阅读说明：本技术 一种组件光功率跟踪电路 (Optical power tracking circuit of component ) 是由 陶文婷 董爱法 田源 耿方东 殷顺 葛艳莉 万露 孙超 于 2021-09-26 设计创作，主要内容包括：本发明公开了一种组件光功率跟踪电路,包括判别器、控制单元和和mosfet器件,所述判别器包括bypass判别器和buck判别器,所述控制单元包括bypass控制单元和buck控制单元,所述bypass判别器用于判别并调节跟踪电路处于bypass工作模式,所述buck判别器用于判别并调节跟踪电路处于buck工作模式,所述bypass控制单元用于控制bypass工作模式的具体执行,所述buck控制单元用于控制buck工作模式的具体执行。通过光功率跟踪触发驱动电路的智能算法控制逻辑开发,实现非线性电路的参数优化,并通过驱动优化电路实现bypass和buck电路的协同调节并实现组件最优二级补偿或二级关断,同时为组串的柔性设计提供前提保障。本发明实现了组件级和组串级最大光功率跟踪和组件快速关断需求。(The invention discloses a component optical power tracking circuit which comprises a discriminator, a control unit and a mosfet device, wherein the discriminator comprises a bypass discriminator and a buck discriminator, the control unit comprises a bypass control unit and a buck control unit, the bypass discriminator is used for discriminating and adjusting the tracking circuit to be in a bypass working mode, the buck discriminator is used for discriminating and adjusting the tracking circuit to be in a buck working mode, the bypass control unit is used for controlling the specific execution of the bypass working mode, and the buck control unit is used for controlling the specific execution of the buck working mode. The intelligent algorithm control logic development of the light power tracking trigger driving circuit is used for realizing the parameter optimization of the nonlinear circuit, realizing the cooperative adjustment of bypass and buck circuits through the driving optimization circuit, realizing the optimal secondary compensation or secondary turn-off of the component and simultaneously providing a precondition guarantee for the flexible design of the string. The invention realizes the maximum optical power tracking of the component level and the group string level and the requirement of quick turn-off of the component.)

1. The utility model provides a subassembly optical power tracking circuit, its characterized in that, includes arbiter, the control unit and mosfet device, the arbiter includes bypass arbiter and buck arbiter, the control unit includes bypass the control unit and buck the control unit, the bypass arbiter is used for distinguishing and adjusting tracking circuit and is in bypass mode, the buck arbiter is used for distinguishing and adjusts tracking circuit and is in buck mode, bypass the control unit is used for controlling the concrete execution of bypass mode, the buck the control unit is used for controlling the concrete execution of buck mode.

2. The module optical power tracking circuit of claim 1, wherein in the bypass mode of operation, the tracking circuit does not participate in module output voltage and current regulation, and the module output voltage and current are consistent with the output of the optical power tracking circuit; in the buck working mode, the tracking circuit participates in regulation of output voltage and current of the component, the output voltage of the component is subjected to voltage reduction regulation by the optical power tracking circuit, and the output current of the component is subjected to current rise regulation by the optical power tracking circuit.

3. The device optical power tracking circuit of claim 2, wherein the buck control unit executes logic output of the command current or voltage, and then the output command current or voltage controls regulation to complete coordinated tracking regulation of the device output voltage and current with the output voltage and current of the optical power tracking circuit.

4. The module optical power tracking circuit of claim 1, wherein the tracking circuit further comprises a pulse trigger circuit, and the pulse trigger circuit is controlled to operate by the driving signal instruction, so as to perform PFM/PWM control on the buck control unit.

5. The module optical power tracking circuit of claim 4, wherein the pulse trigger circuit routing logic control unit performs error tracking and constraint step convergence limitation with a global constraint performance parameter function, and implements nonlinear function regression fitting with an RBF network to complete cascade coordination trigger control of the multi-optical power tracking circuit.

6. The component optical power tracking circuit of claim 5, wherein the component comprises an abnormal component, a normal component, and a failed component, the optical power tracking current of the abnormal component optical power tracking circuit matches a secondary conversion current at a maximum optical power of the normal component optical power tracking circuit, and the secondary conversion current is a current value at a maximum power output tracked by the abnormal component optical power tracking circuit.

7. The optical power tracking circuit of claim 6, wherein the optical power tracking circuit of the module implements buck mode of operation of the abnormal module in a line selection manner, implements excellent power cooperative tracking on the normal module, and implements fast turn-off of the module by using the switching characteristic of the pulse trigger circuit.

8. The package optical power tracking circuit of claim 7, wherein the resistance and capacitance matching of the control circuit used by the PFM/PWM control is a non-linear matching, and the embedded control adjustment is implemented through the resistance and capacitance parameter tolerance range trained by the RBF network.

9. The package optical power tracking circuit of claim 8, wherein the bypass mode of operation employs global maximum power coordinated tracking with the capacitive circuit in series charge; and the abnormal component and the normal component in the buck working mode adopt excellent power cooperative tracking, a capacitor circuit of the abnormal component and the normal component are in a series charging state, a fault component is in a turn-off state, and the capacitor circuit of the fault component is in a series-parallel discharging state.

10. The component optical power tracking circuit according to one of claims 1 to 9, further comprising a chip protection control loop.

Technical Field

The invention relates to component power optimization in the photovoltaic field, in particular to a component optical power tracking circuit.

Background

The components comprise a capacitor circuit, the output power of the components is influenced by the components and environmental factors, the output power of the components is mismatched, the output current of the string is limited by the lowest output current of the single components, and the final power output of the string is not the ideal power for maximum power tracking. Factors such as shadow occlusion of components, contamination loss, hot spot effect, and positive and negative bias can all result in output power loss. In the light field design, in order to ensure that the output power of the component group string is maximum, the requirement on the orientation design is high, and particularly, roof photovoltaic with an inclination angle or not in the positive south direction, the traditional design inevitably causes the BOS cost and the LCOE cost to rise. Arc protection and safety voltage requirements in building integrated photovoltaic are strict in the specifications of UL 1699B-2018, IEC 62548 and the like. At present, relevant companies of the photovoltaics industry such as Huashi, Jingke, Tianhe optical energy, Siemens and SolarEdge carry out prospective research aiming at the aspects, but are limited by the influence of cost factors, and the popularization of commercial application is seriously restricted.

Disclosure of Invention

In view of the above-mentioned shortcomings, the present invention provides a module optical power tracking circuit, which can trigger the intelligent algorithm control logic development of the driving circuit through optical power tracking to realize the parameter optimization of the nonlinear circuit.

In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:

the utility model provides a subassembly optical power tracking circuit, includes arbiter, the control unit and mosfet device, the arbiter includes bypass arbiter and buck arbiter, the control unit includes bypass the control unit and buck the control unit, the bypass arbiter is used for distinguishing and adjusts tracking circuit and is in bypass mode, the buck arbiter is used for distinguishing and adjusts tracking circuit and is in buck mode, bypass the control unit is used for controlling the concrete execution of bypass mode, the buck the control unit is used for controlling the concrete execution of buck mode.

According to one aspect of the invention, in the bypass operation mode, the tracking circuit does not participate in the regulation of the output voltage and current of the component, and the output voltage and current of the component are consistent with the output of the optical power tracking circuit; in the buck working mode, the tracking circuit participates in regulation of output voltage and current of the component, the output voltage of the component is subjected to voltage reduction regulation by the optical power tracking circuit, and the output current of the component is subjected to current rise regulation by the optical power tracking circuit.

According to one aspect of the invention, the buck control unit executes logic output of the command current or voltage, and then the output command current or voltage controls and regulates to complete coordinated tracking regulation of the component output voltage and current and the output voltage and current of the optical power tracking circuit.

According to one aspect of the invention, the tracking circuit further comprises a pulse trigger circuit, and the pulse trigger circuit is controlled to operate through the driving signal instruction, so that the buck control unit is subjected to PFM/PWM control.

According to one aspect of the invention, the pulse trigger circuit logic control unit performs error tracking and convergence limitation of a set step length by using a global constraint performance parameter function, and realizes nonlinear function regression fitting by using an RBF network to complete cascade coordination trigger control of the multi-light power tracking circuit.

According to an aspect of the present invention, the components include an abnormal component, a normal component, and a failed component, the optical power tracking current of the abnormal component optical power tracking circuit matches the secondary conversion current in the case of the maximum optical power of the normal component optical power tracking circuit, and the secondary conversion current is a current value in the case of the maximum power output tracked by the abnormal component optical power tracking circuit.

According to one aspect of the invention, the component optical power tracking circuit realizes a buck working mode of an abnormal component in a line selection mode, realizes excellent power cooperative tracking on the normal component, and realizes quick turn-off of the component through the switching characteristic of the pulse trigger circuit.

According to one aspect of the invention, the resistance and capacitance matching of the control circuit used by the PFM/PWM control is nonlinear matching, and embedded control regulation is realized through the resistance and capacitance parameter fault tolerance range trained by the RBF network.

According to one aspect of the invention, the bypass operating mode adopts global maximum power cooperative tracking, and a capacitor circuit of the bypass operating mode is in a series charging state; and the abnormal component and the normal component in the buck working mode adopt excellent power cooperative tracking, a capacitor circuit of the abnormal component and the normal component are in a series charging state, a fault component is in a turn-off state, and the capacitor circuit of the fault component is in a series-parallel discharging state.

In accordance with an aspect of the invention, the component optical power tracking circuit further comprises a chip protection control loop

The implementation of the invention has the advantages that: the invention discloses a component optical power tracking circuit which comprises a discriminator, a control unit and a mosfet device, wherein the discriminator comprises a bypass discriminator and a buck discriminator, the control unit comprises a bypass control unit and a buck control unit, the bypass discriminator is used for discriminating and adjusting the tracking circuit to be in a bypass working mode, the buck discriminator is used for discriminating and adjusting the tracking circuit to be in a buck working mode, the bypass control unit is used for controlling the specific execution of the bypass working mode, and the buck control unit is used for controlling the specific execution of the buck working mode. The intelligent algorithm control logic development of the light power tracking trigger driving circuit is used for realizing the parameter optimization of the nonlinear circuit, realizing the cooperative adjustment of bypass and buck circuits through the driving optimization circuit, realizing the optimal secondary compensation or secondary turn-off of the component and simultaneously providing a precondition guarantee for the flexible design of the string. The invention realizes the maximum optical power tracking of the component level and the group string level and the requirement of quick turn-off of the component.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of a component optical power tracking circuit according to the present invention;

FIG. 2 is a schematic diagram illustrating the pulse width and phase control of the driving signal according to the present invention;

FIG. 3 is a block diagram of an RBF network according to the present invention;

fig. 4 is a schematic diagram illustrating a switching principle of the working mode according to 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.

As shown in fig. 1, 2, 3, and 4, a component optical power tracking circuit includes a discriminator, a control unit, and a mosfet device, where the discriminator includes a bypass discriminator and a buck discriminator, the control unit includes a bypass control unit and a buck control unit, the bypass discriminator is used to discriminate and regulate that the tracking circuit is in a bypass operation mode, the buck discriminator is used to discriminate and regulate that the tracking circuit is in a buck operation mode, the bypass control unit is used to control specific execution of the bypass operation mode, and the buck control unit is used to control specific execution of the buck operation mode.

In practical application, in the bypass working mode, the tracking circuit does not participate in regulation of the output voltage and current of the component, and the output voltage and current of the component are consistent with the output of the optical power tracking circuit; in the buck working mode, the tracking circuit participates in regulation of output voltage and current of the component, the output voltage of the component is subjected to voltage reduction regulation by the optical power tracking circuit, and the output current of the component is subjected to current rise regulation by the optical power tracking circuit.

In practical applications, the control logic of the optical power tracking circuit is shown in fig. 1.

In practical application, the buck control unit executes logic output of the instruction current or voltage, and then the output instruction current or voltage is used for controlling and adjusting to complete coordinated tracking adjustment of the output voltage and current of the component and the output voltage and current of the optical power tracking circuit.

In practical application, the tracking circuit further comprises a pulse trigger circuit, and the pulse trigger circuit is controlled to work through a driving signal instruction, so that PFM/PWM control is performed on the buck control unit.

In practical applications, the pulse width and phase control of the driving signal command is schematically shown in fig. 2, and the driving circuit is formed by a push-pull structure circuit with OC and photoelectric coupling.

In practical application, the pulse trigger circuit logic control unit performs error tracking and convergence limitation of a set step length by using a global constraint performance parameter function, and realizes nonlinear function regression fitting by using an RBF network to complete cascade coordination trigger control of the multi-light power tracking circuit.

In practical application, the structure of the RBF network is shown in fig. 3, wherein the radial basis function is a gaussian function, and then the RBF network activates the function||m_x-n_y| | is the Euclidean norm, δ is the Gaussian variance, n_yIs a gaussian center.

In practical application, the components comprise an abnormal component, a normal component and a fault component, the optical power tracking current of the optical power tracking circuit of the abnormal component is matched with the secondary conversion current under the condition of the maximum optical power of the optical power tracking circuit of the normal component, and the secondary conversion current is the current value under the condition of the maximum power output tracked by the optical power tracking circuit of the abnormal component.

In practical application, the module optical power tracking circuit realizes a buck working mode of an abnormal module in a line selection mode, realizes excellent power cooperative tracking on a normal module, and realizes quick turn-off of the module through the switching characteristic of the pulse trigger circuit.

In practical application, the matching of the resistor and the capacitor of the control circuit used by the PFM/PWM control is nonlinear matching, and embedded control and adjustment are realized through the fault-tolerant range of resistor and capacitor parameters trained by the RBF network.

In practical application, the bypass working mode adopts global maximum power cooperative tracking, and a capacitor circuit is in a series charging state; and the abnormal component and the normal component in the buck working mode adopt excellent power cooperative tracking, a capacitor circuit of the abnormal component and the normal component are in a series charging state, a fault component is in a turn-off state, and the capacitor circuit of the fault component is in a series-parallel discharging state.

In practical application, the working mode switching principle of this embodiment is as shown in fig. 4, the optical power tracking triggers the series-parallel control of the driving circuit, and the maximum safe power output of the current and voltage of the group cascade stage is realized by the secondary compensation or the secondary turn-off of the component-level optical power tracking circuit.

In practical application, the optical power tracking circuit of the module further comprises a chip protection control loop

In practical application, the invention uses the component-level optical power tracking circuit to implement secondary compensation or secondary shutdown on abnormal components or fault components of the group string level, thereby ensuring the maximum safe power output by the group string with maximum efficiency. Compared with the traditional series circuit design, the invention can greatly improve the output power, realize the quick turn-off of the component-level fault circuit and meet the flexible design requirement of severe geographic environment.

The implementation of the invention has the advantages that: the invention discloses a component optical power tracking circuit which comprises a discriminator, a control unit and a mosfet device, wherein the discriminator comprises a bypass discriminator and a buck discriminator, the control unit comprises a bypass control unit and a buck control unit, the bypass discriminator is used for discriminating and adjusting the tracking circuit to be in a bypass working mode, the buck discriminator is used for discriminating and adjusting the tracking circuit to be in a buck working mode, the bypass control unit is used for controlling the specific execution of the bypass working mode, and the buck control unit is used for controlling the specific execution of the buck working mode. The intelligent algorithm control logic development of the light power tracking trigger driving circuit is used for realizing the parameter optimization of the nonlinear circuit, realizing the cooperative adjustment of bypass and buck circuits through the driving optimization circuit, realizing the optimal secondary compensation or secondary turn-off of the component and simultaneously providing a precondition guarantee for the flexible design of the string. The invention realizes the maximum optical power tracking of the component level and the group string level and the requirement of quick turn-off of the component.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention disclosed herein are intended to be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.