Fault positioning method for power distribution network by combining simulation calculation and real-time monitoring

Abstract

The invention discloses a fault positioning method for a power distribution network by combining simulation calculation and real-time monitoring, and belongs to the technical field of fault detection of the power distribution network. The method comprises the following steps of: extracting information of a target power distribution network from the conventional power distribution network geographic information system and a power distribution network energy management system through an organizational data analysis interface to automatically generate a real-time simulation calculation model of the target network; putting forward a virtual node-based fault positioning algorithm according to the simulation calculation model so as to solve functional relation between voltage amplitude of any node and a fault position parameter when a symmetric and asymmetric fault occurs at any point in the target network; and finally calculating an accurate position of the actual fault of the power distribution network by using a small amount of real-time data of voltage drop amplitude in a fault process. By using the fault positioning method for the power distribution network by combining the simulation calculation and the real-time monitoring, the state and the parameter of the network are accurately and effectively reflected when the fault occurs, the accuracy of the fault positioning is improved, and the method is suitable for various network structures and fault types.

Description

technical field [0001] The invention belongs to the technical field of distribution network fault detection, and in particular relates to a distribution network fault location method combining simulation calculation and real-time monitoring. Background technique [0002] The power system distribution network has a large number of feeders, a wide range of power supply, and a huge number of equipment. When a line fails, not only the loss is great, but also the troubleshooting of the fault point is very difficult. Especially in the urban distribution network, the buried cable power supply method is widely used, which increases the difficulty of investigation. Realizing fast and accurate location of distribution network fault points has always been an urgent need of the power production management department, and it is also a long-term research hotspot for relevant researchers. [0003] When the automation level is not high, generally only the circuit breaker of the substation...

AI Technical Summary

Problems solved by technology

However, the common problem of these methods is that most of the key action thresholds are basically calculated offline, and it is difficult to make adaptive adjustments according to the current network operation mode and load conditions.

Especially in the judgment of single-phase ground fault, there are a large number of missed and false alarms, and the actual operation effect is still not ideal

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