Method for measuring influence of voltage measurement time constant on dynamic stability of unit

A technology of time constant and voltage measurement, applied in the field of power system, to achieve strong engineering practicability and good robustness

Active Publication Date: 2021-06-15
CHINA ELECTRIC POWER RES INST +2
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The size of the voltage measurement time constant directly affects the excitation control speed, but there is no quantitative method to measure the influence of the voltage measurement time constant on the dy...

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
  • Method for measuring influence of voltage measurement time constant on dynamic stability of unit
  • Method for measuring influence of voltage measurement time constant on dynamic stability of unit
  • Method for measuring influence of voltage measurement time constant on dynamic stability of unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] Exemplary embodiments of the present invention will now be described with reference to the drawings; however, the present invention may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of exhaustively and completely disclosing the present invention. invention and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings do not limit the present invention. In the figures, the same units / elements are given the same reference numerals.

[0025] Unless otherwise specified, the terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it can be understood that terms defined by commonly used dictionaries should be understood to have consistent meanings in the context of their related fields, and should not be understood as idealized or over...

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 discloses a method for measuring the influence of a voltage measurement time constant on the dynamic stability of a unit, and belongs to the technical field of power systems. The method provided by the invention comprises the following steps: introducing additional difference adjustment into a Phillips-Heffron model of a single-machine infinite bus system, and determining a coefficient of the Phillips-Heffron model into which the additional difference adjustment is introduced; obtaining an excitation additional synchronous torque coefficient, a generator overall synchronous torque coefficient formula, an excitation additional damping torque coefficient and a generator overall damping torque coefficient formula; according to the expanded Phillips-Heffron model, obtaining the system oscillation frequency; and quantizing the influence of the voltage measurement time constant on the dynamic stability of the self-shunt excitation unit according to the synchronous torque coefficient and the damping torque coefficient increment. The deduced synchronous torque formula is simple and effective on the basis of the extended Phillips-Heffron model and the characteristic value of the characteristic equation of the model, and the method is suitable for practical engineering application.

Description

technical field [0001] The invention relates to the technical field of electric power system, and more specifically, relates to a method for measuring the influence of voltage measurement time constant on the dynamic stability of a unit. Background technique [0002] With the development of UHV AC-DC large-scale interconnected power systems, the safe and stable operation of power systems is becoming increasingly important. The generator excitation system plays a very significant role in ensuring the stability of system voltage and reactive power. Now most large power plants are wired for generator transformers way, and the high-voltage side of the main transformer is connected in parallel to the same busbar, so if the excitation voltage of a unit in the same power plant changes, it will not only change the reactive power and voltage of the unit, but also affect the performance of other units operating in parallel. Reactive power, which causes changes in the bus voltage, most...

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): H02J3/24G01R31/34
CPCH02J3/241G01R31/34H02J2203/20
Inventor 霍承祥武朝强高磊安宁朱艳卿孙华东杨超郭强李照庭吴剑超
Owner CHINA ELECTRIC POWER RES INST
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