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

A robust state estimation method for power system based on t-distribution

A power system and state estimation technology, which is applied in computing, instrumentation, data processing applications, etc., can solve problems such as influence, assumption errors, abnormal data, etc., and achieve good application prospects, improved accuracy, and high state estimation precision. Effect

Active Publication Date: 2019-01-04
XIAMEN UNIV
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Affected by communication failures, noise, and ambient temperature changes, abnormal values ​​and bad data will appear in PMU measurement values
Assuming that the measurement noise model is assumed wrong at the beginning, it has a very large impact on the accuracy of state estimation

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
  • A robust state estimation method for power system based on t-distribution
  • A robust state estimation method for power system based on t-distribution
  • A robust state estimation method for power system based on t-distribution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] The following examples will further illustrate the present invention in conjunction with the figures.

[0031] The robust state estimation method of the power system based on the t distribution proposed by the present invention, the process is as follows figure 1 shown, including the following steps:

[0032] (1) Power system parameter reading

[0033] The parameter reading includes network parameters such as the topological structure of the power system, the switch state, and the line impedance. According to these data parameters, a node admittance matrix and a node-branch model (such as figure 2 shown).

[0034] (2) Establish an equivalent calculation circuit according to the topology of the power system. According to the considerable preconditions of the system, PMUs are equipped at the corresponding nodes. The measured values ​​include node voltage phasors (real and imaginary parts) and branch current phasors ( real and imaginary parts). The specific PMU config...

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 power system robust state estimation method based on t-distribution, which relates to the technical field of power system analysis. The method comprises steps: reading the specific parameters of the power system to form a node admittance matrix and a node-branch model; according to the topological structure of power system, the equivalent calculation circuit being established, and the synchronous phasor measurement device being installed at the corresponding node according to the observable prerequisite of the system; based on t-distribution and Gaussian distribution, the historical data being fitted with t-distribution and Gaussian distribution; reading a new measurement value expressed by a vector z (k); based on the basic theory of maximum likelihood estimation, a robust state estimation algorithm under t-distribution being constructed; the estimation of robust state of power system based on t-distribution being obtained by judging the convergence condition. The method has the advantages of strong anti-jamming ability, good robustness, and high estimation accuracy.

Description

technical field [0001] The invention relates to the technical field of power system analysis, in particular to a method for estimating a robust state of a power system based on t distribution. Background technique [0002] The power grid is an efficient and fast energy transmission channel and an optimized configuration platform, and is a key link in the sustainable development of electric energy. Since 2010, the size of the national power grid has nearly doubled. While the scale of the power grid continues to expand, the grid-connected capacity of new energy sources such as wind power and solar power continues to increase, which greatly increases the complexity of the power grid. In order to realize the safe, reliable, economical and efficient operation of the power grid, the state estimation of the power system is an indispensable and important part. [0003] Due to the influence of sensor errors and interference, random errors and bad data inevitably exist in the measur...

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): G06Q10/06G06Q50/06
CPCG06Q10/0639G06Q50/06
Inventor 陈腾鹏卿新林曹宇豪
Owner XIAMEN UNIV
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