A quality evaluation method for variable load coordination control in thermal power plants

A technology of coordinated control and quality evaluation, applied in the direction of electrical program control, comprehensive factory control, etc., can solve the problems of high requirements for engineering practitioners, lack of quantitative evaluation results, and difficulty in obtaining parameters, so as to achieve simple data acquisition means, Good expandability and comprehensive effect evaluation

Active Publication Date: 2019-09-06
柳行
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0011] The purpose of the present invention is to solve the problem that the existing coordinated control system is not applicable to some systems when it is evaluated by academic methods, and the requirements for engineering practitioners are too high, and when it is evaluated by engineering practice, it lacks quantitative evaluation results, resulting in unobjective evaluation. Shortcomings, as well as the difficulty of obtaining parameters, a method for evaluating the quality of thermal power plant variable load coordination control is proposed

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  • A quality evaluation method for variable load coordination control in thermal power plants
  • A quality evaluation method for variable load coordination control in thermal power plants
  • A quality evaluation method for variable load coordination control in thermal power plants

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specific Embodiment approach 1

[0043] Specific implementation mode one: the thermal power plant load variable coordination control quality evaluation method of this embodiment is characterized in that it includes:

[0044] Step S1: Establish OPC communication with the distributed control system of the power plant in order to extract data.

[0045] 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 feedback value data U i and the setpoint data Us i , 2≤i≤N, N is the number of extracted data types; among them, U 1 is the actual load value, Us 1 is the load command value.

[0046] Here U i and Us i 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 / T 657-2015 standard, the physical quantity that can represent the coor...

specific Embodiment approach 2

[0059] Specific implementation mode two: the difference between this implementation mode and specific implementation mode one is:

[0060] N=9;

[0061] u 2 Main steam pressure feedback value, Us 2 Main steam pressure setting value;

[0062] u 3 Main steam temperature feedback value, Us 3 Main steam temperature set point;

[0063] u 4 is the feedback value of reheat steam temperature, Us 4 Set value for reheat steam temperature;

[0064] u 5 is the midpoint temperature feedback value, Us 5 Set value for the middle point temperature;

[0065] u 6 is the bed temperature feedback value, Us 6 Set value for bed temperature;

[0066] u 7 is the drum water level feedback value, Us 7 Set value for drum water level;

[0067] u 8 is the furnace pressure feedback value, Us 8 Set value for furnace pressure;

[0068] u 9 is the feedback value of smoke content, Us 9 Set value for smoke content.

[0069] This embodiment provides the data types that need to be obtained. ...

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Abstract

The invention relates to a method for evaluating the heat-engine plant varying load coordinated control quality and belongs to the technical field of varying load coordinated control quality evaluation. In order to solve the problems that the existing coordinated control system evaluation method is not applicable to some systems, requirements for the engineering practice personnel are too demanding and the quantitative evaluation result is lacking, which leads to the evaluation is not objective, a method for evaluating the heat-engine plant varying load coordinated control quality is proposed. The method comprises steps of establishing OPC communication with a decentralized control system of the power plant; detecting data of a load instruction from the beginning to the end of the change; calculating the difference between the set value and the actual value in each data item as a single index, and extracting the maximum deviation value, the adjustment time value and the oscillation frequency value of each single index; assigning a first order weight coefficient to each single index; assigning a second order weight coefficient according to the first order weight coefficient; and finally calculating the evaluation score according to a formula. The method is suitable for the formulation of the evaluation standard of the power unit control level.

Description

technical field [0001] The invention relates to a method for evaluating the quality of variable load coordinated control in thermal power plants, and belongs to the technical field of variable load coordinated control quality evaluation. 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 unit units are also getting higher and higher: the units 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 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 uni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/418
Inventor 柳行王焕然于立洋戎瑞于皓姚著
Owner 柳行
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