Load parameter identification device and method for electric power system station terminal

Abstract

The invention relates to a load parameter identification device and method for an electric power system station terminal. The method comprises steps that 1), voltage and current signals of a power grid secondary loop are acquired in real time, after the acquired voltage and current signals are converted and filtered, discrete sampling is carried out to acquire original sampling values of the voltage and current signals; 2), the open state information of the power grid secondary loop is acquired in real time, after anti-shaking and discrimination of the acquired open state information are carried out, the information is converted into a digital signal, and the opening and closing state information of a line switch is acquired for man-machine interface display; 3), phasor calculation and load parameter identification are carried out according to the original sampling values of the voltage and current signals to acquire the phasor calculation result and the load parameter identification result; and 4), the opening and closing state information of the step 2) and the phasor data and the load model identification result acquired in the step 3) are displayed through a man-machine interface and are uploaded to a main scheduling station.

Description

technical field [0001] The invention belongs to the technical field of dynamic monitoring of power systems, and in particular relates to a load parameter identification device and method at a station end of a power system. Background technique [0002] The power system model is very important to the simulation analysis and calculation of power system operation, and the modeling of its load parameters plays a key role in the application of the power system model. Different load models and parameters are selected, and there are differences in the dynamic response results in the simulation analysis of the power system, and even affect the judgment of the stability of the power system. To analyze different power system stability problems, the requirements for load models are also different. Different load models that meet the actual load position, composition, structure and other conditions must be established according to the application purpose of the load model and the specif...

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Problems solved by technology

Finally, even if only considering the load model structure composed entirely of induction motors and static loads, the existing research has not considered the diversity problem caused by different parameters under the same model structure and the diversity of loads after passing through the transfer reactance. aggregation problem

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