調平壓載 的英文怎麼說
中文拼音 [diàopíngyāzǎi]
調平壓載
英文
trimming ballast-
The improvement system is made up of the pressure sensor, flow sensor, displacement sensor, electro - hydraulic proportional flow control valve, power amplifier, data gathering board and computer. the platform can carry out testing the hydraulic parameters, processing the tested data, saving the processed data and drawing, adjusting the pressure automatically
改造后的測控系統主要由壓力傳感器、流量傳感器、位移傳感器、比例節流閥、功率放大器、數據採集卡和計算機組成。改造后的實驗臺具有自動採集實驗數據、自動處理實驗數據、自動保存實驗數據、自動調節液壓系統負載壓力等功能,大大提高了實驗臺的工作效率、測試精度和智能化水平。Using the traits of arc adjust itself of the co _ 2 welding, adopting slow - descending feature or even feature of electrical source equipping with system that delivering the welding rod at the invariable speed, then, the arc burning steadily is realized, and the quality of welding is improved
利用co _ 2氣體保護焊電弧的自身調節特性,採用緩降或平硬特性的電源配等速送絲系統,通過改變電源空載電壓來調節電弧電壓,再利用電弧電壓和熔化速度之間的關系調節焊絲熔化速度使之等於送絲速度,最終實現電弧的穩定燃燒。Firstly, the steel frame is generally investigated and inspected, including the surface status, distortion, strain of the crane - beam, horizontal load and wheel - stress of the crane, dynamic characteristic and reaction of tne frame, so on. in this way. the particular status and characteristic of this kind of steel frame are mastered
首先,對鋼框架進行了全面的調查和檢測,包括鋼框架的外觀狀況、變形、吊車梁應變、吊車輪壓和水平荷載、框架動力特性和動力反應等,掌握了該類鋼框架在實際使用過程中的具體特性和狀況,並提出吊車輪壓和水平荷載的測試方案和推斷方法。Then the paper uses the same typical four network operating conditions as the primary given conditions and when adding one set of the parallel capacitor bank, changing the 330 / 220kv transformer tap changer position step by step to change the transformer ration, through this study methods this paper found out all the optimized combination of the tap changer position and the amount of input reactive power, also obtained four sets of the 330kv, 220kv and hokv s / s bus voltage and the active and reactive power losses changing curves. through analyzing the optimized combination control curve and the network power flow, the paper generalizes the rules as following : the chief measure of coordinative control is inputting shunt reactor in chengxian s / s in winter time both in the planning year of 2010 & 2005 ; in summer time in planning year of 2010 the chief measure is to input proper shunt capacitor
本研究通過分析所獲得的最優綜合控制組合曲線及電網潮流,總結出了如下規則:隴南電網在2005年及2010年冬大、以及2005年夏小運行方式下,綜合控制應以成縣變投入適量並聯補償電抗器作為主要措施;在2010年夏小運行方式下則投入適量並聯補償電容器作為主要措施,再輔助以選擇合適的主變有載調壓分接頭來調節,達到控制網內無功潮流分佈合理、各變電站母線電壓在理想的范圍內時電網有功損耗最小,從而也提高了電網安全運行水平及供電質量。The study bases on the four operating conditions of which the longnan network will be implemented in the year of 2005 and 2010. first, this paper calculates the power flow distribution that including the line charging reactive power and input of the low - voltage shunt reactor in chengxian s / s. assumed that the bus voltage of tianshui s / s and bikou power plant to be constant, the study count the voltage level of the 330kv and 220kv bus - bar when the 330 / 220kv transformer in standard tap changer position. in order to set control rules
本文基於隴南電網在規劃發展水平年2005年及2010年的四種可能的運行方式下及潮流條件,計算出了計入線路充電無功及投入成縣變低壓並聯電抗器后的潮流分佈,在設定甘肅大網側及碧口電廠側母線電壓恆定條件下,計算了330kv及220kv主變在有載調壓標準分接頭變比下的330kv及220kv母線電壓水平。The inverted pwm changing electric current the technique is applied in the prototype model. the prototype model was tested and operated on spot, power factor could reach beyond 0. 95, the effect of following modulating voltage was better, the curve of factor of modulated voltage of exchanging systems changed following load rate was linear, the output of wave form was a flat and steady sinusoidal wave
樣機採用了逆變式pwm變流技術,對其進行了現場測試與試運行,測試結果是電網側的功率因數可達0 . 95以上,跟蹤調壓效果良好,變流系統輸出調壓系數( k )隨負載率( p )的變化曲線基本滿足直線關系,輸出波形呈平滑穩定的正弦波。To sustain the voltage of dynaxno stable, we must regulate the excitation all the times, according to the capacty and the quality of load
要維持同步發電機端電壓為一定水平,就必須根據負載的大小及負載的性質隨時調節同步發電機的勵磁。In order to sustain the stable output voltage of generator, we must regulate the excitation at any moment according to the capacity and the quality of load
要維持同步發電機端電壓為一定水平,就必須根據負載的大小及負載的性質隨時調節同步發電機的勵磁。The delivery pressure acting on the spring loaded diaphragm throttles the balanced valve to control the pressure
水輸出壓力在彈簧負載隔膜的作用下對平衡閥進行節流調節,以控制水壓。The new unit has following technical features : ( 1 ) the unit ' s load is balanced by means of the accumulator and hydraulic cylinder with special structure ; ( 2 ) the installed power of the unit can be reduced greatly by adopting the accumulator ; ( 3 ) variable frequency speed regulation ensures good energy saving effect, and the closed oil circuit requires less hydraulic oil ; ( 4 ) a bi - directional hydraulic lock in the oil circuit ensures the stability and safety of the operation of the pumping unit
新型機具有4個技術特點: ( 1 )由於活塞柱塞式液壓缸的特殊結構和液壓蓄能器的配合使用,在平衡抽油機大部分載荷時,不需另外增加配重,可減小抽油機體積、質量和佔地面積; ( 2 )抽油機下沖程時,與活塞柱塞式液壓缸相連接的蓄能器吸收能量,上沖程時儲存在蓄能器中的能量補充載荷上行所需的能量,大幅度降低抽油機裝機功率; ( 3 )利用變頻容積調速節能效率高,閉式油路節省液壓油,同時大大減小液壓泵站的體積; ( 4 )在閉式油路中採用雙向液壓鎖可使抽油機的啟停更加平穩、迅速,其工作的穩定性和安全性更好。Then limiting load is decreased. ( 6 ) horizontal load can increase the coefficients of the modulation of moment when value of is little while decrease it when is large
( 6 )在中支座截面相對受壓區高度較小時,有水平荷載的框架其彎矩調幅系數要大於只有豎向荷載的框架。Because of forecasting reactive load at first, it can detect the change of voltage at low - voltage bus from the change of reactive load or the change of voltage at high - voltage bus, then it can decide that adjusting transformer tap or capacitor switch, and avoid blindly and deficient adjusting. on the condition the reactive power is balanced and voltage qualified, it can realize the switching times of loaded taps and capacitors being efficiently decreased
由於預先預測出無功負荷,提前了解了無功功率變化的趨勢,可以有助於判定低壓母線電壓變化是由無功負荷變化引起還是由高壓側電壓變化引起,從而適時決定是調有載調壓變壓器分接頭還是投切電容器,以此避免了盲目和不充分的調節,實現在保證無功基本平衡和電壓合格率的前提下,減少有載調壓變壓器分接頭的調節和並聯電容器組的投切次數。This research contains the tourism destination market structure, ecologic environment carry capacity of tourism area, long time series water resource and tourists amount, discussing several questions as bellowing : ( 1 ) seeking another tourism destination for instead to decrease the tourism pressure in over loaded destination ( 2 ) calculate environment quality level to optimize tourism planning distribution ( 3 ) estimate the varies trends of tourism destination water resource carry capacity and tourists amount in recent 10 years and give a forecast this research include the principal part of tourism, which is the tourists and tourists amount, mentioned in tourism surrounding carry capacity ; include the sustain part of tourism, which is the nature environment, mentioned in sewage acceptance ability. both the tourism market and tourism planning are considered to enhance environment carry capacity, and dynamic varies in water resources and tourist amount are researched though the long time series seasonal adjusting
本論文主要從旅遊目的地市場組成、旅遊地自然生態環境承載力、長時間序列的旅遊地水資源和遊客量入手,分析討論以下幾個問題: ( 1 )通過尋找替代旅遊目的地的方法,減小超載旅遊目的地旅遊環境壓力( 2 )計算環境質量水平,優化旅遊規劃分區( 3 )評估與預測旅遊地水資源承載力及多年遊客量的變化規律論文研究切入點既包括作為旅遊主體? ?遊客與遊客量,涉及游覽環境承載力方面,又從旅遊發展的載體? ?自然環境入手,涉及自然環境納污力方面;從旅遊市場和旅遊規劃兩方面考慮提高環境承載力的方法;並通過季節調整反映長時間序列水環境和遊客量的變化規律,對旅遊環境承載力的動態變化給予研究。This paper is the research on the local interactive buckling behavior of cold - formed rectangular tube under uniform compression. the paper includes the following main contents : ( 1 ) an elastic interactive buckling model is presented on the basis of the theory of elastic plates. under the equilibrium condition and deformation compatibility condition, analytical expressions are derived to predict the interactive bucking load pcr
本文主要研究冷彎薄壁矩形鋼管均勻受壓下板組的相關關系,包括以下主要內容: ( 1 )建立了彈性相關屈曲解析法分析模型,考慮平衡條件及變形協調條件,建立板組的屈曲微分方程,得出了板組相關屈曲的臨界荷載p _ ( cr )的計算行列式。According to the characteristic of nine - area diagram of substation vol / var coordinated control, this system gives the defination of fuzzy sets and the degree of membership of input / output variables, and designs corresponding control rules. the results of simulation demonstrate the system can satisfy the constrains of the day - adjusting times of the switching of on - load transformer and paralleled compensation capacitors, and ensure voltage quality, reactive power basical balance. considering the var requirement in different load time period and the control demand in load saltation, a improved control scheme is provided. the results of simulation show the improved scheme can meet the demand of vol / var in different load time period, protect the wrong operation when either voltage or reactive power appears saltation, and decrease the times of regulation of the switching of on - load transformer and paralleled compensation capacitors finally, a background software module of substation vol / var coordinated control is designed, based on the supervisory control and data acquisition system of substation
模擬結果證明該系統能在各種負荷條件下確保電壓合格和無功基本平衡,且能滿足變電站對有載調壓變壓器分接頭日調節次數和並聯補償電容器組的日投切次數的限制。通過考慮不同負荷時段對無功功率的需求和負荷突變情況下的控制要求,對上述模糊控制策略進行了改進,模擬結果證明改進后的控制策略能滿足不同負荷時段對電壓和無功的要求、抑制電壓或無功突變情況下的誤動作,且有效地減少了有載調壓變壓器分接頭和並聯補償電容器組的調節次數。最後基於變電站scada系統設計了一后臺電壓無功綜合控制軟體模塊。At first, this thesis analyzes the main causes in theory, which have effects on the redistribution of internal force and modulation of moment for the bonded post - tensioned partially prestressed concrete frame ( for short prestressed frame ), including the relative height of compressive zone of section ( ), secondary moment and types of load applying. then, this thesis analyzes the test of prestressed frame. then, a method, called curvature - force method, for nonlinear analysis of prestressed frame is put forward
本文首先從理論上分析了影響后張有粘結部分預應力混凝土框架(簡稱為預應力框架)內力重分佈和彎矩調幅的主要因素,即相對受壓區高度、次彎矩和加載方式等,並初步分析了兩榀只加豎向荷載和兩榀既加豎向荷載又加水平荷載的單層單跨預應力框架靜力加載的試驗。The examples of the planar gpa pressure explosive loading devices and its applications are given
給出了可調控靶中應力波形的平面低壓化爆加載裝置的應用實例。The study shows that this control approach can overcome those shortages of the methods which are adopted to control voltage and reactive power in substation nowadays, it can hold the voltage level in the regular bound and maintain the balance of reactive power in substation to the greatest extent, and it have the ability to seek the best solution. adopting this methods, the switching times of loaded taps and capacitors can be decreased efficiently and advance the running life - span of the transformer and capacitors and improve the economy benefits. this control approach is a advanced way ii and it is worth to study more and utilize
利用模糊神經網路對較好地實現對變電站的電壓、無功自動控制,能克服了目前在變電站電壓無功控制中普遍運用的分區方法存在的不足之處,不但可保持變電站電壓在合格的范圍內,盡量維持無功功率平衡,而且具有較好的尋優能力,有效減少變壓器有載調壓開關的切換次數和電容器組的投切次數,提高了變壓器和電容器的運行壽命,提高了經濟效益,是一種值得進一步探索和運用的較為先進的方法。In power system, it can effectively improve the voltage and decrease the real power loss that coordinated control the transformer tap and the compensatory capacitor of the region network. the voltage and reactive power control makes the running of the systems more safe and stable and economical
在電力系統中,對地區電網中的有載調壓變壓器和補償電容器進行協調控制,能夠有效提高電壓水平、降低有功功率損耗,對系統的安全穩定經濟運行具有重要意義。分享友人