Method and application of carbon emission calculation for ultra-high voltage (UHV) project construction [PDF]
, 2023 [Objective] As one of the seven key areas of “new infrastructure” development during China’s 14th Five-Year Plan period, the ultra-high voltage (UHV) projects are the backbone of China’s new power system and is of great significance to the transmission ...
CHEN Xiaohong, FU Yipeng, HUANG Chengdong, WANG Yangjie
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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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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 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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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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, 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 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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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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Collaborative Control Method for Offshore Wind Farms with Friendly Access to Hydrogen Energy Systems During Typhoons [PDF]
, 2023 [Introduction] With the steady progress of the carbon peaking and carbon neutrality goals, more and more distributed renewable energy is connected to the power grid.
Enyan XIE +4 more
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, 2023 为提升远海风电对称双极柔性直流送端交流系统单相接地故障和两相短路故障工况（第一类故障）下的功率输送能力，以及三相接地故障工况（第二类故障）的交流电压稳定性，提出海上换流站协调控制策略。首先分析了第一类故障的过电压和极间环流产生机理，以及第二类故障的交流电压失稳机理。在此基础上，提出了功率平衡控制策略和输出有功电流策略。第一类故障下定电压控制极采用限压策略，功率平衡控制策略抑制极间环流，增大定电压控制极的功率，减少了交流电压控制器响应时间，提升了功率输送能力。第二类故障工况下 ...
叶荣 +4 more
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