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  本文選題：高壓斷路器　切入點：系統(tǒng)仿真　出處：《南京理工大學》2014年碩士論文　論文類型：學位論文

【摘要】：隨著我國經濟的高速發(fā)展,電力需求快速增長,同時電力系統(tǒng)的可靠性要求也越來越高。高壓斷路器作為保障電網正常運行的關鍵部件,對其研發(fā)設計具有重要的實際應用價值。 高壓斷路器的開斷性能主要由其電氣性能與機械動力學性能決定。國內外高壓斷路器的研究通過理論分析、實驗測試以及計算機仿真技術取得了巨大進展。然而目前大部分研究把高壓斷路器各部分分割開來獨立分析,并沒有從整體上對高壓斷路器這類多能域耦合系統(tǒng)進行研究。本文以此為研究背景,從系統(tǒng)建模的角度出發(fā),利用虛擬樣機技術建立高壓斷路器機械、氣動、電子控制相結合的完整仿真模型。 以六氟化硫瓷柱式高壓斷路器為研究對象,首先對其操動機構、傳動機構以及滅弧室三個主要部分的結構組成和工作原理進行了介紹,在此基礎上對高壓斷路器各部分間的相互作用及能量關系進行了分析,建立了高壓斷路器的整體工作原理圖。根據高壓斷路器多能域耦合的特性及其研究設計流程,選擇AMESim軟件作為建模仿真平臺。 將操動機構開、合閘部分簡化成由彈簧驅動的曲柄滑塊機構,配以凸輪機構、脫扣/制動機構,添加控制系統(tǒng)以完成操動機構模型。將傳動機構視為兩個平行四桿機構的組合,利用多接口物塊元件模擬連桿和拐臂,物塊間采用鉸鏈連接。將滅弧室簡化為活塞結構,對其機械和氣動兩部分分別建模。最后將各部分在全局坐標中進行裝配連接,形成高壓斷路器整體多能域耦合模型。 針對高壓斷路器彈簧操動機構內的接觸碰撞問題進行深入分析,分別對凸輪類非協(xié)調性曲面接觸問題及鉸鏈類協(xié)調性曲面接觸問題,結合經典接觸理論,探求AME-Sim模型中接觸參數的合理定義方法。 研究優(yōu)化大質量彈簧在AMESim中的建模方法,以期能更準確地模擬彈簧動態(tài)性能對操動機構運動輸出的影響。從頻域與時域兩個反映彈簧動態(tài)性能的角度,對連續(xù)彈簧進行理論分析,對離散彈簧模型進行仿真分析,通過兩者對比研究AMESim中離散彈簧模型模擬真實彈簧的準確性。
[Abstract]:With the rapid development of China's economy, the demand for electricity is growing rapidly, and the reliability requirements of power system are becoming higher and higher. High voltage circuit breaker is the key component to ensure the normal operation of power network. It has important practical application value for its R & D design. The breaking performance of high voltage circuit breakers is mainly determined by their electrical and mechanical dynamic properties. The research of high voltage circuit breakers at home and abroad is analyzed theoretically. Great progress has been made in the experimental testing and computer simulation technology. However, most of the current research has separated the parts of the high voltage circuit breaker into independent analysis. In this paper, based on the background of the research, using the virtual prototype technology to establish the mechanical, pneumatic, and pneumatic of the high-voltage circuit breaker, this paper takes this as the research background, and from the point of view of system modeling, using virtual prototyping technology to establish the high-voltage circuit breaker mechanical, pneumatic, A complete simulation model combining electronic control. Taking the high voltage circuit breaker with porcelain hexafluoride column as the research object, the structure composition and working principle of three main parts of its operating mechanism, transmission mechanism and arc interrupter are introduced. On this basis, the interaction and energy relationship among the parts of high voltage circuit breaker are analyzed, and the overall working principle diagram of high voltage circuit breaker is established. According to the characteristics of multi energy domain coupling of high voltage circuit breaker and its research and design flow, AMESim software is chosen as modeling and simulation platform. The opening and closing part of the operating mechanism is simplified as a crank slider mechanism driven by a spring, with a cam mechanism, a release / brake mechanism, Control system is added to complete the operating mechanism model. The transmission mechanism is regarded as a combination of two parallel four-bar mechanisms. The connecting rod and the arm are simulated by using the multi-interface material block element, and the hinge connection is adopted between the blocks. The arc extinguishing chamber is simplified into a piston structure. The mechanical and pneumatic parts are modeled separately. Finally, the whole multi-energy domain coupling model of high voltage circuit breakers is formed by assembling the parts in the global coordinates. The contact collision problem in the spring operating mechanism of high voltage circuit breaker is analyzed in depth. The contact problem of cam non-conforming surface and hinge coordination surface is analyzed respectively, and the classical contact theory is combined. The reasonable definition method of contact parameters in AME-Sim model is discussed. The modeling method of optimizing mass spring in AMESim is studied in order to simulate the effect of spring dynamic performance on the kinematic output of actuator more accurately. The theoretical analysis of the continuous spring and the simulation of the discrete spring model are carried out. The accuracy of the simulation of the real spring in the discrete spring model in AMESim is studied by comparing the two models.
【學位授予單位】：南京理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM561

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本文編號：1642382