CN212486186U - Energy management system based on household combined heat and power supply - Google Patents
Energy management system based on household combined heat and power supply Download PDFInfo
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- CN212486186U CN212486186U CN202022090908.XU CN202022090908U CN212486186U CN 212486186 U CN212486186 U CN 212486186U CN 202022090908 U CN202022090908 U CN 202022090908U CN 212486186 U CN212486186 U CN 212486186U
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- 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
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/10—Photovoltaic [PV]
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- 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
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
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Abstract
The utility model belongs to the new forms of energy comprehensive utilization field provides an energy management system based on supply is united with the family with the thermoelectricity, the utility model discloses a be the core for central controller, to photovoltaic cell subassembly, energy storage system and heat accumulation system unify centralized control, real-time supervision photovoltaic cell subassembly, the operational data of energy storage battery and heat accumulator, according to the operational mode that the operational data who monitors switched energy storage system and heat accumulation system, can avoid energy storage battery and heat accumulator overcharge, the problem of overstocking and overdischarging, increase of service life makes the system safer, high-efficient, economy and reliable operation, simultaneously can also the at utmost utilize solar energy resource.
Description
Technical Field
The utility model relates to a new forms of energy comprehensive utilization field especially relates to an energy management system based on supply is united with thermoelectricity by family.
Background
The electric power system is an electric energy production and consumption system which consists of links such as a power plant, a power transmission and transformation line, a power supply and distribution station, power utilization and the like. The energy-saving power generation device has the function of converting primary energy in the nature into electric energy through the power generation power device, and then supplying the electric energy to each user through power transmission, power transformation and power distribution so as to provide electricity and heat required by life for the user. However, in remote areas, especially in pasturing areas, the herdsmen need to migrate from one pasture to another at a long distance every year, and the traditional heating mode is difficult to meet the requirements. The isolated network system can operate independently of the large power grid, and therefore, the isolated network system is generally adopted to provide electricity and heat required for life for people and herdsmen in remote areas who cannot access the power grid.
The Tibetan has been a great environmental research problem as an important ecological safety barrier in China, and the efficient development and utilization of clean energy has been a great problem. In recent years, with the gradual popularization of solar energy utilization technology and the great development potential of solar energy for environmental friendliness and no pollution, the utilization of solar energy for power generation or heating has become a hotspot of research on new energy in Tibet. However, the conventional photovoltaic power generation system has a weak disturbance bearing capacity, and due to the characteristics of low solar energy density, volatility, randomness and the like, the risk of operation of the isolated network system is increased, so that the problems of overcharge, overdischarge and overcharge of the energy storage system and the heat storage system are easily caused, the service life is shortened, and therefore, effective energy management has an extremely important significance.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides an energy management system based on supply is united with heat and electricity to family, through adding electric heat energy storage system on traditional photovoltaic power generation system's basis, form the energy management system that an energy ladder utilized, distribute photovoltaic cell module's output level and smooth to energy storage system and heat accumulation system, avoided energy storage system and heat accumulation system overcharge, cross the problem of holding and overdischarging, increase of service life, make the system safer, high-efficient, economy and reliable operation.
A household combined heat and power supply-based energy management system specifically comprises:
a central controller;
at least one group of photovoltaic cell assemblies;
the energy storage system is used for managing electric energy and comprises an energy storage battery and a battery management subsystem, wherein the energy storage battery is used for storing the electric energy;
a heat storage system for managing heat energy, including an electrothermal conversion device for converting electric energy into heat energy and storing the converted heat energy in a heat storage body;
the output end of the photovoltaic cell assembly is connected with the input end of the central controller, the output end of the central controller is respectively connected with the energy storage cell and the input end of the electric-heat conversion device, the output end of the electric-heat conversion device is connected with the heat accumulator, the central controller monitors the operation data of the photovoltaic cell assembly, the energy storage cell and the heat accumulator, and the working modes of the energy storage system and the heat accumulation system are switched according to the monitored operation data.
The utility model discloses in the application, energy management system based on the family is with central controller as the core, to photovoltaic cell subassembly, energy storage system and heat accumulation system carry out unified centralized control, real-time supervision photovoltaic cell subassembly, the operational data of energy storage battery and heat accumulator, according to the operational data switching energy storage system's of monitoring and heat accumulation system's mode of operation, can avoid energy storage battery and heat accumulator overcharge, the problem of overstock and overdischarge, increase of service life, make the system safer, high efficiency, economy and reliable operation, simultaneously can also the at utmost utilize solar energy resource.
Drawings
1. Fig. 1 is a schematic structural diagram of an energy management system based on combined heat and power supply for users according to an embodiment of the present invention.
Detailed Description
In order to make the understanding of the present invention more clear, the present invention provides an energy management system based on combined heat and power supply for users, which will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, the present invention provides an energy management system based on combined heat and power supply for users, which specifically includes:
the photovoltaic cell module, the energy storage system and the heat storage system are all connected with the central controller;
specifically, at least one group of photovoltaic cell modules is illustrated in fig. 1 by way of example, the photovoltaic cell modules may be formed by silicon solar cells using single crystal silicon as a substrate, and the rated output power and output voltage of each group of photovoltaic cell modules are determined according to actual application scenarios, so as to determine the number of solar cells forming the photovoltaic cell modules and the array of the photovoltaic cell modules. The photovoltaic cell assembly is used for directly converting solar energy into electric energy, is connected with the central controller and transmits the converted electric energy to the central controller.
An energy storage system for managing electric energy, including the energy storage battery that is used for storing electric energy, available common lead acid battery to and battery management subsystem, be used for real-time supervision the residual capacity value SOC of energy storage battery to give central controller with the SOC transmission who monitors, central controller's output with battery management subsystem connects, battery management subsystem with energy storage battery connects.
The heat storage system for managing heat energy comprises an electric-heat conversion device and a heat storage body, wherein the electric-heat conversion device is used for converting electric energy into heat energy, and specifically can adopt an electric heating device designed by the heat effect principle of current (namely, a phenomenon that the temperature of a conductor is increased when the current passes through various conductors) to convert the electric energy into internal energy; the electric-to-heat conversion device accumulates the converted heat energy in the heat accumulator, and the heat accumulator is mainly used for accumulating and storing the heat generated by the electric-to-heat conversion device, and for the purpose of ensuring the stability of the heating effect, for example, a heat storage tank, which is a heat storage device using water as a heat storage medium, can be adopted. The output end of the central controller is connected with the electric-heat conversion device, and the electric-heat conversion device is connected with the heat accumulator.
The central controller monitors the operation data of the photovoltaic cell assembly, the energy storage cell and the heat accumulator, and switches the working modes of the energy storage system and the heat accumulation system according to the monitored operation data so as to achieve the purpose of energy management; the electric energy transmitted by the photovoltaic cell assembly can be controlled by controlling the on-off state of each circuit.
For example, in an energy management system based on combined supply of heat and power for users provided by the embodiments of the present invention, the output end of the central controller is further connected to a DC load through a DC/DC converter, and/or connected to an ac load through an inverter, when monitoring the real-time power P of the user load1Then, the real-time power P is judged1Whether or not less than the preset power threshold P of the user loadmaxIn which P ismaxThe value of (b) can be set by the user according to the actual load demand. If P1＜PmaxWhen the battery is charged, the remaining capacity SOC value (State of charge) of the energy storage battery is read to reflect the remaining capacity of the battery, which is numerically defined as the ratio of the remaining capacity to the battery capacity, and is usually expressed as a percentage, the value range is 0-1, when the SOC is 0, the battery is completely discharged, and when the SOC is 1, the battery is completely charged), and the heat accumulator temperature t is readc(ii) a Judging the residual capacity SOC value of the energy storage battery and the minimum discharge residual capacity threshold SOC of the energy storage batteryminIf SOC is less than or equal to SOCminIf so, the central controller switches the energy storage system to be in a charging mode and controls to cut off a discharging switch of the energy storage battery so as to stop discharging the energy storage battery; otherwise, if SOC > SOCminAnd the central controller switches the energy storage system to be in a charging mode and controls and closes the discharge switch of the energy storage battery at the same time, so that the energy storage battery can supply power for a user load when the energy supply of the photovoltaic battery assembly is insufficient.
At SOC > SOCminIn this case, the method further includes:
judging the heat accumulator temperature tcAnd heating start temperature t0If t isc≤ t0If the central controller switches the heat storage system to be in the heat storage mode, the central controller controls a heat supply switch for cutting off the heat storage body at the same time, so that the heat storage body stops supplying heat to the user, otherwise, if t is the casec＞t0And if the central controller switches the heat storage system to be in a heat storage mode, and simultaneously controls a heat supply switch for closing the heat storage body, so that the heat storage body supplies heat to a user. And at tc＞t0In this case, the method further includes:
further judging the SOC of the energy storage battery and the starting threshold value SOC of the heat accumulatorXIf SOC is less than or equal to SOCxThe central controller switches the energy storage system to be in a charging mode and controls a discharging switch of the energy storage battery to be closed, so that when the photovoltaic cell assembly is short of energy supply, the energy storage battery can supply power for a user load, and simultaneously switches the heat storage system to be in a heat supply mode and controls the heat accumulator to stop heat storage;
otherwise if SOC > SOCxAnd then the central controller controls to switch the energy storage system to be in a charging mode and controls to close the discharge switch of the energy storage battery, so that when the energy supply of the photovoltaic cell assembly is insufficient, the energy storage battery can supply power for a user load, and simultaneously the heat storage system is switched to be in a heat storage mode.
At SOC > SOCxIn the case of (3), the heat storage temperature t is further determinedcAnd a maximum heat storage temperature threshold tmaxIf t isc≥tmaxIf the central controller controls a heat storage switch for cutting off the heat accumulator to stop heat storage of the heat accumulator, and switches the heat storage system to be in a heat supply mode at the same time, and judges the SOC of the energy storage battery and the maximum charging residual capacity threshold SOC of the energy storage batterymaxIf SOC is more than or equal to SOCmaxAnd then the central controller controls the energy storage battery to stop charging and controls the closing of the discharge switch of the energy storage battery, so that when the energy supply of the photovoltaic cell module is insufficient, the energy storage battery can supply power for a user load, and if the SOC is less than the SOCmaxThen return to the execution stepTemperature t of the heat storage bodycAnd heating start temperature t0The size between ";
when t isc＜tmaxThen, the SOC of the energy storage battery and the maximum charging residual capacity threshold SOC of the energy storage battery are judgedmaxIf SOC is more than or equal to SOCmaxAnd then the central controller controls the energy storage battery to stop charging and controls the closing of the discharge switch of the energy storage battery, so that when the energy supply of the photovoltaic cell module is insufficient, the energy storage battery can supply power for a user load, and if the SOC is less than the SOCmaxThen, the step returns to the step of judging the heat storage body temperature tcAnd heating start temperature t0The size between ".
To sum up, the embodiment of the utility model provides an use central controller as the core, to photovoltaic cell subassembly, energy storage system and heat accumulation system unify centralized control, according to energy storage battery SOC and actual user load power, the mode of energy storage system is switched in control, according to heat accumulator temperature and actual user heat load, the mode of heat accumulation system is switched in control, energy storage battery and heat accumulator overcharge have been avoided, the problem of overstock and overdischarge, increase of service life, make the system safer, high-efficient, economy and reliable operation, simultaneously can also the at utmost utilize solar energy resource.
Preferably, on the basis of the above embodiment, the utility model provides an energy management system based on user's combined heat and power supply still includes the heat dissipation end, the heat dissipation end with the heat accumulator is connected for user's heat supply, including circulating pump, heat exchanger and heat abstractor, wherein the heat abstractor includes at least one of following: fan coil, radiator and ground heating.
Preferably, on the basis of the above embodiment, the utility model provides an among the energy management system based on family is with combined supply of heat and electricity, energy storage battery and battery management subsystem that energy storage system includes, and electric heat conversion equipment and heat accumulator that heat accumulation system includes all adopt the modularized design, have reduced single device weight, and the dismouting and the transportation of the system of being convenient for reach safe, economic, high-efficient, reliable purpose.
The embodiments of the present invention have been described in detail, and the principles and embodiments of the present invention have been explained herein by using specific embodiments, and the above description of the embodiments is only used to help understand the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (5)
1. A combined heat and power supply-based energy management system for a user, comprising:
a central controller;
at least one group of photovoltaic cell assemblies;
the energy storage system is used for managing electric energy and comprises an energy storage battery and a battery management subsystem, wherein the energy storage battery is used for storing the electric energy;
a heat storage system for managing heat energy, including an electrothermal conversion device for converting electric energy into heat energy and storing the converted heat energy in a heat storage body;
the output end of the photovoltaic cell assembly is connected with the input end of the central controller, the output end of the central controller is respectively connected with the energy storage cell and the input end of the electric-heat conversion device, the output end of the electric-heat conversion device is connected with the heat accumulator, the central controller monitors the operation data of the photovoltaic cell assembly, the energy storage cell and the heat accumulator, and the working modes of the energy storage system and the heat accumulation system are switched according to the monitored operation data.
2. The combined heat and power supply-based energy management system for users according to claim 1, wherein the output of the central controller is further connected to a direct current load through a DC/DC converter and/or to an alternating current load through an inverter.
3. The combined heat and power supply-based energy management system for a user of claim 1, further comprising a heat sink tip coupled to the thermal mass.
4. The combined heat and power supply-based energy management system for a user of claim 3, wherein the heat sink end comprises a circulation pump, a heat exchanger, and a heat sink.
5. The combined heat and power supply-based energy management system for a user of claim 4, wherein the heat sink comprises at least one of: fan coil, radiator and ground heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022090908.XU CN212486186U (en) | 2020-09-22 | 2020-09-22 | Energy management system based on household combined heat and power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022090908.XU CN212486186U (en) | 2020-09-22 | 2020-09-22 | Energy management system based on household combined heat and power supply |
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| Publication Number | Publication Date |
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| CN212486186U true CN212486186U (en) | 2021-02-05 |
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| CN202022090908.XU Active CN212486186U (en) | 2020-09-22 | 2020-09-22 | Energy management system based on household combined heat and power supply |
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| CN (1) | CN212486186U (en) |
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- 2020-09-22 CN CN202022090908.XU patent/CN212486186U/en active Active
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