1、 毕业论文 外文翻译 题 目 ： 工业企业无功补偿与节能 1 Industrial enterprises of reactive power compensation From:Power System Analysis and Design Abstract The improvement of industrial enterprises is to improve the power factor of electric power efficiency， an important means of saving energy. In this paper， theoretical a
2、nalysis and application examples of the industrial enterprises， the significance of reactive power compensation and the role and view of the current power system， industrial enterprises， the problems for the proposed improvements and measures. Introduction In industrial enterprises， the vast majorit
3、y of electrical equipment belongs to perceptual load， these devices in operation to absorb a large number of reactive power. An increase in reactive power supply system power factor to lower system voltage drop to occur， electrical equipment not fully utilized， increasing line losses and lower-power
4、ed equipment， power supply capacity and so on. In situ reactive power compensation and thus improve the power factor of the Energy Conservation has extremely important significance. The choice of method of compensation Compensation for reactive power compensation is divided into centralized and dece
5、ntralized compensation for three kinds of compensation and in situ. Focus on compensation， that is， high and low voltage power distribution set up by several groups within the capacitor ， capacitor connected to the power distribution bus ， the compensation for the distribution of power within the re
6、active power， and to reach the required value of the total power factor above. This method of compensation can compensate for high and low voltage bus routes prior to the reactive power， which is equivalent to the reactive power source to move the electricity distribution companies， allowing users t
7、o power the system requirements for reactive power has been reduction in 2 the electricity sector to achieve the required power factor. And their distribution within the enterprise bus following the line of transformer and reactive power compensation can not play a role， there is still a large numbe
8、r of reactive power line flows within the enterprise and generate losses. Dispersion compensation is the capacitors were installed at various workshops at the switchboard， which will enable installation of distribution transformer and the substation to the plant lines can be due to a decrease in rea
9、ctive load compensation effect. Local compensation is the reactive power compensation device directly connected to the induction motor terminals on the side or into the line. Focus on compensation methods used in the capacity of capacitor compensation or in-place than the grouping of compensation sh
10、ould be small， its utilization rate is even higher disadvantage is the change in distribution has not been compensated by the feeders， only lightened the load reactive power grid. Dispersion compensation in the way the utilization of capacitor compensation than the in situ high， so the total require
11、ment of compensation is smaller than the spot is an economical and reasonable remedy. Reactive power compensation should follow the overall planning ， rational distribution ， classification of compensation， in-place balance； focus on compensation and dispersion compensation combine to spread-based c
12、ompensation； high compensation and low voltage compensation combined with low-pressure-based compensation； Regulator combined with lower losses， down are the main loss principle 1. Compensation capacity to determine In the power grid in the reactive power consumption is a big， about 50% of the react
13、ive power consumed in transmission， transformation and the device， 50% of the consumed electricity users. In order to reduce reactive power consumption， it is necessary to reduce the reactive power in the grid where flow. The best way to start from the user to increase reactive power compensation， i
14、mprove user load power factor， so that Generator reactive power can be reduced and the reduction of transmission ， transformation and distribution equipment in the reactive power consumption， so as to achieve the purpose of reducing wear and tear 2. Compensation for reactive power capacity of Qc for
