CN103439932A - Method for increasing and decreasing breaking points in operation of automatic starting and stopping control system of thermal power generating unit - Google Patents

Abstract

The invention introduces a method for increasing or decreasing breakpoints in the operation of the automatic start-stop control system of a thermal power unit. The method includes the following steps: (1) increasing the input/exit function of the functional group; (2) increasing the input of the functional subgroup /exit function; (3) increase the selection function of mutual backup equipment. In this method, on the operation screen, an input/exit or selection button is added to each function group, function subgroup, and mutual backup equipment in the automatic start-stop control system of the thermal power unit; Add or subtract breakpoints during operation, temporarily put in or exit any function group or function subgroup in the APS, or choose one of the equipment as a backup for each other, so that the APS will automatically stop when it needs to be intervened, and wait for the operator to check and confirm, greatly improving It improves the adaptability and operability of APS.

Description

The Method of Increasing and Decreasing Breakpoints in the Operation of Automatic Start-Stop Control System of Thermal Power Units

technical field

The invention belongs to the technical field of automatic control of thermal power units, and in particular relates to a method for increasing or decreasing breakpoints during operation of an automatic start-stop control system of thermal power units.

Background technique

APS (the abbreviation of "automatic plant startup and shutdown control system" in English, and the Chinese translation is "automatic start-stop control system for thermal power units") adopts a layered design, which divides the start-up process and shutdown process of thermal power units into several functional groups. A functional group is divided into several functional subgroups, and the functional subgroups directly control the field devices. The APS can automatically complete the entire start-up process and shutdown process of the thermal power unit according to the preset program only by the operator's simple inspection and confirmation. At present, APS has become more and more mature, and has gradually become a widely used technology for new large-scale thermal power units.

However, currently known APSs at home and abroad are pre-designed with fixed breakpoints in the program, that is, only when the APS runs to these fixed breakpoints, it will stop and wait for the operator to check and confirm. With the continuous expansion of the capacity of large thermal power units, the continuous increase of auxiliary equipment and the increasing complexity of the process system, it is more and more common that auxiliary equipment temporarily fails or the process system temporarily requires manual intervention during the start-up and shutdown of thermal power units. . Therefore, the known method of preset fixed breakpoints in the APS program cannot enable the operator to perform manual intervention in time during the operation of the APS, thus causing the operator to be unwilling or even abandon the use of the APS.

Contents of the invention

The technical problem to be solved by the present invention is to provide a method for increasing or decreasing breakpoints during the operation of the automatic start-stop control system of thermal power units in view of the defects in the prior art. Using this method, the operator can temporarily increase or decrease breakpoints according to the temporary needs of auxiliary equipment and process systems during the operation of the APS. In this way, when the APS runs to a step that requires intervention, it will automatically pause, waiting for the operator's inspection and confirmation, thereby improving the adaptability and operability of the APS.

The technical solution of the present invention is that the method for increasing or decreasing breakpoints in the operation of the above-mentioned thermal power unit automatic start-stop control system provided includes the following steps:

(1) Increase the input/exit function of the function group: open the automatic start-stop control system of the thermal power unit that is to be increased or decreased, that is, APS. According to the APS usage method provided by the APS manufacturer, add a link of "Functional Group Switching and Canceling" on the APS general operation screen. Click this link to make the display screen display the buttons of each function group of the APS and their input or exit status. The default state of the button is the input state; continue to use the APS usage method provided by the APS manufacturer to program the control logic of the APS: in In the control permission condition of each function group of the APS, the function group "has been put into use" condition is added, that is, when the button that is set to represent the function group input is not pressed, the function group will not be allowed to execute;

(2) Add function subgroup input/exit function: continue to use the APS usage method provided by the above-mentioned APS manufacturer, add a link of "function subgroup input and withdrawal" on the general operation screen of APS or the operation screen of each function group, Click this link to make the display screen display the buttons of each function subgroup under each function group and the button’s input or exit status. The default state of the button is the input state; use the APS usage method provided by the APS manufacturer to continue to control the APS Logic programming: Add the function subgroup "enabled" condition to the control permission conditions of each function subgroup, that is, when the button representing the function subgroup input is not pressed, the function subgroup will not be allowed to execute;

(3) Increase the selection function of mutual backup equipment: continue to use the APS usage method provided by the above-mentioned APS manufacturer, and add "device Select” link, click on the link, the display screen will display the buttons and their selection status of each other’s backup equipment under each functional subgroup, for example, the buttons of “select oil pump A” and “select oil pump B” and their selection status will be displayed, among which the oil pump A. Oil pump B is mutual backup, and only one of them needs to be started during normal operation; use the APS usage method provided by the APS manufacturer to program the control logic of the APS: add the device "already activated" to the control permission conditions of each backup device Selection" condition, that is, when the button representing the device selection is not pressed, the control command of the device will not be allowed to execute.

The technical core of the present invention is: using the method provided by the APS manufacturer, on the operation screen, each function group, function subgroup, and mutual backup equipment in the thermal power unit automatic start-stop control system have added a switch or selection button, And the status display of switching and selection; and use the method provided by the APS manufacturer to carry out control logic programming, and add the function group, function subgroup, mutual backup equipment to the control allowable conditions of each function group, function subgroup, and mutual Is the "committed" or "selected" condition for the spare device.

The beneficial effects of the present invention are: using the method, the operator can increase or decrease breakpoints during the operation of the automatic start-stop control system of thermal power units, and can temporarily increase or decrease breakpoints according to the temporary needs of auxiliary equipment and process systems. That is, temporarily put into or quit any function group or function subgroup in the APS, or temporarily select any one of the equipment that is a backup for each other, so that the APS will pause when it reaches the step that needs to be intervened, and wait for the operator to check and confirm, which greatly improves the performance of the APS. Adaptability and operability.

Detailed ways

Example 1:

(1) Increase the input/exit function of the function group: open the automatic start-stop control system of the thermal power unit that is to be increased or decreased, that is, APS. According to the APS usage method provided by the APS manufacturer, add a link of "Functional Group Switching and Canceling" on the general operation screen of the APS. Click this link to make the display screen display the buttons of each function group of the APS and their input or exit status. The default state of the button is the input state; continue to use the APS usage method provided by the APS manufacturer to program the control logic of the APS: in Add the function group "committed" condition to the control permission conditions of each function group of the APS;

(2) Add function subgroup input/exit function: continue to use the APS usage method provided by the above-mentioned APS manufacturer, add a link of "function subgroup input and withdrawal" on the general operation screen of APS or the operation screen of each function group, Click this link to make the display screen display the buttons of each function subgroup under each function group and the button’s input or exit status. The default state of the button is the input state; use the APS usage method provided by the APS manufacturer to continue to control the APS Logic programming: Add the condition of "committed" of each function subgroup to the control permission condition of each function subgroup;

(3) Add the selection function of mutual backup equipment: continue to use the APS usage method provided by the above-mentioned APS manufacturer, add a "device selection" link on the general operation screen of the APS, click this link, and the display screen will display each function sub- The button and its selection state of the mutual backup device under the group; use the APS usage method provided by the APS manufacturer to program the control logic of the APS: add the "selected" condition of the device to the control permission conditions of each mutual backup device.

Example 2:

Steps (1)-(2) are the same as in Example 1.

(3) Increase the selection function of mutual backup equipment: continue to use the APS usage method provided by the above-mentioned APS manufacturer, add a "device selection" link on the operation screen of each function subgroup of the APS, click this link, and make the display screen Display the buttons and their selection status of mutual backup equipment under each functional subgroup; use the APS usage method provided by the APS manufacturer to program the control logic of the APS: add the device "selected" to the control permission conditions of each mutual backup equipment "condition.

Claims (1)

1. A method for increasing or decreasing breakpoints in the automatic start-stop control system operation of a thermal power unit, the method may further comprise the steps: (1) Increase the input/exit function of the function group: open the automatic start-stop control system of the thermal power unit that is to be increased or decreased, that is, the APS, and according to the APS usage method provided by the APS manufacturer, on the general operation screen of the APS, add Click on the link of "Functional Group Switching and Canceling" to make the display screen display the APS function group buttons and their input or exit status. The APS carries out control logic programming: add the condition of "committed" of the function group to the control permission conditions of each function group of the APS; (2) Add function subgroup input/exit function: continue to use the APS usage method provided by the above-mentioned APS manufacturer, add a link of "function subgroup input and withdrawal" on the general operation screen of APS or the operation screen of each function group, Click this link to make the display screen display the buttons of each function subgroup under each function group and the button’s input or exit status. The default state of the button is the input state; use the APS usage method provided by the APS manufacturer to continue to control the APS Logic programming: Add the condition of "committed" of each function subgroup to the control permission condition of each function subgroup; (3) Increase the selection function of mutual backup equipment: continue to use the APS usage method provided by the above-mentioned APS manufacturer, and add "device Select" link, click this link, so that the display screen displays the buttons and their selection status of the mutual backup equipment under each functional subgroup; use the APS usage method provided by the APS manufacturer to program the control logic of the APS: in each of the mutual backup equipment Add the device "selected" condition to the control permission condition.