CN114326380B - Method and device for adjusting generator load of steam turbine - Google Patents
Method and device for adjusting generator load of steam turbine Download PDFInfo
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Abstract
The application discloses a method and a device for adjusting the load of a generator of a steam turbine, wherein the method comprises the following steps: acquiring the real-time rotating speed of the steam turbine; determining a rotating speed difference value between a preset rotating speed and a real-time rotating speed, and generating a load instruction corresponding to the rotating speed difference value; according to the load instruction, the load of a generator of the steam turbine is adjusted; under the condition that the rotating speed difference value is positive, the load instruction is positive, the load of the generator of the steam turbine is indicated to gradually increase from the real-time load to the preset load in a first preset time, and gradually decrease from the preset load to the real-time load in a third preset time, wherein the first preset time is smaller than the third preset time; and under the condition that the rotating speed difference value is negative, the load instruction is negative, the load of the generator of the steam turbine is indicated to gradually decrease from the real-time load to the preset load in a fourth preset time, and gradually increase from the preset load to the real-time load in a sixth preset time, wherein the fourth preset time is smaller than the sixth preset time.
Description
Technical Field
The application relates to the field of thermal power generation, in particular to a method and a device for adjusting the load of a generator of a steam turbine.
Background
The primary frequency modulation function of the thermal power plant is important to maintaining the stability of the power grid frequency. If the primary frequency modulation function of the power plant cannot exert the due function, the waste of the frequency-stabilized resource in the power grid is caused, and the power plant is also an unsafe regulating loop.
In the related art, a primary frequency modulation command generating logic at a coordination control system (coordinated control system, CCS) side generally converts a corresponding load correction amount through a broken line function according to a rotation speed difference signal, generates a final frequency modulation command through limiting of upper and lower limiting degrees, is overlapped on a unit load command and is sent to a main control of a steam turbine, and adjusts the load of a generator of the steam turbine, so that the problem that the speed of responding to primary frequency modulation of a power grid is slow exists.
Disclosure of Invention
The application discloses a method and a device for adjusting the load of a generator of a steam turbine, which are used for solving the problem of slower speed of responding to primary frequency modulation of a power grid.
In order to solve the problems, the application adopts the following technical scheme:
In a first aspect, an embodiment of the present application provides a method for adjusting a generator load of a steam turbine, including: acquiring the real-time rotating speed of the steam turbine; determining a rotating speed difference value between a preset rotating speed and the real-time rotating speed, and generating a load instruction corresponding to the rotating speed difference value, wherein the rotating speed difference value and the load instruction have a corresponding relation in a primary frequency modulation function; according to the load instruction, the load of the generator of the steam turbine is adjusted; the load instruction is positive and indicates that the load of the generator of the steam turbine gradually increases from a real-time load to a preset load in a first preset time when the rotating speed difference is positive, and gradually decreases from the preset load to the real-time load in a third preset time after the preset load continues for a second preset time, wherein the real-time load is the load of the generator of the steam turbine corresponding to the real-time rotating speed, the preset load is the load of the generator of the steam turbine corresponding to the preset rotating speed, and the first preset time is less than the third preset time; and under the condition that the rotating speed difference value is negative, the load instruction is negative, the load of the generator of the steam turbine is indicated to gradually decrease from the real-time load to a preset load in a fourth preset time, and after the preset load continues for a fifth preset time, the load is gradually increased from the preset load to the real-time load in a sixth preset time, wherein the fourth preset time is smaller than the sixth preset time.
In a second aspect, an embodiment of the present application provides an apparatus for adjusting a generator load of a steam turbine, including: the acquisition module is used for acquiring the real-time rotating speed of the steam turbine; the generating module is used for determining a rotating speed difference value between a preset rotating speed and the real-time rotating speed and generating a load instruction corresponding to the rotating speed difference value, wherein the rotating speed difference value and the load instruction have a corresponding relation in a primary frequency modulation function; the adjusting module is used for adjusting the load of the generator of the steam turbine according to the load instruction; the load instruction is positive and indicates that the load of the generator of the steam turbine gradually increases from a real-time load to a preset load in a first preset time when the rotating speed difference is positive, and gradually decreases from the preset load to the real-time load in a third preset time after the preset load continues for a second preset time, wherein the real-time load is the load of the generator of the steam turbine corresponding to the real-time rotating speed, the preset load is the load of the generator of the steam turbine corresponding to the preset rotating speed, and the first preset time is less than the third preset time; and under the condition that the rotating speed difference value is negative, the load instruction is negative, the load of the generator of the steam turbine is indicated to gradually decrease from the real-time load to a preset load in a fourth preset time, and after the preset load continues for a fifth preset time, the load is gradually increased from the preset load to the real-time load in a sixth preset time, wherein the fourth preset time is smaller than the sixth preset time.
In a third aspect, an embodiment of the present application provides an electronic device comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the method as described in the first aspect.
In a fourth aspect, embodiments of the present application provide a readable storage medium having stored thereon a program or instructions which when executed by a processor perform the steps of the method according to the first aspect.
In a fifth aspect, an embodiment of the present application provides a chip, where the chip includes a processor and a communication interface, where the communication interface is coupled to the processor, and where the processor is configured to execute a program or instructions to implement a method according to the first aspect.
In a sixth aspect, embodiments of the present application provide a computer program product stored in a storage medium, the program product being executable by at least one processor to implement the method according to the first aspect.
The embodiment of the application provides a method for adjusting the load of a generator of a steam turbine, which comprises the steps of obtaining the real-time rotating speed of the steam turbine, determining the rotating speed difference between a preset rotating speed and the real-time rotating speed, generating a load instruction corresponding to the rotating speed difference, adjusting the load of the generator of the steam turbine according to the load instruction, wherein the load of the generator of the steam turbine is gradually increased from the real-time load to the preset load in a first preset time when the rotating speed difference is positive, and gradually decreased from the preset load to the real-time load in a third preset time after a power grid power gap is met, wherein the first preset time is smaller than the third preset time, the load of the generator of the steam turbine is gradually decreased from the real-time load to the preset load in a fourth preset time when the rotating speed difference is negative, and gradually increased from the preset load to the real-time load in a sixth preset time after the power grid power gap is met, and the fourth preset time is smaller than the sixth preset time, so that the stability of a system when the load of the generator of the steam turbine is restored can be quickly responded to the power grid once.
Drawings
FIG. 1 is a schematic flow chart of a method for regulating generator load of a steam turbine according to an embodiment of the present application;
FIG. 2 is a schematic structural view of a device for adjusting generator load of a steam turbine according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
The technical solutions of the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which are obtained by a person skilled in the art based on the embodiments of the present application, fall within the scope of protection of the present application.
The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type, and are not limited to the number of objects, such as the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
The following describes in detail the adjustment scheme of the generator load of the steam turbine provided by the embodiment of the application through specific embodiments and application scenes thereof with reference to the accompanying drawings.
Fig. 1 is a schematic flow chart of a method for adjusting a generator load of a steam turbine according to an embodiment of the present application, which may be performed by an electronic device, in other words, by software or hardware installed in the electronic device, as shown in fig. 1, and includes the following steps.
S120, acquiring the real-time rotating speed of the steam turbine.
Under the condition that a frequency modulation instruction of a power grid is received, the real-time rotating speed of the steam turbine can be obtained through a control system, wherein the control system can be a control system in a digital electrohydraulic control system (DIGITAL ELECTRIC Hydraulic Control System, DEH) of the steam turbine or a total control system.
And S140, determining a rotating speed difference value between a preset rotating speed and a real-time rotating speed, and generating a load instruction corresponding to the rotating speed difference value, wherein the rotating speed difference value and the load instruction have a corresponding relation in a primary frequency modulation function.
The preset rotational speed here is a rotational speed of the steam turbine corresponding to the grid frequency.
For example, in the case of CCS side primary frequency modulation function f (x) = (-150, -10.1, -6, -2, 6, 10.1, 150, -39.6, -20,0,0, 20, 39.9, 39.9), if the rotational speed difference between the preset rotational speed and the real-time rotational speed is determined to be-150, the load instruction corresponding to the rotational speed difference is-39.6, if the rotational speed difference between the preset rotational speed and the real-time rotational speed is determined to be 2, the load instruction corresponding to the rotational speed difference is 0, if the rotational speed difference between the preset rotational speed and the real-time rotational speed is determined to be 150, the load instruction corresponding to the rotational speed difference is 39.9, and if the rotational speed difference between the preset rotational speed and the real-time rotational speed is determined to be-200, the load instruction corresponding to the rotational speed difference is-39.6.
For example, in the case of the DEH-side primary frequency modulation function f (x) = (-150, -10.1, -2, 10.1, 150; -39.6, -39.6,0,0, 39.6, 39.6), if the rotational speed difference between the preset rotational speed and the real-time rotational speed is determined to be-150, the load instruction corresponding to the rotational speed difference is-39.6, if the rotational speed difference between the preset rotational speed and the real-time rotational speed is determined to be 2, the load instruction corresponding to the rotational speed difference is 0, and if the rotational speed difference between the preset rotational speed and the real-time rotational speed is determined to be 150, the load instruction corresponding to the rotational speed difference is 39.6.
S160, adjusting the load of the generator of the steam turbine according to the load instruction.
Under the condition that the rotating speed difference value is positive, a load instruction is positive, the load of a generator of the turbine is indicated to gradually increase from a real-time load to a preset load in a first preset time, and gradually decrease from the preset load to the real-time load in a third preset time after the preset load continues for a second preset time, wherein the real-time load is the load of the generator of the turbine corresponding to the real-time rotating speed, the preset load is the load of the generator of the turbine corresponding to the preset rotating speed, and the first preset time is smaller than the third preset time; and under the condition that the rotating speed difference is negative, the load instruction is negative, the load of the generator of the steam turbine is indicated to gradually decrease from the real-time load to the preset load in a fourth preset time, and after the preset load continues for a fifth preset time, the load is gradually increased from the preset load to the real-time load in a sixth preset time, wherein the fourth preset time is smaller than the sixth preset time.
That is, under the condition that the rotation speed difference is positive, it is indicated that the real-time rotation speed of the steam turbine is lower than the preset rotation speed, the load of the generator of the steam turbine needs to be gradually increased from the real-time load to the preset load in the first preset time, so that the power grid demand is responded quickly, after the preset load continues for the second preset time (namely, the time of meeting the power grid power gap), the load is gradually reduced from the preset load to the real-time load in the third preset time, and the stability of the system is ensured while the load of the generator of the steam turbine is reduced. Under the condition that the rotating speed difference is negative, the real-time rotating speed of the steam turbine is higher than the preset rotating speed, the load of the generator of the steam turbine needs to be gradually reduced from the real-time load to the preset load in fourth preset time, so that the power grid demand is responded quickly, after the preset load continues for fifth preset time (namely, the time of meeting a power grid power gap), the load is gradually increased from the preset load to the real-time load in sixth preset time, and the stability of the system is ensured while the load of the generator of the steam turbine is increased.
It should be noted that, the first preset time and the fourth preset time are both a time value set for quickly responding to the power grid demand, and the third preset time and the sixth preset time are both a time value set for ensuring the stability of the system while returning the preset load to the real-time load.
The embodiment of the application provides a method for adjusting the load of a generator of a steam turbine, which comprises the steps of obtaining the real-time rotating speed of the steam turbine, determining the rotating speed difference between a preset rotating speed and the real-time rotating speed, generating a load instruction corresponding to the rotating speed difference, adjusting the load of the generator of the steam turbine according to the load instruction, wherein the load of the generator of the steam turbine is gradually increased from the real-time load to the preset load in a first preset time when the rotating speed difference is positive, and gradually decreased from the preset load to the real-time load in a third preset time after a power grid power gap is met, wherein the first preset time is smaller than the third preset time, the load of the generator of the steam turbine is gradually decreased from the real-time load to the preset load in a fourth preset time when the rotating speed difference is negative, and gradually increased from the preset load to the real-time load in a sixth preset time after the power grid power gap is met, and the fourth preset time is smaller than the sixth preset time, so that the stability of a system when the load of the generator of the steam turbine is restored can be quickly responded to the power grid once.
In an alternative implementation, adjusting the load of the generator of the steam turbine according to the load command may include: and controlling the boiler main control to adjust the load of the generator of the steam turbine according to the load instruction. The feedforward of the primary frequency modulation instruction is added in the main control of the boiler, and the control system can control the main control of the boiler to adjust the load of the generator of the steam turbine according to the load instruction under the condition that the load of the generator of the steam turbine is required to be adjusted.
In another alternative implementation, adjusting the load of the generator of the steam turbine according to the load command includes: adjusting a gain coefficient of the main control feedforward of the steam turbine according to the load instruction; and controlling the main control of the steam turbine to adjust the load of the generator of the steam turbine according to the adjusted feedforward gain coefficient. That is, when the load of the generator of the steam turbine needs to be adjusted, the control system can adjust the feedforward gain coefficient of the main control of the steam turbine according to the load instruction, and then control the main control of the steam turbine to adjust the load of the generator of the steam turbine according to the adjusted feedforward gain coefficient, so that the effect of the main control of the steam turbine in primary frequency modulation is increased, and the response speed to the primary frequency modulation of the power grid is accelerated. For example, the feedforward correspondence function of the turbine master may be f (x) = (0, 155, 175, 330, 450, 520, 610, 660, 700;0, 25, 27.5, 45.7, 61.5, 72, 80, 85.7, 90).
In one possible implementation, adjusting the load of the generator of the steam turbine according to the load command may include: according to the load instruction, controlling the main control of the boiler to adjust the load of the generator of the steam turbine; and adjusting the gain coefficient of the feedforward of the main control of the steam turbine according to the load instruction, and controlling the main control of the steam turbine to adjust the load of the generator of the steam turbine according to the adjusted gain coefficient of the feedforward. That is, when the load of the generator of the steam turbine needs to be adjusted, the feedforward of the primary frequency modulation instruction can be added in the main boiler control, the gain coefficient of the feedforward of the main boiler control is adjusted according to the load instruction, the main boiler control and the main boiler control act together through coordination control, and the main boiler control is controlled to adjust the load of the generator of the steam turbine according to the adjusted feedforward gain coefficient and the main boiler control according to the load instruction. Alternatively, the steam turbine master control and the boiler master control can act simultaneously through coordinated control.
In an embodiment of the present application, after determining the rotation speed difference between the preset rotation speed and the real-time rotation speed, the method may further include: and adjusting the rotating speed difference value according to the corresponding relation. By adjusting the rotating speed difference value according to the corresponding relation, the interference can be effectively removed, and the obtained instruction curve is smoother.
In the embodiment of the application, before the real-time rotating speed of the steam turbine is obtained, the method can further comprise the following steps: under the condition that a preset condition is met, the primary frequency modulation function is put into operation, wherein the preset condition comprises: coordinating in the CCS mode, determining that the slip signal is free of quality faults, and that the load of the generator of the steam turbine is greater than a first threshold. The primary frequency modulation function is put into operation under the conditions that the coordination is in a CCS mode, the slip signal is determined to have no quality fault and the load of a generator of the steam turbine is larger than a first threshold, wherein the slip signal is determined to have no quality fault, namely no disconnection, no dead point and the like, and the first threshold is a value for guaranteeing the operation safety of a power plant unit. And under the condition that the condition of coordinating in the CCS mode, determining that the slip signal has no quality fault and the load of the generator of the steam turbine is larger than a first threshold value can not be met at the same time, automatically cutting off the primary frequency modulation function. Alternatively, the first threshold may be 190MW.
In an alternative, according to the load command, the load of the generator of the steam turbine is adjusted, including: and adjusting the pressure output by the main control of the steam turbine according to the load instruction. That is, when the load of the generator of the steam turbine needs to be adjusted, the opening of the valve of the main control of the steam turbine can be controlled to be unchanged, and the pressure output by the main control of the steam turbine is adjusted according to the load instruction, so that the load of the generator of the steam turbine is adjusted, and the primary frequency modulation of the power grid is responded. For example, the slip pressure curve may be f (x) = (0, 200, 250, 300, 330, 400, 500, 620, 660, 750;8.92, 13.3, 14.5, 15.8, 16.7, 18.9, 21.8, 24.2, 24.2), with a load command of 200, the pressure of the turbine main output is 13.3, and with a load command of 330, the pressure of the turbine main output is 16.7. The pressure output by the main control of the steam turbine is regulated according to the load instruction, so that the steam parameters and the acting capacity of the unit can be effectively improved, and the dry running state of the deep load regulation interval of the unit can be effectively ensured; the heat accumulation of the unit is effectively improved, and the variable load rate and primary frequency modulation capacity of the unit are improved.
According to the method for adjusting the generator load of the steam turbine, provided by the embodiment of the application, the execution main body can be the device for adjusting the generator load of the steam turbine. In the embodiment of the application, the method for adjusting the generator load of the steam turbine is taken as an example, and the device for adjusting the generator load of the steam turbine provided by the embodiment of the application is described.
Fig. 2 is a schematic structural diagram of a device for adjusting a generator load of a steam turbine according to an embodiment of the present application. As shown in fig. 2, the turbine generator load adjustment device 200 includes: an acquisition module 210, a generation module 220, and an adjustment module 230.
In the present application, the acquiring module 210 is configured to acquire a real-time rotation speed of the steam turbine; the generating module 220 is configured to determine a rotation speed difference between a preset rotation speed and the real-time rotation speed, and generate a load instruction corresponding to the rotation speed difference, where the rotation speed difference and the load instruction have a corresponding relationship in a primary frequency modulation function; an adjustment module 230, configured to adjust a load of a generator of the steam turbine according to the load command; the load instruction is positive and indicates that the load of the generator of the steam turbine gradually increases from a real-time load to a preset load in a first preset time when the rotating speed difference is positive, and gradually decreases from the preset load to the real-time load in a third preset time after the preset load continues for a second preset time, wherein the real-time load is the load of the generator of the steam turbine corresponding to the real-time rotating speed, the preset load is the load of the generator of the steam turbine corresponding to the preset rotating speed, and the first preset time is less than the third preset time; and under the condition that the rotating speed difference value is negative, the load instruction is negative, the load of the generator of the steam turbine is indicated to gradually decrease from the real-time load to a preset load in a fourth preset time, and after the preset load continues for a fifth preset time, the load is gradually increased from the preset load to the real-time load in a sixth preset time, wherein the fourth preset time is smaller than the sixth preset time.
In one implementation, the adjusting module 230 adjusts the load of the generator of the steam turbine according to the load command, including: and controlling a boiler main control to adjust the load of the generator of the steam turbine according to the load instruction.
In one implementation, the adjusting module 230 adjusts the load of the generator of the steam turbine according to the load command, including: and controlling a boiler main control to adjust the load of the generator of the steam turbine according to the load instruction.
In one implementation, the adjusting module 230 adjusts the load of the generator of the steam turbine according to the load command, including: adjusting a gain coefficient of the main control feedforward of the steam turbine according to the load instruction; and controlling the main control of the steam turbine to adjust the load of the generator of the steam turbine according to the adjusted feedforward gain coefficient.
In one implementation, the adjusting module 230 adjusts the load of the generator of the steam turbine according to the load command, including: according to the load instruction, controlling a boiler main control to adjust the load of a generator of the steam turbine; and adjusting the gain coefficient of the feedforward of the main control of the steam turbine according to the load instruction, and controlling the main control of the steam turbine to adjust the load of the generator of the steam turbine according to the adjusted gain coefficient of the feedforward.
In one implementation, the adjusting module 230 is further configured to: and after the rotation speed difference value between the preset rotation speed and the real-time rotation speed is determined, adjusting the rotation speed difference value according to the corresponding relation.
In one implementation manner, the system further comprises a commissioning module, configured to commission the primary frequency modulation function under a condition that a preset condition is satisfied before the real-time rotation speed of the steam turbine is obtained, where the preset condition includes: coordinating in CCS mode, determining that the slip signal is free of quality faults, and that a load of a generator of the steam turbine is greater than a first threshold.
In one implementation, the adjusting module 230 adjusts the load of the generator of the steam turbine according to the load command, including: and adjusting the pressure output by the main control of the steam turbine according to the load instruction.
The adjusting device of the generator load of the steam turbine in the embodiment of the application can be electronic equipment or a component in the electronic equipment, such as an integrated circuit or a chip. The electronic device may be a terminal, or may be other devices than a terminal.
The device for adjusting the generator load of the steam turbine in the embodiment of the application can be a device with an operating system.
The device for adjusting the generator load of the steam turbine provided by the embodiment of the application can realize each process realized by the embodiment of the method for adjusting the generator load of the steam turbine, and is not repeated here.
Optionally, as shown in fig. 3, the embodiment of the present application further provides an electronic device 300, including a processor 301 and a memory 302, where the memory 302 stores a program or an instruction that can be executed on the processor 301, and the program or the instruction when executed by the processor 301 implements each step of the embodiment of the method for adjusting the generator load of the steam turbine, and the steps can achieve the same technical effect, so that repetition is avoided and no further description is given here.
It should be noted that, the electronic device in the embodiment of the present application includes a mobile electronic device and a non-mobile electronic device.
The embodiment of the application also provides a readable storage medium, and the readable storage medium stores a program or an instruction, and when the program or the instruction is executed by a processor, the program or the instruction realizes each process of the embodiment of the method for adjusting the load of the generator of the steam turbine, and the same technical effect can be achieved, so that repetition is avoided, and no description is repeated here.
Wherein the processor is a processor in the electronic device described in the above embodiment. The readable storage medium includes computer readable storage medium such as computer readable memory ROM, random access memory RAM, magnetic or optical disk, etc.
The embodiment of the application further provides a chip, the chip comprises a processor and a communication interface, the communication interface is coupled with the processor, the processor is used for running programs or instructions, the processes of the embodiment of the method for adjusting the load of the generator of the steam turbine can be realized, the same technical effects can be achieved, and the repetition is avoided, and the description is omitted here.
It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, chip systems, or system-on-chip chips, etc.
Embodiments of the present application provide a computer program product stored in a storage medium, where the program product is executed by at least one processor to implement the respective processes of the generator load adjustment method embodiment of the steam turbine, and achieve the same technical effects, and are not repeated herein.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in part in the form of a computer software product stored on a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal to perform the method according to the embodiments of the present application.
The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are to be protected by the present application.
Claims (9)
1. A method of adjusting generator load of a steam turbine, comprising:
acquiring the real-time rotating speed of the steam turbine;
determining a rotating speed difference value between a preset rotating speed and the real-time rotating speed, and generating a load instruction corresponding to the rotating speed difference value, wherein the rotating speed difference value and the load instruction have a corresponding relation in a primary frequency modulation function;
According to the load instruction, the load of the generator of the steam turbine is adjusted;
The load instruction is positive and indicates that the load of the generator of the steam turbine gradually increases from a real-time load to a preset load in a first preset time when the rotating speed difference is positive, and gradually decreases from the preset load to the real-time load in a third preset time after the preset load continues for a second preset time, wherein the real-time load is the load of the generator of the steam turbine corresponding to the real-time rotating speed, the preset load is the load of the generator of the steam turbine corresponding to the preset rotating speed, and the first preset time is less than the third preset time;
When the rotation speed difference is negative, the load instruction is negative, the load of the generator of the steam turbine is indicated to gradually decrease from the real-time load to a preset load in a fourth preset time, and gradually increase from the preset load to the real-time load in a sixth preset time after the preset load continues for a fifth preset time, wherein the fourth preset time is smaller than the sixth preset time;
The load of the generator of the steam turbine is adjusted according to the load instruction, and the load adjustment method comprises the following steps:
according to the load instruction, controlling a boiler main control to adjust the load of a generator of the steam turbine;
and adjusting the gain coefficient of the feedforward of the main control of the steam turbine according to the load instruction, and controlling the main control of the steam turbine to adjust the load of the generator of the steam turbine according to the adjusted gain coefficient of the feedforward.
2. The method of adjusting according to claim 1, wherein adjusting the load of the generator of the steam turbine according to the load command comprises:
and controlling a boiler main control to adjust the load of the generator of the steam turbine according to the load instruction.
3. The method of adjusting according to claim 1, wherein adjusting the load of the generator of the steam turbine according to the load command comprises:
adjusting a gain coefficient of the main control feedforward of the steam turbine according to the load instruction;
and controlling the main control of the steam turbine to adjust the load of the generator of the steam turbine according to the adjusted feedforward gain coefficient.
4. The adjustment method according to claim 1, characterized by further comprising, after said determining a rotational speed difference between a preset rotational speed and said real-time rotational speed:
And adjusting the rotating speed difference value according to the corresponding relation.
5. The method of adjusting according to claim 1, further comprising, prior to said acquiring the real-time rotational speed of the steam turbine:
Under the condition that preset conditions are met, the primary frequency modulation function is put into operation, wherein the preset conditions comprise: coordinating in CCS mode, determining that the slip signal is free of quality faults, and that a load of a generator of the steam turbine is greater than a first threshold.
6. The method of adjusting according to claim 1, wherein adjusting the load of the generator of the steam turbine according to the load command comprises:
And adjusting the pressure output by the main control of the steam turbine according to the load instruction.
7. An apparatus for adjusting a generator load of a steam turbine, comprising:
the acquisition module is used for acquiring the real-time rotating speed of the steam turbine;
The generating module is used for determining a rotating speed difference value between a preset rotating speed and the real-time rotating speed and generating a load instruction corresponding to the rotating speed difference value, wherein the rotating speed difference value and the load instruction have a corresponding relation in a primary frequency modulation function;
the adjusting module is used for adjusting the load of the generator of the steam turbine according to the load instruction;
The load instruction is positive and indicates that the load of the generator of the steam turbine gradually increases from a real-time load to a preset load in a first preset time when the rotating speed difference is positive, and gradually decreases from the preset load to the real-time load in a third preset time after the preset load continues for a second preset time, wherein the real-time load is the load of the generator of the steam turbine corresponding to the real-time rotating speed, the preset load is the load of the generator of the steam turbine corresponding to the preset rotating speed, and the first preset time is less than the third preset time;
When the rotation speed difference is negative, the load instruction is negative, the load of the generator of the steam turbine is indicated to gradually decrease from the real-time load to a preset load in a fourth preset time, and gradually increase from the preset load to the real-time load in a sixth preset time after the preset load continues for a fifth preset time, wherein the fourth preset time is smaller than the sixth preset time;
The adjusting module adjusts the load of the generator of the steam turbine according to the load instruction, and comprises the following steps:
according to the load instruction, controlling a boiler main control to adjust the load of a generator of the steam turbine;
and adjusting the gain coefficient of the feedforward of the main control of the steam turbine according to the load instruction, and controlling the main control of the steam turbine to adjust the load of the generator of the steam turbine according to the adjusted gain coefficient of the feedforward.
8. The adjustment device of claim 7, wherein the adjustment module adjusts a load of a generator of the steam turbine according to the load command, comprising:
and controlling a boiler main control to adjust the load of the generator of the steam turbine according to the load instruction.
9. The adjustment device of claim 7, wherein the adjustment module adjusts a load of a generator of the steam turbine according to the load command, comprising:
adjusting a gain coefficient of the main control feedforward of the steam turbine according to the load instruction;
and controlling the main control of the steam turbine to adjust the load of the generator of the steam turbine according to the adjusted feedforward gain coefficient.
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