Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Frequency measurement method, device and system for pumped storage unit

A technology for pumped storage units and frequency measurement, which is applied to measuring devices, devices using electric/magnetic methods, linear/angular velocity measurement, etc., can solve problems such as different frequency requirements, ensure reliability and improve frequency measurement Reliability, effect of preventing false signals

Active Publication Date: 2014-08-27
STATE GRID CORP OF CHINA +2
View PDF1 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The purpose of the present invention is to propose a new frequency measurement method, device and system for pumped storage units to overcome the problem that the existing frequency measurement methods cannot meet the different frequency requirements of each stage of unit startup

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
  • Frequency measurement method, device and system for pumped storage unit
  • Frequency measurement method, device and system for pumped storage unit
  • Frequency measurement method, device and system for pumped storage unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] 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.

[0028] figure 1 It is a flow chart of a frequency measurement method for a pumped storage unit according to an embodiment of the present invention. Such as figure 1 As shown, the frequency measurement method of this embodiment includes: step S1, obtaining the control instructions of the pumped storage unit in different working modes, the working modes include the power generation mode in the direction of the turbine and the pumping mode in the direction of th...

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 invention provides a frequency measurement method, device and system for a pumped storage unit. The method comprises the steps of obtaining control instructions of the pumped storage unit in different working modes, wherein the working modes include the water turbine direction electricity generation module and the water pump direction water pumping mode; according to the control instructions and set selection logic, selecting PT frequency measurement or toothed disc frequency measurement at different stages in each working mode. According to the frequency measurement method, device and system for the pumped storage unit, the specific frequency measurement schemes and frequency measurement measures are adopted for a special working condition to avoid error signals, the exclusive frequency measurement schemes are developed particularly for the two special working conditions of SFC dragging and electric braking halt, and safe and reliable running of the unit is ensured; meanwhile, three probes are selected in the toothed disc frequency measurement scheme for frequency measurement, the real rotating speed of the unit can be given according to the health status and switching logic of the three probes, the confidence level of the toothed disc frequency measurement is ensured, and the frequency measurement reliability of the whole unit is improved.

Description

technical field [0001] The invention relates to the field of frequency measurement of a pumped storage unit, in particular to a frequency measurement method, device and system for a pumped storage unit. Background technique [0002] As the most important work of the speed control system, frequency measurement directly affects the safe and stable operation of the pumped storage unit, and also involves the control of auxiliary equipment. Therefore, frequency measurement has always been the core of the speed control system design. Currently, PT frequency measurement and sprocket frequency measurement are the most frequently used frequency measurement methods in conventional power stations. Among them, PT frequency measurement is to use the residual voltage signal of the voltage transformer at the machine terminal to be used for frequency measurement of the governor after being amplified. The toothed disc is a ring-shaped toothed device installed on the large shaft of the hydro...

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): G01P3/44G01P3/00
Inventor 周喜军周攀高翔秦俊马进潮邓磊吕滔周东岳
Owner STATE GRID CORP OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com