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Method system for determining power angle in real time

A determination method and a technology for determining modules, applied in the field of power systems, can solve problems such as large calculation errors, and achieve the effect of improving accuracy

Active Publication Date: 2019-12-31
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing power angle measurement method is based on the assumption that the potential amplitudes on both sides are equal. When the potential amplitudes on both sides are not equal, the calculation error is large

Method used

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  • Method system for determining power angle in real time
  • Method system for determining power angle in real time
  • Method system for determining power angle in real time

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Embodiment Construction

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0048] The purpose of the present invention is to provide a real-time determination method and system for the power angle, so as to improve the accuracy of the power angle.

[0049] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0050] The existing power angle measur...

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Abstract

The invention discloses a method and system for determining a power angle in real time, and the method comprises the following steps of obtaining a first voltage and a first current of a bus M and a second voltage and a second current of a bus N, determining the potential on the M side of the system bus according to the first voltage and the first current, determining the potential on the N side of the system bus according to the second voltage and the second current, determining the voltage at the lowest voltage point as a third voltage according to the first voltage, and determining the magnitude of the first potential amplitude and the second potential amplitude to obtain a determination result; using a first power angle formula to determine the magnitude of the power angle if the determination result indicates that the first potential amplitude is greater than or equal to the second potential amplitude, and using a second power angle formula to determine the magnitude of the powerangle if the determination result indicates that the first potential amplitude is less than the second potential amplitude. According to the method provided by the invention, when the potentials on both sides of the equivalent dual power supply system are not equal, the power angle calculation formulas under different conditions are used to determine the power angle to improve the accuracy of thepower angle.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to a method and system for real-time determination of power angles. Background technique [0002] The power angle is an important parameter to characterize the stability of the power system. Many destructive accidents in the power system are attributed to the instability of the power angle of the generator under disturbance. In addition, the power angle plays an important role in state estimation, on-line stability analysis and control, out-of-step prediction protection, out-of-step separation, and distance protection oscillation blocking. Therefore, it is a continuous research topic to seek a reliable and accurate method to measure the power angle in real time, reflect the operating state of the system, predict, monitor, control and protect the power system, and improve the stability of the power system. [0003] In recent years, the wide-area measurement system (WAMS) based...

Claims

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Application Information

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IPC IPC(8): G01R31/34G01R25/00
CPCG01R25/00G01R31/343
Inventor 黄少锋李慧李轶凡徐泰来张月品伍叶凯赵月
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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