Frequency coordination control method specific to send-out islands of multiple direct current circuits

A DC line, frequency coordination technology, applied in the direction of reducing/preventing power oscillation, can solve problems such as a large number of cutting machines, and achieve the effect of high-efficiency frequency control means

Active Publication Date: 2017-03-22
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
View PDF4 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, after the multi-pole blocking fault of the DC system occurs, the system needs to cut off a large number of machines and cut off its supporting power supply

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 coordination control method specific to send-out islands of multiple direct current circuits
  • Frequency coordination control method specific to send-out islands of multiple direct current circuits
  • Frequency coordination control method specific to send-out islands of multiple direct current circuits

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0034] A frequency coordination control method for multiple direct current lines sending out islands, comprising the following steps:

[0035] (1) Obtain the real-time power value transmitted by each DC line in real time, and calculate the real-time modulated power of each DC line according to the overload capacity of the DC line. Among them, 1.0p.u. overload is used as the upper limit of power regulation for flexible DC transmission lines, and 1.2p.u. overload is used as the upper limit of power regulation for conventional DC transmission lines, where p.u.

[0036] (2) Judging whether unipolar blocking or bipolar blocking occurs in each DC line, if so, then perform step (3), otherwise, return to step (1);

[0037] (3) Judging whether the control channels corresponding to each return DC line are normal, if so, perform step (4), othe...

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 frequency coordination control method specific to send-out islands of multiple direct current circuits. When a system suffers from a single-pole or dual-pole direct current locking failure, emergency frequency control on an island power grid with severe faults is performed by adopting a direct current power improving instruction (RUNUP), a direct current frequency limiter (FLC) and control measures of performing primary frequency modulation on a generator speed regulator and performing steady control on power cutting in turns. The frequency coordination control method is applicable to a multi-loop direct current transmitting end system with a concentrated control main station.

Description

technical field [0001] The invention belongs to the technical field of safety and stability analysis of electric power systems, and in particular relates to a frequency coordination control method aiming at sending islands from multiple DC lines. Background technique [0002] The regional resource characteristics and unbalanced economic development of the Southern Power Grid determine that the Southern Power Grid needs to carry out west-to-east power transmission and cross-regional resource optimization for a long period of time. Yunnan is rich in hydropower resources. As the large-scale hydropower transmission base of the Southern Power Grid, with the continuous expansion of the power transmission scale, by 2016, after the Luxi DC back-to-back project and the ±500kV Yongren-Funing DC project are completed and put into operation, Yunnan Power Grid The 6-circuit direct current transmission system and the main grid of China Southern Power Grid are connected asynchronously. As...

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
CPCH02J3/24
Inventor 郭琦李伟韩伟强孙晓彦时伯年高鸿飞陈志民
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID 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