汽轮发电机组凝结泵高压变频器改造的节能效果和经济性分析(吕学坤、陈国武).docVIP

第47卷 第1期 2002年1月 简 报 PAGE 1 汽轮发电机组凝结泵高压变频器改造的节能效果和经济性分析 吕学坤 陈国武 作者单位：国电靖远发电有限公司 地址：甘肃省白银市平川区电力路4号 邮编：730919 Energy saving analysis of the transformation of the condensate pump frequency converter Xuekun Lv Guowu Chen Author: Guodian Jingyuan Power Generation Co Ltd Address: Gansu Baiyin Pingchuan Power Road No. 4 Zip code: 730919 ABSTRACT: with the deepening of the reform, power generation enterprise competition is becoming increasingly fierce, unit annual utilization hours of a sharp decline, lower profits to the critical value, energy saving has become the only channel of each thermal power plant survival earnings, only lower thermal power plant fuel costs and plant electricity rate, optimize the unit operation index, to find the most reasonable operating conditions, in order to improve the electricity price competitiveness. Therefore, the motor frequency conversion technology for energy saving power plant auxiliary equipment, is the thermal power enterprises to improve their competitiveness imperative. The condensation water pump of 220MW thermal power generating set is transformed into frequency conversion speed regulation operation. The technology is feasible and the energy saving effect is obvious. Reasonable design of frequency conversion system, select the best frequency converter manufacturers to ensure that the reliability of the unit does not reduce the same time, with the least investment, to achieve the maximum energy saving effect. KEY WORD: Condensate pump; frequency conversion; reformation; energy saving. 摘要：随着竟价上网改革的深入，发电企业竞争日益激烈，火电机组全年利用小时急剧下降，边际利润降低至临界值，节能已成为各发电企业想要盈利生存的唯一渠道，只有降低发电厂燃料成本和厂用电率，优化机组运行指标，寻找最合理的运行工况，才能提高上网电价的竞争力。因此，采用电动机变频技术对电厂重要辅机进行节能改造，是各火电企业提高自身竞争力的当务之急。 我公司220MW火力发电机组的凝结水泵改造成变频调速运行，技术可行，节能效果明显。加之合理设计变频系统，择优选择变频器生产厂家能够保证在不降低机组可靠性的同时，用最少的投资，实现最大的节能效果。 关键词：凝结泵；变频；改造；节能。 1 引言 凝结水泵是凝结水系统的重要动力设备，它的作用是把凝汽器中的凝结水打入低压加热器加热后送入除氧器内，是变频拖动对象。在火电企业生产流程中，由于凝结泵在启停机与正常运行时需要满足不同的工况，凝结水泵在机组额定负荷出力下工频正常运行时已与经济运行工况偏差较大，更何况近年来火电机组装机容量