H - Electricity – 02 – M
Patent
H - Electricity
02
M
321/22
H02M 5/42 (2006.01) H02J 3/36 (2006.01)
Patent
CA 1090881
Abstract of the Disclosure In the method of the invention, the rectifier at a rectifier station is voltage-controlled and the inverters at the inverter stations served by the rectifier station are current-controlled, More particularly, the reference input for the voltage controller of the rectifier is formed by means of a computer circuit on the basis of a fixed, predetermined current- voltage characteristic as a function of the respective, maximum possible current in the rectifier station. In turn, a maximum value is formed for the reference input of the current controller of each respective inverter by means of a computer circuit on the basis of a fixed, predetermined voltage-current characteristic matched to the current voltage characteristic and the output capacity of the rectifier station, as a function of the voltage in the DC network. The maximum value for the reference input of each inverter, in turn, is compared with a value for the reference input corres- ponding to the power demand of the respective inverter station in a minimum selection stage which releases the respective smaller value for the corres- ponding current controller. When employing the above-described method of the invention it is, thus, possible to guarantee that each inverter station receives a predetermined power which depends on the respective output capacity of the rectifier station.
250945
Erche Manfred
Filberich Ludwig
Povh Dusan
Waldmann Hermann
Weibelzahl Manfred
Aktiengesellschaft Siemens
Fetherstonhaugh & Co.
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