Automatisation of compressor plants driven by synchronous motors
Abstract
Starting a synchronous motor may be performed both with full voltage and lowered voltage. Fig. 1 shows a principal scheme of connecting a synchronous motor whose starting is performed under full voltage; principal schemes of connecting synchronous motors whose starting is performed under lowered voltage are represented in Fig. 2 and 3, respectively for cases of starting by means of a reactor and autotransformer. The present paper examines automatic control operations in compressor plants driven by synchronous motors whose starting is performed under full voltage; automatic protection of these plants from treating troubles is also considered. A method of starting synchronous motors under full voltage being the simplest both in its operations and with regard to its starting equipment is likely to be extensively adopted in next future in the mines of USSR where stations and substations under certain conditions of their capacity will admit of directly connecting powerful compressor plants served by synchronous motors.
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References
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