Electricity transmission network reactor parameter estimation method in scheduling energy management system

Abstract

The invention provides a method for evaluating a reactance parameter of a transmission network in an energy dispatching management system. The method comprises the following steps: 1, acquiring an information output section of SCADA at a certain moment to start the evaluation of the reactance parameter of the transmission network in the energy dispatching management system; 2, carrying out pre-identification processing on remote sensing and remote signaling after a new section of information output of the SCADA system is acquired, and determining the data accuracy of the acquired section logically; 3, topologically searching according to the state of a disconnecting link of a power grid switch in each section of the SCADA system to generate each independent circuit and cycle basis group; 4, writing a loop measurement equation corresponding to each cycle basis, making each cycle basis group correspond to a group of loop measurement equations; and 5, adding the loop measurement equation corresponding to the cycle basis into the loop measurement equation group corresponding to the same cycle basis group if the rank is increased; switching to 1 if the cycle basis group which is not solved still exists; and continuing to acquire a new section of the SCADA until branch reactance parameters of all the cycle basis groups are evaluated and solved.

Description

technical field [0001] The invention relates to a method for estimating and releasing reactance parameters of a power system, which is suitable for completely estimating all series reactance parameters in a power transmission network in a dispatching energy management system. Background technique [0002] All kinds of advanced application software in dispatching energy management system, such as state estimation, dispatcher power flow, static security analysis, dynamic security analysis, optimal power flow, etc., all require that the given grid parameters are basically correct. The parameters of power grid equipment are basically given separately by typical values ​​or measured values ​​before the equipment is powered on. Due to the large number of power transmission equipment in the power grid, the huge time span for inputting equipment modeling parameters, the conversion of per unit value and famous value, and equipment database management, etc., there will always be more ...

AI Technical Summary

Problems solved by technology

These parameter estimation methods all assume that there are only a small number of parameter errors in the power grid. It is necessary to perform parameter identification first, find the position of the wrong parameters in the power grid, and then perform parameter estimation. The original parameters of the power grid need to be used in the parameter estimation process, and full parameter estimation cannot be realized.

In fact, it is very difficult to accurately identify wrong parameters when the full parameter estimation cannot be performed. In addition, the use of original parameters in the parameter estimation process is likely to cause errors in the estimation results.

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