CN103499993A - Photovoltaic array MPPT interface circuit containing coupling inductor - Google Patents
Photovoltaic array MPPT interface circuit containing coupling inductor Download PDFInfo
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- CN103499993A CN103499993A CN201310383091.7A CN201310383091A CN103499993A CN 103499993 A CN103499993 A CN 103499993A CN 201310383091 A CN201310383091 A CN 201310383091A CN 103499993 A CN103499993 A CN 103499993A
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Abstract
A photovoltaic array MPPT interface circuit containing a coupling inductor is composed of a power major loop and a multi-channel current controller with an MPPT function. The power major loop is composed of one complete channel circuit and n-1 simplified channel circuits. The multi-channel current controller with the MPPT function 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 to be matched with the power major loop. The photovoltaic array MPPT interface circuit containing the coupling inductor can be applied to an all-weather photovoltaic power generation system and is arranged behind a photovoltaic array and in front of a DC-DC conversion device with controllable input currents, and the global maximal power point of the photovoltaic array in complex conditions can be captured accurately, stably and quickly. Further, the photovoltaic array MPPT interface circuit containing the coupling inductor has the ability to feed the excess energy in an own circuit to the backward stage DC-DC conversion device with the adjustable input currents, and the maximization of the utilization rate of the photovoltaic array can be achieved efficiently.
Description
Technical field
The present invention 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.Usually, photovoltaic array is formed in parallel by a plurality of blocking diodes by the photovoltaic subarray (or photovoltaic module) of a plurality of 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.When 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, when the characteristics of output power of photovoltaic array presents the multi-peak state, existing centralized MPPT technology just is merely able to guarantee to capture accurately, steadily, rapidly local maximum power point.When 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 existing centralized deficiency of MPPT technology in round-the-clock photovoltaic power generation applications, the present invention adopts distributed MPPT technology to propose a kind of photovoltaic array MPPT interface circuit containing coupling inductance, purpose 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 technical solution adopted for the present invention to solve the technical problems is: a kind of photovoltaic array MPPT interface circuit containing coupling inductance is comprised of power major loop and multi channel currents controller 2 parts with MPPT function.
Described power major loop is comprised of 1 complete channel circuit (complete channels circuit 1) and n-1 the channel circuit of simplifying (simplifying channel circuit 2 to complete channels circuit n), it is characterized in that: described complete channels circuit 1 is by blocking diode Di1, input capacitance Ci1, inductance L 1, N-MOS is responsible for M1, diode D1, auxiliary capacitor Ca1, N-MOS auxiliary tube Ma1, coupling inductance La1 and Lb1, booster diode Da1, output capacitance Co1 forms, the positive output end of photovoltaic subarray 1 is connected with the anode of blocking diode Di1, the anode of the negative electrode of blocking diode Di1 and input voltage Vi1, the end of input capacitance Ci1 and an end of inductance L 1 are connected, the other end of inductance L 1 is connected with the drain electrode of N-MOS supervisor M1 and the anode of diode D1, the negative electrode of diode D1 is connected with the end of auxiliary capacitor Ca1 and the end of coupling inductance La1, the other end of coupling inductance La1 is connected with the drain electrode of N-MOS auxiliary tube Ma1, the source electrode of N-MOS auxiliary tube Ma1 and the end of coupling inductance Lb1 (with the end of described coupling inductance La1 be different name end relation), the source electrode of N-MOS supervisor M1, the other end of auxiliary capacitor Ca1, the end of output capacitance Co1, the positive input terminal of the DC-DC converting means that the anode of output voltage V o and input current are controlled is connected, the other end of coupling inductance Lb1 (being different name end relation with the other end of described coupling inductance La1) is connected with the negative electrode of booster diode Da1, the negative output terminal of the anode of booster diode Da1 and photovoltaic subarray 1, the negative terminal of input voltage Vi1, the other end of input capacitance Ci1, the other end of output capacitance Co1, the negative input end of the DC-DC converting means that the negative terminal of output voltage V o and input current are controlled is connected, the contact of the contact of coupling inductance Lb1 and booster diode Da1 and coupling inductance Laj and diode Dj is the Same Name of Ends relation,
Described simplification channel circuit k(k=2, ..., n) by blocking diode Dik, input capacitance Cik, inductance L k, N-MOS is responsible for Mk, diode Dk, output capacitance Cok forms, the positive output end of photovoltaic subarray k is connected with the anode of blocking diode Dik, the anode of the negative electrode of blocking diode Dik and input voltage Vik, the end of input capacitance Cik and the end of inductance L k are connected, the other end of inductance L k is connected with the drain electrode of N-MOS supervisor Mk and the anode of diode Dk, the negative electrode of diode Dk is connected with the negative electrode of diode D1 in described complete channels circuit 1, the source electrode of N-MOS supervisor Mk and the end of output capacitance Cok, the positive input terminal of the DC-DC converting means that the anode of output voltage V o and input current are controlled is connected, the negative output terminal of photovoltaic subarray k and the negative terminal of input voltage Vik, the other end of input capacitance Cik, the other end of output capacitance Cok, the negative input end of the DC-DC converting means that the negative terminal of output voltage V o and input current are controlled is connected,
Described complete channels circuit 1 and simplification channel circuit k(k=2, ..., n) also with the multi channel currents controller of the described MPPT of having function, (be called for short: current controller) be connected, described current controller has port vcj(j=1, ..., n), port vs, port vgj, port vsj, port vgaj, port viLj, port vioj, port vc, it is characterized in that: the port vc1 of described current controller is connected with the anode of described input voltage Vi1, the port vs of described current controller is connected with the negative terminal of described input voltage Vi1, the port vg1 of described current controller is connected with the gate pole of described N-MOS supervisor M1, the port vs1 of described current controller is connected with the source electrode of described N-MOS supervisor M1 and the source electrode of described N-MOS auxiliary tube Ma1, the port vga1 of described current controller is connected with the gate pole of described N-MOS auxiliary tube Ma1, the port viL1 of described current controller receives the detection signal of the current i L1 of described inductance L 1, the port vio1 of described current controller receives the detection signal of the output current io1 of described complete channels circuit 1, the port vck(k=2 of described current controller, ..., n) with the anode of described input voltage Vik, be connected, the port vs of described current controller is connected with the negative terminal of described input voltage Vik, the port vgk of described current controller is connected with the gate pole of described N-MOS supervisor Mk, the port vsk of described current controller is connected with the source electrode of described N-MOS supervisor Mk, the port vgak of described current controller is unsettled, the port viLk of described current controller receives the detection signal of the current i Lk of described inductance L k, the port viok of described current controller receives the detection signal of the output current iok of described simplification channel circuit k, the port vc of the DC-DC converting means that the port vc of described current controller is controlled to described input current sends the output total current information of described power major loop.
Further, the multi channel currents controller of the described MPPT of having function comprises the 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) convert the described communication unit that confluxes, described MPPT control module, the required supply voltage of described metal-oxide-semiconductor driver element work to
The described communication unit that confluxes can be exported the output total current information vc of described power major loop according to described complete channels circuit 1 and described simplification channel circuit 2 to the detection signal viol to vion of the output current io1 to ion that simplifies channel circuit n,
Described MPPT control module can be according to described complete channels circuit 1 and described simplification channel circuit 2 to the inductance L j(j=1 simplified in channel circuit n, n) the detection signal viLj of current i Lj and described input voltage Vij export the control signal vgpj of described N-MOS supervisor 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 forms, 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 the 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 comprised of summing circuit, it is characterized in that: the input end vj(j=1 of described summing circuit, n) with the port vioj of the multi channel currents controller of the described MPPT of having function, be connected, 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 invention is: utilize distributed MPPT technology that the multi-peak of whole photovoltaic array output power under complex situations is got to the 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.
Beneficial effect of the present invention is 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.
The accompanying drawing explanation
Fig. 1 is the circuit diagram of the embodiment of the present invention.
Fig. 2 is the functional block diagram of the multi channel currents controller with MPPT function of the embodiment of the present invention.
Fig. 3 is the circuit diagram of MPPT control module of the multi channel currents controller with MPPT function of the embodiment of the present invention.
Fig. 4 is the circuit diagram of the communication unit that confluxes of the multi channel currents controller with MPPT function of the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Embodiment
With reference to figure 1, Fig. 2, Fig. 3 and Fig. 4, embodiment is comprised 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 by complete channels circuit 1 with simplify channel circuit 2 and form to complete channels circuit n.The complete channels circuit 1 of embodiment is by blocking diode Di1, input capacitance Ci1, inductance L 1, N-MOS is responsible for M1, diode D1, auxiliary capacitor Ca1, N-MOS auxiliary tube Ma1, coupling inductance La1 and Lb1, booster diode Da1, output capacitance Co1 forms, and the positive output end of photovoltaic subarray 1 is connected with the anode of blocking diode Di1, the anode of the negative electrode of blocking diode Di1 and input voltage Vi1, the end of input capacitance Ci1 and an end of inductance L 1 are connected, the other end of inductance L 1 is connected with the drain electrode of N-MOS supervisor M1 and the anode of diode D1, the negative electrode of diode D1 is connected with the end of auxiliary capacitor Ca1 and the end of coupling inductance La1, the other end of coupling inductance La1 is connected with the drain electrode of N-MOS auxiliary tube Ma1, the source electrode of N-MOS auxiliary tube Ma1 and the end of coupling inductance Lb1 (with the end of described coupling inductance La1 be different name end relation), the source electrode of N-MOS supervisor M1, the other end of auxiliary capacitor Ca1, the end of output capacitance Co1, the positive input terminal of the DC-DC converting means that the anode of output voltage V o and input current are controlled is connected, the other end of coupling inductance Lb1 (being different name end relation with the other end of described coupling inductance La1) is connected with the negative electrode of booster diode Da1, the negative output terminal of the anode of booster diode Da1 and photovoltaic subarray 1, the negative terminal of input voltage Vi1, the other end of input capacitance Ci1, the other end of output capacitance Co1, the negative input end of the DC-DC converting means that the negative terminal of output voltage V o and input current are controlled is connected.The simplification channel circuit k(k=2 of embodiment ..., n) by blocking diode Dik, input capacitance Cik, inductance L k, N-MOS is responsible for Mk, diode Dk, output capacitance Cok forms, and the positive output end of photovoltaic subarray k is connected with the anode of blocking diode Dik, the anode of the negative electrode of blocking diode Dik and input voltage Vik, the end of input capacitance Cik and the end of inductance L k are connected, the other end of inductance L k is connected with the drain electrode of N-MOS supervisor Mk and the anode of diode Dk, the negative electrode of diode D1 in the complete channels circuit 1 of the negative electrode of diode Dk and embodiment is connected, the source electrode of N-MOS supervisor Mk and the end of output capacitance Cok, the positive input terminal of the DC-DC converting means that the anode of output voltage V o and input current are controlled is connected, the negative output terminal of photovoltaic subarray k and the negative terminal of input voltage Vik, the other end of input capacitance Cik, the other end of output capacitance Cok, the negative input end of the DC-DC converting means that the negative terminal of output voltage V o and input current are controlled is connected.
As shown in Figure 1, the complete channels circuit 1 of embodiment and simplification channel circuit k(k=2, ..., n) also with the multi channel currents controller with MPPT function of embodiment, (be called for short: current controller) be connected, the current controller of embodiment has port vcj(j=2, ..., n), port vs, port vgj, port vsj, port vgaj, port viLj, port vioj, port vc, the port vc1 of the current controller of embodiment is connected with the anode of input voltage Vi1, the port vs of the current controller of embodiment is connected with the negative terminal of input voltage Vi1, the port vg1 of the current controller of embodiment is connected with the gate pole of N-MOS supervisor M1, the port vs1 of the current controller of embodiment is connected with the source electrode of N-MOS supervisor M1 and the source electrode of N-MOS auxiliary tube Ma1, the port vga1 of the current controller of embodiment is connected with the gate pole of N-MOS auxiliary tube Ma1, the detection signal of the current i L1 of the port viL1 receiving inductance L1 of the current controller of embodiment, the detection signal of the output current io1 of the complete channels circuit 1 of the port vio1 reception embodiment of the current controller of embodiment, the port vck(k=2 of the current controller of embodiment, ..., n) with the anode of input voltage Vik, be connected, the port vs of the current controller of embodiment is connected with the negative terminal of input voltage Vik, the port vgk of the current controller of embodiment is connected with the gate pole of N-MOS supervisor Mk, the port vsk of the current controller of embodiment is connected with the source electrode of N-MOS supervisor Mk, the port vgak of the current controller of embodiment is unsettled, the detection signal of the current i Lk of the port viLn receiving inductance Lk of the current controller of embodiment, the detection signal of the output current iok of the simplification channel circuit k of the port viok reception embodiment of the current controller of embodiment, the port vc of the DC-DC converting means that the port vc of the current controller of embodiment is controlled to input current sends the output total current information of the power major loop of embodiment.
As shown in Figure 2, the multi channel currents controller with MPPT function of embodiment comprise the 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 the output total current information vc of the power major loop of embodiment according to complete channels circuit 1 and the simplification channel circuit 2 of embodiment to the detection signal viol to vion of the output current io1 to ion that simplifies channel circuit n.The MPPT control module of embodiment can be according to complete channels circuit 1 and the simplification channel circuit k(k=2 of embodiment, n) the inductance L j(j=1 in,, the detection signal viLj of current i Lj n) and the control signal vgpj of input voltage Vij output N-MOS supervisor Mj and the control signal vapj of N-MOS auxiliary tube Maj.The metal-oxide-semiconductor driver element of embodiment receives the control signal vapj of the control signal vgpj of N-MOS supervisor Mj and N-MOS auxiliary tube Maj and converts to by port vgj, the port vsj of the multi channel currents controller with MPPT function of embodiment and the differential driving signal of port vgaj output.
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 form.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 comprised of summing circuit.The input end vj(j=1 of the summing circuit of embodiment, n) with the port vioj of the multi channel currents controller with MPPT function of embodiment, be connected, 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.
Under the control of the multi channel currents controller with MPPT function, the channel circuit j(of embodiment is complete channels circuit 1 or simplifies channel circuit k) always work in photovoltaic subarray j(j=1 ..., near maximum power point n).The characteristics of output power that is different from whole photovoltaic array under complex situations can present the multi-peak state, and the characteristics of output power of photovoltaic subarray keeps unimodal state of value usually.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: when 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.When the current output power of photovoltaic subarray j being detected than the output power of previous moment large (be vpij (n) > vpij (n-1)), by the output valve Vref1j (n) that reduces 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 that the current output power of photovoltaic subarray j approximates the output power of previous moment (being vpij (n) ≈ vpij (n-1)), reaches the maximum power point of photovoltaic subarray j.Now, channel circuit j(is complete channels circuit 1 or simplifies channel circuit k) be operated on off state, except directly the part energy of photovoltaic subarray j being sent to the controlled DC-DC converting means of input current, also by the auxiliary circuit formed by auxiliary capacitor Ca1, booster diode Da1, N-MOS auxiliary tube Ma1, coupling inductance La1 and Lb1, indirectly another part energy of photovoltaic subarray j is also sent to the controlled DC-DC converting means of input current, realize the function of energy feedback.
The described content of this instructions embodiment is only enumerating the way of realization of inventive concept; protection scope of the present invention should not be regarded as only limiting to the concrete form that embodiment states, protection scope of the present invention also reaches conceives the equivalent technologies means that can expect according to the present invention in those skilled in the art.
Claims (4)
1. the photovoltaic array MPPT interface circuit containing coupling inductance is characterized in that: the described photovoltaic array MPPT interface circuit containing coupling inductance is comprised of power major loop and multi channel currents controller 2 parts with MPPT function,
Described power major loop is comprised of to simplifying channel circuit n complete channels circuit 1 and simplification channel circuit 2, and described complete channels circuit 1 is by blocking diode Di1, input capacitance Ci1, inductance L 1, N-MOS is responsible for M1, diode D1, auxiliary capacitor Ca1, N-MOS auxiliary tube Ma1, coupling inductance La1 and Lb1, booster diode Da1, output capacitance Co1 forms, and the positive output end of photovoltaic subarray 1 is connected with the anode of blocking diode Di1, the anode of the negative electrode of blocking diode Di1 and input voltage Vi1, the end of input capacitance Ci1 and an end of inductance L 1 are connected, the other end of inductance L 1 is connected with the drain electrode of N-MOS supervisor M1 and the anode of diode D1, the negative electrode of diode D1 is connected with the end of auxiliary capacitor Ca1 and the end of coupling inductance La1, the other end of coupling inductance La1 is connected with the drain electrode of N-MOS auxiliary tube Ma1, the source electrode of N-MOS auxiliary tube Ma1 and the end of coupling inductance Lb1 (with the end of described coupling inductance La1 be different name end relation), the source electrode of N-MOS supervisor M1, the other end of auxiliary capacitor Ca1, the end of output capacitance Co1, the positive input terminal of the DC-DC converting means that the anode of output voltage V o and input current are controlled is connected, the other end of coupling inductance Lb1 (being different name end relation with the other end of described coupling inductance La1) is connected with the negative electrode of booster diode Da1, the output negative terminal of the anode of booster diode Da1 and photovoltaic subarray 1, the negative terminal of input voltage Vi1, the other end of input capacitance Ci1, the other end of output capacitance Co1, the negative input end of the DC-DC converting means that the negative terminal of output voltage V o and input current are controlled is connected, and the contact of the contact of coupling inductance Lb1 and booster diode Da1 and coupling inductance La1 and diode D1 is the Same Name of Ends relation,
Described simplification channel circuit k(k=2, ..., n) by blocking diode Dik, input capacitance Cik, inductance L k, N-MOS is responsible for Mk, diode Dk, output capacitance Cok forms, the positive output end of photovoltaic subarray k is connected with the anode of blocking diode Dik, the anode of the negative electrode of blocking diode Dik and input voltage Vik, the end of input capacitance Cik and the end of inductance L k are connected, the other end of inductance L k is connected with the drain electrode of N-MOS supervisor Mk and the anode of diode Dk, the negative electrode of diode Dk is connected with the negative electrode of diode D1 in described complete channels circuit 1, the source electrode of N-MOS supervisor Mk and the end of output capacitance Cok, the positive input terminal of the DC-DC converting means that the anode of output voltage V o and input current are controlled is connected, the negative output terminal of photovoltaic subarray k and the negative terminal of input voltage Vik, the other end of input capacitance Cik, the other end of output capacitance Cok, the negative input end of the DC-DC converting means that the negative terminal of output voltage V o and input current are controlled is connected,
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 vc1 of the multi channel currents controller of the described MPPT of having function is connected with the anode of described input voltage Vi1, 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 Vi1, the port vg1 of the multi channel currents controller of the described MPPT of having function is connected with the gate pole of described N-MOS supervisor M1, the port vs1 of the multi channel currents controller of the described MPPT of having function is connected with the source electrode of described N-MOS supervisor M1 and the source electrode of described N-MOS auxiliary tube Ma1, the port vga1 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 Ma1, the port viL1 of the multi channel currents controller of the described MPPT of having function receives the detection signal of the current i L1 of described inductance L 1, the port vio1 of the multi channel currents controller of the described MPPT of having function receives the detection signal of the output current io1 of described complete channels circuit 1, the port vc of the DC-DC converting means that the port vc of the multi channel currents controller of the described MPPT of having function is controlled to described input current sends the output total current information of described power major loop
The described port vck(k=2 with multi channel currents controller of MPPT function, ..., n) with the anode of described input voltage Vik, be connected, 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 Vik, the port vgk of the multi channel currents controller of the described MPPT of having function is connected with the gate pole of described N-MOS supervisor Mk, the port vsk of the multi channel currents controller of the described MPPT of having function is connected with the source electrode of described N-MOS supervisor Mk, the port vgak of the described multi channel currents controller with MPPT function is unsettled, the port viLk of the multi channel currents controller of the described MPPT of having function receives the detection signal of the current i Lk of described inductance L k, the port viok of the multi channel currents controller of the described MPPT of having function receives the detection signal of the output current iok of described simplification channel circuit k.
2. the photovoltaic array MPPT interface circuit containing coupling inductance as claimed in claim 1 is characterized in that: the multi channel currents controller of the described MPPT of having function comprises the 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) convert the described communication unit that confluxes, described MPPT control module, the required supply voltage of described metal-oxide-semiconductor driver element work to,
The described communication unit that confluxes can be exported the output total current information vc of described power major loop according to described complete channels circuit 1 and described simplification channel circuit 2 to the detection signal of the output current io1 to ion that simplifies channel circuit n,
Described MPPT control module can be according to described complete channels circuit 1 and described simplification channel circuit 2 to the inductance L j(j=1 simplified in channel circuit n, n) detection signal of current i Lj and described input voltage Vij export the control signal vgpj of described N-MOS supervisor 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.
3. the photovoltaic array MPPT interface circuit containing coupling inductance as claimed in claim 2, it is characterized in that: the MPPT control module of the multi channel currents controller of the described MPPT of having 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 forms, 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 the 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 as one of claim 2 and 3, it is characterized in that: the communication unit that confluxes of the multi channel currents controller of the described MPPT of having function is comprised of summing circuit, the input end vj(j=1 of described summing circuit, n) with the port vioj of the multi channel currents controller of the described MPPT of having function, be connected, 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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