An Intelligent Distributed Feeder Automation Method Based on State Quantities

Abstract

The invention discloses an intelligent distributed feeder automation method based on state variables, which relates to the field of power system. The method comprises the following steps: the positivedirection of current is specified; whether the operation mode of the system is an open-loop or a closed-loop operation mode is determined; each terminal calculates a current state variable; each terminal sends the current state variable, and receives the current state variables of other terminals in the left and right neighborhoods subscribed; each feeder terminal unit makes judgment by using a preset equation set 1 and a preset equation set 2, and makes an opening action if the terminal unit satisfies any equation set; a distribution terminal unit makes judgment by using the preset equationset 1 and a preset equation set 3, and makes an opening action if the terminal unit satisfies any equation set. By using the intelligent distributed feeder automation method based on state variables provided by the invention, normal operation, internal faults and external faults can be correctly distinguished, and quick removal of a fault section and fault isolation can be completed. The intelligent distributed feeder automation method based on state variables is suitable for a multi-terminal powered distribution network operating in an open-loop or closed-loop mode, does not require samplingsynchronization of terminals and characteristic consistency of mutual inductors, and has the advantages of wide applicability.

Description

technical field [0001] The invention relates to a feeder automation of a medium-voltage distribution network system, in particular to an intelligent distributed feeder automation method based on state quantities. Background technique [0002] At present, in the medium voltage distribution network system, the network wiring is complicated, there are overhead distribution network, cable distribution network, overhead and cable mixed distribution network, etc., the operation mode has open-loop operation or closed-loop operation, etc., the system structure is diverse and Complicated, resulting in complicated terminal feeder automation criteria, which are only applicable to a specific system wiring and operation mode, and cannot be universally applicable. [0003] Intelligent distributed feeder automation is to realize the fault location, isolation and automatic restoration of power supply in non-fault areas through the mutual communication between distribution terminals, and rep...

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