Real-time risk assessment method facing power grid dispatching operation

A technology for risk assessment and power grid dispatching, applied to instruments, data processing applications, information technology support systems, etc., can solve problems such as misoperation, frequent dispatching operations, and suboptimal operations

Active Publication Date: 2015-11-18
TIANJIN UNIV
View PDF3 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Scheduling operations are more frequent, and accidents caused by misoperations are more serious than before
However, due to the lack of powerful scientific tools, current dispatchers can only rely on experience to make dispatching decisions. In this case, the decisions made are often not optimal operations, and may even cause misoperations.

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
  • Real-time risk assessment method facing power grid dispatching operation
  • Real-time risk assessment method facing power grid dispatching operation
  • Real-time risk assessment method facing power grid dispatching operation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0125] In Example 1, in order to facilitate the description of the accident set generation method, let δ S = 0.2; δ V =2×10 -2 p.u. Calculate the power flow before and after operation for each line, and |ΔS / S of the line N | and the ΔV(p.u.) of the nodes are sorted, and the results are shown in Table 1.

[0126] Table 1

[0127] line

|ΔS / S N |

node

ΔV(p.u.)(×10 -2 )

8-30

1.1338

16

2.2786

16-17

0.4744

30

1.7429

12-16

0.4500

13

1.3620

14-15

0.3770

14

1.0933

15-17

0.3651

5

1.0524

30-17

0.3443

38

0.9214

13-15

0.3305

22

0.5976

12-14

0.2957

17

0.5630

5-6

0.2878

21

0.5618

7-12

0.1855

20

0.3832

[0128] It can be seen from Table 1 that lines 8-30, 16-17, 12-16, 14-15, 15-17, 30-17, 13-15, 12-14 and 5-6 are key lines, and node 16 is a key node .

[0129] Further...

Embodiment 2

[0132] In embodiment 2, in order to illustrate the efficient accuracy of the inventive method better, suppose δ S = 0.3; δ V =2×10 -2 p.u. Figure 4 shows the number of accidents, calculation time at different search depths, Figure 5 The corresponding risk index error is shown, and the calculation error is based on the calculation result of the "N-1" scanning method. It can be seen that when N increases, n c As it increases, the calculation error decreases. The smaller calculation error reveals that the method of the present invention can find out the components that are more sensitive to the scheduling operation, so the selected accident set C 0 It can meet the accuracy and efficiency requirements of dispatching operation risk assessment.

[0133] The risk at N=1 is analyzed.

[0134] Table 2 shows the ranking of the voltage limit indicators of each accident node:

[0135] Table 2

[0136] accident line

ΔR V (×10 -2 )

accident line

ΔR V (×...

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 real-time risk assessment method facing power grid dispatching operation. The method mainly comprises a step I, reading system real-time running data and a dispatching operation instruction; a step II, searching key equipment according to a system trend change before and after operation, and generating an accident set needed by risk assessment; and a step III, calculating a dispatching operation risk index, i.e., a change value of a system risk index before and after dispatching operation. Generation of the accident set comprises calculating a trend before the operation and the trend after the operation, searching a key line and a key node according to the trend change before and after the operation, performing breadth-first search taking a to-be-operated line and the key equipment as centers and taking N as the search depth, and then the accident set is generated. Furthermore, especially aiming at a line trend overload index and a node voltage out-of-limit index, a specific algorithm is provided. The assessment method can provide an auxiliary decision basis for dispatching personnel to reduce a risk which may be brought by the dispatching operation on a system.

Description

technical field [0001] The invention belongs to the field of power grid dispatching and power grid operation, and in particular relates to a real-time risk assessment method oriented to power grid dispatching operation. Background technique [0002] With the reform of the electricity market and the expansion of the scale of the power system, the power grid is operating more and more close to the safety limit. Scheduling operations are more frequent, and accidents caused by misoperations are more serious than before. However, due to the lack of powerful scientific tools, current dispatchers can only rely on experience to make dispatching decisions. In this case, the decisions made are often not optimal operations, and may even cause misoperations. Therefore, it is necessary to propose a quantitative scheduling operation risk to provide decision-making reference for dispatchers. Contents of the invention [0003] The technical problem to be solved by the present invention ...

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
CPCY04S10/50
Inventor 曾沅卢东旭侯恺
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