Load angle direct measurement method of hydroelectric synchronous machine

A technology of synchronous generator and measurement method, which is applied in the direction of motor generator testing, etc., to achieve the effect of convenient real-time calculation, convenient and fast solution, and avoiding modification

Active Publication Date: 2008-11-05
NARI TECH CO LTD +1
View PDF1 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in fact, due to the fact that a large number of gear plates of generator sets that have been put into operation have already been opened, and

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Load angle direct measurement method of hydroelectric synchronous machine
  • Load angle direct measurement method of hydroelectric synchronous machine
  • Load angle direct measurement method of hydroelectric synchronous machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] The following is a specific embodiment of the present invention, including a specific generator synchronized phasor measurement device realized by this method. Further features, objects and advantages of the method can also be seen from the description of the exemplary embodiments and the drawings.

[0034] From figure 2 It can be seen from the figure that the output terminal voltage of the generator is converted by the voltage / voltage converter 1 into a small-amplitude waveform signal and then sent to the analog-to-digital converter 4, and the stator current of the generator is converted by the current / voltage converter 2 into The small-amplitude waveform signal is also sent to the analog-to-digital converter 4, and the generator rotor position signal is converted into a pulse signal by the corresponding position sensor 3 and sent to the digital processing unit 5.

[0035] The analog-to-digital converter 4 receives the analog signal waveforms sent by the above-mentio...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The present invention discloses a method for directly measuring the power angle of a hydroelectric synchronous machine, wherein the method comprises the following steps: at the state that the generator is unloaded, obtaining a preliminary phase angle and a tooth pitch characteristic parameter of the fluted disc of the generator rotor by a PMU device through a sensor; when the generator is operated with load, matching the corresponding relationship between the preliminary phase angle sequence and the tooth pitch sequence through measuring the fluted disc characteristic and tooth pitch characteristic at this time; and calculating the real-time power angle through the matching relationship. The method according to the invention can measure the initiative error angle of the position signal of the generator and directly obtain an accurate power angle of generator at the state that the existing generator gear is not improved.

Description

technical field [0001] The invention relates to a method for directly measuring the power angle of a water wheel synchronous generator. Background technique [0002] The trend of the interconnection of major power grids in my country makes the monitoring of power grid security and stability particularly important. Since the generator power angle is an important state quantity that characterizes the safety and stability of the power grid, the Wide Area Measurement System (WAMS) and Synchronized Phasor Measurement Unit (PMU) constructed using synchronous clock technology have been widely promoted and applied in recent years. The more accurate method of measuring the power angle of the generator is: directly measure the position angle of the generator rotor in a certain space, so as to calculate the internal potential phase angle, and obtain it by the angle difference between the internal potential phase angle and the generator terminal voltage generator power angle. [0003]...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01R31/34
Inventor 丁孝华孙国城周捷杨永标赵景涛
Owner NARI TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap