Optimization Calculation Method of Injection Voltage and Series Converter Capacity for Unified Power Flow Controller [PDF]
, 2023 [Introduction] The application of UPFC (Unified Power Flow Controller) is to increase the transmission capacity of key sections, which mainly through the injection of a certain series voltage into the system and therefore divert the power flow of target ...
Jiefeng ZHONG +4 more
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Effect of Hydrogen Production System on Sub-Synchronous Oscillation Characteristics of Doubly Fed Induction Generator Systems With Series Compensation [PDF]
ObjectivesThe grid-connected operation of large-scale wind turbines increases the risks of sub-synchronous oscillation (SSO) in power systems, to address these issues, this study conducts an in-depth analysis of the effect of hydrogen production systems ...
LIU Zenan, LU Yanan, XU Tao
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Sub-Synchronous Oscillation Suppression Based on VSG Virtual Impedance Feasible Domains [PDF]
[Objective] The virtual synchronous generator (VSG) system exhibits negative damping characteristics under weak grid connection, which triggers subsynchronous oscillations and leads to system instability.
Qin SUN, Yi DU, Yuxin SUN
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Risk Prediction Method of Low Frequency Oscillation in Maintenance Power Network Based on Long Short Term Memory Neural Network [PDF]
With the expansion of power grid scale and the increase of power components, the maintenance methods of power system become more and more complex. It is difficult to evaluate the low-frequency oscillation risk of power grid under massive maintenance only
DU Xiaoyong +8 more
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Gaoya dianqi, 2023 温差发电（thermoelectric generation,TEG）系统作为一种清洁可再生的新能源发电装置，通过最大功率点跟踪（maximum power point tracking,MPPT）控制器连续跟踪输出功率的最大值极其重要。针对TEG系统侧存在功率振荡、功率跟踪速度慢、跟踪精度差等问题，文中在硬件电路上对比了不同DC-DC变换器的特点，选定能减缓功率振荡的二次型Boost电路作为MPPT的主电路。同时，在MPPT的算法策略上，文中提出一种基于优化初值的增量电导法（OI-INC），首先 ...
韩翔宇 +4 more
doaj
Dianci bileiqi, 2022 为了能够节约能源，提高生产效率，含变频器的异步电机系统受到广泛应用。但是高次谐波也随之产生，使得系统原有的参数模型受到影响，如传输线。针对以上问题，对传输线可能选取的等效参数模型进行SIMULINK仿真。通过参数扫描选取变化最为剧烈的系统参数。考虑雷击、两相短路、三相短路和堵转故障等常见的故障类型，比较不同传输线等效电路模型对电流波形和故障响应速度造成的影响。仿真结果表明，故障发生时，采用集总参数模型会出现上冲现象，而采用分布参数模型则会有复杂的振荡现象产生 ...
鞠晨 +4 more
doaj
Digital Simulation Research and System Software Design on TCSC Bases on Computer Control [PDF]
, 2005 可控串补（ThyristorControlledSeriesCapacitor,TCSC）是灵活交流输电系统（FlexibleACTransmissionSystem，FACTS）的重要组成部分。本论文对可控串联补偿装置（TCSC）进行了初步的理论分析和仿真研究，包括TCSC的基本结构、运行特性，TCSC动态过程数学建模和基波阻抗，TCSC装置基波阻抗与触发角关系的数值计算与Matlab仿真研究，TCSC人机界面软件平台程序的模块化结构设计思想以及其中的电压电流波形分析等 ...
张丹
core
Gaoya dianqi, 2021 10 kV配电系统中在串联补偿装置接入暂态过程中引起交流电动机自激较为普遍。对于带有串联补偿装置的线路,电动机定子电流和转子电流中均会出现基频50 Hz电流和低频电流,低频自激电流会产生负的电磁转矩抵消部分基频电流产生的转矩,使电动机的平均电磁转矩减小而低于额定转速,电动机无法正常应用,在系统中引起较大的电流振荡。文中使用PSCAD-EMTDC软件建立了两种典型的辐射式结构10 kV配网带异步电机及串补仿真模型,主要针对电机容量 ...
琚泽立 +5 more
doaj
An Advanced Fuzzy Control Strategy for Hybrid Energy Storage Systems Considering Smoothing of Wind Power Fluctuations at Future Moments [PDF]
ObjectivesThe existing hybrid energy storage system control strategy finds it difficult to maintain the state of charge (SOC) within a reasonable range while also meeting the advanced charging and discharging needs due to future wind power fluctuations ...
FAN Wei, LI Ji, YUAN Zhi, ZHOU Dan
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LCL Grid-Connected Inverters Control Strategy Based on Improved Fuzzy Linear Active Disturbance Rejection Control [PDF]
ObjectivesIn complex grid environments, traditional control methods for LCL grid-connected inverter systems suffer from poor grid current quality, inadequate dynamic performance, and inherent resonance peaks.
GUO Kunli +7 more
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