Check patentability & draft patents in minutes with Patsnap Eureka AI!

Solving method for N-1 security domain of flexible DC power distribution network

A flexible DC and distribution network technology, which is applied in the direction of AC network circuits, power transmission AC networks, and AC networks with the same frequency from different sources, can solve problems such as inapplicability of flexible DC distribution networks, and improve safety margins. degree of effect

Pending Publication Date: 2021-06-25
TIANJIN UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some scholars have established a security domain model for the ship's DC regional power distribution system [4] , its model is only for the specific structure and open-loop operation mode of the ship system, and it is not suitable for ordinary flexible DC distribution network

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
  • Solving method for N-1 security domain of flexible DC power distribution network
  • Solving method for N-1 security domain of flexible DC power distribution network
  • Solving method for N-1 security domain of flexible DC power distribution network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the following embodiments in no way limit the present invention.

[0031] Such as figure 1 As shown, a method for solving the N-1 security domain of a flexible DC distribution network proposed by the present invention, the specific process is as follows:

[0032] Firstly, a mathematical model of the N-1 safe domain of the flexible DC distribution network is established, which includes three inequality constraints of feeder section capacity constraints, converter station capacity constraints, and node voltage constraints. The specific content is as follows:

[0033] The mathematical model of the N-1 security domain of the flexible DC distribution network is as follows:

[0034] Ω DSSR ={W=[P 1 ,P 2 …P k …P n ] T ∈Θ}

[0035] s.t.

[0036]

[0037] In formula (1): ΩDSSR is the security domain, W is the net outflow power of the nod...

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 solving method for an N-1 security domain of a flexible DC power distribution network. The method comprises the following steps: supposing that each feeder line segment and each converter station of the flexible DC power distribution network quit from operation one by one; and conducting the following operations on the flexible DC power distribution network after each feeder line section and each converter station quit from operation: acquiring a linear expression of feeder line section power about node net outflow power and a linear expression of load node voltage about the node net outflow power according to a DistFlow branch power flow linearization method of the flexible DC power distribution network, linearly expressing droop node power and droop node voltage in the two expressions by load power if a droop node is included, and acquiring an intersection of the safety constraints of each feeder line section and each converter station quitting operation, and simplifying the intersection to obtain an analytical expression of the N-1 safety domain. According to the method, the analytical expression of the N-1 safety domain of the flexible DC power distribution network under master-slave control, voltage margin control and droop control can be solved, and the maximum allowable operation range of the flexible DC power distribution network on the premise that the N-1 safety criterion is met is described.

Description

technical field [0001] The invention belongs to the technical field of dispatching and operation of a flexible direct current distribution network, and in particular relates to a method for solving the N-1 security domain of a flexible direct current distribution network. Background technique [0002] In recent years, the proportion of DC loads and DC power sources in the distribution network has been increasing. Compared with the AC distribution network, the DC distribution network is more convenient for DC loads such as electric vehicles and DC power sources such as photovoltaics to be connected. On the other hand, the AC distribution network is facing the problems of shortage of line corridors and limited expansion of power supply capacity, while the DC distribution network can effectively increase the power supply capacity and increase the power supply radius. In this context, the flexible DC distribution network based on Voltage Source Converter (Voltage Source Converte...

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): H02J3/36H02J3/06
CPCH02J3/36H02J3/06H02J2203/20Y02E60/60
Inventor 肖峻莫少雄
Owner TIANJIN UNIV
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