Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Optimal identification method of node equivalent transmission parameters based on single PMU measurement section

A node voltage and node technology, applied in prediction, data processing applications, instruments, etc., can solve problems such as unreasonable results, unreal application, and no consideration of physical constraints of identification parameters

Active Publication Date: 2014-02-12
CHINA ELECTRIC POWER RES INST +1
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because some identification methods do not consider the reasonable physical constraints of the identification parameters themselves, due to measurement data noise, parameter equations and numerical solutions, etc., in some cases, unreasonable results will be identified and cannot be truly applied in the actual engineering environment.

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
  • Optimal identification method of node equivalent transmission parameters based on single PMU measurement section
  • Optimal identification method of node equivalent transmission parameters based on single PMU measurement section
  • Optimal identification method of node equivalent transmission parameters based on single PMU measurement section

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] Attached below figure 1 , attached figure 2 The technical scheme of the present invention is described in further detail:

[0035] figure 1 Middle module 1 realizes periodic calculation of node equivalent short-circuit resistance and reactance, the main steps are as follows:

[0036] (1) In order to ensure the authenticity and effectiveness of the optimal identification method of node equivalent transmission parameters based on the single PMU measurement section, the power grid operation data, including power grid topology, is obtained from the on-site SCADA / EMS system every 5 minutes or 15 minutes structure, parameters, and state estimation data;

[0037] (2) Use the short-circuit current calculation software to calculate the three-phase short-circuit current of all nodes in the power grid, and obtain the short-circuit equivalent resistance Rc and reactance Xc of each node, and use this as the power grid node based on the single PMU measurement section of module 2,...

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 an optimal identification method of node equivalent transmission parameters based on single PMU (Power Management Unit) measurement section, belonging to the technical field of power grid stability monitoring and early warning based on a WAMS (Wide Area Measurement System). The method combines the existing SCDA(Supervisory Control And Data Acquisition) / EMS(Energy Management System) power grid actual topological structure and the state estimation data, obtains equivalent resistance and equivalent reactance of each node of the power grid through a short circuit calculation program, and takes the equivalent resistance and the equivalent reactance as the initial value of an optimal identification algorithm. The PMU measurement data is filtered, and based on a trace sensitivity technology, node equivalent model parameters are identified quickly and effectively. The optimal identification method of node equivalent transmission parameters based on single PMU measurement section effectively avoids influence of PMU actual measurement data noise on the identification result, and provides reliable data basis for realizing online estimation and preventive control on steady state of a large power grid, thereby improving the intelligent real-time monitoring level of the large power grid.

Description

technical field [0001] The invention belongs to the field of power system wide-area measurement and grid stability real-time monitoring, and in particular relates to a node equivalent transmission parameter optimization identification method based on a single PMU measurement section. Background technique [0002] The safe and reliable operation of the power grid is of great significance to social and economic development. With the continuous expansion of the scale of the power grid, the continuous deepening of the reform of the power industry system, and the continuous access of UHV power transmission and renewable resource power, the operating environment of the power grid has become increasingly complex, making the stability analysis and control of the power grid, especially in the real-time environment of the power grid. Stable performance and rapid assessment of trends are challenging. The Wide Area Measurement System (WAMS) based on synchrophasor measurement technology...

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 Patents(China)
IPC IPC(8): G06Q10/04G06Q50/06
Inventor 刘道伟张隽董毅峰许晓菲王虹富高洵王毅李铁群张勇冯静
Owner CHINA ELECTRIC POWER RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com