CN112994211A - High-efficiency space power energy transmission system - Google Patents

Abstract

The present invention provides a high-efficiency space power transfer system, comprising: a solar wing, which includes N solar cell arrays Sa ₁ to Sa _N for supplying power to the DC MPP bus, wherein Sa ₁ continues to supply power to the DC MPP bus; S ³ MPR regulator, including: MPPT controller and shunt regulator, MPPT controller includes MPPT operator and MEA controller, MPPT operator generates DC MPP bus voltage according to DC MPP bus voltage U _Sa and current I _Sa of Sa ₁ Referring to U _{mpp_ref} , the MEA controller generates an error amplification signal based on U _{mpp_ref} and U _Sa , the shunt regulator includes a power switch S _i corresponding to _Sai , i∈[1,N], the shunt regulator compares the error amplification signal with the The threshold voltages of all levels of the shunt regulator generate drive signals from S ₁ to S _N to control Sa ₁ to Sa _N to supply power to the DC MPP bus; the wireless energy transmission part wirelessly transmits the power of the DC MPP bus to the DC constant voltage bus ; DC/DC converter, which converts the voltage of the DC constant voltage bus to the working voltage of the battery pack and the load; the battery pack is used to store the electric energy provided by the DC constant voltage bus, or supply power to the load.

Description

High-efficiency space power energy transmission system

Technical Field

The invention relates to the technical field of wireless energy transmission, in particular to a high-efficiency space power supply energy transmission system for near-field energy transmission of a space primary energy platform.

Background

In recent years, with the increase of the loading power and quantity of the spacecraft, the continuous supply of energy sources for the spacecraft is an urgent need. The microwave and laser energy transmission method has the characteristics of long transmission distance, large transmission power and multi-target mobile power supply, and provides a feasible means for energy supply of the spacecraft.

In order to realize continuous, stable and reliable power supply of loads, a traditional energy transmission system architecture adopts a discrete power conversion unit to realize energy transmission among different ports, and the energy transmission system structure has the defects of complex structure, low specific power, large power consumption, high cost and the like, and potential reliability hidden dangers of the energy transmission system are increased along with the increase of the number of power units and control circuits.

The space microwave wireless energy transmission system can transmit microwave energy with certain power in free space, and the microwave energy is efficiently received and controlled at a receiving end through a converter, so that the output bus voltage is stabilized in a certain range and is directly or indirectly supplied to a spacecraft for loading.

Because the satellite is influenced by the ambient temperature and the illumination intensity in the flight process in space, the working voltage and the working current of the maximum power point of the solar cell array can be greatly changed, so that the maximum output of the output power of the solar cell sailboard becomes a vital means in order to improve the utilization efficiency of energy.

The Maximum Power Point Tracking (Maximum Power Tracking MPPT) method is to introduce a switching regulator between a solar cell array and a storage battery or a load to regulate the output Power of the solar cell array. When the spacecraft needs the maximum power, the maximum power point of the solar cell array can be tracked at any time, and all the power which can be output by the solar cell array can be exerted.

Therefore, it is an urgent problem to provide a wireless energy transmission system of a space power supply, which can be used for a near-field power transmission platform and can fully utilize the electric energy of a solar cell array.

Disclosure of Invention

The invention provides a high-efficiency space power energy transfer system, which passes through S³The MPR (sequential switching shunt maximum power regulator) regulator controls the number of solar cell arrays for transmitting electric energy to the direct current MPP bus according to the magnitude of load required power and tracks the maximum output power of the solar cell arrays, so that the solar cell arrays connected with the direct current MPP bus in the solar wing work in an MPPT (maximum power output) mode; secondly, transmitting the electric energy of the direct current MPP bus to a constant voltage bus by a near field wireless energy transmission method; and finally, charging the storage battery pack through a DC/DC converter or jointly supplying power to a load system. The invention can ensure the stable power utilization of the load, greatly improve the utilization rate of solar wing energy, save the area of the solar wing, reduce the volume and the weight of a satellite energy system, and has great economic benefit and scientific value.

To achieve the above object, the present invention provides a high performance space power system, comprising:

a solar wing including N solar cell arrays Sa₁～Sa_N(ii) a The output end of the solar cell array is connected with the direct current MPP bus and supplies power to the direct current MPP bus;

S³an MPR regulator comprising an MPPT controller and a shunt regulator; the MPPT controller comprises an MPPT arithmetic unit and an MEA controller;

the MPPT arithmetic unit is based on direct current MPP bus voltage U_SaSolar cell array Sa₁Current of (I)_SaAnd calculating to generate direct current MPP bus voltage reference U_{mpp_ref}(i.e., the maximum power point voltage of the solar cell array desired to be obtained); the MEA controller is used for amplifying DC MPP bus voltage reference U_{mpp_ref}Generating an error amplification signal according to the difference value of the DC MPP bus voltage and the DC MPP bus voltage;

the shunt regulator comprises a connection device arranged on the solar cell array Sa_iPower switch tube S between DC MPP bus_i，i∈[1,N](ii) a The shunt regulator generates a power switch tube S by comparing the error amplification signal with threshold voltages of each stage of the shunt regulator_iAccording to the driving signal, the power switch tube S is controlled_iOpen/close to realize control of solar cell array Sa₁～Sa_NSupplying power to a direct current MPP bus or shunting to the ground;

the wireless energy transmission part is used for transmitting the electric energy of the direct current MPP bus to the direct current constant voltage bus through a wireless energy transmission method;

the DC/DC converter and the storage battery pack are connected, wherein the input end of the DC/DC converter is connected with a direct current constant voltage bus, and the output end of the DC/DC converter is connected with the first end of the storage battery pack and the first end of the load through a direct current non-regulating bus; the second end of the storage battery pack and the second end of the load are grounded; converting the voltage of the direct current constant voltage bus into direct current voltage for working of a storage battery and a load through a DC/DC converter; the storage battery pack stores electric energy provided by the direct current constant voltage bus or supplies power to a load.

Preferably, the power switch tube S_iIs an N-channel power switch tube; the shunt regulator further comprises:

n diodes Ds₁～Ds_N(ii) a Wherein the diode Ds_iAnode of the solar cell array Sa_iOutput terminal of diode Ds_iThe cathode of the direct current MPP bus is connected with i belongs to [1, N ]]；

Power switch tube S_iIs connected with the solar cell array Sa_iOutput terminal of (1), diode Ds_iThe anode of (a) is provided,power switch tube S_iThe source of (2) is grounded; controlling a switching tube S by the driving signal_iOpen/close; i is an element of [1, N ∈]；

Filter capacitor C₁Filter capacitor C₁Anode of (D) is connected to the diode Ds_iCathode of (2), filter capacitor C₁The negative electrode of (2) is grounded.

Preferably, the high-efficiency space power energy transfer system further includes a diode D; the anode of the diode D is connected with the filter capacitor C₁Positive electrode of (D), diode (Ds)_iThe cathode of the diode D is connected with the wireless energy transfer part through a direct current MPP bus.

Preferably, the wireless energy transfer part comprises:

the resonant network comprises a main side and an auxiliary side, wherein the main side and the auxiliary side respectively comprise a first end and a second end;

an inverter including a first arm, a second arm, and a capacitor C_in1(ii) a The first bridge arm and the second bridge arm respectively comprise a first end, a second end and a midpoint; first end of first bridge arm, first end of second bridge arm and C_in1Is connected with the cathode of the diode D; a second end of the first bridge arm, a second end of the second bridge arm and C_in1The second terminal of (1) is grounded; the midpoint of the first bridge arm is connected with the first end of the main side of the resonant network; the midpoint of the second bridge arm is connected with the second end of the main side of the resonant network;

the first bridge arm comprises an N-type field effect transistor Q₁、Q₂The second bridge arm comprises an N-type field effect transistor Q₃、Q₄；C_in1Positive electrode of (2), Q₁Drain electrode, Q₂The drain electrode of the diode D is connected with the cathode of the diode D through a direct current MPP bus; c_in1Negative electrode of (1), Q₃Source electrode, Q₄The source of (2) is grounded; q₁Source electrode, Q₃Is connected to a first terminal of the main side of the resonant network, Q₂Source electrode, Q₄Is connected with the second end of the main side of the resonance network;

a rectifier including four power diodes D₁～D₄Capacitor C_o1；D₁Cathode of (D)₂Cathode and capacitor C_o1Is turning toThe pole is connected with the input end of the DC/DC converter through a direct current constant voltage bus; d₃Anode of (D)₄Anode and capacitor C_o1The negative electrode of (2) is grounded; d₁Anode of (D)₃Is connected to the first end of the secondary side of the resonant network, D₂Anode of (D)₄Is connected to the second end of the secondary side of the resonant network.

Preferably, the topological structure of the resonant network is any one of S-S, LCC-S, LCC-LCC and LCL-LCL type topological structures.

Preferably, the DC/DC converter includes: capacitor C_in2、C_o2N-type field effect transistor Q₅、Q₆Diode D₅、D₆An inductance L;

C_in2positive electrode of (2), Q₅The drain electrode of the grid electrode is connected with a direct current constant voltage bus; q₅Source electrode of D₅A cathode of (a), a first end of an inductor (L); the second end of the inductor L is connected with the inductor D₆Anode, Q₆Drain electrode of, D₆Cathode, C_o2The positive electrode of the load is connected with the first end of the load through a direct current unregulated bus; c_in2Negative electrode of (D)₅Anode, Q₆Source electrode, C_o2The negative electrode of (2) is grounded.

Compared with the prior art, the invention has the beneficial effects that:

1) the invention can be suitable for the working condition of the satellite in the space environment. Under the scenes of illumination periods and shadow periods of different tracks, S is adopted³The MPR (sequential switching shunt maximum power regulator) regulator enables a solar cell array connected with a direct current MPP bus in a solar wing to work in an MPPT (maximum power output) mode, the direct current MPP bus transmits energy to a direct current constant voltage bus through a wireless energy transmission part, the direct current constant voltage bus outputs a direct current non-regulating bus through a DC/DC converter, and the direct current non-regulating bus transmits electric energy to a storage battery pack and a load. When the energy of the direct current unadjusted bus is more than the energy required by the rear-end load (namely when the energy is sufficient), the electric energy is transmitted to the rear-end load to meet the requirement of the rear-end load, and the redundant energy is used for charging the storage battery pack; when the energy of the direct current non-regulated bus is insufficient, the direct current non-regulated bus and the stored electricityThe battery packs collectively deliver electrical energy to the load to meet its energy demand. The invention can ensure the stable power utilization of the load, greatly improve the utilization rate of solar wing energy, save the area of the solar wing, reduce the volume and the weight of a satellite energy system and have great economic benefit and scientific value.

2) The invention also adjusts the electric energy transmitted to the load through the storage battery, plays a role of 'leveling peak and filling valley' for the current output by the direct current constant voltage bus, and effectively ensures the stable power utilization of the load.

3) The invention can realize the control of the equivalent amplitude of the output voltage of the inverter by controlling the phase difference between the first bridge arm and the second bridge arm of the inverter, thereby controlling the voltage output by the secondary side of the resonant network to be stabilized in a certain range and further ensuring the stability of the load power utilization.

4) The high-efficiency space power energy transmission system of the invention is based on S³Topological characteristics of MPR system can be controlled by controlling a solar cell array (Sa)₁) The maximum power output of the solar wing can be realized simultaneously by the maximum power output of the solar wing.

5) The invention can be widely applied to energy platforms with near-field electric energy transmission requirements, has better expansibility and is not limited by the power grade and voltage of a direct-current constant-voltage bus.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, and it is obvious that the drawings in the following description are an embodiment of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts according to the drawings:

FIG. 1 is a schematic diagram of a high performance spatial power system architecture according to the present invention;

FIG. 2 shows a solar cell array and the S used in the energy transmission system of the present invention³A topology map of the MPR regulator;

FIG. 3 is a schematic diagram of a wireless energy transfer part employed in an embodiment of the present invention;

FIG. 4 is a schematic circuit diagram of a DC/DC converter employed in the present invention;

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a high-efficiency space power energy transfer system, which comprises: solar wing, S³MPR regulator, wireless energy transfer part, DC/DC converter, storage battery, load, diode D.

As shown in fig. 1, the solar wing includes N solar cell arrays, each solar cell array Sa₁～Sa_N(ii) a The solar cell array is connected with a direct current MPP bus through a diode D.

As shown in fig. 1 and 2, S is³The MPR regulator comprises an MPPT controller and a shunt regulator.

The MPPT controller comprises an MPPT arithmetic unit and an MEA controller: the MPPT arithmetic unit is based on direct current MPP bus voltage U_SaSolar cell array Sa₁Current of (I)_SaAnd calculating to generate direct current MPP bus voltage reference U_{mpp_ref}(ii) a The MEA controller is used for amplifying DC MPP bus voltage reference U_{mpp_ref}And generating an error amplification signal according to the difference value of the DC MPP bus voltage and the DC MPP bus voltage.

As shown in fig. 1 and 2, the shunt regulator is connected between the output end of the solar cell array and the dc MPP bus, and includes a dc MPP bus connected to the solar cell array Sa_iCorresponding power switch tube S_iN diodes Ds₁～Ds_NFilter capacitor C₁Where i ∈ [1, N ]]。

As shown in fig. 2, a diode Ds_iAnode of the solar cell array Sa_iOutput terminal of diode Ds_iThe cathode of the direct current MPP bus is connected with i belongs to [1, N ]]。

In the embodiment of the invention, the power switch tube S₁～S_NAre all N-type field effect transistors. Power switch tube S_iIs connected with the solar cell array Sa_iOutput terminal of (1), diode Ds_iAnode of (2), power switch tube S_iIs grounded. Power switch tube S₁Is a normally closed switch. The shunt regulator generates a power switch tube S by comparing the error amplification signal with threshold voltages of each stage of the shunt regulator_iAccording to the driving signal, the power switch tube S is controlled_iOpen/close to realize control of solar cell array Sa₁～Sa_NAnd supplying power to the direct current MPP bus or shunting to the ground. With respect to S₁～S_NHow to turn on and off according to the driving signal of the MEA controller is a prior art (i.e., a conventional shunt circuit control technology), and will not be described in detail here. Wherein i ∈ [1, N ]]。

Filter capacitor C₁Anode of (D) is connected to the diode Ds_iCathode of (2), filter capacitor C₁The negative electrode of (2) is grounded.

The anode of the diode D is connected with the output end of the solar cell array and the switching tube S_iAnd the drain electrode and the cathode of the diode D are connected with the wireless energy transfer part through a direct current MPP bus.

As shown in fig. 1, the wireless energy transfer part includes: inverter, resonant network, rectifier. The wireless energy transfer part is used for transferring electric energy of the direct current MPP bus to an inverter, transferring the energy to a rectifier on the secondary side of a resonance network in a wireless mode through the resonance network after DC/AC inversion, and outputting the energy to the direct current constant voltage bus after AC/DC rectification.

The resonant network comprises a primary side and a secondary side, each of which comprises a first end and a second end. The topological structure of the resonant network is any one of S-S, LCC-S, LCC-LCC and LCL-LCL type topologies. A resonant network of the S-S type employed in an embodiment of the present invention is shown in fig. 3. As shown in FIG. 3, in the embodiment of the present invention, the main side of the resonant network includes an inductor L_zCapacitor C_z，C_zHaving a first end connected to the main side of the resonant networkFirst end, C_zIs connected to L_zFirst end of, L_zIs connected to the second end of the main side of the resonant network; the secondary side of the resonant network comprises an inductance L_fCapacitor C_f，C_fIs connected to a first terminal of a secondary side of the resonant network, C_fIs connected to L_fFirst end of, L_fIs connected to the second end of the secondary side of the resonant network.

As shown in fig. 3, the inverter includes a first bridge arm, a second bridge arm, and an input filter capacitor C_in1(ii) a The first bridge arm and the second bridge arm respectively comprise a first end, a second end and a midpoint; first end of first bridge arm, first end of second bridge arm and C_in1The anode of the diode D is connected with the cathode of the diode D; a second end of the first bridge arm, a second end of the second bridge arm and C_in1The negative electrode of (2) is grounded; the midpoint of the first bridge arm is connected with the first end of the main side of the resonant network; the midpoint of the second bridge arm is connected with the second end of the main side of the resonant network; sampling the voltage value of a constant voltage bus output by the rectifier through a wireless communication mode (such as wifi/Bluetooth) to control the phase difference between a first bridge arm and a second bridge arm of the inverter so as to control the equivalent amplitude of the output voltage of the inverter; when the input voltage of the inverter changes, the phase difference between the first bridge arm and the second bridge arm of the inverter is controlled to control the equivalent amplitude of the output voltage of the inverter. And further, the voltage output by the secondary rectifier of the resonant network is stabilized in a certain range, and the output of a direct-current constant-voltage bus is realized.

As shown in FIG. 3, the first leg comprises an NFET Q₁、Q₂The second bridge arm comprises an N-type field effect transistor Q₃、Q₄；C_in1Positive electrode of (2), Q₁Drain electrode, Q₂The drain electrode of the diode D is connected with the cathode of the diode D through a direct current MPP bus; c_in1Negative electrode of (1), Q₃Source electrode, Q₄The source of (2) is grounded; q₁Source electrode, Q₃Is connected to a first terminal of the main side of the resonant network, Q₂Source electrode, Q₄Is connected with the second end of the main side of the resonance network;

as shown in fig. 3, the rectifier includes four power diodes D₁～D₄Capacitor C_o1；D₁Cathode of (D)₂Cathode and capacitor C_o1The anode of the DC/DC converter is connected with the input end of the DC/DC converter through a direct current constant voltage bus; d₃Anode of (D)₄Anode and capacitor C_o1The negative electrode of (2) is grounded; d₁Anode of (D)₃Is connected to the first end of the secondary side of the resonant network, D₂Anode of (D)₄Is connected to the second end of the secondary side of the resonant network.

The DC/DC converter is used for converting the voltage of the direct current constant voltage bus into direct current voltage for load operation. As shown in fig. 1, the input terminal of the DC/DC converter is connected to a DC constant voltage bus, and the output terminal of the DC/DC converter is connected to a load and a battery pack through a DC unregulated bus. In the embodiment of the invention, the DC/DC converter adopts the step-up and step-down voltage regulator, and power regulation can be carried out through the DC/DC converter aiming at direct current constant voltage buses with different voltage grades. The application voltage range is wide, the structure is simple, and the expansibility is strong.

As shown in fig. 4, the DC/DC converter includes: capacitor C_in2、C_o2N-type field effect transistor Q₅、Q₆Diode D₅、D₆An inductance L;

C_in2positive electrode of (2), Q₅The drain electrode of the grid electrode is connected with a direct current constant voltage bus; q₅Source electrode of D₅A cathode of (a), a first end of an inductor (L); the second end of the inductor L is connected with the inductor D₆Anode, Q₆Drain electrode of, D₆Cathode, C_o2The positive electrode of the load is connected with the first end of the load through a direct current unregulated bus; c_in2Negative electrode of (D)₅Anode, Q₆Source electrode, C_o2The negative electrode of (2) is grounded.

As shown in fig. 1, the storage battery pack is connected with the output end of the DC/DC converter (i.e. connected with a DC unregulated bus); when the energy of the direct current unadjusted bus is more than the energy required by the rear-end load (namely when the energy is sufficient), the electric energy is transmitted to the rear-end load to meet the requirement of the rear-end load, and the redundant energy is used for charging the storage battery pack; when the energy of the direct current non-regulation bus is insufficient, the direct current non-regulation bus and the storage battery pack jointly transmit electric energy to the load to meet the energy requirement of the load.

The space power supply energy transfer system is suitable for a satellite power supply platform. By S of the invention³MPR controller, when the system is in stable state, the reference voltage used by MEA controller is the maximum power point voltage reference U of solar battery array output by MPPT arithmetic unit_{mpp_ref}. The energy transfer system is applied to a topological structure without adjusting the bus, has the dynamic characteristic of fully adjusting the bus, and can track the maximum power output of the solar cell array.

The high-efficiency space power energy transmission system of the invention is based on S³The topological characteristic of the MPR regulator controls the maximum power output of one solar cell array to simultaneously realize the maximum power output of a plurality of solar cell arrays.

The specific working state of the energy transfer system of the invention under different scenes is given below.

Scene 1: the energy transfer system is in the illumination period and the energy (including loss) required by the load is less than the maximum power output energy of a single solar cell array.

The energy surplus output by the solar wing is maximum at this time. S³MPR controller is in S similar to the conventional one³R state, at the time, the MEA and the solar cell array Sa are amplified according to the error generated by the MEA controller₁～Sa_NAre all in a shunt regulation state (which is the traditional S)³R control techniques, which are not described in detail herein). The shunting regulation state means that part of electric energy generated by the solar cell array is transmitted to the direct current MPP bus, and the rest is shunted to the ground. Switch tube S₂～S_NAll-on, solar cell array S₂～S_NThe current of (2) is totally shunted to the ground, at the moment, the direct current MPP bus is non-maximum power point voltage, and the direct current MPP bus voltage changes along with the power conversion of load requirements.

Scene 2: the energy transmission system is in an illumination period, and the energy required by the load is larger than the maximum power output energy of a single solar cell array of the solar wing.

At this time, the energy output from the solar wings remains excessive. S³The MPR controller is in the MPPT regulation state,namely, the reference voltage of the MEA controller is the maximum power point voltage U output by the MPPT controller_{mpp_ref}. At the moment, according to the comparison between the error amplification signal generated by the MEA controller and the threshold voltage of each stage of the shunt regulator, the driving signal corresponding to the power switch tube is generated, and the partial solar cell array (including Sa) of the solar wing₁) And in the maximum power output state, one solar cell array is in a shunt regulation state, and the other solar cell arrays are shunted to the ground. The voltage of the direct current MPP bus is the maximum power point voltage of the solar wing.

Scene 3: the energy transmission system is in the illumination period and the energy required by the load is equal to the sum of the maximum power output energy of all solar cell arrays of the solar wing.

At this time, S³The MPR controller is in an MPPT regulation state, and all solar cell arrays of the solar wing are in a maximum power output state. The direct current MPP bus is the maximum power point voltage of the solar wing. All energy is just consumed by the storage battery and the load after being transmitted by the wireless energy transmission part.

Scene 4: the energy transmission system is in an illumination period, and the energy required by the load is greater than the sum of the maximum power output energy of all solar cell arrays of the solar wing.

At this time, all solar cell arrays of the solar wing are in a maximum power output state. The direct current MPP bus is the maximum power point voltage of the solar wing. Aiming at the mode, the energy transfer system has three working states:

the first state: the energy required by the load is larger than the maximum power output energy of all solar cell arrays of the solar wing. After the electric energy is transmitted by the wireless energy transmission part, the solar wing is in a combined power supply mode, and the energy released by the storage battery and the solar wing is combined to supply power to the load.

And a second state: the energy required by the load is equal to the maximum power output energy of all solar cell arrays of the solar wing. After the electric energy is transmitted by the wireless energy transmission part, the solar wing is in a single power supply mode, the load is supplied with power only by the energy released by the solar wing, and the storage battery does not discharge.

And a third state: the energy required by the load is less than the maximum power output energy of all solar cell arrays of the solar wing. After the wireless energy transmission, the solar wing is in a single power supply mode, the load is powered by the energy released by the solar wing, and the storage battery is in a charging state.

Scene 5: the energy transfer system is in the shadow period.

The solar wing has no energy output. At this time, the battery is in a discharged state, and the load is supplied with power from the battery.

While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (6)

1. A high performance space power delivery system, comprising:

a solar wing including N solar cell arrays Sa₁～Sa_N(ii) a The output end of the solar cell array is connected with the direct current MPP bus and supplies power to the direct current MPP bus;

S³an MPR regulator comprising an MPPT controller and a shunt regulator; the MPPT controller comprises an MPPT arithmetic unit and an MEA controller;

the MPPT arithmetic unit is based on direct current MPP bus voltage U_SaSolar cell array Sa₁Current of (I)_SaAnd calculating to generate direct current MPP bus voltage reference U_{mpp_ref}(ii) a The MEA controller is used for amplifying DC MPP bus voltage reference U_{mpp_ref}Generating an error amplification signal according to the difference value of the DC MPP bus voltage and the DC MPP bus voltage;

the shunt regulator comprises a connection device arranged on the solar cell array Sa_iPower switch tube S between DC MPP bus_i，i∈[1,N](ii) a The shunt regulator generates a power switch tube S by comparing the error amplification signal with threshold voltages of each stage of the shunt regulator_iAccording to the driving signal, the power switch tube S is controlled_iOpen/close to realize control of solar cell array Sa₁～Sa_NSupplying power to a direct current MPP bus or shunting to the ground;

the wireless energy transmission part is used for transmitting the electric energy of the direct current MPP bus to the direct current constant voltage bus through a wireless energy transmission method;

the DC/DC converter and the storage battery pack are connected, wherein the input end of the DC/DC converter is connected with a direct current constant voltage bus, and the output end of the DC/DC converter is connected with the first end of the storage battery pack and the first end of the load through a direct current non-regulating bus; the second end of the storage battery pack and the second end of the load are grounded; converting the voltage of the direct current constant voltage bus into direct current voltage for working of a storage battery and a load through a DC/DC converter; the storage battery pack stores electric energy provided by the direct current constant voltage bus or supplies power to a load.

2. The energy efficient space power delivery system of claim 1 wherein said power switch S_iIs an N-channel power switch tube; the shunt regulator further comprises:

n diodes Ds₁～Ds_N(ii) a Wherein the diode Ds_iAnode of the solar cell array Sa_iOutput terminal of diode Ds_iThe cathode of the direct current MPP bus is connected with i belongs to [1, N ]]；

Power switch tube S_iIs connected with the solar cell array Sa_iOutput terminal of (1), diode Ds_iAnode of (2), power switch tube S_iThe source of (2) is grounded; controlling a switching tube S by the driving signal_iOpen/close; i is an element of [1, N ∈]；

Filter capacitor C₁Filter capacitor C₁Anode of (D) is connected to the diode Ds_iCathode of (2), filter capacitor C₁The negative electrode of (2) is grounded.

3. The high performance spatial power energy delivery system of claim 2, further comprising a diode D; the anode of the diode D is connected with the filter capacitor C₁Positive electrode of (D), diode (Ds)_iThe cathode of the diode D is connected with the wireless energy transfer part through a direct current MPP bus.

4. The energy efficient spatial power delivery system of claim 3, wherein said wireless energy delivery portion comprises:

the resonant network comprises a main side and an auxiliary side, wherein the main side and the auxiliary side respectively comprise a first end and a second end;

an inverter including an N-type field effect transistor Q₁～Q₄Input filter capacitor C_in1；C_in1Positive electrode of (2), Q₁Drain electrode, Q₂The drain electrode of the diode D is connected with the cathode of the diode D through a direct current MPP bus; c_in1Negative electrode of (1), Q₃Source electrode, Q₄The source of (2) is grounded; q₁Source electrode, Q₃Is connected to a first terminal of the main side of the resonant network, Q₂Source electrode, Q₄Is connected with the second end of the main side of the resonance network;

a rectifier including four power diodes D₁～D₄Capacitor C_o1；D₁Cathode of (D)₂Cathode and capacitor C_o1The anode of the DC/DC converter is connected with the input end of the DC/DC converter through a direct current constant voltage bus; d₃Anode of (D)₄Anode and capacitor C_o1The negative electrode of (2) is grounded; d₁Anode of (D)₃Is connected to the first end of the secondary side of the resonant network, D₂Anode of (D)₄Is connected to the second end of the secondary side of the resonant network.

5. The energy efficient spatial power delivery system of claim 4, wherein said resonant network topology is any one of LCC-S, LCC-LCC, LCL-LCL, S-S topology.

6. The energy efficient spatial power delivery system of claim 1, wherein said DC/DC converter comprises: capacitor C_in2、C_o2N-type field effect transistor Q₅、Q₆Diode D₅、D₆An inductance L;

C_in2positive electrode of (2), Q₅The drain electrode of the grid electrode is connected with a direct current constant voltage bus; q₅Source electrode of D₅A cathode of (a), a first end of an inductor (L); the second end of the inductor L is connected with the inductor D₆Anode, Q₆Drain electrode of, D₆Cathode, C_o2The positive electrode of the load is connected with the first end of the load through a direct current unregulated bus; c_in2Negative electrode of (D)₅Anode, Q₆Source electrode, C_o2The negative electrode of (2) is grounded.

Images