Relay protection setting method and system based on graphical power distribution network

Abstract

The invention discloses a relay protection setting method and system based on a graphical power distribution network. The relay protection setting method sequentially comprises the following steps of: converting data in a PMS (Power Management System) into a power grid topological graph, carrying out drawing of a graph block, acquiring a running state of a power system in real time, and carrying out online setting calculation and regulation on a value of a relay protection fixed value setting device; and then by a user, according to requirements of the user or the field, bringing the data into a power system model to carry out relay protection fixed value calculation of the power distribution network. According to the relay protection setting system based on the graphical power distribution network, a PMS data conversion device, a graphical configuration modeling device, a relay protection configuration device and the relay protection fixed value setting device are all connected with a relay protection fixed value management device. The relay protection setting method and system based on the graphical power distribution network have the advantages that the relay protection setting method and system are more convenient and rapid, and are convenient to manage; according to a power grid connection topological structural model and a power grid functional position model, description of a power grid circuit connection graph and calculation of a short circuit fault are carried out; and security of the data is effectively ensured.

Description

technical field [0001] The invention relates to a graphical distribution network-based relay protection setting method and system. Background technique [0002] With the rapid development of the power system, the safe operation of the power system plays a very important role in the power system. When the system causes a fault or abnormal state somewhere in the power grid due to natural, man-made or equipment failure, the relay protection device can quickly remove the faulty part, avoid the expansion of the fault hazard, and reduce the possible loss. Reduced to a minimum to ensure the stability of the power system operation and to maximize the non-faulty part of the grid to continue to provide reliable power. In modern power systems, relay protection is an indispensable and important part. With the development of the power system, the requirements for relay protection are getting higher and higher. In order to ensure the safe and stable operation of the power system, vario...

AI Technical Summary

Problems solved by technology

However, in the face of increasingly complex power systems, various setting calculation software have shown certain limitations to varying degrees.

In recent years, although new theories and methods such as expert systems have also been used to improve the setting calculation software, it is still difficult to completely overcome the inherent shortcomings of the setting calculation software.

In some cases, the setting value given by the setting calculation software may not be reasonable enough

For the power system, this is very dangerous. Once a fault occurs, whether the setting value of the protection device is accurate and reasonable must be verified after the actual system fault. Stable operation brings certain risks. On the other hand, considering the important position of the power industry in the entire national economy, it is impossible to actively conduct experiments in the real system to avoid undue harm to the system operation.