Multi-DC feed-in receiving end power grid emergency control optimization method and system

A multi-DC feed-in, emergency control technology, applied to AC network circuits, electrical components, circuit devices, etc., can solve problems such as loss of load

Inactive Publication Date: 2019-11-01
HOHAI UNIV +1
View PDF3 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the DC power reaches the maximum increase rate, but the transient stability margin index still cannot meet the system requirements, part of the load will be lost

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
  • Multi-DC feed-in receiving end power grid emergency control optimization method and system
  • Multi-DC feed-in receiving end power grid emergency control optimization method and system
  • Multi-DC feed-in receiving end power grid emergency control optimization method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0065] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0066] Please refer to Figure 1 to Figure 3 ,among them figure 1 It is a schematic diagram of the overall module of the method and system for optimizing the emergency control of the multi-DC feed into the receiving end power grid of the present invention, figure 2 It is a schematic diagram of the transient stability margin index defined by the emergency control optimization method and system of the multi-DC feed-in receiving end grid of the present invention. image 3 It is a flowchart of the method for optimizing the emergency control of the multi-DC feed-in receiving end power grid in the present invention.

[0067] The emergency control optimization method of the multi-direct current feed-in receiving end power grid of the present invention is ba...

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 a multi-DC feed-in receiving end power grid emergency control optimization method and system. For a transient voltage and frequency stability problem caused by DC blocking andother faults in a multi-DC feed-in receiving end power grid, DC power support, energy storage device emergency power boosting and pumped storage power station pump shedding and load shedding methodsare adopted to coordinately control the transient voltage and frequency stability of the receiving end power grid. Based on the simulation trajectory of the voltage and frequency of the receiving endpower grid after faults, a transient stability margin index is defined by a numerical integration method, the perturbation method is utilized, and a trajectory sensitivity matrix of the control quantity is calculated. The local linearization method is utilized to transform an original nonlinear transient stability control problem into a linear programming problem, through successive iteration, theoptimal control quantity is obtained.

Description

Technical field [0001] The invention relates to the technical field of transient stability emergency control of power systems, and in particular to a method and system for optimizing emergency control of a multi-DC feed-in receiving end power grid based on sensitivity analysis. Background technique [0002] my country's natural resources show a "reverse distribution". Energy in the northwest and southwest regions is transported to the load center in the east through long-distance and UHV. With the development of UHV DC year by year, the proportion of external DC power receiving in the east is increasing. UHV DC is a non-inertia power source. The replacement of conventional power sources by a large number of UHV DC transmissions results in a significant drop in the dynamic reactive power reserve of the system, which seriously reduces the voltage support capability of the receiving end grid. When the DC system is short-circuited by the receiving end AC grid When a fault causes bip...

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): H02J3/00H02J3/24
CPCH02J3/00H02J3/24
Inventor 赵晋泉汤建军胡晓飞汤伟杨铖谢大为
Owner HOHAI UNIV
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