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Safety and stability control device reliability analysis method in consideration of multistate operation

A safety and stability control and reliability technology, applied in general control systems, control/regulation systems, testing/monitoring control systems, etc., can solve problems such as weakening the reliability of safety and stability control devices, national economic losses, and inability to achieve functions

Inactive Publication Date: 2015-09-09
STATE GRID CORP OF CHINA +3
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  • Abstract
  • Description
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Problems solved by technology

Hidden faults weaken the reliability of the safety and stability control device. Once triggered, the device will fail and cannot realize its proper functions, causing a large amount of load, power loss, and even large-scale power outages, which will bring huge losses to the national economy.

Method used

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  • Safety and stability control device reliability analysis method in consideration of multistate operation
  • Safety and stability control device reliability analysis method in consideration of multistate operation
  • Safety and stability control device reliability analysis method in consideration of multistate operation

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Embodiment Construction

[0044] The present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0045] Such as figure 1 As shown, the safety and stability control device reliability analysis method of the present invention includes the following steps.

[0046] figure 1 In step 1, analyze the hardware system structure of the safety and stability control device. For standardized production, a safety and stability control device is composed of a series of standard stability control modules (Stability Control Model, SCM), which are divided into main control unit, I / O unit and communication unit according to different functions.

[0047] The main control unit is the hub unit of the system, which is responsible for analysis, decision-making and output control, while providing the system's man-machine interface and communication management. The I / O unit is the direct interface between the device and the outside, responsible for sampling analysis...

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Abstract

The invention discloses a safety and stability control device reliability analysis method in consideration of multistate operation, which belongs to the technical field of power system control. A hardware system structure of the safety and stability control device is firstly analyzed; a fault tree model for the safety and stability control device is then built based on a fault tree method, and the failure rate of the safety and stability control device is acquired; and finally, on the basis of Markov state space, a reliability evaluation model for the safety and stability control device is built, and the probability values of the safety and stability control device in four different operation states are calculated. The hardware system structure of the safety and stability control device and the importance degree of each stable control module for composing the device in the device are considered, the fault tree method and the Markov state space method are combined to carry out reliability evaluation on the safety and stability control device, the reliability degree of the device is thus judged, influences on reliability of the device by external faults are considered during the evaluation process, and the evaluation result is more objective and more accurate.

Description

technical field [0001] The invention belongs to the technical field of power system control, and in particular relates to a reliability analysis method of a safety and stability control device in power system safety and stability control. Background technique [0002] China is vigorously building UHV backbone grids and direct current transmission projects that connect large energy bases with major load centers, forming a power grid pattern of "three verticals, three horizontals and one ring network". The safety and stability control device is located in the second line of defense of China's power stability control and will be required to have a high degree of reliability. The traditional reliability assessment is mostly based on the "two-state assumption", and the system is considered to be in a completely normal working state or a completely failed state. In actual engineering, the system is composed of components with multiple states, and it is impossible to directly trans...

Claims

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Application Information

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IPC IPC(8): G05B23/02
CPCG05B23/0218
Inventor 赵丽莉倪明李雪明杨志新余文杰童和钦李悦岑李惠军严佳梅
Owner STATE GRID CORP OF CHINA
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