CN115911466A

CN115911466A - Fuel cell micro-grid energy supply system and dynamic scheduling method thereof

Info

Publication number: CN115911466A
Application number: CN202310064416.9A
Authority: CN
Inventors: 潘凤文; 王彦波; 李明阳; 吕小峰; 何良建; 杨锋; 孙奎崧
Original assignee: Shandong Guochuang Fuel Cell Technology Innovation Center Co ltd
Current assignee: Shandong Guochuang Fuel Cell Technology Innovation Center Co ltd
Priority date: 2023-02-06
Filing date: 2023-02-06
Publication date: 2023-04-04
Anticipated expiration: 2043-02-06
Also published as: CN115911466B

Abstract

The invention discloses a fuel cell micro-grid energy supply system and a dynamic scheduling method thereof, wherein the fuel cell micro-grid energy supply system comprises an electric energy type electric pile module and a heat energy type electric pile module; the dynamic scheduling method of the fuel cell microgrid energy supply system comprises the following steps: determining the working mode of the fuel cell microgrid energy supply system according to the demand ratio of the electricity power consumption and the heat power consumption of the current user; the working modes of the fuel cell microgrid energy supply system comprise an electric mode and a thermal mode; and dynamically allocating the energy output of the electric energy type electric pile module and the heat energy type electric pile module according to the working mode of the fuel cell micro-grid energy supply system. The allocation of the operation condition of the adaptive user is realized, different power and heating power demand ratios are met, the comfort level of the user is improved, and the economical and stable operation of an energy supply system is realized.

Description

Fuel cell micro-grid energy supply system and dynamic scheduling method thereof

Technical Field

The embodiment of the invention relates to the technical field of power supply, in particular to a fuel cell micro-grid energy supply system and a dynamic scheduling method thereof.

Background

The product is water in the use process of hydrogen energy, and has the characteristics of zero pollution, high efficiency and the like; the hydrogen energy is utilized to the distributed combined heat and power system, and the requirements of safety, economy, cleanness and peak regulation of the power generation system can be met.

However, the existing cogeneration system has the problem of unbalance distribution ratio of power consumption and heat, specifically, along with changes of life or working rules of users, weather changes, season changes, operation and outage of large-scale equipment and the like, the demand proportion of the users to power and heat is different in different states, and the galvanic pile in the existing cogeneration system is the galvanic pile with the same power generation efficiency and heating efficiency, so that different demand proportions of power and heat cannot be met; the imbalance of the distribution has great influence on the supply and demand of the electric power and the comfort of users. At present, the strategy of efficiency optimization is mainly applied to the fuel cell and lithium battery hybrid mode automobile, and the optimization problem is solved by adopting an optimization control method generally, although the industry is mature, the models for the automobile cannot be directly applied to the home furnishing or park application of the fuel cell and the hybrid system thereof, and a combined heat and power system and a scheduling mode thereof aiming at the home furnishing application scene need to be developed urgently.

Disclosure of Invention

The embodiment of the invention provides a fuel cell micro-grid energy supply system and a dynamic scheduling method thereof, which are used for realizing the allocation of operation conditions of users, meeting different power and heat demand proportions, improving the comfort level of the users and realizing the economical and stable operation of the energy supply system.

According to an aspect of the invention, a dynamic scheduling method for a fuel cell microgrid power supply system is provided, wherein the fuel cell microgrid power supply system comprises an electric energy type electric pile module and a thermal energy type electric pile module; the power generation efficiency of the galvanic pile in the electric energy type galvanic pile module is greater than that of the galvanic pile in the heat energy type galvanic pile module, and the heat generation efficiency of the galvanic pile in the heat energy type galvanic pile module is greater than that of the galvanic pile in the electric energy type galvanic pile module; the dynamic scheduling method of the fuel cell microgrid energy supply system comprises the following steps:

determining the working mode of the fuel cell micro-grid energy supply system according to the demand ratio of the electricity power consumption to the heat power consumption of the current user; the working modes of the fuel cell microgrid energy supply system comprise an electric mode and a thermal mode;

and dynamically allocating the energy output of the electric energy type electric pile module and the heat energy type electric pile module according to the working mode of the fuel cell micro-grid energy supply system.

Optionally, the determining, according to a demand ratio of the current electric power consumption to the current thermal power consumption of the user, an operation mode of the fuel cell microgrid power supply system includes:

if the demand ratio of the electricity power consumption and the heat power consumption of the current user is larger than a preset value, determining that the working mode of the fuel cell microgrid energy supply system is an electric mode mainly based on high-potential output;

and if the current demand ratio of the electric power consumption and the thermal power consumption of the user is smaller than a preset value, determining that the working mode of the fuel cell microgrid energy supply system is a thermal mode mainly based on low-potential output.

if the current demand ratio of the electric power consumption and the thermal power consumption of the user is larger than or equal to the ratio of the electricity generation efficiency and the heat generation efficiency of the fuel cell microgrid energy supply system, determining that the working mode of the fuel cell microgrid energy supply system is an electric mode mainly based on high-potential output;

if the demand ratio of the electricity power and the heat power of the current user is smaller than the ratio of the electricity generation efficiency and the heat generation efficiency of the fuel cell microgrid energy supply system, determining that the working mode of the fuel cell microgrid energy supply system is a thermal mode mainly based on low-potential output;

wherein, different power generation corresponds to different power generation efficiency to and different heat generation efficiency.

Optionally, the electric energy type galvanic pile module comprises a plurality of first electric energy type galvanic piles and a plurality of second electric energy type galvanic piles; the heat energy type electric pile module comprises a plurality of first heat energy type electric piles and a plurality of second heat energy type electric piles; the electric pile in the electric energy type electric pile module and the electric pile in the heat energy type electric pile module are provided with a high-efficiency power generation area and a high-efficiency heat generation area; the voltage output by the electric pile in the power generation high-efficiency area is higher than the voltage output by the heat generation high-efficiency area, and the current density j output by the electric pile in the power generation high-efficiency area is less than the current density j output by the heat generation high-efficiency area; such that the power generated by the stack in the power generation efficient zone is higher than the power generated in the heat generation efficient zone, and the heating power of the stack in the power generation efficient zone is lower than the heating power in the heat generation efficient zone;

in the electric mode, dynamically allocating the energy output of the electric energy type electric pile module and the thermal energy type electric pile module comprises:

controlling the first electric energy type stack to output a fixed generated power in a power generation efficient region;

controlling the first thermal energy type electric pile and the second thermal energy type electric pile to not work or to output the fixed generated power in the high-efficiency power generation area;

controlling the second electric energy type electric pile to dynamically compensate the target difference of the electric energy requirement;

under the thermal mode, dynamic scheduling the energy output of electric energy type galvanic pile module and thermal energy type galvanic pile module includes:

controlling the first thermal type stack to output at a fixed heating power in a heating efficient region;

controlling the first electric energy type electric pile and the second electric energy type electric pile to be out of operation or outputting the electric energy at fixed heating power in a heating high-efficiency area;

and controlling the second thermal energy type electric pile to dynamically compensate the target difference of the thermal energy demand.

Optionally, the electric energy type stack module further includes at least one third electric energy type stack, where the third electric energy type stack is used as an alternate shutdown stack of the first electric energy type stack; the dynamic scheduling method of the fuel cell microgrid energy supply system further comprises the following steps:

controlling the working state of the first electric energy type electric pile and the working state of the third electric energy type electric pile according to a preset start-stop period; wherein the total number of the first power type cell stack and the third power type cell stack which are simultaneously started is kept unchanged;

or the third electric energy type electric pile is used as a fault standby electric pile of the first electric energy type electric pile; the dynamic scheduling method of the fuel cell microgrid energy supply system further comprises the following steps:

when a first electric energy type electric pile with a fault appears in a plurality of first electric energy type electric piles, controlling and starting third electric energy type electric piles with the same number as the first electric energy type electric piles with the fault to replace the first electric energy type electric piles with the fault to continue working;

the heat energy type electric pile module also comprises at least one third heat energy type electric pile, and the third heat energy type electric pile is used as an alternate shutdown electric pile of the first heat energy type electric pile; the dynamic scheduling method of the fuel cell microgrid energy supply system further comprises the following steps:

controlling the working state of the first thermal energy type galvanic pile and the working state of the third thermal energy type galvanic pile according to a preset start-stop period; wherein the total number of the first thermal type cell stack and the third thermal type cell stack which are simultaneously started up is kept unchanged;

or the third thermal energy type electric pile is used as a fault standby electric pile of the first thermal energy type electric pile; the dynamic scheduling method of the fuel cell microgrid energy supply system further comprises the following steps:

and when a first failed thermal type electric pile exists in the plurality of first thermal type electric piles, controlling and starting the third thermal type electric piles, the number of which is the same as that of the first failed thermal type electric piles, so as to replace the first failed thermal type electric pile to continue working.

Optionally, before controlling the second electric energy type stack to dynamically compensate for the electric energy requirement, the method further includes:

judging whether the required change amount of the generated power in a preset time meets the integral multiple of the generated power of one first electric energy type electric pile, and the first electric energy type electric piles with corresponding adjustable quantity are provided; if so, controlling to shut down or start up a corresponding number of first electric energy type electric piles;

or, judging whether the required change amount of the generated power in a preset time meets the integral multiple of the generated power of one first heat energy type electric pile, and the required change amount has the corresponding adjustable quantity of the first heat energy type electric piles; and if so, controlling to shut down or start up the first heat energy type electric piles in corresponding quantity.

Optionally, before controlling the second electric energy type stack to dynamically compensate for the heat energy requirement, the method further includes:

judging whether the required change amount of the heating power in a preset time meets integral multiple of the heating power of one first heat energy type electric pile, and the first heat energy type electric piles with corresponding adjustable quantity are provided; if so, controlling to shut down or start up a corresponding number of first heat energy type electric piles;

or, judging whether the required change amount of the heating power in a preset time meets integral multiple of the heating power of one first electric energy type electric pile, and having a corresponding adjustable number of first electric energy type electric piles; and if so, controlling to shut down or start up the first electric energy type electric piles in corresponding quantity.

Optionally, in the electricity mode, the fixed generated power of the first electric energy type stack is the generated power with the highest use frequency determined based on the historical electricity consumption data of the user, or is the corresponding generated power when the electricity consumption determined based on the historical electricity consumption data of the user is the minimum;

in the thermal mode, the fixed heating power of the first thermal energy type electric pile is the heating power with the highest use frequency determined based on the historical heat data of the user, or the corresponding heating power when the heat consumption determined based on the historical heat data of the user is the minimum.

According to another aspect of the invention, a fuel cell microgrid energy supply system is provided, which comprises an electric energy type electric pile module and a thermal energy type electric pile module; the electricity generating efficiency of the galvanic pile in the electric energy type galvanic pile module is greater than that of the galvanic pile in the heat energy type galvanic pile module, and the heat generating efficiency of the galvanic pile in the heat energy type galvanic pile module is greater than that of the galvanic pile in the electric energy type galvanic pile module;

the working modes of the fuel cell microgrid energy supply system comprise an electric mode and a thermal mode; in the electric mode, dynamically allocating the energy output of the electric energy type electric pile module and the heat energy type electric pile module to mainly supply power; and under the thermal mode, dynamically allocating the energy output of the electric energy type electric pile module and the thermal energy type electric pile module to mainly supply heat.

Optionally, the electric energy type electric pile module comprises a plurality of first electric energy type electric piles and a plurality of second electric energy type electric piles; the heat energy type electric pile module comprises a plurality of first heat energy type electric piles and a plurality of second heat energy type electric piles; the electric pile in the electric energy type electric pile module and the electric pile in the heat energy type electric pile module are provided with a power generation high-efficiency area and a heat generation high-efficiency area; the voltage output by the electric pile in the power generation high-efficiency area is higher than the voltage output by the heat generation high-efficiency area, and the current density j output by the electric pile in the power generation high-efficiency area is less than the current density j output by the heat generation high-efficiency area; such that the power generated by the stack in the power generation efficient zone is higher than the power generated in the heat generation efficient zone, and the heating power of the stack in the power generation efficient zone is lower than the heating power in the heat generation efficient zone;

in the electric mode, the first electric energy type pile is used for outputting fixed generating power in a generating high-efficiency area; the first thermal type electric pile and the second thermal type electric pile do not work, or output with the fixed generated power in the high-efficiency power generation area; the second electric energy type electric pile is used for dynamically compensating a target difference value of electric energy requirements;

in the thermal mode, the first thermal energy type electric pile is used for outputting heating power fixed in the heating high-efficiency area; the first electric energy type electric pile and the second electric energy type electric pile do not work, or are output by fixed heating power in a heating high-efficiency area; the second thermal energy type electric pile is used for dynamically compensating the target difference of the thermal energy demand.

According to the technical scheme provided by the embodiment of the invention, in order to design capacity requirements on heat energy and electric energy in a matching process, a comprehensive power supply system with an electric energy type electric pile module and a heat energy type electric pile module is arranged, and the comprehensive power supply system respectively meets the electricity utilization requirement mainly based on electric energy and the heat utilization requirement mainly based on heat energy; in the process of dynamically scheduling the comprehensive power supply system, determining whether the current working mode of the fuel cell micro-grid energy supply system is suitable for an electric mode mainly based on power supply or a thermal mode mainly based on heat supply according to the demand ratio of the power consumption power and the heat consumption power of the current user; and according to the working mode of the fuel cell microgrid energy supply system, a corresponding configuration strategy and method are adopted, the optimization of the power supply mode or the heat supply mode of the system is ensured, the comfort level of a user is improved, and the economical and stable operation of the energy supply system is realized.

It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present invention, nor do they necessarily limit the scope of the invention. Other features of the present invention will become apparent from the following description.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a flowchart of a dynamic scheduling method of a fuel cell microgrid power supply system according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a fuel cell microgrid power supply system according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of polarization curves of the performance of an electric energy type stack and a thermal energy type stack provided by an embodiment of the invention;

fig. 4 is a flowchart of another dynamic scheduling method for a fuel cell microgrid power supply system according to an embodiment of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The embodiment of the invention provides a dynamic scheduling method of a fuel cell microgrid energy supply system, fig. 1 is a flow chart of the dynamic scheduling method of the fuel cell microgrid energy supply system provided by the embodiment of the invention, and referring to fig. 1, the dynamic scheduling method of the fuel cell microgrid energy supply system comprises the following steps:

s110, determining the working mode of the fuel cell microgrid energy supply system according to the demand ratio of the electricity power and the heat power of the current user; the operating modes of the fuel cell microgrid energy supply system comprise an electric mode and a thermal mode.

Specifically, fig. 2 is a schematic structural diagram of a fuel cell microgrid power supply system according to an embodiment of the present invention, and referring to fig. 2, in order to meet a capacity requirement for thermal energy and electric energy, the fuel cell microgrid power supply system according to an embodiment of the present invention includes an electric energy type stack module 11 and a thermal energy type stack module 12. The fuel cell stack module 10 in the system is composed of the electric energy type stack module 11 and the thermal energy type stack module 12, wherein the stack in the electric energy type stack module 11 and the stack in the thermal energy type stack module 12 are both fuel cells. The fuel cell microgrid power supply system further comprises a power conversion device 20, and electricity generated by the fuel cell stack module 10 is transmitted to the electricity and heat utilization unit 30 through the power conversion device 20. The fuel cell microgrid power supply system further comprises a heat exchange and dissipation device 40, and heat generated by the fuel cell stack module 10 is transmitted to the power utilization and heat utilization unit 30 through the heat exchange and dissipation device 40.

Fig. 3 is a schematic diagram of performance polarization curves of an electric energy type stack and a thermal energy type stack according to an embodiment of the present invention, and referring to fig. 3, a performance polarization curve of a stack in an electric energy type stack module 11 using a membrane electrode with high power generation performance is shown as a curve L1 in fig. 3. The power generation efficiency of the cell stack in the thermal cell stack module 12 is lower than that of the cell stack in the electrical cell stack module 11, the membrane electrode used by the cell stack is a lower-cost membrane electrode, and the performance polarization curve of the cell stack is shown as a curve L2 in fig. 3. That is, the power generation efficiency of the thermopile in the electric energy type thermopile module 11 is greater than the power generation efficiency of the thermopile in the thermal energy type thermopile module 12, and the heat generation efficiency of the thermopile in the thermal energy type thermopile module 12 is greater than the heat generation efficiency of the thermopile in the electric energy type thermopile module 11. Also, each type of stack has a power generation high-efficiency region a and a heat generation high-efficiency region B. For the same type of electric pile, the voltage output in the power generation high-efficiency area A is higher than the voltage output in the heat generation high-efficiency area B; the current density j output in the power generation high-efficiency area A is less than that output in the heat generation high-efficiency area B.

Referring to fig. 2, the electricity and heat utilization unit 30 is generally an office building, a residential area, an industrial factory, etc., and there are regular and fluctuating power demand changes and heat demand changes. The fuel cell can provide heat while meeting the power consumption requirement, and meets the heat requirement of a user. The fuel cell power generation process needs cooling liquid to take out the heat in the cell to maintain the stability of the internal temperature of the cell, and the taken-out heat can be transmitted to the power and heat utilization unit 30 by the heat exchanger 42, so that a user can use domestic warm water or produce warm water to meet the heat demand of the user. The excess heat may be dissipated by a heat sink 41. For the same type of electric pile, the voltage output in the power generation high-efficiency area A is higher than the voltage output in the heat generation high-efficiency area B; the current density j output in the power generation high-efficiency area A is less than the current density j output in the heat generation high-efficiency area B, so that the power generation power of the galvanic pile in the power generation high-efficiency area is higher than the power generation power in the heat generation high-efficiency area, and the heating power of the galvanic pile in the power generation high-efficiency area is lower than the heating power in the heat generation high-efficiency area.

And in the working process of the fuel cell micro-grid energy supply system, the working mode of the fuel cell micro-grid energy supply system is determined according to the demand ratio of the electricity power and the heat power of the current user. The operating modes of the fuel cell microgrid energy supply system comprise an electric mode and a thermal mode. When the electricity demand is large, the fuel cell microgrid energy supply system works in an electric mode. When the heat demand is large, the fuel cell micro-grid energy supply system works in a thermal mode. The demand ratio of the power consumption power and the heat consumption power in different time periods can be determined through model self-learning according to historical power consumption heat data of a user, such as power consumption heat data of a year or power consumption heat data of several months. Therefore, the demand ratio of the power and the heat in different states can be determined based on the changes of life or work rules, weather changes, season changes, operation and outage of large equipment and the like of users. Before electric quantity and heat dispatching, the demand ratio of the electric power consumption and the heat power consumption of the current user can be determined according to the current time period.

Optionally, determining an operating mode of the fuel cell microgrid energy supply system according to a demand ratio of the current user's electric power consumption to thermal power consumption, including:

if the demand ratio of the electricity power and the heat power of the current user is larger than a preset value, determining that the working mode of the fuel cell micro-grid energy supply system is an electric mode mainly based on high-potential output;

In particular, when the demand for electric energy is predominant, i.e.

(ii) a When the thermal energy demand is dominant, i.e.

. Wherein it is present>

Represents the power consumption required by the current user, <' > or>

R is a preset value set according to the requirement, and can be any value such as 1, 2, 2.5, 3 and the like. The working mode of the fuel cell microgrid energy supply system is determined directly according to the relation between the current power consumption of a user and the heat power consumption, and the judgment modes of the electric mode and the thermal mode can be simplified.

Optionally, the determining, according to a demand ratio of the current power consumption to the current thermal power consumption of the user, an operating mode of the fuel cell microgrid power supply system includes:

if the demand ratio of the electricity power and the heat power of the current user is larger than or equal to the ratio of the electricity generation efficiency and the heat generation efficiency of the fuel cell micro-grid energy supply system, determining that the working mode of the fuel cell micro-grid energy supply system is an electric mode mainly based on high-potential output;

and if the current demand ratio of the electricity power and the heat power of the user is smaller than the ratio of the electricity generation efficiency and the heat generation efficiency of the fuel cell microgrid energy supply system, determining that the working mode of the fuel cell microgrid energy supply system is a thermal mode mainly based on low-potential output.

In particular, when the demand for electric energy is predominant, i.e.

(ii) a When the need for thermal energy is predominant, i.e. </or>

. Wherein it is present>

Represents the power consumption required by the current user, <' > or>

The heating power required by the current user; />

The electricity generation efficiency of the micro-grid energy supply system for the fuel cell is judged and judged>

And the electricity generation efficiency of the energy supply system for the fuel cell micro-grid is improved. Wherein, different power generation corresponds to different power generation efficiency to and different heat generation efficiency. The same electricity generation power of the fuel cells of the same type can correspond to the same electricity generation efficiency and can also correspond to different electricity generation efficiencies; and the same heat generating power of the same type of fuel cell may correspond to the same heat generating efficiency or may correspond to different heat generating efficiencies. Here>

The total electric power output by the fuel cell microgrid energy supply system can be understood as ^ or ^>

Corresponding to a combined power generation efficiency, here->

It can be understood that the total thermal power that is output by the fuel cell microgrid power supply system is->

Comprehensive product of hour correspondenceAnd (4) thermal efficiency.

In the day, the power consumption required in the morning is 600kW, and the heat consumption power is 300kW; the electricity generation efficiency of the corresponding fuel cell micro-grid energy supply system is 60%, and the heat generation efficiency is 40%; then

And determining that the working mode of the fuel cell microgrid energy supply system is an electric mode mainly based on high-potential output. The inventor researches and finds that the working mode determined by comparing the ratio of the demand of the electric power and the thermal power with the ratio of the power generation efficiency and the heat generation efficiency can better meet the actual energy dispatching demand.

And S120, dynamically allocating energy output of the electric energy type electric pile module and the heat energy type electric pile module according to the working mode of the fuel cell micro-grid energy supply system.

Specifically, when the power demand of the current user is greater than the thermal power demand, the electric quantity and heat output of the electric energy type stack module 11 and the electric quantity and heat output of the thermal energy type stack module 12 can be allocated according to the control strategy in the electric mode. When the power demand of the current user is smaller than the heat demand, the electric quantity and heat output of the electric energy type electric pile module 11 and the electric quantity and heat output of the heat energy type electric pile module 12 can be allocated according to the control strategy under the heat mode.

Or when the required ratio of the power consumption power to the heat consumption power of the current user is greater than or equal to the ratio of the power generation efficiency to the heat generation efficiency of the fuel cell microgrid energy supply system, the electric quantity and heat output of the electric energy type electric pile module 11 and the electric quantity and heat output of the heat energy type electric pile module 12 can be allocated according to a control strategy in an electric mode. When the demand ratio of the power consumption power and the heat consumption power of the current user is smaller than the power generation efficiency and the heat generation efficiency ratio of the fuel cell micro-grid energy supply system, the electric quantity and heat output of the electric energy type electric pile module 11 and the electric quantity and heat output of the heat energy type electric pile module 12 can be allocated according to the control strategy under the heat mode.

In the electric mode, the electric pile in the electric energy type electric pile module 11 is controlled to mainly output electric energy at high potential; the control of the electric pile in the thermal energy type electric pile module 12 mainly takes high-potential output electric energy as main power or does not work. In the thermal mode, the galvanic pile in the thermal energy type galvanic pile module 12 is controlled to mainly output electric energy at a low potential; the electric pile in the electric energy control type electric pile module 11 mainly outputs electric energy at low potential or does not work. When the electric energy is output at a low potential, the heat generation amount is large.

According to the dynamic scheduling method of the fuel cell micro-grid energy supply system, provided by the embodiment of the invention, whether the current working mode of the fuel cell micro-grid energy supply system is suitable for an electric mode mainly based on power supply or a thermal mode mainly based on heat supply is determined according to the demand ratio of the power consumption power and the heat consumption power of the current user; and adopting a corresponding configuration strategy and a corresponding configuration method according to the working mode of the fuel cell microgrid energy supply system. The technical scheme provided by the embodiment of the invention combines the thermoelectric output characteristic of the fuel cell, fully analyzes the data of the power consumption heat, forms a dispatching control strategy and a control operation method which are adaptive to the operation condition of a user through model self-learning, ensures the optimization of the power supply mode or the heat supply mode of the system through the strategy and the method of the optimal configuration, and realizes the economic and stable operation of the fuel cell cogeneration system.

Alternatively, referring to fig. 2 and 3, the electric energy type cell stack module 11 includes a plurality of first electric energy type cell stacks and a plurality of second electric energy type cell stacks; the thermal energy type cell stack module 12 includes a plurality of first thermal energy type cell stacks and a plurality of second thermal energy type cell stacks. Also, the cell stack in the electric energy type cell stack module 11 and the cell stack in the thermal energy type cell stack module 12 each have a power generation high-efficiency region a and a heat generation high-efficiency region B. The voltage output in the power generation high-efficiency area A is higher than the voltage output in the heat generation high-efficiency area B; the current density j output in the power generation high-efficiency area A is less than that output in the heat generation high-efficiency area B. That is, the power generated by the same stack in the power generation high-efficiency region a is higher than the power generated by the same stack in the heat generation high-efficiency region B, and the heat generation power of the stack in the power generation high-efficiency region a is lower than the heat generation power in the heat generation high-efficiency region B.

In the electric mode, the first electric energy type electric pile is used for outputting with fixed generated power in the power generation high-efficiency area; the first thermal energy type electric pile and the second thermal energy type electric pile do not work, or output with the fixed generating power in the generating high-efficiency area; the second power type stack is used to dynamically compensate for power requirements.

In the heat mode, the first heat energy type electric pile is used for outputting fixed heating power in the heating high-efficiency area; the first electric energy type electric pile and the second electric energy type electric pile do not work, or are output with fixed heating power in the heating high-efficiency area; the second thermal type stack is used to dynamically compensate for thermal energy requirements.

Specifically, with continued reference to fig. 2, a first electric energy type stack, designated as M, for designing and matching high electrical efficiency and fixed current operating point output (quiescent point) is provided _e The electric pile is formed. Designing and matching a first thermal type stack with high thermal efficiency and fixed current operating point output (quiescent point), can be expressed as M _H The electric pile is formed. The second electric energy type galvanic pile with better comprehensive dynamic performance is designed and matched and can be expressed as m _e The electric pile is formed. Can be understood as m _e The electric output power of the electric pile is adjustable and is used for dynamically compensating the target difference value of the electric energy demand. The second heat energy type electric pile with better comprehensive dynamic performance is designed and matched and can be expressed as m _H The electric pile is formed. Can be understood as m _H The thermal output power of the electric pile is adjustable, and the electric pile is used for dynamically compensating the target difference of the heat energy demand.

In the electric mode, the first electric energy type electric pile is controlled to mainly output electric energy at high potential, so that the first electric energy type electric pile outputs the generated power in the high-efficiency power generation area; and controlling the first thermal energy type electric pile to mainly output electric energy at a high potential, so that the first thermal energy type electric pile outputs the generated power in the high-efficiency power generation area. In the thermal mode, the first electric energy type galvanic pile is controlled to mainly output electric energy at a low electric potential, so that the first electric energy type galvanic pile outputs heating power in a heating high-efficiency area; the first heat energy type electric pile is controlled to mainly output electric energy at a low potential, so that the first heat energy type electric pile outputs heating power in the heating high-efficiency area.

On the basis of the foregoing embodiment, fig. 4 is a flowchart of another dynamic scheduling method for a fuel cell microgrid power supply system according to an embodiment of the present invention, and referring to fig. 4, the dynamic scheduling method for a fuel cell microgrid power supply system includes:

s210, determining the working mode of the fuel cell microgrid energy supply system according to the demand ratio of the electricity power and the heat power of the current user; the working modes of the fuel cell microgrid energy supply system comprise an electric mode and a thermal mode.

S220, in the power mode, controlling the first electric energy type galvanic pile to output the fixed generated power in the power generation high-efficiency area; controlling the first thermal energy type electric pile and the second thermal energy type electric pile to not work or outputting the electric piles with fixed generating power in a generating high-efficiency area; and controlling the second electric energy type electric pile to dynamically compensate the electric energy demand.

Under the electricity mode promptly, the energy output of dynamic deployment electric energy type galvanic pile module and heat energy type galvanic pile module includes:

controlling the first electric energy type electric pile to output with fixed generated power in the power generation high-efficiency area;

controlling the first thermal type electric pile and the second thermal type electric pile not to work or outputting the electric piles with fixed generated power in the high-efficiency power generation area;

and controlling the second electric energy type electric pile to dynamically compensate the target difference of the electric energy demand.

Specifically, with continued reference to fig. 2, the fuel cell stack module 10 is designed to match with an electric energy type stack module M _e1 、M _e2 ...M _e（m-1）、M _e（m） And m _e1 、m _e2 …m _e（k-1）、m _e（k） Configuring M pieces of M according to the design requirement of electric energy _e A type cell stack, provided with k pieces of m _e A galvanic pile; and designing matched thermal energy type electric pile module M _H1 、M _H2 ...M _H（j-1）、M _H（j） And m _H1 、m _H2 …m _H（n-1）、m _H（n） Configuring j pieces M according to the design requirement of heat energy _H A cell stack of n pieces of m _H The electric pile is formed.

When the demand for electric energy is dominant, i.e.

Or is or->

。

M _e1 、M _e2 ...M _e（m-1）、M _e（m） Operates at a fixed output value in the power generation high efficiency region A and satisfies

，m _e1 、m _e2 …m _e（k-1）、m _e（k） Within the range of the high power generation efficiency point and the rated operation point, the power demand is used as a signal according to

And carrying out power dynamic regulation and control to meet power dynamic demand response. The heat energy type galvanic pile module M in the process _H1 、M _H2 ...M _H（j-1）、M _H（j） And m _H1 、m _H2 …m _H（n-1）、m _H（n） Either not in operation or in a designed fixed value output mode with optimal electrical efficiency.

In the electric mode, the fixed generated power of the first electric energy type electric pile (Me type electric pile) may be generated power with the highest use frequency determined based on the historical electricity consumption data of the user, or may be generated power corresponding to the minimum electricity consumption determined based on the historical electricity consumption data of the user.

Illustratively, if the demand frequency determined based on the historical electricity consumption data of the user is up to 500kW and there are 10 first electric energy type electric stacks, each first electric energy type electric energy stack can be controlled with an output power of 50 kW. If the current user demand electric power is 800kW, the 300kW that is lacked can be partially discharged from the cell stack (M) in the thermal energy type cell stack module 12 _H A type electric pile and m _H Type galvanic pile) and a galvanic pile (m) partially composed of a second electrical energy _e Type galvanic pile). Or all by a second electric energy type stack (m) _e Type galvanic pile). If the power consumption required by the current user is 300kW, the electricity with 200kW output power which is produced by the current user can be provided to the power grid in a grid-connected mode.

When the output power corresponding to the minimum power consumption is determined based on the historical power consumption data of the user, the electric pile (M) in the thermal energy type electric pile module 12 can be directly controlled according to the lack of the output power _H A type electric pile and m _H Type galvanic pile) and a part of second electric energy type galvanic pile (m) _e Type galvanic pile) together; or, controlling all the second electric energy type stacks (m) _e Type galvanic pile). The integrated power supply system does not need to be connected with the power grid.

Optionally, before controlling the second electric energy type stack to dynamically compensate the electric energy requirement, the method further includes:

determining whether a required change amount of generated power within a preset time satisfies a first power type stack (M) _e Type galvanic pile) generating power of an integer multiple and having a correspondingly adjustable number of first galvanic piles (M) of electrical energy _e Type galvanic pile); if yes, controlling to shut down or start up a corresponding number of first electric energy type electric piles (M) _e Type galvanic pile);

or, it is judged whether or not a required change amount of the generated power within a preset time satisfies a first thermal type stack (M) _H Type galvanic pile) generating power of an integer multiple and having a correspondingly adjustable number of first thermal type galvanic piles (M) _H Type galvanic pile) regulation amount; if yes, controlling to shut down or start a corresponding number of first heat energy type electric piles (M) _H Type galvanic pile).

Specifically, the required generated power is monitored within a time period Delta T in the power generation process

Is changed value->

. Taking the reduction of the required generated power as an example, if>

Is->

Is an integer multiple X of or->

Integral multiple of Y, then X M are shut down _e Or Y of M _H 。

If it is

Is->

By a sum of integer multiples X and a, i.e. shutting down X M _e The type galvanic pile is insufficient to meet the reduction amount of the required generated power, and the remaining a can dynamically meet the electric energy requirement by reducing the output power of the second electric energy type galvanic pile. Or is present in>

Is->

The sum of the integer multiples of Y and b, that is, the reduction amount of the generated power that the shutdown of the Y MH type galvanic piles is not enough to meet the demand, the remaining b can dynamically meet the demand of the electric energy by reducing the output power of the second electric energy type galvanic pile.

In the electrical mode, preferably, Y M s are selected to be turned off first _H The electric pile is formed, and the mode can ensure the optimal output effect of electric energy.

In addition, if the heat energy is still remained in the process when the extreme electric energy and thermoelectric deviation exist, the heat energy is dissipated to the atmosphere through the radiator 41 in fig. 2, and the cooling temperature flowing back into the cell stack is ensured to be at the proper temperature.

S230, under the thermal mode, controlling the first thermal energy type electric pile to output the heating power fixed in the heating high-efficiency area; controlling the first electric energy type electric pile and the second electric energy type electric pile to be out of operation or outputting the electric energy with fixed heating power in the heating high-efficiency area; and controlling the second heat energy type electric pile to dynamically compensate the heat energy requirement.

Namely, in the thermal mode, the energy output of the electric energy type stack module 11 and the thermal energy type stack module 12 is dynamically scheduled, including:

controlling the first thermal type stack to output a fixed heating power in the heating high-efficiency region;

controlling the first electric energy type electric pile and the second electric energy type electric pile to be out of operation or outputting the electric energy at fixed heating power in the heating high-efficiency area;

and controlling the second heat energy type electric pile to dynamically compensate the heat energy requirement.

In particular, when the thermal energy demand is predominant, i.e.

Or is or->

. In the mode, the heat production requirement is higher than the power generation requirement, the calculation and control in the operation process aim at maximizing the heat output, and the heat meeting and the power consumption are both reasonably consumed to be optimal. M is a group of _H1 、M _H2 ...M _H（j-1）、M _H（j） Operating at a fixed output in the region of high thermal efficiency, m _H1 、m _H2 …m _H（n-1）、m _H（n） Performing heat dynamic regulation and control by taking heat demand as a signal within the range of a high-yield heat efficiency point and a rated operation point so as to meet the power dynamic demand response; m _e1 、M _e2 ...M _e（m-1）、M _e（m） And m _e1 、m _e2 …m _e（k-1）、m _e（k） And the device does not work or operates at a fixed output value in a heat-generating efficient area.

In the thermal mode, the fixed generated power of the first thermal energy type stack is the generated power with the highest frequency of use determined based on the historical heat data of the user, or the corresponding generated power when the amount of heat used determined based on the historical heat data of the user is the minimum. Preferably, the heating power corresponding to the minimum heat consumption determined based on the historical heat consumption data of the user is used for avoiding resource waste caused by excessive heat generation.

Optionally, before controlling the second thermal energy type stack to dynamically compensate for the electric energy requirement, the method further includes:

determining whether a required change amount of the heating power within a predetermined time satisfies a first power type stack (M) _e Type electric pile) heating power of integral multiple, andand with a correspondingly adjustable number of first electric-energy-type galvanic piles (M) _e Type galvanic pile); if yes, controlling to shut down or start a corresponding number of first electric energy type electric piles (M) _e Type galvanic pile);

or, judging whether the required change amount of the heating power in a preset time satisfies a first thermal type stack (M) _H Type galvanic pile) heating power of integral multiple, and has corresponding adjustable number of first thermal type galvanic piles (M) _H Type galvanic pile) regulation amount; if yes, controlling to shut down or start a corresponding number of first heat energy type electric piles (M) _H Type galvanic pile).

Preferably, the control switches off or on a corresponding number of first electric energy type cells (M) _e A type galvanic pile) which can ensure the best output effect of heat energy.

The dynamic scheduling method of the fuel cell microgrid energy supply system provided by the embodiment of the invention distinguishes the static operation module and the dynamic regulation and control module. In the matching design process, the static and dynamic characteristic point accurate control of the electric energy type and heat energy type modules is divided according to the application and demand characteristics, the characteristics of the power generation area and the heat generation area are controlled in the area with the best electric efficiency or heat efficiency according to the characteristic curve of the modules, the state regulation is carried out, and the optimal economic operation mode is met.

On the basis of the foregoing embodiment, in an embodiment of the present invention, optionally, the electric energy type stack module further includes at least one third electric energy type stack, where the third electric energy type stack is used as an alternate shutdown stack of the first electric energy type stack; alternatively, the third power type stack is used as a fail-back stack of the first power type stack.

When the third electric energy type electric pile is used as a fault standby electric pile of the first electric energy type electric pile, the dynamic scheduling method of the fuel cell microgrid energy supply system further comprises the following steps:

when a first electric energy type electric pile with a fault occurs in the plurality of first electric energy type electric piles, the third electric energy type electric piles with the same number as the first electric energy type electric piles with the fault are controlled to be started to replace the first electric energy type electric piles with the fault to continue working, and therefore the energy scheduling of the comprehensive power supply system can be prevented from being influenced.

When the third electric energy type electric pile is used as an alternate shutdown electric pile of the first electric energy type electric pile, the dynamic scheduling method of the fuel cell microgrid energy supply system further comprises the following steps:

controlling the working state of the first electric energy type electric pile and the working state of the third electric energy type electric pile according to a preset start-stop period; wherein the total number of the first power type cell stack and the third power type cell stack which are simultaneously started is maintained constant.

It is to be understood that each first power type stack is operated for a certain period of time (for example, one month, six months, or one year), stopped, and replaced by another first power type stack which is full at a time of other down-time, or replaced by another third power type stack which is full at a time of other down-time. So that the first power type cell stack in the system can be alternately shut down.

Illustratively, the power type cell stack module 11 includes 10 first power type cell stacks and 3 third power type cell stacks; the 10 first electric energy type galvanic piles are numbered from No. 1 to No. 10 in sequence; the number of the 2 third electric energy type galvanic piles is 11, 12 and 13. After 10 first electric energy type galvanic piles numbered from No. 1 to No. 10 are controlled to operate for a period of time, the galvanic pile No. 1 can be controlled to stop working, and the galvanic pile No. 11 is started to replace the galvanic pile No. 1 to work; after running for a period of time, the No. 1 and No. 2 galvanic piles stop working, and the No. 11 and No. 12 galvanic piles are started to replace the No. 1 galvanic piles and the No. 2 galvanic piles to work. After running for a period of time, the electric piles No. 1, no. 2 and No. 3 stop working, and the electric piles No. 11, no. 12 and No. 13 are started to replace the electric piles No. 1, no. 2 and No. 3 to work. After running for a period of time, stopping the electric piles No. 2, no. 3 and No. 4, and restarting the electric pile No. 1; controlling the working state of the first electric energy type electric pile and the starting and stopping working state of the third electric energy type electric pile according to a preset starting and stopping period by analogy; and the total number of the electric piles started at the same time is kept unchanged. Tests prove that the service life of the combined heat and power system can be effectively prolonged by the alternative shutdown mode. In the embodiment of the invention, the ratio Ks of the total number of the first electric energy type electric pile and the third electric energy type electric pile to the total number of the operating electric piles in the first electric energy type electric pile and the third electric energy type electric pile is more than or equal to 1.2.

On the basis of the above embodiments, in an embodiment of the present invention, optionally, the thermal energy type stack module further includes at least one third thermal energy type stack, where the third thermal energy type stack is used as an alternate shutdown stack of the first thermal energy type stack; alternatively, the third thermal type stack is used as a fail-back stack of the first thermal type stack.

If the third thermal energy type galvanic pile is used as a fault standby galvanic pile of the first thermal energy type galvanic pile; the dynamic scheduling method of the fuel cell microgrid energy supply system further comprises the following steps:

when a first thermal energy type electric pile with a fault appears in the plurality of first thermal energy type electric piles, controlling and starting third thermal energy type electric piles with the same number as the first thermal energy type electric piles with the fault to replace the first thermal energy type electric pile with the fault to continue working; thereby avoiding affecting the energy scheduling of the integrated power supply system.

If the third thermal energy type electric pile is used as the alternate shutdown electric pile of the first thermal energy type electric pile; the dynamic scheduling method of the fuel cell microgrid energy supply system further comprises the following steps:

controlling the working state of the first heat energy type galvanic pile and the working state of the third heat energy type galvanic pile according to a preset start-stop period; wherein the total number of the first thermal type cell stack and the third thermal type cell stack which are simultaneously started up is kept constant.

It will be appreciated that each first thermal type stack is operated for a period of time (for example, one month, six months, or one year), and then stopped, and replaced by other first thermal type stacks at full down time, or replaced by other third thermal type stacks at full down time, so that the first thermal type stacks in the system can be alternately shut down. For a specific alternative shutdown mode, reference may be made to an alternative shutdown mode of the first electric energy type stack and the third electric energy type stack, which is not described herein again.

Referring to fig. 2, an embodiment of the present invention further provides a fuel cell microgrid power supply system, which is configured to perform the dynamic scheduling method of the fuel cell microgrid power supply system according to any of the embodiments described above; the fuel cell microgrid energy supply system comprises an electric energy type electric pile module 11 and a heat energy type electric pile module 12; the electricity generation efficiency of the galvanic pile in the electric energy type galvanic pile module 11 is greater than that of the galvanic pile in the heat energy type galvanic pile module 12, and the heat generation efficiency of the galvanic pile in the heat energy type galvanic pile module 12 is greater than that of the galvanic pile in the electric energy type galvanic pile module 11;

the working modes of the fuel cell microgrid energy supply system comprise an electric mode and a thermal mode; in the electrical mode, the energy output of the electric energy type electric pile module 11 and the thermal energy type electric pile module 12 is dynamically allocated to mainly supply power; in the thermal mode, the energy output of the electric energy type stack module 11 and the thermal energy type stack module 12 are dynamically adjusted to mainly supply heat.

Optionally, the electric energy type stack module 11 includes a plurality of first electric energy type stacks (M) _H1 、M _H2 ...M _H（j-1）、M _H（j） ) And a plurality of second power type stacks (M) _e1 、M _e2 ...M _e（m-1）、M _e（m） ) (ii) a The thermal type electric pile module 12 comprises a plurality of first thermal type electric piles (M) _H1 、M _H2 ...M _H（j-1）、M _H（j） ) And a plurality of second thermal energy type stacks (m) _H1 、m _H2 …m _H（n-1）、m _H（n））；

In the electric mode, the first electric energy type electric pile is used for outputting fixed generated power in the power generation high-efficiency area; the first thermal type electric pile and the second thermal type electric pile do not work, or output with the fixed generated power in the high-efficiency power generation area; the second electric energy type electric pile is used for dynamically compensating the electric energy requirement;

in the heat mode, the first heat energy type electric pile is used for outputting with fixed heating power in the heating high-efficiency area; the first electric energy type electric pile and the second electric energy type electric pile do not work, or are output with fixed heating power in the heating high-efficiency area; the second thermal type stack is used to dynamically compensate for thermal energy requirements.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements and substitutions will now be apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in some detail by the above embodiments, the invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the invention, and the scope of the invention is determined by the scope of the appended claims.

Claims

1. The dynamic scheduling method of the fuel cell microgrid energy supply system is characterized in that the fuel cell microgrid energy supply system comprises an electric energy type electric pile module and a heat energy type electric pile module; the electricity generating efficiency of the galvanic pile in the electric energy type galvanic pile module is greater than that of the galvanic pile in the heat energy type galvanic pile module, and the heat generating efficiency of the galvanic pile in the heat energy type galvanic pile module is greater than that of the galvanic pile in the electric energy type galvanic pile module; the dynamic scheduling method of the fuel cell microgrid energy supply system comprises the following steps:

determining the working mode of the fuel cell microgrid energy supply system according to the demand ratio of the electricity power consumption and the heat power consumption of the current user; the working modes of the fuel cell microgrid energy supply system comprise an electric mode and a thermal mode;

2. The dynamic scheduling method of the fuel cell microgrid power supply system of claim 1, wherein the determining of the operation mode of the fuel cell microgrid power supply system according to the demand ratio of the electricity power and the heat power of the current users comprises:

3. The dynamic scheduling method of the fuel cell microgrid power supply system of claim 1, wherein the determining of the operation mode of the fuel cell microgrid power supply system according to the demand ratio of the electricity power and the heat power of the current users comprises:

if the demand ratio of the electricity power and the heat power of the current user is smaller than the ratio of the electricity generation efficiency and the heat generation efficiency of the fuel cell micro-grid energy supply system, determining that the working mode of the fuel cell micro-grid energy supply system is a thermal mode mainly based on low potential output;

4. The dynamic scheduling method of the fuel cell microgrid power supply system of claim 1, characterized in that the electric energy type electric pile module comprises a plurality of first electric energy type electric piles and a plurality of second electric energy type electric piles; the heat energy type electric pile module comprises a plurality of first heat energy type electric piles and a plurality of second heat energy type electric piles; the electric pile in the electric energy type electric pile module and the electric pile in the heat energy type electric pile module are provided with a power generation high-efficiency area and a heat generation high-efficiency area; the voltage output by the electric pile in the power generation high-efficiency area is higher than the voltage output by the heat generation high-efficiency area, and the current density j output by the electric pile in the power generation high-efficiency area is less than the current density j output by the heat generation high-efficiency area; such that the power generated by the stack in the power generation efficient zone is higher than the power generated in the heat generation efficient zone, and the heating power of the stack in the power generation efficient zone is lower than the heating power in the heat generation efficient zone;

under the electricity mode, dynamic deployment the energy output of electric energy type galvanic pile module and the heat energy type galvanic pile module includes:

controlling the first electric energy type electric pile to output with fixed generating power in a generating high-efficiency area;

controlling the first thermal type electric pile to output heating power fixed in the heating high-efficiency area;

controlling the first electric energy type electric pile and the second electric energy type electric pile to not work or outputting the electric energy type electric piles with fixed heating power in a heating high-efficiency area;

5. The dynamic scheduling method for the fuel cell microgrid power supply system according to claim 4, characterized in that the electric energy type electric pile module further comprises at least one third electric energy type electric pile, and the third electric energy type electric pile is used as an alternate shutdown electric pile of the first electric energy type electric pile; the dynamic scheduling method of the fuel cell microgrid energy supply system further comprises the following steps:

controlling the working state of the first electric energy type electric pile and the working state of the third electric energy type electric pile according to a preset start-stop period; wherein the total number of the first electric energy type electric pile and the third electric energy type electric pile which are started simultaneously is kept unchanged;

controlling the working state of the first thermal energy type electric pile and the working state of the third thermal energy type electric pile according to a preset start-stop period; wherein the total number of the first thermal type cell stack and the third thermal type cell stack which are simultaneously started up is kept unchanged;

and when a first thermal energy type electric pile with a fault occurs in a plurality of first thermal energy type electric piles, controlling and starting third thermal energy type electric piles with the same number as the first thermal energy type electric piles with the fault to replace the first thermal energy type electric pile with the fault to continue working.

6. The dynamic scheduling method for the fuel cell microgrid power supply system according to claim 4, characterized in that before controlling the second electric energy type electric pile to dynamically compensate the electric energy demand, the method further comprises:

or judging whether the required change amount of the generated power in a preset time meets integral multiple of the generated power of one first heat energy type electric pile and has corresponding adjustment amount of the first heat energy type electric piles with adjustable quantity; and if so, controlling to shut down or start up the first heat energy type electric piles in corresponding quantity.

7. The dynamic scheduling method of the fuel cell microgrid power supply system of claim 4, wherein before controlling the second electric energy type electric pile to dynamically compensate the thermal energy demand, further comprising:

judging whether the required change amount of the heating power in a preset time meets integral multiple of the heating power of one first heat energy type electric pile, and the first heat energy type electric piles with corresponding adjustable quantity are provided; if yes, controlling to shut down or start a corresponding number of first heat energy type electric piles;

or, judging whether the required variation of the heating power in a preset time meets integral multiple of the heating power of one first electric energy type galvanic pile, and the first electric energy type galvanic piles with corresponding adjustable quantity are provided; and if so, controlling to shut down or start up the first electric energy type electric piles in corresponding quantity.

8. The dynamic scheduling method of the fuel cell microgrid powering system of claim 4, characterized in that,

in the electricity mode, the fixed generated power of the first electric energy type electric pile is the generated power with the highest use frequency determined based on the historical electricity utilization data of the user, or the corresponding generated power when the electricity consumption determined based on the historical electricity utilization data of the user is the minimum;

in the thermal mode, the fixed heating power of the first thermal energy type electric pile is the heating power with the highest use frequency determined based on the historical heat data of the user, or the heating power corresponding to the minimum heat consumption determined based on the historical heat data of the user.

9. A micro-grid energy supply system for a fuel cell is characterized by comprising an electric energy type electric pile module and a heat energy type electric pile module; the electricity generating efficiency of the galvanic pile in the electric energy type galvanic pile module is greater than that of the galvanic pile in the heat energy type galvanic pile module, and the heat generating efficiency of the galvanic pile in the heat energy type galvanic pile module is greater than that of the galvanic pile in the electric energy type galvanic pile module;

the working modes of the fuel cell microgrid energy supply system comprise an electric mode and a thermal mode; in the electric mode, dynamically allocating the energy output of the electric energy type electric pile module and the heat energy type electric pile module to mainly supply power; and dynamically allocating the energy output of the electric energy type galvanic pile module and the heat energy type galvanic pile module under the heat mode to mainly supply heat.

10. The fuel cell microgrid powering system of claim 9, wherein said electric energy type cell stack module comprises a plurality of first electric energy type cell stacks and a plurality of second electric energy type cell stacks; the heat energy type electric pile module comprises a plurality of first heat energy type electric piles and a plurality of second heat energy type electric piles; the electric pile in the electric energy type electric pile module and the electric pile in the heat energy type electric pile module are provided with a high-efficiency power generation area and a high-efficiency heat generation area; the voltage output by the electric pile in the power generation high-efficiency area is higher than the voltage output by the heat generation high-efficiency area, and the current density j output by the electric pile in the power generation high-efficiency area is less than the current density j output by the heat generation high-efficiency area; such that the power generated by the stack in the power generation efficient zone is higher than the power generated in the heat generation efficient zone, and the heating power of the stack in the power generation efficient zone is lower than the heating power in the heat generation efficient zone;

in the electric mode, the first electric energy type electric pile is used for outputting the generated power fixed in the power generation high-efficiency area; the first thermal energy type electric pile and the second thermal energy type electric pile do not work, or output by fixed generating power in a generating high-efficiency area; the second electric energy type electric pile is used for dynamically compensating a target difference value of electric energy requirements;

in the thermal mode, the first thermal energy type electric pile is used for outputting heating power fixed in the heating high-efficiency area; the first electric energy type electric pile and the second electric energy type electric pile do not work, or are output by fixed heating power in a heating high-efficiency area; the second thermal type stack is used for dynamically compensating the target difference of the thermal energy demand.