CN109857033B - Condensate throttling switching control method and device and computer equipment - Google Patents
Condensate throttling switching control method and device and computer equipment Download PDFInfo
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Abstract
The application relates to a condensate throttling switching control method and device and computer equipment. The method comprises the following steps: detecting the current operation load value of the thermal power generating unit when a condensed water throttling control input instruction is received; acquiring a difference value between a current operation load value and a target operation load value; the target operation load value is a load value which is expected to be reached by the thermal power generating unit; when the difference value is larger than the preset fluctuation threshold value, the condensate throttling switching control is put in, so that the condensate throttling switching control method can be matched with the operation load fluctuation state (represented by the difference value between the current operation load value and the target operation load value) of the thermal power generating unit with the stability of the condensate throttling switching control when the condensate throttling switching control is put in, and when the operation load fluctuation exceeds the preset fluctuation threshold value, the condensate throttling switching control is put in, so that the stability of the condensate throttling switching control is improved, and the safe and stable operation of the thermal power generating unit is further facilitated.
Description
Technical Field
The application relates to the technical field of condensate throttling frequency modulation, in particular to a condensate throttling switching control method, a condensate throttling switching control device and computer equipment.
Background
In recent years, the requirement of a power grid on frequency modulation and peak regulation performance of a power plant is higher and higher, at present, a throttle regulation mode is adopted for a part of 660-1000 MW (megawatt) steam turbine high-pressure regulating valves of ultra-supercritical thermal power generating units, the heat consumption of the steam turbine is increased by reducing the opening degree of the regulating valves, but the AGC (Automatic Gain Control) and primary frequency modulation capability of the unit are seriously influenced if the opening degree of the regulating valves is too large, and the assessment of the power grid is influenced. In addition, because the boiler heat storage capacity of the ultra-supercritical unit is far lower than that of a drum boiler, when the corresponding power grid frequency modulation and peak shaving requirements are met, the combustion rate regulation on the boiler side often cannot follow the load regulation on the steam turbine side, so that the major steam pressure, the major steam temperature, the reheated steam temperature and other key parameters of the boiler fluctuate greatly, and the safe and stable operation of the unit is influenced. And because the design of the throttling regulation mode is adopted by the steam turbine, the steam turbine regulating valve is required to be opened as large as possible under the steady state, the heat storage capacity at the boiler side is further compressed, and the variable load capacity of the ultra-supercritical unit is reduced.
In order to solve the above problems, a common technology at present is a condensate throttling frequency modulation technology. The condensate throttling frequency modulation technology is a new technology which gives consideration to the requirements of power grid frequency modulation and peak regulation and the unit variable load safety and economy, can make up for the defects of the current ultra-supercritical direct current unit coordination control system, and reconciles the contradiction between the unit operation economy and the power grid examination. This technique helps ultra supercritical once-through set not yet convert working medium power generation ability, boiler heat accumulation and not enough condition at the newly-increased fuel for unit power response, seeks the heat accumulation in the thermodynamic system beyond the boiler, compensates ultra supercritical once-through boiler heat accumulation ability not enough, however, in the realization process, the inventor finds that there is following problem at least in the conventional art: the condensate throttling switching control of the traditional condensate throttling frequency modulation technology is unstable, and the switching of the condensate throttling is influenced.
Disclosure of Invention
Therefore, in order to solve the above technical problems, it is necessary to provide a condensed water throttling switching control method, a condensed water throttling switching control device and a computer device, which can improve the stability of the condensed water throttling switching control.
A condensate throttling switching control method comprises the following steps:
detecting the current operation load value of the thermal power generating unit when a condensed water throttling control input instruction is received;
acquiring a difference value between a current operation load value and a target operation load value; the target operation load value is a load value which is expected to be reached by the thermal power generating unit;
and when the difference value is larger than a preset fluctuation threshold value, putting in condensed water throttling switching control.
In one embodiment, the method further comprises the following steps:
detecting the operation load variation trend of the thermal power generating unit when a condensed water throttling control input instruction is received;
when the difference value is larger than a preset fluctuation threshold value, the step of inputting condensed water throttling switching control comprises the following steps:
and when the difference value is larger than the preset fluctuation threshold value and the variation trend of the operation load is in an increasing trend, putting in the condensed water throttling switching control.
In one embodiment, the method further comprises the following steps:
detecting a valve position of a steam turbine regulating valve of the thermal power generating unit when a condensed water throttling control input instruction is received;
when the difference value is larger than a preset fluctuation threshold value, the step of inputting condensed water throttling switching control comprises the following steps:
and when the difference value is greater than a preset fluctuation threshold value, the variation trend of the operation load is in an increasing trend, and the valve position of the steam turbine valve is greater than a preset valve position threshold value, the condensed water is input for throttling switching control.
In one embodiment, when the difference is greater than the preset fluctuation threshold, the step of inputting the condensed water throttling switching control comprises:
and when the difference value is larger than a preset fluctuation threshold value, putting the condensed water into the device for throttling switching control within preset time.
In one embodiment, before the step of detecting the current operating load value of the thermal power generating unit when the condensed water throttling control input instruction is received, the method further comprises the following steps:
and detecting the operating parameters of the thermal power generating unit, and receiving a condensed water throttling control input instruction when the detected result is that the operating parameters are normal.
In one embodiment, the operating parameters include one or any combination of the following: the water level of the deaerator, the water level of the low-pressure heater, the water level of the condenser and the inlet pressure of the condensed water fine treatment system.
In one embodiment, the method further comprises the following steps:
detecting the operating condition of the thermal power generating unit;
and cutting off the condensed water throttling switching control when the detected result is that the operation condition is abnormal or the difference value is less than or equal to the preset fluctuation threshold value.
A condensate throttling switching control device comprises:
the detection module is used for detecting the current operation load value of the thermal power generating unit when a condensed water throttling control input instruction is received;
the operation module is used for acquiring a difference value between the current operation load value and the target operation load value; the target operation load value is a load value which is expected to be reached by the thermal power generating unit;
and the input control module is used for inputting the condensed water throttling switching control when the difference value is larger than a preset fluctuation threshold value.
A distributed control system comprising a memory and a processor, the memory storing a computer program which when executed by the processor effects the steps of:
detecting the current operation load value of the thermal power generating unit when a condensed water throttling control input instruction is received;
acquiring a difference value between a current operation load value and a target operation load value; the target operation load value is a load value which is expected to be reached by the thermal power generating unit;
and when the difference value is larger than a preset fluctuation threshold value, putting in condensed water throttling switching control.
A computer-readable storage medium, on which a computer program is stored which, when executed by a processor, carries out the steps of:
detecting the current operation load value of the thermal power generating unit when a condensed water throttling control input instruction is received;
acquiring a difference value between a current operation load value and a target operation load value; the target operation load value is a load value which is expected to be reached by the thermal power generating unit;
and when the difference value is larger than a preset fluctuation threshold value, putting in condensed water throttling switching control.
One of the above technical solutions has the following advantages and beneficial effects:
detecting the current operation load value of the thermal power generating unit when a condensed water throttling control input instruction is received; acquiring a difference value between a current operation load value and a target operation load value; when the difference value is larger than the preset fluctuation threshold value, the condensate throttling switching control is put into operation, wherein the target operation load value is a load value expected to be reached by the thermal power generating unit, so that the condensate throttling switching control method can effectively avoid the condensate throttling switching control caused by small-amplitude fluctuation of the unit load during normal operation of the thermal power generating unit during the condensate throttling switching control, and the condensate throttling switching control is put into operation only when the fluctuation of the operation load exceeds the preset fluctuation threshold value, so that the stability of the condensate throttling switching control is improved, and the safe and stable operation of the thermal power generating unit is further facilitated.
Drawings
FIG. 1 is a schematic diagram of a first flow of a condensate throttling switching control method in one embodiment;
FIG. 2 is a schematic flow chart illustrating the steps of receiving a condensed water throttle control input command according to an embodiment;
FIG. 3 is a second flow chart of a condensate throttling switching control method in one embodiment;
FIG. 4 is a third flow chart of a condensed water throttling switching control method in one embodiment;
FIG. 5 is a schematic flow chart illustrating the cut condensate throttling control step in one embodiment;
FIG. 6 is a first block diagram of a condensate throttling switching control device according to an embodiment;
FIG. 7 is a second block diagram of a condensed water throttling switching control device according to an embodiment;
FIG. 8 is a third block diagram of a condensed water throttling switching control device in an embodiment;
FIG. 9 is an internal block diagram of a distributed control system in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In order to solve the problem that the switching control of the condensate throttling is unstable and the switching of the condensate throttling is affected in the traditional condensate throttling frequency modulation technology, in one embodiment, as shown in fig. 1, a condensate throttling switching control method is provided, which comprises the following steps:
and step S110, detecting the current operation load value of the thermal power generating unit when the condensed water throttling control input instruction is received.
When the condensate throttling switching control method is actually implemented, the control interface of the distributed control system needs to be adjusted, namely buttons of 'condensate throttling control switching in' and 'condensate throttling control switching off' are additionally arranged on the control interface of the distributed control system. It should be noted that, in the prior art, a distributed control system is used for monitoring and controlling a thermal power generating unit.
When relevant workers click a 'condensed water throttling control input' button, the distributed control system receives a condensed water throttling control input instruction, detects the current operation load value of the thermal power generating unit and judges the fluctuation condition of the operation load value of the thermal power generating unit according to the current operation load value. And when the related staff clicks the 'condensed water throttling control cutting' button, the distributed control system receives a condensed water throttling control cutting instruction and cuts off the condensed water throttling control. The condensate throttle control input command is an initial condition for executing the steps of the present application.
In a specific embodiment, as shown in fig. 2, before the step of detecting the current operating load value of the thermal power generating unit when the condensed water throttling control input command is received, the method further includes the steps of:
and step S210, detecting the operating parameters of the thermal power generating unit, and receiving a condensed water throttling control input instruction when the detected result is that the operating parameters are normal.
It should be noted that, in one example, the operation parameters include one or any combination of the following parameters: the water level of the deaerator, the water level of the low-pressure heater, the water level of the condenser and the inlet pressure of the condensed water fine treatment system.
In order to avoid the problem that the operating parameters are out of limit due to continuous condensed water throttling control, the operating parameters are recovered to be normal at a certain time interval after the condensed water throttling control is performed for the next condensed water throttling control.
Step S120, obtaining the difference value between the current operation load value and the target operation load value; the target operation load value is a load value which is expected to be reached by the thermal power generating unit.
The target operation load value is a load value which is reached by a distributed control system instruction thermal power generating unit, namely the distributed control system sends a unit load instruction to the thermal power generating unit, and the thermal power generating unit meets the unit load instruction by adjusting the unit operation state (comprising measures such as main steam valve opening adjustment, fuel adjustment and condensed water throttling control). When no unit load instruction exists, the operation load value of the thermal power unit fluctuates within a small amplitude range, and only when the fluctuation amplitude exceeds a preset fluctuation threshold value, the thermal power unit is considered to send a load adjustment instruction, so that the distributed control system can put in condensate throttling switching control according to the load adjustment instruction. By detecting the current operation load value and adopting the difference value between the current operation load value and the target operation load value to represent the fluctuation condition of the operation load value of the thermal power generating unit, the condensate water throttling switching control caused by small-amplitude fluctuation of the unit load during normal operation of the thermal power generating unit can be effectively avoided.
And S130, when the difference value is larger than a preset fluctuation threshold value, putting in the condensed water throttling switching control.
The method comprises the steps of setting a preset fluctuation threshold value in a distributed control system in advance, and when a difference value is larger than the preset fluctuation threshold value, namely the fluctuation condition of the operation load value of the thermal power generating unit exceeds the preset fluctuation threshold value, putting in condensate throttling switching control. It should be noted that the preset fluctuation threshold may be determined according to actual needs. In one example, the preset fluctuation threshold may be 3MW (megawatts), 5MW, or 8 MW.
Because the main characteristics of the condensate throttling control are that the response time is short, the adjusting speed is accelerated, but the adjusting time and the adjusting range are limited, the adjusting process of the boiler-turbine coordinated control system of the thermal power generating unit is opposite to the adjusting process of the condensate throttling control, and the two can be well complemented, in order to well play the role of the condensate throttling control, in a specific embodiment, when the difference value is greater than the preset fluctuation threshold value, the step of putting the condensate throttling switching control comprises the following steps: and when the difference value is larger than a preset fluctuation threshold value, putting the condensed water into the device for throttling switching control within preset time. The preset time is the time when the thermal power generating unit can completely respond to the load instruction sent by the distributed control system. Specifically, the effective time of the condensate throttling control is set in the preset time, the thermal power generating unit can quickly respond to a load instruction within the preset time, a dead zone is crossed out of the adjustment, then the load adjustment and compensation are carried out by the mechanical furnace coordinated control system, at the moment, the condensate throttling control is cut off, the deaerator of the thermal power generating unit is replenished with water, and preparation is made for the next condensate throttling control. In one example, the preset time is 60s (seconds).
In each embodiment of the condensed water throttling switching control method, when a condensed water throttling control input instruction is received, the current operation load value of the thermal power generating unit is detected; acquiring a difference value between a current operation load value and a target operation load value; when the difference value is larger than the preset fluctuation threshold value, the condensate throttling switching control is put into use, wherein the target operation load value is a load value which is expected to be reached by the thermal power generating unit, so that the condensate throttling switching control method can effectively avoid the condensate throttling switching control caused by small-amplitude fluctuation of the unit load when the thermal power generating unit is in normal operation when the condensate throttling switching control is put into use, and the condensate throttling switching control is put into use only when the fluctuation of the operation load exceeds the preset fluctuation threshold value, so that the stability of the input condensate throttling switching control is improved, and the safe and stable operation of the thermal power generating unit is further facilitated.
In one embodiment, as shown in fig. 3, the method further comprises the steps of:
step S310, detecting the operation load change trend of the thermal power generating unit when a condensed water throttling control input instruction is received;
step S320, obtaining the difference value between the current operation load value and the target operation load value; the target operation load value is a load value which is expected to be reached by the thermal power generating unit;
when the difference value is larger than a preset fluctuation threshold value, the step of inputting condensed water throttling switching control comprises the following steps:
and step S330, when the difference value is larger than the preset fluctuation threshold value and the variation trend of the operation load is in an increasing trend, putting in the condensed water throttling switching control.
It should be noted that step S320 in fig. 3 is the same as step S120 in fig. 1, and is not described again here.
In this embodiment, when the distributed control system receives the condensed water throttling control input instruction, the distributed control system not only needs to detect the current operating load value of the thermal power generating unit, but also needs to detect the operating load variation trend of the thermal power generating unit.
It should be noted that the operation load variation trend is the operation load variation condition of the thermal power generating unit under the adjustment of the distributed control system. In one example, the operation load variation trend is obtained by calculating a difference value between a target operation load value and a unit load instruction sent by the distributed control system. And the unit load instruction is used for instructing the thermal power generating unit to adjust the operation load to a load value specified by the unit load instruction.
Specifically, the operation load variation trend can be divided into a reduction trend or an increase trend, wherein the reduction trend refers to that the operation load of the thermal power generating unit is reduced under the adjustment of the distributed control system, and under the trend, as long as the boiler combustion feedforward is proper, the steam turbine regulating valve is closed from 50% of opening degree, the accuracy and the time for controlling the operation load are guaranteed, so that the operation load can be controlled by the condensate throttling control without considering the reduction trend of the operation load.
And the operation load control by the condensate throttling control in consideration of the increasing tendency of the operation load is required. Namely, under the condition that the difference value is larger than the preset fluctuation threshold value and the variation trend of the operation load is in an increasing trend, the condensed water throttling switching control is put into operation.
According to the condensate throttling switching control method, the operating load change trend influencing the condensate throttling switching control stability is used as a limiting condition for the input condensate throttling switching control, factors influencing the condensate throttling switching control stability are avoided more comprehensively, the stability of the input condensate throttling switching control is further improved, meanwhile, the requirements of grid frequency modulation and peak regulation and the requirements of variable load safety and economy of a thermal power generating unit are better met, the defects of a current ultra-supercritical direct current unit coordinated control system are overcome, the contradiction between the operating economy of a blending unit and grid check is overcome, the unit power response speed is accelerated, and the requirements of power plant frequency modulation and peak regulation performance are better met.
In one embodiment, as shown in fig. 4, further comprising the steps of:
step S410, detecting a valve position of a steam turbine regulating valve of the thermal power generating unit when a condensed water throttling control input instruction is received;
step S420, obtaining a difference value between the current operation load value and the target operation load value; the target operation load value is a load value which is expected to be reached by the thermal power generating unit;
when the difference value is larger than a preset fluctuation threshold value, the step of inputting condensed water throttling switching control comprises the following steps:
and step S430, when the difference value is greater than a preset fluctuation threshold value, the variation trend of the operation load is in an increasing trend, and the valve position of the steam turbine regulating valve is greater than a preset valve position threshold value, putting in condensate throttling switching control.
It should be noted that step S420 in fig. 4 is the same as step S120 in fig. 1, and is not described again here.
In this embodiment, when the distributed control system receives the condensed water throttling control input instruction, the distributed control system needs to detect not only the current operating load value of the thermal power generating unit, but also the operating load variation trend of the thermal power generating unit, and also needs to detect the steam turbine regulating valve position of the thermal power generating unit.
It should be noted that, under the condition that the opening degree of the steam turbine throttle valve is small, after the condensate throttling control is performed, the power of the thermal power generating unit may rise to exceed the load value specified by the unit load instruction, at this time, the steam turbine throttle valve is closed, both closing the steam turbine throttle valve and the condensate throttling control will affect the actual power of the thermal power generating unit, in order to reduce the influence of the two operation quantities on the actual power of the thermal power generating unit, in this embodiment, the steam turbine throttle valve position is further used as a limiting condition for the condensate throttling control, and the condensate throttling switching control is only put into operation when the steam turbine throttle valve position exceeds a preset valve position threshold value. The preset valve position threshold value can be determined according to actual requirements, and in one example, the preset valve position threshold value is 75% of opening degree.
According to the condensate throttling switching control method, the steam turbine regulating valve position influencing the condensate throttling switching control stability is used as a limiting condition for putting in condensate throttling switching control, so that the factors influencing the condensate throttling control switching are comprehensively considered, the phenomenon that the operation of a thermal power unit is unstable in the condensate throttling control process due to incomplete consideration of the influencing factors is avoided, meanwhile, the limiting condition for putting in condensate throttling control is increased, and the influence on the normal operation of the thermal power unit due to unnecessary putting in of the condensate throttling control is reduced.
The input condensate throttling control is to meet the requirement of frequency modulation and peak regulation of a power grid, the input condensate throttling control is allowed only under the condition that the operation state of a thermal power unit is normal, and under the condition that the operation state of the thermal power unit is abnormal, the frequency modulation and peak regulation of the power grid cannot be realized through the condensate throttling control, but the condensate throttling control needs to be removed, and in one embodiment, as shown in fig. 5, the input condensate throttling control further comprises the following steps:
step S510, detecting the operation condition of the thermal power generating unit;
and step S520, cutting off the condensed water throttling switching control when the detected result is that the operation condition is abnormal or the difference value is less than or equal to the preset fluctuation threshold value.
It should be noted that the operation condition is an operation condition of each device in the thermal power generating unit. Specifically, the operation conditions include the operation conditions of equipment such as the condensate polishing inlet pressure, the water level of the low-pressure heater, the operation number of condensate pumps, the load capacity specified by a unit load instruction, the flow rate of condensate, the water level of a condenser hot well, the water level of a deaerator, the state of a low-pressure bypass valve, and a minimum flow regulating valve for condensate.
And when the operation condition is abnormal, cutting off the condensed water and carrying out throttling switching control. Specifically, when the operation work satisfies any one of the following conditions: the method is characterized in that the condensate fine treatment inlet pressure is low, the water level of a low-pressure heater is high or low, 2 or 0 condensate pumps are in operation, the unit load instruction MWD is lower than 50% full load, the condensate flow is high or low, the water level of a hot well of a condenser is high or low, the water level of a deaerator is high or low, a low-pressure bypass valve is in an open state, a condensate minimum flow regulating valve is in manual control, and the operation working condition is abnormal.
The above description only shows that the operation condition is abnormal, and the condensate water throttling control is also cut off when one or any combination of the following conditions occur: the difference value is less than or equal to a preset fluctuation threshold value, the variation trend of the operation load is not increased, and the valve position of the steam turbine regulating valve is less than or equal to a preset valve position threshold value.
According to the condensate throttling switching control method, in order to avoid unnecessary investment of condensate throttling control, the condensate throttling control is cut off under the condition that the condition is met, and the condensate throttling control can be cut off under the specific condition that one or any combination of the following conditions is met: and the difference value is less than or equal to a preset fluctuation threshold value, the operation load variation trend is not increased, the valve position of the steam turbine regulating valve is less than or equal to a preset valve position threshold value, the operation condition is abnormal, and the condensate throttling control is cut off, so that the misoperation that the condensate throttling control is not put into can be reduced to the greatest extent, and the safe and reliable operation of the thermal power generating unit is ensured.
It should be understood that although the various steps in the flow charts of fig. 1-5 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 1-5 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternating with other steps or at least some of the sub-steps or stages of other steps.
In one embodiment, as shown in fig. 6, there is provided a condensate throttling switching control device, including:
the detection module 61 is used for detecting the current operation load value of the thermal power generating unit when the condensed water throttling control input instruction is received;
the operation module 63 is configured to obtain a difference value between the current operation load value and the target operation load value; the target operation load value is a load value which is expected to be reached by the thermal power generating unit;
and the input control module 65 is used for inputting the condensed water throttling switching control when the difference value is greater than the preset fluctuation threshold value.
In one embodiment, the detection module 61 is further configured to detect an operation load variation trend of the thermal power generating unit when the condensed water throttling control input instruction is received;
and the input control module 65 is further configured to input the condensed water throttling switching control when the difference value is greater than the preset fluctuation threshold value and the operation load variation trend is an increasing trend.
In one embodiment, the detection module 61 is further configured to detect a steam turbine throttle valve position of the thermal power generating unit when the condensed water throttling control input instruction is received;
and the input control module 65 is further configured to input the condensed water for throttling switching control when the difference value is greater than the preset fluctuation threshold value, the operation load variation trend is an increasing trend, and the steam turbine throttle valve position is greater than the preset valve position threshold value.
In an embodiment, the input control module 65 is further configured to input the condensed water throttling switching control within a preset time when the difference is greater than a preset fluctuation threshold.
In one embodiment, as shown in fig. 7, the condensed water throttling switching control device further includes:
and the instruction receiving module 71 is configured to detect an operating parameter of the thermal power generating unit, and receive a condensed water throttling control input instruction when the detected result is that the operating parameter is normal.
In one embodiment, as shown in fig. 8, the condensed water throttling switching control device further includes:
the cutting control module 81 is used for detecting the operation condition of the thermal power generating unit; and cutting off the condensed water throttling switching control when the detected result is that the operation condition is abnormal or the difference value is less than or equal to the preset fluctuation threshold value.
For the specific limitation of the condensate throttling switching control device, reference may be made to the above limitation on the condensate throttling switching control method, and details are not described herein again. All or part of the modules in the condensed water throttling switching control device can be realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a distributed control system is provided, the internal structure of which may be as shown in fig. 9. The distributed control system comprises a processor, a memory, a network interface, a display screen and an input device which are connected through a system bus. Wherein the processor of the distributed control system is configured to provide computational and control capabilities. The memory of the distributed control system comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The network interface of the distributed control system is used for communicating with an external terminal through network connection. The computer program is executed by a processor to implement a condensate throttling switching control method. The display screen of the distributed control system can be a liquid crystal display screen or an electronic ink display screen, and the input device of the distributed control system can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the distributed control system, an external keyboard, a touch pad or a mouse and the like.
Those skilled in the art will appreciate that the architecture shown in fig. 9 is a block diagram of only a portion of the architecture associated with the subject application and does not constitute a limitation on the distributed control system to which the subject application applies, and that a particular distributed control system may include more or fewer components than shown, or combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided, comprising a memory and a processor, the memory having a computer program stored therein, the processor implementing the following steps when executing the computer program:
detecting the current operation load value of the thermal power generating unit when a condensed water throttling control input instruction is received;
acquiring a difference value between a current operation load value and a target operation load value; the target operation load value is a load value which is expected to be reached by the thermal power generating unit;
and when the difference value is larger than a preset fluctuation threshold value, putting in condensed water throttling switching control.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
detecting the operation load variation trend of the thermal power generating unit when a condensed water throttling control input instruction is received;
and when the difference value is larger than the preset fluctuation threshold value and the variation trend of the operation load is in an increasing trend, putting in the condensed water throttling switching control.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
detecting a valve position of a steam turbine regulating valve of the thermal power generating unit when a condensed water throttling control input instruction is received;
and when the difference value is greater than a preset fluctuation threshold value, the variation trend of the operation load is in an increasing trend, and the valve position of the steam turbine valve is greater than a preset valve position threshold value, the condensed water is input for throttling switching control.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
and when the difference value is larger than a preset fluctuation threshold value, putting the condensed water into the device for throttling switching control within preset time.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
and detecting the operating parameters of the thermal power generating unit, and receiving a condensed water throttling control input instruction when the detected result is that the operating parameters are normal.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
detecting the operating condition of the thermal power generating unit;
and cutting off the condensed water throttling switching control when the detected result is that the operation condition is abnormal or the difference value is less than or equal to the preset fluctuation threshold value.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
detecting the current operation load value of the thermal power generating unit when a condensed water throttling control input instruction is received;
acquiring a difference value between a current operation load value and a target operation load value; the target operation load value is a load value which is expected to be reached by the thermal power generating unit;
and when the difference value is larger than a preset fluctuation threshold value, putting in condensed water throttling switching control.
In one embodiment, the computer program when executed by the processor further performs the steps of:
detecting the operation load variation trend of the thermal power generating unit when a condensed water throttling control input instruction is received;
and when the difference value is larger than the preset fluctuation threshold value and the variation trend of the operation load is in an increasing trend, putting in the condensed water throttling switching control.
In one embodiment, the computer program when executed by the processor further performs the steps of:
detecting a valve position of a steam turbine regulating valve of the thermal power generating unit when a condensed water throttling control input instruction is received;
and when the difference value is greater than a preset fluctuation threshold value, the variation trend of the operation load is in an increasing trend, and the valve position of the steam turbine valve is greater than a preset valve position threshold value, the condensed water is input for throttling switching control.
In one embodiment, the computer program when executed by the processor further performs the steps of:
and when the difference value is larger than a preset fluctuation threshold value, putting the condensed water into the device for throttling switching control within preset time.
In one embodiment, the computer program when executed by the processor further performs the steps of:
and detecting the operating parameters of the thermal power generating unit, and receiving a condensed water throttling control input instruction when the detected result is that the operating parameters are normal.
In one embodiment, the computer program when executed by the processor further performs the steps of:
detecting the operating condition of the thermal power generating unit;
and cutting off the condensed water throttling switching control when the detected result is that the operation condition is abnormal or the difference value is less than or equal to the preset fluctuation threshold value.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A condensate throttling switching control method is characterized by comprising the following steps:
detecting the current operation load value of the thermal power generating unit when a condensed water throttling control input instruction is received;
acquiring a difference value between the current operation load value and a target operation load value; the target operation load value is a load value expected to be reached by the thermal power generating unit;
when the difference value is larger than a preset fluctuation threshold value, putting in condensed water for throttling switching control;
further comprising the steps of:
detecting the operation load variation trend of the thermal power generating unit when the condensed water throttling control input instruction is received;
when the difference value is larger than a preset fluctuation threshold value, the step of inputting condensed water throttling switching control comprises the following steps:
and when the difference value is larger than the preset fluctuation threshold value and the variation trend of the running load is in an increasing trend, putting in condensate throttling switching control.
2. The condensed water throttling switching control method according to claim 1, further comprising the steps of:
detecting a valve position of a turbine regulating valve of the thermal power generating unit when the condensed water throttling control input instruction is received;
when the difference value is larger than a preset fluctuation threshold value, the step of inputting condensed water throttling switching control comprises the following steps:
and when the difference value is greater than the preset fluctuation threshold value, the change trend of the running load is in an increasing trend, and the valve position of the steam turbine regulating valve is greater than the preset valve position threshold value, putting in condensate throttling switching control.
3. The condensate throttling-switching control method according to claim 1, wherein when the difference is greater than a preset fluctuation threshold, the step of putting into condensate throttling-switching control comprises:
and when the difference value is larger than the preset fluctuation threshold value, putting in condensed water for throttling switching control within preset time.
4. The condensate throttling switching control method according to any one of claims 1 to 3, wherein before the step of detecting the current operating load value of the thermal power generating unit when the condensate throttling control input instruction is received, the method further comprises the steps of:
and detecting the operating parameters of the thermal power generating unit, and receiving the condensed water throttling control input instruction when the detected result is that the operating parameters are normal.
5. The condensate throttling switching control method according to claim 4, wherein the operation parameters include one or any combination of the following parameters: the water level of the deaerator, the water level of the low-pressure heater, the water level of the condenser and the inlet pressure of the condensed water fine treatment system.
6. The condensed water throttling switching control method according to claim 4, further comprising the steps of:
detecting the operating condition of the thermal power generating unit;
and cutting off the condensed water throttling switching control when the detected result is that the operation working condition is abnormal or the difference value is less than or equal to the preset fluctuation threshold value.
7. The utility model provides a condensate water throttling switching controlling means which characterized in that includes:
the detection module is used for detecting the current operation load value of the thermal power generating unit when a condensed water throttling control input instruction is received; the system is also used for detecting the operation load change trend of the thermal power generating unit when the condensed water throttling control input instruction is received;
the operation module is used for acquiring a difference value between the current operation load value and a target operation load value; the target operation load value is a load value expected to be reached by the thermal power generating unit;
and the input control module is used for inputting the condensed water for throttling switching control when the difference value is greater than a preset fluctuation threshold value and the variation trend of the operation load is in an increasing trend.
8. The condensed water throttling switching control device according to claim 7, further comprising:
and the instruction receiving module is used for detecting the operating parameters of the thermal power generating unit and receiving the condensed water throttling control input instruction when the detected result is that the operating parameters are normal.
9. A distributed control system comprising a memory and a processor, the memory storing a computer program, wherein the processor when executing the computer program implements the steps of the method of any one of claims 1 to 6.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 6.
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| CN111120992B (en) * | 2019-12-05 | 2022-04-12 | 国网河北省电力有限公司电力科学研究院 | Thermal energy storage system for enhancing unit operation flexibility and peak shaving output evaluation method |
| CN112308302B (en) * | 2020-10-22 | 2024-04-19 | 新奥数能科技有限公司 | Boiler operation load parameter adjustment method and device, electronic equipment and storage medium |
| CN112539089B (en) * | 2020-11-10 | 2023-03-28 | 北方魏家峁煤电有限责任公司 | Low-voltage bypass control method and device and electronic equipment |
| CN113031681B (en) * | 2021-03-03 | 2022-04-15 | 江苏南通发电有限公司 | Condensation depth frequency conversion optimization method for thermal generator set |
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