Automatic termination of asynchronous mode

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Section 3. Protection and automation

Automation and telemechanics. Automatic termination of asynchronous mode

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Encyclopedia of radio electronics and electrical engineering / Rules for the installation of electrical installations (PUE)

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3.3.75. To terminate the asynchronous mode (AR) in the event of its occurrence, automation devices should be mainly used that distinguish the asynchronous mode from synchronous swings, short circuits or other abnormal operating modes.

If possible, these devices should be designed so that they primarily contribute to the implementation of measures aimed at facilitating the conditions of resynchronization, for example:

rapid increase in load by turbines or partial disconnection of consumers (in the part of the power system in which there was a shortage of power);

reducing generating capacity by influencing turbine speed controllers or turning off part of the generators (in that part of the power system in which excess power has arisen).

Automatic separation of the power system at given points is applied after the occurrence of the AR, if the specified measures do not lead to resynchronization after passing the specified number of swing cycles, or if the duration of the asynchronous stroke is greater than the specified limit.

In cases of unacceptability of the asynchronous mode, danger or low efficiency of resynchronization, to terminate the AR, it is necessary to use the division with the shortest time, which ensures stability over other connections and selective action of automation.

See other articles Section Rules for the installation of electrical installations (PUE).

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