Three-phase load flow state estimation method of power distribution network

Abstract

The invention relates to a three-phase load flow state estimation method of a power distribution network. The method includes: (1) reading model data and transmission sections of the power distribution network, performing topological identification on the power distribution network to obtain a network topological structure of the power distribution network, and measuring each measuring point in the power distribution network to obtain data measurement values; (2) respectively computing three-phase load flows of the power distribution network according to the network topological structure to obtain a data computation value of each measuring point of the power distribution network; and (3) identifying according to residual between every data computation value and the data measurement value of the corresponding measuring point thereof, judging whether the data measurement values are bad data or not, if yes, correcting the data measurement values by the data computation values, and then analyzing and computing the power distribution network. By the state estimation method, good state estimation results can be obtained, and actual running requirements of the power distribution network can be met basically.

Description

technical field [0001] The invention relates to a method for estimating the three-phase power flow state of a distribution network. Background technique [0002] With the development of distribution network automation, due to the errors of measuring devices, errors caused by various links in the transmission process, and restrictions on the number or types of measuring device configurations, some data collected by the distribution automation system have errors, Incomplete, not completely reliable and so on. These inaccurate data cannot be directly applied to the analysis and calculation of the power distribution system, and state estimation is needed to improve the reliability and integrity of the data. However, the existing state estimation methods usually cannot obtain good state estimation results, especially in some key locations, the results that are consistent with the actual power flow cannot be obtained, which makes it unable to meet the actual operation needs of th...

AI Technical Summary

Problems solved by technology

However, the existing state estimation methods usually cannot achieve good state estimation results, especially in some key locations, the results that are consistent with the actual power flow cannot be obtained, which makes it unable to meet the needs of the actual operation of the power grid.