工业企业无功补偿与节能外文翻译(编辑修改稿)

工业企业无功补偿与节能外文翻译(编辑修改稿)内容摘要：

f the plant transformer 17660kVA， a total of 20 transformers (1 ~ 20， transformers)， each transformer capacity range of 50 ~ 1250 kVA， changing the ratio of 10kV / 014kV. Transformer low voltage side of the load is mainly motor， shown in the M1， M2 Mn shown. In general the rate of transformer load is basically maintained at 28% ~ 29%， and the maximum load of 7000kW. High and low voltage pensation to replace a bination of high concentration of pensation From the figure we can see the plant supply work focused on highvoltage power factor pensation is pensation that is only in the highvoltage busbar 10kV substation capacitor banks on the pick， while the low pressure has not taken any pensation measures. The fixed capacitor pensation method there have been pensation or due pensation， and right below the second power supply bus power factor pensation circuit does not work. As the low power factor caused by the line losses and transformer equipment is a big loss， so pensation as far as possible when 5 grading， installation of capacitors near the load. Therefore proposed that the high side to focus pensation and dispersion pensation for lowvoltage side of a bination of method of pensation . Figure 1 Power Supply System of a Heavy Machine Tool Plant diagram To change the power supply as much as possible to avoid the big horsedrawn cart phenomenon In making our selection， we should consider leaving a certain margin， to prevent heavy damage to equipment when， so most of the time caused by equipment， and severe underrun underrun the formation of the big horsedrawn cart Run. As the plant load factor of the transformer is basically 28% ~ 29%， and shows the transformer capacity is too large， transformer capacity can not be fully utilized， not only a waste of investment in equipment has increased the power loss. Rational choice by the transformer capacity and electrical equipment to reduce or limit the lightload or no load time to prevent the big horsedrawn cart phenomenon. To avoid the noload operation of equipment At present， the plant is running a serious load of some equipment. Improving the power factor， the first consideration should be given a reasonable run the equipment to improve power factor of power the device itself. The plant main load is AC motor， its power factor load with it change， motor idling， the power factor of about ~ between the rated load at ~ between the motor and thus should be made near the 6 rated load state run. We should improve the motor power factor， the simplest way is to use capacitors and electric motors in parallel， so to avoid the noload operation device is to improve the power factor equipment， an important way. Economic Benefit Analysis To the factory power supply system in two transformers， for example， installation of capacitors in the low voltage side， so that highpressure side of the plant to focus on pensation and dispersion pensation bination of lowvoltage side of a pensation formula， shown in Figure 2. Graph 2 transformer capacity of 800kVA， model S9 800 / 10， rated copper loss for the 715kW， transmission line model YJV22. Get price of yuan / kWh. The power factor by the pensation prior to to。