1、附录 附录一 外文资料原文及翻译 A1.1 原文 Retrospect and Prospect of Excitation Systems of Large Size Turbogenerators From ELECTRICITY 2002 NO.4 By Du xingyou Member of Scientific and Technological 都兴有 国家电力公司科学技术委员会委员 Abstract This paper briefs the developmental course,manufacturing and applications,as well as futur
2、e prospect of excitation systems of large size turbogenerators in China,emphatically expounds the advantages of self-excitation systems with potential source rectifiers and matters needing to be noted during dissemination and application of them . Keywords thermal power plant；large size turbogenerat
3、or；excitationsystem；self-shunt excitation In the late 1970s,the perfection works of indigenous large size thermal power generating units were started,the main objects of perfection were the original 125 MW,200 MW and 300 MW generating units,the excitation systems of these units,except for a few unit
4、s which employed direct current (d.c) exciters,were mainly equipped with excites,which included excitation power source(permanent magnet machine,alternating current(a.c.) rotating exciter, rectifier cubicle),slip ring, brush, brush holder, as well as de-excitation switch, de-excitation resistor,auto
5、matic voltage regulator(AVR).At the end of 1980s, the manufacturing technologies of 300 MW and 600 MW generating units of US based Westinghouse Corporation (WH) and Combustion Engineering Corporation (CE) were introdyced to China,the excitation system technology transferred by WH was brushless excit
6、ation. By the end of 1990s, the self-excitation systems with potential source rectifiers(self-shunt excitation) were most employed. 1.1 Harbin Electric Machinery Works Ltd.Co All the original 200 MW generators employed exciters； the imported type 300 MW generators were equipped with exciters in the
7、initial stages, and could be equipped with self-shunt excitation system later； the imported type 600 MW generators were first equipped with brushless excitation, and can also be equipped with self-shunt excitation system now too. Since these three excitation systems are available, it is very conveni
8、ent for customers to choose any kind excitation system to equip the recently produced 125 (135, 200) MW generators. 1.2 Shanghai Electric MachineryWorks Ltd. Co. Both the original double water inner cooling 125 MW (135 MWnow) and 300 MW generators were equipped with exctlers； theimported type 300 MW
9、 and 600 MW generators were equippedwith brushless excitation originally, and can be equipped with self-shunt excitation system now. Hence three types of excitation systems are available. 1.3 Dongfang Electric Machinery Ltd. Co. All the original 200 MW generators were equipped with exciters, the 300
10、 MW generators were equipped with exciters or self-shunt excitation system； the 600 MW generators with Japanese Hitachi technology introduced employ self-shunt excitation system. The 125 (135) MW generators made recently can be equipped with exciters and self-shunt excitation system. 1.4 BeljingTurb
11、ogenerator Ltd. Co. The original 200 MW generators also employ exciters； the 330 MW generators jointly produced with France based Alsthom Corp. are equipped with brushless excitation system, the domestication scheme of generators has passed the appraisal and examination, viewing from marketing, serf-shunt excitation can be provided as well. 2.1 Material quality etc. problems of slip ring Material quality of slip ring, ventilation, carbon powder, brush holder and its constant pressure spring etc. problems worried about in the past
