CN103516305A - Photovoltaic array MPPT interface circuit containing three-winding coupling inductors - Google Patents
Photovoltaic array MPPT interface circuit containing three-winding coupling inductors Download PDFInfo
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Abstract
A photovoltaic array MPPT interface circuit containing three-winding coupling inductors is formed by a power main loop and a multi-channel current controller having an MPPT function. The power main loop is composed of n channel circuits. The multi-channel current controller matched with the power main loop and having 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. The photovoltaic array MPPT interface circuit can be applied to an all-weather photovoltaic power generation system, is placed at the back of a photovoltaic array and in front of a DC-DC conversion device outputting controllable currents, not only can capture the maximum power point of the overall situation of the photovoltaic array under a complicated condition accurately, stably and quickly, but also has capacity of feeding back excess energy of the photovoltaic array MPPT interface circuit to the back stage DC-DC conversion device outputting controllable currents, and can efficiently achieve maximization of the utilization rate of the photovoltaic array.
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 that contains three winding coupled inductance.
Background technology
Photovoltaic generating system utilizes semi-conductive photovoltaic effect to change luminous energy into available electric energy.Photovoltaic array is photovoltaic generating system Zhong core.Conventionally, 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 power output of photovoltaic array and array structure, load, solar irradiance, temperature, efficiency are closely related, and especially in round-the-clock situation, 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 multi-peak state, existing centralized MPPT technology is just 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 utilance 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 present invention adopts distributed MPPT technology to propose a kind of photovoltaic array MPPT interface circuit that contains three winding coupled 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 utilance.
The technical solution adopted for the present invention to solve the technical problems is: a kind of photovoltaic array MPPT interface circuit that contains three winding coupled inductance is comprised of power major loop and multi channel currents controller 2 parts with MPPT function.
Described power major loop is comprised of n channel circuit (channel circuit 1 is to channel circuit n), it is characterized in that: described channel circuit j (j=1, n) by blocking diode Dij, input capacitance Cij, inductance L j, N-MOS is responsible for Mj, N-MOS auxiliary tube Maj, three winding coupled inductance L aj and Lbj and Lcj, booster diode Daj, booster diode Dbj, booster diode Dcj, TVS manages TVSj, output capacitance Coj forms, 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 input capacitance Cij one end and inductance L j is connected, the drain electrode of the other end of inductance L j and N-MOS supervisor Mj, the negative electrode of three winding coupled inductance L aj one end and TVS pipe TVSj is connected, the other end of three winding coupled inductance L aj is connected with the anode of booster diode Daj, the negative electrode of booster diode Daj is connected with the drain electrode of N-MOS auxiliary tube Maj, the source electrode of the source electrode of N-MOS auxiliary tube Maj and N-MOS supervisor Mj, three winding coupled inductance L bj one end (with described three winding coupled inductance L aj one end are different name end relations), three winding coupled inductance L cj one end (with described three winding coupled inductance L aj one end are Same Name of Ends relations), the anode of TVS pipe TVSj, output capacitance Coj one end, 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 three winding coupled inductance L bj (being different name end relation with the other end of described three winding coupled inductance L aj) is connected with the negative electrode of booster diode Dbj, the other end of three winding coupled inductance L cj (being Same Name of Ends relation with the other end of described three winding coupled inductance L aj) is connected with the negative electrode of booster diode Dcj, the anode of the anode of booster diode Dbj and booster diode Dcj, the output negative terminal of 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 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 three winding coupled inductance L cj and booster diode Dcj and three winding coupled inductance L aj and booster diode Daj is Same Name of Ends relation, the contact of the contact of three winding coupled inductance L bj and booster diode Dbj and three winding coupled inductance L aj and booster diode Daj is different name end relation,
Described channel circuit j (j=1, n) also (be called for short: current controller) be connected with the multi channel currents 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 channel circuit j, the port vioj of described current controller receives the detection signal of the output current ioj of described channel 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 unit 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 unit, the required supply voltage of described metal-oxide-semiconductor driver element work
The described communication unit that confluxes can be exported according to described channel 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 channel circuit n,
Described MPPT control unit can be according to described channel circuit j (j=1, n) the detection signal viLj of the current i Lj of the inductance L j in 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 unit 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 j, subtracter 1j, subtracter 2j, triangular-wave generator j, comparator j, inverter j forms, it is characterized in that: the input 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 of described sampling holder 1j is connected with an input of described multiplier j and the input of described amplifier 1j, the input 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 of described sampling holder 2j is connected with another input of described multiplier j, the output of described multiplier j is connected with the positive input terminal of described subtracter 1j and the input of described delay circuit j, the output of described delay circuit j is connected with the negative input end of described subtracter 1j, the output of described subtracter 1j is connected with the input of described reference voltage source j, the output of described reference voltage source j is connected with the negative input end of described subtracter 2j, the positive input terminal of described subtracter 2j is connected with the output of described amplifier 1j, the output of described subtracter 2j is connected with the input of described amplifier 2j, the output of described amplifier 2j is connected with the inverting input of described comparator 1j, the output of described triangular-wave generator j is connected with the normal phase input end of described comparator j, described comparator j exports the control signal vgpj of described N-MOS supervisor Mj, the output of described comparator j is connected with the input of inverter j, inverter j 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 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 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 power output under complex situations is got to global maximum problem reduction and become the unimodal value of each photovoltaic subarray power output 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 three winding coupled inductance, realize the maximization of photovoltaic array utilance.
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 three winding coupled 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 utilance.
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 unit 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.
Fig. 5 be inductance L j (j=1 ..., n) the exemplary operation oscillogram of the channel circuit j of the embodiment of the present invention in current continuity state and three winding coupled inductance L aj and Lbj and the situation of Lcj in discontinuous current state.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
With reference to figure 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, 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 comprised of to channel circuit n channel circuit 1.Channel circuit j (the j=1 of embodiment, n) by blocking diode Dij, input capacitance Cij, inductance L j, N-MOS is responsible for Mj, N-MOS auxiliary tube Maj, three winding coupled inductance L aj and Lbj and Lcj, booster diode Daj, booster diode Dbj, booster diode Dcj, TVS manages TVSj, output capacitance Coj forms, 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 input capacitance Cij one end and inductance L j is connected, the drain electrode of the other end of inductance L j and N-MOS supervisor Mj, the negative electrode of three winding coupled inductance L aj one end and TVS pipe TVSj is connected, the other end of three winding coupled inductance L aj is connected with the anode of booster diode Daj, the negative electrode of booster diode Daj is connected with the drain electrode of N-MOS auxiliary tube Maj, the source electrode of the source electrode of N-MOS auxiliary tube Maj and N-MOS supervisor Mj, three winding coupled inductance L bj one end (with described three winding coupled inductance L aj one end are different name end relations), three winding coupled inductance L cj one end (with described three winding coupled inductance L aj one end are Same Name of Ends relations), the anode of TVS pipe TVSj, output capacitance Coj one end, 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 three winding coupled inductance L bj (being different name end relation with the other end of described three winding coupled inductance L aj) is connected with the negative electrode of booster diode Dbj, the other end of three winding coupled inductance L cj (being Same Name of Ends relation with the other end of described three winding coupled inductance L aj) is connected with the negative electrode of booster diode Dcj, the anode of the anode of booster diode Dbj and booster diode Dcj, the output negative terminal of 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 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 three winding coupled inductance L cj and booster diode Dcj and three winding coupled inductance L aj and booster diode Daj is Same Name of Ends relation, the contact of the contact of three winding coupled inductance L bj and booster diode Dbj and three winding coupled inductance L aj and booster diode Daj is different name end relation.
As shown in Figure 1, channel circuit j (the j=1 of embodiment, n) also (be called for short: current controller) be connected with the multi channel currents controller with MPPT function 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 detection signal of the output current ioj of the port vioj receive path circuit j of the current controller of embodiment, the port vc of the current controller of embodiment sends the output total current information of the power major loop of embodiment 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 unit and metal-oxide-semiconductor driver element.The accessory power supply unit of embodiment can input voltage Vij (j=1 ..., n) convert the communication unit that confluxes, MPPT control unit 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 channel 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 unit of embodiment can be according to the channel circuit j (j=1 of embodiment,, the detection signal viLj of the current i Lj of the inductance L j in 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 unit 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 j, subtracter 1j, subtracter 2j, triangular-wave generator j, comparator j, inverter j form.The input 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 of the output of sampling holder 1j and multiplier j and the input of amplifier 1j are connected, the input of sampling holder 2j is connected with the port vcj of the multi channel currents controller with MPPT function of embodiment, the output of sampling holder 2j is connected with another input of multiplier j, the output of multiplier j is connected with the positive input terminal of subtracter 1j and the input of delay circuit j, the output of delay circuit j is connected with the negative input end of subtracter 1j, the output of subtracter 1j is connected with the input of reference voltage source j, the output of reference voltage source j is connected with the negative input end of subtracter 2j, the positive input terminal of subtracter 2j is connected with the output of amplifier 1j, the output of subtracter 2j is connected with the input of amplifier 2j, the output of amplifier 2j is connected with the inverting input of comparator j, the output of triangular-wave generator j is connected with the normal phase input end of comparator j, the control signal vgpj of the N-MOS supervisor Mj of comparator j output embodiment, the output of comparator j is connected with the input of inverter j, the control signal vapj of the N-MOS auxiliary tube Maj of inverter j 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.Input vj (the 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 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 be inductance L j (j=1 ..., n) the exemplary operation oscillogram of the channel circuit j of embodiment in current continuity state and three winding coupled inductance L aj and Lbj and the situation of Lcj in discontinuous current state.Inductance L j (j=1 ..., n) in current continuity state and three winding coupled inductance L aj and Lbj and the situation of Lcj in discontinuous current state the channel circuit j of embodiment (j=1 ..., steady operation process n) comprises following 2 stages.
Stage 1:N-MOS supervisor Mj (j=1 ..., n) conducting, N-MOS auxiliary tube Maj turn-offs (the current i Laj=0 of three winding coupled inductance L aj).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 Yi Ge loop.Now, the voltage vLj ≈ Vij-Vo at inductance L j two ends > 0, inductance L j charging, current i Lj and current i Mj all increase.Booster diode Daj cut-off, booster diode Dbj conducting, booster diode Dcj cut-off, booster diode Dbj, three winding coupled inductance L bj, output capacitance Coj and the controlled DC-DC converting means of input current form another loop.Now, three winding coupled inductance L bj electric discharges, current i Lbj reduces until be zero, the magnetic energy of preservation all to be fed back to the controlled DC-DC converting means of input current.
Stage 2:N-MOS supervisor Mj (j=1 ..., n) turn-off (the current i Mj=0 of N-MOS supervisor Mj), N-MOS auxiliary tube Maj conducting.Booster diode Daj conducting, the controlled DC-DC converting means of photovoltaic subarray j, blocking diode Dij, input capacitance Cij, inductance L j, three winding coupled inductance L aj, booster diode Daj, N-MOS auxiliary tube Maj, output capacitance Coj and input current forms Yi Ge loop.Booster diode Dbj cut-off, booster diode Dcj conducting, booster diode Dcj, three winding coupled inductance L cj, output capacitance Coj and the controlled DC-DC converting means of input current form another loop.Now, voltage vLj ≈ Vij – (k+1) * Vo < 0 at inductance L j two ends, k is the turn ratio between three winding coupled inductance L aj and Lcj, inductance L j electric discharge, current i Lj and current i Laj all reduce.Three winding coupled inductance L aj are converted into a part for unnecessary electric energy in channel circuit j magnetic energy and preserve, and in channel circuit j, another part of unnecessary electric energy directly feeds back to the controlled DC-DC converting means of input current by three winding coupled inductance L cj.
Under the control of multi channel currents controller with MPPT function, the channel circuit j of embodiment (j=1 ..., 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 photovoltaic subarray 1 to the maximum power point of 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 power output of photovoltaic subarray j being detected than the power output of previous moment little (being vpij (n) < vpij (n-1)), by increasing the output valve Vrefj (n) of reference voltage source j, make the duty ratio of the control signal vgpj of N-MOS supervisor Mj increase, make the output current of photovoltaic subarray j become large, thus the power output in a moment after change photovoltaic subarray j.When the current power output of photovoltaic subarray j being detected than the power output of previous moment large (be vpij (n) > vpij (n-1)), by reducing the output valve Vrefj (n) of reference voltage source j, make the duty ratio of the control signal vgpj of N-MOS supervisor Mj reduce, the output current of photovoltaic subarray j is diminished, thus the power output in a moment after change photovoltaic subarray j.By regulating, finally realize the power output (being vpij (n) ≈ vpij (n-1)) that the current power output of photovoltaic subarray j approximates previous moment, reach the maximum power point of photovoltaic subarray j.
TVS pipe TVSj (j=1 ..., in the effect containing in the photovoltaic array MPPT interface circuit of three winding coupled inductance, be n): when N-MOS supervisor Mj and N-MOS auxiliary tube Maj all turn-off, for inductance L j provides necessary current channel, to prevent overvoltage.Booster diode Daj, booster diode Dbj, booster diode Dcj in the effect containing in the photovoltaic array MPPT interface circuit of three winding coupled inductance are: the direction that limits current i Laj and iLbj and the iLcj of three winding coupled inductance L aj and Lbj and Lcj, prevent that circulation from appearring in circuit, guarantee circuit high-efficiency operation.
Content described in this specification 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 is also and in those skilled in the art, according to the present invention, conceive the equivalent technologies means that can expect.
Claims (4)
1. containing a photovoltaic array MPPT interface circuit for three winding coupled inductance, it is characterized in that: the described photovoltaic array MPPT interface circuit that contains three winding coupled inductance is comprised of power major loop and multi channel currents controller 2 parts with MPPT function,
Described channel circuit j (j=1, n) by blocking diode Dij, input capacitance Cij, inductance L j, N-MOS is responsible for Mj, N-MOS auxiliary tube Maj, three winding coupled inductance L aj and Lbj and Lcj, booster diode Daj, booster diode Dbj, booster diode Dcj, TVS manages TVSj, output capacitance Coj forms, 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 input capacitance Cij one end and inductance L j is connected, the drain electrode of the other end of inductance L j and N-MOS supervisor Mj, the negative electrode of three winding coupled inductance L aj one end and TVS pipe TVSj is connected, the other end of three winding coupled inductance L aj is connected with the anode of booster diode Daj, the negative electrode of booster diode Daj is connected with the drain electrode of N-MOS auxiliary tube Maj, the source electrode of the source electrode of N-MOS auxiliary tube Maj and N-MOS supervisor Mj, three winding coupled inductance L bj one end (with described three winding coupled inductance L aj one end are different name end relations), three winding coupled inductance L cj one end (with described three winding coupled inductance L aj one end are Same Name of Ends relations), the anode of TVS pipe TVSj, output capacitance Coj one end, 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 three winding coupled inductance L bj (being different name end relation with the other end of described three winding coupled inductance L aj) is connected with the negative electrode of booster diode Dbj, the other end of three winding coupled inductance L cj (being Same Name of Ends relation with the other end of described three winding coupled inductance L aj) is connected with the negative electrode of booster diode Dcj, the anode of the anode of booster diode Dbj and booster diode Dcj, the output negative terminal of 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 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 three winding coupled inductance L cj and booster diode Dcj and three winding coupled inductance L aj and booster diode Daj is Same Name of Ends relation, the contact of the contact of three winding coupled inductance L bj and booster diode Dbj and three winding coupled inductance L aj and booster diode Daj is different name end 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 channel 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 that contains three winding coupled inductance as claimed in claim 1, it 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 unit and metal-oxide-semiconductor driver element
Described accessory power supply unit can described input voltage Vij (j=1 ..., n) conflux described in converting to communication unit, described MPPT control unit, the required supply voltage of described metal-oxide-semiconductor driver element work,
The described communication unit that confluxes can be exported according to described channel circuit 1 to the detection signal of the output current io1 to ion of channel circuit n the output total current information vc of described power major loop,
Described MPPT control unit can be according to described channel circuit j (j=1, n) detection signal of the current i Lj of the inductance L j in 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.
3. the photovoltaic array MPPT interface circuit that contains three winding coupled inductance as claimed in claim 2, it is characterized in that: described in there is MPPT function the MPPT control unit 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 j, subtracter 1j, subtracter 2j, triangular-wave generator j, comparator j, inverter j forms, the input 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 of described sampling holder 1j is connected with an input of described multiplier j and the input of described amplifier 1j, the input 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 of described sampling holder 2j is connected with another input of described multiplier j, the output of described multiplier j is connected with the positive input terminal of described subtracter 1j and the input of described delay circuit j, the output of described delay circuit j is connected with the negative input end of described subtracter 1j, the output of described subtracter 1j is connected with the input of described reference voltage source j, the output of described reference voltage source j is connected with the negative input end of described subtracter 2j, the positive input terminal of described subtracter 2j is connected with the output of described amplifier 1j, the output of described subtracter 2j is connected with the input of described amplifier 2j, the output of described amplifier 2j is connected with the inverting input of described comparator 1j, the output of described triangular-wave generator j is connected with the normal phase input end of described comparator j, described comparator j exports the control signal vgpj of described N-MOS supervisor Mj, the output of described comparator j is connected with the input of inverter j, inverter j exports the control signal vapj of described N-MOS auxiliary tube Maj.
As described in one of claim 2 and 3 containing the photovoltaic array MPPT interface circuit of three winding coupled inductance, it is characterized in that: described in there is the multi channel currents controller of MPPT function the communication unit that confluxes by summing circuit, formed, input vj (the 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 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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| CN101741273A (en) * | 2009-12-30 | 2010-06-16 | 扬州大学 | Coupling inductance type double Boost inverter circuits in photovoltaic system |
| US20120043818A1 (en) * | 2010-08-18 | 2012-02-23 | Volterra Semiconductor Corporation | Switching Circuits For Extracting Power From An Electric Power Source And Associated Methods |
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| CN203632610U (en) * | 2013-08-28 | 2014-06-04 | 浙江工业大学 | Photovoltaic array MPPT interface circuit containing three-winding coupling inductors |
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| CN101741273A (en) * | 2009-12-30 | 2010-06-16 | 扬州大学 | Coupling inductance type double Boost inverter circuits in photovoltaic system |
| US20120043818A1 (en) * | 2010-08-18 | 2012-02-23 | Volterra Semiconductor Corporation | Switching Circuits For Extracting Power From An Electric Power Source And Associated Methods |
| CN103166239A (en) * | 2011-12-09 | 2013-06-19 | 上海康威特吉能源技术有限公司 | Centralized-distributed mixed novel energy power generation system and maximum power point tracking control method |
| CN203632610U (en) * | 2013-08-28 | 2014-06-04 | 浙江工业大学 | Photovoltaic array MPPT interface circuit containing three-winding coupling inductors |
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