A distributed photovoltaic power compensation device and method

Abstract

The application provides a kind of distributed photovoltaic electric energy compensation device and method, the device obtains the output voltage amplitude and harmonic power of distributed photovoltaic by multiple data measurement modules, load side energy data and power supply side output data, through electric energy compensation module, according to the data obtained, analysis processing is carried out, generates electric energy compensation execution instruction, voltage control instruction and energy control instruction, to control the output of distributed photovoltaic storage.The device and method collect data by installing data measurement module at distributed photovoltaic, load side and power supply side respectively, establish the measurement capability of distributed photovoltaic, realize the accurate measurement of distributed photovoltaic electric energy with dynamic wide frequency characteristics;And through the voltage stability algorithm and energy planning algorithm set, generate voltage control instruction and energy control instruction based on the data transmitted by data measurement module to control distributed photovoltaic, improve the power quality of distributed photovoltaic.

Description

Technical Field

[0001] This invention relates to the field of electricity metering technology, and more specifically, to a distributed photovoltaic power compensation device and method. Background Technology

[0002] The large-scale grid connection of renewable energy sources, primarily distributed photovoltaic power, will pose significant challenges to the power system and also impact electricity metering. The impact on electricity metering mainly includes the following two aspects:

[0003] 1. Wideband dynamic current measurement capability. Distributed photovoltaic power includes DC and harmonic components in addition to the fundamental frequency, which will affect the metering system. The output power of distributed photovoltaic power will fluctuate frequently due to climate, and the magnetic field changes generated by repeated current fluctuations will cause magnetic fatigue or damage to the magnetic properties of the transformer / sensor core.

[0004] 2. Distributed Photovoltaic Power Quality Compensation. Many small, scattered businesses install photovoltaic systems on their rooftops. To maximize profits, these businesses use inexpensive and low-quality inverters, resulting in poor power quality. Furthermore, because photovoltaic systems are dynamic harmonic sources, power companies may not be able to detect these issues in a timely manner during standard inspections, leading to ineffective control over the power quality of the photovoltaic output.

[0005] In summary, after a large number of distributed photovoltaic (PV) systems are connected to the grid, it is necessary to improve the performance of instrument transformers / sensors to achieve wideband dynamic power metering. The power quality of distributed PV output is low, so it is necessary to study power quality compensation technologies.

[0006] Therefore, there is an urgent need for a technology that can provide distributed photovoltaic (PV) measurement capabilities to achieve accurate measurement of dynamic broadband PV power, and can also conduct research on energy planning and energy compensation technologies based on the dynamic characteristics of distributed PV to improve the power quality of distributed PV. Summary of the Invention

[0007] To address the problems of poor broadband dynamic power metering and low power quality of distributed photovoltaic output after grid connection in existing technologies, this invention provides a distributed photovoltaic power compensation device and method.

[0008] According to one aspect of the present invention, a distributed photovoltaic power compensation device is provided, the device comprising:

[0009] Multiple data measurement modules are used to acquire the output voltage amplitude and harmonic power of distributed photovoltaic power, load-side energy consumption data and power supply-side output data, respectively.

[0010] The power compensation module is used to generate power compensation instructions based on the energy consumption data and set safety constraints. When the energy consumption data meets the safety constraints, the power compensation instruction is to execute power compensation; when the energy consumption data does not meet the safety constraints, the power compensation instruction is to terminate power compensation. When the power compensation instruction is to execute power compensation, it outputs a voltage control instruction based on the change in the output voltage amplitude of the distributed photovoltaic system according to a set voltage stabilization algorithm; and / or determines the optimal energy consumption scheme for the load side based on the power supply side output data, load side energy consumption data, the output voltage amplitude of the distributed photovoltaic system, and harmonic power according to a set energy consumption planning algorithm. When the electricity cost determined by the optimal energy consumption scheme is not greater than a set electricity cost threshold, it outputs an energy consumption control instruction according to the optimal energy consumption scheme; and generates a control signal based on the voltage control instruction and the energy consumption control instruction, which is then transmitted to the distributed photovoltaic system.

[0011] Optionally, the device further includes a communication module for transmitting data between the data measurement module and the power compensation module.

[0012] Optionally, the data measurement module includes:

[0013] The data acquisition unit is used to sample analog voltage / current waveforms according to the set sampling rate, and generate distributed photovoltaic sampling signals, load-side sampling signals and power supply-side sampling signals;

[0014] The signal processing unit is used to perform spectrum analysis of distributed photovoltaic power on the sampled signals of distributed photovoltaic power based on the Fast Fourier Transform (FFT) algorithm, and to calculate the load-side energy consumption data based on the sampled signals of the load side and the power output data based on the sampled signals of the power supply side.

[0015] The signal output unit is used to output the output voltage amplitude and harmonic power of the distributed photovoltaic system, as well as the load-side energy consumption data and the power supply-side output data, according to the set frequency.

[0016] Optionally, the power compensation module includes:

[0017] The algorithm processing unit is configured to generate an energy compensation instruction based on the energy consumption data and set safety constraints. When the energy consumption data meets the safety constraints, the energy compensation instruction is to execute energy compensation; when the energy consumption data does not meet the safety constraints, the energy compensation instruction is to terminate energy compensation. When the energy compensation instruction is to execute energy compensation, a voltage control instruction is output based on the change in the output voltage amplitude of the distributed photovoltaic system according to a set voltage stabilization algorithm. And / or, based on a set energy consumption planning algorithm, an optimal energy consumption scheme for the load side is determined based on power supply side output data, load side energy consumption data, the output voltage amplitude of the distributed photovoltaic system, and harmonic power. When the electricity cost determined by the optimal energy consumption scheme is not greater than a set electricity cost threshold, an energy consumption control instruction is output according to the optimal energy consumption scheme.

[0018] The trigger circuit is used to open and close the circuit according to the power compensation command. When the power compensation command is to execute power compensation, the trigger circuit is open; when the power compensation command is to end power compensation, the trigger circuit is closed.

[0019] The first control circuit is used to perform I / O control according to voltage control command and power control command when the trigger circuit is turned on, and generate I / O control signal.

[0020] The second control circuit is used to switch capacitive electronic devices on and off according to the I / O control signal, generate a capacitor parameter adjustment signal, and transmit it to the distributed photovoltaic system.

[0021] Optionally, the first control circuit is a three-phase bridge fully controlled rectifier bridge.

[0022] According to another aspect of the present invention, a distributed photovoltaic power compensation method is provided, the method comprising:

[0023] The output voltage amplitude and harmonic power of distributed photovoltaic power, load-side energy consumption data and power supply-side output data are obtained respectively.

[0024] Based on the energy consumption data and the set safety constraints, an energy compensation instruction is generated. When the energy consumption data meets the safety constraints, the energy compensation instruction is to execute energy compensation; when the energy consumption data does not meet the safety constraints, the energy compensation instruction is to terminate energy compensation.

[0025] When the power compensation command is to execute power compensation, the voltage control command is output based on the change in the output voltage amplitude of the distributed photovoltaic system according to the set voltage stabilization algorithm; and / or the optimal energy consumption scheme for the load side is determined based on the power supply side output data, load side energy consumption data, output voltage amplitude and harmonic power of the distributed photovoltaic system according to the set energy consumption planning algorithm.

[0026] When the electricity cost determined by the optimal energy consumption scheme is not greater than the set electricity cost threshold, an energy consumption control command is output according to the optimal energy consumption scheme.

[0027] Control signals are generated based on the voltage control command and energy consumption control command and transmitted to the distributed photovoltaic system.

[0028] Optionally, the output voltage amplitude and harmonic power of the distributed photovoltaic system, load-side energy consumption data, and power supply-side output data are obtained, including:

[0029] The analog voltage / current waveforms are sampled according to the set sampling rate to generate distributed photovoltaic sampling signals, load-side sampling signals, and power supply-side sampling signals.

[0030] Based on the Fast Fourier Transform (FFT) algorithm, we perform spectral analysis of distributed photovoltaic power generation on the sampled signals of distributed photovoltaic systems, calculate load-side energy consumption data based on the sampled signals of the load side, and calculate power output data based on the sampled signals of the power supply side.

[0031] The system outputs the distributed photovoltaic system's output voltage amplitude and harmonic power, load-side energy consumption data, and power supply-side output data at the set frequency.

[0032] Optionally, after generating the power compensation command based on the energy consumption data and the set safety constraints, the method further includes:

[0033] The circuit is switched on and off according to the power compensation command. When the power compensation command is to execute power compensation, the circuit is triggered to open. When the power compensation command is to end power compensation, the circuit is triggered to close.

[0034] Optionally, generating control signals based on the voltage control commands and energy consumption control commands and transmitting them to the distributed photovoltaic system includes:

[0035] When the trigger circuit is turned on, I / O control is performed according to the voltage control command and the power control command, and I / O control signals are generated.

[0036] The capacitor electronic device is switched on and off according to the I / O control signal, and a capacitor parameter adjustment signal is generated.

[0037] According to another aspect of the present invention, a computer-readable storage medium is provided, the storage medium storing a computer program for performing the method described in any of the preceding claims.

[0038] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0039] processor;

[0040] Memory used to store the processor's executable instructions;

[0041] The processor is configured to read the executable instructions from the memory and execute the instructions to implement the method of any of the preceding claims.

[0042] The distributed photovoltaic power compensation device and method provided by this invention acquires the output voltage amplitude and harmonic power of the distributed photovoltaic system, load-side energy consumption data, and power supply-side output data through multiple data measurement modules. The power compensation module generates a power compensation command based on the energy consumption data and set safety constraints. Specifically, when the energy consumption data meets the safety constraints, the power compensation command executes power compensation; when the energy consumption data does not meet the safety constraints, the power compensation command terminates power compensation. When the power compensation command executes power compensation, a voltage control command is output based on the change in the output voltage amplitude of the distributed photovoltaic system according to a set voltage stabilization algorithm; and / or, based on a set energy consumption planning algorithm, an optimal energy consumption scheme for the load side is determined based on the power supply-side output data, load-side energy consumption data, and the output voltage amplitude and harmonic power of the distributed photovoltaic system. When the energy cost determined by the optimal energy consumption scheme is not greater than a set energy cost threshold, an energy consumption control command is output according to the optimal energy consumption scheme; and a control signal is generated based on the voltage control command and the energy consumption control command and transmitted to the distributed photovoltaic system. The device and method establish distributed photovoltaic measurement capabilities by installing data measurement modules at the distributed photovoltaic site, the load side, and the power supply side to collect data, thereby achieving accurate measurement of distributed photovoltaic power with dynamic broadband characteristics. Furthermore, by setting voltage stabilization and energy consumption planning algorithms, voltage control commands and energy consumption control commands are generated based on the data transmitted by the data measurement modules to control the distributed photovoltaic system, thus improving the power quality of the distributed photovoltaic system. Attached Figure Description

[0043] Exemplary embodiments of the present invention can be more fully understood by referring to the following figures:

[0044] Figure 1 This is a schematic diagram of the structure of a distributed photovoltaic power compensation device according to a preferred embodiment of the present invention;

[0045] Figure 2 This is a schematic diagram illustrating the configuration of a distributed photovoltaic power compensation device according to a preferred embodiment of the present invention in a practical application.

[0046] Figure 3 This is a schematic diagram of the data measurement module according to a preferred embodiment of the present invention;

[0047] Figure 4 This is a schematic diagram of the power compensation module according to a preferred embodiment of the present invention;

[0048] Figure 5 This is a flowchart illustrating a distributed photovoltaic power compensation method according to a preferred embodiment of the present invention.

[0049] Figure 6 This is a schematic diagram of an electronic device structure according to a preferred embodiment of the present invention. Detailed Implementation

[0050] Exemplary embodiments of the invention will now be described with reference to the accompanying drawings. However, the invention may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided to fully and completely disclose the invention and to fully convey its scope to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the drawings is not intended to limit the invention. In the drawings, the same units / elements are referred to by the same reference numerals.

[0051] Unless otherwise stated, the terms used herein (including technical terms) have their common meaning as understood by one of ordinary skill in the art. Furthermore, it is understood that terms defined in commonly used dictionaries should be understood to have a meaning consistent with the context of their relevant field, and not to be interpreted as having an idealized or overly formal meaning.

[0052] Exemplary device

[0053] Figure 1 This is a schematic diagram of the structure of a distributed photovoltaic power compensation device according to a preferred embodiment of the present invention. Figure 1 As shown, the distributed photovoltaic power compensation device 100 of this preferred embodiment includes:

[0054] Multiple data measurement modules 101 are used to acquire the output voltage amplitude and harmonic power of distributed photovoltaic power, load-side energy consumption data and power supply-side output data, respectively.

[0055] The power compensation module 102 is used to generate power compensation instructions based on the energy consumption data and set safety constraints. When the energy consumption data meets the safety constraints, the power compensation instruction is to execute power compensation; when the energy consumption data does not meet the safety constraints, the power compensation instruction is to terminate power compensation. When the power compensation instruction is to execute power compensation, it outputs a voltage control instruction based on the change in the output voltage amplitude of the distributed photovoltaic system according to a set voltage stabilization algorithm; and / or determines the optimal energy consumption scheme for the load side based on the power supply side output data, load side energy consumption data, the output voltage amplitude of the distributed photovoltaic system, and harmonic power according to a set energy consumption planning algorithm. When the electricity cost determined by the optimal energy consumption scheme is not greater than a set electricity cost threshold, it outputs an energy consumption control instruction according to the optimal energy consumption scheme; and generates a control signal based on the voltage control instruction and the energy consumption control instruction, which is then transmitted to the distributed photovoltaic system.

[0056] Preferably, the device further includes a communication module for transmitting data between the data measurement module and the power compensation module.

[0057] In one embodiment, the communication module can employ wired and / or wireless transmission methods to achieve interconnection between devices. Specifically, wired transmission using power line carrier technology is used in remote areas with poor signal strength, while wireless transmission can be used within hub-and-spoke new energy substations.

[0058] Figure 2 This is a schematic diagram illustrating the configuration of a distributed photovoltaic power compensation device according to a preferred embodiment of the present invention in a practical application. Figure 2 As shown, in an actual power project including a solar panel APM photovoltaic output side (distributed photovoltaic), a 220V / 400V distribution network (power supply side), and users (load side), the data measurement module 101 is installed in a modular form in the IoT meters on the power supply side and the load side. It should be noted that when the data measurement module 101 is installed in the IoT meters, the data acquisition part and the current transformers / sensors of the distributed photovoltaic are not required. The power and electrical parameter information of the current transformers in the photovoltaic area, the user IoT meters, and the IoT meters at the boundary between the power grid and the user's property are collected through wireless communication. The power compensation module 101 is installed in the photovoltaic area and performs voltage control and energy consumption control based on the transmitted data to realize power output.

[0059] Figure 3 This is a schematic diagram of the structure of a data measurement module according to a preferred embodiment of the present invention. As shown in FIG3, the data measurement module 101 includes:

[0060] The data acquisition unit 111 is used to sample analog voltage / current waveforms according to the set sampling rate, and generate distributed photovoltaic sampling signals, load-side sampling signals and power supply-side sampling signals.

[0061] The signal processing unit 112 is used to perform spectrum analysis of distributed photovoltaic power on the distributed photovoltaic sampling signal based on the Fast Fourier Transform (FFT) algorithm, and to calculate load-side energy consumption data based on the load-side sampling signal and calculate power supply output data based on the power supply-side sampling signal.

[0062] The signal output unit 113 is used to output the output voltage amplitude and harmonic power of the distributed photovoltaic system, load-side energy consumption data and power supply-side output data according to the set frequency.

[0063] In one embodiment, for Figure 2 The data measurement module is installed in the transformers / sensors of distributed photovoltaic systems. The data acquisition unit completes the sampling of analog voltage / current waveforms at a 4kHz sampling rate. The signal processing unit completes the spectrum analysis of distributed photovoltaic power based on the FFT algorithm. The signal output unit outputs the voltage amplitude and the power of the 2nd to 50th harmonics at a 1-minute frequency.

[0064] Figure 4 This is a schematic diagram of the structure of a power compensation module according to a preferred embodiment of the present invention. As shown in FIG4, the power compensation module 102 includes:

[0065] Algorithm processing unit 121 is configured to generate an energy compensation instruction based on the energy consumption data and set safety constraints. When the energy consumption data meets the safety constraints, the energy compensation instruction is to execute energy compensation; when the energy consumption data does not meet the safety constraints, the energy compensation instruction is to terminate energy compensation. When the energy compensation instruction is to execute energy compensation, a voltage control instruction is output based on the change in the output voltage amplitude of the distributed photovoltaic system according to a set voltage stabilization algorithm. And / or, based on a set energy consumption planning algorithm, an optimal energy consumption scheme for the load side is determined based on power supply side output data, load side energy consumption data, the output voltage amplitude of the distributed photovoltaic system, and harmonic power. When the energy cost determined by the optimal energy consumption scheme is not greater than a set energy cost threshold, an energy consumption control instruction is output according to the optimal energy consumption scheme.

[0066] Trigger circuit 122 is used to open and close the circuit according to the power compensation command. When the power compensation command is to execute power compensation, the trigger circuit is open, and when the power compensation command is to end power compensation, the trigger circuit is closed.

[0067] The first control circuit 123 is used to perform I / O control according to voltage control command and power control command when the trigger circuit is turned on, and generate I / O control signal.

[0068] The second control circuit 124 is used to switch capacitive electronic devices on and off according to the I / O control signal, generate a capacitor parameter adjustment signal, and transmit it to the distributed photovoltaic system.

[0069] Preferably, the first control circuit is a three-phase bridge fully controlled rectifier bridge.

[0070] In one embodiment, the algorithm processing unit is a CPU, on which voltage stabilization algorithms and energy planning algorithms, pre-determined through modeling using a large amount of historical data, are programmed. The energy planning algorithm can provide different algorithms and generate different energy planning schemes depending on the energy planning scenario. For example, for enterprises, residents, and factories targeting distributed photovoltaic (PV) systems, three energy planning schemes can be formulated based on their respective PV output and load curves. After the data measurement module transmits the collected data to the CPU, when the CPU determines that the energy consumption data meets the safety constraints, it generates an instruction to execute energy compensation, triggering the circuit by switching on the thyristor. When the energy consumption data does not meet the safety constraints, it generates an instruction to end energy compensation, triggering the circuit by switching off the thyristor, and the energy compensation module outputs an instruction to perform energy compensation on the distributed PV system. The safety constraints include whether the load-side power exceeds the power limits of the electricity consumption side and the distributed PV system, whether the load-side voltage amplitude exceeds the voltage amplitude limits of the electricity consumption side and the distributed PV system, and whether the load-side harmonic power exceeds the harmonic power limits of the distributed PV system, etc. Simultaneously, the CPU outputs voltage control commands based on the changes in the output voltage amplitude of the distributed photovoltaic system according to the set voltage stabilization algorithm, and / or determines the optimal energy consumption scheme for the load side based on the power supply side output data, load side energy consumption data, the output voltage amplitude of the distributed photovoltaic system, and harmonic power according to the set energy consumption planning algorithm. When the electricity cost determined by the optimal energy consumption scheme is not greater than the set electricity cost threshold, the CPU outputs energy consumption control commands according to the optimal energy consumption scheme. Since the trigger circuit is open, the voltage control commands and energy consumption control commands are transmitted to the first control circuit. The first control circuit performs I / O control based on the voltage control commands and energy consumption control commands, generating I / O control signals. The second control circuit, electrically connected to the first control circuit, switches capacitive electronic devices on and off according to the I / O control signals, generating capacitor parameter adjustment signals, which are transmitted to the distributed photovoltaic system, thereby realizing the power output of the distributed photovoltaic system. When the electricity cost determined by the optimal energy consumption scheme is greater than the set electricity cost threshold, the power supply side and the distributed photovoltaic system continue to supply power to the load side according to the original output scheme. In this case, only voltage output stability control of the distributed photovoltaic system is required.

[0071] In another embodiment, a wide-area digital metering platform can be established at the remote end of the distributed photovoltaic power compensation device to aggregate the collected data.

[0072] The publicly available photovoltaic power compensation device described in this preferred embodiment acquires the measurement indicators of distributed photovoltaic systems, achieving a measurement accuracy of 0.2S for power frequency signals and a frequency analysis range to the 2nd-50th harmonics. It can provide energy planning solutions for various scenarios such as enterprises, residents, and factories with distributed photovoltaic systems, and achieve distributed photovoltaic voltage compensation, with voltage amplitude compensation to ±5% of the rated voltage of the distribution area. Therefore, unlike previous energy compensation methods using inverters and other equipment, the publicly available photovoltaic power compensation device described in this preferred embodiment forms a compensation loop based on precise metering data and achieves high-precision metering of electrical energy, including DC and harmonic characteristics, based on digital metering technology; it also optimizes low power quality by controlling the capacitor using thyristor technology.

[0073] Exemplary methods

[0074] Figure 5 This is a schematic flowchart of a distributed photovoltaic power compensation method according to a preferred embodiment of the present invention. Figure 5 As shown, the distributed photovoltaic power compensation method described in this preferred embodiment starts from step 501.

[0075] In step 501, the output voltage amplitude and harmonic power of the distributed photovoltaic system, the load-side energy consumption data, and the power supply-side output data are obtained respectively.

[0076] In step 502, an energy compensation instruction is generated based on the energy consumption data and the set safety constraints. When the energy consumption data meets the safety constraints, the energy compensation instruction is to execute energy compensation; when the energy consumption data does not meet the safety constraints, the energy compensation instruction is to end energy compensation.

[0077] In step 503, when the power compensation command is to execute power compensation, a voltage control command is output based on the change in the output voltage amplitude of the distributed photovoltaic system according to the set voltage stabilization algorithm.

[0078] In step 504, based on the set energy planning algorithm, the optimal energy consumption scheme for load side electricity costs is determined based on the power supply side output data, load side energy consumption data, output voltage amplitude and harmonic power of distributed photovoltaic power generation.

[0079] In step 505, when the electricity cost determined by the optimal energy consumption scheme is not greater than the set electricity cost threshold, an energy consumption control command is output according to the optimal energy consumption scheme.

[0080] In step 506, a control signal is generated based on the voltage control command and energy consumption control command and transmitted to the distributed photovoltaic system.

[0081] Preferably, the data obtained include the output voltage amplitude and harmonic power of the distributed photovoltaic system, load-side energy consumption data, and power supply-side output data.

[0082] The analog voltage / current waveforms are sampled according to the set sampling rate to generate distributed photovoltaic sampling signals, load-side sampling signals, and power supply-side sampling signals.

[0083] Based on the Fast Fourier Transform (FFT) algorithm, we perform spectral analysis of distributed photovoltaic power generation on the sampled signals of distributed photovoltaic systems, calculate load-side energy consumption data based on the sampled signals of the load side, and calculate power output data based on the sampled signals of the power supply side.

[0084] The system outputs the distributed photovoltaic system's output voltage amplitude and harmonic power, load-side energy consumption data, and power supply-side output data at the set frequency.

[0085] Preferably, after generating the power compensation command based on the energy consumption data and the set safety constraints, the method further includes:

[0086] The circuit is switched on and off according to the power compensation command. When the power compensation command is to execute power compensation, the circuit is triggered to open. When the power compensation command is to end power compensation, the circuit is triggered to close.

[0087] Optionally, generating control signals based on the voltage control commands and energy consumption control commands and transmitting them to the distributed photovoltaic system includes:

[0088] When the trigger circuit is turned on, I / O control is performed according to the voltage control command and the power control command, and I / O control signals are generated.

[0089] The capacitor electronic device is switched on and off according to the I / O control signal, and a capacitor parameter adjustment signal is generated.

[0090] Exemplary electronic devices

[0091] Figure 6 This is a schematic diagram of an electronic device structure according to a preferred embodiment of the present invention. The electronic device may be either or both of the first device and the second device, or a standalone device independent of them. The standalone device may communicate with the first device and the second device to receive the collected input signals from them. Figure 6 A block diagram of an electronic device according to an embodiment of the present disclosure is shown. Figure 6 As shown, the electronic device includes one or more processors 601 and memory 602.

[0092] The processor 601 may be a central processing unit (CPU) or other form of processing unit with data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device to perform desired functions.

[0093] The memory 602 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory. The non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 601 may execute the program instructions to implement the distributed photovoltaic power compensation method of the software program disclosed in the various embodiments above, and / or other desired functions. In one example, the electronic device may also include an input device 603 and an output device 604, these components being interconnected via a bus system and / or other forms of connection mechanisms (not shown).

[0094] In addition, the input device 603 may also include, for example, a keyboard, a mouse, etc.

[0095] The output device 604 can output various information to the outside. The output device 604 may include, for example, a display, a speaker, a printer, and a communication network and its connected remote output devices, etc.

[0096] Of course, for the sake of simplicity, Figure 6 Only some of the components of the electronic device relevant to this disclosure are shown, omitting components such as buses, input / output interfaces, etc. In addition, the electronic device may include any other suitable components depending on the specific application.

[0097] Exemplary computer program products and computer-readable storage media

[0098] In addition to the methods and apparatus described above, embodiments of this disclosure may also be computer program products comprising computer program instructions that, when executed by a processor, cause the processor to perform the steps in the distributed photovoltaic power compensation methods according to various embodiments of this disclosure as described in the "Exemplary Methods" section of this specification.

[0099] The computer program product can be written in any combination of one or more programming languages ​​to perform the operations of the embodiments of this disclosure. The programming languages ​​include object-oriented programming languages ​​such as Java and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on a user's computing device, partially on a user's computing device, as a standalone software package, partially on a user's computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0100] Furthermore, embodiments of this disclosure may also be computer-readable storage media storing computer program instructions that, when executed by a processor, cause the processor to perform the steps in the distributed photovoltaic power compensation methods according to various embodiments of this disclosure as described in the "Exemplary Methods" section above.

[0101] The computer-readable storage medium may be any combination of one or more readable media. A readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may, for example, include, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatuses, or devices, or any combination thereof. More specific examples of readable storage media (a non-exhaustive list) include: electrical connections having one or more wires, portable disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0102] The basic principles of this disclosure have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this disclosure are merely examples and not limitations, and should not be considered as essential features of each embodiment of this disclosure. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the scope of this disclosure to the necessity of employing the aforementioned specific details for implementation.

[0103] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For system embodiments, since they largely correspond to method embodiments, the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0104] The block diagrams of devices, apparatuses, devices, and systems disclosed herein are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0105] The methods and apparatus of this disclosure may be implemented in many ways. For example, they may be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above-described order of steps for the methods is for illustrative purposes only, and the steps of the methods of this disclosure are not limited to the order specifically described above unless otherwise specifically stated. Furthermore, in some embodiments, this disclosure may also be implemented as a program recorded on a recording medium, the program including machine-readable instructions for implementing the methods according to this disclosure. Thus, this disclosure also covers recording media storing programs for performing the methods according to this disclosure.

[0106] It should also be noted that in the apparatus, devices, and methods of this disclosure, the components or steps are decomposable and / or recombinable. Such decomposition and / or recombination should be considered equivalent to the present disclosure. The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this disclosure. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this disclosure. Therefore, this disclosure is not intended to be limited to the aspects shown herein, but rather to be carried out within the widest scope consistent with the principles and novel features disclosed herein.

[0107] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this disclosure to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A distributed photovoltaic power compensation device, characterized in that, The device includes: Multiple data measurement modules are used to acquire the output voltage amplitude and harmonic power of distributed photovoltaic systems, energy consumption data on the load side, and power output data on the power supply side, respectively. The data measurement modules include: The data acquisition unit is used to sample analog voltage / current waveforms according to the set sampling rate, and generate distributed photovoltaic sampling signals, load-side sampling signals and power supply-side sampling signals; The signal processing unit is used to perform spectrum analysis of distributed photovoltaic power on the sampled signals of distributed photovoltaic power based on the Fast Fourier Transform (FFT) algorithm, and to calculate the load-side energy consumption data and the power supply output data based on the sampled signals of the power supply side. The signal output unit is used to output the output voltage amplitude and harmonic power of the distributed photovoltaic system, load-side energy consumption data, and power supply-side output data according to the set frequency. The power compensation module is used to generate power compensation instructions based on the energy consumption data and set safety constraints. The safety constraints include whether the load-side power exceeds the power limits of the power consumption side and distributed photovoltaic (PV) power, whether the load-side voltage amplitude exceeds the voltage amplitude limits of the power consumption side and distributed PV power, and whether the load-side harmonic power exceeds the harmonic power limits of the distributed PV power. When the energy consumption data meets the safety constraints, the power compensation instruction is to execute power compensation; when the energy consumption data does not meet the safety constraints, the power compensation instruction is to terminate power compensation. When performing power compensation, the system outputs a voltage control command based on the change in the output voltage amplitude of the distributed photovoltaic system according to the set voltage stabilization algorithm; and / or determines the optimal energy consumption scheme for the load side based on the power supply side output data, load side energy consumption data, the output voltage amplitude and harmonic power of the distributed photovoltaic system according to the set energy consumption planning algorithm. When the energy cost determined by the optimal energy consumption scheme is not greater than the set energy cost threshold, the system outputs an energy consumption control command according to the optimal energy consumption scheme; and generates a control signal based on the voltage control command and the energy consumption control command and transmits it to the distributed photovoltaic system.

2. The apparatus according to claim 1, characterized in that, The device also includes a communication module for transmitting data between the data measurement module and the power compensation module.

3. The apparatus according to claim 1, characterized in that, The power compensation module includes: The algorithm processing unit is configured to generate an energy compensation instruction based on the energy consumption data and set safety constraints. When the energy consumption data meets the safety constraints, the energy compensation instruction is to execute energy compensation; when the energy consumption data does not meet the safety constraints, the energy compensation instruction is to terminate energy compensation. When the energy compensation instruction is to execute energy compensation, a voltage control instruction is output based on the change in the output voltage amplitude of the distributed photovoltaic system according to a set voltage stabilization algorithm. And / or, based on a set energy consumption planning algorithm, an optimal energy consumption scheme for the load side is determined based on power supply side output data, load side energy consumption data, the output voltage amplitude of the distributed photovoltaic system, and harmonic power. When the electricity cost determined by the optimal energy consumption scheme is not greater than a set electricity cost threshold, an energy consumption control instruction is output according to the optimal energy consumption scheme. The trigger circuit is used to open and close the circuit according to the power compensation command. When the power compensation command is to execute power compensation, the trigger circuit is open; when the power compensation command is to end power compensation, the trigger circuit is closed. The first control circuit is used to perform I / O control according to voltage control command and power control command when the trigger circuit is turned on, and generate I / O control signal. The second control circuit is used to switch capacitive electronic devices on and off according to the I / O control signal, generate a capacitor parameter adjustment signal, and transmit it to the distributed photovoltaic system.

4. The apparatus according to claim 3, characterized in that, The first control circuit is a three-phase bridge fully controlled rectifier bridge.

5. A method for distributed photovoltaic power compensation, characterized in that, The method includes: The output voltage amplitude and harmonic power of the distributed photovoltaic system, load-side energy consumption data, and power supply-side output data are obtained respectively, including: The analog voltage / current waveforms are sampled according to the set sampling rate to generate distributed photovoltaic sampling signals, load-side sampling signals, and power supply-side sampling signals. Based on the Fast Fourier Transform (FFT) algorithm, we perform spectral analysis of distributed photovoltaic power generation on the sampled signals of distributed photovoltaic systems, calculate load-side energy consumption data based on the sampled signals of the load side, and calculate power output data based on the sampled signals of the power supply side. The distributed photovoltaic system outputs the output voltage amplitude and harmonic power, load-side energy consumption data, and power supply-side output data according to the set frequency. Based on the energy consumption data and the set safety constraints, an energy compensation command is generated. The safety constraints include whether the load-side power exceeds the power limits of the electricity consumption side and the distributed photovoltaic system, whether the load-side voltage amplitude exceeds the voltage amplitude limits of the electricity consumption side and the distributed photovoltaic system, and whether the load-side harmonic power exceeds the harmonic power limits of the distributed photovoltaic system. When the energy consumption data meets the safety constraints, the energy compensation command is to execute energy compensation; when the energy consumption data does not meet the safety constraints, the energy compensation command is to terminate energy compensation. When the power compensation command is to execute power compensation, the voltage control command is output based on the change in the output voltage amplitude of the distributed photovoltaic system according to the set voltage stabilization algorithm; and / or the optimal energy consumption scheme for the load side is determined based on the power supply side output data, load side energy consumption data, output voltage amplitude and harmonic power of the distributed photovoltaic system according to the set energy consumption planning algorithm. When the electricity cost determined by the optimal energy consumption scheme is not greater than the set electricity cost threshold, an energy consumption control command is output according to the optimal energy consumption scheme. Control signals are generated based on the voltage control command and energy consumption control command and transmitted to the distributed photovoltaic system.

6. The method according to claim 5, characterized in that, After generating the power compensation command based on the energy consumption data and the set safety constraints, the command further includes: The circuit is switched on and off according to the power compensation command. When the power compensation command is to execute power compensation, the circuit is triggered to open. When the power compensation command is to end power compensation, the circuit is triggered to close.

7. The method according to claim 6, characterized in that, Generating control signals based on the voltage control commands and energy consumption control commands and transmitting them to distributed photovoltaic systems includes: When the trigger circuit is turned on, I / O control is performed according to the voltage control command and the power control command, and I / O control signals are generated. The capacitor electronic device is switched on and off according to the I / O control signal, and a capacitor parameter adjustment signal is generated.

8. A computer-readable storage medium, characterized in that, The storage medium stores a computer program for performing the method described in any one of claims 5-7.

9. An electronic device, characterized in that, The electronic device includes: processor; Memory used to store the processor's executable instructions; The processor is configured to read the executable instructions from the memory and execute the instructions to implement the method described in any one of claims 5-7.

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