Hyperbolic tangent robust state estimation method

Abstract

The invention belongs to the electric power system scheduling automation field, especially relates to a hyperbolic tangent robust state estimation method. The hyperbolic tangent robust state estimation method comprises the steps that a hyperbolic tangent robust state estimation basic model is established, and by using a primal-dual interior point algorithm, the hyperbolic tangent robust state estimation is solved. The hyperbolic tangent robust state estimation method is advantageous in that strong robust performance and high calculation efficiency are provided, and leverage point adverse data is inhibited, and a good engineering application prospect is provided.

Description

technical field [0001] The invention belongs to the field of electric power system scheduling automation, and in particular relates to a hyperbolic tangent type robust state estimation method. Background technique [0002] Power system state estimation is the foundation and core of energy management systems. Now almost every large dispatch center has installed a state estimator, and state estimation has become the cornerstone of the safe operation of the power grid. Since state estimation was first proposed by foreign scholars in 1970, people have studied and applied state estimation for more than 40 years, and various state estimation methods have emerged during this period. [0003] At present, the most widely used state estimation at home and abroad is the weighted least squares (WLS) method. The WLS model is simple and easy to solve, but its robustness is poor. In order to enhance the tolerance, there are generally two methods. The first is to add bad data identifica...

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Problems solved by technology

However, the estimation performance of these robust state estimation methods still needs to be improved.

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