초록 ▼

A method of generating a protection-triggering signal using a triggering device of a selective-protective arrangement for an electrical power network to be monitored. In order to produce a protection-triggering signal in a relatively short time after the occurrence of a fault in the power network, a

A method of generating a protection-triggering signal using a triggering device of a selective-protective arrangement for an electrical power network to be monitored. In order to produce a protection-triggering signal in a relatively short time after the occurrence of a fault in the power network, a triggering device is provided in which a neural network is associated with each phase conductor in the power network. Successively sampled normalized values of the current in the power network are applied at the same time to the various neurons in the input layer of each neural network and a subsequently sampled normalized value (comparison value) of the current compared with the signal from the output neuron. If the normalized comparison value exceeds the output from the output neuron, a protection-triggering signal is generated.

대표청구항 ▼

[ I claim:] [10.] A method for detecting an overcurrent in a phase conductor comprising the steps of:successively sampling a current in the phase conductor to obtain a plurality of successive current values;simultaneously applying each of the plurality of successive current values to respective inpu

[ I claim:] [10.] A method for detecting an overcurrent in a phase conductor comprising the steps of:successively sampling a current in the phase conductor to obtain a plurality of successive current values;simultaneously applying each of the plurality of successive current values to respective inputs of a neural network having a plurality of inputs, the neural network providing an output value at an output in response thereto;sampling the current in the phase conductor to obtain a comparison current value, the comparison current value sampled subsequently to obtaining the plurality of successive current values;comparing the comparison current value to the output value at the neural network output; andgenerating a protection-triggering signal if said comparison current value deviates from the output value in a predetermined manner.