Self-adaptive droop power control system for treating low voltage at tail end of rural power grid

Abstract

The invention relates to the technical field of low-voltage droop power adjustment at the tail end of a rural power grid, and discloses a self-adaptive droop power control system for treating low voltage at the tail end of the rural power grid. According to the self-adaptive droop power control system for governing the low voltage at the tail end of the rural power grid, voltage data and current data at the tail end of the rural power grid are collected and preprocessed, an adjustment factor is calculated according to two deviation values, after the adjustment factor is generated, actual power in a collection cycle is calculated according to an actual voltage measurement value and an actual current measurement value, and the low voltage at the tail end of the rural power grid is controlled. The actual power and the adjustment factor in the collection period are combined to calculate the final adjustment power value, and the adjustment unit adjusts the droop power of the low voltage at the tail end of the rural power grid according to the final adjustment power value, so that the voltage at the tail end of the rural power grid is dynamically adjusted in real time, a static voltage adjustment mode is avoided, and the adjustment efficiency is improved. Corresponding load changes can be achieved in real time, dynamic requirements are met, the method is suitable for being used in all areas, and power quality stability is improved.

Description

Technical Field

[0001] The invention relates to the technical field of low voltage droop power adjustment at the end of a rural power grid, and in particular to an adaptive droop power control system for managing low voltage at the end of a rural power grid. Background Art

[0002] In modern agricultural production, the stability and reliability of power supply are crucial. However, due to long lines, uneven and dispersed loads, low voltage often occurs at the end of the agricultural power grid. This low voltage phenomenon not only affects the normal operation of agricultural production equipment, but may also lead to poor crop growth, equipment damage and energy waste, thus hindering the process of agricultural modernization.

[0003] Traditional voltage regulation methods, such as using transformers to adjust voltage, adjusting switchgear, or adding branch lines, often face many limitations. The limitations of these methods are mainly reflected in the following aspects: First, due to line losses, traditional voltage boosting measures have limited effect, especially in the case of high load or long-distance power supply, the voltage often cannot meet the electricity demand of agricultural production; second, traditional methods lack flexibility and cannot respond to load changes in real time. In agricultural production, due to factors such as crop growth cycles and weather changes, the load fluctuates greatly. Static voltage regulation methods are difficult to adapt to this dynamic demand, especially in remote areas, which can easily lead to unstable power quality. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides an adaptive droop power control system for managing low voltage at the end of a rural power grid. The system has the advantages of collecting voltage data and current data at the end of the rural power grid, and preprocessing the two data to make the two values ​​closer to the actual values, namely the actual voltage measurement value and the actual current measurement value, respectively calculating the voltage deviation value and the power deviation value. After the two deviation values ​​are calculated, the adjustment factor is calculated based on the two deviation values. After the adjustment factor is generated, the actual power in the collection week is calculated based on the actual voltage measurement value and the actual current measurement value. The actual power in the collection period and the adjustment factor are combined to calculate the final adjustment power value. The adjustment unit adjusts the droop power of the low voltage at the end of the rural power grid according to the final adjustment power value, thereby realizing real-time and dynamic adjustment of the voltage at the end of the rural power grid, avoiding static voltage adjustment mode, responding to load changes in real time, meeting dynamic needs, being suitable for use in various regions, improving the stability of power quality, etc., and solving the above-mentioned problems.

[0006] (II) Technical solution

[0007] To achieve the above object, the present invention provides the following technical solutions: an adaptive droop power control system for managing low voltage at the end of a rural power grid, comprising a voltage data acquisition unit, a current data acquisition unit, a power grid data processing unit and a regulation unit;

[0008] The voltage data acquisition unit is used to collect voltage data at the end of the rural power grid, and the current data acquisition unit is used to collect current data at the end of the rural power grid. The voltage data acquisition unit sends all voltage data within the same acquisition cycle to the power grid data processing unit according to the acquisition cycle, and the current data acquisition unit sends all current data within the same acquisition cycle to the power grid data processing unit according to the acquisition cycle;

[0009] The power grid data processing unit pre-processes all the voltage data and all the current data received within the collection period, respectively, and obtains the actual voltage measurement value and the actual current measurement value, respectively. After the actual voltage measurement value and the actual current measurement value are calculated, the voltage deviation value and the actual power within the collection period are calculated, respectively. The power grid data processing unit calculates the power deviation value according to the actual power within the collection period calculated, and the power grid data processing unit calculates the adjustment factor according to the power deviation value and the voltage deviation value generated by the calculation. After the adjustment factor is calculated, the power grid data processing unit calculates the final adjustment power value according to the adjustment factor and the actual power within the collection period, and sends the final adjustment power value to the adjustment unit;

[0010] After receiving the final adjustment power value, the adjustment unit controls the power at the rural power terminal according to the final adjustment power value.

[0011] Preferably, all the voltage data in the same acquisition cycle are expressed as: {V1, V2, ..., V n}, all the current data in the same acquisition cycle are expressed as: {L1, L2, ..., L n}, and the number of all voltage data and current data in the same collection period is the same, the collection interval is the same, and the collection period is the same.

[0012] Preferably, the actual voltage measurement value calculation expression is as follows:

[0013]

[0014] In the formula, SV represents the actual voltage measurement value, It means to sum all the voltage data in the same acquisition cycle. It means that the summed results are averaged and the result is the actual voltage measurement.

[0015] Preferably, the actual current measurement value calculation expression is:

[0016]

[0017] In the formula, SL represents the actual current measurement value, It means to sum all the current data in the same acquisition cycle. It means that the average value of the summed results is obtained, and the result is the actual current measurement value.

[0018] Preferably, the actual power calculation expression during the acquisition period is:

[0019] Sgl=SL*SV

[0020] In the formula, Sgl represents the actual power during the acquisition period.

[0021] Preferably, the voltage deviation value calculation expression is as follows:

[0022] VP=MV-SV

[0023] In the formula, VP represents the voltage deviation value, and MV represents the target voltage, that is, the preset voltage value. Preferably, the power deviation value calculation expression is as follows:

[0024] glP=Mg-Sgl

[0025] In the formula, glP represents the power deviation value, and Mg represents the target power, that is, the preset power value. Preferably, the adjustment factor calculation expression is as follows:

[0026] TJ=ZY V *VP+ZY g *glP

[0027] In the formula, TJ represents the adjustment factor, ZY V Indicates the set voltage gain coefficient, ZY g Indicates the set power gain coefficient.

[0028] Preferably, the final adjusted power value calculation expression is as follows:

[0029] ZZgl=Sgl+TJ

[0030] In the formula, ZZgl represents the final adjusted power value.

[0031] Preferably, after the power grid data processing unit calculates and generates a final adjustment power value, it sends it to the adjustment unit, and the adjustment unit adjusts the low voltage droop power at the end of the rural power grid according to the final adjustment power value.

[0032] Compared with the prior art, the present invention provides an adaptive droop power control system for managing low voltage at the end of the rural power grid, which has the following beneficial effects:

[0033] The present invention collects voltage data and current data at the end of the rural power grid, and pre-processes the two data to make the two values ​​closer to the actual values, namely the actual voltage measurement value and the actual current measurement value, and respectively calculates the voltage deviation value and the power deviation value. After the two deviation values ​​are calculated, the adjustment factor is calculated according to the two deviation values. After the adjustment factor is generated, the actual power in the collection week is calculated according to the actual voltage measurement value and the actual current measurement value, and the actual power in the collection period and the adjustment factor are combined to calculate the final adjustment power value. The adjustment unit adjusts the droop power of the low voltage at the end of the rural power grid according to the final adjustment power value, thereby realizing real-time and dynamic adjustment of the voltage at the end of the rural power grid, avoiding static voltage adjustment mode, responding to load changes in real time, meeting dynamic needs, being suitable for use in various regions, and improving the stability of power quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the system flow of the present invention. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figure 1 , an adaptive droop power control system for managing low voltage at the end of the rural power grid, the system consists of a voltage data acquisition unit, a current data acquisition unit, a power grid data processing unit and a regulation unit, wherein the functions of each unit are as follows:

[0037] The voltage data acquisition unit is used to collect the voltage data at the end of the rural power grid. The voltage data acquisition unit sends all the voltage data in the same acquisition cycle to the power grid data processing unit according to the acquisition cycle. The voltage data in the same acquisition cycle is expressed as: {V1, V2, ..., V n};

[0038] The current data acquisition unit is used to collect the current data at the end of the rural power grid. The current data acquisition unit sends all the current data in the same acquisition cycle to the power grid data processing unit according to the acquisition cycle. All the current data in the same acquisition cycle are expressed as: {L1, L2, ..., L n};

[0039] It should be noted that all voltage data and current data in the same acquisition cycle have the same number, the same acquisition interval, and the same acquisition cycle, so as to avoid data alignment, reduce calculation steps, and improve the speed of system data calculation.

[0040] The power grid data processing unit pre-processes all the voltage data and all the current data received within the acquisition cycle, respectively, and the calculation expressions are as follows:

[0041] The actual voltage measurement value calculation expression is as follows:

[0042]

[0043] In the formula, SV represents the actual voltage measurement value, It means to sum all the voltage data in the same acquisition cycle. It means that the average value of the summed results is obtained, and the result is the actual voltage measurement value.

[0044] The actual current measurement value calculation expression is:

[0045]

[0046] In the formula, SL represents the actual current measurement value, It means to sum all the current data in the same acquisition cycle. It means that the average value of the summed results is obtained, and the result is the actual current measurement value.

[0047] By preprocessing the current data and voltage data, the two data values ​​are made closer to the actual values ​​within the acquisition period, and are used as corresponding actual values ​​to improve the accuracy of the results generated by subsequent calculations.

[0048] After the actual voltage measurement value and the actual current measurement value are calculated, the voltage deviation value and the actual power during the acquisition period are calculated respectively, where:

[0049] The actual power calculation expression during the acquisition period is:

[0050] Sgl=SL*SV

[0051] In the formula, Sgl represents the actual power during the acquisition period.

[0052] The voltage deviation value calculation expression is as follows:

[0053] VP=MV-SV

[0054] In the formula, VP represents the voltage deviation value, and MV represents the target voltage, that is, the preset voltage value, which can be directly obtained in the control system. By calculating the voltage deviation value, the difference between the actual voltage and the preset voltage, that is, the voltage deviation, can be objectively obtained.

[0055] The power grid data processing unit calculates the power deviation value based on the actual power calculated during the acquisition period. The calculation expression is as follows:

[0056] glP=Mg-Sgl

[0057] In the formula, glP represents the power deviation value, and Mg represents the target power, that is, the preset power value. By calculating the power deviation value, we can objectively grasp the deviation value between the actual power and the preset power. At the same time, we can calculate the adjustment factor according to the voltage deviation value that has appeared. By calculating the adjustment factor, we can use it as a factor to correct the actual power value, so as to adjust the actual power value according to the actual situation, thereby realizing the adaptive droop power adjustment. The adjustment factor calculation expression is as follows:

[0058] TJ=ZY V *VP+ZY g *glP

[0059] In the formula, TJ represents the adjustment factor, ZY V Indicates the set voltage gain coefficient, ZY g Indicates the set power gain coefficient.

[0060] Among them, the voltage gain coefficient and power gain data are manually set according to the environment of the area where the rural power grid is located. Under the current environment, the adjustment factor can be obtained by combining the corresponding voltage deviation value and power deviation value. The adjustment factor is used as a compensation value and combined with the current power value to obtain the final adjustment power value as the adjusted power value. The calculation expression is as follows:

[0061] ZZgl=Sgl+TJ

[0062] In the formula, ZZgl represents the final adjusted power value.

[0063] The final regulated power value generated is used as a real-time adjustment of the droop power at the end of the rural power grid taking into account the current power difference, thereby achieving dynamic voltage regulation, meeting the actual use environment, and improving power quality.

[0064] The generated final regulated power value is sent to the regulating unit through the power grid data processing unit, and the regulating unit regulates the low voltage droop power at the end of the rural power grid according to the generated final regulated power value.

[0065] By collecting voltage data and current data at the end of the rural power grid and preprocessing these two data, the two values ​​are made closer to the actual values, namely the actual voltage measurement value and the actual current measurement value, and the voltage deviation value and the power deviation value are calculated respectively. After the two deviation values ​​are calculated, the adjustment factor is calculated according to the two deviation values. After the adjustment factor is generated, the actual power in the collection week is calculated according to the actual voltage measurement value and the actual current measurement value. The actual power in the collection period and the adjustment factor are combined to calculate the final adjustment power value. The adjustment unit adjusts the droop power of the low voltage at the end of the rural power grid according to the final adjustment power value, thereby realizing real-time and dynamic adjustment of the voltage at the end of the rural power grid, avoiding static voltage adjustment methods, responding to load changes in real time, meeting dynamic needs, being suitable for use in various regions, and improving the stability of power quality.

[0066] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An adaptive droop power control system for managing low voltage at the end of a rural power grid, characterized by: It includes a voltage data acquisition unit, a current data acquisition unit, a power grid data processing unit and a regulation unit; The voltage data acquisition unit is used to collect voltage data at the end of the rural power grid, and the current data acquisition unit is used to collect current data at the end of the rural power grid. The voltage data acquisition unit sends all voltage data within the same acquisition cycle to the power grid data processing unit according to the acquisition cycle, and the current data acquisition unit sends all current data within the same acquisition cycle to the power grid data processing unit according to the acquisition cycle; The power grid data processing unit pre-processes all the voltage data and all the current data received within the collection period, respectively, and obtains the actual voltage measurement value and the actual current measurement value, respectively. After the actual voltage measurement value and the actual current measurement value are calculated, the voltage deviation value and the actual power within the collection period are calculated, respectively. The power grid data processing unit calculates the power deviation value according to the actual power within the collection period calculated, and the power grid data processing unit calculates the adjustment factor according to the power deviation value and the voltage deviation value generated by the calculation. After the adjustment factor is calculated, the power grid data processing unit calculates the final adjustment power value according to the adjustment factor and the actual power within the collection period, and sends the final adjustment power value to the adjustment unit; After receiving the final adjustment power value, the adjustment unit controls the power at the rural power terminal according to the final adjustment power value.

2. The adaptive droop power control system for managing low voltage at the end of the rural power grid according to claim 1 is characterized by: All the voltage data in the same acquisition cycle are expressed as: {V1, V2, ..., V n }, all the current data in the same acquisition cycle are expressed as: {L1, L2, ..., L n }, and the number of all voltage data and current data in the same collection period is the same, the collection interval is the same, and the collection period is the same.

3. The adaptive droop power control system for managing low voltage at the end of the rural power grid according to claim 2 is characterized by: The actual voltage measurement value calculation expression is as follows: In the formula, SV represents the actual voltage measurement value, It means to sum all the voltage data in the same acquisition cycle. It means that the average value of the summed results is obtained, and the result is the actual voltage measurement value.

4. The adaptive droop power control system for managing low voltage at the end of the rural power grid according to claim 3 is characterized by: The actual current measurement value calculation expression is: In the formula, SL represents the actual current measurement value, It means to sum all the current data in the same acquisition cycle. It means that the average value of the summed results is obtained, and the result is the actual current measurement value.

5. The adaptive droop power control system for managing low voltage at the end of the rural power grid according to claim 4 is characterized in that: The actual power calculation expression during the acquisition period is: Sgl=SL*SV In the formula, Sgl represents the actual power during the acquisition period.

6. The adaptive droop power control system for managing low voltage at the end of the rural power grid according to claim 5, characterized in that: The voltage deviation value calculation expression is as follows: VP=MV-SV In the formula, VP represents the voltage deviation value, and MV represents the target voltage, that is, the preset voltage value.

7. The adaptive droop power control system for managing low voltage at the end of the rural power grid according to claim 6, characterized in that: The power deviation value calculation expression is as follows: glP=Mg-Sgl In the formula, glP represents the power deviation value, and Mg represents the target power, that is, the preset power value.

8. The adaptive droop power control system for managing low voltage at the end of the rural power grid according to claim 7, characterized in that: The adjustment factor calculation expression is as follows: TJ=ZY V *VP+ZY g *glP In the formula, TJ represents the adjustment factor, ZY V Indicates the set voltage gain coefficient, ZY g Indicates the set power gain coefficient.

9. The adaptive droop power control system for managing low voltage at the end of the rural power grid according to claim 8, characterized in that: The final adjusted power value calculation expression is as follows: ZZgl=Sgl+TJ In the formula, ZZg l represents the final adjusted power value.

10. The adaptive droop power control system for managing low voltage at the end of the rural power grid according to claim 9, characterized in that: When the power grid data processing unit calculates and generates the final adjustment power value, it sends it to the adjustment unit, and the adjustment unit adjusts the low voltage droop power at the end of the rural power grid according to the final adjustment power value.

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