Dynamic model test method for distribution network self-healing control function

Abstract

The invention provides a movable mould test method for a self-healing control function of a power distribution network. The method comprises the following steps: setting a state sequence on a relay tester, and determining a fault strategy; triggering the fault strategy according to set time through GPS signals by use of a movable mould tester, the movable mould tester being connected with the terminal row of an intelligent control terminal of the power distribution network for simulating a primary switch device; obtaining remote signaling information returned by the movable mould tester; starting the self-healing control of the power distribution network, controlling the corresponding switch of the power distribution network to isolate a fault within a minimum scope, and restoring power supply to other areas whose power is cut off due to the fault reason; and according to the remote signaling information and the remote measuring information of all switches in a fault area, determining a test result. By applying the technology provided by the invention, the technical difficulty of simulation of fault currents, which is generated at the time when devices are distributed in a cross-region mode, is solved, the dynamic simulation testing of an online operation system is realized, the test reliability is high, the repeatability is high, the method is simple and easily implemented, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of electric power engineering, in particular to a dynamic model test method for the self-healing control function of a distribution network. Background technique [0002] The essence of traditional power distribution system current protection is an independent unit protection. It only detects the current flowing through the monitored switch to determine whether the protection operates or not and the action delay, and does not care about the protection action of adjacent switches. This is the main reason for the difficulty in coordinating adjacent protections. If the scope of protection monitoring is expanded from one point to a group of connected switches or even a group of switches connected in series, the coordination of upper and lower level protection can be understood as the internal coordination of protection. With the development of modern computer technology and network technology, it is possible to...

AI Technical Summary

Problems solved by technology

[0003] The on-site actual simulation test of the self-healing control function of the distribution network cannot be carried out due to the need to change the power supply mode or power failure

There are many links in the transmission test of the whole group, and because the tested objects are distributed across regions (generally up to several kilometers, tens of kilometers, etc.), it is difficult to test the Whether the operation is accurate when dealing with various failures, it is impossible to judge whether the operation conforms to the predetermined logic

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