VOLTAGE STABILISER FOR ASYNCHRONOUS GENERATORS FOR SELF-CONTAINED POWER SUPPLIES, WIND DRIVEN POWER PLANTS, SMALL HYDROELECTRIC POWER STATIONS Russian patent published in 2009 - IPC H02P9/46 

FIELD: electrical engineering.

SUBSTANCE: device relates to electrical engineering and can be used for stabilising voltage of asynchronous generators, used in self-contained power supplies, wind driven power plants and small hydroelectric power stations. The novelty of the engineering solution results from further use of three discrete excitation controllers, each with a control circuit and electronic switches in form of optoelectronic single-phase alternating current relays with phase control of commutation voltage through "zero", for example "5П19.10ТМ". Primary windings of each single-phase transformer have at least one tap. The first terminals of primary windings and first terminals of secondary windings of these transformers are connected to terminals of the asynchronous generator. Second terminals of secondary windings are connected to excitation capacitors. Second terminals of primary windings and their taps, through electronic switches, are connected to the neutral terminal of the asynchronous generator and with the neutral terminal of the excitation capacitors. The control circuit of discrete controllers consists of series-connected rectifier for measuring amplitude of mains voltage and controlling transition of the sinusoid through zero, voltage comparator and logic comparator. Inputs of the optoelectronic single-phase relays are connected to the output of the rectifier and logic comparator.

EFFECT: simplification of control circuit and higher quality of output voltage.

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