CN115173415A - Comprehensive energy system and optimal regulation and control method - Google Patents
Comprehensive energy system and optimal regulation and control method Download PDFInfo
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Abstract
The application relates to a comprehensive energy system and an optimized regulation and control method for the comprehensive energy system, wherein the system comprises an electric energy subsystem, a heat energy subsystem and a load regulation and control subsystem, further, the electric energy subsystem comprises a power generation device, an electric energy storage device and an electric temperature regulation device, and the heat energy subsystem comprises a heat energy storage device, an absorption type temperature regulation device and an organic Rankine cycle device; based on the random volatility of renewable energy and the stability of non-renewable energy, each part is coupled and complemented to form an optimized regulation and control system with stable electric load, heat load and cold load output.
Description
Technical Field
The application relates to the technical field of micro energy networks, in particular to a comprehensive energy system and an optimized regulation and control method thereof.
Background
With the development of new energy power generation technology, clean energy power generation technology, energy storage technology and information technology, the high-efficiency interconnection of energy and the friendly interaction at the user side are supported by using the information technologies such as the Internet of things, big data and cloud computing, and the energy Internet with coordinated development and integrated complementation of source-network-load-storage-use is formed by combining transverse multi-energy complementation with longitudinal source, network, storage and the like, so that the change of the energy service pattern in China is powerfully promoted; under the implementation of the national 'double-carbon' target, the energy supply mode gradually develops from a centralized mode to a direction of fully utilizing renewable energy sources and the like according to different application scenes and in combination with local resources.
The micro energy system which is put into production recently is researched and researched, the comprehensive energy utilization rate of most of the existing micro energy systems is lower than 80%, the permeability of renewable energy under the whole working condition is lower than 60%, the flexible adjustment performance of the micro energy network and load matching is weak, and flexible and efficient adjustment can not be accurately carried out along with the change of electricity, heat and cold loads; the requirements of users on electricity, heat and cold cannot be flexibly matched on the premise of safety and stability, meanwhile, the cold and heat of the system and the electricity have a strong coupling relation, the heat-electrolytic coupling is difficult to realize along with the user requirements of different application scenes, and the diversified and variable energy requirements of the users are difficult to flexibly and efficiently meet.
At present, no effective solution is provided for the problems of low permeability, low comprehensive energy utilization rate, poor flexibility of system adjustment and the like of renewable energy sources under all working conditions in the related technology.
Disclosure of Invention
The embodiment of the application provides a comprehensive energy system and an optimized regulation and control method thereof, which at least solve the problems of low permeability, low comprehensive energy utilization rate, poor system regulation flexibility and the like of renewable energy sources under all working conditions in the related art.
In a first aspect, an embodiment of the present application provides an integrated energy system, which includes an electric energy subsystem and a thermal energy subsystem, where the electric energy subsystem includes:
the power generation device is used for generating power by renewable energy and non-renewable energy and generating waste heat;
the electric energy storage device is used for storing electric energy generated by the electric energy subsystem and the heat energy subsystem so as to meet the electric load requirement of a user side;
the electric temperature adjusting device is used for adjusting the temperature by utilizing the electric energy in the electric energy storage device so as to meet the temperature load requirement of a user side;
the thermal energy subsystem includes:
the heat energy storage device is used for storing heat energy in the solar energy and waste heat generated in the electric energy subsystem;
the absorption type temperature adjusting device is used for adjusting the temperature by utilizing the heat energy in the heat energy storage device so as to meet the temperature load requirement of a user side;
the organic Rankine cycle device is used for generating power by utilizing the heat energy generated by the absorption type temperature regulating device and storing the generated electric energy into the electric energy storage device;
and the load regulation and control subsystem is used for regulating and controlling load supply in real time so as to enable the generated energy of the renewable energy sources to be 100% consumed.
In some embodiments, the organic rankine cycle device is further configured to directly use waste heat generated by the power generation device to generate power, and store the generated electric energy in the electric energy storage device, wherein the waste heat is generated by non-renewable energy power generation.
In some embodiments, a module for generating power from non-renewable energy sources in the power generation device is replaced by a hot-cold-power triple supply module;
the heat, cold and electricity triple supply module is used for providing electric energy for the electric energy storage device, providing heat energy for power generation of the organic Rankine cycle device and providing heat energy for the absorption type temperature regulating device.
In some of these embodiments, the load regulation subsystem regulates the load supply in real time such that 100% of the power generation from the renewable energy source is consumed comprises:
when the comprehensive energy system operates under a first rated load, the load regulation and control subsystem regulates and controls load supply in real time, so that renewable energy sources in the power generation device run at full load in power generation, non-renewable energy sources in the power generation device generate power, and the electric energy storage device is charged and discharged, and the generated energy of the renewable energy sources is 100% consumed to meet the power demand of a user side;
when the integrated energy system operates under a second rated load, the load regulation and control subsystem regulates and controls load supply in real time, and the power generation capacity of renewable energy is 100% consumed to meet the power demand of a user side through full-load operation of renewable energy power generation in the power generation device, non-renewable energy power generation in the power generation device, power generation of the organic Rankine cycle device and charging and discharging of the electric energy storage device.
In some of these embodiments, when the integrated energy system is operating at a first rated load, the load regulation subsystem regulates load supply in real time comprising:
the load regulation and control subsystem regulates and controls load supply in real time:
generated energy P in renewable energy RE Electric energy demand P less than or equal to user side user < renewable energy generated Power P RE + non-renewable energy power generation amount P FER When the system is in use, the power generation capacity of the non-renewable energy sources and the charging and discharging of the electric energy storage device are adjusted through the full-load operation of the renewable energy sources to meet the power demand of a user side;
on the user side, the power demand P user < renewable energy Power Generation amount P RE When the system is used, the power demand of a user side is met by generating full load operation through the renewable energy sources, and the additional electric energy generated by the renewable energy sources is stored through the electric energy storage device.
In some of these embodiments, when the integrated energy system is operating at the second rated load, the load regulation subsystem regulates load supply in real time including:
the load regulation and control subsystem regulates and controls load supply in real time:
when the electric energy demand Puser at the user side is larger than or equal to the renewable energy power generation amount PRE + the non-renewable energy power generation amount PFER, the electric power demand at the user side is met through full-load operation of renewable energy power generation and non-renewable energy power generation, power generation of the organic Rankine cycle device and charging and discharging of the electric energy storage device.
In some of these embodiments, the power plant comprises an internal combustion engine module, a fuel cell module, and a wind photovoltaic module;
the internal combustion engine module and the fuel cell module are used for generating power in a form of complementation of natural gas and biomass gas and generating waste heat;
the wind power photovoltaic module is used for generating power in a form of complementation of wind energy and solar energy and generating waste heat.
In some of these embodiments, the electrical energy storage device comprises an electrochemical energy storage module, a flywheel energy storage module, and a supercapacitor module;
the electrochemical energy storage module is used for converting electric energy into chemical energy for storage;
the flywheel energy storage module is used for converting electric energy into kinetic energy to be stored;
and the super capacitor module is used for converting the electric energy into electric field energy for storage.
In some embodiments, the electric temperature regulating device comprises an electric heat pump module and an electric refrigeration module;
the electric heating pump module is used for heating by using the electric energy in the electric energy storage device to meet the heat load requirement of a user side;
and the electric refrigeration module is used for refrigerating by using the electric energy in the electric energy storage device to meet the cold load requirement of a user side.
In some of these embodiments, the absorption attemperating device includes an absorption heat pump module and an absorption refrigeration module;
the absorption heat pump module is used for heating by utilizing the heat energy in the heat energy storage device so as to meet the heat load requirement of a user side;
and the absorption refrigeration module is used for refrigerating by utilizing the heat energy in the heat energy storage device to meet the cold load requirement of a user side.
In some embodiments, the electric temperature adjusting device is used for adjusting the temperature by lithium bromide by utilizing the electric energy in the electric energy storage device;
the absorption type temperature adjusting device is used for adjusting the temperature by utilizing the heat energy in the heat energy storage device through lithium bromide.
In a second aspect, an embodiment of the present application provides an optimal regulation method, where the method is based on the system of any one of the first aspect, and the method includes:
the load supply is regulated and controlled in real time through the load regulation and control subsystem, so that the renewable energy source in the power generation device runs at full load in power generation, the non-renewable energy source power generation amount in the power generation device and the power generation amount of the organic Rankine cycle device are regulated, and the charging and discharging of the electric energy storage device are carried out, so that the power generation amount of the renewable energy source is 100% consumed to meet the power demand of a user side;
the load supply is regulated and controlled in real time through the load regulation and control subsystem, the temperature is regulated by utilizing the heat energy in the heat energy storage device through the absorption type temperature regulation device preferentially, and then the temperature is regulated by utilizing the electric energy in the electric energy storage device through the electric temperature regulation device so as to meet the temperature load requirement of a user side.
Compared with the related art, the comprehensive energy system and the optimized regulation and control method thereof provided by the embodiment of the application are characterized in that the system comprises an electric energy subsystem, a heat energy subsystem and a load regulation and control subsystem, further, the electric energy subsystem comprises a power generation device, an electric energy storage device and an electric temperature regulation device, and the heat energy subsystem comprises a heat energy storage device, an absorption type temperature regulation device and an organic Rankine cycle device; based on the random volatility of renewable energy and the stability of non-renewable energy, each component is coupled and complemented to form an optimized regulation and control system with stable electric load, heat load and cold load output, the problems that the permeability of renewable energy is low under all working conditions, the utilization rate of comprehensive energy is low, the flexibility of system regulation is poor and the like are solved, the efficient coupling cooperation of an electric-thermal process is realized, the generated energy of the renewable energy is 100% consumed, and meanwhile, the utilization rate of the renewable energy in a micro energy network is improved.
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 block diagram of an integrated energy system according to an embodiment of the present application;
fig. 2 is another block diagram of an integrated energy system according to an embodiment of the present application;
FIG. 3 is a schematic flow chart diagram of an optimal regulation method according to an embodiment of the present application;
FIG. 4 is another schematic flow chart diagram of an optimal regulation method according to an embodiment of the present application;
fig. 5 is a schematic diagram of an internal structure of an electronic device according to an embodiment of the present application.
Description of the drawings: 1. an electrical energy subsystem; 2. a thermal energy subsystem; 3. a load regulation subsystem; 4. an energy source side; 5. a user side; 11. a power generation device; 12. an electrical energy storage device; 13. an electric temperature adjusting device 21 and a heat energy storage device; 22. an absorption type temperature adjusting device; 23. an organic Rankine cycle device; 111. an internal combustion engine module; 112. a fuel cell module; 113. a wind photovoltaic module; 114. a renewable energy power generation module; 115. a hot-cold-electricity triple supply module; 121. an electrochemical energy storage module; 122. a flywheel energy storage module; 123. a super capacitor module; 131. an electric heat pump module; 132. an electric refrigeration module; 221. an absorption heat pump module; 222. absorption refrigeration module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clearly understood, the present application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided in the present application without any inventive step are within the scope of protection of the present application.
It is obvious that the drawings in the following description are only examples or embodiments of the present application, and that it is also possible for a person skilled in the art to apply the present application to other similar contexts on the basis of these drawings without inventive effort. Moreover, it should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of ordinary skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments without conflict.
Unless defined otherwise, technical or scientific terms referred to herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which this application belongs. Reference to "a," "an," "the," and similar words throughout this application are not to be construed as limiting in number, and may refer to the singular or the plural. The present application is directed to the use of the terms "including," "comprising," "having," and any variations thereof, which are intended to cover non-exclusive inclusions; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to the listed steps or elements, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Reference to "connected," "coupled," and the like in this application is not intended to be limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The term "plurality" as referred to herein means two or more. "and/or" describes an association relationship of associated objects, meaning that three relationships may exist, for example, "A and/or B" may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. Reference herein to the terms "first," "second," "third," and the like, are merely to distinguish similar objects and do not denote a particular ordering for the objects.
The applicant summarizes the application conditions of the existing patents and micro energy networks through system analysis, and finds that the problems of low permeability of renewable energy under all working conditions, low comprehensive energy utilization rate, poor flexibility of system adjustment and the like mainly exist in the related technologies, the requirements of users on electricity, heat and cold cannot be flexibly matched on the premise of safety and stability, strong coupling exists in thermoelectricity, heat-electrolytic coupling cannot be realized along with the requirements of users in different application scenes, and the requirements of the users can be flexibly and efficiently met.
The invention provides a system which is reasonable in design, realizes multi-dimensional active regulation and control, can utilize renewable energy to the maximum extent, provides multiple energy types of electricity, heat, cold and the like which are safe, reliable, stable and economical for different types of application scenes of industrial parks, intelligent towns, intelligent villages, schools, hospitals, data centers and the like, and meets the high-quality energy utilization requirements of users. The multidimensional active regulation and control mode for the comprehensive energy system under the first rated load (low-load working condition) and the second rated load (high-load working condition) is provided by combining the coupling integration mode of the system, so that the flexibility of operation and regulation of the system is ensured, the flexible and efficient energy utilization requirements of the system are met, the renewable energy utilization maximization of the system is realized, and the carbon emission level is reduced.
An embodiment of the present application provides an integrated energy system, and fig. 1 is a block diagram of a structure of the integrated energy system according to the embodiment of the present application, and as shown in fig. 1, the system includes an electric energy subsystem 1, a thermal energy subsystem 2, and a load regulation subsystem 3, wherein,
the power subsystem 1 includes:
the power generation device 11 is used for generating power by renewable energy and non-renewable energy and generating waste heat;
specifically, the power generation apparatus includes an internal combustion engine module 111, a fuel cell module 112, and a wind photovoltaic module 113; the internal combustion engine module 111 and the fuel cell module 112 generate electricity in a form of complementation of natural gas and biomass gas, and generate waste heat; the wind photovoltaic module 113 generates electricity by means of wind energy complementary to solar energy and generates waste heat, wherein natural gas and biomass gas are provided by the energy source side 4.
It should be noted that the adjustable power supply composed of the internal combustion engine module 111 and the fuel cell module 112 is coupled and complemented with the non-adjustable power supply of the wind power photovoltaic module 113; the coupling complementation mode can fully combine local resources and endowments to provide stable and flexibly adjusted power output, biomass gas and natural gas are coupled and complemented as fuel under the condition of utilizing wind, light and electricity resources to the maximum extent, a gas internal combustion engine and a fuel cell output stable electric load which can be accurately optimized and regulated, the characteristic of random fluctuation of wind, light and electricity is avoided, the flexible adjustment characteristic is realized, the system can be ensured to utilize renewable energy resources to the maximum extent under the whole operating condition, the utilization rate of the renewable energy resources is more than 90 percent by measuring and calculating, and the utilization rate of comprehensive energy resources is more than 90 percent.
The electric energy storage device 12 is used for storing electric energy generated by the electric energy subsystem and the heat energy subsystem so as to meet the electric load requirement of the user side 5, wherein the electric load of the user side 5 consists of a random electric load and an elastic electric load (such as a charging pile, a charging station, a V2G and the like);
specifically, the electrical energy storage device 12 includes an electrochemical energy storage module 121, a flywheel energy storage module 122, and a super capacitor module 123; the electrochemical energy storage module 121 is configured to convert electric energy into chemical energy for storage; the flywheel energy storage module 122 is used for converting electric energy into kinetic energy for storage; and the super capacitor module 123 is used for converting the electric energy into electric field energy for storage.
It should be noted that, the novel electrical energy storage device composed of the electrochemical energy storage module 121, the flywheel energy storage module 122 and the super capacitor module 123 has a fast response speed for electrical storage adjustment, realizes accurate optimized regulation and control of electrical load supply, meets the peak electrical load requirement of the user side 5, and ensures that the system is stable, flexible and efficient.
The electric temperature adjusting device 13 is used for adjusting the temperature by utilizing the electric energy in the electric energy storage device 12 so as to meet the temperature load requirement of the user side 5;
specifically, the electric temperature adjusting device 13 includes an electric heat pump module 131 and an electric refrigeration module 132; the electric heat pump module 131 is used for heating by using the electric energy in the electric energy storage device 12 to meet the heat load requirement of the user side 5; and the electric refrigerating module 132 is used for refrigerating by using the electric energy in the electric energy storage device 12 to meet the cold load requirement of the user side 5.
Preferably, according to the exhaust gas temperature (360-420 ℃) of the fuel cell and the gas internal combustion engine, the electric heat pump module 131 utilizes the electric energy in the electric energy storage device 12 and heats through lithium bromide according to the principle of 'temperature utilization to mouth and cascade utilization'; the electric refrigeration module 132 utilizes the electric energy in the electric energy storage device 12 to perform refrigeration by lithium bromide.
It should be noted that, by the electric temperature adjusting device 13 (the electric heat pump module 131 and the electric cooling module 132) in the electric energy subsystem 1, the electric load and the heat/cold load in the system are coupled, and during the peak period of the heat/cold load demand of the user side 5, the electric load is converted into the heat/cold load through the electric cooling/electric heat pump, so that the mutual conversion between different loads according to the demand is efficiently realized, the heat/cold-electrolytic coupling operation is realized, and the purpose of multidimensional active optimization regulation and control under the full working condition is met.
The thermal energy subsystem 2 comprises:
the thermal energy storage device 21 is used for storing the heat energy in the solar energy and the waste heat generated in the electric energy subsystem 1;
in particular, the thermal energy storage device 21 directly stores the thermal energy in the solar energy (renewable energy in the energy side 4), and the waste heat generated in the electrical energy subsystem 1, and further, can be used for storing the waste heat generated in the thermal energy subsystem 2.
It should be noted that, solar energy in renewable energy is fully utilized based on the thermal energy storage device 21, unlike the photovoltaic power generation module in the power generation device 11 that utilizes light energy in solar energy, the thermal energy storage device 21 utilizes heat energy in solar energy, which further improves the utilization rate of renewable energy in the system, and realizes cyclic utilization of energy inside the system by absorbing waste heat.
An absorption thermostat 22 for temperature regulation with the thermal energy in the thermal energy storage 21 to meet the temperature load demand of the user side 5;
specifically, the absorption temperature adjustment device 22 includes an absorption heat pump module 221 and an absorption refrigeration module 222; the absorption heat pump module 221 is configured to utilize the heat energy in the heat energy storage device 21 to perform heating, so as to meet the heat load requirement of the user side 5; the absorption refrigeration module 222 is configured to utilize the heat energy in the heat energy storage device 21 to perform refrigeration to meet the cooling load demand of the user side 5.
Preferably, according to the exhaust gas temperature (360-420 ℃) of the fuel cell and the gas internal combustion engine, the absorption heat pump module 221 uses the heat energy in the heat energy storage device 21 to heat through lithium bromide according to the principle of temperature utilization; the absorption refrigeration module 222 uses the thermal energy in the thermal energy storage device 21 to perform refrigeration by lithium bromide.
It should be noted that the absorption heat pump module 221 and the absorption refrigeration module 222 assist in adjusting the heat energy stored in the heat energy storage device 21, so as to implement accurate and optimized regulation of heat/cold load supply, meet the heat/cold load demand of the peak user side, and ensure that the system is stable, flexible and efficient.
And an organic rankine cycle device (ORC) 23 for generating power by using the thermal energy generated by the absorption type temperature adjustment device 22 and storing the generated electric energy in the electric energy storage device 12.
Preferably, the organic rankine cycle device 23 is further configured to directly utilize the waste heat generated by the power generation device 11 to generate power, and store the generated electric energy in the electric energy storage device 12, wherein the waste heat is generated by non-renewable energy power generation.
Further, fig. 2 is another structural block diagram of the integrated energy system according to the embodiment of the present application, and as shown in fig. 2, the modules for generating electricity in the electricity generating apparatus 11 are replaced with a renewable energy electricity generating module 114 and a combined heat and cold electricity supplying module 115 (CCHP); the heat, cold and electricity triple supply module 115 is used for providing electric energy for the electric energy storage device 12, providing heat energy for power generation of the organic rankine cycle device 23 and providing heat energy for the absorption type temperature regulation device 22.
It should be noted that the organic rankine cycle device 23 can fully recover the electric energy which is not required to be converted from the thermal load under the working condition with less thermal load requirement, and store the electric energy in the novel electric energy storage module; under the condition of a second rated load (high-load working condition), a combined cooling heating and power module 115 (non-renewable energy power generation module) is configured in a coupling mode, serves as a main module for matching the fluctuation characteristics of the electric load following the elastic electric load and the random electric load, and provides an adjustable, flexible and active regulation and control power supply; the low-grade waste heat which is not needed by the user side 5 is converted into electric energy through the organic Rankine cycle device 23 and stored in the electric energy storage system, so that the heat/cold-electrolytic coupling operation can be efficiently realized, the system is flexible to adjust, electricity, heat and cold loads can be economically and efficiently output according to a load characteristic curve, and the high-quality requirement of the user on energy can be stably, efficiently and economically met according to the load dynamic requirement change characteristic.
And the load regulation and control subsystem 3 is used for regulating and controlling load supply in real time so as to enable 100% of generated energy of renewable energy sources to be consumed.
Specifically, a first rated load (low-load condition) is set, and under the load condition, the power demand of a user side can be met by the renewable energy power generation and the non-renewable energy power generation in the power generation device;
the load regulation and control subsystem 3 regulates and controls load supply in real time:
generated energy P in renewable energy RE Electric energy demand P less than or equal to user side user < renewable energy generated Power P RE + non-renewable energy power generation amount P FER During operation, the power generation capacity of the non-renewable energy sources and the charging and discharging of the electric energy storage device 12 are adjusted through the full load operation of the renewable energy sources to meet the power demand of the user side;
on the user side, the electrical energy requirement P user < renewable energy Power Generation amount P RE In the meantime, the full load operation is generated by the renewable energy source to meet the power demand of the user side, and the additional electric energy generated by the renewable energy source power generation is stored by the electric energy storage device 12.
Specifically, a second rated load (high-load condition) at which the power generated by the renewable energy source and the power generated by the non-renewable energy source in the power generation device are insufficient to meet the power demand of the user side;
the load regulation and control subsystem regulates and controls load supply in real time:
on the user side, the electrical energy requirement P user More than or equal to the generated energy P of renewable energy sources RE + non-renewable energy power generation amount P FER In the meantime, the power demand of the user side is met through the full load operation of the renewable energy power generation and the non-renewable energy power generation, the power generation of the organic rankine cycle device 23 and the charging and discharging of the electric energy storage device 12.
It should be noted that, in the real-time regulation and control supply of the electrical load, the renewable energy power generation is full-load operation, and the electric energy generated by the power generation is almost supplied to the user side (a small part of the electric energy is stored in the electrical energy storage device 12), so that the renewable energy utilization rate in the integrated energy system is provided to the maximum extent, and meanwhile, the generated energy of the renewable energy is consumed by 100%, further, under the high-load working condition, the low-grade waste heat which is not needed by the user side is converted into the electric energy supply through the organic rankine cycle device, and the heat/cold-electrolytic coupling operation is efficiently and flexibly realized.
In addition, the real-time regulation and control of the load supply by the load regulation and control subsystem 3 not only includes the real-time regulation and control of the electrical load, but also includes the real-time regulation and control of the temperature load:
in particular, the heat/cold energy demand Q is at the user side H/C When the heating and cooling capacity of the absorption type temperature adjusting device 22 is more than or equal to the heating and cooling capacity, the cold and heat requirements of a user side are met through adjustment of the electric energy storage device 12 and the electric temperature adjusting device 13;
at the user end the heat/cold energy demand Q H/C When the heating and cooling capacity of the absorption type temperature adjusting device 22 is less than the heating and cooling capacity, the cold and heat requirements of the user side are met by adjusting the operation states of the absorption type temperature adjusting device 22 and the heat energy storage device 21.
It should be noted that the absorption type temperature adjustment device 22 is preferred to perform temperature adjustment, and if the cold and hot requirements of the user side cannot be met, the electric temperature adjustment device 13 is adopted to perform temperature adjustment, so that 100% of heat energy storage is realized.
Preferably, in order to realize the real-time regulation and control supply more efficiently, the load regulation and control subsystem 3 may predict the power generation amount of the renewable energy source, the power demand and the cold and heat demand of the user side in advance, and specifically adopts a support vector machine algorithm to predict:
actual load values for typical months are given as a training set
On a set of linear functions
In finding function
Make a loss function
A minimum is reached on the training set. The loss function is:
whereinεIn order to be an insensitive loss function,yin order to be the true load data value,f(x,a)for the user sideAnd (4) predicting the load. If the training set meets the constraint conditions, the accuracy is considered to beεFitting with a linear function without errors, i.e. if the difference between the predicted value and the true value is less thanεThe loss is considered to be zero, so the error isεThe inner point has no effect on the loss function, which ensures thatεThe solution obtained by the insensitive loss function has better sparsity.
this is the support vector estimation, i.e. support vector regression estimation, of the regression problem. By minimizing the target
Can make regression function
The flattest. For this reason, when the constraint cannot be fully satisfied, i.e., when the fitting error is allowed, a relaxation factor is introduced
And
so the optimization problem objective becomes:
。
the constraint becomes:
aiming at the nonlinear regression problem, nonlinear data can be mapped to a high-dimensional feature space through a kernel function, and linear regression is performed in the high-dimensional feature space, so that nonlinear regression estimation of the original problem is achieved. The target problem then translates into:
wherein the content of the first and second substances,
the kernel function is a currently active research field, and can accurately determine the structure of a high-dimensional space and control the complexity of a solution according to the structure. The kernel function method is to map nonlinear data to a high-dimensional space by using nonlinear transformation, then design a linear learning algorithm in the high-dimensional space, if the interaction of each coordinate component is only an inner product, the form of the nonlinear transformation does not need to be clear, and the inner product is replaced by the kernel function meeting the Mercer condition, so that the nonlinear algorithm corresponding to the original space is obtained.
6 input parameters and one output parameter are defined in the model, and the input parameters are actual load values Q at t-1 moment t-1 Actual load value Q at time t-2 t-2 Actual load value Q at time t-3 t-3 (ii) a Outdoor temperature Tt-1 at time T-1 and outdoor temperature T at time T-2 t-2 And the outdoor temperature T at time T-3 t-3 Expressed by a vector X, X = [ Q ] t-1 , Q t-2 , Q t-3 , T t-1 , T t-2 , T t-3 ]. The air conditioning load Qt at the time t as the output parameter is represented by Y.
The kernel function selected by the established SVR model is a radial basis function, and the optimal parameters are g and C. Generally, g has a large influence on the generalization performance of the SVR model, and if the value is small, the connection between the support vectors is relatively loose, the over-learning phenomenon is easily generated, and the generalization capability is relatively poor; if the value is too large, the influence among the support vectors is too strong, the model precision is deteriorated, and the under-learning phenomenon is easy to generate. The punishment factor C determines the influence degree of the empirical risk on the model, if the C is increased, the empirical risk is increased, and if the value tends to be infinite, the structure risk minimization tends to the empirical risk minimization; if C is reduced, the experience risk is reduced, and if C is too small, the established model cannot truly reflect the characteristics of the object, and the modeling significance is lost. In general, the training error decreases as C increases, so C should be minimized while ensuring a smaller training error. And obtaining the optimal parameters C and g by using a GA genetic algorithm. And calculating by taking the optimal parameters C and g as initial conditions to obtain the comparison between the prediction result of the user side load and an actual value.
The above modules may be functional modules or program modules, and may be implemented by software or hardware. For a module implemented by hardware, the above modules may be located in the same processor; or the modules can be respectively positioned in different processors in any combination.
An optimal regulation method is provided in the embodiments of the present application, the method is based on the system in the foregoing embodiments, fig. 3 is a schematic flow chart of the optimal regulation method according to the embodiments of the present application, and as shown in fig. 3, when the system operates at a first rated load (low load condition), the method includes the following steps:
the power generation device 11 generates power by renewable energy and generates waste heat, the electric energy generated by the power generation is stored in the electric energy storage device 12, and the waste heat is stored in the heat energy storage device 21 together with the heat energy in the solar energy;
the electrical energy storage means 12 provides electrical energy to meet the electrical load demand on the user side;
the electric temperature adjusting device 13 adjusts the temperature by using the electric energy in the electric energy storage device 12 to meet the temperature load (heat/cold load) requirement of the user side;
the absorption thermostat 22 utilizes the thermal energy in the thermal energy store 21 for temperature regulation in order to meet the temperature load (heat/cold load) requirements on the user side.
Through the method steps in the embodiment, the renewable energy is completely used through system coupling matching, the requirements of electricity, heat and cold loads in different application scenes are met under the condition that the renewable energy is 100% consumed (low-load condition), flexible and efficient active regulation and control can be performed according to requirements, the economic benefit maximization is realized on the premise that the system is safe and reliable, and the zero-carbon emission target is achieved.
In some embodiments, fig. 4 is another schematic flow chart of an optimal regulation method according to an embodiment of the present application, and as shown in fig. 4, when the system operates at the second rated load (high load condition), the method includes the following steps:
the power generation device 11 generates power by renewable energy and generates waste heat, the electric energy generated by power generation is stored in the electric energy storage device 12, and the waste heat and the heat energy in the solar energy are stored in the heat energy storage device 21;
the power generation device 11 generates power through non-renewable energy sources and generates waste heat, the electric energy generated by the power generation is stored in the electric energy storage device 12, the waste heat is directly used for power generation by the organic Rankine cycle device 23, and the generated electric energy is stored in the electric energy storage device 12;
optionally, a module for non-renewable energy power generation in the power generation device 11 is replaced by a combined heat and cold power module 115 (CCHP); the heat, cold and electricity triple supply module 115 is used for providing electric energy for the electric energy storage device 12, providing heat energy for the power generation of the organic Rankine cycle device 23 and providing heat energy for the absorption type temperature regulating device 22; under the condition of a second rated load (high-load working condition), a combined cooling heating and power module (CCHP) is configured in a coupling mode, and the combined cooling heating and power module serves as a main module which is matched with the fluctuation characteristics of the electric load following the elastic electric load and the random electric load and provides an adjustable, flexible and active regulation and control power supply.
The electrical energy storage device 12 provides electrical energy to meet the electrical load requirements at the customer side;
the electric temperature adjusting device 13 adjusts the temperature by using the electric energy in the electric energy storage device 12 so as to meet the temperature load requirement of the user side;
the absorption thermostat 22 utilizes the thermal energy in the thermal energy store 21 for temperature regulation to meet the temperature load demand on the user side.
By the method steps in the embodiment of the application, the coupling complementation of natural gas fossil fuel and biomass renewable energy is realized, a stable and reliable adjustable power supply is provided by a gas internal combustion engine and a fuel cell system and is coupled with a wind-solar-electricity and other non-adjustable power supplies, the local resource endowment can be fully combined, the stable and flexible adjustment power supply output is provided, the random fluctuation characteristic of wind, light and electricity is avoided under the condition of utilizing the wind, light and electricity resources to the maximum extent, the flexible adjustment characteristic is realized, the system can utilize the renewable energy to the maximum extent under the full working condition, the utilization rate of the renewable energy is more than 90% by measuring and calculating, and the comprehensive energy utilization rate is more than 90%.
Further, by the embodiment corresponding to fig. 3 and fig. 4, the operation of the thermal-electrolytic coupling under the full-load working condition (0-100%) is realized, and simultaneously, the goals of efficient thermal-electric cooperation, interconversion, stability, economy and reliability in operation can be realized. The system can meet the diversified energy utilization requirements of different application scenes such as data centers, schools, hospitals, pharmaceutical companies, office buildings, intelligent towns and the like.
It should be noted that the steps illustrated in the above-described flow diagrams or in the flow diagrams of the figures may be performed in a computer system, such as a set of computer-executable instructions, and that, although a logical order is illustrated in the flow diagrams, in some cases, the steps illustrated or described may be performed in an order different than here.
The present embodiment also provides an electronic device, comprising a memory having a computer program stored therein and a processor configured to run the computer program to perform the steps of any of the method embodiments described above.
Optionally, the electronic apparatus may further include a transmission device and an input/output device, wherein the transmission device is connected to the processor, and the input/output device is connected to the processor.
It should be noted that, for specific examples in this embodiment, reference may be made to examples described in the foregoing embodiments and optional implementations, and details of this embodiment are not described herein again.
In addition, by combining the optimization regulation method in the above embodiments, the embodiments of the present application can provide a storage medium to implement. The storage medium has a computer program stored thereon; the computer program, when executed by a processor, implements any of the above-described optimized regulation methods.
In one embodiment, a computer device is provided, which may be a terminal. The computer device comprises a processor, a memory, a network interface, a display screen and an input device which are connected through a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operating system and the computer program to run on the non-volatile storage medium. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement an optimal regulation method. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.
In an embodiment, fig. 5 is a schematic diagram of an internal structure of an electronic device according to an embodiment of the present application, and as shown in fig. 5, there is provided an electronic device, which may be a server, and an internal structure diagram of which may be as shown in fig. 5. The electronic device includes a processor, a network interface, an internal memory, and a non-volatile memory, which stores an operating system, a computer program, and a database, connected by an internal bus. The processor is used for providing calculation and control capability, the network interface is used for communicating with an external terminal through network connection, the internal memory is used for providing an environment for an operating system and the running of a computer program, the computer program is executed by the processor to realize an optimal regulation and control method, and the database is used for storing data.
Those skilled in the art will appreciate that the configuration shown in fig. 5 is a block diagram of only a portion of the configuration associated with the present application, and does not constitute a limitation on the electronic device to which the present application is applied, and a particular electronic device may include more or less components than those shown in the drawings, or may combine certain components, or have a different arrangement of components.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above may be implemented by hardware instructions of a computer program, which may be stored in a non-volatile computer-readable storage medium, and when executed, the computer program may include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), rambus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
It should be understood by those skilled in the art that various technical features of the above-described embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described, however, so long as there is no contradiction between the combinations of the technical features, they should be considered as being within the scope of the present description.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An integrated energy system, comprising an electrical energy subsystem, a thermal energy subsystem, and a load regulation subsystem, wherein the electrical energy subsystem comprises:
the power generation device is used for generating power by renewable energy and non-renewable energy and generating waste heat;
the electric energy storage device is used for storing electric energy generated by the electric energy subsystem and the heat energy subsystem so as to meet the electric load requirement of a user side;
the electric temperature adjusting device is used for adjusting the temperature by utilizing the electric energy in the electric energy storage device so as to meet the temperature load requirement of a user side;
the thermal energy subsystem includes:
the heat energy storage device is used for storing heat energy in the solar energy and waste heat generated in the electric energy subsystem;
the absorption type temperature adjusting device is used for adjusting the temperature by utilizing the heat energy in the heat energy storage device so as to meet the temperature load requirement of a user side;
the organic Rankine cycle device is used for generating power by utilizing the heat energy generated by the absorption type temperature regulating device and storing the generated electric energy into the electric energy storage device;
and the load regulation and control subsystem is used for regulating and controlling load supply in real time so as to enable 100% of generated energy of renewable energy sources to be consumed.
2. The system of claim 1, wherein the orc device is further configured to generate electricity by directly utilizing waste heat generated by the power generation device, and store the generated electrical energy in the electrical energy storage device, wherein the waste heat is generated by non-renewable energy power generation.
3. The system of claim 1, wherein the load regulation subsystem regulates the load supply in real time such that 100% of the power generation from the renewable energy source is consumed comprises:
when the comprehensive energy system operates under a first rated load, the load regulation and control subsystem regulates and controls load supply in real time, so that renewable energy sources in the power generation device run at full load in power generation, non-renewable energy sources in the power generation device generate power, and the electric energy storage device is charged and discharged, and the generated energy of the renewable energy sources is 100% consumed to meet the power demand of a user side;
when the integrated energy system operates under a second rated load, the load regulation and control subsystem regulates and controls load supply in real time, and the renewable energy sources in the power generation device are used for generating power to run at full load, generating power by the non-renewable energy sources in the power generation device, generating power by the organic Rankine cycle device and charging and discharging the electric energy storage device, so that the generated energy of the renewable energy sources is 100% consumed to meet the power demand of a user side.
4. The system of claim 3, wherein the load regulation subsystem regulates load supply in real time when the integrated energy system is operating at a first rated load comprising:
the load regulation and control subsystem regulates and controls load supply in real time:
generated energy P in renewable energy RE Electric energy demand P less than or equal to user side user < renewable energy Power Generation amount P RE + non-renewable energy power generation capacity P FER When the system is in use, the power generation capacity of the non-renewable energy sources and the charging and discharging of the electric energy storage device are adjusted through the full-load operation of the renewable energy sources to meet the power demand of a user side;
on the user side, the power demand P user < renewable energy generated Power P RE In time, the full-load operation is generated by the renewable energy sources to meet the power demand of the user side, and the system is connectedAnd the electric energy storage device stores the additional electric energy generated by the renewable energy source power generation.
5. The system of claim 3, wherein the load regulation subsystem regulates load supply in real time when the integrated energy system is operating at a second rated load comprising:
the load regulation and control subsystem regulates and controls load supply in real time:
on the user side, the power demand P user More than or equal to the generating capacity P of renewable energy resources RE + non-renewable energy power generation capacity P FER And in the process, the power demand of a user side is met through full-load operation of renewable energy power generation and non-renewable energy power generation, power generation of the organic Rankine cycle device and charging and discharging of the electric energy storage device.
6. The system of claim 1, wherein the power generation device comprises an internal combustion engine module, a fuel cell module, and a wind photovoltaic module;
the internal combustion engine module and the fuel cell module are used for generating electricity in a form of complementation of natural gas and biomass gas and generating waste heat;
the wind power photovoltaic module is used for generating power in a form of complementation of wind energy and solar energy and generating waste heat.
7. The system of claim 1, wherein the electrical energy storage device comprises an electrochemical energy storage module, a flywheel energy storage module, and a supercapacitor module;
the electrochemical energy storage module is used for converting electric energy into chemical energy for storage;
the flywheel energy storage module is used for converting electric energy into kinetic energy to be stored;
and the super capacitor module is used for converting the electric energy into the electric field energy for storage.
8. The system of claim 1, wherein the electrical temperature regulation device comprises an electric heat pump module and an electric refrigeration module;
the electric heating pump module is used for heating by using the electric energy in the electric energy storage device to meet the heat load requirement of a user side;
and the electric refrigeration module is used for refrigerating by using the electric energy in the electric energy storage device to meet the cold load requirement of a user side.
9. The system of claim 1, wherein the absorption attemperating device comprises an absorption heat pump module and an absorption refrigeration module;
the absorption heat pump module is used for heating by utilizing the heat energy in the heat energy storage device so as to meet the heat load requirement of a user side;
and the absorption refrigeration module is used for refrigerating by utilizing the heat energy in the heat energy storage device to meet the cold load requirement of a user side.
10. An optimal regulation method, wherein the method is based on the system of any one of claims 1 to 8, the method comprising:
the load supply is regulated and controlled in real time through the load regulation and control subsystem, so that the renewable energy source in the power generation device runs at full load in power generation, the non-renewable energy source power generation amount in the power generation device and the power generation amount of the organic Rankine cycle device are regulated, and the charging and discharging of the electric energy storage device are carried out, so that the power generation amount of the renewable energy source is 100% consumed to meet the power demand of a user side;
the load supply is regulated and controlled in real time through the load regulation and control subsystem, the temperature is regulated by utilizing the heat energy in the heat energy storage device through the absorption type temperature regulation device preferentially, and then the temperature is regulated by utilizing the electric energy in the electric energy storage device through the electric temperature regulation device so as to meet the temperature load requirement of a user side.
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