiver can tolerate the UP transmitting coil, the BP transmitting coil along two directions, and the quadrupole (QP) transmitting coil by forming effective equivalent mutual inductances with them, thus achieving interoperability. Moreover, misalignment tolerance is also realized. The experimental results of the two-pole and four-pole proposals show that efficient power transmission can be achieved with various transmitting coil including the UP, BP, and QP transmitting coils, realizing interoperability and misalignment tolerance. IEEE
Keyword ：
bipolar bipolar Coils Coils Couplers Couplers Electric vehicle (EV) Electric vehicle (EV) interoperability interoperability Interoperability Interoperability Magnetic flux Magnetic flux quadrupolar quadrupolar Receivers Receivers self-adaptive multipole receivers self-adaptive multipole receivers Topology Topology unipolar unipolar Voltage Voltage wireless power transfer (WPT) wireless power transfer (WPT)
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| GB/T 7714 | Zhang, Y. , Zhou, H. , Shen, Z. et al. A family of Self-Adaptive Interoperable Receivers Based on Multiple Decoupled Receiving Poles for Electric Vehicle Wireless Charging Systems [J]. | IEEE Transactions on Power Electronics , 2024 , 39 (9) : 1-9 . |
| MLA | Zhang, Y. et al. "A family of Self-Adaptive Interoperable Receivers Based on Multiple Decoupled Receiving Poles for Electric Vehicle Wireless Charging Systems" . | IEEE Transactions on Power Electronics 39 . 9 (2024) : 1-9 . |
| APA | Zhang, Y. , Zhou, H. , Shen, Z. , Xie, R. , Zheng, Z. , Chen, X. . A family of Self-Adaptive Interoperable Receivers Based on Multiple Decoupled Receiving Poles for Electric Vehicle Wireless Charging Systems . | IEEE Transactions on Power Electronics , 2024 , 39 (9) , 1-9 . |
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为了提高播种机的定位导航效率及导航自动化水平,将大数据处理技术和无线传感网络技术引入到了导航系统的设计上,并通过定位算法对位置信息进行估计,实现了播种机的自动定位导航。模拟农田作业的环境,在700m×1000m的网格区域范围内布置了传感器节点,并利用仿真计算的方式对导航的精度进行了测试。测试结果表明:采用三边测量法,结合PID控制器可以有效提高定位精度,可对自动导航系统的设计提供较有价值的借鉴。
Keyword ：
三边测量 三边测量 农用无人机 农用无人机 大数据技术 大数据技术 自主导航 自主导航 自动定位 自动定位
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| GB/T 7714 | 付锐 , 郑宗华 . 基于大数据技术的播种机无线自动导航定位系统研究 [J]. | 农机化研究 , 2023 , 45 (01) : 239-242,249 . |
| MLA | 付锐 et al. "基于大数据技术的播种机无线自动导航定位系统研究" . | 农机化研究 45 . 01 (2023) : 239-242,249 . |
| APA | 付锐 , 郑宗华 . 基于大数据技术的播种机无线自动导航定位系统研究 . | 农机化研究 , 2023 , 45 (01) , 239-242,249 . |
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传统PID控制性能的不完善导致气压制动器的控制效果失谐，为提升制动器整体控制精度，提出一种气压制动器优化控制方法。该方法对气压制动器影响因素开展了详细分析，从中获取影响气压制动器致动能力失谐的原因；在此基础上，通过建立的电路模型取得气压制动器应变测量电路，并依据相位同步控制策略构建增量式PID控制器，利用控制器主动控制制动器，提升气压制动器致动能力，实现气压制动器优化控制。实验结果表明，通过对该方法开展负载性能测试及动态响应测试，其制动器母线电路波形基本为正弦波，并且动态响应反馈曲线与指令的波峰及波谷相同，验证了该方法的有效性强、可靠性高。
Keyword ：
PID控制器 PID控制器 优化控制 优化控制 增量式PID控制器 增量式PID控制器 气压制动器 气压制动器 相位同步控制 相位同步控制
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| GB/T 7714 | 付锐 , 郑宗华 . 基于相位同步增量式PID的气压制动器优化控制方法 [J]. | 机械设计与研究 , 2023 , 39 (03) : 206-209 . |
| MLA | 付锐 et al. "基于相位同步增量式PID的气压制动器优化控制方法" . | 机械设计与研究 39 . 03 (2023) : 206-209 . |
| APA | 付锐 , 郑宗华 . 基于相位同步增量式PID的气压制动器优化控制方法 . | 机械设计与研究 , 2023 , 39 (03) , 206-209 . |
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As a complex dynamically strongly coupled system, DC distribution system often suffers from voltage collapse due to system resonance. In order to suppress distribution network resonance and bus voltage fluctuation, this paper proposes a hybrid control algorithm to suppress DC distribution system resonance to further enhance DC system stability. In this paper, the output voltage of the line regulation converter (LRC) is the target of the study. A current prediction model is introduced in the inner loop of the converter control, which can enhance the dynamic responsiveness of the system and eliminate the PWM modulator and parameter tuning, achieve the unitization of the inner loop of the current. By constructing the inverse model of the controlled object, the outer voltage loop is unitized under the control of two-degree-of-freedom. The hybrid control enables the bus voltage to follow the reference voltage exactly, which suppresses resonance peaks in the voltage transfer function and reduces bus voltage fluctuations. Finally, the proposed hybrid control algorithm is simulated and verified in MATLAB/Simulink platform. The results show that the control strategy can effectively suppress the resonance and bus voltage fluctuation of the DC distribution system and enhance the dynamic characteristics and anti-interference capability of the distribution network.
Keyword ：
DC distribution system DC distribution system hybrid control algorithm hybrid control algorithm model predictive control model predictive control resonance suppression resonance suppression stability analysis stability analysis
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| GB/T 7714 | Zheng, Zonghua , Wu, Xudong , Zheng, Feng et al. Resonance suppression strategy of DC distribution system based on reduced-order hybrid control algorithm [J]. | FRONTIERS IN ENERGY RESEARCH , 2023 , 11 . |
| MLA | Zheng, Zonghua et al. "Resonance suppression strategy of DC distribution system based on reduced-order hybrid control algorithm" . | FRONTIERS IN ENERGY RESEARCH 11 (2023) . |
| APA | Zheng, Zonghua , Wu, Xudong , Zheng, Feng , Liu, Baojin , Liang, Ning . Resonance suppression strategy of DC distribution system based on reduced-order hybrid control algorithm . | FRONTIERS IN ENERGY RESEARCH , 2023 , 11 . |
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The method of using distribution transformer monitoring data for condition diagnosis of reactive power compensation devices is proposed, introducing a clustering algorithm based on u-shapelets feature extraction of time series data, and then defining the health degree to realize the diagnostic assessment of the operation condition of distribution transformer reactive power compensation using distribution transformer monitoring data without installing additional monitoring equipment. © 2023 IEEE.
Keyword ：
Clustering algorithms Clustering algorithms Condition monitoring Condition monitoring Electric power distribution Electric power distribution Electric power utilization Electric power utilization Electric transformers Electric transformers Machine learning Machine learning Reactive power Reactive power Time series Time series
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| GB/T 7714 | Chen, Yuhao , Zheng, Zonghua . A Time-series Clustering-based Method for Assessing the Condition of Reactive Power Compensation Equipment in Distribution Transformers [C] . 2023 : 61-64 . |
| MLA | Chen, Yuhao et al. "A Time-series Clustering-based Method for Assessing the Condition of Reactive Power Compensation Equipment in Distribution Transformers" . (2023) : 61-64 . |
| APA | Chen, Yuhao , Zheng, Zonghua . A Time-series Clustering-based Method for Assessing the Condition of Reactive Power Compensation Equipment in Distribution Transformers . (2023) : 61-64 . |
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抗偏移性是无线电能传输(WPT)系统需要攻克的重要内容之一,关系着WPT技术的用户体验.针对如何提高系统的抗偏移性,本文首先设计一种新型线圈结构,并对该新型线圈结构进行建模与电路理论分析.其次,通过Maxwell对双发射线圈WPT系统的收、发线圈偏移变化情况进行仿真,得出由于收发线圈间的互感在整个偏移过程中基本保持恒定,使得该系统的输出功率、效率保持稳定.此外,从Maxwell中导出WPT文件,搭建Simplorer和Maxwell的联合仿真电路,得到了横向偏移过程中的电流、电压等参数,绘制功率和效率曲线并进行分析;最后搭建了实验装置,使用网络分析仪对双发射线圈系统进行S参数测量,验证了仿真的准确性和线圈结构的有效性.
Keyword ：
S参数 S参数 互感 互感 抗偏移性 抗偏移性 无线电能传输 无线电能传输
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| GB/T 7714 | 易新红 , 郑宗华 . 磁耦合无线电能传输系统横向抗偏移性研究 [J]. | 电气开关 , 2023 , 61 (6) : 7-12 . |
| MLA | 易新红 et al. "磁耦合无线电能传输系统横向抗偏移性研究" . | 电气开关 61 . 6 (2023) : 7-12 . |
| APA | 易新红 , 郑宗华 . 磁耦合无线电能传输系统横向抗偏移性研究 . | 电气开关 , 2023 , 61 (6) , 7-12 . |
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This paper introduces a novel type of coupling coil structure that can be used for wireless charging of consumer electronics. The coupling loop configuration includes an eight-shaped transceiver coil and dual rectangular coils integrated on the printed circuit board (PCB). Moreover, when numerous transmitting coils of this structure are staged in parallel, it can sustain a consistent mutual inductance even when the receiver coil is not aligned, which can efficiently stabilize output power during charging. The article first models three different coil structures based on circuit theory and simulates their electromagnetic fields in commercial software and then performs a comparison among the three types of coils. Finally, it verifies the anti-offset capability of the modified structure through a 25 W wireless power transmission experimental platform. The experimental outcomes are in accordance with the simulation and theoretical analysis, and compared with traditional dual-transmitting coil structures, better overall power transmission efficiency has been achieved. This paper presents an innovative coupling coil structure designed for wireless charging consumer electronics. It showcases an eight-shaped transceiver coil in combination with dual rectangular coils integrated onto a printed circuit board (PCB). When multiple coils of this kind are arranged in parallel, they consistently maintain mutual inductance, ensuring a stable power output even in the case of misalignment of the receiver coil. By examining the results of modeling, simulations, and experiments, the performance of the proposed structure in terms of anti-offset capability is compared with traditional designs.image
Keyword ：
anti-offset anti-offset coupling coil structure coupling coil structure PCB coils PCB coils power transfer efficiency power transfer efficiency wireless charging wireless charging
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| GB/T 7714 | Zheng, Zonghua , Fang, Xin , Zhang, Yiming . Design and analysis of a coupling coil structure for high-efficiency wireless charging system for consumer electronics [J]. | INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS , 2023 , 52 (6) : 2622-2634 . |
| MLA | Zheng, Zonghua et al. "Design and analysis of a coupling coil structure for high-efficiency wireless charging system for consumer electronics" . | INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS 52 . 6 (2023) : 2622-2634 . |
| APA | Zheng, Zonghua , Fang, Xin , Zhang, Yiming . Design and analysis of a coupling coil structure for high-efficiency wireless charging system for consumer electronics . | INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS , 2023 , 52 (6) , 2622-2634 . |
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Maintaining accurate and fast transient stability is essential for safe operation of the power system. With the development of wide-area measurement system, machine learning-based transient stability assessment has become the trend. However, in realistic application of the power system, the impacts on evaluation rules between critical samples and noncritical samples are different. Thus, an improved cost-sensitive coefficient assignment method based on fault severity is proposed. First, the fault severity of each unstable sample is calculated. Then, the correction coefficient of the loss function of the unstable sample is linearized according to different fault severities. The closer the sample is to the critical case, the higher the cost coefficient is. Finally, the improved cost-sensitive method is combined with the deep learning model and tested in the IEEE-39 bus system. As shown in the results, the improved cost-sensitive method, which gives different correction coefficients to samples according to different fault severities, has better performance.
Keyword ：
cost-sensitive method cost-sensitive method deep belief network deep belief network deep learning deep learning fault severity fault severity transient stability assessment transient stability assessment
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| GB/T 7714 | Lin, Jianxin , Cai, Rongbin , Zheng, Zonghua . A Transient Stability Assessment Model Based on Fault Severity Assignment [J]. | FRONTIERS IN ENERGY RESEARCH , 2022 , 10 . |
| MLA | Lin, Jianxin et al. "A Transient Stability Assessment Model Based on Fault Severity Assignment" . | FRONTIERS IN ENERGY RESEARCH 10 (2022) . |
| APA | Lin, Jianxin , Cai, Rongbin , Zheng, Zonghua . A Transient Stability Assessment Model Based on Fault Severity Assignment . | FRONTIERS IN ENERGY RESEARCH , 2022 , 10 . |
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