Electric power system emergency control method based on response information

Abstract

The invention relates to an electric power system emergency control method based on response information. Response of a generator, i.e., a power angle, an angle speed and imbalance moving kinetioity information, is detected by a wide area dynamic information system WAMS in real time, when the system is not stable, control quantity required by the system is calculated in real time. The method comprises steps that: 1, whether the system is stable is determined; 2, an unstable balance point of an equivalent single-machine infinity system is predicted, if the system has no unstable balance point, stepout instruction is emitted; 3, a target value of a first-order derivative k of the angle speed versus the power angle of the equivalent single-machine infinity system is calculated; 4, control quantity lambda of the equivalent single-machine infinity system is calculated; 5, control quantity delta Pm required by a multiple-machine system is calculated; and 6, generator cutting operation is carried out. Through the method, the response of the generator, i.e., the power angle, the angle speed and the imbalance moving kinetioity information, is detected by the wide area dynamic information system WAMS in real time, when the system is not stable, the control quantity required by the system can be calculated in real time, and a complex model of the system can be adapted to.

Description

technical field [0001] The invention belongs to the technical field of power system emergency control, and in particular relates to a response information-based power system emergency control method. Background technique [0002] The current power system stability prediction and emergency control devices are still based on the calculation of the grid model and parameters. When the model and parameters are mismatched, it is difficult to guarantee the correctness of the results. Facts have proved that it is difficult to accurately grasp the links that play an important role in the dynamic process such as the load characteristics of the large power grid and the adjustment system parameters. Stability prediction and control based on system response independent of system parameters and calculations has been the expectation for many years. With the gradual maturity of WAMS technology, it can be foreseen that in the near future various dynamics of units in the system can be obtaine...

AI Technical Summary

Problems solved by technology

[0002] The current power system stability prediction and emergency control devices are still based on the calculation of power grid models and parameters. When the models and parameters do not match, the correctness of the results is difficult to guarantee

Facts have proved that it is difficult to accurately grasp the links that play an important role in the dynamic process such as the load characteristics of the large power grid and the adjustment system parameters.

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