Abstract
The main reasons for the adoption of automatic control techniques in power systems are given and the position on their application to the British Grid system is stated. The behaviour of speed governors in amanually controlled system, leading to the development of the electrical governor, is discussed, and a Swedish governor of this type is described. The need for mixed power-frequency control and the merits of frequency-bias tie-line control are discussed. A distinctionis drawn between automatic control which only trims manual load dispatching and fully automatic loading schemes. The necessary elements of an automatic control are next mentioned, and as examples of precision frequency meters, British and German developments are described. Alternative methods of achieving desired participation inregulation are mentioned, and particulars are given of a scheme developed in Britain, including details of the machine controllers and system controller. Some test results are give.Finally the use of system simulators is mentioned and British and German simulators are described.
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