对国内外发电机监测与诊断系统的发展现状进行了分析汇总.随着电子与计算机技术的发展,国内外对发电设备进行开发应用,推动了在线监测和智能诊断技术的发展,并积累了一定的运行经验和维护资料.该综述可为自主开发发电机在线监测与诊断系统提供参考.

自并励静止励磁系统是国内大型汽轮机组常采用的励磁系统之一,其励磁电源取自机端电压.然而国内外电力系统稳定研究采用的励磁标准模型中忽略了机端电压对励磁电源的影响,在机端电压发生大幅跌落时,采用励磁系统标准模型可能无法准确反映励磁电压以及机端电压的动态特性.本文对自并励静止励磁系统标准模型进行修正,考虑励磁功率单元和灭磁系统的动态特性,建立更为完善的电磁暂态模型,即自并励静止励磁系统精细模型,并通过算例对其进行功能性仿真,验证了精细模型的正确性.

用于电力系统暂态稳定研究的励磁系统传递函数模型简化了功率单元和励磁电源,无法满足准确分析暂态稳定问题和励磁装置特性的需求。考虑功率单元和励磁电源以及励磁装置灭磁特性,提出更为完善的自并励静止励磁系统精细模型,在PSCAD/EMTDC中建立电磁暂态仿真模型,分析机端故障对电力系统暂态稳定以及励磁装置特性的影响。仿真结果表明,在发生近机端较严重的接地故障时,采用自并励静止励磁系统精细模型对电力系统暂态稳定以及励磁装置特性进行分析是十分必要的。

The software of NUMECA was utilized to numerically simulate the fan’s flow characteristics of the 660 MW Turbo-generator produced by Shanghai Genera-tor Plant, the distributions of pressure and speed of the fan under the designed condition were gained, as well as the characteristics and efficiency curve of the fan. Under the designed condition, the simulated results were close to the type tests results in the factory, proving that the calculated results were rather reliable.

The application of static frequency converter(SFC) in gas turbine set was introduced.The working principal,components,transfer function and starting process of SFC were analyzed based on the technology parameters of introduced Siemens gas turbine and existing SFC in current project.

In recent years,several dozen Gas Turbine(GT)generator sets have been imported into China.The generator of the GT generator set is applied as the starter which is controlled by the Static Frequency Converter(SFC).Unfortunately,the SFC provides output voltage and current wave forms of a poor quality and consequently low torque and efficiency due to using Silicon Control Rectifier(SCR)for the converter design,which cannot meet the requirements of the relevant state standard.To solve this problem a new converter is designed using IGBT instead of SCR.Test results show that with the new converter using IGBT perfect output waves can be obtained.Its performance is better than that of the converter with SFC and can fully meet the relevant state standard.

This paper mainly studies the de-excitation and over-voltage protection of a large turbogenerator with capacity over a million kilowatts. The selection of the main circuit and parameters of key elements are presented. The two alternatives of de-excitation resistor, ZnO nonlinear resistor and linear resistor, are compared and recommendable conclusions are given.

介绍了上海电气集团公司引进的配V94.3A型单轴燃气轮机的汽轮发电机的结构、主要性能参数和辅助系统特点等基本情况.

The technical code, performance features, main structure features, and features of the auxiliary systems of the THDF 108/53 turbogenerator produced by Shanghai Electric Group Company Ltd. according to the technology introduced from Siemens are recommendated. The recommendations are however also focussed upon the variable frequency start-up mode and the system structure of the F class gas turbine generator. The THDF 108/53 type generator is a turbogenerator selected to be fitted to the F class tandem compound gas turbine generating unit and distinguished for its excellent performance and its conformity with the requirements of both the international and local standards.