| 引用本文: | 赵 腾,张 焰,叶冠豪,张 璨,卫 茹,朱晨曦.多回特高压直流分层馈入模式下交直流混联系统的稳态特性分析[J].电力自动化设备,2016,36(8): |
| ZHAO Teng,ZHANG Yan,YE Guanhao,ZHANG Can,WEI Ru,ZHU Chenxi.Steady-state characteristics analysis for AC-DC hybrid systemin hierarchical-infeed mode of multi-loop UHVDC[J].Electric Power Automation Equipment,2016,36(8): |
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| 摘要: |
| 针对多回特高压直流单层接入特高压交流电网、单层接入超高压交流电网及分层接入特高压和超高压交流电网这3种模式，从多馈入短路比、交流系统稳态电压以及直流极限传输功率3个角度分析交直流混联系统的稳态特性，并提出基于自组织临界慢过程的直流极限传输功率分析方法。通过对两回特高压直流馈入的某区域电网进行仿真计算，验证分析方法的有效性。结果表明在一般情况下，采用分层馈入模式有助于提高系统的多馈入短路比，增强交流系统对特高压直流的电压支撑能力。 |
| 关键词: 特高压输电 直流输电 分层馈入 交直流混联系统 多馈入短路比 稳态电压 极限传输功率 自组织临界 |
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| Steady-state characteristics analysis for AC-DC hybrid systemin hierarchical-infeed mode of multi-loop UHVDC |
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ZHAO Teng1, ZHANG Yan1, YE Guanhao2, ZHANG Can2, WEI Ru2, ZHU Chenxi1
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1.School of Electronic Information and Electrical Engineering，Shanghai Jiao Tong University，Shanghai 200240，China;2.State Grid Nanjing Power Supply Company，Nanjing 210000，China
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| Abstract: |
| For three infeed modes of multi-loop UHVDC：simply into UHVAC，simply into EHVAC and hierarchically into UHVAC and EHVAC，the steady-state characteristics of AC-DC hybrid system are analyzed in three aspects：MISCR（Multi-Infeed Short Circuit Ratio），AC system steady-state voltage and UHVDC transmission power limit. A method of UHVDC transmission power limit analysis based on the self-organized critical slow process is proposed. The effectiveness of the proposed method is verified by simulating the feeding of a dual-loop UHVDC into AC grid and the results show that，the hierarchical infeed mode has better MISCR to enhance the voltage support capability of AC grid for UHVDC. |
| Key words: multi-infeed short circuit ratio steady-state voltage power transmission limit self-organized criticality |
