CN103439932B - Fired power generating unit automatic start-stop control system increases and decreases the method for breakpoint in running - 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 functional subgroup input/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 and shutdown processes 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 (breakpoints) in the program, that is, only when the APS runs to these fixed breakpoints, it will stop and wait for the inspection and confirmation of the operator. 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 general operation screen of the APS. Click this link to make the display screen display the input or exit status of each function group button of the APS. Add the function group "enabled" condition to the control permission conditions of each function group of APS described above, that is, when the button representing 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 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 makes the display screen display the button of each function subgroup under each function group and the input state or exit state of the button. 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 logic of the APS 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 selection" to the general operation screen of APS or the operation screen of each function group or the operation screen of each function subgroup " link, click this link, so that the display screen displays the selection status of the buttons that are mutually standby equipment under each functional subgroup, for example, the buttons and their selection statuses of "select oil pump A" and "select oil pump B" are displayed, wherein 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 "selected" to the control permission conditions of each mutual backup device 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 input or exit status of each function group button of the APS. Add the condition of "committed" of the function group to the control permission conditions of each function group of the above-mentioned APS;

(2) Add function subgroup input/exit function: continue to use the APS usage method provided by the above 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 makes the display screen display the button of each function subgroup under each function group and the input state or exit state of the button. 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 logic of the APS Programming: Add the condition of "committed" of this 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, add a "device selection" link on the APS general operation screen, click this link, and the display will display each function subgroup Lower the selection state of the buttons that are mutually standby equipment; use the APS usage method provided by the APS manufacturer to program the control logic of the APS: add the "selected" condition of the equipment to the control permission conditions of each mutually standby equipment.

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 the display will display The selection state of the buttons that are mutually standby 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 "selected" condition of the equipment to the control permission conditions of each mutually standby equipment .

Claims (1)

1. fired power generating unit automatic start-stop control system increases and decreases a method for breakpoint in running, and the method comprises the steps:

(1) input/exit function of function group, is increased: open the fired power generating unit automatic start-stop control system and APS waiting to increase and decrease breakpoint, according to the APS using method that this APS manufacturer provides, total operation screen of APS increases " function group is thrown and moved back " link, click this link, make display screen show input state or the exit status of APS each function group button, the default conditions of this button are input state; The APS using method continuing to use described APS manufacturer to provide carries out steering logic programming to this APS: in the control enabled condition of each function group of described APS, increase this function group " drop into " condition;

(2) input/exit function of function subgroup, is increased: continue the APS using method using above-mentioned APS manufacturer to provide, total operation screen of APS or the operation screen of each function group increase " function subgroup is thrown and moved back " link, click this link, make display screen show input state or the exit status of each function subgroup button and this button under each function group, the default conditions of this button are input state; The APS using method using APS manufacturer to provide proceeds steering logic programming to this APS: in the control enabled condition of each function subgroup, increase this function subgroup " drop into " condition;

(3) selection function of stand-by equipment each other, is increased: continue the APS using method using above-mentioned APS manufacturer to provide, the operation screen of total operation screen of APS or the operation screen of each function group or each function subgroup increases " equipment choice " link, click this link, make display screen show the selection mode of the button of stand-by equipment each other under each function subgroup; The APS using method that theres is provided of APS manufacturer is used to carry out steering logic programming to this APS: in the control enabled condition of each stand-by equipment each other, to increase this equipment " select " condition.