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Method for performance evaluation and failure diagnosis of coke oven multi-loop control system

A control system and multi-loop technology, applied in comprehensive factory control, electrical program control, electrical test/monitoring, etc., can solve problems such as performance degradation, product output reduction, and operating cost increase

Inactive Publication Date: 2011-11-09
CENT SOUTH UNIV
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Problems solved by technology

Existing combustion control systems for coke oven heating generally perform well in the initial stages of industrial process operation, but without regular maintenance, performance degrades over time
This leads to problems such as reduced product yield and increased operating costs.

Method used

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  • Method for performance evaluation and failure diagnosis of coke oven multi-loop control system
  • Method for performance evaluation and failure diagnosis of coke oven multi-loop control system
  • Method for performance evaluation and failure diagnosis of coke oven multi-loop control system

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Embodiment 1

[0040] For the performance evaluation and fault diagnosis of the multi-loop control system for the heating and combustion process of the coke oven, it is first necessary to establish the indicators needed for the evaluation. These indicators are also the index of the fault source search during the fault diagnosis. Two indicators of capability index.

[0041] 1. In order to reflect the fitting degree between the detected value of the flue temperature and the set value, the improved coefficient of difference is defined as the performance index, and the formula is as follows:

[0042] V = Σ i = 1 N ( Y t - ...

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Abstract

The invention provides a method for the performance evaluation and the failure diagnosis of a coke oven multi-loop control system; the method for the performance evaluation of the coke oven multi-loop control system adopts a fuzzy comprehensive evaluation method to calculate performance level of a coke oven heating combustion control system; the fuzzy comprehensive evaluation method includes two evaluation factors: improved difference coefficient and process capability index; the method for the failure diagnosis comprises the steps: firstly establishing a failure knowledge base based on the improved difference coefficient and the process capability index of multi-loop control, searching for all the possible failure resources according to the optimal matching principal by regarding the improved difference coefficient and the process capability index as index in case that the performance level of the coke oven heating combustion control system is qualified or below, and embodying these failure sources visually in the form of text. The method enhances automation degree of failure elimination, dramatically lowers labor intensity of staff and raises working efficiency.

Description

technical field [0001] The invention relates to a method for performance evaluation and fault diagnosis of a coke oven multi-loop control system. technical background [0002] With the rapid development of the iron and steel industry, the coking industry has also developed rapidly, and the design of the heating and combustion control system for controlling the temperature of the coke oven is becoming more and more perfect. However, due to long-term operation and lack of effective maintenance, the control performance of the coke oven heating and combustion control system continues to decline, thereby reducing the economic benefits of coking enterprises and affecting the quality, output and production cost of coke. [0003] The coke oven is one of the most important industrial furnaces in the coal chemical industry. It is the key production equipment of coke, and also produces a large amount of coke oven gas to provide fuel for other production processes. However, the coke ov...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/418G05B23/02
Inventor 吴敏曹卫华陈鑫雷琪李鹏程安剑奇
Owner CENT SOUTH UNIV
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