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Method and system for assessing power grid panel point reliability

A reliable and node-based technology, applied in the field of electric power, can solve problems such as long calculation time and complexity

Active Publication Date: 2013-05-08
POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] One way of the existing power grid reliability assessment is through power flow calculation and stability calculation, and the other way is to use the model algorithm of reliability assessment, but the existing two methods are relatively complicated and the calculation time is relatively long

Method used

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  • Method and system for assessing power grid panel point reliability
  • Method and system for assessing power grid panel point reliability
  • Method and system for assessing power grid panel point reliability

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Such as figure 2 As shown, the system to be evaluated has two voltage levels. Define the reliability coefficient of the line as follows: the reliability coefficient of the 220KV single-circuit line is 0.95, the reliability coefficient of the 220KV double-circuit line on different towers is 0.99, the reliability coefficient of the 110KV single-circuit line is 0.95, and the reliability coefficient of the 110KV double-circuit line on the same tower The reliability coefficient is 0.985; the node reliability coefficient is defined as: the reliability coefficient of the 220KV substation is 0.99, and the reliability coefficient of the 110KV substation is 0.99. What needs to be added is that the definition of the correlation coefficient in the embodiment is only an example to illustrate the present invention, and different definitions can be made according to the actual situation in actual operation, but all are within the protection scope of this patent.

[0042] The above d...

Embodiment 2

[0061] Such as image 3 As shown, the system to be evaluated has 3 voltage levels. Define the reliability coefficient of the line as follows: the reliability coefficient of the 220KV single-circuit line is 0.95, the reliability coefficient of the 220KV double-circuit line on different towers is 0.99, the reliability coefficient of the 110KV single-circuit line is 0.95, and the reliability coefficient of the 110KV double-circuit line on the same tower The reliability coefficient is 0.985, and the reliability coefficient of 35KV single-circuit line is 0.95; the reliability coefficient of defined nodes is: the reliability coefficient of 220KV substation is 0.99, the reliability coefficient of 110KV substation is 0.99, and the reliability coefficient of 35KV substation is 0.98.

[0062] The above definitions are included in the obtained component information. According to the above definitions, there are:

[0063] First, determine the reliability parameters of 220KV substations 1...

Embodiment 3

[0072] This embodiment still uses image 3 The system and the definition of the reliability coefficient are the same as those in Embodiment 2, but the difference is that this embodiment simulates the disconnection of the line between substation 2 and substation 3 for maintenance. at this time:

[0073] Reliability parameters of 220KV substations 1 and 2:

[0074] R 1 = [0.9703, 0.9703];

[0075] Reliability parameters of 110KV substation:

[0076] R23=[1-(1-R 1 *C 213 )]*B 3 =0.9126;

[0077] Then calculate the reliability parameters of the 35KV substation:

[0078] R 34 =[1-(1-R 23 *C 334 )]*B 4 =0.8496;

[0079] It can be seen that the reliability of the 110KV substation and the 35KV substation has dropped significantly due to the maintenance of the line. At this time, judge the reliability index of the nodes. For example, the 110KV substation needs to reach a reliability of 0.97, and the 35KV substation needs to reach a reliability of 0.90. Then, substations 3...

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Abstract

The invention provides a method and a system for assessing power grid panel point reliability. The method comprises the steps that a reliability assessment order is received, power grid structural information and related element information are acquired according to the reliability assessment order; the reliability coefficient of each connecting line is generated according to the power grid structural information, the reliability coefficient of each node is generated according to the element information; the reliability parameter of each node is determined according to the reliability of each connecting line and the reliability of each node. According to the method and the system, the reliability of a power grid can be assessed easily, quickly and efficiently.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a method and system for evaluating the reliability of grid nodes. Background technique [0002] With the increasing scale and complexity of the power system, in order to ensure the safe and stable operation of the power system and the high-quality and reliable power supply, reliability assessment is required in all stages of the planning, design and operation of the power system to ensure the reliability of the power system. Sufficiency and security. In the planning and design phase, reliability assessment mainly involves forecasting power demand, identifying system weak links, optimizing schemes, reducing the impact of large disturbances, ensuring sufficient reserve capacity, etc.; while in the operation phase, the main purpose of reliability assessment is to ensure that all The reliability of this operation mode ensures that the system can operate normally and stably w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q50/06
Inventor 林少华刘嘉宁占才亮鲁跃峰李普明孟子杰李博唐雨晨梁亮宋宇骞
Owner POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD
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