正常工作条件下融冰状态下特高压直流架空接地线的分段绝缘设计方法

IF 3.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Electric Power Systems Research Pub Date : 2024-10-16 DOI:10.1016/j.epsr.2024.111153

Peng Li , Dawei Zhang , Mengfei lei , Pan Xiao , Tian Wu , Chunhua Fang , Ziheng Pu

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引用次数: 0

摘要

受冰雪天气微气象条件影响，特高压直流输电线路架空地线结冰灾害时有发生，导致地线断开、杆塔倒塌等事故。为提高正常工况下架空地线的融冰效率，提出了一种新的融冰条件下地线分段方法，采用电磁暂态联合仿真。根据环境条件，通过调整融冰装置的脉冲触发角，自动计算出融冰所需的电压和容量，进而确定地线融冰段数，从而提出了地线分段融冰方案。同时，分析了冰厚和风速对融冰电压的影响，并通过实际±800 千伏输电线路验证了分段融冰方法的有效性。结果表明，所提出的方法可以根据环境条件自动确定融冰电压，与传统的经验公式法相比，准确性显著提高。冰层厚度对融冰电压影响很大。通过考虑实际环境条件、地线结冰条件和融冰装置参数，可实现架空地线分段绝缘的快速设计。

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Segmental insulation design method for UHV DC overhead ground wires under ice-melting with normal working condition

Icing disasters on overhead ground wires of ultra-high voltage direct current (UHV DC) transmission lines, influenced by micro-meteorological conditions in frozen snow weather, have occasionally resulted in accidents like ground wire disconnection and tower collapse. To improving the ice-melting efficiency of the overhead ground wires with normal working conditions, a new segmentation method for ground wires under ice-melting condition by adopting the electromagnetic transient joint simulation was proposed. Based on environmental conditions, the voltage and capacity required for ice-melting were automatically calculated by adjusting the pulse trigger angle of the ice-melting device, and then the number of ground wire ice-melting segments was determined, thus leading to the proposal of a ground wire segmentation ice melting scheme. Simultaneously, the impact of ice thickness and wind speed on the ice melting voltage was analyzed, and the effectiveness of the segmentation method was verified by the actual ±800 kV transmission line. The results show that the proposed method can automatically determine the ice-melting voltage based on environmental conditions, significantly improving accuracy over traditional empirical formula method. Ice thickness greatly affects the ice-melting voltage. By considering actual environmental conditions, ground wire icing conditions, and parameters of the ice-melting device, rapid design of segmented insulation for overhead ground wires can be achieved.

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来源期刊

Electric Power Systems Research 工程技术-工程：电子与电气

CiteScore

7.50

自引率

17.90%

发文量

963

审稿时长

3.8 months

期刊介绍： Electric Power Systems Research is an international medium for the publication of original papers concerned with the generation, transmission, distribution and utilization of electrical energy. The journal aims at presenting important results of work in this field, whether in the form of applied research, development of new procedures or components, orginal application of existing knowledge or new designapproaches. The scope of Electric Power Systems Research is broad, encompassing all aspects of electric power systems. The following list of topics is not intended to be exhaustive, but rather to indicate topics that fall within the journal purview. • Generation techniques ranging from advances in conventional electromechanical methods, through nuclear power generation, to renewable energy generation. • Transmission, spanning the broad area from UHV (ac and dc) to network operation and protection, line routing and design. • Substation work: equipment design, protection and control systems. • Distribution techniques, equipment development, and smart grids. • The utilization area from energy efficiency to distributed load levelling techniques. • Systems studies including control techniques, planning, optimization methods, stability, security assessment and insulation coordination.