系線保護 的英文怎麼說
中文拼音 [xìxiànbǎohù]
系線保護
英文
aiming belays-
But there has been not correspondingly control system for it by far. ln this thesis a pulse nitrogenous conveying control system based on profibus is designed and achieved on the thinking of modularizing the pulse nitrogenous conveying system, which can be used for different the pulse nitrogenous conveying system and added new control cells. the thesis reviewed systematically the pulse nitrogenous conveying system in practical, and makes the understanding that the system is composed of standard gas storage cell, conveying equipment cell and target container ceil. then a common modularized control system project is designed and achieved by structurized programming orienting process, which consists of four control models, respectively for gas storage cell, for conveying equipment cell and for target container cell
本文綜合實際使用的氮保護脈沖氣力輸送系統，把氮保護脈沖氣力輸送系統分為標準化的氣源設備單元、發送設備單元和目的料倉設備單元，在此基礎上，設計了用於氮保護脈沖氣力輸送系統的通用模塊化控制方案，採用面向過程的結構化編程思想，基於profibus現場總線，實現了組成該方案的四類控制模塊：氣源單元控制模塊、發送單元控制模塊、目的料倉單元控制模塊和通訊處理控制模塊。According to the system technology require, adopting singlechip realize open loop digital control of hdclsm ; using v / f conversion and complex key - control method realize digital setting of system parameter, such as velocity ; using micro - stepping control insure the motor running more smoothly ; adopting debasing speed control method to eliminate the mechanical impact of distance termination effectively ; at the same time, analyzing main power circuits drive circuit and protect circuit of system, completing hardware design and facture and software programming and debugging ; at last, making a whole test in hybrid rotary step motor. the experiment result indicates that this control system reaches the qualities required and run smoothly also
根據系統技術要求，採用單片機實現了混合式直流直線步進電動機的開環數字控制；利用v f變換和復合鍵控方法實現了系統轉速等參數的數字設定；利用細分控制技術保證了電機運行的平穩性，並進行了波形分析和理論研究；採用單片機軟體降速控制策略解決直線步進電機行程末端的機械沖擊問題；同時對主功率電路、驅動電路和系統保護電路進行了分析，完成了硬體設計、製作和軟體編程、調試，最後在混合式旋轉步進電動機上進行了全面測試。After analyzing several kinds of protection for feeder line in subway dc traction power supply system, it is pointed out in the paper that the phenomena of refusing action and error action can not be avoided with existing protection which can not protect the whole feeder line
摘要分析了地鐵直流牽引供電系統中幾種常用的饋線保護類型，發現現有的保護方法很難避免跳閘保護拒動或誤動現象的發生，並且不能保護饋線的全長。Roll over protective structure ( rops ) is a device which installs on out of construction vehicle. the main functions are : when the vehicle rolling over. rops can prevent the vehicle from rolling over further, and reduce the possibility of rolling vehicle injures operator ; when the vehicle traveling on freezing soil. concrete and rock, it has large resist continuous impact ability ; when the vehicle overturning rops can support the whole vehicle. arrangement of falling object protective structure ( fops ) can block objects ( such as trees, rocks ) so that supply protection for operator. this problem is that research rolling over and falling objects protective structure of bulldozer by learning research condition of rops / fops and relative lay down international standard. on the base of theory analysis. detrudes counting formula of rops / fops deformation through founding mechanics analysis model of rops / fops at the stage of elasticity and plastoelastic. and finds a set of feasible nonlinear finite element analysis counting. lt calculates rops / fops plastoelastic deforma variable of 320hp bulldozer, bulldozer has been carried out by optimizing design method
其主要功能是：當車輛滾翻時， rops能刺入未凍土壤而阻止車輛的進一步滾翻，降低滾翻的車輛對系著安全帶司機軋傷的可能性；保證rops在碰撞和沖擊變形不大的地面（如凍土、混疑土上、巖石）時，能具有相當大的抗連續沖擊能力；當車輛已經處于顛覆狀態時，已經變形的rops應能支撐住整車。落物保護裝置（簡稱fops ） ，其構件的布置方式要能遮蔽墜落的物體（如，樹木、巖石等） ，以便對司機提供適當的保護。本課題主要通過了解國內外有關對rops fops的研究情況和有關國際標準的制定，對大型推土機傾翻和落物保護裝置進行研究，在理論分析的基礎上，通過建立rops fops的力學分析模型，推導彈性、彈塑性階段rops fops變形的計算公式，建立一套可行的rops fops的非線性有限元分析計算方法。But when fault was occurred, sometimes there would be great loss. for the reason, the paper put forward a microcomputer bus protection scheme suit for mv or lv power system with low current grounding based on the great researching about the working theory of current bus protections and the characteristic of mv or lv system with low current grounding. based on it, the paper has designed the platform of the hardware and the software programs
針對國內目前中、低壓電網大都未裝設母線保護裝置，發生故障不能及時切除時造成很大損失的狀況，本文在廣泛研究當前主流的母線保護動作原理並認真分析了中、低壓小電流接地系統特點的基礎上，提出了一套適合中、低壓微機母線保護裝置的研製方案，並據此選擇、搭建了硬體平臺，設計了軟體功能程序。On the basis of the comparison of successful experiences of running agricultural education in developed counties, such as usa, japan and france, this paper put forward following viewpoints : in order to visualize the strategic status of hae, necessary protectionism must be offered through lawmaking and hortative policies, peasantry - undergraduates facing agricultural production must be cultured in the process of expanding and developing hae. the opportunities of developing higher agricultural vocational and technical education must be grasped in the process of realizing the transit from elite - education to popularization - education. existent and developmental room of hae must be unceasingly widened basing upon the road of distinctiveness, integration and internationalization
文章在比較美國、日本、法國等國家發展高等農業教育的成功做法和經驗的基礎上，提出了要通過立法或制定鼓勵政策來彰顯高等農業教育的戰略地位，為高等農業教育的發展提供必要的政策性保護；要在大力擴張高等農業教育的過程中培養面向農業生產一線的農民身份的大學生；要在實現農科精英教育向大眾化教育轉軌的過程中抓住發展高等農業職業技術教育的機遇；要通過立足走特色化、綜合化和國際化的道路來不斷拓展高等農業教育的生存和發展空間；要正確處理精英教育與大眾化教育的關系，明確各類農業高校的生態位等發展高等農業教育的觀點和思路。Prf1, modular fixed surge arresters, used for trolly wire protection
架空進線保護： prf1系列用於通信系統保護的Aircraft flight dynamic and envelope protection control law in smart icing system are researched in this thesis
本文對結冰飛行動力學特性及智能防冰系統中的包線保護控制律設計問題進行了研究。On the basis of these, a simplified iced aerodynamics model is established, describes the effects of aircraft icing on aerodynamic parameters. main principle and implement method of iced aircraft envelope protection system are proposed. after ascertain iced aircraft envelope, for pilot and autopilot, open - loop and close - loop aircraft envelope protection control law respective designed, ensure the aircraft will efficiently follow the flight path specified by the pilot in the safe - flight envelope
在此基礎上，建立了簡化的飛機結冰氣動模型，以描述結冰對氣動參數的影響;給出了結冰飛行包線保護系統的基本原理及實現方法，在計算確定結冰飛行包線后，對於人工駕駛、自動駕駛飛行兩種情況，分別設計了開環、閉環飛行包線保護控制律，保證飛機在安全飛行包線內沿著預定的航線飛行。It combines feeder automation, and develops the fault identifying principle from one direction to two direction. so it enhances the redundancy of fault information, and improves the reliability of the fault location. we choose the transient zero current prior to others, for it is bigger than others mostly
本文敘述了饋線系統保護原理，提出了基於饋線自動化系統的幾種單相接地故障處理方案，討論了這幾種方案下故障特徵量的比較方式，分析了故障特徵量選用的出發點以及配電終端地址命名規則等問題。Simulation results demonstrate that iced aircraft envelope protection is capable of successfully avoiding incidents and accidents during flight in icing conditions, provide flying safety, operate definite action on the design of next generation civil airplane
研究結果表明，結冰飛行包線保護系統將極大增強飛機容冰能力，保證飛機在各種結冰情況下的飛行安全，在下一代民機的研製中起到一定的作用。Through the practice of deep foundation top - down for youyou international square, some key construction techniques were introduced, including structure of bored and double stirring piles, down - top construction in high - rise buildings, top - down in low - rise buildings, protection of railways, methods for excavation
摘要通過由由國際廣場深基坑逆作施工實踐，著重介紹了灌注樁加雙排攪拌樁止水帷幕圍護體系、主樓順作裙房逆作、電纜翻交、軌道交通四號線保護、挖土施工等關鍵施工技術。Firstly, the paper introduced the commonly hardware configure of microcomputer relaying and the function of every module of industry controlling computer std90386. secondly, the paper introduced several types busbarprotection which was commonly installed on electric power system and the characteristic of mv or lv system with low current grounding. based on it, the paper put forwards the theory of percentage - restraint differential relay. after that, in the discussing every problems of the relaying working the paper put the emphasis on the negative effect of the ct saturation and countermeasure
本文首先介紹了微機保護裝置的一般硬體配置以及作為裝置硬體平臺的std90386工控機各組件模板的功能，然後分析了目前電網系統裝設的母線保護的各種類型以及中、低壓小電流接地電網的特點，在此基礎上分析、介紹了作為本保護動作原理的「比率制動式差動保護」原理。At present the special protective devices for busbars in middle and low voltage distribution networks are still not common. only appended to original busbar protections, so the faults occurred in middle and low voltage busbars have to be cleared by back - up relaying with long time delay. thus, some kind of faults may spread which originally could be cleared and tremendous economy loss may appear
在電力系統中35kv及以下電壓等級的母線由於沒有穩定問題，一般未裝設專門母線保護，母線故障要由較長延時的后備保護來切除，使不少本可以得到控制的故障被發展和擴大，造成了巨大的經濟損失。Therefore, this paper makes an attempt to progress techno - alteration on middle armor - plated system and applies virtual instrument technology to industry scale. on its primary basis, we add some hardware, design its realtime protecting system and apply blur muster theory and data - amalgamation method
為此，本文嘗試對中板軋機系統進行技術改造，並將虛擬儀器技術應用到工業現場：在原有設備的基礎上，增加了一些硬體，設計了在線保護系統；應用虛擬儀器技術，用軟體實現部分系統功能；在數據處理中引入模糊集合理論和數據融合方法。The power circuit of the system adopts the voltage frequency conversion structure of ac - dc - ac, and is composed of the commutation circuit, filter circuit and intelligence power module ( pm15rsh120 ). control circuit takes the dsp chip tms320lf2407 as core, including the pwm signal occurrence circuit, detect circuit of stator current and direct current voltage of generatrix, drive circuit of intelligence power module, detect circuit of speed, protect circuit of system etc. all of this builds the full digital vector control system of asynchronous motor
該系統的功率電路採用電壓型的交-直-交變壓變頻結構，由整流電路、濾波電路及智能功率模塊ipm （ pm15rsh120 ）逆變電路構成;控制電路以dsp晶元tms320lf2407為核心，加上pwm信號發生電路、定子電流檢測電路、直流母線電壓檢測電路、智能功率模塊驅動電路、速度檢測電路、系統保護電路等，構成了功能齊全的異步電機全數字化矢量控制系統。In this paper. firstly, the new busbar protection theory of medium voltage system have been introduced and summarize, the feasibility of theory also demonstrated
接著在對小電流接地系統中特殊情況下的母線保護展開分析，並對其基本理論基礎和可行性進行了充分的論證。Aimed at the existing theory of the busbar protection, especially for busbar protection criterion in medium and low power system, this paper bring forward a new theory based on the currents of two phases
本文就現有的母線保護原理，特別是中壓系統母線保護的判據進行了較為深入的分析，並在此基礎上提出了基於兩相電流差的母線綜合保護原理。Fristly, according to the non - linear characteristics of twelve - phase rectifier, the thesis gives the calculation model for a short circuit in the subway traction power supply networks which provides the academic foundation for the design of the setting values and the simulation of protection. secondly, the thesis designs the dc feeder protection and control of subway, and gives the principle of setting accordingly, after it analysizes the characteristics of electric current under tow load and short circuit and considers severel factors. to validate the rationality of the design, the thesis simulates the transient electric current under two work conditions ( starting and passing the insulation ) ahd short circuit
其次，本文在詳細分析地鐵牽引負荷電流和饋線短路故障電流特點的基礎上，考慮了直流保護系統設計應注意的幾個因素，對地鐵饋線保護與控制進行配置，給出了相應的保護整定原則，並針對某一地鐵供電系統在詳細分析了兩種工況（機車起動與過分段絕緣）的電流暫態過程，得到了電流計算的數字模型，結合前面提出的短路模型，進行了地鐵饋線保護的模擬，經模擬表明本文的保護設計是合理的。Microprocessor based high voltage busbar protection has rapidly expanded. on the basis of analysis grouping - principle based middle and low voltage protection are put forward. the special busbar protection has adopted effective measures so that large improvement such as simpleness, reliability, economy, sensitivity and some appending additional functions has been obtaimed
高電壓等級母線微機保護已經進入到成熟發展階段，本文在對國內外現有母線保護進行研究分析的基礎上，根據中低壓母線的特點，提出了一種基於分組原理的母線保護，可以很好地解決中低壓母線保護的實際工程問題，使得系統簡單、可靠、經濟、靈活、易於擴展，而且容易附加其它的保護功能。分享友人