Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for analyzing damping characteristics of synchronous motor to system

A technology of synchronous motors and damping characteristics, which is applied in the direction of electrical components, circuit devices, AC network circuits, etc., can solve problems such as large limitations, limited converter capacity, and difficult implementation of control strategies, and achieve enhanced damping levels and unstoppable suppression The effect of stabilizing the problem

Active Publication Date: 2022-01-04
STATE GRID TIANJIN ELECTRIC POWER +1
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the above measures can alleviate the negative damping effect caused by a large number of power electronic devices to a certain extent, they have great limitations. Relying on the photovoltaic itself has inherent limitations in its reactive power adjustment capabilities, and it is impossible to achieve ultra-high proportion of new energy systems. Higher requirements on the damping level and more complex control strategies are not easy to realize in actual operation, and are limited by the capacity of the converter
[0005] To sum up, relying on the regulatory function of new energy itself cannot fundamentally solve the problem of weak damping in ultra-high proportion new energy systems, and new solutions need to be found

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 analyzing damping characteristics of synchronous motor to system
  • Method for analyzing damping characteristics of synchronous motor to system
  • Method for analyzing damping characteristics of synchronous motor to system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0070] Embodiment 2 of the present invention describes the derivation process of the formula in Embodiment 1 of the present invention;

[0071] Specifically, the MGP system consists of a synchronous motor and a synchronous generator, the rotors of which are connected to the same mechanical shaft. The structure of the new energy through the MGP system is as follows: figure 1 As shown, the electricity generated by new energy units such as wind turbines and photovoltaics is converged to drive a synchronous motor; the synchronous motor then drives a synchronous generator to generate electricity through a mechanical shaft, which is similar to a steam turbine-driven generator in a traditional thermal power plant; the synchronous generator converts mechanical energy into The electricity is then incorporated into the grid. Since the two motors of the MGP are connected by the same mechanical shaft, the rotors of the two synchronous motors will rotate at the same time, in the same dire...

Embodiment 3

[0117]The 5kW experimental platform established in this paper, in order to facilitate comparison with a single generator set, a DC motor is mechanically connected between the two AC synchronous motors of the MGP in the figure, and the three motors run coaxially. In MGP mode, the DC motor in the middle is idling and only acts as a mass block. The excitation windings of the AC synchronous motor M and the synchronous generator G are respectively connected to the 24V DC power supply. The AC synchronous motor M is driven by a frequency converter, and the power transformer The transmitter is used to measure the active power transmitted by the synchronous generator G to the grid, and the PLC is used for calculation and communication; in the single generator mode, the AC motor M is idling, and the excitation winding of the DC motor is powered by 21V DC power supply, and the AC generator G’s The excitation winding is connected to a 24V DC power supply, and the governor drives the DC mot...

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 method for analyzing damping characteristics of a synchronous motor to a system, and relates to the technical field of power simulation, and the method comprises the steps: constructing a small-interference state equation of an MGP system; obtaining a characteristic equation of the MGP system under interference based on the small interference state equation of the MGP system, and solving a characteristic value of the characteristic equation; and obtaining the damping ratio of the MGP system and the damping ratio of the single synchronous motor based on the characteristic equation. Through the method provided by the invention, a dynamic simulation model for small interference of the synchronous motor to the system (MGP) can be established to verify that the MGP system can effectively enhance the damping level of a new energy unit, so that the problem of instability is inhibited.

Description

technical field [0001] The invention relates to the technical field of electric power simulation, in particular to a method for analyzing the damping characteristics of a synchronous motor to a system. Background technique [0002] In the context of the depletion of fossil energy and the increasingly prominent environmental problems, vigorously developing new energy power generation to replace traditional thermal power plants has gradually become an effective measure for countries around the world to solve energy and environmental problems, and is regarded as an inevitable trend of future power development. With the cost reduction of wind power and photovoltaics and the rapid development of power electronics technology, the proportion of new energy in the power system is increasing rapidly. After a high proportion of new energy is connected to the grid, on the one hand, the random fluctuation of new energy brings instability to the power grid; on the other hand, more and mor...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24
CPCH02J3/241H02J2203/20
Inventor 张天宇徐晶丁承第刘聪武倩羽黄永章闫大威王魁罗涛赵海森雷铮李媛媛宋佳
Owner STATE GRID TIANJIN ELECTRIC POWER
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com