A method for heavy and overload monitoring of distribution network lines

Abstract

The invention relates to a method for monitoring heavy overload of distribution network lines. The ledger information such as the ampacity and length of the feeder section is derived from the PMS system; the ledger information is transmitted to the DMS system in the production control area of ​​the I district through the GOMS interface through the Ⅲ management information area; the analysis and calculation of the feeder sections of all lines in the DMS system , analyze and calculate the real-time carrying capacity, comprehensively rated carrying capacity, heavy overload duration, and set ratio to obtain heavy-load and overload feeder sections; classify heavy-overload feeder sections, and judge heavy-overload by combining the CT transformation ratio of the outlet switch in the substation Whether the feeder section is too small or the load within the power supply range is too large; handle different types of heavy load and overload situations in different ways; real-time visual alarm and display of heavy load and overload information; statistics of historical heavy overload information in different dimensions. The invention quickly inspects and monitors the heavy and overloaded feeder section, realizes the advanced analysis of the operation trend of the distribution network, and provides measures for proactively adopting preventive control.

Description

technical field [0001] The invention belongs to the field of electric power system automation, and in particular relates to a method for monitoring heavy and overload of distribution network lines. Background technique [0002] During the actual operation of the distribution network, due to grid maintenance or equipment failure, a special operation mode is required. Unplanned operation mode may cause the power equipment to be in a long-term heavy load and overload state. Abnormal operation will lead to equipment aging and affect the service life. If timely and effective measures are not taken, the situation will easily deteriorate, and may even lead to large-scale power outages. The existing fault research and judgment system of the DMS system only realizes heavy overload monitoring of feeder lines and distribution transformers in terms of heavy overload monitoring of lines, but lacks relatively sophisticated technical means in terms of wire sections and visual monitoring of...

AI Technical Summary

Problems solved by technology

[0002] During the actual operation of the distribution network, due to grid maintenance or equipment failure, a special operation mode is required, and the unplanned operation mode may cause the power equipment to be in a long-term heavy load and overload state

Abnormal operation will lead to equipment aging and affect the service life. If timely and effective measures are not taken, the situation will easily deteriorate, and may even cause large-scale power outages

The existing fault research and judgment system of the DMS system only realizes heavy overload monitoring of feeder lines and distribution transformers in terms of heavy overload monitoring of lines, but lacks relatively fine technical means in terms of wire sections and visual monitoring of branch lines. In addition, DMS research and judgment focuses on fault perception, In the application of positioning, there is a lack of auxiliary decision-making means for the whole process of fault isolation, load transfer and restoration of power transmission