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Field loss protection static-stability low-impedance drop line boundary simulation method and system

A technology of loss-of-excitation protection and simulation method, which is applied to emergency protection circuit devices, electrical components, etc., to achieve the effects of convenient setting, high bridging accuracy and simple realization.

Active Publication Date: 2021-06-25
NANJING GUODIAN NANZI WEIMEIDE AUTOMATION CO LTD
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Problems solved by technology

[0003] The present invention provides a method and system for simulating the statically stable low-impedance drip line boundary of demagnetization protection, which solves the problems disclosed in the background technology

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  • Field loss protection static-stability low-impedance drop line boundary simulation method and system
  • Field loss protection static-stability low-impedance drop line boundary simulation method and system
  • Field loss protection static-stability low-impedance drop line boundary simulation method and system

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Embodiment Construction

[0069] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0070] Such as figure 1 As shown, the method for statically stable low-impedance drip line boundary simulation for demagnetization protection includes the following steps:

[0071] Step 1. According to the ratio of the direct-axis synchronous reactance of the generator to the quadrature-axis synchronous reactance of the generator, the starting angle in the positive direction of the Y-axis of the impedance plane, the ending angle of the negative direction of the Y-axis and the deflection of the boundary of the simulated drop line are obtained from the empirical parameter table. Move the center of the circle to locate the index.

[0072] The empirical parameter table is the recommended empirical...

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Abstract

The invention discloses a field loss protection static-stability low-impedance drop line boundary simulation method and system. The method comprises the steps of calculating an offset circle of a starting position and an end position through parameters, obtaining a changing impedance angle in real time, calculating an offset circle corresponding to the real-time impedance angle, tracking the timely change of the impedance angle through the offset circle, and achieving the simulation of the drop line boundary. The method is easy to implement, convenient to set, free of point extraction interpolation, small in calculation amount, smooth in action boundary and high in bridging precision of the drop line boundary.

Description

technical field [0001] The invention relates to a method and a system for simulating a statically stable low-impedance drip line boundary for demagnetization protection, belonging to the field of demagnetization protection. Background technique [0002] The electrical structure of the hydraulic generator is different from that of the thermal generator, which determines that the statically stable low-impedance boundary of the hydro-generator demagnetization protection is not an offset circle, but a drop-shaped boundary. The current demagnetization protection of the hydro-generator There are two methods for statically stable low-impedance boundary simulation: 1. Use the same offset circular impedance boundary as the thermal generator to simulate instead, which will inevitably bring some actual deviations; 2. Use the method of snapshot interpolation to simulate and realize The drop-line impedance boundary, in theory, the sampling point interpolation method to simulate the drop-...

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Application Information

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IPC IPC(8): H02H7/06
CPCH02H7/065
Inventor 刘万斌刘小波丁俊健
Owner NANJING GUODIAN NANZI WEIMEIDE AUTOMATION CO LTD
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