CN115940437A - Series-series compensation wireless power transmission system and parameter configuration method - Google Patents

Abstract

The application relates to a series-series compensation wireless power transmission system and a parameter configuration method. The specific scheme is as follows: the system comprises a plurality of wireless power transmission modules, wherein the wireless power transmission modules are connected in parallel, each wireless power transmission module comprises a high-frequency inverter, a transmitting side compensation module, a receiving side compensation module, a coupling coil and a rectifier, and the input ends of the high-frequency inverters are connected in parallel; the output ends of the plurality of rectifiers are connected in parallel; the output end of the high-frequency inverter is connected with the input end of the coupling coil, and the output end of the coupling coil is connected with the input end of the rectifier; a compensation module is connected on a line between the output end of the high-frequency inverter and the input end of the coupling coil; and a compensation module is connected on a line between the output end of the coupling coil and the input end of the rectifier. The high-power output requirement of a wireless power transmission system is met, and the size of a single coupling coil is reduced.

Description

Series-series compensated wireless power transmission system and parameter configuration method

technical field

The present application relates to the technical field of wireless power transmission, and in particular to a series-series compensated wireless power transmission system and a parameter configuration method.

Background technique

In related technologies, the use of wireless power transmission technology in distributed photovoltaic household systems can provide a new direction for distributed photovoltaic power transmission. In-depth research on reliable new energy power consumption lays the foundation. In the case of large-capacity wireless power transmission, there is not enough housing space to install a single large-sized coupling coil at the receiving end, and a small-sized coupling coil will reduce the power density of wireless power transmission.

Contents of the invention

To this end, the present application provides a series-series compensated wireless power transmission system and a parameter configuration method. The technical scheme of the application is as follows:

According to the first aspect of the embodiments of the present application, there is provided a series-series compensated wireless power transfer system, the system includes a plurality of wireless power transfer modules, the plurality of wireless power transfer modules are connected in parallel, and the plurality of wireless power transfer modules The energy transmission module includes a high-frequency inverter, a transmitting side compensation module, a receiving side compensation module, a coupling coil and a rectifier, among which,

The input terminals of the plurality of high-frequency inverters are connected in parallel;

The output ends of the plurality of rectifiers are connected in parallel;

The output end of each of the high-frequency inverters is connected to the input end of the coupling coil belonging to the same wireless power transfer module, and the output end of each of the coupling coils is connected to the input end of the rectifier belonging to the same wireless power transfer module connect;

A compensation module is connected to the line between the output end of each of the high-frequency inverters and the input end of the coupling coil of the same wireless power transfer module;

A compensation module is connected to the line between the output end of each of the coupling coils and the corresponding input end of the rectifier.

According to an embodiment of the present application, the plurality of coupling coils are attached to each other.

According to an embodiment of the present application, the output end of each high-frequency inverter includes a first output end of the high-frequency inverter and a second output end of the high-frequency inverter, and each of the transmitting-side compensation modules includes a transmitting Side compensation capacitance, the input end of each coupling coil includes a first input end of the coupling coil and a second input end of the coupling coil, wherein,

The first output end of each of the high-frequency inverters is connected to the first end of the first compensation capacitor belonging to the same wireless power transmission module;

The second end of each of the first compensation capacitors is connected to the first input end of the coupling coil belonging to the same wireless power transfer module;

The second output end of each of the high-frequency inverters is connected to the second input end of the coupling coil belonging to the same wireless power transmission module.

According to an embodiment of the present application, each of the high-frequency inverters includes two inverter bridge arms, each of the inverter bridge arms includes two inverter sub-modules, each of the inverter Modules include switching tubes and diodes, where,

The input terminals of the plurality of high-frequency inverters are connected in parallel;

The two inverter bridge arms belonging to the same wireless power transmission module are connected in parallel, the two inverter sub-modules belonging to the same inverter bridge arm are connected in series, and the diodes and switch tubes of the same inverter sub-module are connected in reverse parallel ;

Both ends of each inverter bridge arm are connected in parallel with the two ends of the DC power supply;

The first input end of each coupling coil is connected to the second end of the first compensation capacitor belonging to the same wireless power transfer module, and the first end of each first compensation capacitor is connected to the second end of the same wireless power transfer module through a line. On the line between the two inverter sub-modules of one of the inverter bridge arms of the wireless power transfer module;

The second input end of each coupling coil is connected to the line between the two inverter sub-modules of the other inverter bridge arm belonging to the same wireless power transmission module through a line.

According to an embodiment of the present application, the output terminals of each rectifier include a first input terminal of a rectifier and a second input terminal of a rectifier, each of the receiving-side compensation modules includes a receiving-side compensation capacitor, and each of the coupling The output ends of the coils all include the first output end of the coupling coil and the second output end of the coupling coil, wherein,

The first output end of each of the coupling coils is connected to the first end of the second compensation capacitor belonging to the same wireless power transfer module;

The second end of each second compensation capacitor is connected to the first input end of the rectifier belonging to the same wireless power transfer module;

Each second output end of the coupling coil is connected to the second input end of the rectifier belonging to the same wireless power transmission module.

According to an embodiment of the present application, each of the rectifiers includes a rectifier bridge, wherein,

The output terminals of the multiple high-frequency inverters are connected in parallel;

The first output end of each of the coupling coils is connected to the first end of the second compensation capacitor belonging to the same wireless power transfer module;

The second end of each of the second compensation capacitors is connected to the first input end of the rectifier bridge belonging to the same wireless power transfer module;

The second output end of each coupling coil is connected to the second input end of the rectifier bridge belonging to the same wireless power transmission module.

According to an embodiment of the present application, each of the rectifiers further includes an energy storage capacitor, wherein,

The first end of each of the energy storage capacitors is connected to the first output end of the rectifier bridge belonging to the same rectifier;

The second end of each energy storage capacitor is connected to the second output end of the rectifier bridge belonging to the same rectifier.

According to the second aspect of the embodiments of the present application, there is provided a parameter configuration method applied to the series-series compensated wireless power transmission system described in any one of the first aspects, including:

Based on the output voltage of each high-frequency inverter and the output current of each high-frequency inverter, a calculation relational expression for the impedance of each high-frequency inverter is established;

Obtaining an imaginary part of the impedance of the high-frequency inverter based on the impedance calculation relational expression;

Acquiring the respective self-inductance values of the plurality of coupling coils and the mutual inductance values between the plurality of coupling coils;

Setting the imaginary part of the impedance of the high-frequency inverter to 0, and determining the transmit side The capacitance value of the compensation capacitor and the capacitance value of the compensation capacitor at the receiving side.

The technical solutions provided by the embodiments of the present application bring at least the following beneficial effects:

This application meets the high power output requirements of the wireless power transmission system by setting multiple wireless power transmission modules in parallel, and at the same time reduces the high electrical stress on the coupling coil of the wireless power transmission system, reduces the size of a single coupling coil, and further High power output is achieved; in addition, by setting the imaginary part of the output impedance of the high-frequency inverter to zero, the mutual inductance between multiple coupling coils is eliminated, thereby eliminating capacitive reactive power and improving the transmission efficiency of electric energy .

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Description of drawings

The accompanying drawings here are incorporated into the specification and constitute a part of the specification, show the embodiment consistent with the application, and are used together with the specification to explain the principle of the application, and do not constitute an improper limitation of the application.

FIG. 1 is a circuit diagram of a series-series compensated wireless power transmission system proposed in an embodiment of the present application;

Fig. 2 is a flowchart of a parameter configuration method of a series-series compensated wireless power transmission system proposed in an embodiment of the present application.

reference sign

101. The first high-frequency inverter; 102. The first transmitting-side compensation capacitor; 103. The first coupling coil; 104. The first receiving-side compensation capacitor; 105. The first rectifier; 106. The second high-frequency inverter 107, the second transmitting side compensation capacitor; 108, the second coupling coil; 19, the second receiving side compensation capacitor; 110, the second rectifier.

Detailed ways

In order to enable ordinary persons in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

It should be noted that the terms "first" and "second" in the description and claims of the present application and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein can be practiced in sequences other than those illustrated or described herein. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present application as recited in the appended claims.

It should be noted that in related technologies, the use of wireless power transmission technology in distributed photovoltaic household systems can provide a new direction for distributed photovoltaic power transmission. Holes can lay the foundation for in-depth research on safe and reliable new energy power consumption. In the case of large-capacity wireless power transmission, there is not enough housing space to install a single large-sized coupling coil at the receiving end, and a small-sized coupling coil will reduce the power density of wireless power transmission.

Based on the above problems, this application proposes a series-series compensation wireless power transfer system and a parameter configuration method, which can realize the high power output requirements of the wireless power transfer system by setting multiple wireless power transfer modules in parallel in this application , while reducing the high electrical stress on the coupling coil of the wireless power transfer system, reducing the size of a single coupling coil, thereby achieving high power output; in addition, by setting the imaginary part of the output impedance of the high-frequency inverter to zero, The mutual inductance between multiple coupled coils is eliminated, thereby eliminating capacitive reactive power and improving the transmission efficiency of electric energy.

In the embodiments of the present application, a series-series compensated wireless power transmission system is proposed.

The series-series compensated wireless power transfer system includes: a plurality of wireless power transfer modules connected in parallel, each of which includes a high-frequency inverter, a transmitting-side compensation module, and a receiving-side compensation modules, coupling coils and rectifiers.

Among them, the input terminals of multiple high-frequency inverters are connected in parallel; the output terminals of multiple rectifiers are connected in parallel; the output terminals of each high-frequency inverter are connected to the coupling coils of the same wireless power transfer module. The input end is connected, and the output end of each coupling coil is connected to the input end of the rectifier belonging to the same wireless power transfer module; the output end of each high-frequency inverter is connected to the input end of the coupling coil belonging to the same wireless power transfer module. A compensation module is connected to the line between each coupling coil; a compensation module is connected to the line between the output end of each coupling coil and the input end of the corresponding rectifier.

In some embodiments of the present application, multiple coupling coils are attached to each other.

As a possible example, a plurality of coupling coils are attached to each other, thereby reducing the occupied space of the system while meeting the high power output requirement of the wireless power transmission system.

In some embodiments of the present application, the output terminal of each high-frequency inverter includes a first output terminal of the high-frequency inverter and a second output terminal of the high-frequency inverter, and each transmitting-side compensation module includes a transmitting-side compensation module Capacitor, the input end of each coupling coil includes the first input end of the coupling coil and the second input end of the coupling coil, wherein the first output end of each high-frequency inverter is connected to the first compensation capacitor of the same wireless power transmission module The first end of each first compensation capacitor is connected to the first input end of the coupling coil of the same wireless power transfer module; the second output end of each high-frequency inverter is connected to the same wireless power transfer module. The second input end of the coupling coil of the transmission module is connected.

In some embodiments of the present application, each high-frequency inverter includes two inverter bridge arms, each inverter bridge arm includes two inverter sub-modules, and each inverter sub-module includes a switch tube and Diodes, wherein the input ends of multiple high-frequency inverters are connected in parallel; the two inverter bridge arms belonging to the same wireless power transfer module are connected in parallel, and the two inverter sub-modules belonging to the same inverter bridge arm are connected in series connection, the diodes belonging to the same inverter sub-module are connected in reverse parallel with the switch tube; the two ends of each inverter bridge arm are connected in parallel with the two ends of the DC power supply; the first input end of each coupling coil is connected to the same radio The second end of the first compensation capacitor of the energy transmission module is connected, and the first end of each first compensation capacitor is connected to the two inverter sub-modules of one of the inverter bridge arms belonging to the same wireless energy transmission module through a line The second input end of each coupling coil is connected to the line between the two inverter sub-modules of the other inverter bridge arm belonging to the same wireless power transmission module through the line.

In some embodiments of the present application, the output end of each rectifier includes a first input end of the rectifier and a second input end of the rectifier, each receiving-side compensation module includes a receiving-side compensation capacitor, and the output end of each coupling coil includes The first output end of the coupling coil and the second output end of the coupling coil, wherein the first output end of each coupling coil is connected to the first end of the second compensation capacitor belonging to the same wireless power transmission module; The second terminals are all connected to the first input terminal of the rectifier belonging to the same wireless power transmission module; the second output terminals of each coupling coil are connected to the second input terminal of the rectifier belonging to the same wireless power transmission module.

In some embodiments of the present application, each rectifier includes a rectifier bridge, wherein the output ends of multiple high-frequency inverters are connected in parallel; the first output end of each coupling coil is connected to the The first end of the second compensation capacitor is connected; the second end of each second compensation capacitor is connected to the first input end of the rectifier bridge belonging to the same wireless power transfer module; the second output end of each coupling coil is connected to the first input end of the rectifier bridge belonging to the same The second input end of the rectifier bridge of the wireless power transmission module is connected.

In some embodiments of the present application, each rectifier further includes an energy storage capacitor, wherein the first end of each energy storage capacitor is connected to the first output end of the rectifier bridge belonging to the same rectifier; the first end of each energy storage capacitor Both terminals are connected to the second output terminal of the rectifier bridge belonging to the same rectifier.

For example, as shown in Figure 1, the output terminal of the first high-frequency inverter 101 is connected to the input terminal of the first transmitting side compensation capacitor 102, and the output terminal of the first transmitting side compensation capacitor 102 is connected to the first coupling coil The input end of 103 is connected, the output end of the first coupling coil 103 is connected with the input end of the first receiving side compensation capacitor 104, and the output end of the first receiving side compensation capacitor 104 is connected with the input end of the first rectifier 105; Similarly, the output terminal of the second high-frequency inverter 106 is connected to the input terminal of the second transmitting side compensation capacitor 107, and the output terminal of the second transmitting side compensation capacitor 107 is connected to the input terminal of the second coupling coil 108 , the output end of the second coupling coil 108 is connected to the input end of the second receiving side compensation capacitor 109 , and the output end of the second receiving side compensation capacitor 109 is connected to the input end of the second rectifier 110 . The input terminal of the first high frequency inverter 101 is connected in parallel with the input terminal of the second high frequency inverter 106 , and the output terminal of the first rectifier 105 is also connected in parallel with the output terminal of the second rectifier 110 .

When direct current is input to the input terminal of the first high frequency inverter 101, the first high frequency inverter 101 will convert the direct current into high frequency alternating current, and the high frequency alternating current is input to the first transmitting side compensation capacitor 102. Coupling coil 103, wherein, the function of the first transmitting side compensation capacitor 102 is responsible for compensating reactive power in power transmission and filtering out high-frequency harmonics, and the function of the first coupling coil 103 is responsible for transmitting electric energy from the transmitting side to The receiving side, and then the electric energy at the receiving end is input to the input end of the first rectifier 105 through the first receiving side compensation capacitor 104, wherein the function of the first receiving side compensation capacitor 104 is responsible for compensating reactive power in power transmission and filtering high high-frequency harmonics, and the function of the first rectifier 105 is to rectify high-frequency alternating current into direct current.

According to the series-series compensated wireless power transfer system of the embodiment of the present application, by setting multiple wireless power transfer modules in parallel, it meets the high power output requirements of the wireless power transfer system, and at the same time reduces the high voltage on the coupling coil of the wireless power transfer system. The electrical stress reduces the size of a single coupling coil, and then makes full use of the existing single wireless power transmission system to achieve modular high-power output.

Fig. 2 is a flowchart of a parameter configuration method of a series-series compensated wireless power transmission system proposed in an embodiment of the present application.

As shown in Figure 2, the parameter configuration method of the series-series compensation wireless power transfer system includes:

Step 201, based on the output voltage of each high-frequency inverter and the output current of each high-frequency inverter, a calculation relational expression for the impedance of each high-frequency inverter is established.

Step 202, based on the impedance calculation relational formula, the imaginary part of the high frequency inverter impedance is obtained.

In step 203, the self-inductance values of the plurality of coupling coils and the mutual inductance values among the plurality of coupling coils are acquired.

Step 204: Set the imaginary part of the impedance of the high-frequency inverter to 0, and determine the capacitance value of the compensation capacitor on the transmitting side and the receiving-side The capacitance value of the side compensation capacitor.

It should be noted that in order to meet the high power output requirements of the wireless power transfer system, while reducing the high electrical stress on the coupling coil of the wireless power transfer system and reducing the size of a single coupling coil, a series-series compensation wireless power transfer system is proposed , can make full use of the existing single wireless power transfer system to achieve modular high-power output. However, the parallel connection of multiple wireless power transfer modules needs to solve the adverse effect of the magnetic coupling on the same side of the coupling coil on the performance characteristics. It is necessary to set the parameters of the compensation network to eliminate the coupling coils caused by the parallel connection of multiple wireless power transfer modules by the same side magnetic coupling. Interaction between.

As an example of a possible implementation, as shown in FIG. 1, L _p1 is the self-inductance of the transmitting side of the first coupling coil 103, and L _s1 is the self-inductance of the receiving side of the first coupling coil 103, and L _p2 is the self-inductance of the second coupling coil 108 is the self-inductance of the transmitting side, L _s2 is the self-inductance of the receiving side of the second coupling coil 108, M _p1s1 is the main coupling mutual inductance of L _p1 and L _s1 , M _p2s2 is the main coupling mutual inductance of L _p2 and L _s2 , and M _p1p2 is The same-side coupling mutual inductance of L _p1 and L _p2 , M _s1s2 is the same-side coupling mutual inductance of L _s1 and L _s2 , M _p1s2 is the cross-coupling mutual inductance of L _p1 and L _s2 , and M _p2s1 is the cross-coupling mutual inductance of L _p2 and L _s1 .

The compensation network parameter configuration has three functions, one is to ensure that the equivalent output impedance of the first high-frequency inverter 101 and the second high-frequency inverter 106 is purely resistive, the other is to compensate reactive power, and the third is to eliminate Influence of the same-side magnetic coupling M _p1p2 and M _s1s2 of two series-series compensated wireless power transfer systems on system characteristics. The traditional compensation network parameter configuration method only compensates the self-inductance of the coupling coil without considering the influence of the magnetic coupling M _p1p2 and M _s1s2 on the same side, resulting in the first high frequency inverter 101 and the second high frequency inverter 106 equal The effective output impedance is not purely resistive, so that the system cannot work in a resonant state. In the present invention, by calculating the output impedances of the first high-frequency inverter 101 and the second high-frequency inverter 106 considering the same-side magnetic coupling, and setting the imaginary part of the output impedance to zero, the following formula can be obtained:

Among them, U _i1 and U _i2 are the output voltage of the sum inverter respectively, I _p1 and I _p2 are the output current of the sum inverter respectively, imag() represents the imaginary part, ω is the resonant angular frequency, and the unit is rad/ s, j is the imaginary number unit, C _p1 is the capacitance value of the compensation capacitor on the first transmitting side, C _s1 is the capacitance value of the compensation capacitor on the first receiving side, C _p2 is the capacitance value of the compensation capacitor on the second transmitting side, C _s2 The capacitance value of the compensation capacitor for the second receiving side.

Solving formula (1), the parameter configuration method of C _p1 , C _s1 , C _p2 and C _s2 can be obtained as formula (2):

In the solution of the above formulas, since the imaginary part of the output impedance of the first high-frequency inverter 101 and the second high-frequency inverter 106 is zero, the output impedance of each inverter is purely resistive, and there is no inductive Or capacitive reactive power, also eliminates the influence of the same-side magnetic coupling M _p1p2 and M _s1s2 on the system characteristics.

According to the parameter configuration method of the series-series compensation wireless power transfer system of the embodiment of the present application, after considering the influence of the magnetic coupling on the same side, the imaginary part of the sum of the inverter output impedance based on the series-series compensation wireless power transfer system is: zero, so the output impedance is purely resistive; in addition, the compensation network parameter configuration considering the same-side coupling mutual inductance M _p1p2 and M _s1s2 compensates the reactive power in the system, that is, there is no inductive or capacitive reactive power in the system at this time, The output power and transmission efficiency can be improved; in addition, the equivalent output impedance of the first high-frequency inverter and the second high-frequency inverter is purely resistive, and the switching tubes that make up each inverter can realize zero-loss switching, that is, At this time, it is easy for each inverter to realize soft switching.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; can be mechanically connected, can also be electrically connected or can communicate with each other; can be directly connected, can also be indirectly connected through an intermediary, can be the internal communication of two components or the interaction relationship between two components, Unless expressly defined otherwise. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

As used herein, the terms "one embodiment," "some embodiments," "example," "specific examples," or "some examples" mean specific features, structures, materials, or features described in connection with the embodiment or example. A feature is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

Claims (8)

1. A series-series type compensation wireless power transmission system, comprising a plurality of wireless power transmission modules connected in parallel, each of the plurality of wireless power transmission modules comprising a high frequency inverter, a transmission side compensation module, a reception side compensation module, a coupling coil and a rectifier, wherein,

the input ends of the plurality of high-frequency inverters are connected in parallel;

the output ends of the plurality of rectifiers are connected in parallel;

the output end of each high-frequency inverter is connected with the input end of a coupling coil of the same wireless power transmission module, and the output end of each coupling coil is connected with the input end of a rectifier of the same wireless power transmission module;

a compensation module is connected on a line between the output end of each high-frequency inverter and the input end of the coupling coil of the same wireless power transmission module;

and a compensation module is connected on a line between the output end of each coupling coil and the corresponding input end of the rectifier.

2. The system of claim 1, wherein the plurality of coupling coils are arranged in close proximity.

3. The system of claim 1, wherein the output of each high frequency inverter comprises a first output of the high frequency inverter and a second output of the high frequency inverter, wherein each transmit side compensation module comprises a transmit side compensation capacitor, wherein the input of each coupling coil comprises a first input of the coupling coil and a second input of the coupling coil, and wherein,

the first output end of each high-frequency inverter is connected with the first end of the first compensation capacitor of the same wireless power transmission module;

the second end of each first compensation capacitor is connected with the first input end of the coupling coil of the same wireless power transmission module;

and the second output end of each high-frequency inverter is connected with the second input end of the coupling coil of the same wireless power transmission module.

4. The system of claim 3, wherein each of the high frequency inverters comprises two inverter leg, each of the inverter leg comprises two inverter sub-modules, each of the inverter sub-modules comprises a switch tube and a diode, wherein,

the input ends of the plurality of high-frequency inverters are connected in parallel;

the two inverter bridge arms of the same wireless power transmission module are connected in parallel, the two inverter submodules of the same inverter bridge arm are connected in series, and the diodes of the same inverter submodules are connected with the switch tube in reverse parallel;

two ends of each inverter bridge arm are connected with two ends of a direct current power supply in parallel;

a first input end of each coupling coil is connected with a second end of the first compensation capacitor of the same wireless power transmission module, and a first end of each first compensation capacitor is connected to a line between two inversion submodules of one inversion bridge arm of the same wireless power transmission module through a line;

and the second input end of each coupling coil is connected to a line between two inversion submodules of the other inversion bridge arm of the same wireless power transmission module through a line.

5. The system of claim 1, wherein the output of each rectifier comprises a rectifier first input and a rectifier second input, wherein the receive-side compensation modules each comprise a receive-side compensation capacitor, wherein the output of each coupling coil comprises a coupling coil first output and a coupling coil second output, and wherein,

a first output end of each coupling coil is connected with a first end of the second compensation capacitor of the same wireless power transmission module;

the second end of each second compensation capacitor is connected with the first input end of the rectifier of the same wireless power transmission module;

and the second output end of each coupling coil is connected with the second input end of the rectifier of the same wireless power transmission module.

6. The system of claim 5, wherein each of the rectifiers comprises a rectifier bridge, wherein,

the output ends of the plurality of high-frequency inverters are connected in parallel;

a first output end of each coupling coil is connected with a first end of the second compensation capacitor of the same wireless power transmission module;

the second end of each second compensation capacitor is connected with the first input end of the rectifier bridge of the same wireless power transmission module;

and the second output end of each coupling coil is connected with the second input end of the rectifier bridge of the same wireless power transmission module.

7. The system of claim 6, wherein each of the rectifiers further comprises an energy storage capacitor, wherein,

the first end of each energy storage capacitor is connected with the first output end of the rectifier bridge of the same rectifier;

and the second end of each energy storage capacitor is connected with the second output end of the rectifier bridge of the same rectifier.

8. A parameter configuration method applied to the series-series compensation wireless power transmission system of any one of claims 1 to 7, comprising:

establishing a calculation relation of each high-frequency inverter impedance based on the output voltage of each high-frequency inverter and the output current of each high-frequency inverter;

acquiring an imaginary part of the impedance of the high-frequency inverter based on the impedance calculation relation;

acquiring self-inductance values of the plurality of coupling coils and mutual inductance values among the plurality of coupling coils;

setting the imaginary part of the high-frequency inverter impedance to be 0, and respectively determining the capacitance value of the transmitting side compensation capacitor and the capacitance value of the receiving side compensation capacitor based on the obtained self-inductance values of the plurality of coupling coils and the mutual inductance values among the plurality of coupling coils.

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