【摘要】：城市軌道交通線路一般采用直流牽引供電系統(tǒng)為列車(chē)提供電能。直流牽引供電系統(tǒng)動(dòng)態(tài)運(yùn)行過(guò)程中,普遍存在鋼軌電位、雜散電流等回流安全參數(shù)異常升高問(wèn)題,對(duì)系統(tǒng)自身及周邊埋地金屬管線運(yùn)行安全造成嚴(yán)重危害。目前,我國(guó)正處于城市軌道交通快速發(fā)展階段,保證直流牽引供電系統(tǒng)運(yùn)行安全具有重要研究意義。本文以直流牽引供電系統(tǒng)回流安全為研究對(duì)象,對(duì)回流安全參數(shù)仿真方法、回流安全參數(shù)異常升高機(jī)理及系統(tǒng)運(yùn)行優(yōu)化控制方法進(jìn)行研究。本文針對(duì)直流牽引供電系統(tǒng)特性及回流安全參數(shù)特征開(kāi)展研究。分析系統(tǒng)整流機(jī)組穩(wěn)態(tài)調(diào)節(jié)特性,建立其多折線輸出特性曲線。闡述回流系統(tǒng)分布參數(shù)與集中參數(shù)共存的混合參數(shù)特點(diǎn),分析回流安全參數(shù)治理設(shè)備動(dòng)作特性。建立列車(chē)牽引計(jì)算模型及再生制動(dòng)能量吸收裝置模型,仿真分析系統(tǒng)負(fù)荷變化特性。建立單區(qū)間供電下回流安全參數(shù)分布模型,理論分析單區(qū)間供電模型下回流安全參數(shù)分布規(guī)律,對(duì)比實(shí)際系統(tǒng)回流安全參數(shù)異常分布現(xiàn)象,闡明現(xiàn)有模型及理論無(wú)法有效仿真、控制回流安全參數(shù)異常升高問(wèn)題。針對(duì)回流安全參數(shù)仿真方法,本文提出系統(tǒng)復(fù)雜運(yùn)行工況下回流安全參數(shù)快速仿真模型,實(shí)現(xiàn)回流安全參數(shù)的快速、精確計(jì)算。建立回流系統(tǒng)混合參數(shù)模型等效及參數(shù)修正方法,實(shí)現(xiàn)回流系統(tǒng)模型精確等效。提出直流牽引供電系統(tǒng)統(tǒng)一鏈?zhǔn)诫娐纺Ｐ?并基于該模型研究系統(tǒng)復(fù)雜運(yùn)行工況下潮流計(jì)算方法。建立回流安全參數(shù)計(jì)算模型,基于潮流分布實(shí)現(xiàn)回流安全參數(shù)計(jì)算。針對(duì)系統(tǒng)交流側(cè)網(wǎng)壓對(duì)直流側(cè)潮流影響,基于交替迭代法進(jìn)行系統(tǒng)交直流潮流計(jì)算。仿真分析與實(shí)例驗(yàn)證結(jié)果表明,回流安全參數(shù)快速仿真方法可實(shí)現(xiàn)系統(tǒng)復(fù)雜工況下回流安全參數(shù)分析。同時(shí),系統(tǒng)多牽引變電所多列車(chē)并列運(yùn)行時(shí)廣泛存在功率越區(qū)分配現(xiàn)象。本文針對(duì)回流安全參數(shù)異常升高機(jī)理開(kāi)展研究。建立系統(tǒng)牽引電流越區(qū)傳輸與回流安全參數(shù)關(guān)聯(lián)模型,分析兩者關(guān)聯(lián)變化規(guī)律。提出直流牽引供電系統(tǒng)潮流追蹤解析計(jì)算方法,實(shí)現(xiàn)了系統(tǒng)多牽引所多列車(chē)運(yùn)行時(shí)的功率分配計(jì)算。提出電流分配系數(shù)下回流安全參數(shù)分解方法,實(shí)現(xiàn)各電流分配分量對(duì)回流安全參數(shù)的影響分析。根據(jù)實(shí)際線路參數(shù),仿真分析了系統(tǒng)功率分配對(duì)回流安全參數(shù)異常升高的影響,闡釋實(shí)際系統(tǒng)回流安全參數(shù)異常升高機(jī)理。仿真分析了列車(chē)運(yùn)行功率重合度及再生制動(dòng)能量吸收啟動(dòng)閾值調(diào)節(jié)對(duì)回流安全參數(shù)的控制作用。通過(guò)現(xiàn)場(chǎng)實(shí)測(cè)分析,驗(yàn)證了系統(tǒng)功率越區(qū)分配對(duì)回流安全參數(shù)影響。本文針對(duì)再生制動(dòng)能量?jī)?yōu)化管理的回流安全參數(shù)控制方法開(kāi)展研究。闡述系統(tǒng)節(jié)能運(yùn)行過(guò)程與回流安全參數(shù)關(guān)系,對(duì)比分析再生制動(dòng)能量分配計(jì)算方法。提出系統(tǒng)再生制動(dòng)能量管理優(yōu)化目標(biāo)與優(yōu)化模型,實(shí)現(xiàn)系統(tǒng)回流安全與節(jié)能的綜合優(yōu)化控制。提出再生制動(dòng)能量管理優(yōu)化模型求解的改進(jìn)混沌粒子群算法,引入混沌理論及動(dòng)態(tài)慣性權(quán)重思想,避免尋優(yōu)過(guò)程過(guò)早收斂,并提高尋優(yōu)速度。實(shí)例分析結(jié)果表明,本文提出的再生制動(dòng)能量?jī)?yōu)化管理方法在實(shí)現(xiàn)回流安全的基礎(chǔ)上,可有效降低系統(tǒng)運(yùn)行損耗。本文針對(duì)能饋型直流牽引供電系統(tǒng)回流安全及節(jié)能運(yùn)行開(kāi)展研究。建立了能饋型直流牽引供電系統(tǒng)雙向變流機(jī)組潮流模型,實(shí)現(xiàn)系統(tǒng)交直流潮流計(jì)算接口的建模。提出了基于系統(tǒng)雙向變流器供電的回流安全及節(jié)能運(yùn)行解決方案,仿真分析了系統(tǒng)回流安全參數(shù)分布及能量損耗。分析結(jié)果表明雙向變流器供電方式可有效實(shí)現(xiàn)系統(tǒng)供電自分區(qū),控制系統(tǒng)功率越區(qū)分配,降低回流安全參數(shù)及系統(tǒng)損耗。設(shè)計(jì)了直流牽引供電系統(tǒng)2MW三電平雙向變流器,通過(guò)現(xiàn)場(chǎng)實(shí)驗(yàn)驗(yàn)證了其輸出特性。
文內(nèi)圖片：
圖片說(shuō)明：直流牽引供電系統(tǒng)鋼軌電位與雜散電流示意圖
[Abstract]:The urban rail traffic line generally uses the direct current traction power supply system to provide electric energy for the train. During the dynamic operation of the direct current traction power supply system, the problem of abnormal rise of the return safety parameters such as rail potential and stray current is common, and the operation safety of the system itself and the surrounding buried metal pipeline is seriously endangered. At present, China is in the rapid development stage of urban rail transit, and it is of great significance to ensure the operation safety of DC traction power supply system. In this paper, the return safety of the DC traction power supply system is the research object, and the simulation method of the return flow safety parameters, the abnormal raising mechanism of the return safety parameter and the control method of the system operation are studied. In this paper, the characteristics of the DC traction power supply system and the characteristics of the return safety parameters are studied. The steady state regulation characteristic of the rectifier unit of the system is analyzed, and the output characteristic curve of the multi-fold line is established. The characteristics of the mixed parameters of the distribution parameters of the reflux system and the co-existence of the lumped parameters are described, and the operating characteristics of the control equipment for the return safety parameters are analyzed. A train traction calculation model and a regenerative braking energy absorption device model are established to simulate and analyze the load change characteristics of the system. The distribution model of the return safety parameter under the single-section power supply is established, the distribution of the return safety parameters under the single-section power supply model is analyzed, the abnormal distribution of the return safety parameters of the actual system is compared, the existing model and the theory cannot be effectively simulated, And the problem of abnormal rise of the reflux safety parameter is controlled. According to the simulation method of the return flow safety parameter, this paper presents a fast simulation model of the return safety parameters under the complex operating conditions of the system, and the fast and accurate calculation of the return safety parameters is realized. The equivalent and parameter correction method of the mixed parameter model of the reflux system is established, and the exact equivalent of the model of the reflux system is realized. The unified chain circuit model of DC traction power supply system is put forward, and the method of power flow calculation under complex operating conditions of the system is studied. And a reflux safety parameter calculation model is established, and the reflux safety parameter calculation is realized based on the power flow distribution. In view of the influence of the system AC side network pressure on the flow of the DC side, the AC/ DC power flow calculation is carried out on the basis of the alternative iteration method. The simulation analysis and the example verification result show that the rapid simulation method of the return flow safety parameter can realize the analysis of the return safety parameters under the complex working conditions of the system. At the same time, there is a wide range of power handover in the multi-train parallel operation of the multi-traction substation in the system. In this paper, the mechanism of abnormal rise of reflux safety parameters is studied. The correlation model of the system traction current handoff and the return safety parameter is established, and the association rule of the two parameters is analyzed. The calculation method of the power flow tracing and analysis of the direct current traction power supply system is put forward, and the power distribution calculation in the multi-traction of the system is realized. The method for decomposing the return flow safety parameter under the current distribution coefficient is put forward, and the influence of each current distribution component on the return safety parameter is realized. Based on the actual line parameters, the influence of the system power distribution on the abnormal rise of the return safety parameters is analyzed, and the mechanism of the abnormal increase of the return safety parameter of the actual system is explained. The simulation and analysis of the operation power coincidence degree and the regenerative braking energy absorption start-up threshold adjust the control effect on the return safety parameters. The effect of system power handoff on the security parameters of the return flow is verified through the on-site measurement and analysis. In this paper, the method of return safety parameter control for regenerative braking energy optimization management is studied. The relationship between the energy-saving operation process and the return safety parameter of the system is described, and the calculation method of regenerative braking energy distribution is compared. The optimal objective and optimization model of the system regenerative braking energy management are put forward, and the comprehensive optimization control of the system return safety and energy saving is realized. In this paper, an improved hybrid particle swarm optimization algorithm for regenerative braking energy management optimization model is proposed, which is introduced into the theory of mixing and dynamic inertia weight, so as to avoid the premature convergence of the optimization process and to improve the optimization speed. The results of the example show that the regenerative braking energy optimization management method proposed in this paper can effectively reduce the running loss of the system on the basis of realizing the return flow safety. This paper studies the return safety and energy-saving operation of the energy-fed direct-current traction power supply system. The power flow model of the two-way converter unit of the energy-feed type DC traction power supply system is established, and the modeling of the AC/ DC power flow calculation interface is realized. The return safety and energy-saving operation solution based on the power supply of the two-way converter of the system are put forward, and the distribution and energy loss of the system return safety parameters are simulated and analyzed. The results show that the two-way converter power supply mode can effectively realize the self-zoning of the system power supply, the power hand-off of the control system, and reduce the return flow safety parameter and the system loss. The 2 MW three-level two-way converter of DC traction power supply system is designed, and its output characteristics are verified by field experiment.
【學(xué)位授予單位】：中國(guó)礦業(yè)大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2017
【分類號(hào)】：U223.6
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本文編號(hào)：2512548