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On the merits and demerits of distribution network management compensation


(VQC) applications. (6) to improve the user the power factor of the assessment criteria. Energy-saving proposal from the perspective of society as a whole, revised user reactive assessment methods, and increase the power plant, power grid, the user's power factor management, improve the power factor assessment criteria,mbt chaussures paris, such as industrial users of 160kVA and above the standard rate of force from the original 0 .9 increased to 0.95, and as far as possible the user side of the local reactive compensation, truly local reactive balance. 4 user over compensation to correct one case a high-500kVA 10kV transformer capacity for high-scoring users, April 2007 power factor of only 0.65,christian louboutin boutique, while the rate of force assessment criteria 0.9, according to the power factor adjustment to the tariff control Table rough calculation, a single power transfer electricity users pay much more per month on electricity 2774 yuan. Further examination revealed that the user of low power factor due to electricity load has been light, although the user installed a compensation device, but the compensation device with manual switching mode operation at light load there have been compensation, to send down a large number of capacitive reactive power grid, the user, causing the user to increase reactive power, power factor decreased, increase in electricity costs. To address the user exists over the issue of compensation, by helping customers to use automatic switching of reactive power compensation mode, set the upper and lower control the power factor of 0.97 and 0.90, respectively, when the power factor the more upper or lower limit, automatic control device by analyzing the power factor and the amount of reactive power required to determine the input capacitor bank withdrawal or automatic, so that to maintain power factor within the set range, to avoid the compensation owed to 86 Wuzheng Fang: On the merits and demerits of distribution network management compensation 2009 In the first three baskets to make a transcript of the amount of compensation from investment References: type, the user transfer electricity to power the month award was 403 yuan, to obtain ~ ~. The switching of reactive power compensation device to bring economic benefits. [1] Energy Power [1988198 No. power system voltage and reactive regulations [M] 5 Conclusion with the most reasonable reactive power compensation should be in a state of slight under-compensation, the power factor remained at around 0.95, both to maintain system stability, but also reduce wear and tear. Therefore, demand side management, the user should pay attention to not only install the reasonable capacity of reactive power compensation devices, more attention should be paid to strengthen the operation of reactive power compensation device management. Use of appropriate technology management tools to prevent excessive compensation, from the price policy on the assessment, full use of economic levers to stimulate the market, should be the distribution network operation and management concern. Beijing: China Electric Power Press. 1988. [2] Chen Heng. Power system steady-state analysis [M]. Beijing: China Water Power Press. 1994. [3] DL/T448-2000 energy metering device technology management procedures to learn Reading [M]. Beijing: China Electric Power Press, 2001. Received date :2009-03-1l Author: Wu Zhengfang (1971 A),abercrombie marseille, female, Tiantai, engineers, engaged in power marketing, power monitoring. (This editor: Gong Hao) (on p. 79) Note: The chart root base ring layout diagram of Figure 5 check reduction factor = 0.485, = F / @ A = 3000/0.485 × 19.16 = 322 .8 <[] so the use of steel to meet the requirements of the specifications. (2) Triangle bracket welded by the combination of channel 18. Channel strength check: check number was l8 channel W = 141cm3 port = M/1V = 1500X149.4 / 2 × 141:794.7 kg / c <[] ... it is making use of the channel on the triangular frame size, strength meet the requirements. 3 Conclusion designed to increase the base ring by special support bracket, ensuring the original design elevation of the base ring and base ring bolts to adjust the level of adjustment function based on the basis of the base ring to the second way of casting a cast to avoid a corrosive coastal environment, the actual base ring casting operation with the second surface of the gap that may exist and thus the problems caused by steel corrosion, the design changes have also been recognized by the fan design side, the unit 81 sets of 750kW installation has been successfully applied, and 1500kW units will be installed in 94 units in the implementation. Water in the coastal beach areas, the soil has a corrosive environment, the installed base ring with a certain reference. References: [1] Liu Hongwen. Mechanics of Materials (Volume III) [M]. Beijing: Higher Education Press, 1995. [2] Wang Wenbin. Mechanical Design Manual [M]. Beijing: Mechanical Industry Press, 2007. Received date: 2009 a Ol-O6 Author: Tong Wenbin (1976), male, Hangzhou, engineers, major infrastructure projects in power engineering technical work. (This article Editor: Yang Yong)
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