Self-adaptive protection method, device and system

Abstract

The embodiment of the invention provides a self-adaptive protection method, device and system. The method comprises the following steps: acquiring working current and drain current of a power distribution loop at each moment in the preset time slot, and the maximum current value and the maximum drain current value of the power distribution loop in the preset time slot; determining to obtain a self-adaptive protection setting value of the power distribution loop according to the maximum current value and the maximum drain current value of the power distribution loop in the preset time slot; determining whether to start a self-adaptive protection mode, if determining to start the self-adaptive protection mode, configuring the self-adaptive protection setting value of the power distribution loop to a local and / or remote self-adaptive protection system corresponding to the power distribution loop. The protection setting value of the power distribution loop can be online modified in real time, thereby effectively solving the problem that a circuit breaker is in malfunction, fails to actuate, is delay in action, and is in electric leakage false alarm; the sensitive and reliable protection on the power distribution loop is realized, the power distribution loop is always in an optimal protection state, and the security and the reliability of the power distribution system are obviouslyimproved.

Description

technical field [0001] The invention belongs to the technical field of electric power protection, and in particular relates to an adaptive protection method, device and system. Background technique [0002] Short-circuit protection, overload protection and leakage protection are the basis to ensure the continuous operation of the power distribution system and the safety of power consumption, and to protect the safety of electrical equipment and personal safety. However, in the actual power distribution system, there are problems such as poor matching of cable specifications and circuit breakers, The user's actual power consumption current is much smaller than the design current, etc., and it is difficult for the user to adjust the protection setting value of the circuit breaker. Usually the protection setting value is not necessarily the best protection setting value, and with the distribution circuit operation, as well as the increase or decrease of electrical equipment, th...

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Problems solved by technology

[0003] In order to solve the above problems, the embodiment of the present invention provides an adaptive protection method, device and system, which can correct the protection setting value of the power distribution circuit on-line in real time, and effectively solve the problems caused by the mismatch between the circuit breaker and the cable and the default protection of the circuit breaker. Unreasonable setting value, on-site fault current greater than overload current value but less than short circuit protection setting current The electrical circuit is always in the best protection state, which significantly improves the safety and reliability of the power distribution system

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