Method for identifying and estimating power transmission line parameters based on SCADA (Supervisory Control and Data Acquisition) measurement data

The invention discloses a method for identifying and estimating power transmission line parameters based on SCADA (Supervisory Control and Data Acquisition) measurement data, belonging to the technical field of identification and estimation of the power transmission line parameters. The method comprises the following steps of: firstly inputting basic data of an identified and estimated power transmission line through a program by using a computer and data acquiring devices arranged at two ends of the power transmission line; and calculating an index T and judging error parameters according to the SCADA measurement data of the two ends of the line in a plurality of time buckets, thereby obtaining estimation values of correct parameters of the line. The method disclosed by the invention has the characteristics of simpleness, low requirements on original data, good identification effect, high estimation precision, strong engineering practicability and convenience for popularization and application. The method disclosed by the invention can be widely applied to identification and estimation of concentrated parameters of the power transmission line which is provided with an SCADA device on two ends respectively, and especially applied to identification and estimation of the concentrated parameters of the power transmission line without a PMU (Phasor Measurement Unit) device.