CN208849469U - Photovoltaic access capacity determining device - Google Patents

Photovoltaic access capacity determining device Download PDF

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Publication number
CN208849469U
CN208849469U CN201821387925.6U CN201821387925U CN208849469U CN 208849469 U CN208849469 U CN 208849469U CN 201821387925 U CN201821387925 U CN 201821387925U CN 208849469 U CN208849469 U CN 208849469U
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China
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photovoltaic
output end
input terminal
module
determining module
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CN201821387925.6U
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Inventor
胡诗尧
韩璟琳
翟广心
孙鹏飞
安佳坤
李振伟
邵华
贺春光
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State Grid Corp of China SGCC
State Grid Hebei Electric Power Co Ltd
Economic and Technological Research Institute of State Grid Hebei Electric Power Co Ltd
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State Grid Corp of China SGCC
State Grid Hebei Electric Power Co Ltd
Economic and Technological Research Institute of State Grid Hebei Electric Power Co Ltd
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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
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers

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Abstract

The utility model is suitable for renewable energy power generation technical field, provide a kind of photovoltaic access capacity determining device, comprising: data acquisition module, photovoltaic residue access capacity a reference value determining module, voltage correction factor determining module, photovoltaic power coefficient determination module and real surplus capacity determining module；The input terminal and output end of the photovoltaic residue access capacity a reference value determining module are connected with data acquisition module and real surplus capacity determining module respectively；The input terminal and output end of the voltage correction factor determining module are connected with data acquisition module and real surplus capacity determining module respectively；The input terminal and output end of the photovoltaic power coefficient determination module are connected with data acquisition module and real surplus capacity determining module respectively, above-mentioned apparatus can be acquired according to access point electrical appliance state parameter real-time perfoming data and be calculated with residual capacity, it avoids relying in historical data, while more intuitive opinion can be provided for the calculating of remaining access photovoltaic capacity.

Description

Photovoltaic access capacity determining device
Technical field
The utility model belongs to renewable energy power generation technical field more particularly to a kind of photovoltaic access capacity determines dress It sets.
Background technique
With the increasingly increase of energy crisis and environmental protection pressure, renewable energy is increasingly valued by people. Solar power generation is a kind of generation mode that solar energy is directly translated into electric energy, then solar energy power generating is accessed distribution Net can be realized the clean and environmental protection and energy efficiency of power distribution network, and power distribution network is made to carry out distributed power generation.But due to the light of the sun According to certain randomness and intermittence, this brings certain challenge for the planning of power distribution network.Therefore, it is necessary to access The photovoltaic capacity of power distribution network is studied.
However, the determination of existing photovoltaic distributed generation resource access low voltage electric network capacity tends to rely on historical data, it is corresponding The method of the node of the selected access of user lacks specific aim, and user is difficult to obtain network parameter and calculate according to existing mathematical model Parameter, it is difficult to which quantization is implemented.
Utility model content
In view of this, the utility model embodiment provides photovoltaic access capacity determining device, to solve in the prior art The determination of access electrical network capacity tends to rely on historical data, and user is difficult to obtain network parameter and meter according to existing mathematical model Calculate parameter, it is difficult to the problem of quantization is implemented.
The utility model embodiment provides a kind of photovoltaic access capacity determining device, comprising: data acquisition module, photovoltaic Remaining access capacity a reference value determining module, voltage correction factor determining module, photovoltaic power coefficient determination module and reality Residual capacity determining module；
The input terminal of the photovoltaic residue access capacity a reference value determining module is connected with the output end of data acquisition module, The output end of the photovoltaic residue access capacity a reference value determining module is connected with the input terminal of real surplus capacity determining module； The input terminal of the voltage correction factor determining module is connected with the output end of data acquisition module, and the voltage correction factor is true The output end of cover half block is connected with the input terminal of real surplus capacity determining module；The photovoltaic power coefficient determination module it is defeated Enter end to be connected with the output end of data acquisition module, the output end and real surplus capacity of the photovoltaic power coefficient determination module The input terminal of determining module is connected.
Optionally, the data acquisition module includes: electric energy computation chip, control unit and memory；
The input terminal of the electric energy computation chip is connected with external voltage transformer and current transformer；The control is single The input terminal of member is connected with the output end of electric energy computation chip；The output end phase of the input terminal of the memory and control unit Even；
The output end of the memory is connected with the input terminal of the photovoltaic residue access capacity a reference value determining module；Institute The output end for stating memory is connected with the input terminal of the voltage correction factor determining module；The output of the electric energy computation chip End is connected with the input terminal of the photovoltaic power coefficient determination module.
Optionally, described control unit includes: the first maximizing circuit, comparator and switching circuit；
The input terminal of the first maximizing circuit is connected with the output end of electric energy computation chip；The comparator it is defeated Enter end to be connected with the output end of the first maximizing circuit, output of the input terminal of the comparator also with the memory End is connected；The input terminal of the switching circuit is connected with the output end of the comparator, and the input terminal of the switching circuit is also logical Data/address bus is crossed to be connected with the output end of the output end of the electric energy computation chip and the first maximizing circuit；It is described The output end of switching circuit is connected with the input terminal of the memory.
Optionally, the photovoltaic residue access capacity a reference value determining module includes: adder and the first subtracter；
The input terminal of the adder is connected with the output end of the data acquisition module；The input of first subtracter End is connected with the output end of the adder；The output end of first subtracter and the real surplus capacity determining module Input terminal is connected.
Optionally, the voltage correction factor determining module includes: the second subtracter and the first divider；
The input terminal of second subtracter is connected with the output end of the data acquisition module；First divider Input terminal is connected with the output end of second subtracter；The output end of first divider and the real surplus capacity are true The input terminal of cover half block is connected.
Optionally, the photovoltaic power coefficient determination module includes: the real-time maximum power acquiring unit of photovoltaic module, photovoltaic Component theoretical maximum power obtaining unit and photovoltaic power factor determination unit；
The output end phase of the input terminal of the photovoltaic module theoretical maximum power obtaining unit and the data acquisition module Even；The input terminal of the photovoltaic power factor determination unit and the output end of the real-time maximum power acquiring unit of the photovoltaic module It is connected, the input terminal of the photovoltaic power factor determination unit is also defeated with the photovoltaic module theoretical maximum power obtaining unit Outlet is connected；The input terminal phase of the output end of the photovoltaic power factor determination unit and the real surplus capacity determining module Even.
Optionally, the real-time maximum power acquiring unit of the photovoltaic module includes: photovoltaic module, MPPT maximum power point tracking control Device, photovoltaic DC-to-AC converter and the first multiplier processed；
The input terminal of the MPPT maximum power point tracking controller is connected with the output end of the photovoltaic module；The photovoltaic is inverse The input terminal for becoming device is connected with the output end of the MPPT maximum power point tracking controller；The input terminal of first multiplier and institute The output end for stating photovoltaic DC-to-AC converter is connected；The output end of first multiplier is defeated with the photovoltaic power factor determination unit Enter end to be connected.
Optionally, the photovoltaic module theoretical maximum power obtaining unit includes: clock chip, the second maximizing circuit With photovoltaic maximum output memory；
The input terminal of the second maximizing circuit is connected with the output end of the data acquisition module；The photovoltaic is most The input terminal of big output storage is connected with the output end of the clock chip, the input terminal of the photovoltaic maximum output memory Also it is connected with the output end of the second maximizing circuit；The output end and the photovoltaic of the photovoltaic maximum output memory The input terminal of power coefficient determination unit is connected.
Optionally, the photovoltaic power factor determination unit includes: the second divider；
The input terminal of second divider is connected with the output end of the real-time maximum power acquiring unit of the photovoltaic module, The input terminal of second divider is also connected with the output end of the photovoltaic module theoretical maximum power obtaining unit；Described The output end of double division method device is connected with the input terminal of the real surplus capacity determining module.
Optionally, the real surplus capacity determining module includes: the second multiplier；
Output end, the electricity of the input terminal of second multiplier and the photovoltaic residue access capacity a reference value determining module The output end of the output end and photovoltaic power coefficient determination module of pressing correction factor determining module is respectively connected with.
Existing beneficial effect is the utility model embodiment compared with prior art: provided by the embodiment of the utility model Device is hardware device, has the advantages of succinct reliable, Maintenance free, and described device can first obtain the access of photovoltaic residue and hold Measure a reference value, voltage correction factor and photovoltaic power coefficient further according to acquisition to the photovoltaic residue access capacity a reference value into Row amendment, finally obtains the real surplus capacity of photovoltaic power generation, can according to the electrical appliance state parameter of access point in real time into The acquisition of row data and residual capacity calculate, and avoid relying in historical data, can provide for the calculating of remaining access photovoltaic capacity More intuitive opinion.
Detailed description of the invention
It, below will be to embodiment or the prior art in order to illustrate more clearly of the technical scheme in the embodiment of the utility model Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is only that this is practical new Some embodiments of type for those of ordinary skill in the art without any creative labor, can be with It obtains other drawings based on these drawings.
Fig. 1 is the structural block diagram of photovoltaic access capacity determining device provided by the embodiment of the utility model；
Fig. 2 is the structural block diagram of another photovoltaic access capacity determining device provided by the embodiment of the utility model.
Specific embodiment
In being described below, for illustration and not for limitation, the tool of such as particular system structure, technology etc is proposed Body details, to understand thoroughly the utility model embodiment.However, it will be clear to one skilled in the art that there is no these The utility model also may be implemented in the other embodiments of detail.In other situations, omit to well-known system, The detailed description of apparatus, circuit and method, in case unnecessary details interferes the description of the utility model.
In order to illustrate technical solution described in the utility model, the following is a description of specific embodiments.
Referring to Fig. 1, the structural block diagram of photovoltaic access capacity determining device provided by the embodiment of the utility model is shown, in detail It states as follows:
The photovoltaic access capacity determining device includes: that data acquisition module 10, photovoltaic residue access capacity a reference value are true Cover half block 20, voltage correction factor determining module 30, photovoltaic power coefficient determination module 40 and real surplus capacity determine mould Block 50.
The input terminal of the photovoltaic residue access capacity a reference value determining module 20 and the output end of data acquisition module 10 It is connected, the output end of the photovoltaic residue access capacity a reference value determining module 20 is defeated with real surplus capacity determining module 50 Enter end to be connected；The input terminal of the voltage correction factor determining module 30 is connected with the output end of data acquisition module 10, described The output end of voltage correction factor determining module 30 is connected with the input terminal of real surplus capacity determining module 50；The photovoltaic function The input terminal of rate coefficient determining module 40 is connected with the output end of data acquisition module 10, the photovoltaic power coefficient determination module 40 output end is connected with the input terminal of real surplus capacity determining module 50.
The data acquisition module 10 is for obtaining current maximum three-phase voltage virtual value and current three phase power virtual value； The photovoltaic residue access capacity a reference value determining module 20 is used to determine that photovoltaic residue connects according to current three phase power virtual value Enter capacity a reference value；The voltage correction factor determining module 30 is used to determine voltage according to current maximum three-phase voltage virtual value Correction factor；The photovoltaic power coefficient determination module 40 is used for real-time maximum power generation and photovoltaic group according to photovoltaic module The theoretical maximum generated output of part determines photovoltaic power coefficient；The real surplus capacity determining module 50 is used for surplus according to photovoltaic Remaining access capacity a reference value, voltage correction factor and photovoltaic power coefficient determine real surplus capacity.
It, can be according to data by photovoltaic residue access capacity a reference value determining module 20 in the utility model embodiment The a reference value that the current three phase power virtual value that module 10 obtains obtains a photovoltaic residue access capacity is obtained, however, the base Quasi- value is unable to the real surplus capacity that accurate representation photovoltaic accesses to load, because photovoltaic accesses to the real surplus capacity of load Also suffer from the influence of access point to the impedance magnitude of load and the practical maximum power of photovoltaic module.Therefore, practical at this Influence of the above-mentioned factor to real surplus capacity is considered in new embodiment, by the way that 30 He of voltage correction factor determining module is arranged Photovoltaic power coefficient determination module 40 obtains voltage correction factor and photovoltaic power coefficient respectively, and is corrected according to the voltage of acquisition Coefficient and photovoltaic power coefficient are modified photovoltaic access residual capacity a reference value, enable the real surplus capacity obtained Reasonably plan that user, the access capacity of access point provides a reference.
Device provided by the embodiment of the utility model is hardware device, has the advantages of succinct reliable, Maintenance free, institute Photovoltaic residue access capacity a reference value, voltage correction factor and photovoltaic power coefficient further according to acquisition can first be obtained by stating device The photovoltaic residue access capacity a reference value is modified, the real surplus capacity of photovoltaic power generation is finally obtained, it can It is calculated, is avoided relying in historical data, energy according to the acquisition of the electrical appliance state parameter real-time perfoming data of access point and residual capacity The enough calculating for remaining access photovoltaic capacity provides more intuitive opinion.
Referring to fig. 2, the structure of another photovoltaic access capacity determining device provided by the embodiment of the utility model is shown Block diagram, details are as follows:
In one embodiment, the data acquisition module 10 includes: electric energy computation chip 101, control unit 102 and deposits Reservoir 103；The input terminal of the electric energy computation chip 101 is connected with external voltage transformer and current transformer；The control The input terminal of unit 102 processed is connected with the output end of electric energy computation chip 101；The input terminal of the memory 103 and control are single The output end of member 102 is connected.
The input terminal phase of the output end of the memory 103 and the photovoltaic residue access capacity a reference value determining module 20 Even；The output end of the memory 103 is connected with the input terminal of the voltage correction factor determining module 30；The electrical energy measurement The output end of chip 101 is connected with the input terminal of the photovoltaic power coefficient determination module 40.
In the present embodiment, the electric energy computation chip 101 is used to complete the electrical energy measurement of route, specifically, the electricity The input terminal of energy metering chip 101 is connected with external voltage transformer and current transformer, the voltage transformer and electric current Mutual inductor is respectively used to the instantaneous voltage u of acquisition three-phase line access pointa、ub、ucWith transient current ia、ib、ic.Electrical energy measurement core Piece 101 can use ADE7758 chip, and the ADE7758 chip is a three-phase electrical energy computation chip with high accuracy, It realizes and instantaneous voltage and transient current is changed into three-phase voltage virtual value Ua、Ub、UcAnd three phase power virtual value Pa、Pb、 Pc。
The input terminal of described control unit 102 is connected with the output end of electric energy computation chip 101, according to electric energy computation chip The three-phase voltage virtual values of 101 outputs obtain current maximum three-phase voltage virtual values, and according to current three-phase voltage virtual value with The size relation of history three-phase voltage virtual value updates storage the maximum three-phase voltage virtual value of the storage of device 103.The memory 103 input terminal is connected with the output end of control unit 102, for the output signal of control unit 102 based on the received, to working as Three-phase voltage effective value and three phase power virtual value are stored, and the output end of the memory 103 and the photovoltaic are remaining The input terminal of access capacity a reference value determining module 20 is connected, the output end and the voltage correction factor of the memory 103 The input terminal of determining module 30 is connected, effective to provide three phase power for photovoltaic residue access capacity a reference value determining module 20 Value, and current maximum three-phase voltage virtual value is provided for voltage correction factor determining module 30.The electric energy computation chip 101 Output end be connected with the input terminal of the photovoltaic module theoretical maximum power obtaining unit 402, for be the photovoltaic module Theoretical maximum power obtaining unit 402 provides three phase power virtual value.
In one embodiment, control unit 102 includes: the first maximizing circuit 1021, comparator 1022 and switch Circuit 1023；The input terminal of the first maximizing circuit 1021 is connected with the output end of electric energy computation chip 101；The ratio It is connected compared with the input terminal of device 1022 with the output end of the first maximizing circuit 1021, the input terminal of the comparator 1022 Also it is connected with the output end of the memory 103；The output of the input terminal of the switching circuit 1023 and the comparator 1022 End is connected, the input terminal of the switching circuit 1023 also pass through the output end of data/address bus and the electric energy computation chip 101 with And the output end of the first maximizing circuit 1021 is connected；The output end and the memory of the switching circuit 1023 103 input terminal is connected.
After the electric energy computation chip 101 gets three-phase voltage virtual value and three phase power virtual value, first is asked most Big value circuit 1021 obtains three-phase voltage virtual value U from the electric energy computation chip 101a、Ub、Uc, and the three-phase electricity is pressed with Valid value Ua、Ub、UcIt is compared, obtains current maximum three-phase voltage virtual value, and be denoted as Umax1.Wherein, described first ask maximum Three input terminals of value circuit are connected with the output end of three voltage effective values of electric energy computation chip 101 respectively.First asks most The input terminal of the output termination comparator 1022 of big value circuit 1021, the input terminal of comparator 1022 are also connected with memory 103, For obtaining the history maximum three-phase voltage virtual value U stored in comparator 103max0, the comparator 1022 works as comparing Preceding maximum three-phase voltage virtual value Umax1With history maximum three-phase voltage virtual value Umax0Size, if Umax1Greater than Umax0When, than High level is exported compared with device 1022.The input terminal of the switching circuit 1023 is connected with the output end of comparator 1022, also passes through number It is connected according to bus with the first maximizing circuit 1021 and electric energy computation chip 101, when switching circuit 1023 compares receiving When the high level signal that device 1022 exports, the switching circuit 1023 is in closed state.The output of the switching circuit 1023 End be connected with the input terminal of the memory 103, the three phase power virtual value for exporting the electric energy computation chip 101 with The current maximum three-phase voltage virtual value of first maximizing circuit 1021 output is transmitted to memory 103.
In one embodiment, photovoltaic residue access capacity a reference value determining module 20 includes: that adder 201 and first subtract Musical instruments used in a Buddhist or Taoist mass 202；The input terminal of the adder 201 is connected with the output end of the data acquisition module 10；First subtracter 202 input terminal is connected with the output end of the adder 201；The output end of first subtracter 202 and the reality are surplus The input terminal of covolume amount determining module 50 is connected.
In the present embodiment, the photovoltaic residue access capacity a reference value determining module 20 includes adder 201 and first The input terminal of subtracter 202, the adder 201 is connect with the output end of data acquisition module 10, wherein is implemented as one Example, the adder 201 are connect with the memory 103 in data acquisition module 10, for obtaining the three-phase of the output of memory 103 Power virtual value.The three phase power virtual value P of 201 pairs of adder acquisitionsa、Pb、PcSummation operation is carried out, obtaining three phase power has The sum of valid value Pall, adder 201 can use 74LS283 chip herein.First subtracter 202 exports adder 201 The sum of three phase power virtual value PallSubtraction is carried out with the rated capacity of substation, the difference both obtained, and by the difference Value is used as photovoltaic residue access capacity a reference value, and the output end of first subtracter 202 and the real surplus capacity determine The input terminal of module 50 is connected, for the photovoltaic residue access capacity a reference value to be transmitted to real surplus capacity determining module 50.First subtracter 202 can realize that details are not described herein again based on adder 74LS283 chip.
In one embodiment, voltage correction factor determining module 30 includes: the second subtracter 301 and the first divider 302；The input terminal of second subtracter 301 is connected with the output end of the data acquisition module 10；First divider 302 input terminal is connected with the output end of second subtracter 301；The output end of first divider and the reality are surplus The input terminal of covolume amount determining module is connected.
In the present embodiment, the input terminal of the second subtracter 301 is connect with data acquisition module 10, wherein as one Embodiment, second subtracter 301 are connected with the output end of the memory 103 in data acquisition module 10, are used for from storage Current maximum voltage three-phase voltage virtual value U is obtained in device 103max1.Current maximum three-phase electricity is obtained by the second subtracter 301 It is pressed with valid value Umax1With the difference for allowing upper limit voltage value, the size for allowing upper limit voltage value is 242V, second subtraction Device 301 can also be realized based on adder 74LS283 chip.The input terminal of first divider 302 and the second subtracter 301 Output end be connected, for obtaining the current maximum three-phase voltage virtual value Umax1With the difference and volume for allowing upper limit voltage value The quotient of constant voltage, the voltage rating are 220V, and using acquired quotient as voltage correction factor.First divider 302 output end is connected with the input terminal of the real surplus capacity determining module 50, for being that the real surplus capacity is true Cover half block 50 provides voltage correction factor.The impedance as corresponding to diverse access point is different, and when impedance is excessive will cause and connect The voltage for entering circuit increases, by using the voltage value of the adjustable access circuit of voltage correction factor.
In one embodiment, the photovoltaic power coefficient determination module 40 includes: that the real-time maximum power of photovoltaic module obtains Take unit 401, photovoltaic module theoretical maximum power obtaining unit 402 and photovoltaic power factor determination unit 403；The photovoltaic group The input terminal of part theoretical maximum power obtaining unit 402 is connected with the output end of the data acquisition module 10；The photovoltaic function The input terminal of rate coefficient determination unit 403 is connected with the output end of the real-time maximum power acquiring unit 401 of the photovoltaic module, institute The input terminal for stating photovoltaic power factor determination unit 403 is also defeated with the photovoltaic module theoretical maximum power obtaining unit 402 Outlet is connected；The input terminal phase of the output end of the photovoltaic power factor determination unit and the real surplus capacity determining module Even.
In the present embodiment, by obtaining the theoretical maximum power of the real-time maximum power of photovoltaic module and photovoltaic module, And according to the ratio of real-time maximum power and theoretical maximum power as photovoltaic power coefficient, the real-time maximum power meeting of photovoltaic module Less than photovoltaic module theoretical maximum power, a reference value of the photovoltaic power coefficient to photovoltaic residue access capacity is modified, energy Enough obtain accurate real surplus capacity.
In one embodiment, the real-time maximum power acquiring unit 401 of the photovoltaic module include: photovoltaic module 4011, MPPT maximum power point tracking controller 4012, photovoltaic DC-to-AC converter 4013 and the first multiplier 4014；The MPPT maximum power point tracking control The input terminal of device 4012 processed is connected with the output end of the photovoltaic module 4011；The input terminal of the photovoltaic DC-to-AC converter 4013 and institute The output end for stating MPPT maximum power point tracking controller 4012 is connected；The input terminal and the photovoltaic of first multiplier 4014 are inverse The output end for becoming device 4013 is connected；The output end of first multiplier 4014 and the photovoltaic power factor determination unit 403 Input terminal be connected.
In the present embodiment, the real-time maximum power acquiring unit 401 of photovoltaic module needs to be arranged a photovoltaic module 4011, For received solar energy to be changed into electric energy.MPPT maximum power point tracking controller 4012 is a kind of solar energy tracking controller, The controller is capable of the generating voltage of real-time detection photovoltaic module, and tracks maximum voltage value and current value, by using Maximum power point to-controller 4012 enables to the real-time Maximum Power Output of photovoltaic module 4011.The photovoltaic DC-to-AC converter 4013 DC inverter when for by photovoltaic module 4011 by 4012 Maximum Power Output point of MPPT maximum power point tracking controller is Alternating current.The input terminal of first multiplier 4014 is connected with the output end of the photovoltaic DC-to-AC converter 4013, for acquisition Voltage and current do multiplication operation, obtain real-time maximum power.The output end and the photovoltaic of first multiplier 4014 The input terminal of power coefficient determination unit 403 is connected, for providing real-time maximum for the photovoltaic power factor determination unit 403 Power.
In one embodiment, the photovoltaic module theoretical maximum power obtaining unit 402 include: clock chip 4021, Second maximizing circuit 4022 and photovoltaic maximum output memory 4023；The input terminal of the second maximizing circuit 4022 It is connected with the output end of the data acquisition module 10；The input terminal and the clock of the photovoltaic maximum output memory 4023 The output end of chip 4021 is connected, and the input terminal of the photovoltaic maximum output memory 4023 is also electric with second maximizing The output end on road 4022 is connected；The output end of the photovoltaic maximum output memory and the photovoltaic power factor determination unit Input terminal is connected.
In the present embodiment, by the way that the second maximizing circuit 1021 is arranged, and it is connected with data acquisition module 10, Specifically, as one embodiment, the second maximizing circuit 1021 and the electrical energy measurement core in data acquisition module 10 The output end of piece 101 is connected, for obtaining the maximum power of the output of electric energy computation chip 101.Clock chip 4021 is used simultaneously Obtain solar day and when the sun, when the solar day that will acquire and the sun and maximum power is corresponded, and is stored to light Maximum output memory 4023 is lied prostrate, what the photovoltaic maximum output memory 4023 exported is photovoltaic module theoretical maximum function Rate.The input terminal phase of the output end and the photovoltaic power factor determination unit 403 of the photovoltaic maximum output memory 4023 Even, for providing photovoltaic module theoretical maximum power for the photovoltaic power factor determination unit 403.
In one embodiment, photovoltaic power factor determination unit 403 includes: the second divider 4031；Described second removes The input terminal of musical instruments used in a Buddhist or Taoist mass 4031 is connected with the output end of the real-time maximum power acquiring unit 401 of the photovoltaic module, and described second removes The input terminal of musical instruments used in a Buddhist or Taoist mass 4031 is also connected with the output end of the photovoltaic module theoretical maximum power obtaining unit 402；Described second The output end of divider 4031 is connected with the input terminal of the real surplus capacity determining module 50.
In the present embodiment, the photovoltaic power factor determination unit 403 is using the second divider 4031, and described The input data of double division method device 4031 is respectively the real-time maximum power of photovoltaic module and photovoltaic module theoretical maximum power.Pass through meter Calculate the practical maximum power of photovoltaic module and the quotient of theoretical maximum power, available photovoltaic power coefficient.Second division The output end of device 4031 is connected with the input terminal of the real surplus capacity determining module 50, for by the photovoltaic function of the acquisition Rate coefficient is sent to real surplus capacity determining module 50.
In one embodiment, real surplus capacity determining module 50 includes: the second multiplier 501；Second multiplication The input terminal of device 501 and the output end of the photovoltaic residue access capacity a reference value determining module 20, voltage correction factor determine The output end of module 30 and the output end of photovoltaic power coefficient determination module 40 are respectively connected with.
In the present embodiment, the real surplus capacity determining module 50 is realized using the second multiplier 501, described The input data of paired multiplier 501 is respectively photovoltaic residue access capacity a reference value, voltage correction factor and photovoltaic power system Number, second multiplier 501 do multiplying to the input data, pass through the voltage correction factor and photovoltaic power system It is several that the photovoltaic residue access capacity a reference value is modified, enable acquired real surplus capacity more accurate React the access capacity of access point.After obtaining the real surplus capacity, can by way of wirelessly or non-wirelessly transmitting incite somebody to action The real surplus capability value is transmitted to server, and the data of acquisition can be stored, convenient in the future analysis and system Meter.
Device provided by the embodiment of the utility model is hardware device, has the advantages of succinct reliable, Maintenance free, institute Photovoltaic residue access capacity a reference value, voltage correction factor and photovoltaic power coefficient further according to acquisition can first be obtained by stating device The photovoltaic residue access capacity a reference value is modified, the real surplus capacity of photovoltaic power generation is finally obtained, it can It is calculated, is avoided relying in historical data, energy according to the acquisition of the electrical appliance state parameter real-time perfoming data of access point and residual capacity Enough training and optimization process by traditional intelligent algorithm become the process of simple data statistics, can be remaining access photovoltaic The calculating of capacity provides more intuitive opinion.
It is apparent to those skilled in the art that for convenience of description and succinctly, only with above-mentioned each function Can unit, module division progress for example, in practical application, can according to need and by above-mentioned function distribution by different Functional unit, module are completed, i.e., the internal structure of described device is divided into different functional unit or module, more than completing The all or part of function of description.Each functional unit in embodiment, module can integrate in one processing unit, can also To be that each unit physically exists alone, can also be integrated in one unit with two or more units.In addition, each function Unit, module specific name be also only for convenience of distinguishing each other, the protection scope being not intended to limit this application.
Embodiment described above is only to illustrate the technical solution of the utility model, rather than its limitations；Although referring to before Embodiment is stated the utility model is described in detail, those skilled in the art should understand that: it still can be with It modifies the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；And These are modified or replaceed, the spirit for various embodiments of the utility model technical solution that it does not separate the essence of the corresponding technical solution And range, it should be included within the scope of protection of this utility model.

Claims (10)

1. a kind of photovoltaic access capacity determining device characterized by comprising data acquisition module, photovoltaic residue access capacity A reference value determining module, voltage correction factor determining module, photovoltaic power coefficient determination module and real surplus capacity determine Module；
The input terminal of the photovoltaic residue access capacity a reference value determining module is connected with the output end of data acquisition module, described The output end of photovoltaic residue access capacity a reference value determining module is connected with the input terminal of real surplus capacity determining module；It is described The input terminal of voltage correction factor determining module is connected with the output end of data acquisition module, and the voltage correction factor determines mould The output end of block is connected with the input terminal of real surplus capacity determining module；The input terminal of the photovoltaic power coefficient determination module It is connected with the output end of data acquisition module, the output end and real surplus capacity of the photovoltaic power coefficient determination module determine The input terminal of module is connected.
2. photovoltaic access capacity determining device as described in claim 1, which is characterized in that the data acquisition module includes: Electric energy computation chip, control unit and memory；
The input terminal of the electric energy computation chip is connected with external voltage transformer and current transformer；Described control unit Input terminal is connected with the output end of electric energy computation chip；The input terminal of the memory is connected with the output end of control unit；
The output end of the memory is connected with the input terminal of the photovoltaic residue access capacity a reference value determining module；It is described to deposit The output end of reservoir is connected with the input terminal of the voltage correction factor determining module；The output end of the electric energy computation chip with The input terminal of the photovoltaic power coefficient determination module is connected.
3. photovoltaic access capacity determining device as claimed in claim 2, which is characterized in that described control unit includes: first Maximizing circuit, comparator and switching circuit；
The input terminal of the first maximizing circuit is connected with the output end of electric energy computation chip；The input terminal of the comparator Be connected with the output end of the first maximizing circuit, the input terminal of the comparator also with the output end phase of the memory Even；The input terminal of the switching circuit is connected with the output end of the comparator, and the input terminal of the switching circuit also passes through number It is connected according to bus with the output end of the output end of the electric energy computation chip and the first maximizing circuit；The switch The output end of circuit is connected with the input terminal of the memory.
4. photovoltaic access capacity determining device as described in claim 1, which is characterized in that the photovoltaic residue access capacity base Quasi- value determining module includes: adder and the first subtracter；
The input terminal of the adder is connected with the output end of the data acquisition module；The input terminal of first subtracter with The output end of the adder is connected；The input of the output end of first subtracter and the real surplus capacity determining module End is connected.
5. photovoltaic access capacity determining device as described in claim 1, which is characterized in that the voltage correction factor determines mould Block includes: the second subtracter and the first divider；
The input terminal of second subtracter is connected with the output end of the data acquisition module；The input of first divider End is connected with the output end of second subtracter；The output end of first divider and the real surplus capacity determine mould The input terminal of block is connected.
6. photovoltaic access capacity determining device as described in claim 1, which is characterized in that the photovoltaic power coefficient determines mould Block includes: the real-time maximum power acquiring unit of photovoltaic module, photovoltaic module theoretical maximum power obtaining unit and photovoltaic power system Number determination unit；
The input terminal of the photovoltaic module theoretical maximum power obtaining unit is connected with the output end of the data acquisition module；Institute The input terminal for stating photovoltaic power factor determination unit is connected with the output end of the real-time maximum power acquiring unit of the photovoltaic module, Output end of the input terminal of the photovoltaic power factor determination unit also with the photovoltaic module theoretical maximum power obtaining unit It is connected；The output end of the photovoltaic power factor determination unit is connected with the input terminal of the real surplus capacity determining module.
7. photovoltaic access capacity determining device as claimed in claim 6, which is characterized in that the real-time maximum work of photovoltaic module Rate acquiring unit includes: photovoltaic module, MPPT maximum power point tracking controller, photovoltaic DC-to-AC converter and the first multiplier；
The input terminal of the MPPT maximum power point tracking controller is connected with the output end of the photovoltaic module；The photovoltaic DC-to-AC converter Input terminal be connected with the output end of the MPPT maximum power point tracking controller；The input terminal and the light of first multiplier The output end for lying prostrate inverter is connected；The input terminal of the output end of first multiplier and the photovoltaic power factor determination unit It is connected.
8. photovoltaic access capacity determining device as claimed in claim 6, which is characterized in that the photovoltaic module theoretical maximum function Rate acquiring unit includes: clock chip, the second maximizing circuit and photovoltaic maximum output memory；
The input terminal of the second maximizing circuit is connected with the output end of the data acquisition module；The photovoltaic maximum is defeated The input terminal of memory is connected with the output end of the clock chip out, the input terminal of the photovoltaic maximum output memory also with The output end of the second maximizing circuit is connected；The output end and the photovoltaic power of the photovoltaic maximum output memory The input terminal of factor determination unit is connected.
9. photovoltaic access capacity determining device as claimed in claim 6, which is characterized in that the photovoltaic power coefficient determines single Member includes: the second divider；
The input terminal of second divider is connected with the output end of the real-time maximum power acquiring unit of the photovoltaic module, described The input terminal of second divider is also connected with the output end of the photovoltaic module theoretical maximum power obtaining unit；Described second removes The output end of musical instruments used in a Buddhist or Taoist mass is connected with the input terminal of the real surplus capacity determining module.
10. such as the described in any item photovoltaic access capacity determining devices of claim 1-9, which is characterized in that the real surplus Capacity determining module includes: the second multiplier；
The input terminal of second multiplier and output end, the voltage of the photovoltaic residue access capacity a reference value determining module are repaired The output end of positive coefficient determining module and the output end of photovoltaic power coefficient determination module are respectively connected with.
CN201821387925.6U 2018-08-27 2018-08-27 Photovoltaic access capacity determining device Active CN208849469U (en)

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