CN110263405B - Method and device for linearizing output of gas engine - Google Patents
Method and device for linearizing output of gas engine Download PDFInfo
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- CN110263405B CN110263405B CN201910508038.2A CN201910508038A CN110263405B CN 110263405 B CN110263405 B CN 110263405B CN 201910508038 A CN201910508038 A CN 201910508038A CN 110263405 B CN110263405 B CN 110263405B
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Abstract
The invention discloses a method, a device, a readable medium and electronic equipment for linearization of gas engine output, wherein the method comprises the following steps: determining a nonlinear output model of the gas engine; acquiring a first output curve corresponding to the nonlinear output model of the gas engine; and carrying out linearization processing on the first output curve to determine a linear output model of the gas engine. Through the technical scheme of the invention, the nonlinear output model of the gas engine can be linearized, and the linear output model is determined.
Description
Technical Field
The invention relates to the technical field of energy, in particular to a method and a device for linearizing output of a gas engine.
Background
Gas engines have been widely used in the energy field as a main power generation facility.
At present, when the operating condition of a gas engine is researched, the output model is solved mainly by constructing the output model between the residual heat and the output of the gas engine, and the output information of the gas engine is determined.
However, the output model determined in the above manner is nonlinear, that is, the gas engine output is nonlinear, which increases the calculation difficulty and time for solving the output model. Therefore, it is an urgent need to solve the problem of linearizing the output of the gas turbine.
Disclosure of Invention
The invention provides a method and a device for linearizing output of a gas engine, a computer readable storage medium and electronic equipment, which can linearize a nonlinear output model of the gas engine and determine the linear output model.
In a first aspect, the present invention provides a method for linearizing output of a gas engine, comprising:
determining a nonlinear output model of the gas engine;
acquiring a first output curve corresponding to the nonlinear output model of the gas engine;
and carrying out linearization processing on the first output curve to determine a linear output model of the gas engine.
Preferably, the first and second liquid crystal display panels are,
the linearizing the first output curve to determine a linear output model of the gas engine includes:
determining at least two second output curves according to the first output curve;
and linearizing each second output curve to determine a linear output model of the gas engine.
Preferably, the first and second electrodes are formed of a metal,
the nonlinear output model of the gas engine comprises:
wherein F represents the input power of the gas engine, P MT Characterizing the output, eta, of a gas engine MT Representing the power generation efficiency of the gas engine;
the objective function in the linear output model includes:
wherein the content of the first and second substances,
input Power, K, characterizing the time period t i The slope P of the second output curve representing the ith section i (t) characterizing the output force M of the second output curve of the ith segment in the time period t i The intercept B of the second output curve representing the i-th section i (t) characterizing the state variable of the ith second output curve in a time period t, and N characterizing the number of sections of the second output curve;
the constraints in the linear output model include:
M i ＝F i -P i K i
P i (t)B i (t)≤P i (t)≤P i+1 (t)B i+1 (t)
wherein, F i Minimum input power, F, characterizing the second output curve of the i-th section i+1 Maximum input power, P, characterizing the second output curve of the i-th section i Minimum force, P, characterizing the second force curve of the i-th segment i+1 Maximum output, P, characterizing the i-th section of the output curve i+1 (t) characterizing the maximum output of the second output curve of the i-th section in a time period t, B i+1 (t) characterizing the state variable corresponding to the maximum output of the ith section of the second output curve in the time period t.
Preferably, the first and second liquid crystal display panels are,
the state variables comprise a parameter 1 for representing that the gas engine is in a starting state and a parameter 0 for representing that the gas engine is in a shutdown state.
Preferably, the first and second liquid crystal display panels are,
further comprising: acquiring rated power of the gas engine;
then the process of the first step is carried out,
determining at least two second force curves from the first force curve, including:
determining a load interval corresponding to the first output curve according to the rated power, and determining at least one critical load rate according to the load interval;
and determining a coordinate point of the critical load rate on the first output curve, and dividing the first output curve according to the coordinate point to determine at least two second output curves.
Preferably.
The obtaining of the first output curve corresponding to the nonlinear model includes:
acquiring historical operation information of the gas engine;
and substituting the historical operation information into the nonlinear output model to determine a first output curve.
In a second aspect, the present invention provides a method for determining output information of a gas engine, including:
acquiring a linear output model, at least one load information and at least one equipment information of a gas engine;
and determining the output information of the gas engine according to the load information, the equipment information and the linear output model.
In a third aspect, the present invention provides a gas engine output linearization device, including:
the first model determining module is used for determining a nonlinear output model of the gas engine;
the first acquisition module is used for acquiring a first output curve corresponding to the nonlinear output model of the gas engine;
and the second model determining module is used for carrying out linearization processing on the first output curve so as to determine a linear output model of the gas engine.
Preferably, the first and second electrodes are formed of a metal,
the second model determination module comprising: a dividing unit and a model determining unit;
the dividing unit is used for determining at least two second output curves according to the first output curve;
the model determining unit is used for linearizing each second output curve to determine a linear output model of the gas engine.
Preferably, the first and second electrodes are formed of a metal,
the nonlinear output model of the gas engine comprises:
wherein F represents the input power of the gas engine, P MT Characterizing the output, eta, of a gas engine MT Representing the power generation efficiency of the gas engine;
the objective function in the linear output model includes:
wherein the content of the first and second substances,
input Power, K, characterizing the time period t i The slope and P of the second output curve representing the ith segment i (t) characterizing the output force M of the second output curve of the ith segment in the time period t i Intercept characterizing the second output curve of the i-th section、B i (t) characterizing the state variable of the ith second output curve in a time period t, and N characterizing the number of sections of the second output curve;
the constraints in the linear output model include:
M i ＝F i -P i K i
P i (t)B i (t)≤P i (t)≤P i+1 (t)B i+1 (t)
wherein, F i Minimum input power, F, characterizing the second output curve of the i-th section i+1 Maximum input power, P, characterizing the second output curve of the i-th section i Minimum force, P, characterizing the second force curve of the i-th segment i+1 Maximum force, P, characterizing the i-th force curve i+1 (t) characterizing the maximum output of the second output curve of the i-th section in a time period t, B i+1 (t) characterizing the state variable corresponding to the maximum output of the second output curve of the ith section in the time period t.
Preferably, the first and second liquid crystal display panels are,
the state variables comprise a parameter 1 representing that the gas engine is in a starting state and a parameter 0 representing that the gas engine is in a shutdown state.
Preferably, the first and second liquid crystal display panels are,
further comprising: a second acquisition module;
the second obtaining module is used for obtaining the rated power of the gas engine;
then, the dividing unit comprises a load rate determining subunit and a curve dividing subunit;
the load rate determining subunit is configured to determine a load interval corresponding to the first output curve according to the rated power, and determine at least one critical load rate according to the load interval;
and the curve dividing subunit is used for determining a coordinate point of the critical load factor corresponding to the first output curve, and dividing the first output curve according to the coordinate point to determine at least two second output curves.
Preferably, the first and second liquid crystal display panels are,
the first obtaining module includes: an acquisition unit and a curve determination unit; wherein the content of the first and second substances,
the acquisition unit is used for acquiring historical operation information of the gas engine;
and the curve determining unit is used for substituting the historical operation information into the nonlinear output model to determine a first output curve.
In a fourth aspect, the present invention provides a computer-readable storage medium comprising executable instructions which, when executed by a processor of an electronic device, perform the method according to any one of the first and second aspects.
In a fifth aspect, the present invention provides an electronic device, which includes a processor and a memory storing execution instructions, wherein when the processor executes the execution instructions stored in the memory, the processor performs the method according to any one of the first and second aspects.
The invention provides a method and a device for linearizing output of a gas engine, a computer readable storage medium and electronic equipment. In summary, according to the technical scheme of the invention, the nonlinear output model of the gas engine can be linearized, and the linear output model can be determined.
Further effects of the above-mentioned unconventional preferred modes will be described below in conjunction with specific embodiments.
Drawings
In order to more clearly illustrate the embodiments or the prior art solutions of the present invention, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart illustrating a method for linearizing output of a gas turbine according to an embodiment of the present invention;
fig. 2 is a schematic flow chart illustrating a process of determining output information of a gas engine according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a gas engine output linearization apparatus according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of another gas engine output linearization apparatus according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of another gas engine output linearization apparatus according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of another gas engine output linearization apparatus according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments and corresponding drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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 invention.
In the prior art, the influence of the environment on the gas engine is not considered, and the formula of the power generation efficiency of the gas engine is as follows:
wherein eta MT Representing the power generation efficiency; p MT (t) characterizing an output power for a t period; p is MT，max Characterizing a maximum value of output power for a t period; a. b, c and d are constants.
The gas engine is usually combined with the refrigerator, the residual heat of the gas engine provides heat for the refrigerator, the refrigerator generates refrigerating capacity and heating capacity by utilizing the heat provided by the residual heat of the gas engine, and a mathematical model of the refrigerating and heating of the gas engine is as follows:
Q MT，c (t)＝Q MT (t)η MT，c η rec
Q MT，h (t)＝Q MT (t)η MT，h η rec
wherein Q MT，c (t) characterizing the cooling capacity of the refrigerator in a t period; q MT (t) representing the residual heat quantity of the gas engine in a t period; eta MT，c Characterizing the refrigeration coefficient of the refrigerator; eta rec Characterizing the flue gas recovery rate of the refrigerator; q MT，h (t) characterizing the heating capacity of the refrigerator in a t period; eta MT，h Characterizing a heating coefficient of the refrigerator; eta MT，l And (4) representing the heat loss coefficient of the gas engine.
In summary, the nonlinear output function of the gas engine is as follows:
it can be seen from the nonlinear output function that the residual heat quantity of the gas engine and the output power (i.e. output) of the gas engine present a nonlinear relationship, so that the calculation difficulty and the calculation time are increased when the mathematical model is solved.
As shown in fig. 1, an embodiment of the present invention provides a method for linearizing output of a gas engine, including the following steps:
102, acquiring a first output curve corresponding to a nonlinear output model of the gas engine;
In the embodiment shown in fig. 1, the method obtains a first output curve corresponding to the nonlinear output model of the gas engine by determining the nonlinear output model of the gas engine, and performs linearization processing on the first output curve to determine the linear output model of the gas engine. In summary, according to the technical scheme of the invention, the nonlinear output model of the gas engine can be linearized, and the linear output model can be determined.
Correspondingly, when a certain model comprises the nonlinear output model of the gas engine, the nonlinear output model can be linearized according to the technical scheme provided by the invention in the model solving process, so that the model can be solved more quickly, the calculation difficulty is reduced, and the calculation time is saved.
Specifically, the first output curve corresponding to the nonlinear output model of the gas engine can reflect the output condition of the gas engine. The first output curve indicates a functional relationship between the output of the gas engine and a parameter affecting the output, and it is apparent that the independent variable of the first output curve is the output of the gas engine.
In an embodiment of the present invention, the linearizing the first output curve to determine the linear output model of the gas engine includes:
determining at least two second output curves according to the first output curve;
and linearizing each second output curve to determine a linear output model of the gas engine.
Specifically, the first output curve is divided into a plurality of second output curves in combination with an actual service scene, and each second output curve is subjected to linearization output, so that the first output curve can be linearized. Here, the first output curve is an increasing curve, and in general, the data at both ends of the second output curve is the extreme value of the second output curve.
In an embodiment of the present invention, the nonlinear output model of the gas engine includes:
wherein F represents the input power of the gas engine, P MT Characterizing the output, eta, of a gas engine MT Representing the power generation efficiency of the gas engine;
the objective function in the linear output model includes:
wherein the content of the first and second substances,
input Power, K, characterizing the time period t i The slope and P of the second output curve representing the ith segment i (t) characterizing the output force M of the second output curve of the ith segment in the time period t i The intercept B of the second output curve representing the i-th section i (t) characterizing the state variable of the ith second output curve in a time period t, and N characterizing the number of sections of the second output curve;
the constraints in the linear output model include:
M i ＝F i -P i K i
P i B i (t)≤P i (t)≤P i+1 B i+1 (t)
wherein, F i Minimum input power, F, characterizing the second output curve of the i-th section i+1 Maximum input power, P, characterizing the second output curve of the i-th section i Minimum force, P, characterizing the second force curve of the i-th segment i+1 Maximum output, P, characterizing the i-th section of the output curve i+1 (t) characterizing the maximum output of the second output curve of the i-th section in a time period t, B i+1 (t) characterizing the state variable corresponding to the maximum output of the ith section of the second output curve in the time period t.
Here, the nonlinear output model is a ratio of output to power generation efficiency, and generally, the power generation efficiency is a ratio of output to input power, that is, an independent variable in the nonlinear output model is output, and a dependent variable is input power.
Specifically, considering that the output of the gas engine in a certain period of time changes in an output interval (output power interval), the first output curve is divided into a plurality of second output curves, in order to linearize the second output curves more easily, a state variable is introduced, for each second output curve, two end point values of the second output curve are substituted into a preset linear equation to be solved, the slope and the intercept of the preset linear equation are determined, the product of the state variable and the intercept is determined as a target intercept, then, the slope and the target intercept are substituted into the preset linear equation to obtain linear expressions of the second output curves, at this time, the sum of the linear expressions corresponding to each second output curve is determined as the linear output function of the gas engine, and the first output curve can be linearized according to the linear output function.
Specifically, the sum of the state variables in the linear output function is not greater than 1, that is, when the gas engine is in the operating state, the output information corresponding to the gas engine is on a certain second linear output curve.
For example, for each second force curve, assume that the two end points of the second force curve are (P) i ，F i ) And (P) i+1 ，F i+1 ) Then the slope K i Is composed of
Intercept M i Is F i -P i K i Or F i+1 -P i+1 K i . State variable B i (t) comprises a parameter 1 representing that the gas engine is in a startup state and a parameter 0 representing that the gas engine is in a shutdown state, and for each second output curve, B i (t) and B i+1 (t) same, it is apparent that the gas engine outputs power P during the period t i (t) is not less than P i B i (t) not more than P i+1 B i+1 (t), namely, the output of the gas engine in the t period is positioned on a certain second linearized output curve.
In one embodiment of the present invention, the state variables include a parameter 1 representing that the gas engine is in a startup state and a parameter 0 representing that the gas engine is in a shutdown state;
specifically, the state variables include a parameter 1 representing that the gas engine is in a startup state and a parameter 0 representing that the gas engine is in a shutdown state, and the sum of the state variables in the linear output function is not greater than 1, that is, when the gas engine is in an operating state, the output information corresponding to the gas engine is a certain linear second output curve.
In one embodiment of the present invention, the method further comprises: acquiring rated power of the gas engine;
then, said determining at least two second output curves from said first output curve comprises:
determining a load interval corresponding to the first output curve according to the rated power, and determining at least one critical load rate according to the load interval;
and determining a coordinate point of the critical load rate on the first output curve, and dividing the first output curve according to the coordinate point to determine at least two second output curves.
Specifically, in consideration of an actual operation condition of the device, for example, a load factor of the device during operation in a certain period fluctuates within a certain range, a ratio of a maximum output power of the first output curve to a rated capacity is determined as a maximum load factor, a load interval is formed by using zero and the maximum load factor, then, the load interval is divided to determine a plurality of critical load factors, the critical load factors may be load factors in which the number of occurrences of the gas engine in a historical operation process is relatively frequent, then, coordinate points of the critical load factors corresponding to the first output curve are determined, then, the first output curve is divided according to the coordinate points to obtain at least two second output curves, and the obtained second output curves can more accurately reflect the output power interval of the gas engine.
For example, in one possible implementation manner, the load interval corresponding to the first output curve is [ a, b ]]The load interval can be divided into c parts, and the critical load ratios are respectively
Here, the number of shares averaged in the load interval may be determined by combining the actual operating condition of the gas engine, so as to ensure that the obtained second output curve can more accurately reflect the output power interval of the gas engine.
It should be noted that, if the critical load factor is a ratio of the output power to the rated power, determining a coordinate point of each critical load factor on the first output curve specifically means that a product of the critical load factor and the rated power is equal to an output power value at the coordinate point on the first output curve.
In one possible implementation, the load interval may be divided according to an actual service scenario to determine the critical load rate, for example, the critical load rate may be determined as 0%, 30%, 50%, 80%, 90%, and 100%.
In an embodiment of the present invention, the obtaining of the first output curve corresponding to the nonlinear model includes:
acquiring historical operation information of the gas engine;
and substituting the historical operation information into the nonlinear output model to determine a first output curve.
Specifically, the first output curve is determined according to the historical operation information, so that the output condition of the gas engine can be reflected more accurately by the first output curve, the independent variable of the first output curve is output, and the dependent variable is a parameter influencing the output, for example, the parameter can be input power.
It should be noted that the historical operating information of the gas engine includes the output and the parameter that affects the output, and obviously, the nonlinear output model indicates the relationship between the output and the parameter that affects the output of the gas engine.
In a possible implementation manner, a plurality of historical operating information of the gas engine is acquired at preset time intervals, for example, 1 minute, the historical operating information includes input power and output power, a confidence interval of the output power at a certain confidence level (for example, 95%) is determined, and accordingly, the historical operating information corresponding to the output power in the confidence interval can be determined, and then, each historical operating information in the confidence interval can be substituted into the nonlinear output model to determine a first output curve, an independent variable of the first output curve is the output power, a dependent variable is the input power, and meanwhile, the first output curve can reflect the output condition of the gas engine more accurately.
Referring to fig. 2, an embodiment of the present invention provides a method for determining output information of a gas engine, including the following steps:
and 202, determining the output information of the gas engine according to the load information, the equipment information and the linear output model.
According to the embodiment shown in fig. 2, the method obtains the linear output model of the gas engine, a plurality of pieces of load information and a plurality of pieces of equipment information, and then determines the output information of the gas engine according to the load information, the equipment information and the linearized first output function. In summary, according to the technical scheme of the invention, compared with the nonlinear output model, in the process of determining the output information of the gas engine according to the load information, the equipment information and the linear output model, the calculation difficulty and the calculation time are reduced, and the output information of the gas engine can be determined more quickly.
In particular, the output information includes, but is not limited to, the output power or/and the output power interval, considering that the actual operating state of the gas engine is influenced by the load demand and the surrounding environment.
Specifically, the gas engine and the refrigeration equipment may form a Combined Cooling and Heating and Power (CCHP) system, and may form a comprehensive energy system or a micro-grid system with the new energy Power generation system.
Specifically, the method is described by taking a combined heat and power system as an example, in a possible implementation manner, load information, device information and a linear output model of a gas engine are substituted into a preset energy efficiency model or/and a scheduling model of the combined heat and power system, an optimal solution of the energy efficiency model or/and the scheduling model is solved by using a genetic algorithm or a particle swarm algorithm, and output information of the gas engine in the combined heat and power system is determined.
It should be noted that the load information and the equipment information of the gas engine need to be determined in combination with the actual service scenario requirements, where the load information includes, but is not limited to, the load requirements and the load constraints of the gas engine, where the load constraints indicate a functional relationship between the output power of the gas engine and the output power of other equipment, and the equipment information includes, but is not limited to, the output power interval and the number of equipment of the gas engine.
Based on the same concept as the method embodiment of the present invention, referring to fig. 3, an embodiment of the present invention further provides a gas engine output linearization apparatus, including:
a first model determining module 301, configured to determine a nonlinear output model of a gas engine;
a first obtaining module 302, configured to obtain a first output curve corresponding to a nonlinear output model of the gas engine;
the second model determining module 303 is configured to perform linearization on the first output curve to determine a linear output model of the gas engine.
Referring to fig. 4, in an embodiment of the present invention, the second model determining module 303 includes: a dividing unit 3031 and a model determining unit 3032;
the dividing unit 3031 is configured to determine at least two second output curves according to the first output curve;
the model determining unit 3032 is configured to linearize each second output curve to determine a linear output model of the gas engine.
In an embodiment of the present invention, the nonlinear output model of the gas engine includes:
wherein F represents the input power of the gas engine, P MT Characterizing the output, eta, of a gas engine MT Representing the power generation efficiency of the gas engine;
the objective function in the linear output model includes:
wherein the content of the first and second substances,
input Power, K, characterizing a time period t i The slope and P of the second output curve representing the ith segment i (t) characterizing the i-th segment of the second force curve at that timeOutput of section t, M i The intercept B of the second output curve representing the i-th section i (t) characterizing the state variable of the ith second output curve in a time period t, and N characterizing the number of sections of the second output curve;
the constraints in the linear output model include:
M i ＝F i -P i K i
P i (t)B i (t)≤P i (t)≤P i+1 (t)B i+1 (t)
wherein, F i Minimum input power, F, characterizing the second output curve of the i-th section i+1 Maximum input power, P, characterizing the second output curve of the i-th segment i Minimum force, P, characterizing the second force curve of the i-th segment i+1 Maximum force, P, characterizing the i-th force curve i+1 (t) characterizing the maximum output of the second output curve of the i-th section in a time period t, B i+1 (t) characterizing the state variable corresponding to the maximum output of the ith section of the second output curve in the time period t.
In an embodiment of the present invention, the state variables include a parameter 1 representing that the gas engine is in a power-on state and a parameter 0 representing that the gas engine is in a power-off state.
Referring to fig. 5, in an embodiment of the present invention, the method further includes: a second obtaining module 304; the second obtaining module is used for obtaining the rated power of the gas engine;
then the user can use the device to make a visual display,
the dividing unit 3031 comprises a load factor determining subunit 30311 and a curve dividing subunit 30312;
the load factor determining subunit 30311 is configured to determine a load interval corresponding to the first output curve according to the rated power, and determine at least one critical load factor according to the load interval;
the curve dividing subunit 30312 is configured to determine a coordinate point of the critical load factor on the first output curve, and divide the first output curve according to the coordinate point to determine at least two second output curves.
Referring to fig. 6, in an embodiment of the present invention, the first obtaining module 302 includes: an acquisition unit 3021 and a curve determination unit 3022; wherein, the first and the second end of the pipe are connected with each other,
the acquisition unit 3021 configured to acquire historical operation information of the gas engine;
the curve determining unit 3022 is configured to substitute the historical operation information into the nonlinear output model to determine a first output curve.
Fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present invention. On the hardware level, the electronic device includes a processor 701 and a memory 702 storing execution instructions, and optionally further includes an internal bus 703 and a network interface 704. The Memory 702 may include a Memory 7021, such as a Random-Access Memory (RAM), and may further include a non-volatile Memory 7022 (e.g., at least 1 disk Memory); the processor 701, the network interface 704, and the memory 702 may be connected to each other by an internal bus 703, and the internal bus 703 may be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, an EISA (Extended Industry Standard Architecture) bus, or the like; the internal bus 703 may be divided into an address bus, a data bus, a control bus, etc., which is indicated by a double-headed arrow in fig. 7 for convenience of illustration, but does not indicate only one bus or one type of bus. Of course, the electronic device may also include hardware required for other services. When the processor 701 executes the execution instructions stored in the memory 702, the processor 701 executes the method according to any of the embodiments of the present invention, and at least is configured to execute the method shown in fig. 1 and fig. 2.
In a possible implementation mode, the processor reads corresponding execution instructions from the nonvolatile memory into the memory and then runs the corresponding execution instructions, and corresponding execution instructions can also be obtained from other devices, so that a gas engine output linearization device is formed on a logic level. The processor executes the execution instructions stored in the memory to realize a method for linearizing the output of the gas engine provided by any embodiment of the invention through the executed execution instructions.
The processor 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 in a processor or instructions in the form of software. The Processor 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 invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
Embodiments of the present invention further provide a computer-readable storage medium, which includes an execution instruction, and when a processor of an electronic device executes the execution instruction, the processor executes a method provided in any one of the embodiments of the present invention. The electronic device may specifically be the electronic device shown in fig. 7; the execution instruction is a computer program corresponding to the gas engine output linearization device.
It should be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects.
The embodiments of the present invention are described in a progressive manner, and the same and similar parts among the embodiments can be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, as for the apparatus embodiment, since it is substantially similar to the method embodiment, the description is relatively simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
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 boiler 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 boiler. Without further limitation, an element defined by the phrases "comprising a" \8230; "does not exclude the presence of additional like elements in the process, method, article, or boiler comprising the element.
The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (5)
1. A method of linearizing gas engine output, comprising:
determining a nonlinear output model of the gas engine;
acquiring historical operation information of the gas engine, substituting the historical operation information into the nonlinear output model, and determining a first output curve;
determining at least two second output curves according to the first output curve, and linearizing each second output curve to determine a linear output model of the gas engine;
the nonlinear output model of the gas engine comprises the following components:
wherein F represents the input power of the gas engine, P MT Characterizing the output, η, of a gas engine MT Representing the power generation efficiency of the gas engine;
the objective function in the linear output model includes:
wherein the content of the first and second substances,
input Power, K, characterizing the time period t i The slope P of the second output curve representing the ith section i (t) characterizing the force output, M, of the second force output curve of the i-th section in a time period t i The intercept B of the second output curve representing the i-th section i (t) characterizing the state variable of the ith second output curve in a time period t, and N characterizing the number of sections of the second output curve;
the constraints in the linear output model include:
M i ＝F i -P i K i
P i (t)B i (t)≤P i (t)≤P i+1 (t)B i+1 (t)
wherein, F i Minimum input power, F, characterizing the second output curve of the i-th section i+1 Maximum input power, P, characterizing the second output curve of the i-th section i Minimum force, P, characterizing the second force curve of the i-th segment i+1 Characterise the ith sectionMaximum force of force curve, P i+1 (t) characterizing the maximum output of the second output curve of the ith segment at time period t, B i+1 (t) characterizing a state variable corresponding to the maximum output of the ith section of the second output curve in a time period t, wherein the state variable comprises a parameter 1 for characterizing that the gas engine is in a startup state and a parameter 0 for characterizing that the gas engine is in a shutdown state;
alternatively, the first and second liquid crystal display panels may be,
acquiring rated power of the gas engine; then, said determining at least two second output curves from said first output curve comprises:
determining a load interval corresponding to the first output curve according to the rated power, and determining at least one critical load rate according to the load interval;
and determining a coordinate point of the critical load rate on the first output curve, and dividing the first output curve according to the coordinate point to determine at least two second output curves.
2. A method for determining output information of a gas engine, comprising:
acquiring the linear output model, the at least one load information and the at least one device information of the gas engine of claim 1;
and determining the output information of the gas engine according to the load information, the equipment information and the linear output model.
3. A gas engine output linearization apparatus, comprising:
the first model determining module is used for determining a nonlinear output model of the gas engine;
the first acquisition module is used for acquiring a first output curve corresponding to the nonlinear output model of the gas engine; the first obtaining module includes: an acquisition unit and a curve determination unit; the acquiring unit is used for acquiring historical operation information of the gas engine; the curve determining unit is used for substituting the historical operation information into the nonlinear output model to determine a first output curve;
the second model determining module is used for carrying out linearization processing on the first output curve so as to determine a linear output model of the gas engine;
the second model determination module comprising: a dividing unit and a model determining unit;
the dividing unit is used for determining at least two second output curves according to the first output curve;
the model determining unit is used for linearizing each second output curve to determine a linear output model of the gas engine;
the nonlinear output model of the gas engine comprises the following components:
wherein F represents the input power of the gas engine, P MT Characterizing the output, eta, of a gas engine MT Representing the power generation efficiency of the gas engine;
the objective function in the linear output model includes:
wherein, the first and the second end of the pipe are connected with each other,
input Power, K, characterizing a time period t i The slope and P of the second output curve representing the ith segment i (t) characterizing the force output, M, of the second force output curve of the i-th section in a time period t i The intercept B of the second output curve representing the i-th section i (t) characterizing the state variable of the ith second output curve in a time period t, and N characterizing the number of sections of the second output curve;
the constraints in the linear output model include:
M i ＝F i -P i K i
P i (t)B i (t)≤P i (t)≤P i+1 (t)B i+1 (t)
wherein, F i Minimum input power, F, characterizing the second output curve of the i-th section i+1 Maximum input power, P, characterizing the second output curve of the i-th segment i Minimum force, P, characterizing the second force curve of the i-th segment i+1 Maximum output, P, characterizing the i-th section of the output curve i+1 (t) characterizing the maximum output of the second output curve of the ith segment at time period t, B i+1 (t) characterizing a state variable corresponding to the maximum output of the ith section of the second output curve in a time period t, wherein the state variable comprises a parameter 1 for characterizing that the gas engine is in a startup state and a parameter 0 for characterizing that the gas engine is in a shutdown state;
further comprising: a second acquisition module; the second obtaining module is used for obtaining the rated power of the gas engine; then, the dividing unit comprises a load rate determining subunit and a curve dividing subunit;
the load rate determining subunit is configured to determine a load interval corresponding to the first output curve according to the rated power, and determine at least one critical load rate according to the load interval;
and the curve dividing subunit is used for determining a coordinate point of the critical load rate on the first output curve, and dividing the first output curve according to the coordinate point to determine at least two second output curves.
4. A computer-readable storage medium comprising executable instructions that, when executed by a processor of an electronic device, cause the processor to perform the method of any of claims 1-2.
5. An electronic device comprising a processor and a memory storing execution instructions, the processor performing the method of any of claims 1-2 when the processor executes the execution instructions stored by the memory.
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