Power system steady-state power flow risk identification and prevention method, storage medium and equipment

A power system stability and risk technology, applied in the direction of electrical components, circuit devices, AC network circuits, etc., can solve problems such as branch power flow out of bounds, power system power flow uncertainty, voltage fluctuation, etc., to ensure safe and stable operation, Effect of improving safe and stable operation capability

Active Publication Date: 2020-10-02
XI AN JIAOTONG UNIV +1
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the uncertainty of wind power and photovoltaics leads to the uncertainty of the power system power flow, which in turn causes problems such as voltage fluctuations and branch power flow out of bounds, which brings huge challenges to power system dispatchers

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 system steady-state power flow risk identification and prevention method, storage medium and equipment
  • Power system steady-state power flow risk identification and prevention method, storage medium and equipment
  • Power system steady-state power flow risk identification and prevention method, storage medium and equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0055] The present invention provides a method for identifying and preventing the steady-state power flow risk of a power system considering the access of a high proportion of new energy sources. The method is based on historical wind speed, light intensity forecast data and actual data sets, and the power characteristic curve of new energy units. Probabilistic modeling of energy unit output forecast errors; according to the current real-time forecast value of new energy unit output, the probability distribution of the corresponding forecast error is obtained, and the semi-invariant method is used for random power flow calculation to obtain the probability distribution of each node voltage and branch power ; Judge whether there is a risk of voltage and power flow crossing the boundary at the prediction time, if there is no risk, proceed to the next time calculation, if there is a risk, adjust the active and reactive power of the generator set nearby, and perform random power flow...

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 discloses a power system steady-state power flow risk identification and prevention method, a storage medium and equipment. The method comprises the steps of carrying out the probabilitymodeling of an output prediction error of a new energy unit based on prediction data and an actual data set of historical wind speed and illumination intensity, and a power characteristic curve of the new energy unit, according to the real-time prediction value of the output of the current new energy unit, obtaining a probability distribution expression of a corresponding prediction error, and performing random power flow calculation by adopting a semi-invariant method to obtain probability distribution of voltage and branch power of each node, and according to a probability distribution setthreshold, judging whether a risk of voltage and power flow boundary crossing exists at the prediction moment, in the case of no risk, carrying out calculation at the next moment, and in the case of arisk, carrying out active and reactive adjustment on the generator set, and carrying out random power flow calculation again until no risk exists. The method can accurately and efficiently identify the area and degree of the steady-state power flow risk of the power system, provide risk prevention measures, and improve the safe and stable operation capability of the power system.

Description

Technical field [0001] The invention belongs to the technical field of power system risk assessment, and specifically relates to a method, storage medium and equipment for the identification and prevention of steady-state power flow risk of a power system considering the access of a high proportion of new energy sources. Background technique [0002] Because wind power and photovoltaic power generation are clean and environmentally friendly, my country's wind power and photovoltaic power generation will usher in a large-scale construction peak. However, the uncertainty of wind power and photovoltaics leads to uncertainties in the power system flow, which in turn causes problems such as voltage fluctuations and cross-border flow of branch circuits, which poses huge challenges to power system dispatchers. [0003] On the afternoon of August 9, 2019, a large-scale blackout occurred in the UK. The sudden drop in the output of the wind turbines in the Horn offshore wind farm was one of ...

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 Applications(China)
IPC IPC(8): H02J3/00H02J3/06
CPCH02J3/00H02J3/06H02J2300/28H02J2300/22H02J2203/10H02J2203/20Y02A30/00
Inventor 别朝红林超凡李更丰黄格超孙思源刘菲陈晨吴子豪王辰曦唐露甜
Owner XI AN JIAOTONG UNIV
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