An adaptive droop power control system for treating low voltage at the end of a rural power grid

Abstract

The present application relates to the technical field of low-voltage droop power adjustment at the end of rural power grid, and discloses a self-adaptive droop power control system for treating low-voltage at the end of rural power grid. The self-adaptive droop power control system for treating low-voltage at the end of rural power grid collects voltage data and current data at the end of rural power grid, pre-processes the two kinds of data, calculates an adjustment factor according to the two deviation values, calculates the actual power in a collection cycle according to the actual voltage measurement value and the actual current measurement value after the adjustment factor is generated, combines the actual power in the collection cycle and the adjustment factor to calculate a final adjustment power value, and adjusts the droop power of low-voltage at the end of rural power grid according to the final adjustment power value, so as to realize real-time dynamic adjustment of the voltage at the end of rural power grid, avoid static voltage adjustment mode, correspond to load changes in real time, meet dynamic demand, be suitable for use in various regions, and improve power quality stability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of low-voltage droop power adjustment at the end of the rural power grid, in particular to a self-adaptive droop power control system for treating low-voltage at the end of the rural power grid. BACKGROUND

[0002] In modern agricultural production, the stability and reliability of power supply are of great importance. However, due to long lines, uneven and scattered loads, and other reasons, low voltage often occurs at the end of the rural power grid. This low voltage phenomenon not only affects the normal operation of agricultural production equipment, but also can lead to poor crop growth, equipment damage, and energy waste, thereby hindering the progress of agricultural modernization.

[0003] Traditional voltage regulation methods, such as using transformer voltage regulation, adjusting switching devices, or adding branch lines, often face many limitations. The limitations of these methods mainly lie in the following aspects: first, due to line losses, the effect of traditional voltage boosting measures is limited, especially in high-load or long-distance power supply situations, the voltage often cannot meet the power 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 cycle and weather changes, load fluctuations are large, and static voltage regulation methods are difficult to adapt to such dynamic demands, especially in remote areas, which can easily lead to unstable power quality. SUMMARY

[0004] (I) Technical problems solved

[0005] To solve the above problems, the present application provides a self-adaptive droop power control system for treating low-voltage at the end of the rural power grid, which has the advantages of collecting voltage data and current data at the end of the rural power grid, preprocessing these two data to make them closer to the actual generated values, calculating the voltage deviation value and the power deviation value, calculating the adjustment factor according to the two deviation values, calculating the actual power in the collection period according to the actual voltage measurement value and the actual current measurement value, combining the actual power in the collection period and the adjustment factor to calculate the final adjustment power value, and adjusting the droop power of low-voltage at the end of the rural power grid according to the final adjustment power value, thereby realizing real-time dynamic adjustment of the voltage at the end of the rural power grid, avoiding static voltage regulation methods, and meeting dynamic demands, suitable for use in various regions, improving power quality stability, etc.

[0006] (II) Technical solutions

[0007] In order to achieve the above object, the present application provides the following technical scheme: a self-adaptive droop power control system for treating 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 an adjusting unit;

[0008] The voltage data acquisition unit is used for acquiring voltage data at the end of the rural power grid, and the current data acquisition unit is used for acquiring current data at the end of the rural power grid.

[0009] The power grid data processing unit respectively pre-processes all voltage data in a collection cycle and all current data in the collection cycle, and respectively obtains actual voltage measurement and actual current measurement.

[0010] After the actual voltage measurement and the actual current measurement are calculated, the power grid data processing unit calculates a voltage deviation value and actual power in the collection cycle.

[0011] After the adjustment factor is calculated, the power grid data processing unit calculates a final adjustment power value according to the adjustment factor and the actual power in the collection cycle, and sends the final adjustment power value to the adjusting unit. n n Preferably, all voltage data in the same collection cycle is represented as: {V1, V2,..., Vn}, all current data in the same collection cycle is represented as: {L1, L2,..., Ln}, and the number of all voltage data and current data in the same collection cycle is the same, the collection interval is the same, and the collection cycle is the same.

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

[0013]

[0014] In the formula, SV represents the actual voltage measurement, represents summing all voltage data in the same collection cycle, represents averaging the result after summing, and the result is the actual voltage measurement.

[0015] Preferably, the actual current measurement calculation expression is as follows: ​

[0016]

[0017] In the formula, SL represents the actual current measurement value, represents summing all current data in the same collection cycle, represents averaging the result after summing, and the result is the actual current measurement value.

[0018] Preferably, the actual power calculation expression in the collection cycle is:

[0019] Sgl=SL*SV

[0020] In the formula, Sgl represents the actual power in the collection cycle.

[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, i.e. 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, i.e. 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 represents the set voltage gain coefficient, ZY g represents 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 grid data processing unit calculates the final adjusted power value, the final adjusted power value is sent 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 adjusted power value.

[0032] Compared with the prior art, the application provides an adaptive droop power control system for treating low voltage at the end of a rural power grid, and has the following beneficial effects:

[0033] The present application collects voltage data and current data at the end of the rural power grid, pre-processes the two data, so that the two values are closer to the actual generated values, and then calculates the voltage deviation value and the power deviation value, calculates the two deviation values, calculates the adjustment factor according to the two deviation values, generates the adjustment factor, calculates the actual power in the collection period according to the actual voltage measurement value and the actual current measurement value, combines the actual power in the collection period and the adjustment factor to calculate the final adjustment power value, and adjusts the drooping power of the low voltage at the end of the rural power grid according to the final adjustment power value, so as to realize real-time dynamic adjustment of the voltage at the end of the rural power grid, avoid static voltage adjustment mode, can respond to load changes in real time, meet dynamic demand, suitable for use in various regions, and improve power quality stability. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is a system flowchart of the present application. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0036] Please refer to Figure 1 A self-adaptive drooping power control system for governing low voltage at the end of the rural power grid, the system is composed of a voltage data acquisition unit, a current data acquisition unit, a power grid data processing unit and an adjustment unit, wherein each unit functions as follows:

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

[0038] The current data acquisition unit is used to acquire current data at the end of the rural power grid, and the current data acquisition unit sends all current data in the same collection period to the power grid data processing unit according to the collection period, and all current data in the same collection period is represented as: {L1, L2,..., L n};

[0039] It should be noted that the number of all voltage data and current data in the same acquisition cycle is the same, the acquisition interval is the same, and the acquisition cycle is the same, thereby avoiding data alignment, reducing operation steps, and improving the speed of system data calculation.

[0040] The power grid data processing unit respectively pre-processes all voltage data in the received acquisition cycle and all current data in the acquisition cycle, 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, represents summing all voltage data in the same acquisition cycle, represents averaging the sum result, 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, represents summing all current data in the same acquisition cycle, represents averaging the sum result, and the result is the actual current measurement value.

[0047] By pre-processing the current data and voltage data, the two data values are closer to the actual values in the acquisition cycle, and are used as the corresponding actual values, improving the accuracy of the subsequent calculation results.

[0048] When the actual voltage measurement value and the actual current measurement value are calculated, the voltage deviation value and the actual power in the acquisition cycle are calculated, wherein:

[0049] The actual power in the acquisition cycle calculation expression is:

[0050] Sgl=SL*SV

[0051] In the formula, Sgl represents the actual power in the acquisition cycle.

[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, i.e., the preset voltage value. The voltage deviation value can be calculated to objectively obtain the difference between the actual voltage and the preset voltage, i.e., the voltage deviation that occurs.

[0055] The power deviation value in the collection period is calculated by the grid data processing unit according to the calculation, and 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, i.e., the preset power value. By calculating the power deviation value, the actual power and the preset power can be objectively mastered. At the same time, the adjustment factor can be calculated according to the voltage deviation value that has occurred. The adjustment factor can be used as a factor for correcting the actual power value, so that the actual power value can be adjusted according to the actual situation, thereby realizing the self-adaptive regulation of the droop power. 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 represents the set voltage gain coefficient, and ZY g represents the set power gain coefficient.

[0060] The voltage gain coefficient and the power gain data are both manually set according to the environment of the rural power consumption area. The adjustment factor can be obtained in the current environment and in combination with the corresponding voltage deviation value and power deviation value. The adjustment factor is used as a compensation value, combined with the current power value, to obtain the final adjusted 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 adjusted power value is used to adjust the droop power at the end of the rural power grid in real time by considering the current generated power difference, to realize dynamic voltage regulation, meet the actual use environment, and improve the power quality.

[0064] The final adjusted power value is sent to the adjustment unit by the grid data processing unit, and the adjustment unit adjusts the low-voltage droop power at the end of the rural power grid according to the final adjusted power value.

[0065] The voltage data and current data of the end of the rural power grid are collected, the two kinds of data are preprocessed, the actual voltage measurement value and the actual current measurement value are obtained, the voltage deviation value and the power deviation value are calculated, the adjustment factor is calculated according to the two deviation values, the actual power in the collection week is calculated according to the actual voltage measurement value and the actual current measurement value, the final adjustment power value is calculated by combining the actual power in the collection period and the adjustment factor, and the low voltage droop power at the end of the rural power grid is adjusted according to the final adjustment power value, so that the voltage at the end of the rural power grid is dynamically adjusted in real time, the static voltage adjustment mode is avoided, the load change can be responded in real time, the dynamic demand is met, the use of various regions is suitable, and the power quality stability is improved.

[0066] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application 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 rural power grids, characterized in that: 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 acquire voltage data at the end of the rural power grid, and the current data acquisition unit is used to acquire 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 preprocesses all voltage data and all current data received within the acquisition period to obtain actual voltage and current measurement values. After calculating the actual voltage and current measurement values, it calculates the voltage deviation and the actual power within the acquisition period. The power grid data processing unit calculates the power deviation based on the calculated actual power within the acquisition period. The power grid data processing unit calculates the adjustment factor based on the calculated power deviation and voltage deviation. After calculating the adjustment factor, the power grid data processing unit calculates the final adjusted power value based on the adjustment factor and the actual power within the acquisition period, and sends the final adjusted power value to the adjustment unit. After receiving the final adjusted power value, the adjustment unit controls the power at the end of the agricultural power grid according to the final adjusted power value; The expression for calculating the actual power during the acquisition period is: , in the formula, This represents the actual power during the data acquisition period. This represents the actual measured voltage value. This represents the actual measured current value; The voltage deviation value is calculated using the following expression: , in the formula, Indicates the voltage deviation value. This indicates the target voltage, i.e., the preset voltage value; The power deviation value is calculated using the following expression: , in the formula, Indicates the power deviation value. This indicates the target power, i.e., the preset power value; The formula for calculating the adjustment factor is as follows: , in the formula, Indicates the adjustment factor. This indicates the set voltage gain coefficient. This indicates the power gain coefficient that is set. The final regulated power value is calculated using the following expression: , in the formula, This indicates the final adjusted power value.

2. The adaptive droop power control system for managing low voltage at the end of rural power grids according to claim 1, characterized in that: All the voltage data within the same acquisition period are represented as follows: All the current data within the same acquisition period are represented as follows: Furthermore, all voltage and current data within the same acquisition cycle have the same number of data points, the same acquisition interval, and the same acquisition cycle.

3. The adaptive droop power control system for managing low voltage at the end of rural power grids according to claim 2, characterized in that: The expression for calculating the actual voltage measurement value is as follows: , in the formula, This indicates that all voltage data within the same acquisition period are summed. This means averaging the summed results, and the resulting value is the actual voltage measurement.

4. The adaptive droop power control system for managing low voltage at the end of rural power grids according to claim 3, characterized in that: The expression for calculating the actual current measurement value is as follows: , in the formula, This indicates that all current data within the same acquisition period are summed. This means averaging the summed results, and the resulting value is the actual current measurement.

5. The adaptive droop power control system for managing low voltage at the end of rural power grids according to claim 4, characterized in that: After the power grid data processing unit calculates and generates the final regulation power value, it sends it to the regulation unit. The regulation unit then adjusts the low voltage droop power at the end of the rural power grid according to the final regulation power value.

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