Power distribution network line protection constant value checking algorithm

A line protection and distribution network technology, applied in emergency protection circuit devices, electrical components, parameter calibration/setting, etc. Value check calculation and other issues

Active Publication Date: 2018-06-01
广东电网有限责任公司惠州供电局
View PDF4 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A calculation method and system for online checking of relay protection fixed value (CN201610965216) proposes a fast checking algorithm based on the parallel principle, but it is mainly used in ultra-high ...

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
  • Power distribution network line protection constant value checking algorithm
  • Power distribution network line protection constant value checking algorithm
  • Power distribution network line protection constant value checking algorithm

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] refer to figure 1 — image 3 , the present invention provides a distribution network line protection fixed value check algorithm, including the following

[0076] step;

[0077] S1; the user sets the node and the corresponding parameters for the new energy access to the distribution network, including lines, transformers, unit types and unit parameters;

[0078] S2; According to the characteristics of "ring network structure, open-loop operation" of the distribution network, search the topology structure of the line where the new energy access point is located in the current mode until the end of the line and the power node of the line, which is the step-down node connected to the line For the low-voltage bus of the substation, determine the number of protections that need to be checked for fixed value due to the impact of new energy access;

[0079] S3: Manually input or collect the output power of the new energy power supply in the EMS system online, and set it as ...

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 belongs to the technical field of power grid dispatching operation and relay protection, and particularly relates to a power distribution network line protection constant value checkingalgorithm. The power distribution network line protection constant value checking algorithm includes: setting a node of allowing new energy to access a power distribution network and a corresponding parameter; determining the number of protections which are affected by new energy access and need to perform constant value checking according to the features of a looped network structure and open loop operation of the power distribution network; manually inputting or online-acquiring the output power of a new energy power supply in an EMS system, and setting the output power as a short-circuit calculation initial value; encoding a fault calculation result according to the number of the protections to be checked and branches where the protections are located; performing constant value checkingon a phase current protection, a zero sequence current protection, a phase distance protection, and a grounding distance protection, and determining the selectivity and the sensitivity of the constant values; and finally outputting the checking result. The objective of the invention is to achieve protection constant value adaptation checking according to the features of the power distribution network after mass new energy is accessed currently.

Description

technical field [0001] The invention belongs to the technical field of power grid dispatching operation and relay protection, and in particular relates to a fixed value check algorithm for distribution network line protection. Background technique [0002] Relay protection is one of the most important secondary devices in the power system, and its accuracy and reliability are directly related to the safe operation of the power system. In order to ensure the "selectivity, sensitivity, rapidity and reliability" requirements of relay protection, the traditional relay protection is based on the mode of "pre-setting and regular calibration", and a large number of methods are combined and calculated to make the protection fixed. The value can cover various possible operation modes of the power system to ensure that the requirements of quickly isolating faults and retaining normal equipment are met. However, with the rapid development of the power system, especially the large-scal...

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): H02H7/26H02H7/28H02H7/22
CPCH02H3/006H02H7/22H02H7/26H02H7/28
Inventor 王英民邓景松孙迪飞朱凌何奕枫赖育杰周晓明郭琳郑兆典王晓晖孙驰易小翟
Owner 广东电网有限责任公司惠州供电局
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