CN110778368A - Frequency modulation method and device for steam turbine generator unit - Google Patents
Frequency modulation method and device for steam turbine generator unit Download PDFInfo
- Publication number
- CN110778368A CN110778368A CN201911094234.6A CN201911094234A CN110778368A CN 110778368 A CN110778368 A CN 110778368A CN 201911094234 A CN201911094234 A CN 201911094234A CN 110778368 A CN110778368 A CN 110778368A
- Authority
- CN
- China
- Prior art keywords
- valve
- frequency modulation
- heater
- cylinder
- steam turbine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
Abstract
The application discloses a frequency modulation method and device for a steam turbine generator unit, and relates to the technical field of thermal power generation. Analyzing the received frequency modulation instruction and acquiring a frequency modulation amplitude and a frequency carried in the frequency modulation instruction; searching the valve ID and the opening corresponding to each valve ID according to the frequency modulation amplitude and frequency and a preset mapping relation table; and finally, controlling the current opening and closing state of a valve which is arranged between a cylinder of the steam turbine generator unit and the heater and is associated with the valve ID to be switched to a corresponding opening degree, so that the steam extraction amount of the cylinder to the heater can be changed, understandably, the power generation power of the steam turbine generator unit is small when the steam extraction amount is large, and the power generation power of the steam turbine generator unit is large when the steam extraction amount is small, so that the power generation power of the steam turbine generator unit is changed by changing the steam extraction amount of the cylinder to the heater, the frequency modulation of a power grid is completed, and the response speed is high, the manufacturing cost is low.
Description
Technical Field
The application relates to the technical field of thermal power generation, in particular to a frequency modulation method and device for a steam turbine generator unit.
Background
With the rapid development of new energy (mainly wind power and photovoltaic) and the access to a power grid, a thermal power plant not only needs to complete a normal frequency modulation task, but also needs to bear the rapid frequency modulation requirement brought by the access of the new energy to the power grid. The frequency modulation response time (obvious change of the power of the thermal power generating unit after the automatic power generation control instruction is sent to the thermal power generating unit) is 60-90 s, so that the requirement of rapid frequency modulation of a power grid cannot be met, the frequency deviation of the power grid is large, the safety of the power grid is influenced, and meanwhile, the benefit of a power plant is low.
In the prior art, in order to meet the requirement of a power grid, part of power plants implement an electric frequency modulation technology, the electric frequency modulation technology is based on energy storage of a lithium battery or a flywheel to carry out energy bidirectional transmission to realize rapid frequency modulation of the power grid, although the electric frequency modulation technology has high response speed, the manufacturing cost is high, large cost needs to be invested, and the application range is narrow.
Disclosure of Invention
In a first aspect, an embodiment of the present application provides a frequency modulation method for a steam turbine generator unit, including:
receiving a frequency modulation instruction transmitted by instruction transmission equipment;
analyzing the frequency modulation instruction and acquiring a frequency modulation amplitude and a frequency carried in the frequency modulation instruction;
searching out the valve IDs and the corresponding opening degrees of each valve ID according to the frequency modulation amplitude and frequency and a preset mapping relation table;
and controlling the current opening and closing state of a valve which is arranged between a cylinder of the steam turbine generator unit and the heater and is associated with the valve ID to be switched to a corresponding opening degree.
Further, a first valve and a second valve connected with the first valve in parallel are arranged between a cylinder of the steam turbine generator unit and the heater, wherein the first valve and the second valve are both switch valves, the steam quantity of the heater is extracted by the cylinder when the second valve is opened and the first valve is closed, the steam quantity of the heater is 10% -20% of the steam quantity of the heater extracted by the cylinder when the first valve is opened and the second valve is closed, the frequency modulation instruction is a primary frequency modulation instruction, and the method further comprises the following steps:
the first valve is controlled to be closed and the second valve is controlled to be opened.
Further, the method further comprises:
and if a protection instruction transmitted by a digital electro-hydraulic control system of the steam turbine generator unit is received, closing the control valve.
Further, the first valve is an on-off valve.
Further, the instruction transmission device is a remote terminal unit of the steam turbine generator unit or a steam turbine digital electro-hydraulic control system of the steam turbine generator unit, and the frequency modulation instruction is an automatic power generation control instruction transmitted by the remote terminal unit or a primary frequency modulation instruction transmitted by the steam turbine digital electro-hydraulic control system.
Further, the cylinder includes high pressure cylinder, intermediate pressure cylinder and low pressure cylinder, and the heater includes the first high pressure feed water heater who links to each other with high pressure cylinder, the second high pressure feed water heater who links to each other with intermediate pressure cylinder, correspond the low pressure feed water heater who links to each other with the low pressure cylinder, wherein, between first high pressure feed water heater and the high pressure cylinder, between second high pressure feed water heater and the intermediate pressure cylinder, all be provided with first valve between low pressure feed water cylinder and the low pressure feed water heater, the current state of opening and shutting of the valve that the control set up between steam turbine generator unit's cylinder and heater and that the valve ID is correlated with switches into corresponding aperture and:
controlling the current opening and closing state of a first valve between a first high-pressure heater and a high-pressure cylinder, between a second high-pressure heater and a middle-pressure cylinder and between a low-pressure cylinder and a low-pressure heater to be switched to corresponding opening degrees;
or only controlling the current opening and closing state of the first valve between the low-pressure cylinder and the low-pressure heater to be switched to the corresponding opening degree.
In a second aspect, an embodiment of the present application further provides a frequency modulation device for a steam turbine generator unit, including:
an instruction receiving unit configured to receive a frequency modulation instruction transmitted by an instruction transmitting device;
the instruction analysis unit is configured to analyze the frequency modulation instruction and acquire a frequency modulation amplitude and a frequency carried in the frequency modulation instruction;
the information searching unit is configured to search the valve IDs and the corresponding opening degrees of the valve IDs according to the frequency modulation amplitude and frequency and a preset mapping relation table;
and a valve control unit configured to control a current opening and closing state of a valve associated with the valve ID, which is provided between the cylinder of the turbo generator set and the heater, to be switched to a corresponding opening degree.
Further, a first valve and a second valve connected with the first valve in parallel are arranged between the cylinder of the steam turbine generator unit and the heater, wherein the first valve is a regulating valve, the second valve is a switch valve, the steam quantity of the heater extracted by the cylinder when the second valve is opened and the first valve is closed is 10% -20% of the steam quantity of the heater extracted by the cylinder when the first valve is opened and the second valve is closed, the frequency modulation instruction is a secondary frequency modulation instruction, and the valve control unit is further configured to control the first valve to be closed and the second valve to be opened.
Further, the valve control unit is also configured to control the valve to be closed if a protection command transmitted by a digital electro-hydraulic control system of the steam turbine generator unit is received.
Further, the first valve is a regulating valve.
The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects: analyzing the received frequency modulation instruction and acquiring a frequency modulation amplitude and a frequency carried in the frequency modulation instruction; searching valve IDs and the corresponding opening degrees of each valve ID according to the frequency modulation amplitude and frequency and a preset mapping relation table; and finally, controlling the current opening and closing state of a valve which is arranged between a cylinder of the steam turbine generator unit and the heater and is related to the valve ID to be switched to a corresponding opening degree, so that the steam extraction amount from the cylinder to the heater can be changed.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a flowchart of a method for frequency modulation of a steam turbine generator unit according to an embodiment of the present application;
fig. 2 is a block diagram of a frequency modulation system of a steam turbine generator unit according to an embodiment of the present disclosure;
fig. 3 is a block diagram of a frequency modulation system of a steam turbine generator unit according to an embodiment of the present disclosure;
fig. 4 is a flowchart of a frequency modulation method for a steam turbine generator unit according to an embodiment of the present application;
fig. 5 is a flowchart of a frequency modulation method for a steam turbine generator unit according to an embodiment of the present application;
fig. 6 is a block diagram of a frequency modulation system of a steam turbine generator unit according to an embodiment of the present application;
fig. 7 is a functional unit block diagram of a frequency modulation system of a steam turbine generator unit according to an embodiment of the present application;
fig. 8 is a circuit connection block diagram of an electronic device according to an implementation manner of an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clear, the technical solutions of the present application will be clearly and completely described below with reference to the specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of the present application provides a method for tuning a turbo generator unit, which is applied to a Controller 101, for example, the Controller 101 may be a Programmable Logic Controller (PLC). As shown in fig. 2, the controller 101 is applied to a turbo unit fm system including a command transmission device 102, a cylinder 105, a heater 104, and a first valve 103. The controller 101 is connected to a command transmission device 102 and a first valve 103, respectively, and the first valve 103 is disposed between the cylinder 105 and the heater 104 to control the flow rate of the water vapor transmitted between the cylinder 105 and the heater 104. The method comprises the following steps:
s11: receives the frequency modulation command transmitted by the command transmission device 102.
Alternatively, the frequency modulation command may be, but is not limited to, an automatic power generation control command transmitted by a remote terminal unit of the steam turbine generator unit or a primary frequency modulation command transmitted by a digital electro-hydraulic control system of a steam turbine of the steam turbine generator unit, wherein the automatic power generation control command is transmitted to the remote terminal unit through a power grid.
S12: and analyzing the frequency modulation instruction and acquiring the frequency modulation amplitude and frequency carried in the frequency modulation instruction.
S13: and searching the valve ID and the opening corresponding to each valve ID according to the frequency modulation amplitude and frequency and a preset mapping relation table.
The preset mapping relation table contains different frequency modulation amplitude values and different frequency modulation frequency values respectively corresponding to the valve IDs and the opening degrees of the valve IDs. For example, the valve IDs corresponding to the amplitude and frequency a of the frequency modulation are valve a and valve B, the corresponding valve openings are valve a opening a1 and valve B opening a2, and for example, the valve IDs corresponding to the amplitude and frequency B of the frequency modulation are valve a and valve C, and the corresponding valve openings are valve a opening A3 and valve C opening a 4.
S14: the current opening/closing state of the valve 103 associated with the valve ID provided between the cylinder 105 of the turbo unit and the heater 104 is controlled to be switched to the corresponding opening degree.
In addition, in the process of performing frequency modulation, after the amplitude of the automatic power generation control command and the unit load signal is determined, when the amplitude of the frequency modulation command exceeds 0.3-1% of the unit load (disturbance of small fluctuation is reduced), a deviation logic "1" is output, the deviation logic output and the primary frequency modulation signal perform an or logic operation together, when the primary frequency modulation signal (load increasing action) or the deviation logic is "1" (action command), the or logic output is "1", the or logic output and the fast frequency modulation signal are input into an and logic again, only when the two signals are logic "1", the logic determination output is "1", a pulse signal can be generated according to the amplitude difference, and then the current opening and closing state of the first valve 103 is driven by pulses to be switched to a corresponding opening degree for frequency modulation. In addition, a check valve is further arranged between the cylinder 105 and the heater 104, the frequency modulation system of the steam turbine generator unit further has a water inlet prevention function, and the mode for realizing the water inlet prevention function can be that the check valve and the first valve 103 are controlled to be closed.
The frequency modulation method of the steam turbine generator unit analyzes the received frequency modulation instruction and obtains the frequency modulation amplitude and frequency carried in the frequency modulation instruction; searching valve IDs and the corresponding opening degrees of each valve ID according to the frequency modulation amplitude and frequency and a preset mapping relation table; finally, the current opening and closing state of the valve 103 associated with the valve ID, which is provided between the cylinder 105 of the turbo generator set and the heater 104, is controlled to be switched to the corresponding opening degree, so that the amount of steam extracted from the cylinder 105 to the heater 104 can be changed. It can be understood that when the extraction steam volume is large, the power generation power of the steam turbine generator unit is small, and when the extraction steam volume is small, the power generation power of the steam turbine generator unit is large, so that the power generation power of the steam turbine generator unit is changed by changing the extraction steam volume from the cylinder 105 to the heater 104, the power grid frequency modulation is completed, and the response speed is high, the manufacturing cost is low, and the application range is wide.
Through the experiment of the inventor, the frequency modulation response time of the frequency modulation method of the steam turbine generator unit is less than 20s (far superior to 60 s-90 s of the conventional thermal power unit), the structural modification of the conventional system is small, the cost is low, and higher benefit can be brought to the thermal power plant.
As one embodiment, as shown in fig. 3, a second valve 106 connected in parallel with the first valve 103 is disposed between the cylinder 105 and the heater 104 of the steam turbine generator unit, wherein both the first valve 103 and the second valve 106 are open/close valves. When the second valve 106 is opened and the first valve 103 is closed, the steam quantity of the heater 104 extracted by the cylinder 105 is 10% -20% of the steam quantity of the heater 104 extracted by the cylinder 105 when the first valve 103 is opened and the second valve 106 is closed, and the first valve 103 is closed and the second valve 106 is opened.
As shown in fig. 4, S14 may be: the first valve 103 is controlled to close and the second valve 106 is controlled to open.
When the first valve 103 and the second valve 106 are both on-off valves, the first valve 103 and the second valve 106 only include two states, i.e., an open state and a closed state. In order to reduce the influence on the water level and material strain of the heater 104 when the cylinder 105 extracts steam, the steam extraction amount of the cylinder 105 to the heater 104 cannot be completely interrupted, and 10 to 20 percent of the original steam extraction amount must be reserved; since the first valve 103 is an on-off valve and cannot operate at a low flow rate (the valve element is easily damaged to cause valve leakage), a second valve 106 is provided in parallel with the first valve 103. When the first valve 103 needs to be closed when receiving a frequency modulation instruction, the second valve 106 is controlled to be opened so as to keep the steam extraction amount of the cylinder 105 in the heater 104 to be 10% -20% of the original steam extraction amount.
Further, as shown in fig. 5, the method further includes:
s41: and determining whether a protection command transmitted by a digital electro-hydraulic control system of the steam turbine generator unit is received, and if so, executing S42.
When the turbine of the steam turbine generator unit trips, the turbine exceeds the speed limit, the generator trips and the heater 104 exceeds the high water level, the digital electro-hydraulic control system of the turbine generates a protection instruction and transmits the protection instruction to the controller 101.
S42: the control valve is closed.
It is understood that one of the first valve 103 and the second valve 106 is necessarily opened, and the other is closed, so that the first valve 103 or the second valve 106 is controlled to be closed according to the actual opening and closing states of the first valve 103 and the second valve 106. By controlling the first valve 103 or the second valve 106 to be closed, the failure of the steam turbine generator unit during operation is avoided.
Optionally, as another embodiment, the first valve 103 is a regulating valve. The regulating valve can regulate the opening degree, for example, the regulating valve can be fully opened, half opened, one third opened, fully closed and the like. By controlling the opening of the regulating valve, the frequency modulation of the power grid can be more accurately carried out, the opening of the regulating valve can be directly controlled to keep 10% -20% of the original steam extraction amount, the influence of the cylinder 105 on the water level and material strain of the heater 104 during steam extraction is reduced, and the second valve 106 does not need to be additionally arranged.
Specifically, as shown in fig. 6, the cylinder 105 includes a high pressure cylinder 107, an intermediate pressure cylinder 108, and low pressure cylinders 109 (two in fig. 6), the heater 104 includes a first high temperature heater 110 connected to the high pressure cylinder 107, a second high temperature heater 111 connected to the intermediate pressure cylinder 108, and low temperature heaters 112 connected to the low pressure cylinders 109 in a one-to-one correspondence manner, wherein first valves 103 are disposed between the first high temperature heater 110 and the high pressure cylinder 107, between the second high temperature heater 111 and the intermediate pressure cylinder 108, and between the low pressure cylinders 109 and the low temperature heaters 112, and S13 includes:
controlling the current opening and closing state of the first valve 103 between the first high-temperature heater 110 and the high-pressure cylinder 107, between the second high-temperature heater 111 and the medium-pressure cylinder 108, and between the low-pressure cylinder 109 and the low-temperature heater 112 to be switched to the corresponding opening degree;
or only controlling the current opening and closing state of the first valve 103 between the low-temperature heater 112 and the low-pressure cylinder 109 to switch to the corresponding opening degree, so that the stability of the steam turbine generator unit can be ensured.
Referring to fig. 7, an embodiment of the present application further provides a frequency modulation device 700 for a steam turbine generator unit, which is applied to a Controller 101, for example, the Controller 101 may be a Programmable Logic Controller (PLC). As shown in fig. 2, the controller 101 is applied to a steam turbine generator system, and the steam turbine generator system includes a command transmission device 102, a cylinder 105, a heater 104, and a first valve 103. The controller 101 is respectively connected to the command transmission device 102 and the first valve 103 in communication, and the first valve 103 is disposed between the cylinder 105 and the heater 104 for controlling the flow of the water vapor transmitted between the cylinder 105 and the heater 104. It should be noted that, the basic principle and the generated technical effect of the frequency modulation device 700 of the steam turbine generator set provided in the embodiment of the present application are the same as those of the above embodiment, and for the sake of brief description, reference may be made to corresponding contents in the above embodiment for parts that are not mentioned in the embodiment of the present application. The apparatus 700 comprises an instruction receiving unit 701, an instruction parsing unit 702, an information searching unit 703 and a valve control unit 704, wherein,
the instruction receiving unit 701 is configured to receive the frequency modulation instruction transmitted by the instruction transmitting device 102.
The instruction parsing unit 702 is configured to parse the fm instruction and obtain a fm amplitude and a frequency carried in the fm instruction.
The information searching unit 703 is configured to find out the valve IDs and the corresponding opening degrees of each valve ID according to the frequency modulation amplitude and frequency and a preset mapping relation table.
A valve control unit 704 configured to control the current open-close state of the valve 103 associated with the valve ID provided between the cylinder 105 of the turbo generator set and the heater 104 to be switched to a corresponding opening degree.
The frequency modulation device 700 of the steam turbine generator unit can realize the following functions: analyzing the received frequency modulation instruction and acquiring a frequency modulation amplitude and a frequency carried in the frequency modulation instruction; searching the valve ID and the opening corresponding to each valve ID according to the frequency modulation amplitude and frequency and a preset mapping relation table; and finally, controlling the current opening and closing state of the valve 103 which is arranged between the cylinder 105 and the heater 104 of the turbine generator set and is associated with the valve ID to be switched to a corresponding opening degree, so that the steam extraction amount from the cylinder 105 to the heater 104 can be changed, understandably, the power generation power of the turbine generator set is low when the steam extraction amount is large, and the power generation power of the turbine generator set is high when the steam extraction amount is small, so that the power generation power of the turbine generator set is changed by changing the steam extraction amount from the cylinder 105 to the heater 104, the grid frequency modulation is completed, and the turbine generator set has the advantages of high response speed, low manufacturing cost and wide application range.
Optionally, as an embodiment, a second valve 106 connected in parallel with the first valve 103 is disposed between the cylinder 105 and the heater 104 of the steam turbine generator unit, wherein the first valve 103 regulating valve and the second valve 106 are on-off valves, the cylinder 105 extracts the steam amount of the heater 104 when the second valve 106 is opened and the first valve 103 is closed, the cylinder 105 extracts 10% to 20% of the steam amount of the heater 104 when the first valve 103 is opened and the second valve 106 is closed, and the frequency modulation command is a secondary frequency modulation command.
The valve control unit 704 is further configured to control the first valve 103 to close and the second valve 106 to open.
Optionally, the valve control unit 704 is further configured to control the valve to close if a protection command transmitted by a digital electro-hydraulic control system of a steam turbine of the steam turbine generator unit is received.
Alternatively, as another embodiment, the first valve 103 may be a regulator valve.
It should be noted that the execution subjects of the steps of the method provided in embodiment 1 may be the same device, or different devices may be used as the execution subjects of the method. For example, the execution subject of steps 11 and 12 may be device 1, and the execution subject of step 13 may be device 2; for another example, the execution subject of step 11 may be device 1, and the execution subjects of step 12 and step 13 may be device 2; and so on.
The foregoing description has been directed to specific embodiments of this disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
Fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present application. Referring to fig. 8, at a hardware level, the electronic device includes a controller 101, and optionally further includes an internal bus, a network interface, and a memory. The Memory may include a Memory, such as a Random-Access Memory (RAM), and may further include a non-volatile Memory, such as at least 1 disk Memory. Of course, the electronic device may also include hardware needed for other services.
The controller 101, the network interface, and the memory may be connected to each other via an internal bus, which may be an ISA (Industry Standard Architecture) bus, a PCI (peripheral component Interconnect) bus, an EISA (Extended industrial Standard Architecture) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one double-headed arrow is shown in FIG. 8, but that does not indicate only one bus or one type of bus.
And the memory is used for storing programs. In particular, the program may include program code comprising computer operating instructions. The memory may include both memory and non-volatile storage and provides instructions and data to the controller 101.
The controller 101 reads a corresponding computer program from the nonvolatile memory into the memory and then runs the computer program to form a frequency modulation device of the steam turbine generator unit on a logic level. The controller 101 executes the program stored in the memory, and is specifically configured to perform the following operations:
receiving a frequency modulation instruction transmitted by the instruction transmission equipment 102;
analyzing the frequency modulation instruction and acquiring a frequency modulation amplitude and a frequency carried in the frequency modulation instruction;
searching out the valve IDs and the corresponding opening degrees of each valve ID according to the frequency modulation amplitude and frequency and a preset mapping relation table;
the current opening/closing state of the valve 103 associated with the valve ID provided between the cylinder 105 of the turbo unit and the heater 104 is controlled to be switched to the corresponding opening degree.
The method executed by the frequency modulation device of the steam turbine generator unit disclosed in the embodiment of fig. 1 of the present application may be applied to the controller 101, or implemented by the controller 101. The controller 101 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the controller 101. The controller 101 may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but also Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules may be located in ram, flash, rom, prom, or eprom, registers, among other storage media that are well known in the art. The storage medium is located in a memory, and the controller 101 reads information in the memory and completes the steps of the method in combination with hardware thereof.
The electronic device may also execute the method shown in fig. 1, and implement the functions of the frequency modulation apparatus of the turbo generator set in the embodiment shown in fig. 1, which are not described herein again in this embodiment of the application.
Of course, besides the software implementation, the electronic device of the present application does not exclude other implementations, such as a logic device or a combination of software and hardware, and the like, that is, the execution subject of the following processing flow is not limited to each logic unit, and may also be hardware or a logic device.
Embodiments of the present application also provide a computer-readable storage medium storing one or more programs, where the one or more programs include instructions, which when executed by a portable electronic device including a plurality of application programs, enable the portable electronic device to perform the method of the embodiment shown in fig. 1, and are specifically configured to:
receiving a frequency modulation instruction transmitted by the instruction transmission equipment 102;
analyzing the frequency modulation instruction and acquiring a frequency modulation amplitude and a frequency carried in the frequency modulation instruction;
searching out the valve IDs and the corresponding opening degrees of each valve ID according to the frequency modulation amplitude and frequency and a preset mapping relation table;
the current opening/closing state of the valve 103 associated with the valve ID provided between the cylinder 105 of the turbo unit and the heater 104 is controlled to be switched to the corresponding opening degree.
In short, the above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
The systems, devices, modules or units illustrated in the above embodiments may be implemented by a computer chip or an entity, or by a product with certain functions. One typical implementation device is a computer. In particular, the computer may be, for example, a personal computer, a laptop computer, a cellular telephone, a camera phone, a smartphone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement the information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It should also be noted that 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 an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present description are described in a progressive manner, and similar parts between the embodiments are referred to each other, and each embodiment focuses on different points from other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
Claims (10)
1. A frequency modulation method for a steam turbine generator unit is characterized by comprising the following steps:
receiving a frequency modulation instruction transmitted by instruction transmission equipment;
analyzing the frequency modulation instruction and acquiring a frequency modulation amplitude and a frequency carried in the frequency modulation instruction;
searching valve IDs and the corresponding opening degree of each valve ID according to the frequency modulation amplitude and frequency and a preset mapping relation table;
and controlling the current opening and closing state of a valve which is arranged between a cylinder of the steam turbine generator unit and the heater and is associated with the valve ID to be switched to a corresponding opening degree.
2. The method according to claim 1, wherein a first valve and a second valve connected in parallel with the first valve are arranged between a cylinder of the steam turbine generator unit and a heater, wherein the first valve and the second valve are both on-off valves, the steam quantity of the heater extracted by the cylinder when the second valve is opened and the first valve is closed is 10% -20% of the steam quantity of the heater extracted by the cylinder when the first valve is opened and the second valve is closed, the frequency modulation command is a secondary frequency modulation command,
the controlling of the switching of the current opening and closing state of the valve arranged between the cylinder of the turbo generator unit and the heater and associated with the valve ID to the corresponding opening degree comprises:
controlling the first valve to close and the second valve to open.
3. The method of claim 1, further comprising:
and if a protection instruction transmitted by a digital electro-hydraulic control system of the steam turbine generator unit is received, controlling the valve to be closed.
4. The method of claim 1, wherein the first valve is an on-off valve.
5. The method according to claim 1, wherein the instruction transmission device is a remote terminal unit of a steam turbine generator unit or a steam turbine digital electro-hydraulic control system of the steam turbine generator unit, and the frequency modulation instruction is an automatic power generation control instruction transmitted by the remote terminal unit or a primary frequency modulation instruction transmitted by the steam turbine digital electro-hydraulic control system.
6. The method of claim 1, wherein the cylinder comprises a high pressure cylinder, an intermediate pressure cylinder and a low pressure cylinder, the heater comprises a first high pressure heater connected with the high pressure cylinder, a second high pressure heater connected with the intermediate pressure cylinder and a low pressure heater correspondingly connected with the low pressure cylinder, wherein the first valve is arranged between the first high pressure heater and the high pressure cylinder, between the second high pressure heater and the intermediate pressure cylinder and between the low pressure cylinder and the low pressure heater, and the controlling the current opening and closing state of the valve arranged between the cylinder and the heater of the turbo generator set and associated with the valve ID to be switched to the corresponding opening degree comprises:
controlling the current opening and closing state of a first valve between the first high-pressure heater and the high-pressure cylinder, between the second high-pressure heater and the intermediate-pressure cylinder and between the low-pressure cylinder and the low-pressure heater to be switched to corresponding opening degrees;
or only controlling the current opening and closing state of the first valve between the low-pressure cylinder and the low-pressure heater to be switched to the corresponding opening degree.
7. The utility model provides a turbo generator set frequency modulation device which characterized in that includes:
an instruction receiving unit configured to receive a frequency modulation instruction transmitted by an instruction transmitting device;
the instruction analysis unit is configured to analyze the frequency modulation instruction and acquire a frequency modulation amplitude value and a frequency carried in the frequency modulation instruction;
the information searching unit is configured to search the valve IDs and the opening degrees corresponding to the valve IDs according to the frequency modulation amplitude and frequency and a preset mapping relation table;
and the valve control unit is configured to control the current opening and closing state of a valve which is arranged between a cylinder of the steam turbine generator unit and the heater and is associated with the valve ID to be switched to a corresponding opening degree.
8. The device of claim 7, wherein a first valve and a second valve connected in parallel with the first valve are arranged between a cylinder of the turbo generator set and a heater, wherein the first valve is a regulating valve, the second valve is an on-off valve, the amount of steam extracted from the heater by the cylinder when the second valve is opened and the first valve is closed is 10% -20% of the amount of steam extracted from the heater by the cylinder when the first valve is opened and the second valve is closed, the frequency modulation command is a secondary frequency modulation command,
the valve control unit is further configured to control the first valve to close and the second valve to open.
9. The apparatus of claim 8, wherein the valve control unit is further configured to control the valve to close if a protection command transmitted by a digital electro-hydraulic control system of a steam turbine of the steam turbine generator unit is received.
10. The apparatus of claim 7, wherein the first valve is a regulator valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911094234.6A CN110778368B (en) | 2019-11-11 | 2019-11-11 | Frequency modulation method and device for steam turbine generator unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911094234.6A CN110778368B (en) | 2019-11-11 | 2019-11-11 | Frequency modulation method and device for steam turbine generator unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110778368A true CN110778368A (en) | 2020-02-11 |
| CN110778368B CN110778368B (en) | 2022-04-12 |
Family
ID=69391021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911094234.6A Active CN110778368B (en) | 2019-11-11 | 2019-11-11 | Frequency modulation method and device for steam turbine generator unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110778368B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4577281A (en) * | 1983-12-16 | 1986-03-18 | Westinghouse Electric Corp. | Method and apparatus for controlling the control valve setpoint mode selection for an extraction steam turbine |
| CN102278148A (en) * | 2010-06-12 | 2011-12-14 | 中国电力工程顾问集团华东电力设计院 | Full-period steam inlet steam turbine generator unit and primary frequency adjusting method thereof |
| CN102537933A (en) * | 2011-12-30 | 2012-07-04 | 冯伟忠 | Adjustable feed water heat regenerative system for turbo generator unit |
| CN107218087A (en) * | 2017-06-09 | 2017-09-29 | 杭州华电下沙热电有限公司 | A kind of frequency modulation control mechanism and method in Turbo-generator Set |
| DE102016212634A1 (en) * | 2016-07-12 | 2018-01-18 | Siemens Aktiengesellschaft | Method for secondary frequency control of a fossil-fired power plant |
| CN109378833A (en) * | 2018-10-30 | 2019-02-22 | 山西河坡发电有限责任公司 | A method of unit fast frequency hopping is realized by control extraction flow of steam |
| CN109638861A (en) * | 2018-12-25 | 2019-04-16 | 国网陕西省电力公司电力科学研究院 | A kind of supercritical unit participates in the control method and control system model of primary frequency modulation |
| CN109915216A (en) * | 2019-04-09 | 2019-06-21 | 福州怡辉电力设备有限公司 | A kind of thermal power plant unit control steam extraction frequency modulation system and adjusting method in short-term |
| CN110048436A (en) * | 2019-04-30 | 2019-07-23 | 国家能源投资集团有限责任公司 | Power grid frequency modulation control method and device |
| EP3518365A1 (en) * | 2013-11-06 | 2019-07-31 | Reactive Technologies Limited | Grid frequency response |
| EP3540896A1 (en) * | 2018-01-31 | 2019-09-18 | Beijing Goldwind Science & Creation Windpower Equipment Co., Ltd. | Method and apparatus for primary frequency control of wind power generator |
-
2019
- 2019-11-11 CN CN201911094234.6A patent/CN110778368B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4577281A (en) * | 1983-12-16 | 1986-03-18 | Westinghouse Electric Corp. | Method and apparatus for controlling the control valve setpoint mode selection for an extraction steam turbine |
| CN102278148A (en) * | 2010-06-12 | 2011-12-14 | 中国电力工程顾问集团华东电力设计院 | Full-period steam inlet steam turbine generator unit and primary frequency adjusting method thereof |
| CN102537933A (en) * | 2011-12-30 | 2012-07-04 | 冯伟忠 | Adjustable feed water heat regenerative system for turbo generator unit |
| EP3518365A1 (en) * | 2013-11-06 | 2019-07-31 | Reactive Technologies Limited | Grid frequency response |
| DE102016212634A1 (en) * | 2016-07-12 | 2018-01-18 | Siemens Aktiengesellschaft | Method for secondary frequency control of a fossil-fired power plant |
| CN107218087A (en) * | 2017-06-09 | 2017-09-29 | 杭州华电下沙热电有限公司 | A kind of frequency modulation control mechanism and method in Turbo-generator Set |
| EP3540896A1 (en) * | 2018-01-31 | 2019-09-18 | Beijing Goldwind Science & Creation Windpower Equipment Co., Ltd. | Method and apparatus for primary frequency control of wind power generator |
| CN109378833A (en) * | 2018-10-30 | 2019-02-22 | 山西河坡发电有限责任公司 | A method of unit fast frequency hopping is realized by control extraction flow of steam |
| CN109638861A (en) * | 2018-12-25 | 2019-04-16 | 国网陕西省电力公司电力科学研究院 | A kind of supercritical unit participates in the control method and control system model of primary frequency modulation |
| CN109915216A (en) * | 2019-04-09 | 2019-06-21 | 福州怡辉电力设备有限公司 | A kind of thermal power plant unit control steam extraction frequency modulation system and adjusting method in short-term |
| CN110048436A (en) * | 2019-04-30 | 2019-07-23 | 国家能源投资集团有限责任公司 | Power grid frequency modulation control method and device |
Non-Patent Citations (2)
| Title |
|---|
| 汤可怡等: "大型机组一次调频性能优化方法", 《发电设备》 * |
| 祝建飞等: "汽轮机组经济运行方式下新型一次调频技术", 《中国电力》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110778368B (en) | 2022-04-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109726909B (en) | Energy efficiency evaluation method and device, readable medium and electronic equipment | |
| Jumani et al. | Dynamic response enhancement of grid‐tied ac microgrid using salp swarm optimization algorithm | |
| Bianchi et al. | Fault-tolerant unfalsified control for PEM fuel cell systems | |
| CN109857984B (en) | Regression method and device of boiler load rate-efficiency curve | |
| Zhang et al. | Detailed modelling and parameters optimisation analysis on governing system of hydro‐turbine generator unit | |
| CN110778368B (en) | Frequency modulation method and device for steam turbine generator unit | |
| CN107515811B (en) | Method and device for acquiring power consumption of application program | |
| CN110865538B (en) | Unit working condition optimization method and device and electronic equipment | |
| CN105373008A (en) | Full physics model simulation method for electric power system | |
| CN111639011A (en) | Data monitoring method, device and equipment | |
| CN114819958A (en) | Transaction processing method, device and equipment based on block chain | |
| CN109669486B (en) | Controller performance evaluation method and device, readable medium and electronic equipment | |
| CN112683543A (en) | Gas-steam combined cycle unit phase-feed capacity cooperative test method and device | |
| Dadkhah Tehrani et al. | Performance improvement of fuel cells using perturbation‐based extremum seeking and model reference adaptive control | |
| CN111901155A (en) | Internet of things debugging method, device and system and storage medium | |
| CN112865176B (en) | Isolated network switching control method, system, device and storage medium | |
| CN110334385A (en) | Test method, device and the equipment of integrated energy system central controller | |
| CN109858119B (en) | Dynamic energy efficiency modeling method and device, readable medium and electronic equipment | |
| CN110009477B (en) | Interest meter lifting method, system and equipment | |
| CN113606002A (en) | Low-pressure cylinder zero-output heat supply system and method | |
| CN111769587A (en) | Power grid frequency modulation control method and device with participation of photovoltaic power generation | |
| CN110879537A (en) | Method and device for processing transient stability of intelligent household energy system | |
| CN112862138A (en) | Thermal load prediction method and device, readable medium and electronic equipment | |
| US20220398366A1 (en) | Nonlinear Model Modeling Method, Device and Storage Medium | |
| Das et al. | A novel mine blasting algorithm optimized DFOPI-TIDN controller for VIC of multi-area power systems |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |