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A Steady-state Frequency Prediction Method of Power System Considering Dead Zone Nonlinearity

A power system steady-state and frequency prediction technology, applied to electrical components, circuit devices, AC network circuits, etc., can solve the problems of not considering the role of the dead zone of the governor and inaccurate prediction results, so as to improve the accuracy of prediction , reduce calculation error, reduce the effect of calculation error

Active Publication Date: 2019-03-19
STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST +1
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Problems solved by technology

[0005] The invention provides a power system steady-state frequency prediction method considering dead zone nonlinearity, which solves the problem that the existing power system steady-state frequency prediction method does not consider the effect of the governor dead zone, resulting in inaccurate prediction results The technical problem of solving the technical problems has achieved the technical effect of reducing the error of steady-state frequency calculation and improving the accuracy of steady-state frequency prediction

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  • A Steady-state Frequency Prediction Method of Power System Considering Dead Zone Nonlinearity
  • A Steady-state Frequency Prediction Method of Power System Considering Dead Zone Nonlinearity
  • A Steady-state Frequency Prediction Method of Power System Considering Dead Zone Nonlinearity

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[0075] The invention provides a power system steady-state frequency prediction method considering dead zone nonlinearity, which solves the problem that the existing power system steady-state frequency prediction method does not consider the effect of the governor dead zone, resulting in inaccurate prediction results To solve the technical problems, the technical effect of reducing the error of steady-state frequency calculation and improving the accuracy of steady-state frequency prediction is achieved.

[0076] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, under the condition of not conflicting with each other, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0077] In the following des...

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Abstract

The invention discloses a power-system steady-state frequency prediction method taking dead zone nonlinearity into account. The method includes the steps: 1, obtaining parameters of related models; 2, simplifying governor-prime-motor models; 3, calculating a difference adjustment coefficient taking the dead zone nonlinearity into account; 4, calculating system steady-state frequency after disturbance. According to the method, the technical problem is solved that prediction results are inaccurate because current power-system steady-state frequency prediction methods do not take into account the influences of governor dead zones; errors of the steady-state frequency calculation are reduced, and the technical effect is achieved that the accuracy of steady-state frequency prediction is improved.

Description

technical field [0001] The invention relates to the field of power system simulation, in particular to a power system steady-state frequency prediction method considering dead zone nonlinearity. Background technique [0002] At present, in the steady-state frequency prediction method of the power system, the role of the dead zone of the governor is often ignored. The dead zone of the governor determines the extent to which the generator participates in primary frequency regulation. The smaller the dead zone, the faster the governor responds to the frequency deviation, and the faster the generator can be called for backup to suppress the frequency drop. On the other hand, in order to avoid mechanical wear caused by frequent adjustments, it is necessary to set a certain size of dead zone. Appropriate dead zone settings help maintain frequency stability and provide a reasonable governor response, and the primary frequency regulation capability of the power system also varies w...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00H02J3/24
CPCH02J3/00H02J3/24H02J2203/20
Inventor 滕予非张鹏范成围
Owner STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST
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