Pressure regulating method and equipment based on bypass dynamic pressure regulating device

Abstract

The invention discloses a voltage regulation method and equipment based on a bypass dynamic voltage regulation device, and relates to the technical field of power grid voltage regulation, and the method comprises the steps: obtaining a current direction and a voltage value of a current power grid from a power grid data end through a control module, generating a control instruction according to the current direction and the voltage value of the current power grid and a preset control strategy, and the voltage regulating module and the bypass module are controlled to dynamically regulate the voltage of the power grid based on the control instruction. Power grid parameters are monitored in real time through the control module, and the voltage regulation module and the bypass module are dynamically controlled based on a preset strategy, so that dynamic cooperative regulation of high and low voltage problems of a photovoltaic power grid is realized, automatic voltage reduction can be realized when the power grid voltage exceeds a threshold value in the daytime, intelligent voltage boosting can be realized when the power grid voltage is lower than the threshold value at night, and on-demand dynamic voltage regulation is realized; the adjusting efficiency and the application range of the power grid are improved; and when the photovoltaic power grid is over-matched in power generation, the capacity requirement of equipment can be reduced by utilizing intelligent adjustment of the small-capacity voltage regulating module, and the equipment cost is saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power grid voltage regulation, in particular to a voltage regulation method and device based on a bypass dynamic voltage regulation device. BACKGROUND

[0002] After a photovoltaic power grid is connected to a line, the line voltage will rise during the day due to reverse power transmission, and the voltage will drop significantly at night or when there is insufficient light. Existing power grid voltage regulation usually reduces the voltage of the entire line through large voltage regulation devices to deal with the high voltage problem during the day, resulting in excessively low voltage at night.

[0003] The existing voltage regulation technology cannot achieve dynamic regulation of high and low voltages, cannot regulate voltage on demand, has low regulation efficiency, and requires high-cost voltage regulation devices. SUMMARY

[0004] The purpose of the present application is to provide a voltage regulation method and device based on a bypass dynamic voltage regulation device, which can achieve dynamic coordinated regulation of high and low voltages of a photovoltaic power grid, improve the regulation efficiency and application range of the power grid, and reduce the cost of voltage regulation devices.

[0005] To achieve the above purpose, the present application provides the following solutions: In a first aspect, the present application provides a voltage regulation method based on a bypass dynamic voltage regulation device, the bypass dynamic voltage regulation device comprising a voltage regulation module, a bypass module, and a control module; one end of the voltage regulation module and one end of the bypass module are connected to a power grid power supply end; the other end of the voltage regulation module and the other end of the bypass module are connected to a power generation power supply end; the control module is connected to a control end of the voltage regulation module, a control end of the bypass module, and a power grid data end, respectively; the voltage regulation method based on the bypass dynamic voltage regulation device comprises: obtaining the current direction and voltage value of the power grid from the power grid data end through the control module, generating a control instruction according to the current direction and voltage value of the power grid according to a preset control strategy, and controlling the voltage regulation module and the bypass module to dynamically regulate the power grid based on the control instruction.

[0006] In a second aspect, the present application provides a computer device, comprising a memory and a processor to store a computer program on the memory and run the computer program on the processor, and the processor executes the computer program to implement the voltage regulation method based on the bypass dynamic voltage regulation device described above.

[0007] According to the specific embodiments provided by the present application, the following technical effects are disclosed: This application obtains the current direction and voltage value of the power grid from the power grid data terminal through a control module. Based on the current direction and voltage value of the power grid, it generates control commands according to a preset control strategy, and controls the voltage regulation module and bypass module to dynamically regulate the voltage of the power grid based on the control commands. This application achieves dynamic and coordinated regulation of high and low voltage issues in the photovoltaic power grid by monitoring power grid parameters in real time through the control module and dynamically controlling the voltage regulation module and bypass module based on a preset strategy. It can automatically reduce the voltage when the power grid voltage exceeds the threshold during the day and intelligently increase the voltage when the power grid voltage is below the threshold at night, realizing on-demand dynamic voltage regulation, improving the regulation efficiency and application scope of the power grid; and when the photovoltaic power grid generates excess power, the intelligent regulation using a small-capacity voltage regulation module can reduce the equipment capacity requirement and save equipment costs. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a schematic diagram of a bypass dynamic voltage regulation device provided in an embodiment of this application.

[0010] Figure 2 This is a schematic flowchart of a voltage regulation method and device based on a bypass dynamic voltage regulation device provided in an embodiment of this application.

[0011] Figure 3 This is a schematic diagram of the structure of a computer device provided in an embodiment of this application.

[0012] Figure reference numerals: voltage regulating module-1; bypass module-2 and control module-3. Detailed Implementation

[0013] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0014] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0015] Example 1, such as Figures 1-2As shown, this embodiment provides a voltage regulation method based on a bypass dynamic voltage regulation device. The bypass dynamic voltage regulation device includes: a voltage regulation module 1, a bypass module 2, and a control module 3; one end of the voltage regulation module 1 and one end of the bypass module 2 are both connected to the power grid power supply end; the other end of the voltage regulation module 1 and the other end of the bypass module 2 are both connected to the production power supply end; the control module 3 is connected to the control end of the voltage regulation module 1, the control end of the bypass module 2, and the power grid data end, respectively. The voltage regulation method based on the bypass dynamic voltage regulation device includes: S1. The current direction and voltage value of the power grid are obtained from the power grid data terminal through the control module 3. Based on the current direction and voltage value of the power grid, control commands are generated according to the preset control strategy. Based on the control commands, the voltage regulation module 1 and the bypass module 2 are controlled to dynamically regulate the voltage of the power grid.

[0016] Optionally, the power grid may include at least: a photovoltaic power grid and a wind power power grid.

[0017] Furthermore, the preset control strategy is a standard control strategy; the standard control strategy specifically includes: 1) When the current current direction is positive and the current voltage value is lower than the first voltage threshold, the voltage regulation module 1 boosts the voltage and the bypass module 2 shuts down.

[0018] 2) When the current current direction is positive and the current voltage value is higher than the second voltage threshold, the voltage regulation module 1 reduces the voltage and the bypass module 2 is turned off. The first voltage threshold is less than the second voltage threshold.

[0019] 3) When the current direction is reversed, the voltage regulation module 1 is turned off and the bypass module 2 is turned on.

[0020] Alternatively, the standard control strategy specifically includes: when the current current direction is positive and the current voltage value is lower than the first voltage threshold, the voltage regulating module 1 boosts the voltage and the bypass module 2 shuts off, while in other cases the voltage regulating module 1 and the bypass module 2 do not operate.

[0021] In practical applications, a positive current direction refers to the direction of the current input from the power grid; a negative current direction refers to the direction of the current input from the power supply end to the power grid end.

[0022] Furthermore, the preset control strategy is a voltage-reduction control strategy; the voltage-reduction control strategy is as follows: 1) When the current current direction is positive and the current voltage value is lower than the third voltage threshold, the voltage regulation module 1 boosts the voltage and the bypass module 2 shuts down.

[0023] 2) When the current current direction is positive and the current voltage value is higher than the fourth voltage threshold, the voltage regulation module 1 reduces the voltage, and the bypass module 2 is turned off. The third voltage threshold is less than the fourth voltage threshold.

[0024] 3) When the current direction is reversed, the voltage value is converted to the converted current value according to the preset coefficient, and the converted current value is added to the current current value. The current direction is re-determined, the current current direction is updated, and the process returns to "When the current current direction is positive and the current voltage value is lower than the third voltage threshold, the voltage regulation module 1 is turned off and the bypass module 2 is turned off".

[0025] Optionally, the first threshold is 93% of the standard voltage, the second threshold is 107% of the standard voltage, and the standard voltage is 230V.

[0026] Optionally, the preset control strategy is to alternate between the standard control strategy and the voltage conversion control strategy in different time periods.

[0027] Optionally, the preset control strategy is to alternate between the standard control strategy and the voltage conversion control strategy depending on the scenario.

[0028] Furthermore, the voltage regulating module 1 is any one of AC / AC, AC / DC / AC, UPQC, switching type voltage regulator and transformer-coupled type voltage regulator.

[0029] The technical effects of this application are as follows: This application monitors grid parameters in real time through a control module and dynamically controls the voltage regulation module and bypass module based on a preset strategy, realizing dynamic coordinated adjustment of high and low voltage issues in the photovoltaic grid. It can automatically reduce voltage when the grid voltage exceeds a threshold during the day and intelligently increase voltage when the grid voltage is below a threshold at night, achieving on-demand dynamic voltage regulation, improving the grid's regulation efficiency and application scope. Furthermore, when the photovoltaic grid generates power in excess, the intelligent adjustment using a small-capacity voltage regulation module can reduce equipment capacity requirements and save equipment costs.

[0030] Example 2: This application also provides a computer device, which may be a server or a terminal, and its internal structure diagram may be as follows. Figure 3 As shown, this computer device includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The database stores and processes data. The I / O interfaces are used for exchanging information between the processor and external devices. The communication interface is used for communicating with external terminals via a network connection. When the computer program is executed by the processor, it implements the aforementioned methods.

[0031] Those skilled in the art will understand that Figure 3 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0032] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments described above. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM).

[0033] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0034] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A voltage regulation method based on a bypass dynamic voltage regulating device, characterized in that, The bypass dynamic voltage regulation device includes: a voltage regulation module, a bypass module, and a control module; one end of the voltage regulation module and one end of the bypass module are both connected to the power grid power supply end; the other end of the voltage regulation module and the other end of the bypass module are both connected to the production power supply end; the control module is connected to the control terminal of the voltage regulation module, the control terminal of the bypass module, and the power grid data terminal, respectively; the voltage regulation method based on the bypass dynamic voltage regulation device includes: The control module obtains the current direction and voltage value of the current grid from the grid data terminal, generates control commands according to the current direction and voltage value of the current grid and a preset control strategy, and controls the voltage regulation module and the bypass module to dynamically regulate the voltage of the grid based on the control commands.

2. The voltage regulation method based on a bypass dynamic voltage regulating device according to claim 1, characterized in that, The preset control strategy is a standard control strategy; The standard control strategy specifically includes: When the current current direction is positive and the current voltage value is lower than the first voltage threshold, the voltage regulation module boosts the voltage and the bypass module shuts down. When the current current direction is positive and the current voltage value is higher than the second voltage threshold, the voltage regulation module reduces the voltage and the bypass module is turned off; the first voltage threshold is less than the second voltage threshold. When the current direction is reversed, the voltage regulation module is turned off and the bypass module is turned on. Alternatively, the standard control strategy specifically includes: when the current current direction is positive and the current voltage value is lower than the first voltage threshold, the voltage regulation module boosts the voltage and the bypass module shuts off; otherwise, the voltage regulation module and the bypass module do not operate.

3. The voltage regulation method based on a bypass dynamic voltage regulating device according to claim 1, characterized in that, The preset control strategy is a voltage conversion control strategy; The voltage conversion control strategy is as follows: When the current current direction is positive and the current voltage value is lower than the third voltage threshold, the voltage regulation module boosts the voltage and the bypass module shuts off. When the current current direction is positive and the current voltage value is higher than the fourth voltage threshold, the voltage regulation module reduces the voltage and the bypass module is turned off; the third voltage threshold is less than the fourth voltage threshold. When the current direction is reversed, the voltage value is converted to the current value according to the preset coefficient, and the converted current value is added to the current value. The current direction is re-determined, the current direction is updated, and the process returns to "When the current current direction is positive and the current voltage value is lower than the third voltage threshold, the voltage regulation module boosts the voltage and the bypass module shuts down".

4. The voltage regulation method based on a bypass dynamic voltage regulating device according to claim 1, characterized in that, The voltage regulating module is any one of AC / AC, AC / DC / AC, UPQC, switching type voltage regulator and transformer-coupled type voltage regulator.

5. A computer device, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor executes the computer program to implement the voltage regulation method based on the bypass dynamic voltage regulation device according to any one of claims 1-4.

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