CN203643885U - Photovoltaic array MPPT (maximum power point tracking) interface circuit with coupled inductor - Google Patents
Photovoltaic array MPPT (maximum power point tracking) interface circuit with coupled inductor Download PDFInfo
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Abstract
The utility model discloses a photovoltaic array MPPT (maximum power point tracking) interface circuit with a coupled inductor. The interface circuit comprises a main power loop and a multi-channel current controller 2 with an MPPT function, wherein the main power loop comprises n complete channel circuits; the multi-channel current controller matched with the main power loop is provided with a port vcj, a port vs, a port vgj, a port vsj, a port vgaj, a port viLj, a port vioj and a port vc. The interface circuit can be applied to a full-weather photovoltaic power generation system, is arranged behind a photovoltaic array and in front of a DC-DC (direct current-direct current) conversion device with controllable input current, can be used for accurately, stably and quickly acquiring a global maximum power point of the photovoltaic array in complex situations, has the capability of feeding internal excess energy back to the DC-DC conversion device with the controllable input current at the next stage, and also can be used for efficiently achieving the maximization of the utilization rate of the photovoltaic array.
Description
Technical field
The utility model relates to photovoltaic array MPPT(MPPT maximum power point tracking) interface circuit, can be applicable to round-the-clock photovoltaic generating system, especially a kind of photovoltaic array MPPT interface circuit containing coupling inductance.
Background technology
Photovoltaic generating system utilizes semi-conductive photovoltaic effect to change luminous energy into available electric energy.Photovoltaic array is the core in photovoltaic generating system.Conventionally, photovoltaic array is formed in parallel by multiple blocking diodes by the photovoltaic subarray (or photovoltaic module) of multiple identical or different specifications, then is connected with the remainder of photovoltaic generating system by the DC-DC converting means of high-gain.The factors such as the output power of photovoltaic array and array structure, load, solar irradiance, temperature, efficiency are closely related, and especially under round-the-clock complex situations, the characteristics of output power of (comprise that photovoltaic subarray specification difference or photovoltaic subarray specification are identical but locally shelter from heat or light, the situation such as short circuit, open circuit) photovoltaic array can present complicated multi-peak state.In the time that the characteristics of output power of photovoltaic array presents unimodal state of value, existing centralized maximal power tracing (MPPT) technology can both capture overall maximum power point accurately, steadily, rapidly.But in the time that the characteristics of output power of photovoltaic array presents multi-peak state, existing centralized MPPT technology is just merely able to ensure to capture accurately, steadily, rapidly local maximum power point.In the time that local maximum power point and overall maximum power point are not same point, the utilization factor of photovoltaic array will be had a greatly reduced quality.
Summary of the invention
For overcoming the deficiency of existing centralized MPPT technology in round-the-clock photovoltaic power generation applications, the utility model adopts distributed MPPT technology to propose a kind of photovoltaic array MPPT interface circuit containing coupling inductance, object is to help round-the-clock photovoltaic generating system to capture accurately, steadily, rapidly the global maximum power point of photovoltaic array, realizes the maximization of photovoltaic array utilization factor.
The utility model solves the technical scheme that its technical matters adopts: a kind of photovoltaic array MPPT interface circuit containing coupling inductance is made up of power major loop and multi channel currents controller 2 parts with MPPT function.
Described power major loop by the complete channel circuit of n (complete channels circuit 1 to complete channels circuit n) forms, and it is characterized in that: described complete channels circuit j(j=1 ..., n) by blocking diode Dij, input capacitance Cij, inductance L j, N-MOS is responsible for Mj, diode Dj, auxiliary capacitor Caj, N-MOS auxiliary tube Maj, coupling inductance Laj and Lbj, booster diode Daj, output capacitance Coj forms, and the positive output end of photovoltaic subarray j is connected with the anode of blocking diode Dij, the anode of the negative electrode of blocking diode Dij and input voltage Vij, one end of one end of input capacitance Cij and inductance L j is connected, the other end of inductance L j is connected with N-MOS supervisor's drain electrode of Mj and the anode of diode Dj, the negative electrode of diode Dj is connected with one end of auxiliary capacitor Caj and one end of coupling inductance Laj, the other end of coupling inductance Laj is connected with the drain electrode of N-MOS auxiliary tube Maj, the source electrode of N-MOS auxiliary tube Maj and one end of coupling inductance Lbj (with one end of described coupling inductance Laj be different name end relation), the source electrode of N-MOS supervisor Mj, the other end of auxiliary capacitor Caj, one end of output capacitance Coj, the positive input terminal of the controlled DC-DC converting means of the anode of output voltage V o and input current is connected, the other end (being different name end relation with the other end of described coupling inductance Laj) of coupling inductance Lbj is connected with the negative electrode of booster diode Daj, the output negative terminal of the anode of booster diode Daj and photovoltaic subarray j, the negative terminal of input voltage Vij, the other end of input capacitance Cij, the other end of output capacitance Coj, the negative input end of the controlled DC-DC converting means of the negative terminal of output voltage V o and input current is connected, and the contact of the contact of coupling inductance Lbj and booster diode Daj and coupling inductance Laj and diode Dj is Same Name of Ends relation,
Described complete channels circuit j(j=1, n) be also connected with the multi channel currents controller (being called for short: current controller) of the described MPPT of having function, described current controller has port vcj, port vs, port vgj, port vsj, port vgaj, port viLj, port vioj, port vc, it is characterized in that: the port vcj of described current controller is connected with the anode of described input voltage Vij, the port vs of described current controller is connected with the negative terminal of described input voltage Vij, the port vgj of described current controller is connected with the gate pole of described N-MOS supervisor Mj, the port vsj of described current controller is connected with described N-MOS supervisor's source electrode of Mj and the source electrode of described N-MOS auxiliary tube Maj, the port vgaj of described current controller is connected with the gate pole of described N-MOS auxiliary tube Maj, the port viLj of described current controller receives the detection signal of the current i Lj of inductance L j in described complete channels circuit j, the port vioj of described current controller receives the detection signal of the output current ioj of described complete channels circuit j, the port vc of described current controller sends the output total current information of described power major loop to the port vc of the controlled DC-DC converting means of described input current.
Further, the multi channel currents controller of the described MPPT of having function comprises accessory power supply unit, the communication unit that confluxes, MPPT control module and metal-oxide-semiconductor driver element, it is characterized in that: described accessory power supply unit can be described input voltage Vij(j=1, n) conflux described in converting to communication unit, described MPPT control module, the required supply voltage of described metal-oxide-semiconductor driver element work
The described communication unit that confluxes can be exported according to described complete channels circuit 1 the output total current information vc of described power major loop to the detection signal viol to vion of the output current io1 to ion of complete channels circuit n,
Described MPPT control module can be according to described complete channels circuit 1 to the inductance L j(j=1 in complete channels circuit n, n) the detection signal viLj of current i Lj and described input voltage Vij export the described N-MOS supervisor control signal vgpj of Mj and the control signal vapj of described N-MOS auxiliary tube Maj
Described metal-oxide-semiconductor driver element can be described N-MOS supervisor Mj(j=1,, the control signal vapj of control signal vgpj n) and described N-MOS auxiliary tube Maj converts the differential driving signal by port vgj, the port vsj of the multi channel currents controller of the described MPPT of having function and port vgaj output to.
Further, the MPPT control module of the described multi channel currents controller with MPPT function is by sampling holder 1j(j=1, n), sampling holder 2j, multiplier j, delay circuit j, amplifier 1j, amplifier 2j, reference voltage source 1j, reference voltage source 2j, subtracter 1j, subtracter 2j, triangular-wave generator 1j, triangular-wave generator 2j, comparer 1j, comparer 2j composition, it is characterized in that: the input end of described sampling holder 1j is connected with the port viLj of the multi channel currents controller of the described MPPT of having function, the output terminal of described sampling holder 1j is connected with an input end of described multiplier j and the input end of described amplifier 1j, the input end of described sampling holder 2j is connected with the port vcj of the multi channel currents controller of the described MPPT of having function, the output terminal of described sampling holder 2j is connected with another input end of described multiplier j, the output terminal of described multiplier j is connected with the positive input terminal of described subtracter 1j and the input end of described delay circuit j, the output terminal of described delay circuit j is connected with the negative input end of described subtracter 1j, the output terminal of described subtracter 1j is connected with the input end of described reference voltage source 1j, the output terminal of described reference voltage source 1j is connected with the negative input end of described subtracter 2j, the positive input terminal of described subtracter 2j is connected with the output terminal of described amplifier 1j, the output terminal of described subtracter 2j is connected with the input end of described amplifier 2j, the output terminal of described amplifier 2j is connected with the inverting input of described comparer 1j, the output terminal of described triangular-wave generator 1j is connected with the normal phase input end of described comparer 1j, described comparer 1j exports the control signal vgpj of described N-MOS supervisor Mj, the output terminal of described triangular-wave generator 2j is connected with the normal phase input end of described comparer 2j, the output terminal of described reference voltage source 2j is connected with the inverting input of described comparer 2j, described comparer 2j exports the control signal vapj of described N-MOS auxiliary tube Maj,
The communication unit that confluxes of the multi channel currents controller of the described MPPT of having function is made up of summing circuit, it is characterized in that: the input end vj(j=1 of described summing circuit, n) be connected with the port vioj of the multi channel currents controller of the described MPPT of having function, the output terminal of described summing circuit is connected with the port vc of the multi channel currents controller of the described MPPT of having function.
Technical conceive of the present utility model is: utilize distributed MPPT technology that the multi-peak of whole photovoltaic array output power under complex situations is got to global maximum problem reduction and become the unimodal value of each photovoltaic subarray output power to get max problem, propose to adopt the overall MPPT problem that solves photovoltaic array under round-the-clock complex situations containing the photovoltaic array MPPT interface circuit of coupling inductance, realize the maximization of photovoltaic array utilization factor.
The beneficial effects of the utility model are mainly manifested in: be applied to round-the-clock photovoltaic generating system, after being positioned at photovoltaic array containing the photovoltaic array MPPT interface circuit of coupling inductance, before the controlled DC-DC converting means of input current, it not only can be accurate, steadily, capture rapidly under complex situations and (to comprise identical but local the sheltering from heat or light of photovoltaic subarray specification difference or photovoltaic subarray specification, short circuit, the situations such as open circuit) global maximum power point of photovoltaic array, but also there is the ability that the excess energy in self circuit is fed back to the controlled DC-DC converting means of rear class input current, can realize expeditiously the maximization of photovoltaic array utilization factor.
Brief description of the drawings
Fig. 1 is the circuit diagram of the utility model embodiment.
Fig. 2 is the functional block diagram of the multi channel currents controller with MPPT function of the utility model embodiment.
Fig. 3 is the circuit diagram of the MPPT control module of the multi channel currents controller with MPPT function of the utility model embodiment.
Fig. 4 is the circuit diagram of the communication unit that confluxes of the multi channel currents controller with MPPT function of the utility model embodiment.
Fig. 5 is inductance L j(j=1 ..., n) and all exemplary operation oscillograms of the complete channels circuit j of the utility model embodiment in the situation in current continuity state of coupling inductance Laj and Lbj.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
Embodiment
With reference to figure 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, embodiment is made up of power major loop and multi channel currents controller 2 parts with MPPT function.
As shown in Figure 1, the power major loop of embodiment is made up of to complete channels circuit n complete channels circuit 1.The complete channels circuit j(j=1 of embodiment ..., n) by blocking diode Dij, input capacitance Cij, inductance L j, N-MOS is responsible for Mj, diode Dj, auxiliary capacitor Caj, N-MOS auxiliary tube Maj, coupling inductance Laj and Lbj, booster diode Daj, output capacitance Coj forms, and the positive output end of photovoltaic subarray j is connected with the anode of blocking diode Dij, the anode of the negative electrode of blocking diode Dij and input voltage Vij, one end of one end of input capacitance Cij and inductance L j is connected, the other end of inductance L j is connected with N-MOS supervisor's drain electrode of Mj and the anode of diode Dj, the negative electrode of diode Dj is connected with one end of auxiliary capacitor Caj and one end of coupling inductance Laj, the other end of coupling inductance Laj is connected with the drain electrode of N-MOS auxiliary tube Maj, the source electrode of N-MOS auxiliary tube Maj and one end of coupling inductance Lbj (with one end of described coupling inductance Laj be different name end relation), the source electrode of N-MOS supervisor Mj, the other end of auxiliary capacitor Caj, one end of output capacitance Coj, the positive input terminal of the controlled DC-DC converting means of the anode of output voltage V o and input current is connected, the other end (being different name end relation with the other end of described coupling inductance Laj) of coupling inductance Lbj is connected with the negative electrode of booster diode Daj, the output negative terminal of the anode of booster diode Daj and photovoltaic subarray j, the negative terminal of input voltage Vij, the other end of input capacitance Cij, the other end of output capacitance Coj, the negative input end of the controlled DC-DC converting means of the negative terminal of output voltage V o and input current is connected, and the contact of the contact of coupling inductance Lbj and booster diode Daj and coupling inductance Laj and diode Dj is Same Name of Ends relation.
As shown in Figure 1, the complete channels circuit j(j=1 of embodiment, n) be also connected with the multi channel currents controller with MPPT function (being called for short: current controller) of embodiment, the current controller of embodiment has port vcj, port vs, port vgj, port vsj, port vgaj, port viLj, port vioj, port vc, the port vcj of the current controller of embodiment is connected with the anode of described input voltage Vij, the port vs of the current controller of embodiment is connected with the negative terminal of described input voltage Vij, the port vgj of the current controller of embodiment is connected with the gate pole of N-MOS supervisor Mj, the port vsj of the current controller of embodiment is connected with N-MOS supervisor's source electrode of Mj and the source electrode of N-MOS auxiliary tube Maj, the port vgaj of the current controller of embodiment is connected with the gate pole of N-MOS auxiliary tube Maj, the detection signal of the current i Lj of the port viLj receiving inductance Lj of the current controller of embodiment, the port vioj of the current controller of embodiment receives the detection signal of the output current ioj of complete channel circuit j, the port vc of the current controller of embodiment sends the output total current information of described power major loop to the port vc of the controlled DC-DC converting means of described input current.
As shown in Figure 2, the multi channel currents controller with MPPT function of embodiment comprise accessory power supply unit, the communication unit that confluxes, MPPT control module and metal-oxide-semiconductor driver element.The accessory power supply unit of embodiment can be input voltage Vij(j=1 ..., n) convert the communication unit that confluxes, MPPT control module and the required supply voltage of metal-oxide-semiconductor driver element work to.The communication unit that confluxes of embodiment can be exported according to the complete channels circuit 1 of embodiment the output total current information vc of the power major loop of embodiment to the detection signal viol to vion of the output current io1 to ion of complete channels circuit n.The MPPT control module of embodiment can be according to the complete channels circuit 1 of embodiment to the inductance L j(j=1 in complete channels circuit n,, the detection signal viLj of current i Lj n) and the input voltage Vij output N-MOS supervisor control signal vgpj of Mj and the control signal vapj of N-MOS auxiliary tube Maj.The metal-oxide-semiconductor driver element of embodiment receives the N-MOS supervisor control signal vgpj of Mj and the control signal vapj of N-MOS auxiliary tube Maj and converts port vgj, the port vsj of the multi channel currents controller with MPPT function and the differential driving signal of port vgaj output by embodiment to.
As shown in Figure 3, the MPPT control module of the multi channel currents controller with MPPT function of embodiment is by sampling holder 1j(j=1,, n), sampling holder 2j, multiplier j, delay circuit j, amplifier 1j, amplifier 2j, reference voltage source 1j, reference voltage source 2j, subtracter 1j, subtracter 2j, triangular-wave generator 1j, triangular-wave generator 2j, comparer 1j, comparer 2j composition.The input end of the sampling holder 1j of embodiment is connected with the port viLj of the multi channel currents controller with MPPT function of embodiment, input end of the output terminal of sampling holder 1j and multiplier j and the input end of amplifier 1j are connected, the input end of sampling holder 2j is connected with the port vcj of the multi channel currents controller with MPPT function of embodiment, the output terminal of sampling holder 2j is connected with another input end of multiplier j, the output terminal of multiplier j is connected with the positive input terminal of subtracter 1j and the input end of delay circuit j, the output terminal of delay circuit j is connected with the negative input end of subtracter 1j, the output terminal of subtracter 1j is connected with the input end of reference voltage source 1j, the output terminal of reference voltage source 1j is connected with the negative input end of subtracter 2j, the positive input terminal of subtracter 2j is connected with the output terminal of amplifier 1j, the output terminal of subtracter 2j is connected with the input end of amplifier 2j, the output terminal of amplifier 2j is connected with the inverting input of comparer 1j, the output terminal of triangular-wave generator 1j is connected with the normal phase input end of comparer 1j, the control signal vgpj of the N-MOS supervisor Mj of comparer 1j output embodiment, the output terminal of triangular-wave generator 2j is connected with the normal phase input end of comparer 2j, the output terminal of reference voltage source 2j is connected with the inverting input of comparer 2j, the control signal vapj of the N-MOS auxiliary tube Maj of comparer 2j output embodiment.
As shown in Figure 4, the communication unit that confluxes of the multi channel currents controller with MPPT function of embodiment is made up of summing circuit.The input end vj(j=1 of the summing circuit of embodiment, n) be connected with the port vioj of the multi channel currents controller with MPPT function of embodiment, the input end of the summing circuit of embodiment is connected with the port vc of the multi channel currents controller with MPPT function of embodiment.
Fig. 5 is inductance L j(j=1 ..., n) and all exemplary operation oscillograms of the complete channels circuit j of embodiment in the situation in current continuity state of coupling inductance Laj and Lbj.At inductance L j(j=1 ..., n) and all complete channels circuit j(j=1 of embodiment in the situation in current continuity state of coupling inductance Laj and Lbj ..., steady operation process n) comprises following 4 stages.
Stage 1:N-MOS is responsible for Mj(j=1 ..., n) conducting, N-MOS auxiliary tube Maj conducting.Photovoltaic subarray j, blocking diode Dij, input capacitance Cij, inductance L j, N-MOS supervisor Mj, output capacitance Coj and the controlled DC-DC converting means of input current form a loop.Now, the voltage vLj=Vij-Vo>0 at inductance L j two ends, inductance L j charging, current i Lj and current i Mj all increase.Diode Dj cut-off, current i Dj=0.Auxiliary capacitor Caj, coupling inductance Laj, N-MOS auxiliary tube Maj form another loop.Now, auxiliary capacitor Caj electric discharge, coupling inductance Laj charging, current i Laj increases, and is magnetic energy preservation by electric energy conversion unnecessary in circuit.Booster diode Daj cut-off, the current i Lbj=0 of coupling inductance Lbj.
Stage 2:N-MOS is responsible for Mj(j=1 ..., n) turn-off (current i Mj=0), N-MOS auxiliary tube Maj conducting.Diode Dj conducting, the controlled DC-DC converting means of photovoltaic subarray j, blocking diode Dij, input capacitance Cij, inductance L j, diode Dj, auxiliary capacitor Caj, output capacitance Coj and input current forms a loop.Now, the voltage vLj=Vij – vCaj – Vo<0 at inductance L j two ends, inductance L j electric discharge, current i Lj and current i Dj all reduce.Photovoltaic subarray j, blocking diode Dij, input capacitance Cij, inductance L j, diode Dj, coupling inductance Laj, N-MOS auxiliary tube Maj, output capacitance Coj and the controlled DC-DC converting means of input current form another loop.Now, coupling inductance Laj charging, current i Laj increases, and is magnetic energy preservation by electric energy conversion unnecessary in circuit.Booster diode Daj cut-off, the current i Lbj=0 of coupling inductance Lbj.
Stage 3:N-MOS is responsible for Mj(j=1 ..., n) turn-offing (current i Mj=0), N-MOS auxiliary tube Maj turn-offs (the current i Laj=0 of coupling inductance Laj).Diode Dj conducting, the controlled DC-DC converting means of photovoltaic subarray j, blocking diode Dij, input capacitance Cij, inductance L j, diode Dj, auxiliary capacitor Caj, output capacitance Coj and input current forms a loop.Now, the voltage vLj=Vij – vCaj – Vo<0 at inductance L j two ends, inductance L j electric discharge, current i Lj and current i Dj all reduce, and auxiliary capacitor Caj charging, preserves unnecessary electric energy in circuit.Booster diode Daj conducting, the controlled DC-DC converting means of booster diode Daj, coupling inductance Lbj, capacitor C oj and input current forms another loop.Now, coupling inductance Lbj electric discharge, current i Lbj reduces, and the magnetic energy of preservation is fed back to the controlled DC-DC converting means of input current.
Stage 4:N-MOS is responsible for Mj(j=1 ..., n) conducting, N-MOS auxiliary tube Maj turn-offs (the current i Laj=0 of coupling inductance Laj).Photovoltaic subarray j, blocking diode Dij, input capacitance Cij, inductance L j, N-MOS supervisor Mj, output capacitance Coj and the controlled DC-DC converting means of input current form a loop.Now, the voltage vLj=Vij-Vo>0 at inductance L j two ends, inductance L j charging, current i Lj and current i Mj all increase.Diode Dj cut-off, current i Dj=0.Booster diode Daj conducting, the controlled DC-DC converting means of booster diode Daj, coupling inductance Lbj, output capacitance Coj and input current forms another loop.Now, coupling inductance Lbj electric discharge, current i Lbj reduces, and the magnetic energy of preservation is fed back to the controlled DC-DC converting means of input current.
Under the control of multi channel currents controller with MPPT function, the complete channels circuit j(j=1 of embodiment ..., n) always work near the maximum power point of photovoltaic subarray j.The characteristics of output power that is different from whole photovoltaic array under complex situations can present multi-peak state, and the characteristics of output power of photovoltaic subarray keeps unimodal state of value conventionally.Therefore,, as long as capture respectively the maximum power point of photovoltaic subarray 1 to photovoltaic subarray n, can obtain the global maximum power point of whole photovoltaic array.The strategy of the maximum power point of capture photovoltaic subarray j is as follows: in the time the current output power of photovoltaic subarray j being detected than the output power of previous moment little (being vpij (n) <vpij (n-1)), by increasing the output valve Vref1j (n) of reference voltage source 1j, make the dutycycle of the control signal vgpj of N-MOS supervisor Mj increase, make the output current of photovoltaic subarray j become large, thus the output power in a moment after change photovoltaic subarray j.In the time the current output power of photovoltaic subarray j being detected than the output power of previous moment large (being vpij (n) >vpij (n-1)), by reducing the output valve Vref1j (n) of reference voltage source 1j, make the dutycycle of the control signal vgpj of N-MOS supervisor Mj reduce, the output current of photovoltaic subarray j is diminished, thus the output power in a moment after change photovoltaic subarray j.By regulating, finally realize the output power (being vpij (n) ≈ vpij (n-1)) that the current output power of photovoltaic subarray j approximates previous moment, reach the maximum power point of photovoltaic subarray j.
Content described in this instructions embodiment is only enumerating of way of realization to utility model design; protection domain of the present utility model should not be regarded as only limiting to the concrete form that embodiment states, protection domain of the present utility model is also and conceive the equivalent technologies means that can expect according to the utility model in those skilled in the art.
Claims (4)
1. containing a photovoltaic array MPPT interface circuit for coupling inductance, it is characterized in that: the described photovoltaic array MPPT interface circuit containing coupling inductance is made up of power major loop and multi channel currents controller 2 parts with MPPT function,
Described power major loop is made up of to complete channels circuit n complete channels circuit 1, described complete channels circuit j, and j=1 ..., n, by blocking diode Dij, input capacitance Cij, inductance L j, N-MOS is responsible for Mj, diode Dj, auxiliary capacitor Caj, N-MOS auxiliary tube Maj, coupling inductance Laj and Lbj, booster diode Daj, output capacitance Coj forms, and the positive output end of photovoltaic subarray PVj is connected with the anode of blocking diode Dij, the anode of the negative electrode of blocking diode Dij and input voltage Vij, one end of one end of input capacitance Cij and inductance L j is connected, the other end of inductance L j is connected with N-MOS supervisor's drain electrode of Mj and the anode of diode Dj, the negative electrode of diode Dj is connected with one end of auxiliary capacitor Caj and one end of coupling inductance Laj, the other end of coupling inductance Laj is connected with the drain electrode of N-MOS auxiliary tube Maj, the source electrode of N-MOS auxiliary tube Maj and one end of coupling inductance Lbj, the source electrode of N-MOS supervisor Mj, the other end of auxiliary capacitor Caj, one end of output capacitance Coj, the positive input terminal of the controlled DC-DC converting means of the anode of output voltage V o and input current is connected, one end of described coupling inductance Lbj and one end of described coupling inductance Laj are different name end relations, the other end of coupling inductance Lbj is connected with the negative electrode of booster diode Daj, the other end of described coupling inductance Lbj and the other end of described coupling inductance Laj are different name end relations, the output negative terminal of the anode of booster diode Daj and photovoltaic subarray PVj, the negative terminal of input voltage Vij, the other end of input capacitance Cij, the other end of output capacitance Coj, the negative input end of the controlled DC-DC converting means of the negative terminal of output voltage V o and input current is connected, and the contact of the contact of coupling inductance Lbj and booster diode Daj and coupling inductance Laj and diode Dj is Same Name of Ends relation,
The multi channel currents controller of the described MPPT of having function has port vcj, j=1, n, port vs, port vgj, port vsj, port vgaj, port viLj, port vioj, port vc, the port vcj of the multi channel currents controller of the described MPPT of having function is connected with the anode of described input voltage Vij, the port vs of the multi channel currents controller of the described MPPT of having function is connected with the negative terminal of described input voltage Vij, the port vgj of the multi channel currents controller of the described MPPT of having function is connected with the gate pole of described N-MOS supervisor Mj, the port vsj of the multi channel currents controller of the described MPPT of having function is connected with described N-MOS supervisor's source electrode of Mj and the source electrode of described N-MOS auxiliary tube Maj, the port vgaj of the multi channel currents controller of the described MPPT of having function is connected with the gate pole of described N-MOS auxiliary tube Maj, the port viLj of the multi channel currents controller of the described MPPT of having function receives the detection signal of the current i Lj of described inductance L j, the port vioj of the multi channel currents controller of the described MPPT of having function receives the detection signal of the output current ioj of described complete channels circuit j, the port vc of the multi channel currents controller of the described MPPT of having function sends the output total current information of described power major loop to the port vc of the controlled DC-DC converting means of described input current.
2. the photovoltaic array MPPT interface circuit containing coupling inductance as claimed in claim 1, is characterized in that: described in there is MPPT function multi channel currents controller comprise accessory power supply unit, the communication unit that confluxes, MPPT control module and metal-oxide-semiconductor driver element,
Described accessory power supply unit can be described input voltage Vij, j=1 ..., n, the communication unit that confluxes described in converting to, described MPPT control module, the required supply voltage of described metal-oxide-semiconductor driver element work,
The described communication unit that confluxes can be exported according to described complete channels circuit 1 to the detection signal of the output current io1 to ion of complete channels circuit n the output total current information vc of described power major loop,
Described MPPT control module can be according to described complete channels circuit 1 to the inductance L j in complete channels circuit n, j=1 ..., n, the detection signal of current i Lj and described input voltage Vij export the described N-MOS supervisor control signal vgpj of Mj and the control signal vapj of described N-MOS auxiliary tube Maj
Described metal-oxide-semiconductor driver element can be described N-MOS supervisor Mj, j=1, n, control signal vgpj and the control signal vapj of described N-MOS auxiliary tube Maj convert to by port vgj, the port vsj of the multi channel currents controller of the described MPPT of having function and the differential driving signal of port vgaj output.
3. the photovoltaic array MPPT interface circuit containing coupling inductance as claimed in claim 2, it is characterized in that: described in there is MPPT function the MPPT control module of multi channel currents controller by sampling holder 1j, j=1, n, sampling holder 2j, multiplier j, delay circuit j, amplifier 1j, amplifier 2j, reference voltage source 1j, reference voltage source 2j, subtracter 1j, subtracter 2j, triangular-wave generator 1j, triangular-wave generator 2j, comparer 1j, comparer 2j composition, the input end of described sampling holder 1j is connected with the port viLj of the multi channel currents controller of the described MPPT of having function, the output terminal of described sampling holder 1j is connected with an input end of described multiplier j and the input end of described amplifier 1j, the input end of described sampling holder 2j is connected with the port vcj of the multi channel currents controller of the described MPPT of having function, the output terminal of described sampling holder 2j is connected with another input end of described multiplier j, the output terminal of described multiplier j is connected with the positive input terminal of described subtracter 1j and the input end of described delay circuit j, the output terminal of described delay circuit j is connected with the negative input end of described subtracter 1j, the output terminal of described subtracter 1j is connected with the input end of described reference voltage source 1j, the output terminal of described reference voltage source 1j is connected with the negative input end of described subtracter 2j, the positive input terminal of described subtracter 2j is connected with the output terminal of described amplifier 1j, the output terminal of described subtracter 2j is connected with the input end of described amplifier 2j, the output terminal of described amplifier 2j is connected with the inverting input of described comparer 1j, the output terminal of described triangular-wave generator 1j is connected with the normal phase input end of described comparer 1j, described comparer 1j exports the control signal vgpj of described N-MOS supervisor Mj, the output terminal of described triangular-wave generator 2j is connected with the normal phase input end of described comparer 2j, the output terminal of described reference voltage source 2j is connected with the inverting input of described comparer 2j, described comparer 2j exports the control signal vapj of described N-MOS auxiliary tube Maj.
4. the photovoltaic array MPPT interface circuit containing coupling inductance as described in one of claim 2 and 3, it is characterized in that: described in there is the multi channel currents controller of MPPT function the communication unit that confluxes formed by summing circuit, the input end vj of described summing circuit, j=1, n, is connected with the port vioj of the multi channel currents controller of the described MPPT of having function, and the output terminal of described summing circuit is connected with the port vc of the multi channel currents controller of the described MPPT of having function.
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| CN201320529266.6U CN203643885U (en) | 2013-08-28 | 2013-08-28 | Photovoltaic array MPPT (maximum power point tracking) interface circuit with coupled inductor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499992A (en) * | 2013-08-28 | 2014-01-08 | 浙江工业大学 | Photovoltaic array MPPT interface circuit with coupling inductor |
| CN106371495A (en) * | 2016-10-14 | 2017-02-01 | 西安电子科技大学 | Micro energy capture MPPT control circuit and energy capture circuit |
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2013
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499992A (en) * | 2013-08-28 | 2014-01-08 | 浙江工业大学 | Photovoltaic array MPPT interface circuit with coupling inductor |
| CN103499992B (en) * | 2013-08-28 | 2015-03-04 | 浙江工业大学 | Photovoltaic array MPPT interface circuit with coupling inductor |
| CN106371495A (en) * | 2016-10-14 | 2017-02-01 | 西安电子科技大学 | Micro energy capture MPPT control circuit and energy capture circuit |
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