CN110098626A - One kind is based on thermo-electric generation and modular powersupply system and its operation method - Google Patents
One kind is based on thermo-electric generation and modular powersupply system and its operation method Download PDFInfo
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- CN110098626A CN110098626A CN201910515153.2A CN201910515153A CN110098626A CN 110098626 A CN110098626 A CN 110098626A CN 201910515153 A CN201910515153 A CN 201910515153A CN 110098626 A CN110098626 A CN 110098626A
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000010248 power generation Methods 0.000 claims abstract description 112
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 230000005611 electricity Effects 0.000 claims description 33
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 238000012544 monitoring process Methods 0.000 claims description 7
- 238000003491 array Methods 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 3
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- 230000009286 beneficial effect Effects 0.000 description 1
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Classifications
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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
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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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
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
-
- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/32—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from a charging set comprising a non-electric prime mover rotating at constant speed
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N11/00—Generators or motors not provided for elsewhere; Alleged perpetua mobilia obtained by electric or magnetic means
- H02N11/002—Generators
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The present invention relates to thermo-electric generations and power supply power supply technical field, it is proposed one kind based on thermo-electric generation and modular powersupply system and its operation method, the multiple groups voltage balance circuit to connect one to one including multiple groups temperature-difference power generation module, with every group of temperature-difference power generation module, the series-parallel initialization circuit, the battery module, control platform that are connect respectively with multiple groups voltage balance circuit, the following steps are included: detecting the output voltage and electric current and DC bus-bar voltage U of each temperature-difference power generation module；If DC bus-bar voltage U is lower than the range of nominal tension, controls battery and discharge to DC bus；If DC bus-bar voltage U is higher than the range of nominal tension, controls temperature-difference power generation module and charge to battery, be reduced to DC bus-bar voltage U in the range of nominal tension.The present invention compensates for the lower and unstable defect of single thermoelectric generation film generated energy using the serial or parallel connection conversion regime between each temperature-difference power generation module.
Description
Technical field
The present invention relates to thermo-electric generations and power supply power supply technical field, in particular to a kind of to be based on thermo-electric generation and modularization
Powersupply system and its operation method.
Background technique
In remote districts, the small devices such as sensor, instrument, monitoring system, signal lamp of work need stable power supply electricity
Source could work normally, however, influenced by region is remote, above-mentioned electrical equipment, which is difficult to be connected to power grid, obtains electric energy.Mesh
Before, generally the equipment of above-mentioned remote districts is powered using wind-power electricity generation, photovoltaic power generation, dry cell etc., but wind-force is sent out
Electricity has stronger unstability, and photovoltaic power generation apparatus cannot be run at night, and the capacity of dry cell is limited, needs periodically more
It changes, therefore has certain limitation.
Thermoelectric generation film is a kind of novel power generation original part, and front and back when thermoelectric generation film has certain temperature difference
When, the port of thermoelectric generation film will form voltage, and export certain electric current, therefore set using thermo-electric generation is not from far-off regions
It is standby to be powered, it is a kind of new power supply thinking.But for individual thermoelectric generation film when being generated electricity, there is also certain limitations
Property, firstly, thermoelectric generation film, in the environment of high temperature difference, generated energy is more, and generated energy is less in the environment of Low Temperature Difference.Separately
Outside, thermoelectric generation film is larger using the limitation in field, and when powering in such a way that the multi-disc temperature difference is series-parallel, due to difference
The voltage of the output port of thermoelectric generation film does not have to, and circulation etc. is be easy to cause to adversely affect, the limitation of above-mentioned thermoelectric generation film,
Greatly limit practical application of the thermo-electric generation in power supply.
Summary of the invention
It is an object of the invention to improve the deficiency in the presence of the prior art, provide a kind of based on thermo-electric generation and module
The powersupply system and its operation method of change, using modularized design, control platform passes through the operation to each module and circuit
State carries out real-time monitoring, controls the switch combination in series-parallel initialization circuit, realizes conversion multiple groups thermo-electric generation mould
The connection in parallel or series of block, so that each section forms one by effectively cooperation and control in the powersupply system
A close organic whole of connection, is load stable power-supplying.
In order to achieve the above-mentioned object of the invention, the embodiment of the invention provides following technical schemes:
One kind is load input power, packet using DC bus based on thermo-electric generation and modular powersupply system
It includes:
When multiple groups temperature-difference power generation module, every group of temperature-difference power generation module front and back have the temperature difference, temperature-difference power generation module
Port output voltage and electric current；
The multiple groups voltage balance circuit to connect one to one with every group of temperature-difference power generation module, for temperature-difference power generation module
Output port voltage carries out equilibrium, so that the port output voltage of each temperature-difference power generation module is consistent；Electric voltage equalization described in multiple groups
The output end of circuit is incorporated to DC bus；
The series-parallel initialization circuit being connect respectively with multiple groups voltage balance circuit, for realizing each group temperature-difference power generation module it
Between series/parallel connection and conversion；
The battery module connecting respectively with multiple groups voltage balance circuit, is made of battery and its charge-discharge circuit, uses
In discharging to DC bus or receiving the power supply of temperature-difference power generation module, the power that DC bus is exported is balanced；
Control platform, for detecting the voltage of every group of temperature-difference power generation module output and the voltage of DC bus, and monitoring
The operating status of temperature-difference power generation module, voltage balance circuit, series-parallel initialization circuit, battery module.
Further, in order to preferably realize the present invention, temperature-difference power generation module described in every group includes even number thermo-electric generation
Piece, even number thermoelectric generation film are divided into two groups of generator units, wherein the output end of the thermoelectric generation film in every group of generator unit
For mouth to be connected in series, the output port of two groups of generator units is to be connected in parallel.
Further, in order to preferably realize the present invention, voltage balance circuit described in every group include LM317 voltage-stablizer and its
Peripheral circuit, the peripheral circuit include and the concatenated resistance R1 of the temperature-difference power generation module and concatenated resistance R2 of LM317 voltage-stablizer.
Further, in order to preferably realize the present invention, the series-parallel initialization circuit is opening for multiple relays composition
Close array.
It further, include that one or more groups of redundancies are sent out in order to preferably realize the present invention, in multiple groups temperature-difference power generation module
Electric module.
Further, in order to preferably realize that the present invention, the control platform include single-chip computer and its peripheral circuit, this is outer
Enclosing circuit includes the reset circuit, clock circuit, memory connecting respectively with single-chip microcontroller.
A kind of operation method based on thermo-electric generation Yu modular powersupply system, comprising the following steps:
It detects the output voltage of each temperature-difference power generation module and exports electric current and DC bus-bar voltage U；
If in the DC bus-bar voltage U no longer range of nominal tension, and being lower than voltage rating lower limit UN2, then control battery to
DC bus electric discharge, is promoted to DC bus-bar voltage U in the range of nominal tension；
If DC bus-bar voltage U is higher than voltage rating upper limit U not in the range of nominal tensionN1, then thermo-electric generation is controlled
Module charges to battery, is reduced to DC bus-bar voltage U in the range of nominal tension.
Further, in order to preferably realize the present invention, if in the DC bus-bar voltage U no longer range of nominal tension,
And it is lower than voltage rating lower limit UN2, then control battery and discharge to DC bus, DC bus-bar voltage U is made to be promoted to voltage rating
Step in range, comprising:
If DC bus-bar voltage U is lower than voltage rating lower limit U not in the range of nominal tensionN2, by each thermo-electric generation mould
Connection type between block is converted to parallel connection by parallel connection, or/and redundancy electricity generation module is made to be incorporated to temperature-difference power generation module, promotes the temperature difference
The output voltage of electricity generation module, to promote DC bus-bar voltage U；
If DC bus-bar voltage U is still below voltage rating lower limit UN2, then control battery and discharge to DC bus, so that directly
Stream busbar voltage U restores to the range of nominal tension.
Further, in order to preferably realize the present invention, if the DC bus-bar voltage U not in the range of nominal tension,
And it is higher than voltage rating upper limit UN1, then control temperature-difference power generation module and charge to battery, be reduced to DC bus-bar voltage U specified
Step in voltage range, comprising:
If DC bus-bar voltage U is higher than voltage rating upper limit U not in the range of nominal tensionN1, removal redundancy power generation mould
Block, or/and the connection type between each temperature-difference power generation module is converted into series connection by parallel connection, reduce the output of temperature-difference power generation module
Voltage, to reduce DC bus-bar voltage U；
If DC bus-bar voltage U is still higher than voltage rating upper limit UN1, then control temperature-difference power generation module and charge to battery, make
DC bus-bar voltage U is obtained to restore to the range of nominal tension.
Compared with prior art, beneficial effects of the present invention:
(1) present invention compensates for the single temperature difference using the serial or parallel connection conversion regime between each temperature-difference power generation module
The lower and unstable defect of power generation sheet generated energy, the especially extremely low limitation of the generated energy under Low Temperature Difference environment；
(2) present invention controls the working condition of battery module using control platform, solves thermo-electric generation mould
Block output port is unstable, there are problems that circulation, Generation Side and electricity consumption side unbalanced power, so that modular in the present invention
Powersupply system can be organically integrated into a whole, to stablize for load, continue, reliable power supply；
(3) present invention is suitable for the load of the various different capacity systems in remote districts, can be used as general in power supply system
Type shortens the R&D cycle, improves operational reliability, reduces manufacturing cost.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the structural schematic diagram of powersupply system of the present invention；
Fig. 2 is voltage balance circuit schematic diagram of the present invention；
Fig. 3 is the operation method flow chart of specifically powersupply system of the embodiment of the present invention.
Specific embodiment
Below in conjunction with attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Usually exist
The component of the embodiment of the present invention described and illustrated in attached drawing can be arranged and be designed with a variety of different configurations herein.Cause
This, is not intended to limit claimed invention to the detailed description of the embodiment of the present invention provided in the accompanying drawings below
Range, but it is merely representative of selected embodiment of the invention.Based on the embodiment of the present invention, those skilled in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
The present invention is achieved through the following technical solutions, as shown in Figure 1, a kind of based on thermo-electric generation and modular power supply electricity
Source system is powered for load, comprising: multiple groups temperature-difference power generation module, the multiple groups to connect one to one with multiple groups temperature-difference power generation module
Voltage balance circuit, the series-parallel initialization circuit being connect respectively with multiple groups voltage balance circuit, battery module, control platform.
The present invention uses modularized design, and control platform passes through to temperature-difference power generation module, voltage balance circuit, string in powersupply system
Initialization circuit in parallel, battery module operating status carry out real-time monitoring, and detect the output electricity of each temperature-difference power generation module
The voltage U of pressure and DC bus, controls the switch combination in series-parallel initialization circuit, realizes conversion multiple groups temperature difference hair
The connection in parallel or series of electric module, so that each section passes through effectively cooperation and control, shape in the powersupply system
At a close organic whole of connection, continually and steadily power for load.
It further, include that N group temperature-difference power generation module and one or more groups of redundancies generate electricity in multiple groups temperature-difference power generation module
The structure and function of module, temperature-difference power generation module and redundancy electricity generation module is all the same, is referred to as temperature-difference power generation module hereinafter.According to
The different load of powersupply system connection, can calculate separately out the quantity N of temperature-difference power generation module required for load, normal
In the case where, N number of temperature-difference power generation module can satisfy the demand to load normal power supply, i.e. DC bus is exported to the electricity of load
It is pressed in the range of nominal tension, it is contemplated that the situation that the influence of environmental factor or some temperature-difference power generation module may be destroyed
Under, one or more redundancy electricity generation modules are equipped with as backup, and the power of powersupply system output can be replenished in time.
Thermo-electric generation described in every group do not have module it is front and back in the environment with the temperature difference when, temperature-difference power generation module
It port i.e. can output voltage and electric current.Temperature-difference power generation module described in every group includes even number thermoelectric generation film, by the even number temperature difference
Power generation sheet is divided into two groups of generator units, wherein the output port of the thermoelectric generation film in every group of generator unit is to be connected in series,
The output port of two groups of generator units is to be connected in parallel.
Preferably, each temperature-difference power generation module in the present embodiment selects four plate thermo-electric generation pieces, two of them temperature difference hair
The output port of electric piece is to be connected in series to form one group of thermo-electric generation unit, improves output voltage in series, in addition two
The output port of a thermoelectric generation film is also to be connected in series to form one group of thermo-electric generation unit, the output of two groups of thermo-electric generation units
Port is to be connected in parallel, and the output voltage by the temperature-difference power generation module combined in series and parallel is after four thermoelectric generation films are connected
Twice of the output voltage of temperature-difference power generation module.
Further, in actual application, according to the actual temperature state and load sheet of environment where load
The electric power situation of body sets the quantity N of temperature-difference power generation module, and these temperature-difference power generation modules is connected in parallel or series
It connects, with supply voltage and electric current needed for reaching load.However, uneven, the thermoelectric generation film characteristic by temperature difference condition in environment
The output voltage of inconsistent influence, every group of temperature-difference power generation module is inconsistent, if these temperature-difference power generation modules are directly parallel in
Together, then it is easy to generate biggish circulation between different temperature-difference power generation modules, i.e., electric current will be from the thermo-electric generation mould of high potential
Block flows into the temperature-difference power generation module of ground potential, to influence the efficiency of power generation and the safety of device.Therefore, electric voltage equalization is added
Circuit, voltage balance circuit described in every group includes LM317 voltage-stablizer and its peripheral circuit, by resistance in voltage balance circuit
R1, resistance R2 resistance value set so that the output port voltage of each temperature-difference power generation module is consistent and stablizes, i.e., when the temperature difference is sent out
When the output voltage of electric module fluctuates, by the output voltage stabilization of voltage balance circuit to a unified voltage, from
And make the output voltage of each temperature-difference power generation module balanced.As shown in Fig. 2, wherein the peripheral circuit of LM317 voltage-stablizer includes
Capacitor C1, capacitor C2, resistance R1, resistance R2, diode D1, temperature-difference power generation module, one end of capacitor C1, diode D1 cathode
It being connect with the input terminal of LM317 voltage-stablizer, the ground terminal of LM317 is connect with one end of one end of resistance R1, resistance R2 respectively,
The output end of LM317 is connect with one end of the other end of resistance R2, capacitor C2 respectively, the other end, the diode of the capacitor C1
The anode of D2, the other end of resistance R1, capacitor C2 the other end be grounded.
Further, the series-parallel initialization circuit includes the multiple groups relay to connect one to one with voltage balance circuit
Device switch arrays, every group relay switch arrays include that internal switch one (being indicated in Fig. 1 with n1), switch two (use n2 in Fig. 1
Indicate) and it is connected to switch three (being indicated in Fig. 1 with Sn) between each group voltage balance circuit.Relay switch array receives
The control signal of control platform forms a variety of different switch combinations, realizes the series/parallel between each group temperature-difference power generation module
Connection and conversion, to improve the voltage and electric current that temperature-difference power generation module exports in the low environment of the temperature difference.
Further, the control platform is the control system of single-chip computer and its peripheral circuit composition, is detected each
The output voltage and output electric current of temperature-difference power generation module, to judge the output power of each temperature-difference power generation module.In single-chip microcontroller
The operation algorithm of middle built-in module is monitored and controls to the operating status of entire powersupply system, specifically includes control
It makes the switch combination of series-parallel initialization circuit, judge whether redundancy electricity generation module is incorporated to operation, monitoring and control battery module
Working condition so that powersupply system is steadily powered for load.
Based on above-mentioned thermo-electric generation and modular powersupply system, its operation method, specifically, Yi Zhongji are proposed
In the operation method of thermo-electric generation and modular powersupply system, when being powered using temperature-difference power generation module to load,
With the running environment real-time change of load, the temperature difference in the actual motion environment of temperature-difference power generation module also real-time change, every group
The output voltage of temperature-difference power generation module accesses in a DC bus, and DC bus is connected with zener diode D2.Work as temperature
When the temperature difference front and back of poor power generation sheet is smaller, the output voltage of every group of temperature-difference power generation module can only be stablized in lower electricity
In voltage levels, it is thus possible to cause the voltage U of DC bus in powersupply system not in the permission upper limit U of voltage ratingN1With
Allow lower limit UN1Between.
It should be noted that the voltage U of DC bus is voltage of the powersupply system to load, for different loads
There is the different ranges of nominal tension, therefore DC bus-bar voltage U needs to control in specified voltage range.
When the power of temperature-difference power generation module output is less than load power, the power of DC bus output is less than load function
Rate, similarly, when the power of temperature-difference power generation module output is greater than load power, the power of DC bus output is greater than load function
Rate, it is therefore desirable to battery module is added, charge and discharge are carried out to it, plays the role of balancing DC bus output power, thus
The power that stable power-supplying power-supply system exports load.
As shown in figure 3, detecting the output voltage of each temperature-difference power generation module and exporting electric current and DC bus-bar voltage U；
If in the DC bus-bar voltage U no longer range of nominal tension, and being lower than voltage rating lower limit UN2, then battery is controlled to DC bus
Electric discharge, is promoted to DC bus-bar voltage U in the range of nominal tension；If DC bus-bar voltage U not in the range of nominal tension, and
Higher than voltage rating upper limit UN1, then control temperature-difference power generation module and charge to battery, DC bus-bar voltage U is made to be reduced to specified electricity
It presses in range.
Specifically, powersupply system may be unstable for the power in extreme environment, exported at this time, DC bus
Voltage U may not be able to be in the range of nominal tension.As shown in figure 3, when DC bus-bar voltage U allows lower limit U lower than voltage ratingN2
When, control platform sends control signal to relay switch in series-parallel initialization circuit first, so that adjacent thermo-electric generation mould
The module that is connected in parallel of block is converted to series connected mode.According to Conventional wisdom it is found that series voltage is greater than electricity in parallel in circuit
Pressure, the mode for controlling series-parallel initialization circuit to control platform are illustrated, as shown in Figure 1, it is assumed that only thermo-electric generation
Module 1 and temperature-difference power generation module 2 close the closure of switch 11, the closure of switch 12, switch 21 under the control signal of control platform
It closes, the graduation of switch 22, switch S1 disconnection, temperature-difference power generation module 1 and temperature-difference power generation module 2 are connected in parallel at this time, work as thermo-electric generation
When the voltage U of module 1 and the output of temperature-difference power generation module 2 into DC bus is lower, then need to make temperature-difference power generation module 1 and the temperature difference
Electricity generation module 2 is connected in series, and control platform sends new control program to series-parallel initialization circuit at this time, in the work of control signal
Under, the closure of switch 11, switch 12 are disconnected, switch 21 disconnects, the closure of switch 22, switch S1 closure, at this time temperature-difference power generation module 1
It is connected in series with temperature-difference power generation module 2, then the voltage of temperature-difference power generation module output increases, to promote DC bus-bar voltage U.
If after being all converted to series connected mode between all temperature-difference power generation modules, the voltage U of output to DC bus is still
Lower than voltage rating lower limit UN2, then spare redundancy electricity generation module is incorporated to temperature-difference power generation module by control platform, and is sent out with the temperature difference
The connection of electric block coupled in series, be specifically incorporated to the quantity of redundancy electricity generation module as needed for actual load the case where power depending on, in this way, i.e.
The voltage U of DC bus can be continued to lift up, to improve the power that powersupply system provides load.
If all standby redundancy electricity generation modules are all connected after access temperature-difference power generation module, DC bus-bar voltage U is still low
In lower voltage limit UN2, then in battery voltage USHigher than battery discharge voltage threshold value USN1In the case where, i.e. accumulator electric-quantity
When sufficient, control platform controls battery and discharges to DC bus, supplements insufficient energy in DC bus, keeps DC bus electric
It presses U to be promoted to restore to UN1With UN2Between, thus the power that stable power-supplying power-supply system provides load.
It should be noted that when DC bus-bar voltage U allows lower limit U lower than voltage ratingN2When, it will be in temperature-difference power generation module
The mode of being connected in parallel is converted into series connected mode, and is incorporated to redundancy electricity generation module two ways sequence in no particular order, can also be with
Carry out simultaneously, according to the actual situation depending on, as shown in figure 3, it is preferred that first convert series connected mode for the mode of being connected in parallel, then
It is incorporated to redundancy electricity generation module.Note that control battery is that DC bus powered mode should rise electric mode not at aforementioned two kinds
It can restore use when in DC bus-bar voltage U to the range of nominal tension, subtract because the service life of battery increases with access times
It is few, the service life of battery can be improved as far as possible in this way.
As shown in figure 3, allowing upper limit U when DC bus-bar voltage U is higher than voltage ratingN1When, stop battery-operated first,
It disconnects battery to discharge to DC bus, if DC bus-bar voltage U is still higher than voltage rating permission upper limit U at this timeN1, then first
The mode of being connected in parallel is converted to except de-redundancy electricity generation module, then by the series connected mode in temperature-difference power generation module, it is straight to reduce
Galvanic electricity presses U, to reduce the power that powersupply system provides load.
If the voltage of control platform detection temperature-difference power generation module output still has a margin, i.e., direct current is female after aforesaid operations
The voltage of line U, which is still higher than voltage rating, allows upper limit UN1, then in battery voltage USLower than its charging voltage threshold value USN2When, control
Platform courses temperature-difference power generation module processed charges to battery, is discharged with reducing to DC bus, so that the voltage U of DC bus is low
Allow upper limit U in voltage ratingN1, restore to UN1And UN2Between, thus the power that stable power-supplying power-supply system provides load.
It should be noted that allowing upper limit U when DC bus-bar voltage U is higher than voltage ratingN1When, it needs to disconnect battery first
It discharges to DC bus, secondly removes de-redundancy electricity generation module, and the series connected mode in temperature-difference power generation module is converted to simultaneously
Join both modes of connection mode sequence in no particular order, can carry out simultaneously, can also only select a kind of mode to carry out, as long as energy
Reaching reduces in DC bus-bar voltage U to the range of nominal tension.As shown in figure 3, it is preferred that first remove de-redundancy electricity generation module, then
Series connected mode in temperature-difference power generation module is converted into the mode of being connected in parallel.
In conclusion one kind proposed by the present invention is based on thermo-electric generation and modular powersupply system and its operation side
Temperature-difference power generation module is configured to array format by method, and using voltage balance circuit to the output end of every group of temperature-difference power generation module
Mouth voltage carries out equilibrium, then under the monitoring of control platform, if DC bus-bar voltage U is controlled not in the range of nominal tension
The working condition of platform courses battery module processed, and the serial or parallel connection mode between each temperature-difference power generation module is carried out
Setting, and then DC bus-bar voltage U is controlled, make it in specified voltage range, can steadily power to load.
The present invention compensates for single thermo-electric generation using the serial or parallel connection conversion regime between each temperature-difference power generation module
The lower and unstable defect of piece generated energy, the especially extremely low limitation of the generated energy under Low Temperature Difference environment；Using control
Platform controls the working condition of battery module, solve temperature-difference power generation module output port it is unstable, there are circulation,
The problem of Generation Side and electricity consumption side unbalanced power, modular powersupply system in the present invention is organically combined
For an entirety, to stablize for load, continue, reliable power supply；And the present invention is suitable for the various differences in remote districts
The load of power system can be used as universal in power supply system, the shortening R&D cycle, improve operational reliability, reduction manufacture
Cost.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
- It the use of DC bus is load input power 1. one kind is based on thermo-electric generation and modular powersupply system, it is special Sign is: including:When multiple groups temperature-difference power generation module, every group of temperature-difference power generation module front and back have the temperature difference, the end of temperature-difference power generation module Mouth output voltage and electric current；The multiple groups voltage balance circuit to connect one to one with every group of temperature-difference power generation module, for the output to temperature-difference power generation module Port voltage carries out equilibrium, so that the port output voltage of each temperature-difference power generation module is consistent；Voltage balance circuit described in multiple groups Output end be incorporated to DC bus；The series-parallel initialization circuit being connect respectively with multiple groups voltage balance circuit, for realizing between each group temperature-difference power generation module The connection and conversion of series/parallel；The battery module connecting respectively with multiple groups voltage balance circuit, is made of battery and its charge-discharge circuit, for DC bus electric discharge or the power supply for receiving temperature-difference power generation module, the power that DC bus is exported balance；Control platform, for detecting the voltage of every group of temperature-difference power generation module output and the voltage of DC bus, and the monitoring temperature difference The operating status of electricity generation module, voltage balance circuit, series-parallel initialization circuit, battery module.
- 2. system according to claim 1, it is characterised in that: temperature-difference power generation module described in every group includes even number temperature difference hair Electric piece, even number thermoelectric generation film are divided into two groups of generator units, wherein the output of the thermoelectric generation film in every group of generator unit Port is to be connected in series, and the output port of two groups of generator units is to be connected in parallel.
- 3. system according to claim 1, it is characterised in that: voltage balance circuit described in every group includes LM317 voltage-stablizer And its peripheral circuit, the peripheral circuit include and the concatenated resistance R1 of temperature-difference power generation module and the concatenated resistance of LM317 voltage-stablizer R2。
- 4. system according to claim 1, it is characterised in that: the series-parallel initialization circuit is multiple relays composition Switch arrays.
- 5. system according to claim 1-4, it is characterised in that: in multiple groups temperature-difference power generation module include one group or Multiple groups redundancy electricity generation module.
- 6. system according to claim 1, it is characterised in that: the control platform includes single-chip computer and its peripheral circuit, The peripheral circuit includes the reset circuit, clock circuit, memory connecting respectively with single-chip microcontroller.
- 7. a kind of operation method based on thermo-electric generation Yu modular powersupply system according to claim 1, It is characterized in that: the following steps are included:It detects the output voltage of each temperature-difference power generation module and exports electric current and DC bus-bar voltage U；If in the DC bus-bar voltage U no longer range of nominal tension, and being lower than voltage rating lower limit UN2, then battery is controlled to direct current Bus discharge is promoted to DC bus-bar voltage U in the range of nominal tension；If DC bus-bar voltage U is higher than voltage rating upper limit U not in the range of nominal tensionN1, then temperature-difference power generation module is controlled It charges to battery, is reduced to DC bus-bar voltage U in the range of nominal tension.
- 8. if according to the method described in claim 7, the it is characterized by: DC bus-bar voltage U no longer range of nominal tension It is interior, and it is lower than voltage rating lower limit UN2, then control battery and discharge to DC bus, be promoted to DC bus-bar voltage U specified Step in voltage range, comprising:If DC bus-bar voltage U is lower than voltage rating lower limit U not in the range of nominal tensionN2, by each temperature-difference power generation module it Between connection type parallel connection is converted to by parallel connection, or/and redundancy electricity generation module is made to be incorporated to temperature-difference power generation module, promotes thermo-electric generation The output voltage of module, to promote DC bus-bar voltage U；If DC bus-bar voltage U is still below voltage rating lower limit UN2, then control battery and discharge to DC bus, so that direct current is female Line voltage U restores to the range of nominal tension.
- 9. according to the method described in claim 7, it is characterized by: if the DC bus-bar voltage U is not in the range of nominal tension It is interior, and it is higher than voltage rating upper limit UN1, then control temperature-difference power generation module and charge to battery, be reduced to DC bus-bar voltage U Step in the range of nominal tension, comprising:If DC bus-bar voltage U is higher than voltage rating upper limit U not in the range of nominal tensionN1, redundancy electricity generation module is removed, Or/and the connection type between each temperature-difference power generation module is converted into series connection by parallel connection, reduce the output electricity of temperature-difference power generation module Pressure, to reduce DC bus-bar voltage U；If DC bus-bar voltage U is still higher than voltage rating upper limit UN1, then control temperature-difference power generation module and charge to battery, so that directly Stream busbar voltage U restores to the range of nominal tension.
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