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Method for judging coordinated control quality of coal-fired power plant

A technology of coordinated control and quality judgment, applied in the direction of electrical program control, program control, comprehensive factory control, etc., can solve problems such as high requirements for engineering practice personnel, lack of quantitative evaluation results, and inapplicability of some systems, and achieve data acquisition means Simple, scalable, and easy-to-understand effects

Pending Publication Date: 2021-12-31
DATANG DONGBEI ELECTRIC POWER TESTING & RES INST
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  • Claims
  • Application Information

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Problems solved by technology

[0011] The purpose of the present invention is to provide a method for judging the quality of coordinated control of coal-fired power plants, which solves the problem that the existing coordinated control system is not applicable to some systems when it is evaluated by academic means, and the requirements for engineering practice personnel are too high. The lack of quantitative evaluation results leads to the problem of unobjective evaluation

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  • Method for judging coordinated control quality of coal-fired power plant
  • Method for judging coordinated control quality of coal-fired power plant
  • Method for judging coordinated control quality of coal-fired power plant

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Experimental program
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specific Embodiment approach 1

[0036]A coal-fired power station coordinated control quality judgment method, the specific steps are as follows:

[0037] Step S1: Establish OPC communication with the distributed control system of the power plant in order to extract data.

[0038] Step S2: When the rate of change of the load command exceeds the first threshold S within a certain period of time 1 When , start to extract the data used to characterize the coordinated control index; the extracted data includes the set value data U i and the feedback value data U Si , 1≤i≤N, N is the number of data types extracted; where, when i=1, U 1 is the actual load value, U S1 is the load command value.

[0039] Here U i and U Si It is a physical quantity with a specific physical meaning, and its characteristic is that it can represent the coordination control index. According to the DL / T657-2015 standard, the physical quantity that can represent the coordination control index has a defined meaning, such as the indicat...

specific Embodiment approach 2

[0052] Specific embodiment two: the difference between this embodiment and specific embodiment one is:

[0053] N=9

[0054] u 2 Main steam pressure feedback value, U S2 Main steam pressure setting value;

[0055] u 3 Main steam temperature feedback value, U S3 Main steam temperature set point;

[0056] u 4 is the reheat steam temperature feedback value, U S4 Set value for reheat steam temperature;

[0057] u 5 is the middle point temperature feedback value, U S5 Set value for the middle point temperature;

[0058] u 6 is the bed temperature feedback value, U S6 Set value for bed temperature;

[0059] u 7 is the drum water level feedback value, U S7 Set value for drum water level;

[0060] u 8 is the furnace pressure feedback value, U S8 Set value for furnace pressure;

[0061] u 9 is the feedback value of smoke content, U S9 Set value for smoke content.

[0062] This embodiment provides the data types that need to be obtained. These data types are highl...

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Abstract

The invention relates to a method for judging the coordinated control quality of a coal-fired power plant. The method comprises the following steps: establishing OPC communication with a decentralized control system of the power plant; monitoring data in a period from the beginning of the load instruction to the stable load in real time; calculating a deviation between a set value and an actual value in each item of data as a single index, and extracting a maximum deviation value, an adjustment time value and an oscillation number value from each single index; distributing a first-level weight coefficient for each single index; distributing a second-level weight coefficient according to the first-level weight coefficient; and finally calculating an evaluation score according to a formula. The method is suitable for formulating the unit plant control level evaluation standard. The method solves the problem that the existing coordination control quality evaluation mode is not suitable for part of systems, has too high requirements on engineering practicers, and lacks quantitative evaluation results, so that the evaluation is not objective.

Description

technical field [0001] The invention relates to the field of variable load coordinated control quality assessment, in particular to a method for judging the quality of coordinated control of coal-fired power stations. Background technique [0002] As the basic unit of the power grid, the unit unit is of great significance to the economic operation, safety and stability of the power grid. With the continuous improvement of the automation level of power grid operation, the requirements for the control level of the unit unit are getting higher and higher: the unit must not only carry the base load, but also participate in the peak regulation and frequency regulation of the entire power grid, and even in some main parts of the unit. In the event of auxiliary equipment and partial failures, it must still be able to maintain operation. At present, the coordinated control and optimization management system of the entire grid level based on the coordinated control system of unit un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/418
CPCG05B19/41875G05B2219/32368
Inventor 高庆辉李宣谕索东楠张召鹏
Owner DATANG DONGBEI ELECTRIC POWER TESTING & RES INST
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