CN103516305B - Containing the photovoltaic array MPPT interface circuit of three winding coupling inductance - Google Patents
Containing the photovoltaic array MPPT interface circuit of three winding coupling inductance Download PDFInfo
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Abstract
A kind of photovoltaic array MPPT interface circuit containing three winding coupling inductance is made up of power main loop and multi channel currents controller 2 part with MPPT function.Described power main loop is made up of n channel circuit.Mate with described power main loop, described in there is MPPT function multi channel currents controller have port vcj, port vs, port vgj, port vsj, port vgaj, port viLj, port vioj, port vc.The present invention can be applicable to round-the-clock photovoltaic generating system, after being placed in photovoltaic array, before the controlled DC-DC converting means of input current, not only can capture the global maximum power point of photovoltaic array under complex situations accurately, steadily, rapidly, but also there is the ability excess energy in self circuit being fed back to the controlled DC-DC converting means of rear class input current, the maximization of photovoltaic array utilance can be realized expeditiously.
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 three winding coupling inductance.
Background technology
Photovoltaic generating system utilizes the photovoltaic effect of semiconductor 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 multiple blocking diode by the photovoltaic subarray (or photovoltaic module) of multiple identical or different specification, 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 photovoltaic subarray specification is different or photovoltaic subarray specification is identical but the situations such as shelter from heat or light in local, short circuit, open circuit) photovoltaic array can present complicated multi-peak state.When the characteristics of output power of photovoltaic array presents single peak state, existing centralized maximal power tracing (MPPT) technology can both capture the maximum power point of the overall situation 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 the maximum power point ensureing accurately, capture steadily, rapidly local.When the maximum power point of local is not same point with the maximum power point of the overall situation, 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 containing three winding coupling inductance, object is to help round-the-clock photovoltaic generating system to capture the global maximum power point of photovoltaic array accurately, steadily, rapidly, 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 containing three winding coupling inductance is made up of power main loop and multi channel currents controller 2 part with MPPT function.
By n channel circuit, (channel circuit 1 to channel circuit n) forms described power main loop, 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 coupling inductance Laj and Lbj and Lcj, booster diode Daj, booster diode Dbj, booster diode Dcj, TVS pipe TVSj, output capacitance Coj is formed, the positive output end of photovoltaic subarray j is connected with the anode of blocking diode Dij, the negative electrode of blocking diode Dij and the anode of input voltage Vij, one end of input capacitance Cij and one end of inductance L j are connected, the other end of inductance L j and N-MOS are responsible for the drain electrode of Mj, one end of three winding coupling inductance Laj and the negative electrode of TVS pipe TVSj are connected, the other end of three winding coupling inductance Laj 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 N-MOS auxiliary tube Maj and N-MOS are responsible for the source electrode of Mj, one end of three winding coupling inductance Lbj (be different name end relation with one end of described three winding coupling inductance Laj), one end of three winding coupling inductance Lcj (be Same Name of Ends relation with one end of described three winding coupling inductance Laj), the anode of TVS pipe TVSj, one end of output capacitance Coj, the positive input terminal of the anode of output voltage Vo and the controlled DC-DC converting means of input current is connected, the other end of three winding coupling inductance Lbj (be different name end relation with the other end of described three winding coupling inductance Laj) is connected with the negative electrode of booster diode Dbj, the other end of three winding coupling inductance Lcj (be Same Name of Ends relation with the other end of described three winding coupling inductance Laj) is connected with the negative electrode of booster diode Dcj, the anode of booster diode Dbj and the anode of 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 negative terminal of output voltage Vo and the controlled DC-DC converting means of input current is connected, the contact of three winding coupling inductance Lcj and booster diode Dcj and the contact of three winding coupling inductance Laj and booster diode Daj are Same Name of Ends relations, the contact of three winding coupling inductance Lbj and booster diode Dbj and the contact of three winding coupling inductance Laj and booster diode Daj are different name end relations,
Described channel 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 gate pole that port vgj and the described N-MOS of described current controller are responsible for Mj is connected, the source electrode of source electrode and described N-MOS auxiliary tube Maj that port vsj and the described N-MOS of described current controller are responsible for Mj is connected, 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 main 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 Auxiliary Power Units, the communication unit that confluxes, MPPT control unit and metal-oxide-semiconductor driver element, it is characterized in that: described Auxiliary Power Units can described input voltage Vij (j=1, n) convert to described in conflux communication unit, described MPPT control unit, supply voltage needed for the work of described metal-oxide-semiconductor driver element
The described communication unit that confluxes can export the output total current information vc of described power main loop according to the detection signal viol to vion of the output current io1 to ion of described channel circuit 1 to channel circuit n,
Described MPPT control unit can according to described channel circuit j (j=1, the detection signal viLj of the current i Lj of the inductance L j n) and described input voltage Vij exports described N-MOS and is responsible for the 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 responsible for Mj (j=1 described N-MOS,, the control signal vapj of control signal vgpj n) and described N-MOS auxiliary tube Maj converts to has port vgj, the port vsj of the multi channel currents controller of MPPT function and the differential driving signal of port vgaj output by described.
Further, the described MPPT control unit with the multi channel currents controller of 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 the input of an input of described multiplier j and 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 input of the positive input terminal of described subtracter 1j and 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 that described N-MOS is responsible for 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 made up 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 photovoltaic array power output whole under complex situations is got global maximum problem reduction and become the single peak of each photovoltaic subarray power output to get max problem, propose to adopt the overall MPPT problem solving photovoltaic array under round-the-clock complex situations containing the photovoltaic array MPPT interface circuit of three winding coupling 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 coupling inductance, before the DC-DC converting means that input current is controlled, it not only can be accurate, steadily, (comprise that photovoltaic subarray specification is different or photovoltaic subarray specification is identical but shelter from heat or light in local under capturing complex situations rapidly, short circuit, the situations such as open circuit) global maximum power point of photovoltaic array, but also there is the ability excess energy in self circuit being fed back to the controlled DC-DC converting means of rear class input current, the maximization of photovoltaic array utilance can be realized expeditiously.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the embodiment of the present invention.
Fig. 2 is the functional block diagram with the multi channel currents controller of MPPT function of the embodiment of the present invention.
Fig. 3 is the circuit diagram with the MPPT control unit of the multi channel currents controller of MPPT function of the embodiment of the present invention.
Fig. 4 is the circuit diagram with the communication unit that confluxes of the multi channel currents controller of MPPT function of the embodiment of the present invention.
Fig. 5 be inductance L j (j=1 ..., n) be in the exemplary operation oscillogram of the channel circuit j of embodiment of the present invention when current continuity state and three winding coupling inductance Laj and Lbj and Lcj are 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 made up of power main loop and multi channel currents controller 2 part with MPPT function.
As shown in Figure 1, the power main loop of embodiment is made up of channel circuit 1 to channel circuit n.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 coupling inductance Laj and Lbj and Lcj, booster diode Daj, booster diode Dbj, booster diode Dcj, TVS pipe TVSj, output capacitance Coj is formed, the positive output end of photovoltaic subarray j is connected with the anode of blocking diode Dij, the negative electrode of blocking diode Dij and the anode of input voltage Vij, one end of input capacitance Cij and one end of inductance L j are connected, the other end of inductance L j and N-MOS are responsible for the drain electrode of Mj, one end of three winding coupling inductance Laj and the negative electrode of TVS pipe TVSj are connected, the other end of three winding coupling inductance Laj 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 N-MOS auxiliary tube Maj and N-MOS are responsible for the source electrode of Mj, one end of three winding coupling inductance Lbj (be different name end relation with one end of described three winding coupling inductance Laj), one end of three winding coupling inductance Lcj (be Same Name of Ends relation with one end of described three winding coupling inductance Laj), the anode of TVS pipe TVSj, one end of output capacitance Coj, the positive input terminal of the anode of output voltage Vo and the controlled DC-DC converting means of input current is connected, the other end of three winding coupling inductance Lbj (be different name end relation with the other end of described three winding coupling inductance Laj) is connected with the negative electrode of booster diode Dbj, the other end of three winding coupling inductance Lcj (be Same Name of Ends relation with the other end of described three winding coupling inductance Laj) is connected with the negative electrode of booster diode Dcj, the anode of booster diode Dbj and the anode of 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 negative terminal of output voltage Vo and the controlled DC-DC converting means of input current is connected, the contact of three winding coupling inductance Lcj and booster diode Dcj and the contact of three winding coupling inductance Laj and booster diode Daj are Same Name of Ends relations, the contact of three winding coupling inductance Lbj and booster diode Dbj and the contact of three winding coupling inductance Laj and booster diode Daj are different name end relations.
As shown in Figure 1, channel circuit j (the j=1 of embodiment, n) be also connected with the multi channel currents controller (being called for short: current 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 gate pole of port vgj and the N-MOS supervisor Mj of the current controller of embodiment is connected, the source electrode of port vsj and N-MOS supervisor Mj and the source electrode of N-MOS auxiliary tube Maj of the current controller of embodiment are connected, 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 main 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 Auxiliary Power Units, the communication unit that confluxes, MPPT control unit and metal-oxide-semiconductor driver element.The Auxiliary Power Units of embodiment can input voltage Vij (j=1 ..., n) convert the communication unit that confluxes, MPPT control unit and the supply voltage needed for the work of metal-oxide-semiconductor driver element to.The communication unit that confluxes of embodiment can export the output total current information vc of the power main loop of embodiment according to the detection signal viol to vion of the output current io1 to ion of channel circuit 1 to the complete channels circuit n of embodiment.The MPPT control unit of embodiment can according to the channel circuit j (j=1 of embodiment,, the detection signal viLj of the current i Lj of the inductance L j n) and input voltage Vij exports N-MOS and is responsible for the 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 N-MOS and is responsible for the control signal vgpj of Mj and the control signal vapj of N-MOS auxiliary tube Maj and converts the differential driving signal exported by the port vgj with the multi channel currents controller of MPPT function, the port vsj of embodiment and port vgaj to.
As shown in Figure 3, the MPPT control unit with the multi channel currents controller of 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 with the multi channel currents controller of MPPT function of embodiment, the output of sampling holder 1j is connected with the input of an input of multiplier j and amplifier 1j, the input of sampling holder 2j is connected with the port vcj with the multi channel currents controller of 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 input of the positive input terminal of subtracter 1j and 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, comparator j exports the control signal vgpj of the N-MOS supervisor Mj of embodiment, the output of comparator j is connected with the input of inverter j, inverter j exports the control signal vapj of the N-MOS auxiliary tube Maj of embodiment.
As shown in Figure 4, the communication unit that confluxes with the multi channel currents controller of MPPT function of embodiment is made up of summing circuit.Input vj (the j=1 of the summing circuit of embodiment, n) be connected with the port vioj with the multi channel currents controller of MPPT function of embodiment, the input of the summing circuit of embodiment is connected with the port vc with the multi channel currents controller of MPPT function of embodiment.
Fig. 5 be inductance L j (j=1 ..., n) be in the exemplary operation oscillogram of the channel circuit j of embodiment when current continuity state and three winding coupling inductance Laj and Lbj and Lcj are in discontinuous current state.At inductance L j (j=1, n) be in embodiment when current continuity state and three winding coupling inductance Laj and Lbj and Lcj are in discontinuous current state channel circuit j (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 turns off (the current i Laj=0 of three winding coupling inductance Laj).The DC-DC converting means that photovoltaic subarray j, blocking diode Dij, input capacitance Cij, inductance L j, N-MOS are responsible for Mj, output capacitance Coj and input current controlled forms a loop.Now, the voltage vLj ≈ Vij-Vo>0 at inductance L j two ends, inductance L j charge, and current i Lj and current i Mj all increases.Booster diode Daj cut-off, booster diode Dbj conducting, booster diode Dcj end, and the controlled DC-DC converting means of booster diode Dbj, three winding coupling inductance Lbj, output capacitance Coj and input current forms another loop.Now, three winding coupling inductance Lbj discharges, and current i Lbj reduces until be zero, the magnetic energy of preservation is all fed back to the DC-DC converting means that input current is controlled.
Stage 2:N-MOS supervisor Mj (j=1 ..., n) turn off (the current i Mj=0 that N-MOS is responsible for 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 coupling inductance Laj, booster diode Daj, N-MOS auxiliary tube Maj, output capacitance Coj and input current forms a loop.Booster diode Dbj ends, booster diode Dcj conducting, and the controlled DC-DC converting means of booster diode Dcj, three winding coupling inductance Lcj, output capacitance Coj and input current forms another loop.Now, voltage vLj ≈ Vij – (k+1) at inductance L j two ends × Vo<0, k is the turn ratio between three winding coupling inductance Laj and Lcj, and inductance L j discharges, and current i Lj and current i Laj all reduces.A part for electric energy unnecessary in channel circuit j is converted into magnetic energy and preserves by three winding coupling inductance Laj, and in channel circuit j, another part of unnecessary electric energy then directly feeds back to the controlled DC-DC converting means of input current by three winding coupling inductance Lcj.
Under the control of multi channel currents controller with MPPT function, the channel circuit j of embodiment (j=1 ..., near maximum power point n) always working in photovoltaic subarray j.Under being different from complex situations, the characteristics of output power of whole photovoltaic array can present multi-peak state, and the characteristics of output power of photovoltaic subarray keeps single peak state usually.Therefore, as long as capture the maximum power point of photovoltaic subarray 1 to photovoltaic subarray n respectively, the global maximum power point of whole photovoltaic array can be obtained.The strategy of the maximum power point of capture photovoltaic subarray j is as follows: when current power output less than the power output of previous moment (i.e. vpij (n) <vpij (n-1)) of photovoltaic subarray j being detected, by increasing the output valve Vrefj (n) of reference voltage source j, the duty ratio making N-MOS be responsible for the control signal vgpj of Mj increases, the output current of photovoltaic subarray j is made to become large, thus the power output in a moment after changing photovoltaic subarray j.When power output large (i.e. vpij (n) >vpij (n-1)) of the current power output of photovoltaic subarray j than previous moment being detected, by reducing the output valve Vrefj (n) of reference voltage source j, the duty ratio making N-MOS be responsible for the control signal vgpj of Mj reduces, the output current of photovoltaic subarray j is diminished, thus the power output in a moment after changing photovoltaic subarray j.By regulating, finally realizing the power output (i.e. vpij (n) ≈ vpij (n-1)) that the current power output of photovoltaic subarray j approximates previous moment, reaching the maximum power point of photovoltaic subarray j.
TVS pipe TVSj (j=1, n) containing the effect in the photovoltaic array MPPT interface circuit of three winding coupling inductance be: when N-MOS supervisor Mj and N-MOS auxiliary tube Maj all turns off, for inductance L j provides necessary current channel, to prevent overvoltage.Booster diode Daj, booster diode Dbj, booster diode Dcj containing the effect in the photovoltaic array MPPT interface circuit of three winding coupling inductance are being: limit the current i Laj of three winding coupling inductance Laj and Lbj and Lcj and the direction of iLbj and iLcj, prevent circuit from occurring circulation, ensure circuit high-efficiency operation.
Content described in this specification embodiment is only enumerating the way of realization of inventive concept; should not being regarded as of protection scope of the present invention is only limitted to the concrete form that embodiment is stated, protection scope of the present invention also and conceive the equivalent technologies means that can expect according to the present invention in those skilled in the art.
Claims (4)
1. containing a photovoltaic array MPPT interface circuit for three winding coupling inductance, it is characterized in that: the described photovoltaic array MPPT interface circuit containing three winding coupling inductance is made up of power main loop and multi channel currents controller 2 part with MPPT function,
Described power main loop is made up of channel circuit 1 to channel circuit n, described channel circuit j is by blocking diode Dij, input capacitance Cij, inductance L j, N-MOS is responsible for Mj, N-MOS auxiliary tube Maj, three winding coupling inductance Laj and Lbj and Lcj, booster diode Daj, booster diode Dbj, booster diode Dcj, TVS pipe TVSj, output capacitance Coj is formed, wherein the value of j is j=1, n, the positive output end of photovoltaic subarray j is connected with the anode of blocking diode Dij, the negative electrode of blocking diode Dij and the anode of input voltage Vij, one end of input capacitance Cij and one end of inductance L j are connected, the other end of inductance L j and N-MOS are responsible for the drain electrode of Mj, one end of three winding coupling inductance Laj and the negative electrode of TVS pipe TVSj are connected, the other end of three winding coupling inductance Laj 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 N-MOS auxiliary tube Maj and N-MOS are responsible for the source electrode of Mj, one end of three winding coupling inductance Lbj, one end of three winding coupling inductance Lcj, the anode of TVS pipe TVSj, one end of output capacitance Coj, the positive input terminal of the anode of output voltage Vo and the controlled DC-DC converting means of input current is connected, one end of described three winding coupling inductance Lbj and one end of described three winding coupling inductance Laj are different name end relations, one end of described three winding coupling inductance Lcj and one end of described three winding coupling inductance Laj are Same Name of Ends relations, the other end of three winding coupling inductance Lbj is connected with the negative electrode of booster diode Dbj, the other end of described three winding coupling inductance Lbj and the other end of described three winding coupling inductance Laj are different name end relations, the other end of three winding coupling inductance Lcj is connected with the negative electrode of booster diode Dcj, the other end of described three winding coupling inductance Lcj and the other end of described three winding coupling inductance Laj are Same Name of Ends relations, the anode of booster diode Dbj and the anode of 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 negative terminal of output voltage Vo and the controlled DC-DC converting means of input current is connected, the contact of three winding coupling inductance Lcj and booster diode Dcj and the contact of three winding coupling inductance Laj and booster diode Daj are Same Name of Ends relations, the contact of three winding coupling inductance Lbj and booster diode Dbj and the contact of three winding coupling inductance Laj and booster diode Daj are different name end relations,
The multi channel currents controller of the described MPPT of having function has port vcj, port vs, port vgj, port vsj, port vgaj, port viLj, port vioj, port vc, wherein the value of j is j=1, n, 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 gate pole that port vgj and the described N-MOS of the multi channel currents controller of the described MPPT of having function are responsible for Mj is connected, the source electrode of source electrode and described N-MOS auxiliary tube Maj that port vsj and the described N-MOS of the multi channel currents controller of the described MPPT of having function are responsible for Mj is connected, 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 main loop to the port vc of the controlled DC-DC converting means of described input current.
2. the photovoltaic array MPPT interface circuit containing three winding coupling inductance as claimed in claim 1, it is characterized in that: described in there is MPPT function multi channel currents controller comprise Auxiliary Power Units, the communication unit that confluxes, MPPT control unit and metal-oxide-semiconductor driver element
The supply voltage confluxed needed for communication unit, described MPPT control unit, the work of described metal-oxide-semiconductor driver element described in described Auxiliary Power Units can convert described input voltage Vij to, wherein the value of j is j=1 ..., n,
The described communication unit that confluxes can export the output total current information vc of described power main loop according to the detection signal of the output current io1 to ion of described channel circuit 1 to channel circuit n,
Described MPPT control unit can export described N-MOS according to the detection signal of the current i Lj of the inductance L j in described channel circuit j and described input voltage Vij and be responsible for the control signal vgpj of Mj and the control signal vapj of described N-MOS auxiliary tube Maj, wherein the value of j is j=1,, n
Described metal-oxide-semiconductor driver element can convert the described N-MOS supervisor control signal vgpj of Mj and the control signal vapj of described N-MOS auxiliary tube Maj to has port vgj, the port vsj of the multi channel currents controller of MPPT function and the differential driving signal of port vgaj output by described, wherein the value of j is j=1,, n.
3. the photovoltaic array MPPT interface circuit containing three winding coupling inductance as claimed in claim 2, it is characterized in that: described in there is the MPPT control unit of the multi channel currents controller of MPPT function by sampling holder 1j, 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, wherein the value of j is j=1, n, 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 the input of an input of described multiplier j and 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 input of the positive input terminal of described subtracter 1j and 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 that described N-MOS is responsible for 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.
4. the photovoltaic array MPPT interface circuit containing three winding 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 be made up of summing circuit, the input vj of described summing circuit is 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, wherein the value of j is j=1,, n.
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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 |
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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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| US8872384B2 (en) * | 2010-08-18 | 2014-10-28 | Volterra Semiconductor Corporation | Switching circuits for extracting power from an electric power source and associated methods |
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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 |
| 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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Effective date of registration: 20190920 Address after: 315040 Zhejiang Province, Ningbo high tech Zone Jinghua Road No. 168 Patentee after: Ningbo Ningbian Power Sci-Tech Co., Ltd. Address before: 310014 Hangzhou city in the lower reaches of the city of Zhejiang Wang Road, No. 18 Patentee before: Zhejiang University of Technology |