Layered access direct current commutation failure prevention and control setting method and device

A commutation failure and layered access technology, which is applied in circuit devices, AC network circuits, power transmission AC networks, etc., can solve the problem of few researches on the method for determining the control parameters for commutation failure prevention and control of DC layered access, etc. Achieve the effect of optimization of commutation failure prevention control parameters, fast speed and simple means

Active Publication Date: 2019-02-12
CHINA ELECTRIC POWER RES INST +2
View PDF1 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] Although there are various types of conventional DC commutation failure prevention and control analysis, there ar

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
  • Layered access direct current commutation failure prevention and control setting method and device
  • Layered access direct current commutation failure prevention and control setting method and device
  • Layered access direct current commutation failure prevention and control setting method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0079] The present invention will be described in further detail below in conjunction with the accompanying drawings. In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0080] This embodiment provides a setting method for prevention and control of commutation failure in hierarchical access DC, and proposes an improvement for the prevention and control of commutation failure on the inverter side in e...

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 layered access direct current commutation failure prevention and control setting method and device. The method comprises the following steps: constructing an electromechanicaland electromagnetic hybrid simulation example, the example comprising acquired electromechanical side data of layered access of ultrahigh voltage direct current and a built electromagnetic side modelof the layered access of the ultrahigh voltage direct current; setting a fault, and finding out a fault form that causes a commutation failure of a converter valve on a non-faulty layer; analyzing factors affecting a turn-off angle in a commutation failure prevention and control logic, and selecting parameters suitable for the commutation failure prevention and control of a layered access system;and forming a commutation failure prevention and control strategy according to the parameters for the commutation failure prevention and control. The layered access direct current commutation failureprevention and control setting method provided by the invention adopts an electromechanical-electromagnetic hybrid simulation measure, and a direct current system is built on the electromagnetic side, so that a detailed structure of layered direct current is considered, and the defect that a traditional electromechanical model simulation method cannot accurately simulate a commutation failure process is overcome.

Description

technical field [0001] The invention relates to a method in the field of simulation and calculation of an electric power system, in particular to a method and device for preventing and controlling the commutation failure of layered access DC. Background technique [0002] UHV layered access (1000kV and 500kV AC power grid) has obvious advantages in improving the voltage support capability of the receiving end system and guiding the reasonable distribution of power flow. At present, the commutation failure prevention and control strategy of the UHVDC transmission system has played a good role in preventing the commutation failure from happening again on the inverter side during the voltage recovery process after the fault. However, when a fault on a single level of the DC receiving end causes a small drop in the AC voltage on the other level, the current commutation failure prevention and control strategy often cannot prevent the other level from commutation failure, and even...

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): H02J3/36
CPCH02J3/36H02J2203/20Y02E60/60
Inventor 王艺璇张鑫陈绪江孙丽香穆清史东宇李四勤李旭涛李宏强摆存曦张迪张星徐得超王峰刘敏张艳彭红英王祥旭郑伟杰徐树文徐翌征程昱王跃牛琳琳乔小敏
Owner CHINA ELECTRIC POWER RES INST
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