CN113328470A - Multi-state energy capacity and energy storage comprehensive utilization system - Google Patents

Multi-state energy capacity and energy storage comprehensive utilization system Download PDF

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CN113328470A
CN113328470A CN202110648651.1A CN202110648651A CN113328470A CN 113328470 A CN113328470 A CN 113328470A CN 202110648651 A CN202110648651 A CN 202110648651A CN 113328470 A CN113328470 A CN 113328470A
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energy
soc
module
voltage
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CN113328470B (en
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郑罡
王磊
马鑫
秦泽华
王宏研
于永哲
孔真真
王方苏
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State Grid Corp of China SGCC
Kaifeng Power Supply Co of State Grid Henan Electric Power Co Ltd
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State Grid Corp of China SGCC
Kaifeng Power Supply Co of State Grid Henan Electric Power Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
    • H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
    • H02J3/144—Demand-response operation of the power transmission or distribution network
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/388—Islanding, i.e. disconnection of local power supply from the network
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/22—The renewable source being solar energy
    • H02J2300/24—The renewable source being solar energy of photovoltaic origin
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/28—The renewable source being wind energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems
    • Y04S20/222—Demand response systems, e.g. load shedding, peak shaving

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The invention provides a capacity and energy storage comprehensive utilization system of polymorphic energy, which comprises a polymorphic energy module and a control system, wherein the polymorphic energy module and the control system are connected by a power grid bus, the control system comprises a voltage acquisition module, an analysis module and a voltage regulation module, the voltage acquisition module is used for acquiring voltage parameters of the polymorphic energy module and a voltage value V of the power grid bus in the current state, the acquisition module is used for acquiring energy storage parameters of the polymorphic energy module in the current state, and the analysis module is used for acquiring and analyzing the acquisition values of the voltage acquisition module and the acquisition module so as to control the adjustment module to work to adjust the polymorphic energy module; according to the invention, the control system is used for calculating the related parameters, so that the switching conditions among various operation modes are determined, the practical decision on the whole operation is realized, the ordered operation of the comprehensive energy system based on the energy hub under various working conditions is realized, and the problem of the interconnected operation of various energy sources is solved.

Description

Multi-state energy capacity and energy storage comprehensive utilization system
Technical Field
The invention relates to the technical field of comprehensive energy control of an energy hub, in particular to a comprehensive utilization system for capacity and energy storage of multi-state energy.
Background
The comprehensive energy is used as a major development strategy of future energy in China and is widely concerned by the power industry. Compared with the traditional power system, the comprehensive energy system has obvious differences in the aspects of user behaviors, operation methods, demand response and the like, and the market width, the time scale and the geographic dimensionality of the traditional power industry are expanded through the coupling linkage of various types of energy. An Energy Hub (EH) is an aggregate of multiple Energy utilization forms such as Energy storage, combined supply of cold and heat, load and the like, is a key link for constructing a comprehensive Energy system, and gradually receives wide attention from the power industry in recent years.
The comprehensive energy system of the energy hub comprises a plurality of units such as wind power, photovoltaic and energy storage units, and because the environmental factors are different, the power generation conditions of the wind power, the photovoltaic and the energy storage units are different, the control strategies of the units such as the wind power, the photovoltaic and the energy storage units determine the operation mode of the comprehensive energy system based on the energy hub, and under the grid-connected operation mode and the off-grid operation mode of the comprehensive energy system, the control strategies of each unit need to be adjusted, so that the stable and reliable operation of the comprehensive energy system based on the energy hub under the complex working condition is ensured.
The comprehensive energy system based on the energy hub has different adjusting capacities of different types of energy units such as wind power, photovoltaic and energy storage, the overall performance of the system during cooperative operation is closely related to factors such as distributed power generation conditions and equipment operation conditions such as energy storage states, and meanwhile, the operation modes of the comprehensive energy system based on the energy hub under complex conditions are fully discriminated under the constraint of the physical characteristics of the units, and the extraction of corresponding switching conditions aiming at different operation modes is a key difficult problem for realizing the stable operation of the system.
Disclosure of Invention
In view of the above problems, the present application provides a comprehensive utilization system for energy storage and capacity generation of multi-state energy, which ensures that a comprehensive energy system based on an energy hub operates orderly under various working conditions.
The invention provides a capacity and energy storage comprehensive utilization system of multi-state energy, which comprises a multi-state energy module and a control system, wherein the multi-state energy module is connected with a power grid bus, the control system comprises a voltage acquisition module, an analysis module and a voltage regulation module, the voltage acquisition module is used for acquiring voltage parameters of the multi-state energy module and a voltage value V of the power grid bus in the current state, the acquisition module is used for acquiring energy storage parameters of the multi-state energy module in the current state, and the analysis module is used for acquiring and analyzing the acquisition values of the voltage acquisition module and the acquisition module so as to control the adjustment module to work to adjust the multi-state energy module.
Furthermore, the multi-state energy module comprises an energy storage device and a plurality of groups of capacity devices connected with the energy storage device, the plurality of groups of capacity devices and the energy storage device are both connected with a power grid bus, and each group of capacity devices is provided with a load.
Further, the voltage parameter includes an access point voltage value V of the multi-state energy module accessing the power grid bus in the current state; the energy storage parameters comprise energy storage power P and energy storage charge state SOC of the energy storage device in the current running state.
Further, the method can be used for preparing a novel materialIn which V isLIn order to allow the access point to have the lowest voltage, the analysis and control method of the analysis module comprises the following steps:
step one, when the voltage value V of the access point0＜VLWhen the multi-state energy module is switched to the island mode, the multi-state energy module is controlled to be switched to the island mode;
step two, setting a high margin scene: pMAX>0，SOC MAX>α1，VMAX>β1In which P isMAXFor storing maximum absorbed power, SOC MAXFor storing the highest state of charge, VMAXIs the maximum voltage of the bus, α1Is an allowable upper limit value of the state of charge, beta1Allowing an upper limit value for the bus voltage;
step three, setting a low allowance scene: pMIN<0，SOCMIN<α2，VMIN<β2In which P isMINFor storing maximum output power, SOCMINFor storing energy at minimum state of charge, VMINAt the lowest bus voltage, α2Is a lower limit allowable for the state of charge, beta2A bus voltage allowable lower limit value;
acquiring energy storage power P, energy storage charge state SOC and voltage V of a power grid bus in the current running state;
step five, calculating the distance D1 between the current multi-state energy module and the high-margin scene:
D1={PMAX/PBASE*P/PBASE+SOCMAX/SOCBASE*SOC/SOCBASE+VMAX/VBASE*V/VBASE}/{Sqrt(PMAX/PBASE*PMAX/PBASE+P/PBASE*P/PBASE)*Sqrt(SOCMAX/SOCBASE*SOCMAX/SOCBASE+SOC/SOCBASE*SOC/SOCBASE)*Sqrt(VMAX/VBASE*VMAX/VBASE+ V/VBASE* V/VBASE)}；
step six, calculating the distance D2 between the current multi-state energy module and the low-margin scene:
D2={PMIN/PBASE*P/PBASE+SOCMIN/SOCBASE*SOC/SOCBASE+VMIN/VBASE*V/VBASE}/{Sqrt(PMIN/PBASE*PMIN/PBASE+P/PBASE*P/PBASE)*Sqrt(SOCMIN/SOCBASE*SOCMIN/SOCBASE+SOC/SOCBASE*SOC/SOCBASE)*Sqrt(VMIN/VBASE*VMIN/VBASE+ V/VBASE* V/VBASE)}；
in particular, wherein VBASEIs the rated phase voltage of the bus, PBASEFor rated energy storage power, SOC, of the energy storage deviceBASEIs the nominal energy storage state of charge.
Seventhly, adjusting the plurality of capacity devices and the loads according to the difference value between the D1 and the D2, so that the access point voltage is adjusted;
step eight, when the voltage value V of the access point0≥VLAnd controlling the multi-state energy module to be switched into a grid-connected mode.
Further, the seventh step includes: when D1-D2 is less than 0, adjusting the cutting part of the energy-generating device or/and increasing the load quantity;
when D1-D2 > 0, then the adjustment increases the number of the energy-producing devices or/and decreases the number of loads.
Further, the energy production device comprises a wind power generation set, a photovoltaic power generation set and a steam power generation set.
The invention provides a capacity and energy storage comprehensive utilization system of polymorphic energy, which is characterized in that a typical scene of a polymorphic energy module based on an energy hub is analyzed, and relevant parameters of an energy storage device and a capacity device are collected for calculation, so that switching conditions among various operation modes are determined, the practical decision on the whole operation is realized, the ordered operation of the comprehensive energy system based on the energy hub under various working conditions is realized, the energy hub-based comprehensive energy system can be realized through the cooperation of various energy sources, the problem of the interconnected operation of various energy sources is solved, the access permeability of renewable energy sources is further improved, the power supply reliability is improved, and the high-efficiency operation of the whole system is ensured.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a comprehensive utilization system for energy production and energy storage of polymorphic energy provided by the present invention.
Fig. 2 is a schematic structural diagram of a control system in the comprehensive utilization system for energy production and energy storage of multi-state energy provided by the invention.
Fig. 3 is a schematic flow chart of an analysis module analysis and control method in the comprehensive utilization system for energy production and energy storage of multi-state energy provided by the present invention.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The invention provides a capacity and energy storage comprehensive utilization system of multi-state energy, and as a specific implementation manner, referring to fig. 1-3, the comprehensive utilization system comprises a multi-state energy module 1 and a control system 3 connected with a power grid bus 2, wherein the control system 3 comprises a voltage acquisition module 31, an acquisition module 32, an analysis module 33 and a voltage regulation module 34, the voltage acquisition module 31 is used for acquiring voltage parameters of the multi-state energy module 1 and voltage values V of the power grid bus in a current state, the acquisition module 32 is used for acquiring energy storage parameters of the multi-state energy module 1 in the current state, and the analysis module 33 is used for acquiring and analyzing the acquired values of the voltage acquisition module 31 and the acquisition module 32, so as to control the regulation module 34 to regulate the multi-state energy module 1.
Further, referring to fig. 1, as a specific embodiment, the multi-state energy module 1 includes an energy storage device 11 and a plurality of sets of capacity devices 12 connected to the energy storage device 11, the plurality of sets of capacity devices 12 and the energy storage device 1 are both connected to a power grid bus 2, and each set of capacity devices 2 is provided with a load.
Further, the voltage parameter includes an access point voltage value V of the multi-state energy module 1 accessing the power grid bus in the current state0(ii) a The energy storage parameters include energy storage power P and energy storage state of charge SOC of the energy storage device 12 in the current operating state.
Specifically, the voltage obtaining module 31 may be a voltage obtaining device of the energy storage device and the capacity device itself, and obtain voltage values of the capacity devices and the energy storage device through the existing device, where the voltage value of the access point is a voltage value of an access point between each capacity device and the power grid bus; the acquisition module is a device of the energy storage device itself and is used for acquiring the energy storage power and the energy storage charge state of the energy storage device itself, wherein the energy storage device 11 can be a capacitive energy storage device or a battery pack.
Further, with reference to FIG. 3, as a specific embodiment, wherein VLIn order to allow the access point to have the lowest voltage, the analyzing and controlling method of the analyzing module 33 includes the following steps:
step one, when the voltage value V of the access point0＜VLWhen the multi-state energy module 1 is switched to the island mode, the multi-state energy module 1 is controlled to be switched to the island mode;
specifically, each capacity device can be controlled by acquiring the access point voltage of each capacity device 12, and when the access point voltage of the capacity device is lower than the lowest allowable voltage, the multi-state energy module 1 is controlled to be switched to an island mode, so as to adjust the voltage of the capacity device of each internal unit;
step two, setting a high margin scene: pMAX>0，SOC MAX>α1，VMAX>β1In which P isMAXFor storing energyMaximum absorbed power, SOC MAXFor storing the highest state of charge, VMAXIs the maximum voltage of the bus, α1Is an allowable upper limit value of the state of charge, beta1Allowing an upper limit value for the bus voltage;
step three, setting a low allowance scene: pMIN<0，SOCMIN<α2，VMIN<β2In which P isMINFor storing maximum output power, SOCMINFor storing energy at minimum state of charge, VMINAt the lowest bus voltage, α2Is a lower limit allowable for the state of charge, beta2A bus voltage allowable lower limit value;
acquiring energy storage power P, energy storage charge state SOC and voltage V of a power grid bus in the current running state;
step five, calculating the distance D1 between the current polymorphic energy module 1 and a high-margin scene:
D1={PMAX/PBASE*P/PBASE+SOCMAX/SOCBASE*SOC/SOCBASE+VMAX/VBASE*V/VBASE}/{Sqrt(PMAX/PBASE*PMAX/PBASE+P/PBASE*P/PBASE)*Sqrt(SOCMAX/SOCBASE*SOCMAX/SOCBASE+SOC/SOCBASE*SOC/SOCBASE)*Sqrt(VMAX/VBASE*VMAX/VBASE+ V/VBASE* V/VBASE)}；
step six, calculating the distance D2 between the current polymorphic energy module 1 and a low-margin scene:
D2={PMIN/PBASE*P/PBASE+SOCMIN/SOCBASE*SOC/SOCBASE+VMIN/VBASE*V/VBASE}/{Sqrt(PMIN/PBASE*PMIN/PBASE+P/PBASE*P/PBASE)*Sqrt(SOCMIN/SOCBASE*SOCMIN/SOCBASE+SOC/SOCBASE*SOC/SOCBASE)*Sqrt(VMIN/VBASE*VMIN/VBASE+ V/VBASE* V/VBASE)}；
seventhly, adjusting the plurality of capacity devices 12 and the loads according to the difference value between the D1 and the D2, so as to adjust the access point voltage;
step eight, when the voltage value V of the access point0≥VLAnd then, controlling the multi-state energy module 1 to be switched into a grid-connected mode, and adjusting each unit according to the calculation result by acquiring the parameter of each unit and calculating by the method until the voltage of the access point is adjusted to be higher than VL。
Further, the seventh step includes: when D1-D2 < 0, adjusting the cutting part of the energy-generating device 12 or/and increasing the load quantity;
when D1-D2 is greater than 0, the number of the energy-producing devices 12 is increased or/and the number of the loads is decreased, specifically, the access point voltage can be higher than V by increasing the number of the energy-producing devicesLThe access of the capacity device is lower than VL The power generation device of (1) to boost the power generation device with lower voltage to meet the requirement of the access point voltage, of course, as another embodiment, the access point voltage can be lowered by VLThe load connected to the capacity device is cut off, so that the purpose of boosting is achieved, and the purpose of boosting can be achieved by simultaneously connecting the capacity device and cutting off the load until the access point voltage of the capacity device is higher than VL。
Further, the power generation device 12 includes a wind power generation set, a photovoltaic power generation set and a steam power generation set.
The invention provides a capacity and energy storage comprehensive utilization system of polymorphic energy, which is characterized in that a typical scene of a polymorphic energy module based on an energy hub is analyzed, and relevant parameters of an energy storage device and a capacity device are collected for calculation, so that switching conditions among various operation modes are determined, the practical decision on the whole operation is realized, the ordered operation of the comprehensive energy system based on the energy hub under various working conditions is realized, the energy hub-based comprehensive energy system can be realized through the cooperation of various energy sources, the problem of the interconnected operation of various energy sources is solved, the access permeability of renewable energy sources is further improved, the power supply reliability is improved, and the high-efficiency operation of the whole system is ensured.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (6)

1. A comprehensive utilization system for the energy storage and the productivity of polymorphic energy is characterized by comprising a polymorphic energy module (1) and a control system (3) which are connected by a power grid bus (2), the control system (3) comprises a voltage acquisition module (31), an acquisition module (32), an analysis module (33) and a voltage regulation module (34), the voltage acquisition module (31) is used for acquiring voltage parameters of the multi-state energy module (1) and a voltage value V of the power grid bus in the current state, the acquisition module (32) is used for acquiring the energy storage parameters of the multi-state energy module (1) in the current state, the analysis module (33) is used for acquiring and analyzing the acquisition values of the voltage acquisition module (31) and the acquisition module (32), thereby controlling the operation of the regulating module (34) to regulate the multi-state energy module (1).
2. The energy production and storage comprehensive utilization system of polymorphic energy according to claim 1, characterized in that the polymorphic energy module (1) comprises an energy storage device (11) and a plurality of groups of energy production devices (12) connected to the energy storage device (11), the plurality of groups of energy production devices (12) and the energy storage device (1) are both connected to a power grid bus (2), and each group of energy production devices (2) is provided with a load.
3. The energy production and storage comprehensive utilization system of polymorphic energy according to claim 2, wherein the voltage parameter comprises an access point voltage value V of the polymorphic energy module (1) to the power grid bus in the current state0(ii) a The energy storage parameters comprise energy storage power P and energy storage state of charge SOC of the energy storage device (12) in the current operation state.
4. The comprehensive utilization system of energy production and energy storage of polymorphic energy according to claim 3, wherein V isLFor the access point to allow the lowest voltage, the method of analysis and control of the analysis module (33) comprises the following steps:
step one, when the voltage value V of the access point0＜VLWhen the island mode is selected, the multi-state energy module (1) is controlled to be switched to the island mode;
step two, setting a high margin scene: pMAX>0，SOC MAX>α1， VMAX>β1In which P isMAXFor storing maximum absorbed power, SOC MAXFor storing the highest state of charge, VMAXIs the maximum voltage of the bus, α1Is an allowable upper limit value of the state of charge, beta1Allowing an upper limit value for the bus voltage;
step three, setting a low allowance scene: pMIN<0，SOCMIN<α2，VMIN<β2In which P isMINFor storing maximum output power, SOCMINFor storing energy at minimum state of charge, VMINAt the lowest bus voltage, α2Is a lower limit allowable for the state of charge, beta2A bus voltage allowable lower limit value;
acquiring energy storage power P, energy storage charge state SOC and voltage V of a power grid bus in the current running state;
step five, calculating the distance D1 between the current multi-state energy module (1) and a high-margin scene:
D1={PMAX/PBASE*P/PBASE+SOCMAX/SOCBASE*SOC/SOCBASE+VMAX/VBASE*V/VBASE}/{Sqrt(PMAX/PBASE*PMAX/PBASE+P/PBASE*P/PBASE)*Sqrt(SOCMAX/SOCBASE*SOCMAX/SOCBASE+SOC/SOCBASE*SOC/SOCBASE)*Sqrt(VMAX/VBASE*VMAX/VBASE+ V/VBASE* V/VBASE)}；
step six, calculating the distance D2 between the current multi-state energy module (1) and a low-margin scene:
D2={PMIN/PBASE*P/PBASE+SOCMIN/SOCBASE*SOC/SOCBASE+VMIN/VBASE*V/VBASE}/{Sqrt(PMIN/PBASE*PMIN/PBASE+P/PBASE*P/PBASE)*Sqrt(SOCMIN/SOCBASE*SOCMIN/SOCBASE+SOC/SOCBASE*SOC/SOCBASE)*Sqrt(VMIN/VBASE*VMIN/VBASE+ V/VBASE* V/VBASE)}；
seventhly, adjusting the plurality of capacity devices (12) and loads according to the difference value between the D1 and the D2, so as to adjust the access point voltage;
step eight, when the voltage value V of the access point0≥VLAnd controlling the multi-state energy module (1) to be switched into a grid-connected mode.
5. The comprehensive utilization system of energy production and energy storage of polymorphic energy according to claim 4, wherein the seventh step comprises: when D1-D2 < 0, adjusting the cutting part of the energy generating device (12) or/and increasing the load quantity;
when D1-D2 > 0, then the adjustment increases the number of the power generation devices (12) or/and decreases the number of loads.
6. The energy production and storage comprehensive utilization system of polymorphic energy according to claim 2, wherein the energy production device (12) comprises a wind power generation set, a photovoltaic power generation set and a steam power generation set.
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