A 40,000-Kw. Variable-Ratio Frequency Converter Installation

Part I of this paper describes the installation of two 20,000-kw., adjustable load, variable-ratio, frequency converters interconnecting the 25-cycle and the 60-cycle systems of the Niagara, Lockport and Ontario Power Company at Lockport Substation about twenty miles from Niagara Falls and Buffalo, N. Y. It also explains the function of the various machines, points out the more important features of the control, and relates a few interesting incidents in the past eighteen months of operation. Part II describes and explains the characteristics of such a converter and, more intimately, the operation and design of the component apparatus, using rather generally known and understood analogies, comparisons, and simple physical conceptions without any mathematical analyses or difficult theoretical treatment.