CN111555470A - Photovoltaic power generation wireless energy transmission system and matched transmission method - Google Patents

Abstract

The invention relates to the field of photovoltaic power generation wireless energy transmission equipment, in particular to a photovoltaic power generation wireless energy transmission system and a matched transmission method. The photovoltaic power generation wireless energy transmission and conversion device aims at solving the problem that photovoltaic power generation wireless energy transmission and conversion efficiency is low in the prior art. The photovoltaic power generation device sequentially comprises a photovoltaic side circuit, a wireless energy transmission transmitting circuit and a wireless energy transmission receiving circuit along an energy transmission direction; the photovoltaic side circuit comprises a photovoltaic component and a synchronous boosting DC-DC converter component, and the infinite energy transmission transmitting circuit comprises a full-bridge inverter circuit component and the front half part of an LCC-S resonance compensation mechanism; the infinite energy transmission receiving circuit comprises a rear half part of the LCC-S resonance compensation component, a diode rectifying circuit component, a synchronous buck DC-DC converter component and a power load. Has the advantages that: the conduction loss of the follow current tube is greatly reduced, and therefore higher energy conversion efficiency is obtained.

Description

Photovoltaic power generation wireless energy transmission system and supporting transmission method

technical field

The invention relates to the field of wireless energy transmission system equipment, in particular to a photovoltaic power generation wireless energy transmission system and a matching transmission method.

Background technique

Today, the development of large-scale photovoltaic power generation in China has the characteristics of diversification. In order to promote the implementation of the innovation-driven development strategy and promote the harmonious coexistence of man and nature, my country vigorously supports the development of the photovoltaic industry, and has launched "Photovoltaic +", distributed power generation, and photovoltaic poverty alleviation. , Photovoltaic leader project, to promote the progress of photovoltaic power generation technology, industrial upgrading and cost reduction. The application of photovoltaic power generation is as large as photovoltaic grid connection, and it can be seen in ordinary electronic equipment.

Wireless energy transmission technology is a popular technology that can be seen everywhere in life and has a wide range of applications. Its characteristics are that the energy transmission adopts a non-contact method, so the wear rate of the equipment is low, the area of the charging area is relatively small, and some line connections are saved, making the charging equipment easier to maintain.

With the development of new energy technology and the application of wireless energy transmission technology in various industries, the combination of photovoltaic power generation and wireless energy transmission has gradually attracted people's attention. The topology of the system and its control strategy affect the efficiency and stability of the system. Therefore, the energy conversion structure and its control algorithm and implementation are particularly important.

Among the disclosed patent technologies, the patented technology with the application number of 201711037142.5 entitled Wireless Energy Transmission and Reception Circuit and Wireless Energy Transmission System Using the Circuit, the disclosed wireless energy transmission and reception circuit uses a full-wave rectifier and a voltage doubler A reconfigurable rectifier with two working modes of the rectifier, a pre-rectification regulator capable of adjusting the output size of the induced voltage, and a control unit widen the load adjustment range and improve the wireless energy receiving efficiency. However, the applicant has found in the work in the field for many years that the adjustment of this technology is extremely inconvenient and the energy conversion is not stable enough.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to solve the problem of improving the energy conversion efficiency and stable operation of the existing photovoltaic power generation wireless energy transmission system, and to provide a synchronous DC-DC converter with higher conversion efficiency and better control effect, LCC resonance topology and MPPT control method based on Lyapunov inverse control.

The specific scheme of the present invention is:

Design a photovoltaic power generation wireless energy transmission system,

The energy transmission direction includes a photovoltaic side circuit, a wireless energy transmission transmitting circuit, and a wireless energy transmission receiving circuit in sequence; wherein, the photovoltaic side circuit includes a photovoltaic component and a synchronous boost DC-DC converter component; the infinite energy transmission transmitting circuit includes The full-bridge inverter circuit assembly and the first half of the LCC-S resonance compensation mechanism; the infinite energy transmission and reception circuit includes the second half of the LCC-S resonance compensation assembly, a diode rectifier circuit assembly, and a synchronous step-down DC-DC converter assembly and electrical load, the synchronous boost DC-DC converter assembly includes a first capacitor C ₁ , one side of the first capacitor C ₁ is connected to the first inductor L ₁ and the other side of the first capacitor C ₁ The other ends of the first NMOS transistor VT ₁ , the second NMOS transistor VT ₂ , the first NMOS transistor VT ₁ , and the second NMOS transistor VT ₂ are connected in parallel with the other ends of the second capacitor C ₂ to form a synchronous boost DC-DC conversion device components.

In a specific implementation, the full-bridge inverter circuit assembly includes a bridge-connected third NMOS transistor VT ₃ , a fourth NMOS transistor VT ₄ , a fifth NMOS transistor VT ₅ , and a sixth NMOS transistor VT ₆ .

In a specific implementation, the first half of the LCC-S resonant compensation component is the transmitting end. At the transmitting end, the second inductor L ₂ is connected in series with the third capacitor C ₃ , and the fourth capacitor C ₄ is connected in series with the third inductor L ₃ . The _third capacitor C3 is connected in parallel, the second half of the LCC-S resonance compensation component includes the output side of the LCC-S resonance compensation structure, and the output side of the LCC-S resonance compensation structure includes the _fourth inductor L4 and the fifth capacitor _C5 , The _fourth inductor L4 is connected in series with the _fifth capacitor C5, the _fourth inductor L4 is installed corresponding to the _third inductor L3, the output side of the LCC-S resonance compensation structure is connected in parallel with the diode uncontrolled rectifier circuit, and the diode uncontrolled rectifier circuit is connected in parallel. The circuit includes a bridge-connected first diode VD ₁ , a second diode VD ₂ , a third diode VD ₃ , a fourth diode VD ₄ , a sixth capacitor C ₆ in parallel with the diodes that do not control the output of the rectifier circuit, After being output by the sixth capacitor _C6 , a synchronous step-down DC-DC converter assembly is connected in parallel, and the synchronous step-down DC-DC converter includes a _seventh NMOS transistor VT7, an _eighth NMOS transistor VT8, a _fifth inductor L5 and The seventh capacitor C ₇ is connected to the output side of the synchronous step-down DC-DC converter in parallel with the electrical load.

In the specific implementation, it also includes a microcontroller, and the synchronous boost DC-DC converter component and the synchronous buck DC-DC converter component are both provided with a voltage/current signal acquisition element, and the voltage/current signal acquisition element outputs a The signal is connected to the microcontroller, and the output end of the microcontroller is connected to a control switch to control the first NMOS transistor VT ₁ , the second NMOS transistor VT ₂ , the seventh NMOS transistor VT ₇ , and the eighth NMOS transistor VT ₈ duty cycle operating state.

In a specific implementation, the seventh NMOS transistor VT ₇ and the eighth NMOS transistor VT ₈ of the synchronous boost DC-DC converter assembly work in an MPPT control mode based on Lyapunov inversion control.

In the specific implementation, the power electronic switching devices in the synchronous step-up DC-DC converter assembly and the synchronous step-down DC-DC converter assembly are replaced with fully-controlled devices, and the fully-controlled devices include NMOS, or N-type IGBT fully-controlled devices. .

A photovoltaic power generation wireless energy transmission method, using the above photovoltaic power generation wireless energy transmission system, includes the following steps:

(1) Photovoltaic module power generation: Photovoltaic modules collect energy, and the energy is transmitted to the wireless energy transmission transmitter circuit, and boosted by synchronous rectification technology to form direct current a;

(2) Wireless energy transmission: the direct current a is converted into alternating current through a full-bridge inverter circuit to form an alternating current b, and the alternating current b forms an alternating current c through the LCC-S resonance compensation mechanism;

(3) Wireless energy reception: after the alternating current c is converted to direct current d through a diode uncontrolled rectification circuit, the voltage is reduced through synchronous rectification technology, and the direct current e is connected to the electrical load;

Among them, the synchronous rectification technology is adopted, based on Lyapunov maximum power point tracking mode or constant voltage/constant current control mode; the selection of the mode is through the following steps, setting the wireless energy power output threshold W _E , synchronous step-down DC-DC converter components The output power value W _o is compared in real time in the microcontroller. If W _o > W _E , the first NMOS transistor VT ₁ and the second NMOS transistor VT ₂ of the synchronous boost DC-DC converter assembly are controlled to be fixed The duty cycle works, the seventh NMOS transistor VT ₇ and the eighth NMOS transistor VT ₈ in the synchronous step-down DC-DC converter assembly work in constant voltage/constant current mode, if W _o <W _E , control the The seventh NMOS transistor VT ₇ and the eighth NMOS transistor VT ₈ in the synchronous step-down DC-DC converter assembly work with a fixed duty cycle, and the first NMOS transistor VT ₁ in the synchronous step-up DC-DC converter assembly . The second NMOS transistor VT ₂ works in the MPPT control mode based on Lyapunov inversion control.

In the specific implementation, in the Lyapunov-based maximum power point tracking mode, the duty cycle control formula is:

D为DC-DC升压变换器占空比，u_dc为同步升压DC-DC 变换器组件两侧输出电压,u_pv为第一电容两侧电压，i_pv为光伏组件输出电流，e₁,e₂为误差系数，常数k₁,k₂>0。

D is the duty ratio of the DC-DC boost converter, u _dc is the output voltage on both sides of the synchronous boost DC-DC converter module, u _pv is the voltage on both sides of the first capacitor, i _pv is the output current of the photovoltaic module, e ₁ , e ₂ is the error coefficient, the constants k ₁ , k ₂ >0.

In the specific implementation, in the constant voltage/constant current control mode, when working in the constant voltage mode, the expected voltage on both sides of the seventh capacitor C7 is subtracted from the actual measured voltage, and the expected load side is calculated by the PI controller. The current is subtracted from the actual measured current, and the duty cycle of the synchronous DC-DC step-down converter is calculated by the PI controller. When working in constant current mode, the expected current on the load side is directly given, and then compared with the actual current. The measured currents are subtracted, and the duty cycle of the synchronous step-down DC-DC converter is calculated by the PI controller to achieve constant current charging while limiting the final charging voltage.

为系统在最大功率时第一电容两侧电压， i_L为流过第一电感的电流，i_L ^*为流过第一电感电流的期望值，流过第一电感电流的期望值 i_L ^*＝i_pv+k₁e₁C₁。In specific implementation,

is the voltage on both sides of the first capacitor when the system is at the maximum power, i _L is the current flowing through the first inductor, i _L ^* is the expected value of the current flowing through the first inductor, and the expected value of the current flowing through the first inductor i _L ^* = i _pv +k ₁ e ₁ C ₁ .

The beneficial effects of the present invention are:

Compared with diodes, the on-resistance of MOSFETs is only a few tens of mΩ, so the conduction loss of the freewheeling tube is greatly reduced in the DC-DC conversion, resulting in higher conversion efficiency. To a certain extent, the complexity of the control is reduced. The LCC resonant topology presents the characteristics of a constant voltage source and has the characteristics of zero input reactive power, which can improve the efficiency. The application of the MPPT control method of Lyapunov inverse control makes the maximum power point tracking more stable. . These technical features and combinations of technical features are not mentioned in the prior art.

In the disclosed patent technology, the main research object is the receiving circuit, which has a simple structure. The hardware circuits such as bandgap reference source and signal generator are mainly used to complete the control of the energy receiving circuit. However, when modifying the control parameters, the hardware circuit needs to be modified. Suitable for general wireless energy receiving systems.

The main research object in this patent application is the transmitting circuit and receiving circuit connecting the photovoltaic modules. In the case of solar power generation, the microcontroller is mainly used to complete the control of the entire circuit. When modifying the control parameters, it only needs to be carried out on the program. Modification, flexible control.

Description of drawings

Figure 1 is a flowchart of a photovoltaic power generation wireless energy transmission system;

Figure 2 is the photovoltaic side and the wireless energy transmission transmitting circuit;

Figure 3 is a wireless energy transmission receiving circuit;

Figure 4 is the maximum power point tracking control;

Figure 5 is constant voltage/constant current control;

Fig. 6 is the power change waveform diagram after adding light disturbance in the high-power point tracking mode;

Figure 7 is the first example of the output voltage and current waveform diagram in the constant voltage/constant current control mode;

Figure 8 is the second example of the output voltage and current waveform diagram in the constant voltage/constant current control mode;

Figure 9 is the third example of the output voltage and current waveform diagram in the constant voltage/constant current control mode;

Figure 10 is the fourth example of the output voltage and current waveforms in the constant voltage/constant current control mode;

FIG. 11 is a schematic diagram of the connection between the microcontroller and the wireless energy transmission system.

Detailed ways

The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, but not to limit the present invention.

Example 1

A photovoltaic power generation wireless energy transmission system and supporting transmission method, see Figures 1 to 10, including a photovoltaic side circuit, a wireless energy transmission transmitting circuit, and a wireless energy transmission receiving circuit in sequence along the energy transmission direction; wherein, the photovoltaic side circuit includes a photovoltaic side circuit. Components, synchronous boost DC-DC converter components; infinite energy transmission transmitting circuit including full-bridge inverter circuit components and the first half of the LCC-S resonance compensation mechanism; infinite energy transmission receiving circuit including the latter half of the LCC-S resonance compensation component part, a diode rectifier circuit assembly, a synchronous step-down DC-DC converter assembly and an electrical load; the synchronous step-up DC-DC converter assembly includes a first capacitor C ₁ , and one side of the first capacitor C ₁ is connected to a first inductor L _1. The other side of the first capacitor C ₁ is connected in parallel with the first NMOS transistor VT ₁ , the second NMOS transistor VT ₂ , the first NMOS transistor VT ₁ , and the other end of the second NMOS transistor VT ₂ is connected to the second capacitor C ₂ . Both ends form a synchronous boost DC-DC converter assembly.

The full-bridge inverter circuit assembly includes a bridged third NMOS transistor VT ₃ , a fourth NMOS transistor VT ₄ , a fifth NMOS transistor VT ₅ , and a sixth NMOS transistor VT ₆ .

The first half of the LCC-S resonance compensation component is the transmitting end. At the transmitting end, the second inductor L ₂ is connected in series with the third capacitor C ₃ , the fourth capacitor C ₄ is connected in series with the third inductor L ₃ and then connected in parallel with the third capacitor C ₃ , the second half of the LCC-S resonance compensation component includes the output side of the LCC-S resonance compensation structure, the output side of the LCC-S resonance compensation structure includes the fourth inductor L ₄ and the fifth capacitor C ₅ , the fourth inductor L ₄ and the fifth The capacitor _C5 is connected in series, the _fourth inductor L4 is installed corresponding to the _third inductor L3, the output side of the LCC-S resonance compensation structure is connected in parallel with the diode uncontrolled rectifier circuit, and the diode uncontrolled rectifier circuit includes a bridged first diode VD _1. The second diode VD ₂ , the third diode VD ₃ , the fourth diode VD ₄ , the sixth capacitor C ₆ in parallel with the diode does not control the output of the rectifier circuit, and the output of the sixth capacitor C ₆ is paralleled and synchronized The step-down DC-DC converter assembly, the synchronous step-down DC-DC converter assembly includes a seventh NMOS transistor VT ₇ , an eighth NMOS transistor VT ₈ , a fifth inductor L ₅ and a seventh capacitor C ₇ , the synchronous step-down DC-DC The output side of the DC converter assembly is connected in parallel with an electrical load.

It also includes a microcontroller, the synchronous boost DC-DC converter component and the step-down DC-DC converter are equipped with a voltage/current signal acquisition element, and the signal output by the voltage/current signal acquisition element is connected to the microcontroller. The output end of the controller is connected to the control switch to control the duty cycle working states of the first NMOS transistor VT ₁ , the second NMOS transistor VT ₂ , the seventh NMOS transistor VT ₇ , and the eighth NMOS transistor VT ₈ .

The seventh NMOS transistor VT ₇ and the eighth NMOS transistor VT ₈ of the synchronous boost DC-DC converter assembly work in the MPPT control mode based on Lyapunov inverse control.

The power electronic switching devices of the synchronous step-up DC-DC converter components and the synchronous step-down DC-DC converter components are replaced by fully-controlled devices, and the fully-controlled devices include NMOS, or N-type IGBT fully-controlled devices.

A photovoltaic power generation wireless energy transmission method, using the above photovoltaic power generation wireless energy transmission system, includes the following steps:

(1) Photovoltaic module power generation: Photovoltaic modules collect energy, transmit the energy to the wireless energy transmission transmitter circuit, and boost the voltage through synchronous rectification technology to form direct current a;

(2) Wireless energy transmission: DC a is converted to AC through a full-bridge inverter circuit to form AC b, and AC b forms AC through the LCC-S resonance compensation mechanism;

(3) Wireless energy reception: After the alternating current c is converted to the direct current d through the diode uncontrolled rectification circuit, the voltage is reduced through the synchronous rectification technology, and the direct current e is formed and then connected to the electric load;

Among them, the synchronous rectification technology is adopted, based on Lyapunov maximum power point tracking mode or constant voltage/constant current control mode; the selection of the mode is through the following steps, setting the wireless energy power output threshold W _E , synchronous step-down DC-DC converter components The output power value W _o is compared in real time in the microcontroller. If W _o > W _E , the first NMOS transistor VT ₁ and the second NMOS transistor VT ₂ of the synchronous boost DC-DC converter assembly are controlled to have a fixed duty than working, the seventh NMOS transistor VT ₇ and the eighth NMOS transistor VT ₈ in the synchronous step-down DC-DC converter assembly work in constant voltage/constant current mode, if W _o <W _E , control the synchronous step-down DC-DC The seventh NMOS transistor VT ₇ and the eighth NMOS transistor VT ₈ in the converter assembly work with a fixed duty cycle, and the first NMOS transistor VT ₁ and the second NMOS transistor VT ₂ in the synchronous boost DC-DC converter assembly operate with a fixed duty cycle. The MPPT control mode based on Lyapunov inverse control works.

Based on the Lyapunov maximum power point tracking mode, its duty cycle control formula is:

D为DC-DC升压变换器占空比，u_dc为同步升压DC-DC 变换器组件两侧输出电压,u_pv为第一电容两侧电压，i_pv为光伏组件输出电流，e₁,e₂为误差系数，常数k₁,k₂>0。

D is the duty ratio of the DC-DC boost converter, u _dc is the output voltage on both sides of the synchronous boost DC-DC converter module, u _pv is the voltage on both sides of the first capacitor, i _pv is the output current of the photovoltaic module, e ₁ , e ₂ is the error coefficient, the constants k ₁ , k ₂ >0.

In the constant voltage/constant current control mode, when working in the constant voltage mode, the expected voltage on both sides of the seventh capacitor C7 is subtracted from the actual measured voltage, and the expected current on the load side is calculated by the PI controller, and then compared with the actual measured voltage. The obtained current is subtracted, and the duty cycle of the DC-DC step-down converter is calculated by the PI controller. When working in the constant current mode, the expected current on the load side is directly given, and then subtracted from the actual measured current. After the PI The controller calculates the duty cycle of the synchronous step-down DC-DC converter components, which realizes constant current charging and limits the final charging voltage.

为系统在最大功率时第一电容两侧电压，i_L为流过第一电感的电流，i_L ^*为流过第一电感电流的期望值，流过第一电感电流的期望值 i_L ^*＝i_pv+k₁e₁C₁。

is the voltage on both sides of the first capacitor when the system is at maximum power, i _L is the current flowing through the first inductor, i _L ^* is the expected value of the current flowing through the first inductor, and the expected value of the current flowing through the first inductor i _L ^* = i _pv +k ₁ e ₁ C ₁ .

Figure 6 is the power change curve of the photovoltaic module when the environment changes in the MPPT mode. It can be seen from the figure that the control method can quickly respond to the tracking of the maximum power point when the environment changes.

实际电压经0.5s达到该稳态值。Figure 7-8 is the voltage and current change curve in constant voltage mode, set a given voltage

The actual voltage reaches this steady state value within 0.5s.

实际电流经2s达到该稳态值。工作过程中，PI控制器通常是用在充电器电路上的。目的是实现恒流充电的同时限制最终的充电电压。实现方式是设定两个基准参数，也就是文中期望电压、期望电流，分别用来控制电流与电压。在充电初期，因为输出电压低，没有达到电压的限制值。所以只有一个控制环路——电流环在发挥作用，输出电流被控制，工作方式为恒流输出。到了充电末期，输出电压达到了电压的限制值，这时候电压环开始发挥作用，输出电压被限制，电流环失去作用，工作方式为恒压输出。其控制对象仍为MOS管，控制变量为输出的电压和电流。Figure 9-10 is the voltage and current change curve in constant current mode, set a given current

The actual current reaches this steady state value in 2s. During the working process, the PI controller is usually used in the charger circuit. The purpose is to achieve constant current charging while limiting the final charging voltage. The implementation method is to set two reference parameters, that is, the expected voltage and expected current in the text, which are used to control the current and voltage respectively. In the early stage of charging, because the output voltage is low, the voltage limit value is not reached. So there is only one control loop - the current loop is in play, the output current is controlled, and the working mode is constant current output. At the end of charging, the output voltage reaches the limit value of the voltage. At this time, the voltage loop begins to function, the output voltage is limited, the current loop loses its function, and the working mode is constant voltage output. The control object is still the MOS tube, and the control variables are the output voltage and current.

Set the charging power value W _E , the output power value W _o of the synchronous step-down DC-DC converter component, and compare them in real time in the microcontroller. If W _o > W _E , control the first NMOS of the DC-DC boost converter The transistor VT1 and the second NMOS transistor VT2 work with a fixed duty cycle, and the seventh NMOS transistor VT ₇ and the eighth NMOS transistor VT ₈ in the synchronous step-down DC-DC converter assembly work in constant voltage/constant current mode, if W _o <W _E , the seventh NMOS transistor VT ₇ and the eighth NMOS transistor VT ₈ in the synchronous step-down DC-DC converter assembly are controlled to work with a fixed duty cycle. The first NMOS transistor VT ₁ and the second NMOS transistor VT ₂ work in the MPPT control mode based on Lyapunov inversion control.

During the working process, the output power of photovoltaic modules is not fixed due to changes in the environment, and the load of the receiving part will have a maximum power that can be tolerated, which cannot be exceeded during the working process. Therefore, the design of this application makes the output power inherently When it is not enough, it is set to work in the MPPT control mode to maintain the maximum power at this time. If the power exceeds this power, the current voltage and current are directly controlled, and the output power is limited when the voltage and current are controlled.

In this application, a synchronous DC-DC converter component is used in the DC chopper circuit of the photovoltaic power generation wireless energy transmission system, the energy transmission part adopts the LCC resonance topology, and the photovoltaic side adopts the MPPT control technology based on the Lyapunov reverse thrust control, which greatly improves the energy transfer efficiency.

Finally, it should be noted that the above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it is still possible to Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A photovoltaic power generation wireless energy transmission system, characterized in that: along the energy transmission direction, it sequentially comprises a photovoltaic side circuit, a wireless energy transmission transmitting circuit, and a wireless energy transmission receiving circuit; Wherein, the photovoltaic side circuit includes photovoltaic components and synchronous boost DC-DC converter components; The infinite energy transmission transmitting circuit includes a full-bridge inverter circuit assembly and the first half of the LCC-S resonance compensation mechanism; The infinite energy transmission and reception circuit includes the second half of the LCC-S resonance compensation component, a diode rectifier circuit component, a synchronous step-down DC-DC converter component and an electrical load; The synchronous boost DC-DC converter assembly includes a first capacitor C ₁ , one side of the first capacitor C ₁ is connected to the first inductor L ₁ , and the other side of the first capacitor C ₁ is connected in parallel with the first capacitor C 1 . The other ends of the NMOS transistor VT ₁ , the second NMOS transistor VT ₂ , the first NMOS transistor VT ₁ , and the second NMOS transistor VT ₂ are connected to two ends of the second capacitor C ₂ to form a synchronous boost DC-DC converter assembly. 2 . The photovoltaic power generation wireless energy transmission system according to claim 1 , wherein the full-bridge inverter circuit assembly comprises bridge-connected third NMOS transistor VT ₃ , fourth NMOS transistor VT ₄ , and fifth NMOS transistor VT 2 . _5. The sixth NMOS transistor VT ₆ . 3. The photovoltaic power generation wireless energy transmission system according to claim 1, wherein the first half of the LCC-S resonance compensation component is the transmitting end, and at the transmitting end, the second inductance L ₂ and the third capacitor C ₃ In series, the fourth capacitor _C4 is connected in series with the _third inductor L3 and then connected in parallel with the _third capacitor C3. The second half of the LCC-S resonance compensation component includes the output side of the LCC-S resonance compensation structure. The LCC-S resonance compensation The output side of the structure includes a fourth inductor L ₄ and a fifth capacitor C ₅ , the fourth inductor L ₄ is connected in series with the fifth capacitor C ₅ , the fourth inductor L ₄ is installed corresponding to the third inductor L ₃ , and the LCC-S resonance compensation structure The output side is connected in parallel with a diode uncontrolled rectifier circuit, and the diode uncontrolled rectifier circuit includes a bridge-connected first diode VD ₁ , a second diode VD ₂ , a third diode VD ₃ , and a fourth diode VD _4. The output of the sixth capacitor _C6 in parallel with the diode uncontrolled rectifier circuit is outputted by the sixth capacitor _C6 and then connected in parallel with a synchronous step-down DC-DC converter assembly, and the synchronous step-down DC-DC converter assembly includes a seventh NMOS The transistor VT ₇ , the eighth NMOS transistor VT ₈ , the fifth inductor L ₅ and the seventh capacitor C ₇ are connected in parallel to the output side of the synchronous step-down DC-DC converter assembly with an electrical load. 4. The photovoltaic power generation wireless energy transmission system according to claim 3, further comprising a microcontroller, the synchronous boost DC-DC converter assembly and the synchronous buck DC-DC converter assembly Each is provided with a voltage/current signal acquisition element, the signal output by the voltage/current signal acquisition element is connected to a microcontroller, and the output end of the microcontroller is connected to a control switch to control the first NMOS tube VT ₁ and the second NMOS The duty cycle working state of the transistor VT ₂ , the seventh NMOS transistor VT ₇ , and the eighth NMOS transistor VT ₈ . 5. The photovoltaic power generation wireless energy transmission system according to claim 4, wherein the first NMOS transistor VT ₁ and the second NMOS transistor VT ₂ in the synchronous boost DC-DC converter assembly are based on Lyapunov The MPPT control mode of pushback control works. 6. The photovoltaic power generation wireless energy transmission system according to claim 1, wherein the power electronic switching devices in the synchronous boost DC-DC converter assembly and the synchronous buck DC-DC converter assembly are replaced It is a fully-controlled device, and the fully-controlled device includes an NMOS, or an N-type IGBT fully-controlled device. 7. A photovoltaic power generation wireless energy transmission method, using the photovoltaic power generation wireless energy transmission system as claimed in claim 1, wherein the method comprises the following steps: (1) Photovoltaic module power generation: the photovoltaic module collects energy, and the energy is transmitted to the wireless energy transmission transmitter circuit, and the voltage is boosted through the synchronous rectification technology to form direct current a; (2) Wireless energy transmission: the direct current a is converted into alternating current through a full-bridge inverter circuit to form an alternating current b, and the alternating current b forms an alternating current c through the LCC-S resonance compensation mechanism; (3) Wireless energy reception: after the alternating current c is converted to direct current d through a diode uncontrolled rectification circuit, the voltage is reduced through synchronous rectification technology, and the direct current e is connected to the electrical load; Among them, the synchronous rectification technology is adopted, based on Lyapunov maximum power point tracking mode or constant voltage/constant current control mode; the selection of the mode is through the following steps, setting the wireless energy power output threshold W _E , synchronous step-down DC-DC converter components The output power value W _o is compared in real time in the microcontroller. If W _o > W _E , the first NMOS transistor VT ₁ and the second NMOS transistor VT ₂ of the synchronous boost DC-DC converter assembly are controlled to be fixed The duty cycle works, the seventh NMOS transistor VT ₇ and the eighth NMOS transistor VT ₈ in the synchronous step-down DC-DC converter assembly work in constant voltage/constant current mode, if W _o <W _E , control the The seventh NMOS transistor VT ₇ and the eighth NMOS transistor VT ₈ in the synchronous step-down DC-DC converter assembly work with a fixed duty cycle, and the first NMOS transistor VT ₁ in the synchronous step-up DC-DC converter assembly . The second NMOS transistor VT ₂ works in the MPPT control mode based on Lyapunov inversion control. 8 . The wireless energy transmission method for photovoltaic power generation according to claim 1 , wherein in the Lyapunov-based maximum power point tracking mode, the duty cycle control formula is: 8 .

D is the duty ratio of the DC-DC boost converter, u _dc is the output voltage on both sides of the synchronous DC-DC boost converter module, u _pv is the voltage on both sides of the first capacitor, i _pv is the output current of the photovoltaic module, e ₁ , e ₂ is the error coefficient, the constants k ₁ , k ₂ >0. 9. The wireless energy transmission method for photovoltaic power generation according to claim 8, wherein: in the constant voltage/constant current control mode, when working in the constant voltage mode, the desired voltage on both sides of the _seventh capacitor C7 is The actual measured voltage is subtracted, and the expected current on the load side is calculated by the PI controller, and then subtracted from the actual measured current, and the duty cycle of the DC-DC step-down converter is calculated by the PI controller. In the current mode, the expected current on the load side is directly given, and then subtracted from the actual measured current, and the duty cycle of the synchronous step-down DC-DC converter component is calculated by the PI controller to achieve constant current charging and limit the final Charging voltage. 10. The photovoltaic power generation wireless energy transmission method according to claim 9, wherein: the method according to claim 3, wherein:

is the voltage on both sides of the first capacitor when the system is at maximum power, i _L is the current flowing through the first inductor, i _L ^* is the expected value of the current flowing through the first inductor, and the expected value of the current flowing through the first inductor i _L ^* = i _pv +k ₁ e ₁ C ₁ .

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