住宅小区配电设计外文文献翻译中英文(共18页).doc

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1、精选优质文档-倾情为你奉上外文文献翻译 (含：英文原文及中文译文)译文字数：3700多字 文献出处： J Ehnberg. Power of Community Distribution to DesignJ Value Engineering, 2016, 2(3):14-21英文原文 Power of Community Distribution to DesignJ EhnbergABSTRACTThe basic function of the electric power system is to transport the electric power towards custom

2、ers. The l0kV electric distribution net is a key point that connects the power supply with the electricity using on the industry, business and daily-life. For the electric power, allcostumers expect to pay the lowest price for the highest reliability, but dont consider that its self-contradictory in

3、 the co-existence of economy and reliable.To improve the reliability of the power supply network, we must increase the investment cost of the network construction But, if the cost that improve the reliability of the network construction, but the investment on this kind of construction would be worth

4、less if the reducing loss is on the power-off is less than the increasing investment on improving the reliability .Thus we find out a balance point to make the most economic, between the investment and the loss by calculating the investment on power net and the loss brought from power-off.KEYWORDS:

5、power supply and distribution, power distribution reliability , reactive compensation, load distributionIn general, major changes to the building include: high voltage and low voltage distribution systems, transformers, and backup power systems. Power systems include power distribution and control,

6、indoor and outdoor lighting systems include all types of lighting, and lightning protection systems include intrusion protection, lightning sensors, grounding, equipotential bonding, and local equipotential bonding. Auxiliary equipotential bonding. In just 20 years, the system has undergone enormous

7、 changes in the face of technology and products. Many design ideas have also changed dramatically. Switchgear, such as the first circuit-breaker oil circuit breaker in a high-voltage system, and the subsequent development of an oil circuit breaker, are not only large in size but generally contain oi

8、l. Due to the large size of the switchgear, we must also establish a separate equipment room that occupies a large amount of floor area. Vacuum circuit breakers and sulfur hexafluoride circuit breakers are not only small in size, but also have a large short-circuit capacity. The size of the housing

9、is much larger than that of the original cabinets, and the circuit breakers do not have any oil and the fire performance is greatly improved. And circuit breakers and other low-voltage devices are in one room, which saves space and is easy to manage. In the past, large-capacity low-voltage circuit b

10、reakers gradually increased the capacity of the short-circuit current, gradually reduced the scale, and became more stable, making the system safer and more reliable, which facilitated the design. Towards the development of intelligent low-voltage circuit breakers, various parameters of the circuit

11、breaker can be controlled by the bus industry and the signals are transmitted directly to the computer.The appearance of dry-type transformers has brought great convenience to the electrical design of buildings because there is no possibility of leakage of transformer oil and fire so that it can be

12、easily installed in the building itself and even directly into the load center. It also eliminates the transformers demand for oil and can use dry-type transformers when building large-capacity equipment. Four Taiwanese 2500kVA dry-type transformers have been used in actual engineering design.In ter

13、ms of using emergency generators, it is much more advanced than in the past in terms of performance and size. In addition to using diesel generators; emergency lighting uses EPS standby power; devices that interrupt power within a millisecond can use UPS.The control of electrical equipment varies fr

14、om the control of a single component to the control of relays. In addition to the smaller size of the various components for better performance, the specification of the control box is also reduced. Because digital technology is more used in control to achieve the best control status to control the

15、equipment. Further improve the effect of energy conservation.The revolution of electric power system has brought a new big round construction, which is pushing the greater revolution of electric power technique along with the application of new technique and advanced equipment. Especially, the combi

16、nation of the information technique and electric power technique, to great ex- tent, has improved reliability on electric quality and electric supply. The technical development decreases the cost on electric construction and drives innovation of electric network. On the basis of national and interna

17、tional advanced electric knowledge, the dissertation introduces the research hotspot for present electric power syetem as following.Firstly, This dissertation introduces the building condition of distribution automation(DA), and brings forward two typical construction modes on DA construction, integ

18、rative mode and fission mode .It emphasize the DA structure under the condition of the fission mode and presents the system configuration, the main station scheme, the feeder scheme, the optimized communication scheme etc., which is for DA research reference.Secondly, as for the (DA) trouble measure

19、ment, position, isolation and resume, This dissertation analyzes the changes of pressure and current for line problem, gets math equation by educing phase short circuit and problem position under the condition of single-phase and works out equation and several parameter s U& , s I& and e I& table on

20、 problem . It brings out optimized isolation and resume plan, realizes auto isolation and network reconstruction, reduces the power off range and time and improves the reliability of electric power supply through problem self- diagnoses and self-analysis. It also introduces software flow and use for

21、 problem judgement and sets a model on network reconstruction and computer flow.Thirdly, electricity system state is estimated to be one of the key techniques in DA realization. The dissertation recommends the resolvent of bad measurement data and structure mistake on the ground of describing state

22、estimate way. It also advances a practical test and judging way on topology mistake in state estimate about bad data test and abnormity in state estimate as well as the problem and effect on bad data from state measure to state estimate .As for real time monitor and control problem, the dissertation

23、 introduces a new way to solve them by electricity break and exceptional analysis, and the way has been tested in Weifang DA.Fourthly, about the difficulty for building the model of load forecasting, big parameter scatter limit and something concerned, the dissertation introduces some parameters, eg

24、. weather factor, date type and social environment effect based on analysis of routine load forecasting and means. It presents the way for electricity load forecasting founded on neural network(ANN),which has been tested its validity by example and made to be good practical effect.Fifthly, concernin

25、g the lack of concordant wave on preve nting concordant wave and non-power compensation and non-continuity on compensation, there is a topology structure of PWM main circuit and nonpower theory on active filter the waves technique and builds flat proof on the ground of Saber Designer and proves to b

26、e practical. Meanwhile, it analyzes and designs the way of non-power need of electric network tre- nds and decreasing line loss combined with DA, which have been tested its objective economic benefit throu- gh counting example.Sixthly, not only do the dissertation design a way founded on the magrgin

27、al electric price fitted to our present national electric power market with regards to future trends of electric power market in China and fair trade under the government surveillance, that is group competitio n in short-term trade under the way of grouped price and quantity harmony, but also puts f

28、orward combination arithmetic, math model of trading plan and safty economical restriction. It can solve the original contradiction between medium and long term contract price and short term competitive price with improvement on competitive percentage and cut down the unfair income difference of ele

29、ctric factory, at the same time, it can optimize the electric limit for all electric factories and reduce the total purchase charge of electric power from burthen curve of whole electric market network.The distribution network is an important link among the power system. Its neutral grounding mode a

30、nd operation connects security and stability of the power system directly. At the same time, the problem about neutral grounding is associated with national conditions, natural environment, device fabrication and operation. For example, the activity situation of the thunder and lightning, insulating

31、 structure and the peripheral interference will influence the choice of neutral grounding mode Conversely, neutral grounding mode affects design, operation, debugs and developing. Generally in the system higher in grade in the voltage, the insulating expenses account for more sizable proportion at t

32、he total price of the equipment. It is very remarkable to bring the economic benefits by reducing the insulating level. Usually such system adopt the neutral directly grounding and adopt the autoreclosing to guarantee power supply reliability. On the contrary, the system which is lower in the voltag

33、e adopts neutral none grounding to raise power supply reliability. So it is an important subject to make use of new- type earth device to apply to the distribution network under considering the situation in such factors of various fields as power supply reliability, safety factor, over-voltage facto

34、r, the choice of relay protection, investment cost, etc.The main work of this paper is to research and choice the neutral grounding mode of the l0kV distribution network. The neutral grounding mode of the l0kV network mainly adopts none grounding, grounding by arc suppressing coil, grounding by reac

35、tance grounding and directly grounding. The best grounding mode is confirmed through the technology comparison. It can help the network run in safety and limit the earth electric arc by using auto-tracking compensate device and using the line protection with the detection of the sensitive small grou

36、nd current. The paper introduces and analyzes the characteristic of all kind of grounding modes about l0kV network at first. With the comparison with technological and economy, the conclusion is drawn that the improved arc suppressing coil grounding mode shows a very big development potential.Then,

37、this paper researches and introduces some operation characteristics of the arc suppressing coil grounding mode of the l0kV distribution network. And then the paper put emphasis on how to extinguish the earth electric arc effectively by utilizing the resonance principle. This paper combines the devel

38、opment of domestic and international technology and innovative achievement, and introduces the computer earth protection and autotracking compensate device. It proves that the improved arc suppressing coil grounding mode have better operation characteristics in power supply reliability, personal sec

39、urity, security of equipment and interference of communication. The application of the arc suppressing coil grounding mode is also researched in this paper.Finally, the paper summarizes this topic research. As a result of the domination of the arc suppressing coil grounding mode, it should be more p

40、opularized and applied in the distribution network in the future.The way of thinking, project and conclusions in this thesis have effect on the research to choose the neutral grounding mode not only in I0kV distribution network but also in other power system.The basic function of the electric power

41、system is to transport the electric power towards customers. The l0kV electric distribution net is a key point that connects the power supply with the electricity using on the industry, business and daily-life. For the electric power, all costumers expect to pay the lowest price for the highest reli

42、ability, but dont consider that its self-contradictory in the co-existence of economy and reliable. To improve the reliability of the power supply network, we must increase the investment cost of the network con- struction But, if the cost that improve the reliability of the network construction, bu

43、t the investment on this kind of construction would be worthless if the reducing loss is on the power-off is less than the increasing investment on improving the reliability .Thus we find out a balance point to make the most economic, between the investment and the loss by calculating the investment

44、 on power net and the loss brought from power-off. The thesis analyses on the economic and the reliable of the various line modes, according to the characteristics various line modes existed in the electric distribution net in foshan.First, the thesis introduces as the different line modes in the l0

45、kV electric distribution net and in some foreign countries. Making it clear tow to conduct analyzing on the line mode of the electric distribution net, and telling us how important and necessary that analyses are.Second, it turns to the necessity of calculating the number of optimization subsection,

46、 elaborating how it influences on the economy and reliability. Then by building up the calculation mode of the number of optimization subsection it introduces different power supply projects on the different line modes in brief. Third, it carries on the calculation and analyses towards the reliabili

47、ty and economy of the different line modes of electric distribution net, describing drafts according by the calculation. Then it makes analysis and discussion on the number of optimization subsection.At last, the article make conclusion on the economy and reliability of different line modes, as well

48、 as, its application situation. Accordion to the actual circumstance, the thesis puts forward the beneficial suggestion on the programming and construction of the l0kV electric distribution net in all areas in foshan. Providing the basic theories and beneficial guideline for the programming design o

49、f the lOkV electric distribution net and building up a solid net, reasonable layout, qualified safe and efficiently-worked electric distribution net.Auto-Tune SequenceThe auto-tuning sequence begins after the hysteresis and deviation values have been determined. The tuning process begins when the initial output step is applied to the loop output.This change in output value should cause a corresponding change in the value of the process variable. When the output change drives the PV away from setpoint far enough to ex