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学者姓名：许志红
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Abstract ：
Addressing the issue of electrical fires caused by DC series arc fault in long-serving photovoltaic systems due to line aging and poor contact, this paper proposes a fault detection method that combines multi-feature fusion fault criteria with machine learning algorithms. Initially, an arc generator is designed and integrated into the photovoltaic system to produce DC arc fault waveforms, with arc data collected using sensors and oscilloscopes. Subsequently, arc features are extracted from various domains and feature selection is performed using the random forest algorithm to eliminate redundant features, forming feature criteria. Finally, arc fault detection is carried out using a support vector machine optimized by particle swarm optimization. Experimental results show that this method can accurately identify DC series arc fault in photovoltaic systems and has a certain degree of anti-interference capability. © Beijing Paike Culture Commu. Co., Ltd. 2025.
Keyword ：
Adaptive boosting Adaptive boosting Decision trees Decision trees Feature Selection Feature Selection Particle swarm optimization (PSO) Particle swarm optimization (PSO) Random forests Random forests Support vector machines Support vector machines
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| GB/T 7714 | Cao, Feng , Xu, Zhihong . PSO-SVM Based DC Series Arc Fault Detection Method in Photovoltaic Systems [C] . 2025 : 697-705 . |
| MLA | Cao, Feng 等. "PSO-SVM Based DC Series Arc Fault Detection Method in Photovoltaic Systems" . (2025) : 697-705 . |
| APA | Cao, Feng , Xu, Zhihong . PSO-SVM Based DC Series Arc Fault Detection Method in Photovoltaic Systems . (2025) : 697-705 . |
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Aiming at the problem of arc extinguishing of HVDC relay, this paper presents an optimal design of electromagnetic system based on orthogonal test. In order to improve the breaking speed of the contact, a three-dimensional finite element model of the relay electromagnetic system is established. The key parameters of the electromagnetic system performance are analyzed, the optimization variables are determined, and the simulation model is verified by dynamic characteristic experiment. On this basis, the orthogonal test method is used to optimize the electromagnetic system of relay. The results show that the optimal design can improve the breaking speed of the relay contact and lay a theoretical foundation for improving the life of the relay. © Beijing Paike Culture Commu. Co., Ltd. 2025.
Keyword ：
Design of experiments Design of experiments HVDC power transmission HVDC power transmission
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| GB/T 7714 | Zhou, Yuxing , Xu, Zhihong . Optimization Design of Electromagnetic System for HVDC Relays Based on Orthogonal Experiment [C] . 2025 : 738-746 . |
| MLA | Zhou, Yuxing 等. "Optimization Design of Electromagnetic System for HVDC Relays Based on Orthogonal Experiment" . (2025) : 738-746 . |
| APA | Zhou, Yuxing , Xu, Zhihong . Optimization Design of Electromagnetic System for HVDC Relays Based on Orthogonal Experiment . (2025) : 738-746 . |
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Abstract ：
During the operation of the electromagnetic switches, the flux linkage can replace the mechanical parameters to characterize the motion of the actuator. But the observation errors of the flux linkage will lead to a failure of the control strategy. To address this issue, a cascade control strategy based on flux linkage slope is proposed. The observed flux linkage is intercepted by a sliding window, the flux linkage slope is calculated, then the flux linkage slope is used to establish a cascade control strategy. This strategy consists of an outer loop of the flux linkage slope and an inner loop of the coil current. The theoretical deduction proves that the flux linkage slope can be compatible with the flux linkage observation error and reflect the change of the real flux linkage caused by the motion of the armature. The simulation results show that the proposed cascade control strategy has good compatibility with the flux linkage observation error while realizing the self-adjusting of coil current with the displacement of the armature. © Beijing Paike Culture Commu. Co., Ltd. 2025.
Keyword ：
Actuators Actuators Cascade control systems Cascade control systems Electric switches Electric switches
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| GB/T 7714 | Zhang, Changkun , Su, Peiming , Xu, Zhihong . A Cascade Control Strategy for Electromagnetic Switches Based on Flux Linkage Slope [C] . 2025 : 594-601 . |
| MLA | Zhang, Changkun 等. "A Cascade Control Strategy for Electromagnetic Switches Based on Flux Linkage Slope" . (2025) : 594-601 . |
| APA | Zhang, Changkun , Su, Peiming , Xu, Zhihong . A Cascade Control Strategy for Electromagnetic Switches Based on Flux Linkage Slope . (2025) : 594-601 . |
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Abstract ：
The actuator drivers are rarely transplanted among different contactors because the self-tuning of excitation control parameters either takes a long time or is relevant to many contactor structural parameters. An adaptive actuator driver for ac contactors is proposed based on the coil impedance estimation and mathematical equations between the coil impedance and excitation control parameters. The coil impedance estimation and its error correction are established through the voltage balance equation when the contactor is in the open position. The coil inductance estimation is established through the zero-state response equation when the contactor is in the closed position. The mathematical equations are established based on the equivalence of the electromagnetic force under different excitation methods, the power consumption model, and the control system's transfer function. A geometric feature of the flux linkage waveform is established to identify whether a contactor is in the closed position and realize the self-transition of the driver's working state. Then, self-tuning regulators for the excitation control parameters are realized. This driver has a plug-and-play function for ac contactors and can reduce the contactor's power consumption. This driver may be prospectively reduced to a chip.
Keyword ：
Actuator Actuator contactor contactor estimation estimation self-tuning regulator self-tuning regulator
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| GB/T 7714 | Zhang, Changkun , Xu, Zhihong . An Adaptive Actuator Driver for AC Contactors [J]. | IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS , 2024 , 71 (4) : 3904-3914 . |
| MLA | Zhang, Changkun 等. "An Adaptive Actuator Driver for AC Contactors" . | IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS 71 . 4 (2024) : 3904-3914 . |
| APA | Zhang, Changkun , Xu, Zhihong . An Adaptive Actuator Driver for AC Contactors . | IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS , 2024 , 71 (4) , 3904-3914 . |
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This paper designs an intelligent control module with STM32F103 microcontroller as the core, aiming at the 400A unipolar electromagnetic switch developed by our research team. This module has realized the joint optimization of bounce suppression of the closing process, adaptive adjustment of closing time, collaborative optimization of the holding process reliability and energy-saving operation. Firstly, the step control strategy is adopted to effectively shorten the contact bounce time. Secondly, the dynamic iron displacement observer is constructed to successfully realize the adaptive switching of closing and holding processes. In addition, a collaborative optimization strategy based on the change of current slope is proposed for the characteristic difference of different reaction spring. This strategy optimizes the electromagnetic suction force by automatically adjusting the holding current, realizing reliable and energy-saving operation. Experimental verification confirms the effectiveness of bounce suppression and collaborative optimization strategies.
Keyword ：
adaptive stage switching adaptive stage switching collaborative optimization collaborative optimization contact bounce suppression contact bounce suppression intelligent electromagnetic switch intelligent electromagnetic switch
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| GB/T 7714 | Huang, Jinru , Xu, Zhihong , Chen, Qitao . The Intelligent Electromagnetic Switch Bounce Suppression and Holding Process Collaborative Optimization Control Strategy [J]. | 2024 IEEE 19TH CONFERENCE ON INDUSTRIAL ELECTRONICS AND APPLICATIONS, ICIEA 2024 , 2024 . |
| MLA | Huang, Jinru 等. "The Intelligent Electromagnetic Switch Bounce Suppression and Holding Process Collaborative Optimization Control Strategy" . | 2024 IEEE 19TH CONFERENCE ON INDUSTRIAL ELECTRONICS AND APPLICATIONS, ICIEA 2024 (2024) . |
| APA | Huang, Jinru , Xu, Zhihong , Chen, Qitao . The Intelligent Electromagnetic Switch Bounce Suppression and Holding Process Collaborative Optimization Control Strategy . | 2024 IEEE 19TH CONFERENCE ON INDUSTRIAL ELECTRONICS AND APPLICATIONS, ICIEA 2024 , 2024 . |
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The arc extinguishing system is the main component of the micro circuit breaker, and the structural parameters such as the arc extinguishing grid, the size of the outlet hole, and the contact angle affect the breaking capacity of the micro circuit breaker. In this paper, an arc simulation model is built based on magnetohydrodynamics. On this basis, the transient process of short-circuit current is taken into account to improve the accuracy of the simulation model, and the validity of the model is verified by experiments. Based on the simulation model, the influence of arc extinguishing grid and outlet hole size on the arc extinguishing ability of micro circuit breaker is analyzed by arc shape and external characteristics. The results show that increasing the arc extinguishing grid will make it difficult for the arc to enter the grid, but at the same time, it can increase the arc voltage and promote the extinction of the arc. In terms of the outlet hole, the uneven distribution of the arc when the outlet hole size is 2 mm and 4 mm will cause the arc to blow out from the grid, and the phenomenon of the arc blowing out from the grid can be effectively avoided when the outlet hole size is 3 mm. © Beijing Paike Culture Commu. Co., Ltd. 2024.
Keyword ：
Circuit simulation Circuit simulation Contact angle Contact angle Electric circuit breakers Electric circuit breakers Magnetohydrodynamics Magnetohydrodynamics Timing circuits Timing circuits
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| GB/T 7714 | Li, Xiaodong , Liu, Xiangjun , Xu, Zhihong . Simulation and Research on Short Circuit Breaking Arc Characteristics of Micro Circuit Breaker [C] . 2024 : 32-40 . |
| MLA | Li, Xiaodong 等. "Simulation and Research on Short Circuit Breaking Arc Characteristics of Micro Circuit Breaker" . (2024) : 32-40 . |
| APA | Li, Xiaodong , Liu, Xiangjun , Xu, Zhihong . Simulation and Research on Short Circuit Breaking Arc Characteristics of Micro Circuit Breaker . (2024) : 32-40 . |
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Abstract ：
The basis of intelligent control of contactor is mostly realized by DC control and high-frequency PWM control. In order to further optimize the control algorithm for problems such as bounce and contact arc, parameter identification of electromagnetic mechanism is essential, and parameter mismatch directly affects the control accuracy of the algorithm. Based on the control rate accelerator CLA (Control Law Accelerator) module of digital signal processor DSP chip TMS320F28069, the parameters of electromagnetic mechanism controlled by intelligent closed-loop control algorithm of contactor are identified in real time, which greatly reduces the calculation burden of the chip under high frequency control. The identification results are output through SPI protocol and DAC module, which verifies the effectiveness of the parameter identification system. © 2024 IEEE.
Keyword ：
Control theory Control theory Digital signal processing Digital signal processing Digital signal processors Digital signal processors Parameter estimation Parameter estimation Pulse width modulation Pulse width modulation
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| GB/T 7714 | Xu, Qing , Zhuang, Jierong , Xu, Zhihong . Parameter Identification Design of Intelligent Contactor Based on DSP-Control Law Accelerator [C] . 2024 : 1930-1934 . |
| MLA | Xu, Qing 等. "Parameter Identification Design of Intelligent Contactor Based on DSP-Control Law Accelerator" . (2024) : 1930-1934 . |
| APA | Xu, Qing , Zhuang, Jierong , Xu, Zhihong . Parameter Identification Design of Intelligent Contactor Based on DSP-Control Law Accelerator . (2024) : 1930-1934 . |
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In order to solve the problem of low efficiency of traditional intelligent contactor performance test, this paper proposes a contactor dynamic characteristic test and analysis system based on NI CompactRIO, which is convenient for measuring the performance index of intelligent contactor. The system includes a Human-Machine-Interaction(HMI) interface, which can control the action of the contactor to be detected and collect signals in the host computer platform. According to the trend of the collected signal waveform, the performance indexes of the contactor, such as the closing/opening time, the closing/holding power, are calculated. The system also has the functions of cyclic switching test and automatic data storage, which greatly improves the automation level and efficiency of the test. It provides data support for the improvement and optimization of the control strategy of intelligent contactor. © Beijing Paike Culture Commu. Co., Ltd. 2024.
Keyword ：
Computer control systems Computer control systems Digital storage Digital storage Efficiency Efficiency
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| GB/T 7714 | Tian, Yaoming , Xu, Zhihong . A Testing System Design of Dynamic Characteristics of Contactor Based on CompactRIO [C] . 2024 : 823-830 . |
| MLA | Tian, Yaoming 等. "A Testing System Design of Dynamic Characteristics of Contactor Based on CompactRIO" . (2024) : 823-830 . |
| APA | Tian, Yaoming , Xu, Zhihong . A Testing System Design of Dynamic Characteristics of Contactor Based on CompactRIO . (2024) : 823-830 . |
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In order to improve the accuracy and efficiency of fault arc detection, this paper adopts the characteristic quantity of arc current wavelet decomposition coefficient to pre-judge arc signals, and adopts the wavelet Mallet algorithm to perform multi-scale decomposition of arc signals. The decomposed wavelet coefficient of arc current wave is taken as the characteristic quantity, and an adaptive threshold algorithm is proposed for detection. According to the results of the threshold detection algorithm, the current signal is selectively input into the residual neural network, which effectively improves the detection accuracy. Finally, the feasibility of detecting fault arc with residual neural network is verified, and its accuracy rate reaches 98.73%. © Beijing Paike Culture Commu. Co., Ltd. 2024.
Keyword ：
Fault detection Fault detection Signal processing Signal processing Wavelet decomposition Wavelet decomposition
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| GB/T 7714 | Lu, Yongjiang , Xu, Zhihong . Low Voltage Fault Arc Detection Method Based on Wavelet Threshold and Residual Neural Network [C] . 2024 : 753-762 . |
| MLA | Lu, Yongjiang 等. "Low Voltage Fault Arc Detection Method Based on Wavelet Threshold and Residual Neural Network" . (2024) : 753-762 . |
| APA | Lu, Yongjiang , Xu, Zhihong . Low Voltage Fault Arc Detection Method Based on Wavelet Threshold and Residual Neural Network . (2024) : 753-762 . |
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Abstract ：
Most of the existing fault arc circuit breaker is only for single circuit single load. Aiming at the problem of complex running load of low-voltage power lines, set up an experimental platform to collect the current signals of series fault arcs in main and branch lines under the conditions of single load operation and multi-load operation of typical household loads, to create a waveform database. Various time-frequency domain feature quantities are extracted, and a subset of the feature quantity data is constructed by random forest and input to a regularized limit learning machine (RELM) for fault arc detection, and the most appropriate input weights and implied layer thresholds of the RELM are optimally selected by a particle swarm optimization (PSO) to improve the accuracy of fault arc identification. The result shows that the PSO-RELM algorithm achieves an accuracy of 98.37% and can accurately identify fault arcs in multi-load situations. © Beijing Paike Culture Commu. Co., Ltd. 2024.
Keyword ：
Electric circuit breakers Electric circuit breakers Frequency domain analysis Frequency domain analysis Machine learning Machine learning Particle swarm optimization (PSO) Particle swarm optimization (PSO) Swarm intelligence Swarm intelligence
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| GB/T 7714 | Chen, Hongda , Xu, Zhihong . Multi-load Series Fault Arc Identification Based on PSO-RELM [C] . 2024 : 117-125 . |
| MLA | Chen, Hongda 等. "Multi-load Series Fault Arc Identification Based on PSO-RELM" . (2024) : 117-125 . |
| APA | Chen, Hongda , Xu, Zhihong . Multi-load Series Fault Arc Identification Based on PSO-RELM . (2024) : 117-125 . |
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