Results 11 to 20 of about 3,914 (176)
Research on the Design of Operating Condition of Multi-Resistance Superconducting DC Current Limiter [PDF]
, 2023 [Introduction] The working principle of the resistive superconducting current limiter is based on the zero resistance effect of the superconductor, which is connected in series in the line and basically has no resistance during normal operation. When the
Jinchuan GUO, Qin YIN
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柔性直流并入城市电网后对换流站近区短路电流的影响研究 [PDF]
, 2023 大型城市供电电网短路电流已经接近断路器遮断容量，柔性直流接入系统后，会在故障期间提供工作电流，导致交流系统短路电流超标，柔性直流输送功率受限。从柔性直流内外环控制方式及交流系统短路电流计算原理出发，分析得出柔性直流短路电流的幅值和相位对并网点的短路电流影响均较大，其中幅值受外环电流限幅环节的影响易于控制，因此需着重对相位进行控制。基于此提出了一种降低柔性直流输电换流站两端PCC点短路电流的控制策略。以厦门柔性直流工程为例，开发了交直流混合模型，与实测波形对比验证了模型的正确性。通过对不同类型故障下 ...
寇龙泽, 朱琳, 范征, 谷怀广
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Research on Lightning Performance and Protective Measures of ±800 kV UHVDC Power Transmission Line [PDF]
, 2023 [Introduction] Lightning strike is the primary cause of failures of ±800 kV UHVDC power transmission lines, and the lightning protection assessment of power transmission lines is critical to the safe and stable operation of the system.
Youjun GONG, Zhiwen HE, Ziwei YAN
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, 2023 针对中国第一个海上风电柔性直流送出工程—江苏如东工程，从系统拓扑方案构建、过电压与绝缘配合、系统功率盈余问题与交流故障穿越技术以及控制保护技术等方面开展了深入研究，构建了轻型紧凑化的海上风电柔性直流系统拓扑方案，取消了海上换流站的启动回路与接地回路等；提出了海陆换流站的避雷器配置方案与参考电压的选取原则，形成了海陆换流站的绝缘配合方案的典型范式；提出了集中式、分布式、混合式直流侧有功功率动态平衡装置的典型拓扑方式，解决了陆上换流站交流侧故障穿越难题；提出了工程的整体控制保护方案 ...
卢亚军 +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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适应城市电网的多端柔性直流输电可行性分析及仿真研究 [PDF]
全球能源互联网, 2019 城市电网规模庞大复杂且核心城区负荷密度急剧攀升，为提升城市电网电力输送能力，基于城市电网中长期负荷增长模式与预测技术，从电压等级选择、城市电网供电方式分析及交直流输电方式比较等综合分析城市电网多端柔性直流输电的可行性。通过比较多端柔性直流输电与传统交流输电在城市电网供电应用上的利弊，提出适应于城市电网的交直流协调控制策略，研究多端柔性直流输电系统的优化运行。最后以南京电网为例，进行南京电网交直流混合系统建模和多端柔性直流输电仿真，研究多端柔性直流输电与城市电网的交互影响 ...
马洲俊 +4 more
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全球能源互联网, 2020 首先简要概述英国交直流输电网的发展现状，然后从交流和直流规划两方面阐述了其理念和方法。交流电网规划方面包括未来电力能源情景的选择和制定、电网模型的建立、未来电网需求分析、电网规划技术性和经济性分析等，直流输电系统规划方面包括直流输电系统对交流输电网潮流阻塞成本的影响、直流输电规划的参考成本以及直流输电系统的经济性分析等，并分别给出了实践案例。最后结合英国电网规划的理念和方法，提出了其对中国电网规划的借鉴意义，以为中国未来电网规划工作提供对比和参考。
朱介北 +4 more
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Research on the Interaction Between Multi-Circuit Shared HVDC Grounding Electrodes [PDF]
, 2023 [Introduction] Unlike the independent grounding electrode, shared earth electrode is connected to multiple DC (Direct Current) systems, and its parameters and operation mode need to be determined by each system connected to it.
Wen WANG, Yu LIU
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LCC-HVDC Converter Station Reactive Power Optimization and Two-Layer Coordination Strategy Research Based on Synchronous Sondenser [PDF]
, 2023 [Introduction] Under the existing converter station reactive power compensation scheme, the synchronous condenser only provides transient reactive power support, and the AC (Alternating Current) filter undertakes steady-state reactive power compensation ...
Dongqing ZHANG +3 more
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Research on Construction Mode of Large-Scale Offshore Wind Power Centralized Transmission [PDF]
, 2023 [Introduction] Offshore wind power has become a research hotspot in the development of global wind power. China's offshore wind power is still in its infancy, the current operation mode is not conducive to the large-scale centralized transmission of ...
Ni LI +3 more
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