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WANG Yuwei，WANG Jing，WANG Yong，CHU Yunfei，LI Boqiang，LI Shuguang
Abstract：Aiming at the voltage fluctuation problem in the integrated electricity-gas system（IEGS）andconsidering the reactive power support capability of new energy units and coupling elements，a reactive power andvoltage optimization control method for the IEGS was proposed. First，based on the analysis of the compos...
更多Number of views：867 Amount of downloads：3052
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YANG Xiaoxia，ZENG Fei，MIAO Huiyu，YUAN Xiaodong，CAO Yuchen，QIN Jiasheng
Abstract：With the high proportion of distributed photovoltaic power generation connected to the power grid，the single-phase grid connection of distributed power generation has exacerbated the imbalance of the power grid.In addition，the number of DC electrical equipment is increasing in the industrial and constructi...
更多Number of views：844 Amount of downloads：2990
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ZHOU Jianhua，ZHANG Ruining，TAO Kai，XU Junjun
Abstract：The risk of voltage violations and fluctuations has surged due to the high penetration of distributedrenewable energy and the large-scale application of new power electronic devices. Therefore，it is essential tooptimize the control system of reactive voltage through intelligent methods for the reliability ...
更多Number of views：816 Amount of downloads：3191
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LÜ Zhenhua，LI Qiang，ZHANG Sen
Abstract：Grid-forming converter（GFC）can provide voltage and frequency support for the power grid，effectively improving the stability of power electronic power systems，but there is a risk of transient instabilityunder large disturbances. By studying the key factors affecting the transient stability of GFC and conduc...
更多Number of views：640 Amount of downloads：2856
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GAO Qiangwei，ZHUO Chengcheng，LIU Yichao，YUE Yang
Abstract：To accurately assess the power quality status of a system，a comprehensive power quality evaluationmethod based on a combined weighting approach and the normal cloud model was proposed. Initially，acomprehensive evaluation framework for power quality was established，encompassing three key dimensions：amplitud...
更多Number of views：636 Amount of downloads：2453
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ZHOU Weiyi，LOU Chengyu，WEI Dong，XU Yudong
Abstract：To optimize the performance of proton exchange membrane fuel cell（PEMFC）systems and enhancefuel utilization，a calculation model for fuel utilization based on internal resistance characteristics was established.The effects of operating conditions—specifically，operating temperature and humidity—on internal r...
更多Number of views：558 Amount of downloads：2748
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XIAO Lisha，CHENG Jiangzhou，BAO Gang，ZHU Changdong，ZHANG Bowen，WANG Xiao
Abstract：With the increasing complexity of distribution grids due to the integration of distributed powersources，an improved matrix acceleration state enumeration method was proposed to enhance the computationalefficiency and accuracy of reliability assessment when integrating distributed energy into distribution g...
更多Number of views：493 Amount of downloads：2654
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CHEN Wen，LI Pengcheng，ZHANG Hua，ZUO Zhengqin，HUANG Lilin
Abstract：Aiming at the problems of significant nonlinear metering error and low overshoot response ratefaced by electric vehicle charging equipment in complex environments，an out-of-tolerance metering dynamicmodeling method integrating the neural ordinary differential equations（ODE）and vehicle-pile-cloud synergy da...
更多Number of views：487 Amount of downloads：2333
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XIE Xiaofei，LE Jiangyuan，LI Fei
Abstract：The back electromotive force（EMF）increases with the speed of the motor，that is，the faster thespeed，the greater the back EMF，and when running at low speed，the traditional permanent magnet synchronousmotor（PMSM）has no position sensor control technology，and the signal-to-noise ratio of the useful signal is ver...
更多Number of views：1412 Amount of downloads：7511
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WANG Yiming，XU Po，YANG Ke，XIA Kun，WANG Jingxia
Abstract：A 2 kV photovoltaic grid-connected inverter system based on a five-level active neutral-pointclamped（ANPC-5L）topology was designed for high-power，high-voltage applications. This topology significantlyimproved the system efficiency and reliability by increasing the number of output levels and reducing the sw...
更多Number of views：1498 Amount of downloads：7314
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DING Jinjin，PENG Bo，ZHANG Feng，MAO Xun
Abstract：To address the large inrush current during the switching of a virtual synchronous generator（VSG）from off-grid to grid-connected，and the stability issues of traditional pre-synchronization schemes，a controlmethod for the phase-locked loop（PLL）pre-synchronization unit to be cut off in non-grid-connected time ...
更多Number of views：1285 Amount of downloads：6652
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ZHANG Sen，LÜ Zhenhua，LI Qiang
Abstract：After frequency disturbances occur in the external power grid，grid-forming converters（GFCs）areprone to synchronization instability. Analysis shows that adding a low-pass filter（LPF）to the active loop can causeconflicts between the transient stability and frequency stability of GFC，while adding LPF to the re...
更多Number of views：1388 Amount of downloads：6646
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TIAN Jiahui，QI Xiaoguang，ZHAO Kailin，XU Tianfeng，CHEN Yueqing，LI Linjing
Abstract：Junction temperature is a key indicator of the health status of SiC MOSFET，and real-timemonitoring of junction temperature is an important foundation for condition monitoring，health management andlifetime prediction. The real-time monitoring of junction temperature was investigated based on the on-resistanc...
更多Number of views：1598 Amount of downloads：7685
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LI Li，PANG Shengyang，ZHONG Ronghao，HUANG Qingdan，ZHANG Liping，ZHANG Yachao
Abstract：With the increase in electricity demand，the rising maintenance costs of substation projects have putpower grid companies under huge market pressure. Traditional cost methods cannot meet the needs of modernmarkets，so the construction of intelligent cost calculation models is the key to realize the modernizat...
更多Number of views：1328 Amount of downloads：5995
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SUN Xiangfei，LI Ping，DA Guangjun，DOU Xiaochang
Abstract：Due to the large rotational inertia of synchronous machines，frequency changes caused by faults areminimal. In contrast，new energy systems have smaller rotational inertia，which can result in more significantfrequency variations during faults. These larger frequency fluctuations inevitably lead to changes in ...
更多Number of views：1288 Amount of downloads：6934
