【正文】 安排牽引系統(tǒng)的運行模式以盡量減少諧波失真成為可能，同時改善功率因數(shù)，降低變電站的諧波電流。目前國內(nèi)外已有的一些基于 GNSS 的軌道占用識別方法，包括檢測道岔、狀態(tài)輔助應(yīng)答器、檢測航向角、地圖匹配、詳細分析其原理，功 能以及優(yōu)缺點，認(rèn)為采用隱馬爾科夫模型進行定位不需要其它輔助手段，并可以有效地解決初始化定位問題，是一種較好的方法，需要進一步研究并進行實際測試驗證。 隨著電力牽引它也可以通過進一步增加再生制動，這意味著一個速度放慢，列車可利用電動機和發(fā)電機的回收作其他電動列車系統(tǒng)能源使用效率回來。理論分析和實例部署規(guī)劃表明，榕樹型拓?fù)渚哂休^低的傳輸延遲、較高的傳輸寬帶和較強的網(wǎng)絡(luò)健壯性，符合鐵路無線寬帶覆蓋的 要求。 對于 長途運行，如城際鐵路系統(tǒng)， 啟動 與滑行的運作模式可能會重復(fù)一次以上，以 滿足長途運行的要求。 系統(tǒng)的 基本模型和整流器 對于一個 大眾化的 運輸系統(tǒng)， 為了 提高 供電系統(tǒng)的 能源效率， 得同時利用再生制動與同變阻器制動 。落軸實驗時， 三型枕軌道結(jié)構(gòu)的鋼軌、軌枕震動加速度都比二型枕的小，且三型枕的震動頻率也要低得多，但兩種類型鋼軌軌道結(jié)構(gòu)的輪軌沖擊力相接近。 加強軌道結(jié)構(gòu)是基于諧波消除 改造的主要內(nèi)容之一。遺傳算法相比于以前的傳統(tǒng)的基于梯度的優(yōu)化方法具有許多優(yōu)勢，例如，發(fā)生算法的搜索范圍是從很多的點出發(fā)，而不是一個單一的點 。然后，將反饋線性化補償與擴張狀態(tài)觀測器相結(jié)合的懸浮控制器，利用外部擾動觀測值對懸浮系統(tǒng)進行補償。優(yōu)化解決方案可以集成到列車自動運行控制器以控制列車的調(diào)度，以及系統(tǒng)中每一輛列車速度的調(diào)節(jié)上。來自不同機車的相同頻率的諧波分量可能會相互抵消。雖然一些公司推脫自己作為牽引責(zé)任公司的電力供應(yīng)的責(zé)任，但是他們中的許多人還是希望通過他們自己的努力去解決這些問題。在蒸汽機型和新生機型的轉(zhuǎn)換空隙間，火車的轉(zhuǎn)換器單元將產(chǎn)生大量的諧波電流。優(yōu)化方案將在本文的最后給出。安排牽引系統(tǒng)的運行模式以盡量減少諧波失真成為可能，同時改善功率因數(shù)，降低變電站的諧波電流。s value and information, not derivation or other auxiliary knowledge, thus does not require the continuity of the objective function. In this study, a method based on harmonics cancellation is proposed to minimize average harmonic current distortion at substation. Geic algorithm is adopted for the optimization. Enhancing the railway track structure is one of the main tasks of railways before raising the spe9ed of trains. Now, there are Typethree and New Typetwo sleepers on the tracks of speedraising railways in China. Different track structures demonstrate different dynamic behavior. The dynamic characteristics of the track structures with the two types of sleepers are tested. Wheelset falling and dynamic exciting are the two loading ways. The dynamic responses are recorded, including the wheelrail impact force, railseat reverse, rail and sleeper vibration acceleration rate. Test results show that the mass of the Typethree sleeper is larger, so its track structure possesses much higher stiffness than the New Typetwo sleeper track structure. In the wheelset falling test, the typethree sleeper track structure offers smaller vibration acceleration rates of rails and sleepers and much lower vibration frequencies, as pared with the New Typetwo sleeper track structure. However, the wheelrail impact forces of the track structures with two types of sleepers are basically the same, Field tests show that the Typethree sleeper track structure is more stable. According to the test results, to enhance the track stability and prolong the track maintenance cycle, it is better to adopt Typethree sleepers and 60kg/m rails on the lines where trains where trains run at the speeds 160 km/h. The optimized schedule of the traction system can be integrated to the existing traction control system. BASIC MODEL OF SYSTEM AND RECTIFIERS For a mass transit system, in order to increase the energy efficiency of the power supply system, regenerative braking is employed together with the rheostat braking. During regenerative braking, the power is either absorbed by nearby trains or returned to the power system through converters in the nearby substations. For a given tr