混合多馈入直流系统换相失败免疫水平快速评估方法

发布时间：2018-06-21 22:08

本文选题：混合多馈入直流输电系统 + 换相失败　；参考：《中国电机工程学报》2017年17期

【摘要】：针对目前混合多馈入直流输电系统(hybrid multiinfeed high voltage direct current,HMIDC)换相失败研究中采用仿真手段而导致计算量大的情况,提出了一种其换相失败免疫水平的快速评估方法。首先针对单馈入电网换相换流器高压直流输电(line commutated converter based high voltage direct current,LCC-HVDC)系统,提出了计及直流系统一、二次参数影响的基于电压稳定因子(voltage stability indicator,VSI)的换相失败免疫水平快速评估方法,基于CIGRE Benchmark标准直流系统搭建了LCC-HVDC测试算例,仿真分析了所提方法的准确性和快速性;建立了HMIDC系统在LCC-HVDC换流母线处的双母线戴维南等值单馈入分析模型,然后定义了在对应LCC-HVDC换流母线处的等值单馈入电压稳定因子(equivalent voltage stability indicator,EVSI)。在分析换流器功率电压特性和相角电压特性的基础上,研究了EVSI的求取方法;最后提出了基于EVSI的HMIDC换相失败免疫水平快速评估方法,基于混合双馈入直流输电系统模型的仿真结果验证了所提方法的有效性。
[Abstract]:In this paper, a fast method to evaluate the immunity level of commutation failure in hybrid multi-fed HVDC system (hybrid multiinfeed high voltage direct / HMIDC) is presented, which results in a large amount of computation due to the use of simulation methods in the study of commutation failure. In this paper, a fast method for evaluating the level of commutation failure immunity based on voltage stability factor (voltage stability indicator VSI) is proposed for single feed commutator HVDC (line commutated converter based high voltage direct currentLCC-HVDC (HVDC) system, which takes into account the first and second parameters of DC system. Based on CIGRE benchmark standard DC system, a test example of LCC-HVDC is built, and the accuracy and rapidity of the proposed method are simulated and analyzed, and a double-bus Davinan equivalent single-feed analysis model of HMIDC system in LCC-HVDC commutation bus is established. Then the equivalent single feed voltage stability factor (equivalent voltage stability indicator EVSI) at the corresponding LCC-HVDC commutation bus is defined. On the basis of analyzing the characteristics of converter power and phase angle voltage, the method of obtaining EVSI is studied, and the fast evaluation method of HMIDC commutation failure immunity level based on EVSI is proposed. The effectiveness of the proposed method is verified by simulation results based on a hybrid doubly fed HVDC system model.
【作者单位】：强电磁工程与新技术国家重点实验室(华中科技大学电气与电子工程学院);
【基金】：国家公派留学基金项目(201606160049)~~
【分类号】：TM721.1

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