Method and device for dealing with power grid state estimation problems

Abstract

The invention discloses a method for dealing with power grid state estimation problems. The method comprises the steps of acquiring power grid operating data; detecting the quality of the acquired power grid operating data to form three levels of additional weight including measurement level, station level and region level, and carrying out superposition on the three levels of additional weight and the initial calculation weight of state estimation measurement data to form the dynamic weight of the state estimation measured data; modifying the initial calculation weight of the state estimation measured data according to a modification state of the dynamic weight, and carrying out state estimation again; and judging the categories of the current state estimation problems, and starting a preset process for dealing with the problems. Due to the reasonable weight set, the accuracy and the credibility of state estimation results are greatly improved; on the basis that the state estimation problems are classified, all the categories of problems are dealt with by the preset process with pertinence, so that the pertinence and the efficiency of the work of operation maintenance workers are improved, and the measurement data quality improvement speed is increased.

Description

technical field [0001] The present invention relates to the technical field of power grid state estimation, in particular to a processing method for power grid state estimation problems and a processing device for power grid state estimation problems. Background technique [0002] The quality of the basic data of power grid operation directly determines the practical level of various advanced analyzes and applications in the power dispatching control center, and also seriously affects the accuracy, reliability and leanness of power dispatching control. The basic data of power grid operation mainly includes models, parameters, measurement data and other parts, each of which will have a direct impact on its quality; operation and maintenance experience shows that the problem of power grid operation measurement data is an important factor affecting the accuracy of state estimation results. [0003] State estimation is the main method used in the industry to solve the problem of...

AI Technical Summary

Problems solved by technology

[0004] Among the above state estimation algorithms, the WLS method is the most widely used in engineering and has played an important role in improving the accuracy of power grid operation data; however, this method is very sensitive to the quality of measurement data and calculation weights. When the difference or its calculation weight setting is unreasonable, the measurement data estimation results obtained by this method will become unreliable

At present, the WLS method uses static calculation weights or manual modification. The set calculation weights cannot effectively reflect the quality of the measurement data and its dynamic changes, which reduces the accuracy and credibility of the estimation results of the method to a certain extent.

In addition, there is still a lack of reliable processing procedures for the problems existing in state estimation, which greatly affects the work efficiency of operation and maintenance personnel and the speed of improving the quality of measurement data

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