Method for evaluating power system static risk based on hybrid power flow

A power system and risk assessment technology, applied in the field of power grid planning and power system risk assessment, which can solve problems such as non-convergence of power flow

Active Publication Date: 2014-08-13
TIANJIN UNIV +1
View PDF5 Cites 33 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the deficiencies of the traditional power grid planning evaluation method, the present invention provides a static risk evaluation method of the power system based on mixed power flow, which comprehensively evaluates the safety level of the power system by using the risk evaluation technology and combining the probability of

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 for evaluating power system static risk based on hybrid power flow
  • Method for evaluating power system static risk based on hybrid power flow
  • Method for evaluating power system static risk based on hybrid power flow

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0076] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0077] The present invention proposes a static risk assessment technology of power system based on mixed power flow, and its implementation flow chart is as follows figure 1 and figure 2 As shown, now with image 3 The example network shown is taken as an example, and the details are as follows:

[0078] Step 1. Formulate a planning scheme according to the current power system structure and future demand in the planning area, and establish a corresponding planning scheme model; the estimated future electricity demand and installed capacity of the power grid in the implementation example are shown in Table 1, and the planning scheme is formulated according to the forecast results. image 3 shown.

[0079] Table 1 Grid electricity demand and installed capacity prediction results table

[0080]

[0081]...

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 method for evaluating the power system static risk based on hybrid power flow. The method comprises the steps that (1) according to the current structure of a power system and a planning scheme, a corresponding planning scheme model is established; (2) according to equipment data and the structure of a power grid, predicated faults of the power grid and the possibility of the predicated faults are analyzed, and then a predicated fault set is established; (3) the power flow corresponding to all the faults in the predicated fault set is worked out through the risk state based on the hybrid power flow, and for the fault with power flow out of range, load loss is used as a fault consequence; (4) according to the load loss of the fault states and the possibility of the fault, the system risk indicator is worked out; (5) according to the system risk indicator, the weak link of the system is found. According to the method for evaluating the power system static risk based on the hybrid power flow, the problem that when high-order fault occurs in a large complicated power grid, misconvergence of power flow is caused due to the fact that only alternating-current power flow is applied during risk evaluation is solved through the hybrid power flow.

Description

technical field [0001] The invention belongs to the field of grid planning and relates to the field of power system risk assessment Background technique [0002] Most of the traditional power grid planning and design studies focus on the problem of determining the number and location of the transmission lines to be built to minimize the total investment cost on the basis of meeting the future load demand. Among them, when comparing planning schemes and checking safety and stability, deterministic methods are generally used to evaluate the reliability of planning schemes. A deterministic approach is to study the reliability level of the grid in the event of expected failures. The most commonly used deterministic method is the system N-1 or N-K method, that is, when any one or K components (such as generators, lines, transformers, etc.) fail to stop running, calculate the power flow and node voltage of the line in the system, and verify Whether it is overloaded or the voltag...

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): G06Q50/06
Inventor 曾沅秦超朱文峰周保荣金小明
Owner TIANJIN 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

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