Results 1 to 10 of about 10,301 (150)
, 2023 特高压变压器发生内部故障时如压力不能及时泄放，极易造成油箱变形甚至爆裂，进而导致燃爆事件。分析了变压器常用的防爆保护装置及其优缺点，提出了一种基于爆破片的新型压力泄放装置，并通过真型燃爆试验和动态等效试验对爆破片型压力泄放装置的有效性进行了验证。试验结果表明：在变压器内部高燃爆能量电弧故障下，爆破片型压力泄放装置动作速度和泄放效率均优于压力释放阀 ...
卢理成, 董弘川
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New Generation High-Performance VSC-HVDC Back-to-Back Technology and Application in Project [PDF]
, 2023 [Introduction] Due to the dense load, complex grid structure, and close electrical connections in the Guangdong power grid area, there are three major problems for a long time: the risk of large-scale power outages, the interaction between AC and DC, and
Bo ZHU +5 more
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Characteristics Analysis and Technical Prospect of Low-Frequency Main Transformer for Offshore Wind Power [PDF]
, 2023 [Introduction] Low-frequency alternating current power transmission technology has attracted wide attention. Although its theoretical research continues to go deeper, there are still many problems to be solved before its engineering implementation in ...
Jutian LI +4 more
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适用于直流配电网故障选线的电力电子变压器分步闭锁方案 [PDF]
, 2023 级联H桥型电力电子变压器（power electronic transformer with cascaded H-bridge，CHB-PET）是柔性变电站的重要组成设备之一，在直流配电网中具有重要作用。当CHB-PET低压直流侧发生双极短路故障后，故障电流上升速度快且幅值较高，易导致电力电子器件迅速闭锁，使低压直流电网保护难以准确获取故障信息。针对CHB-PET低压侧多分支直流配电网，提出一种基于PET分步闭锁的故障穿越策略。当检测到PET低压侧直流系统故障后 ...
于弘洋 +5 more
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Research on Startup of DC Transformer for Electric Vehicle Cluster Grid-Connection [PDF]
, 2023 Modular multilevel direct current transformer (MMDCT) provides a feasible solution to realize the efficient and stable integration of electric vehicle charging and discharging cluster into urban DC distribution network.
FAN Weihao +6 more
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Research on Flexible Interconnection of Urban Power Grid [PDF]
, 2023 [Introduction] Due to its flexibility and rapid control ability, voltage source converter based high voltage direct current (VSC-HVDC) technology can be used in asynchronous grid interconnection, renewable energy grid-connection, and urban grid power ...
Jinchuan GUO +3 more
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Design and Implementation of Intelligent Monitoring System for Power Distribution Room [PDF]
, 2016 随着我国经济实力的不断增强，电力系统也取得了显著的成就。当前我国电网规模不断扩充。居民对于供电的可靠性与质量要求大幅提高。因此，如何确保提供经济安全、优质可靠的电力是我国电力系统在未来发展中面临的重要挑战之一。配电室作为电力系统中的重要组成元素，担负着电能的变压分流的重任，传统的配电室管理手段主要是依靠人工定时对电力仪表进行检查并形成报表，其工作效率低下，无法适应迅速发展的供电规模与居民的用电需求。如何利用信息技术与网络传输技术对配电室电力设备的运转状态进行远程实时监控，提高配电室管理的信息化水平 ...
姜维伟
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Research progress in Li-ion battery pack inconsistency control [PDF]
, 2017 总结电池均衡、成组方式和热管理的研究方法及问题。电池均衡技术主要有电池均衡电路、电池均衡控制策略；电池成组方式主要有电池串并联方式、电池连接阻抗；电池热管理主要有电池生热特性 ...
冯自平, 吕杰, 宋文吉, 罗卫
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Research and Application on Key Technologies of LED Lighting for Large Henhouse [PDF]
, 2016 摘要 人工照明技术可促进肉鸡生长以提高产量，使鸡舍照明技术在近年来发展迅速。具有环保、节能、高效和寿命长等优点的LED照明技术广泛应用于各个领域。本文基于某企业鸡舍照明设备改造项目，结合LED照明技术，为企业设计了一套稳定可靠的大型鸡舍LED照明系统。 本文介绍了鸡舍LED照明系统总体方案，阐述了系统布局及要求，利用距高比概念确定鸡舍光照分布和单盏灯光通量，确定照度控制方式，确立系统控制方法，确定各分区供电的开关电源设计标准。在总体方案基础上进行控制系统设计，为解决远距离信息传输设计通信信道 ...
王新峰
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Optimal design of a new step-down 18-pulse autotransformer [PDF]
, 2017 Aiming at the requirement for voltage regulation with a 18-pulse autotransformer-rectifier, a novel step-down 18-pulse topology was designed and optimized based on the advantage of present topologies.
GE Hong-juan +3 more
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