工業(yè)企業(yè)無功補償與節(jié)能外文翻譯-免費閱讀
【正文】 提高變壓器二次側(cè)的功率因數(shù) ， 可使總的負荷電流減少 ， 從而減少銅損。 建議完善配電 設(shè)備或?qū)ζ溥M行重新改造 在現(xiàn)場測量數(shù)據(jù)的過程中 ， 我們發(fā)現(xiàn)很多配電設(shè)備老化現(xiàn)象嚴重 ， 沒有電流表、電壓表或者讀數(shù)不準確 ， 如鏜床車間的配電房內(nèi)完全沒有電流表和電壓表。因而提出高壓側(cè)集中補償和低壓側(cè)分散補償相結(jié)合的補償方式。 1 2 211100%U U tg xU Q R tg x? ??? ? ? ? 式中 1tg? — 未裝設(shè)補償裝置前 1? 角的正切 ； 2tg? — 裝設(shè)補償裝置后 2? 角的正切 ； R 、 x — 線路的電阻、電抗。當負荷變化較大時 ， 應(yīng)采用動態(tài)補償方式 ， 穩(wěn)定電壓。無功補償應(yīng)遵循“全面規(guī)劃 ， 合理布局 ， 分級補償 ， 就地平衡 。 2 補償方式的選擇 無功補償分為集中補償、分散補償和就地補償三種。 Regulator bined 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 reactive 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 pensation， improve 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 3 22121111c o s c o sc a vQP ????? ? ? ????? Load changes can be decided according to the static or dynamic pensation mode. When the load change is relatively stable， we should use the static method of pensation， which can not only reduce the line losses， and investment。 when the load change is large， dynamic pensation method should be used， stable voltage [3]. Reduce line losses Is located at a rated voltage， active power is constant， due to power factor changes， the line loss rate of change ΔP% for the 212c o s% 1 ( ) 1 0 0 %c o sP ????? ? ????? As can be seen from Table 1 to improve the power factor in lowering power consumption， improving economic efficiency plays an important role. Table 1 Power factor and power loss percentage of the corresponding data If a constant active power condition， the original power factor cosφ1 of ， pensated power factor cosφ2 of ， its line loss rate reduction ΔΡ% to 64%. Dynamic pensation device， Group to track the power capacitor pensation， power factor can be different from the stability provided in the context of the power factor to achieve adequate pensation purposes. Lines， transformer capacity increase Lines， transformer capacity increased ΔS for the 4 12co s1 co sSS ????? ? ????? Additional pensation device， may improve the power factor， power factor on the business of direct economic benefit is obvious. Because the state electricity system， starting from the rational use of energy， according to the power pany to adjust the price due to high and low values. The pensation device for enterprise and the entire power system economic operation all have significant economic effects . To improve the voltage quality To improve the voltage quality is the dynamic reactive power pensation equipment installed around the role of place in the line voltage pensation has increased slightly . 1 2 211100%U U tg xU Q R tg x? ??? ? ? ? Where tgφ1 pensation device is not installed before the φ1 angle tangent。集中補償 ， 即在高、低壓配電所內(nèi)設(shè)置若干組電容器
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