Method and system for calculating probabilistic load flow considering unbalanced power distribution

A probabilistic power flow calculation and power technology, which is applied to AC networks with the same frequency from different sources, calculations, and AC network circuits, etc. Reasonable problem, avoid the effect of convolution operation

Pending Publication Date: 2018-04-27
CHINA ELECTRIC POWER RES INST +5
View PDF4 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the traditional semi-invariant method probabilistic power flow calculation, the unbalanced power generated by the rand

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
  • Method and system for calculating probabilistic load flow considering unbalanced power distribution
  • Method and system for calculating probabilistic load flow considering unbalanced power distribution
  • Method and system for calculating probabilistic load flow considering unbalanced power distribution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0145] Refer to attached figure 2 : Flow chart of the main calculation steps and analysis steps of the probabilistic power flow calculation method considering unbalanced power distribution. In the figure, the working functions of each module are as follows:

[0146] Basic data preparation, including grid model, equipment parameters, unit output and its probability distribution description, bus load expectation and its probability distribution description, etc.

[0147] Calculation of Probabilistic Power Flow by Semi-invariant Method

[0148] 1) According to the probability distribution characteristics of the bus load, its origin moment is obtained.

[0149] For a random variable with continuous distribution, if the density function of the random variable X is f(x), then its r-order origin moment α r It can be obtained from formula (1):

[0150]

[0151] For a random variable with a discrete distribution, let the discrete random variable X take the value x i with proba...

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 method and a system for calculating a probabilistic load flow considering unbalanced power distribution. The method comprises the following steps: acquiring basic data; calculating the half invariant of a bus load and the half invariant of new energy unit output according to the acquired basic data; and obtaining the probability distribution of voltage and branch power flow considering injection power fluctuation and unbalanced power distribution according to the half invariant of the bus load and the half invariant of the new energy unit output. Through the technicalscheme provided by the invention, the unreasonable problem that unbalanced power in the probabilistic load flow in a traditional half invariant method is undertaken by balancing bus is solved, and theaccuracy and practicability of the probabilistic load flow in the half invariant method are improved.

Description

technical field [0001] The invention belongs to the technical field of power system automation, and in particular relates to a probabilistic power flow calculation method and system considering unbalanced power distribution. Background technique [0002] The formulation of power generation plan and blackout plan needs to ensure the safe and stable operation of the power grid through future state power flow and safety analysis. At present, the safety check centered on future state trends and safety analysis has been widely used in control centers at all levels in my country, and has achieved good application results. However, the existing technologies are all based on deterministic power flow models. For each analysis section, the power supply, network and load are "expected values" at a certain moment in the future, and fail to consider the changes in power flow distribution caused by various uncertain factors and Grid security risk. [0003] Probabilistic power flow can t...

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): H02J3/06G06Q10/06G06Q50/06
CPCH02J3/06G06Q10/0635G06Q50/06H02J2203/20
Inventor 张传成赵宇民张晓天李智明胡超凡王斌杨军峰罗治强郑晓雨屈可丁张健男戴赛崔晖丁强黄国栋周京阳许丹李晓磊蔡帜胡晨旭周劼英刘力华夏少连熊华强姜曼李旻张宏图潘毅李立新李强陈志程鑫邓勇张加力李培军李伟刚韩彬过夏明孙毅闫翠会李博门德月燕京华孙振刘芳吴锟
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