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

Adaptive virtual synchronous control system applied to direct-current power transmission system, and method

A DC transmission system, virtual synchronization technology, applied in the direction of power transmission AC network, reducing/preventing power oscillation, etc., can solve the problems of system damping reduction, stability reduction, and AC power grid frequency fluctuation intensification, etc., to slow down violent fluctuations, improve frequency, the effect of improving dynamic performance

Active Publication Date: 2018-11-23
HUNAN UNIV
View PDF4 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, it is necessary to address the above-mentioned problems and propose a virtual synchronization controller and method applied to the multi-terminal flexible DC transmission system to solve the aggravated frequency fluctuation of the AC power grid after being connected to the multi-terminal flexible DC transmission system. The problem of damping reduction and decreased stability

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
  • Adaptive virtual synchronous control system applied to direct-current power transmission system, and method
  • Adaptive virtual synchronous control system applied to direct-current power transmission system, and method
  • Adaptive virtual synchronous control system applied to direct-current power transmission system, and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0052] Such as figure 1 , Figure 5 As shown, a DC transmission system ( Figure 5 Briefly shows the circuit structure of the direct current transmission system, because part of the circuit structure of the direct current transmission system is the prior art, so the description will not be expanded), the direct current transmission system includes the converter station (the converter station stand at Figure 5 Marked as VSC in ), the virtual synchronous controller includes the following modules:

[0053] The parameter deviation acquisition module is used to collect the detection parameters of the converter station, and generate the frequency deviation Δω of the AC side bus of the converter station, the frequency change rate dω / dt of the AC side bus of the converter station, and the active power of the AC side bus of the converter station Power output deviation ΔP, voltage amplitude deviation Δ|Vac| of the AC side bus of the converter station, reactive power output deviation...

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 relates to the technical field of stability control of large power grids, and particularly discloses an adaptive virtual synchronous control system applied to a direct-current power transmission system. The adaptive virtual synchronous control system comprises a parameter deviation acquisition module, a parameter adaptive adjustment module, a virtual speed controller control module,a virtual synchronizer control module and a reactive power control module. The invention also discloses a control method for the adaptive virtual synchronous control system applied to the direct-current power transmission system, and the control method comprises the steps that S1, detection parameters are collected, and parameter deviation is generated; S2, the parameter deviation is sent; S3, theoscillation state of an alternating-current power grid on one side of a convertor station is judged; S4, the adjustment amount of the reference value of the output power of the converter station is generated; S5, a voltage phase angle signal of a bus on the alternating-current side of the converter station is generated; S6, a modulation ratio signal required by the converter station is generated;and S7, a PWM signal is generated. According to the adaptive virtual synchronous control system applied to the direct-current power transmission system, and the control method for the adaptive virtual synchronous control system applied to the direct-current power transmission system, the inertia level, overall stability and frequency stability of alternating-current and direct-current power gridsare improved, and power fluctuation and frequency fluctuation are reduced.

Description

technical field [0001] The invention relates to the technical field of large power grid stability control, in particular to an adaptive virtual synchronization control system and method applied to a direct current transmission system. Background technique [0002] In recent years, in order to increase energy supply, optimize energy structure and reduce environmental pollution, more and more renewable energy sources such as wind energy and solar energy have been applied to my country's power system. The utilization of renewable energy is a very important direction of smart grid construction. Among various types of renewable energy, wind energy has been developed with a relatively mature technology and has been applied to a certain extent in the power system. Currently, high-voltage direct current (HVDC, High-Voltage Direct Current) transmission technology is considered to be an effective way to connect large-scale wind farms with the main grid. Especially in terms of long-d...

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): H02J3/24H02J3/36
CPCH02J3/24H02J3/36Y02E60/60
Inventor 曹一家王炜宇谭益李勇
Owner HUNAN UNIV
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