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

Prevention and control method of cascading failures of coal-fired units

A technology of coal-fired units and cascading faults, which is applied in the direction of emergency treatment of AC circuit layout, AC network circuits, electrical components, etc., can solve problems such as unreasonable generator load sharing, power system collapse, and huge economic losses, so as to avoid burden Effects of excessive load, reduction of economic losses, and improvement of safety performance

Active Publication Date: 2022-06-21
POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If it is not handled properly or in time, it may cause unreasonable load sharing of other generators, and other units may also face the possibility of decommissioning
Once the failure of a certain unit spreads into a cascading failure of the system, the entire power system will face collapse and huge economic losses

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
  • Prevention and control method of cascading failures of coal-fired units
  • Prevention and control method of cascading failures of coal-fired units
  • Prevention and control method of cascading failures of coal-fired units

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.

[0037] For this purpose, see figure 1 , the invention provides a coal-fired unit cascading failure prevention and control method, comprising the following steps:

[0038] Obtain the health degree, failure maintenance cost and failure load transfer cost of each coal-fired unit.

[0039] There is a process for the unit to go from a good state to a fault state, during which the unit operates in a sub-healthy operation mode. Health can be used to evaluate this process. When the health of the unit is 1, the components in the unit are considered to be intact, and the failure rate of the unit at this time is approximately 0. When the health of the unit is 0.65, it is considered that some components in the unit are seriously degraded. At this time, the u...

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 preventing and controlling coal-fired unit chain faults in the field of power grid security dispatching, including obtaining the health degree, failure maintenance cost and fault load transfer cost of each coal-fired unit; calculating the failure rate of the coal-fired unit through the health degree , and combined with the fault maintenance cost to calculate the risk coefficient; establish a multi-objective function with the goal of minimizing the risk coefficient and fault load transfer cost; use the multi-objective particle swarm algorithm Pareto to obtain the health threshold through the multi-objective function; when the health degree is greater than the health degree When the threshold is reached, the coal-fired unit is kept running, otherwise, the load is shifted. The present invention analyzes the health threshold value according to the operation state of the coal-fired unit, compares the health degree of the unit with the health threshold value, detects abnormal operation status of the unit or abnormal equipment in time, and guides the power grid in real time to make scheduling adjustments. When a faulty unit occurs, the The invention provides a load shedding and load transfer scheme to block the spread of faults, thereby improving the overall safety performance of the large power grid.

Description

technical field [0001] The invention relates to the field of power grid safety dispatching, in particular to a coal-fired unit chain failure prevention and control method Background technique [0002] The causes of cascading faults in the power grid are more complicated. Simply put, each component of the power grid has a certain initial load during normal operation. When one or several components fail due to overload, it will change the balance of the power flow and cause the load to be redistributed on other nodes, and the excess load will be transferred to other components. If these originally working components cannot handle the excess load, it will cause a new load redistribution, which will cause chain overload failures, and eventually lead to large-scale paralysis of the network and large-scale power outages. [0003] At present, there have been many achievements in the research on the cascading fault propagation mechanism, which can be divided into three categories f...

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): H02J3/00H02J3/46
CPCH02J3/46H02J3/0073H02J3/001
Inventor 林玥廷卢建刚郭文鑫王彬林英明刘文哲邹光球王银河张成煜李号彩谢小鹏丁伟龙建平吴名新张家美汤俊
Owner POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD
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