Voltage compensation method and voltage compensation device

Abstract

The invention provides a voltage compensation method and a voltage compensation device, and relates to the technical field of voltage compensation, and the method comprises the following steps: S1, real-time voltage detection: carrying out the real-time collection of a target voltage through a high-precision voltage sensor, obtaining a real-time voltage value Ureal of the target voltage, and transmitting the real-time voltage value to a control unit; s2, reference voltage setting: a reference voltage value Uref is preset in a control unit, the reference voltage value is set according to standard voltage required by normal operation of target equipment or a system, high-precision compensation is realized, voltage fluctuation can be accurately detected through a high-precision voltage sensor and accurate voltage difference calculation, and the voltage fluctuation can be accurately detected through the high-precision voltage sensor and accurate voltage difference calculation. And accurate compensation is carried out according to actual requirements, the compensation accuracy can be within + / -0.5%, and the stability of the voltage is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of voltage compensation, and in particular to a voltage compensation method and a voltage compensation device. Background Art

[0002] In the operation of power systems and various electronic devices, voltage stability is a key factor in ensuring the normal operation of equipment and the reliable operation of the system. However, in practical applications, voltage fluctuations are common due to the influence of various factors. For example, when the load in the power system undergoes a sudden change, such as the start or stop of a large motor, the system current will change instantly, which in turn causes large voltage fluctuations. The presence of line impedance can also cause voltage drops during transmission, especially in the case of long-distance transmission or aging lines. Existing voltage compensation technologies, such as capacitor compensation and inductor compensation, can regulate voltage to a certain extent, but they suffer from problems such as low compensation accuracy and slow response speed, making it difficult to meet the strict voltage stability requirements of modern high-precision electronic equipment and complex power systems. Summary of the Invention

[0003] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a voltage compensation method and a voltage compensation device.

[0004] In order to achieve the above object, the present invention adopts the following technical solution: a voltage compensation method and a voltage compensation device, comprising the following steps:

[0005] S1: Real-time voltage detection: Use high-precision voltage sensors to collect target voltage in real time and obtain the real-time voltage value U of the target voltage. real and transmit the real-time voltage value to the control unit;

[0006] S2: Reference voltage setting: pre-set the reference voltage value U in the control unit ref , the reference voltage value is set according to the standard voltage required for the normal operation of the target device or system;

[0007] S3: Voltage difference calculation: The control unit calculates the real-time voltage value U real With reference voltage value U ref Compare and calculate the voltage difference. The calculation formula is ΔU=U ref -U real ;

[0008] S4: Determine compensation strategy: Based on the magnitude and polarity of the calculated voltage difference ΔU, the control unit determines a corresponding compensation strategy;

[0009] S5: Compensation effect feedback and adjustment: After the compensation operation, the voltage sensor continues to collect the target voltage in real time, transmits the new real-time voltage value to the control unit, and the control unit calculates the new voltage difference again and determines the compensation effect based on the new voltage difference.

[0010] A voltage compensation device, used to implement the above-mentioned voltage compensation method, comprising:

[0011] Voltage detection module: includes a high-precision voltage sensor, which is used to collect the real-time voltage value of the target voltage in real time, and convert the real-time voltage value into an electrical signal and transmit it to the control unit;

[0012] Control unit: uses a high-performance microprocessor, such as an ARM series microprocessor, to receive the real-time voltage value transmitted by the voltage detection module, store the reference voltage value, calculate the voltage difference, determine the compensation strategy, and control the operation of the voltage compensation module according to the compensation strategy. The control unit also includes a data processing module and a logic judgment module. The data processing module is used to calculate and process the real-time voltage value and the reference voltage value, and the logic judgment module is used to determine whether compensation is required and what compensation strategy to adopt based on the calculation results;

[0013] Voltage compensation module: includes a boost module and a buck module. The boost module adopts a boost circuit based on switching power supply technology, including inductors, switches, diodes and capacitors. By controlling the on and off time of the switch, the energy storage and release of the inductor are adjusted to achieve voltage increase. The buck module adopts a buck circuit based on linear voltage regulation technology or switching power supply technology. The linear voltage regulation circuit achieves voltage reduction by adjusting the voltage drop of the adjustment tube, and the switching power supply buck circuit achieves voltage reduction by adjusting the duty cycle of the switch tube. The boost module and buck module are respectively connected to the control unit and perform boost or buck operations according to the instructions of the control unit.

[0014] Communication module: RS-485 communication interface or wireless communication module is used to realize data transmission and communication between the voltage compensation device and external equipment or monitoring system, so as to facilitate users to remotely monitor the device and set parameters;

[0015] Power supply module: provides stable working power for each module in the voltage compensation device. It adopts isolated power supply module, which has the advantages of strong anti-interference ability and good stability, ensuring the reliable operation of the device.

[0016] Furthermore, the high-precision voltage sensor in S1 adopts a Hall voltage sensor, which has the advantages of high precision, good isolation performance, fast response speed, etc., and can accurately collect voltage signals.

[0017] Furthermore, in S4, when ΔU>0, it indicates that the real-time voltage value is lower than the reference voltage value and voltage boost compensation is required; when ΔU<0, it indicates that the real-time voltage value is higher than the reference voltage value and voltage reduction compensation is required.

[0018] Furthermore, in S5, if the compensated voltage difference still does not fall within the allowable range, the control unit further adjusts the operating parameters of the boost module or the buck module according to the new voltage difference until the target voltage is stabilized within the allowable error range.

[0019] Furthermore, the wireless communication module is a Bluetooth or Wi-Fi module.

[0020] Furthermore, the specific strategy for voltage reduction compensation is: if |ΔU|≤U min (U min is a preset minimum compensation threshold), the control unit determines that the current voltage fluctuation is within the allowable range and does not perform compensation operation;

[0021] If |ΔU|>U min When ΔU>0, the control unit controls the boost module in the voltage compensation device to increase the output voltage. The boost module adopts a boost circuit based on switching power supply technology and increases the output voltage by adjusting the duty cycle of the switching tube. When ΔU<0, the control unit controls the buck module in the voltage compensation device to reduce the output voltage. The buck module adopts a buck circuit based on linear voltage regulation technology or switching power supply technology, and the appropriate buck method is selected according to actual needs.

[0022] Compared with the prior art, the advantages and positive effects of the present invention are:

[0023] 1. High-precision compensation: Through high-precision voltage sensors and precise voltage difference calculation, it can accurately detect voltage fluctuations and perform precise compensation according to actual needs. The compensation accuracy can reach within ±0.5%, effectively improving voltage stability.

[0024] 2. Fast response: Using a high-performance microprocessor as the control unit, combined with a fast-response voltage compensation module, it can react to and compensate for voltage fluctuations in a very short time (response time is less than 10ms), meeting the fast response requirements of modern high-precision electronic equipment and complex power systems.

[0025] 3. Strong flexibility: The compensation strategy of the voltage compensation device can be dynamically adjusted according to the actual voltage difference, and remote monitoring and parameter setting can be achieved through the communication module, which can adapt to different application scenarios and user needs.

[0026] 4. High reliability: Each module adopts mature technology and high-quality components, and the power module adopts an isolated design, which improves the anti-interference ability and stability of the device and ensures the reliable operation of the voltage compensation device in various harsh environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The present invention provides a flow chart of a voltage compensation method and a voltage compensation device. DETAILED DESCRIPTION

[0028] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0029] In the description of the present invention, it should be understood that the terms "length," "width," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," and the like, indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, in the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.

[0030] See also Figure 1 The present invention provides a voltage compensation method, comprising the following steps:

[0031] S1: Real-time voltage detection: Use high-precision voltage sensors to collect target voltage in real time and obtain the real-time voltage value U of the target voltage. real and transmit the real-time voltage value to the control unit;

[0032] S2: Reference voltage setting: pre-set the reference voltage value U in the control unit ref , the reference voltage value is set according to the standard voltage required for the normal operation of the target device or system;

[0033] S3: Voltage difference calculation: The control unit calculates the real-time voltage value U real With reference voltage value U ref Compare and calculate the voltage difference. The calculation formula is ΔU=U ref -U real ;

[0034] S4: Determine compensation strategy: Based on the magnitude and polarity of the calculated voltage difference ΔU, the control unit determines a corresponding compensation strategy;

[0035] S5: Compensation effect feedback and adjustment: After the compensation operation, the voltage sensor continues to collect the target voltage in real time and transmits the new real-time voltage value to the control unit. The control unit calculates the new voltage difference again and determines the compensation effect based on the new voltage difference.

[0036] The high-precision voltage sensor in S1 adopts a Hall voltage sensor, which has the advantages of high precision, good isolation performance, fast response speed, etc., and can accurately collect voltage signals;

[0037] In the above S4, when ΔU>0, it indicates that the real-time voltage value is lower than the reference voltage value and a voltage boost compensation is required; when ΔU<0, it indicates that the real-time voltage value is higher than the reference voltage value and a voltage drop compensation is required;

[0038] The specific strategy for voltage reduction compensation is: if |ΔU|≤U min (U min is a preset minimum compensation threshold), the control unit determines that the current voltage fluctuation is within the allowable range and does not perform compensation operation;

[0039] If |ΔU|>U min When ΔU>0, the control unit controls the boost module in the voltage compensation device to increase the output voltage. The boost module adopts a boost circuit based on switching power supply technology and increases the output voltage by adjusting the duty cycle of the switch tube. When ΔU<0, the control unit controls the buck module in the voltage compensation device to reduce the output voltage. The buck module adopts a buck circuit based on linear voltage regulation technology or switching power supply technology. The appropriate buck method is selected according to actual needs.

[0040] In S5, if the compensated voltage difference still does not fall within the allowable range, the control unit further adjusts the operating parameters of the boost module or the buck module according to the new voltage difference until the target voltage stabilizes within the allowable error range;

[0041] A voltage compensation device, used to implement the above-mentioned voltage compensation method, comprising:

[0042] Voltage detection module: includes a high-precision voltage sensor, which is used to collect the real-time voltage value of the target voltage in real time, and convert the real-time voltage value into an electrical signal and transmit it to the control unit;

[0043] Control unit: uses a high-performance microprocessor, such as an ARM series microprocessor, to receive the real-time voltage value transmitted by the voltage detection module, store the reference voltage value, calculate the voltage difference, determine the compensation strategy, and control the operation of the voltage compensation module according to the compensation strategy. The control unit also includes a data processing module and a logic judgment module. The data processing module is used to calculate and process the real-time voltage value and the reference voltage value, and the logic judgment module is used to determine whether compensation is required and what compensation strategy to adopt based on the calculation results;

[0044] Voltage compensation module: includes a boost module and a buck module. The boost module adopts a boost circuit based on switching power supply technology, including inductors, switches, diodes and capacitors. By controlling the on and off time of the switch, the energy storage and release of the inductor are adjusted to achieve voltage increase. The buck module adopts a buck circuit based on linear voltage regulation technology or switching power supply technology. The linear voltage regulation circuit achieves voltage reduction by adjusting the voltage drop of the adjustment tube, and the switching power supply buck circuit achieves voltage reduction by adjusting the duty cycle of the switch tube. The boost module and buck module are respectively connected to the control unit and perform boost or buck operations according to the instructions of the control unit.

[0045] Communication module: adopts RS-485 communication interface or wireless communication module, the wireless communication module is Bluetooth or Wi-Fi module, which is used to realize data transmission and communication between the voltage compensation device and external equipment or monitoring system, so as to facilitate users to remotely monitor the device and set parameters;

[0046] Power supply module: provides stable working power for each module in the voltage compensation device. It adopts isolated power supply module, which has the advantages of strong anti-interference ability and good stability, ensuring the reliable operation of the device.

[0047] In an industrial power system, set the reference voltage value U ref is 380V, the minimum compensation threshold U min

[0048] When the high-precision voltage sensor detects the real-time voltage value U real When it is 370V, the control unit calculates the voltage difference ΔU=U ref -U real =380-370=10V, since ΔU>0 and |ΔU|>U min The control unit determines that boost compensation is required. The control unit sends a command to the boost module in the voltage compensation module. The boost module gradually increases the output voltage by adjusting the duty cycle of the switch tube. During the compensation process, the voltage sensor continuously collects the target voltage. When it detects that the voltage value is stable in the range of 379V-381V, the control unit considers that the compensation has met the requirements and stops further compensation operations.

[0049] In a laboratory electronic equipment power supply system, the reference voltage value U ref Set to 220V, minimum compensation threshold U min When the voltage sensor detects the real-time voltage value U real When it is 228V, the voltage difference ΔU=U ref -U real =220-228=-8V, because ΔU<0 and |ΔU|>U min The control unit controls the step-down module to perform the voltage reduction operation. The step-down module uses a step-down circuit based on switching power supply technology, which reduces the output voltage by adjusting the duty cycle of the switching transistor. After multiple adjustments, compensation is complete when the target voltage stabilizes within the range of 217V-223V.

[0050] It can be seen from the above embodiments that the voltage compensation method and voltage compensation device of the present invention can effectively compensate for voltage fluctuations, improve voltage stability, and meet the needs of different application scenarios.

[0051] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any other form. Any person skilled in the art may use the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiments made in accordance with the technical essence of the present invention without departing from the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A voltage compensation method, characterized in that: The following steps are involved: S1: Real-time voltage detection: Use high-precision voltage sensors to collect target voltage in real time and obtain the real-time voltage value U of the target voltage. real and transmit the real-time voltage value to the control unit; S2: Reference voltage setting: pre-set the reference voltage value U in the control unit ref ,The reference voltage value is set according to the standard voltage required for the normal operation of the target device or system; S3: Voltage difference calculation: The control unit calculates the real-time voltage value U real With reference voltage value U ref Compare and calculate the voltage difference. The calculation formula is ΔU=U real -U real ; S4: Determine compensation strategy: Based on the magnitude and polarity of the calculated voltage difference ΔU, the control unit determines a corresponding compensation strategy; S5: Compensation effect feedback and adjustment: After the compensation operation, the voltage sensor continues to collect the target voltage in real time, transmits the new real-time voltage value to the control unit, and the control unit calculates the new voltage difference again and determines the compensation effect based on the new voltage difference.

2. A voltage compensation device, used to implement the above voltage compensation method, characterized in that: include: Voltage detection module: includes a high-precision voltage sensor, which is used to collect the real-time voltage value of the target voltage in real time, and convert the real-time voltage value into an electrical signal and transmit it to the control unit; Control unit: uses a high-performance microprocessor, such as an ARM series microprocessor, to receive the real-time voltage value transmitted by the voltage detection module, store the reference voltage value, calculate the voltage difference, determine the compensation strategy, and control the operation of the voltage compensation module according to the compensation strategy. The control unit also includes a data processing module and a logic judgment module. The data processing module is used to calculate and process the real-time voltage value and the reference voltage value, and the logic judgment module is used to determine whether compensation is required and what compensation strategy to adopt based on the calculation results; Voltage compensation module: includes a boost module and a buck module. The boost module adopts a boost circuit based on switching power supply technology, including inductors, switches, diodes and capacitors. By controlling the on and off time of the switch, the energy storage and release of the inductor are adjusted to achieve voltage increase. The buck module adopts a buck circuit based on linear voltage regulation technology or switching power supply technology. The linear voltage regulation circuit achieves voltage reduction by adjusting the voltage drop of the adjustment tube, and the switching power supply buck circuit achieves voltage reduction by adjusting the duty cycle of the switch tube. The boost module and buck module are respectively connected to the control unit and perform boost or buck operations according to the instructions of the control unit. Communication module: RS-485 communication interface or wireless communication module is used to realize data transmission and communication between the voltage compensation device and external equipment or monitoring system, so as to facilitate users to remotely monitor the device and set parameters; Power supply module: provides stable working power for each module in the voltage compensation device. It adopts isolated power supply module, which has the advantages of strong anti-interference ability and good stability, ensuring the reliable operation of the device.

3. The voltage compensation method according to claim 1, wherein: The high-precision voltage sensor in S1 adopts a Hall voltage sensor, which has the advantages of high precision, good isolation performance, fast response speed, etc., and can accurately collect voltage signals.

4. The voltage compensation method according to claim 1, wherein: In S4, when ΔU>0, it indicates that the real-time voltage value is lower than the reference voltage value and voltage boost compensation is required; when ΔU<0, it indicates that the real-time voltage value is higher than the reference voltage value and voltage reduction compensation is required.

5. The voltage compensation method according to claim 1, wherein: In S5, if the compensated voltage difference still does not fall within the allowable range, the control unit further adjusts the operating parameters of the boost module or the buck module according to the new voltage difference until the target voltage is stabilized within the allowable error range.

6. The voltage compensation device according to claim 2, characterized in that: The wireless communication module is a Bluetooth or Wi-Fi module.

7. The voltage compensation method according to claim 4, wherein: The specific strategy for voltage reduction compensation is: if |ΔU|≤U min (U min is a preset minimum compensation threshold), the control unit determines that the current voltage fluctuation is within the allowable range and does not perform compensation operation; If |ΔU|>U min When ΔU>0, the control unit controls the boost module in the voltage compensation device to increase the output voltage. The boost module adopts a boost circuit based on switching power supply technology and increases the output voltage by adjusting the duty cycle of the switching tube. When ΔU<0, the control unit controls the buck module in the voltage compensation device to reduce the output voltage. The buck module adopts a buck circuit based on linear voltage regulation technology or switching power supply technology, and the appropriate buck method is selected according to actual needs.

Images