本文選題：混合式 + 負(fù)荷開(kāi)關(guān)　； 參考：《福州大學(xué)》2014年碩士論文

【摘要】：10kV輸配電線路上負(fù)荷開(kāi)關(guān)已經(jīng)大范圍替代傳統(tǒng)斷路器充當(dāng)控制設(shè)備和保護(hù)設(shè)備使用。論文對(duì)基于無(wú)功補(bǔ)償?shù)幕旌鲜截?fù)荷開(kāi)關(guān)進(jìn)行深入研究,包括無(wú)功補(bǔ)償方法的分析、基于無(wú)功補(bǔ)償?shù)幕旌鲜截?fù)荷開(kāi)關(guān)的原理分析、混合式負(fù)荷開(kāi)關(guān)的硬件設(shè)計(jì)、負(fù)荷開(kāi)關(guān)控制電磁鐵的分析與建模和基于小波神經(jīng)網(wǎng)絡(luò)的電磁鐵的控制技術(shù)。通過(guò)對(duì)切換電容器無(wú)功補(bǔ)償負(fù)荷開(kāi)關(guān)的工作原理和時(shí)序分析,提出將二極管作為無(wú)觸頭開(kāi)關(guān)與傳統(tǒng)負(fù)荷開(kāi)關(guān)的機(jī)械觸頭并聯(lián)組成混合式負(fù)荷開(kāi)關(guān),以實(shí)現(xiàn)負(fù)荷開(kāi)關(guān)的無(wú)弧切換,即正常工作時(shí)由機(jī)械開(kāi)關(guān)承擔(dān)負(fù)載電流,開(kāi)關(guān)瞬間由二極管處理瞬態(tài)電流。利用混合式負(fù)荷開(kāi)關(guān)替代傳統(tǒng)斷路器來(lái)投切并聯(lián)電容器,可以有效的降低投切并聯(lián)電容器組的資金投入,同時(shí)減小投切過(guò)程中對(duì)電網(wǎng)造成的沖擊電流,并通過(guò)Matlab仿真加以驗(yàn)證。根據(jù)混合式負(fù)荷開(kāi)關(guān)的特點(diǎn),將雙斷口斷路器的操作機(jī)構(gòu)和負(fù)荷開(kāi)關(guān)的隔離斷口結(jié)構(gòu)相結(jié)合,設(shè)計(jì)一種新型的混合式負(fù)荷開(kāi)關(guān)的雙斷口結(jié)構(gòu)。進(jìn)一步地,設(shè)計(jì)了混合式負(fù)荷開(kāi)關(guān)的控制系統(tǒng),包括單片機(jī)最小系統(tǒng)、電壓電流信號(hào)檢測(cè)系統(tǒng)、電磁機(jī)構(gòu)控制系統(tǒng)、混合式負(fù)荷開(kāi)關(guān)的顯示系統(tǒng)及按鍵操作系統(tǒng)。同時(shí),分別從硬件和軟件兩方面考慮混合式負(fù)荷開(kāi)關(guān)的抗干擾設(shè)計(jì),提高混合式負(fù)荷開(kāi)關(guān)的可靠性。分析長(zhǎng)行程推拉螺管式直流電磁鐵的特點(diǎn),提出了一種分段直流電磁鐵方案。將傳統(tǒng)的直流電磁鐵進(jìn)行分段設(shè)計(jì)并分析,發(fā)現(xiàn)分段式設(shè)計(jì)可以有效的提高直流電磁鐵的性能、減小直流電磁鐵的體積和直流電磁鐵穩(wěn)態(tài)損耗,同時(shí)還可以通過(guò)分段控制實(shí)現(xiàn)直流電磁鐵的推拉運(yùn)動(dòng)。進(jìn)一步地,應(yīng)用Ansoft電磁場(chǎng)仿真軟件建立分段式直流電磁鐵的電磁場(chǎng)與機(jī)械運(yùn)動(dòng)的瞬態(tài)耦合場(chǎng)仿真模型,通過(guò)仿真優(yōu)化了分段直流電磁鐵的結(jié)構(gòu)和控制設(shè)計(jì),同時(shí)通過(guò)軟件仿真驗(yàn)證了分段直流電磁鐵設(shè)計(jì)的可行性。最后,為了減小電磁鐵動(dòng)作時(shí)間分散性對(duì)混合式負(fù)荷開(kāi)關(guān)的影響,將小波神經(jīng)網(wǎng)絡(luò)引入直流電磁鐵的控制系統(tǒng)。采用單步預(yù)測(cè)方法,提高小波神經(jīng)在直流電磁鐵動(dòng)作時(shí)間預(yù)測(cè)的準(zhǔn)確性。進(jìn)一步地,通過(guò)dsPIC33F系列單片機(jī)實(shí)現(xiàn)小波神經(jīng)網(wǎng)絡(luò)預(yù)測(cè)算法,驗(yàn)證了小波神經(jīng)網(wǎng)絡(luò)在直流電磁鐵動(dòng)作時(shí)間預(yù)測(cè)的可行性,為這類(lèi)預(yù)測(cè)研究建立了理論基礎(chǔ)。
[Abstract]:Load switches on 10kV transmission and distribution lines have been widely used instead of traditional circuit breakers as control and protection equipment.In this paper, the hybrid load switch based on reactive power compensation is deeply studied, including the analysis of reactive power compensation method, the principle analysis of hybrid load switch based on reactive power compensation, and the hardware design of hybrid load switch.Analysis and modeling of load switch control electromagnet and control technology of electromagnet based on wavelet neural network.Based on the analysis of the working principle and timing of the switching capacitor reactive compensation load switch, a hybrid load switch is proposed by using the diode as the mechanical contact of the non-contact switch and the traditional load switch in parallel, so as to realize the no-arc switching of the load switch.In other words, the load current is assumed by the mechanical switch during normal operation, and the transient current is handled by the diode instantly.Using hybrid load switch instead of traditional circuit breaker to switch shunt capacitor can effectively reduce the investment of shunt capacitor bank and reduce the impulse current caused by switching process. The simulation results are verified by Matlab.According to the characteristics of hybrid load switch, a new type of double break structure of hybrid load switch is designed by combining the operation mechanism of double break circuit breaker with the isolated fracture structure of load switch.Furthermore, the control system of hybrid load switch is designed, including single chip microcomputer minimum system, voltage and current signal detection system, electromagnetic mechanism control system, display system of hybrid load switch and key operating system.At the same time, the anti-interference design of the hybrid load switch is considered in both hardware and software to improve the reliability of the hybrid load switch.This paper analyzes the characteristics of long stroke push-pull snail type DC electromagnet, and puts forward a piecewise DC electromagnet scheme.The traditional DC electromagnet is designed and analyzed. It is found that the segmented design can effectively improve the performance of DC electromagnet and reduce the volume of DC electromagnet and the steady loss of DC electromagnet.At the same time, the push-pull motion of DC electromagnet can be realized by subsection control.Furthermore, the transient coupling field simulation model between the electromagnetic field and mechanical motion of the segmented DC electromagnet is established by using the Ansoft electromagnetic field simulation software. The structure and control design of the segmented DC electromagnet are optimized by simulation.At the same time, the feasibility of the design of subsection DC electromagnet is verified by software simulation.Finally, in order to reduce the influence of the dispersion of electromagnet action time on the hybrid load switch, wavelet neural network is introduced into the DC electromagnet control system.The single step prediction method is used to improve the accuracy of wavelet neural prediction in DC electromagnet action time prediction.Furthermore, the prediction algorithm of wavelet neural network is realized by dsPIC33F series single-chip computer, which verifies the feasibility of wavelet neural network in predicting the action time of DC electromagnet, and establishes the theoretical foundation for this kind of prediction research.
【學(xué)位授予單位】：福州大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TM564.2

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