Power distribution network reactive power compensation area cooperative control system of reactive power compensation device

Abstract

The invention discloses a power distribution network reactive power compensation area cooperative control system of a reactive power compensation device, which comprises a cooperative control platform composed of a data acquisition unit, a data analysis unit, a reactive power compensation layout unit and a reactive power compensation unit, and relates to the technical field of power distribution networks. According to the power distribution network reactive power compensation area cooperative control system of the reactive power compensation device, data support is provided for calculation of a power grid compensation quantity value through collection of power grid voltage data and power grid current data, and a coordinate curve is generated according to the compensation quantity value and time in cooperation with a data analysis unit; reference data are provided for compensation value setting of fixed reactive power compensation equipment and compensation value setting of dynamic reactive power compensation equipment, the compensation value of the dynamic reactive power compensation equipment is adjusted in combination with calculation of real-time compensation values, the adjustment amplitude of the dynamic reactive power compensation equipment is reduced, and meanwhile the adjustment accuracy of the dynamic reactive power compensation equipment is improved. Cooperative control of fixed and dynamic reactive compensation on the power grid is realized, and effective support is provided for power transmission loss reduction of the power grid.

Description

Technical Field

[0001] The present invention relates to the technical field of distribution network, and in particular to a distribution network reactive compensation area collaborative control system of a reactive compensation device. Background Art

[0002] Reactive power compensation, also known as reactive power compensation, is a technology that improves the power factor of the power grid in the power supply system, reduces the loss of power supply transformers and transmission lines, improves power supply efficiency, and improves the power supply environment.

[0003] The transmission lines in the existing power grid usually adopt fixed reactive compensation, and the value of this reactive compensation cannot be adjusted. With the continuous development of new energy, the regional power grid environment is complex, and the fixed reactive compensation mode cannot effectively guarantee the optimal reactive compensation of the regional power grid, which is not conducive to reducing the transmission loss of the power grid. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the present invention provides a distribution network reactive compensation regional collaborative control system for a reactive compensation device, which solves the problem that the fixed reactive compensation mode cannot effectively guarantee the optimal reactive compensation of the regional power grid, which is not conducive to reducing the transmission loss of the power grid.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a distribution network reactive compensation area collaborative control system of a reactive compensation device, including a collaborative control platform, the collaborative control platform including a data acquisition unit, a data analysis unit, a reactive compensation layout unit and a reactive compensation unit, the data acquisition unit is used to collect grid voltage data and grid current data, the data acquisition unit is connected to the data analysis unit, the data analysis unit is used to calculate the required compensation value according to the grid voltage data and the grid current data, and generate a corresponding coordinate curve of the compensation value and the collection time according to the collection time of the corresponding data, the data analysis unit is connected to the reactive compensation layout unit, the reactive compensation layout unit is used to calculate a fixed reactive setting value and a dynamic reactive setting value, and issue a dynamic adjustment instruction according to the real-time compensation value, the reactive compensation layout unit is connected to the reactive compensation unit, the reactive compensation unit is used to build a fixed reactive compensation device and a dynamic reactive compensation device according to the fixed reactive setting value and the dynamic reactive setting value, and dynamically adjust the dynamic reactive compensation device after receiving the dynamic adjustment instruction.

[0008] The present invention is further configured as follows: the data acquisition unit includes a voltage data acquisition module and a current data acquisition module;

[0009] The voltage data acquisition module is used to collect grid voltage data;

[0010] The current data acquisition module is used to acquire grid current data.

[0011] The present invention is further configured as follows: the data analysis unit includes a voltage period association module, a compensation calculation module and a data display module, the voltage period association module is connected to the compensation calculation module, and the voltage period association module is connected to the data display module.

[0012] The present invention is further configured such that: the data acquisition unit is connected to a voltage period association module.

[0013] The present invention is further configured as follows: the voltage period association module is used to receive the grid voltage data and grid current data collected by the data collection unit, as well as the collection time of the corresponding data, and establish a compensation calculation module to calculate the corresponding coordinate curve of the compensation value and the collection time;

[0014] The compensation calculation module is used to calculate the required compensation value according to the normal operating power of the power grid, and transmit the obtained compensation voltage to the voltage period association module;

[0015] The data display module is used to display grid voltage data, grid current data, compensation value and acquisition time.

[0016] The present invention is further configured as follows: the reactive compensation layout unit includes a stable layout module, a command output module and a reactive compensation adjustment module, the stable layout module is connected to the command output module, and the command output module is connected to the reactive compensation adjustment module.

[0017] The present invention is further configured as follows: the stable deployment module is used to obtain a coordinate curve within a day, a month, a quarter, or a year, remove the maximum trough data and the minimum peak data in the coordinate curve, calculate the mean of the sub-maximum trough data and the sub-minimum peak data, calculate the mean of the minimum trough data and the minimum peak data, use the absolute value of the difference between the two means as a constant compensation value, use the constant compensation value as a fixed reactive power setting value, subtract the constant compensation value from the maximum peak value, and obtain a dynamic reactive power setting value;

[0018] The instruction output module is used to calculate the difference between the compensation value collected in real time and the constant compensation value;

[0019] The reactive power compensation adjustment module is used to issue a dynamic start instruction containing difference data when the difference is a positive value.

[0020] The present invention is further configured as follows: the reactive power compensation unit comprises a fixed reactive power compensation module, a dynamic adjustment module and a dynamic reactive power compensation module, and the dynamic adjustment module is connected to the dynamic reactive power compensation module.

[0021] The present invention is further configured such that: the reactive power compensation regulation module is connected to the dynamic adjustment module.

[0022] The present invention is further configured as follows: the fixed reactive power compensation module is used to select a fixed reactive power compensation device for a corresponding value compensation voltage according to a fixed reactive power setting value, and to build the fixed reactive power compensation device in parallel to the power grid;

[0023] The dynamic reactive power compensation module is used to select a dynamic reactive power compensation device for a corresponding value compensation voltage according to a dynamic reactive power setting value, and to connect the dynamic reactive power compensation device in parallel to the power grid;

[0024] The dynamic adjustment module is used to receive a dynamic start instruction including difference data, and to control the AC side current according to the difference data, and to adjust the reactive power of the dynamic reactive compensation device.

[0025] (III) Beneficial effects

[0026] The present invention provides a distribution network reactive compensation regional coordinated control system for reactive compensation devices, which has the following beneficial effects:

[0027] (1) The present invention provides data support for the calculation of grid compensation values ​​by collecting grid voltage data and grid current data. Under the setting of a data analysis unit, a coordinate curve is generated according to the compensation value and time, and reference data is provided for the compensation value setting of a fixed reactive compensation device and a dynamic reactive compensation device. Combined with the calculation of the real-time compensation value, the compensation value of the dynamic reactive compensation device is adjusted, and while reducing the adjustment amplitude of the dynamic reactive compensation device, the coordinated control of the fixed and dynamic reactive compensation on the grid is achieved, thereby providing effective support for grid transmission loss reduction.

[0028] (2) The present invention avoids sudden impacts caused by power grid fluctuations by calculating a constant compensation value. By combining the calculation of the average of the sub-maximum trough data and the sub-minimum peak data and the average of the minimum trough data and the minimum peak data, the absolute value of the difference between the two is used to generate a constant compensation value as the rated compensation value of the fixed reactive compensation device, thereby reducing the adjustment range of dynamic reactive compensation and providing support for the stability of the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a system principle block diagram of the present invention;

[0030] Figure 2 It is a system principle block diagram of the data analysis unit of the present invention;

[0031] Figure 3 It is a system principle block diagram of the reactive power compensation arrangement unit and the reactive power compensation unit of the present invention.

[0032] In the figure, 1. Collaborative control platform; 2. Data acquisition unit; 3. Data analysis unit; 4. Reactive compensation layout unit; 5. Reactive compensation unit; 6. Voltage data acquisition module; 7. Current data acquisition module; 8. Voltage time period association module; 9. Compensation calculation module; 10. Data display module; 11. Stable layout module; 12. Command output module; 13. Reactive compensation adjustment module; 14. Fixed reactive compensation module; 15. Dynamic adjustment module; 16. Dynamic reactive compensation module. DETAILED DESCRIPTION

[0033] 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.

[0034] See also Figure 1-3 , the embodiment of the present invention provides the following two technical solutions:

[0035] Embodiment 1

[0036] A reactive compensation area collaborative control system for a distribution network of a reactive compensation device comprises a collaborative control platform 1 composed of a data acquisition unit 2, a data analysis unit 3, a reactive compensation layout unit 4 and a reactive compensation unit 5.

[0037] As a preferred solution, in order to collect power grid data, the data collection unit 2 includes a voltage data collection module 6 and a current data collection module 7;

[0038] The voltage data acquisition module 6 is used as a voltage transformer to collect grid voltage data;

[0039] The current data acquisition module 7 is used as a current transformer to collect grid current data.

[0040] As a preferred solution, in order to achieve the optimization analysis and judgment of the power grid compensation value, the data analysis unit 3 is used to calculate the required compensation value according to the power grid voltage data and the power grid current data, and generate a corresponding coordinate curve of the compensation value and the acquisition time according to the acquisition time of the corresponding data. The data analysis unit 3 includes a voltage period association module 8, a compensation calculation module 9 and a data display module 10. The data acquisition unit 2 is connected to the voltage period association module 8. The voltage period association module 8 is used to receive the power grid voltage data and the power grid current data collected by the data acquisition unit 2, as well as the acquisition time of the corresponding data, and establish a corresponding coordinate curve between the compensation value and the acquisition time calculated by the compensation calculation module 9. The coordinate curve takes the acquisition time as the X-axis and the compensation value as the Y-axis.

[0041] The voltage period association module 8 is connected to the compensation calculation module 9. The compensation calculation module 9 is used to calculate the required compensation value according to the normal operating power of the power grid, and transmit the obtained compensation voltage to the voltage period association module 8;

[0042] The voltage period association module 8 is connected to the data display module 10, and the data display module 10 is used to display the grid voltage data, grid current data, compensation value and acquisition time.

[0043] As a preferred solution, in order to achieve the optimal judgment of the corresponding compensation value, the reactive compensation layout unit 4 includes a stable layout module 11, an instruction output module 12 and a reactive compensation adjustment module 13. The stable layout module 11 is used to obtain a coordinate curve within a day, a month, a quarter or a year, remove the maximum trough data and the minimum peak data in the coordinate curve, calculate the average of the sub-maximum trough data and the sub-minimum peak data, use the average as a constant compensation value, use the constant compensation value as a fixed reactive setting value, subtract the constant compensation value from the maximum peak value, and obtain a dynamic reactive setting value;

[0044] The stable deployment module 11 is connected to the instruction output module 12, and the instruction output module 12 is used to calculate the difference between the real-time collected compensation value and the constant compensation value;

[0045] The instruction output module 12 is connected to the reactive power compensation adjustment module 13. The reactive power compensation adjustment module 13 is used to issue a dynamic start instruction containing difference data when the difference is a positive value.

[0046] As a preferred solution, in order to effectively reduce the power grid loss, the reactive power compensation unit 5 includes a fixed reactive power compensation module 14, a dynamic adjustment module 15 and a dynamic reactive power compensation module 16. The fixed reactive power compensation module 14 is used to select a fixed reactive power compensation device for a corresponding value compensation voltage according to a fixed reactive power setting value, and connect the fixed reactive power compensation device in parallel to the power grid;

[0047] The dynamic adjustment module 15 is connected to the dynamic reactive power compensation module 16. The dynamic reactive power compensation module 16 is used to select a dynamic reactive power compensation device for a corresponding value compensation voltage according to a dynamic reactive power setting value, and to connect the dynamic reactive power compensation device in parallel to the power grid.

[0048] The reactive power compensation regulating module 13 is connected to the dynamic adjusting module 15. The dynamic adjusting module 15 is used to receive the dynamic starting instruction including the difference data, and control the AC side current according to the difference data to adjust the reactive power of the dynamic reactive power compensation device.

[0049] In this embodiment, coordinated control of fixed reactive power compensation equipment and dynamic reactive power equipment is implemented, and stable reactive power compensation is provided for the power grid while reducing the adjustment range of the compensation value of the dynamic reactive power equipment.

[0050] Embodiment 2

[0051] This embodiment is an improvement of the previous embodiment. It is a coordinated control system for reactive compensation area of ​​a distribution network of a reactive compensation device. The stable layout module 11 is used to obtain a coordinate curve within a day, a month, a quarter or a year, remove the maximum trough data and the minimum peak data in the coordinate curve, calculate the average of the sub-maximum trough data and the sub-minimum peak data, calculate the average of the minimum trough data and the minimum peak data, use the absolute value of the difference between the two averages as a constant compensation value, use the constant compensation value as a fixed reactive setting value, use the constant compensation value as a fixed reactive setting value, subtract the constant compensation value from the maximum peak value, and obtain a dynamic reactive setting value.

[0052] The advantages of Example 2 over Example 1 are: introducing the mean calculation of the minimum trough data and the minimum peak data, and taking the absolute value of the difference between the two means as the constant compensation value. When the dynamic reactive compensation equipment is not introduced, it is ensured that the horizontal straight line formed by the constant compensation value can intersect the coordinate curve more stably, thereby improving the effective working time of the fixed reactive compensation equipment and providing more accurate and effective assistance for the collaborative control of the dynamic reactive compensation equipment.

[0053] The method for using the distribution network reactive compensation area collaborative control system of the reactive compensation device includes:

[0054] S1, power grid data collection: use the voltage data collection module 6 to collect power grid voltage data, use the current data collection module 7 to collect power grid current data, and transmit the collected data and the time of data collection to S2;

[0055] S2, data analysis: the voltage period association module 8 receives the grid voltage data and grid current data collected by S1, as well as the collection time of the corresponding data. The compensation calculation module 9 is used to calculate the required compensation value according to the normal operating power of the grid, and transmit the obtained compensation voltage to the voltage period association module 8. The voltage period association module 8 establishes a corresponding coordinate curve between the compensation value and the collection time. The coordinate curve takes the collection time as the X-axis and the compensation value as the Y-axis. During the process, the data display module 10 performs a visual display of the grid voltage data, the grid current data, the compensation value and the collection time.

[0056] S3, reactive power compensation layout: the stable layout module 11 obtains the coordinate curve within one day, one month, one quarter or one year, removes the maximum trough data and the minimum peak data in the coordinate curve, calculates the mean of the sub-maximum trough data and the sub-minimum peak data, calculates the mean of the minimum trough data and the minimum peak data, and uses the absolute value of the difference between the two means as the constant compensation value. The fixed reactive power compensation module 14 selects a fixed reactive power compensation device for the corresponding numerical compensation voltage according to the fixed reactive power setting value, and builds the fixed reactive power compensation device in parallel to the power grid, uses the constant compensation value as the fixed reactive power setting value, and subtracts the constant compensation value from the maximum peak value to obtain the dynamic reactive power setting value. The dynamic reactive power compensation module 16 selects a dynamic reactive power compensation device for the corresponding numerical compensation voltage according to the dynamic reactive power setting value, and builds the dynamic reactive power compensation device in parallel to the power grid;

[0057] S4. Dynamic control: The command output module 12 calculates the difference between the compensation value collected in real time and the constant compensation value. When the difference is positive, the reactive power compensation adjustment module 13 issues a dynamic start command including the difference data. The dynamic adjustment module 15 is used to receive the dynamic start command including the difference data, and controls the AC side current according to the difference data, so as to adjust the reactive power of the dynamic reactive power compensation device.

[0058] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0059] 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. A distribution network reactive power compensation regional collaborative control system of a reactive power compensation device, comprising a collaborative control platform (1), characterized in that: The collaborative control platform (1) comprises a data acquisition unit (2), a data analysis unit (3), a reactive power compensation arrangement unit (4) and a reactive power compensation unit (5), wherein the data acquisition unit (2) is used to acquire grid voltage data and grid current data, the data acquisition unit (2) is connected to the data analysis unit (3), the data analysis unit (3) is used to calculate the required compensation value according to the grid voltage data and grid current data, and to generate a corresponding coordinate curve of the compensation value and the acquisition time according to the acquisition time of the corresponding data, the data analysis unit (3) is connected to the reactive power compensation arrangement unit (4), the reactive power compensation arrangement unit (4) is used to calculate a fixed reactive power setting value and a dynamic reactive power setting value, and to issue a dynamic adjustment instruction according to the real-time compensation value, the reactive power compensation arrangement unit (4) is connected to the reactive power compensation unit (5), the reactive power compensation unit (5) is used to build a fixed reactive power compensation device and a dynamic reactive power compensation device according to the fixed reactive power setting value and the dynamic reactive power setting value, and to dynamically adjust the dynamic reactive power compensation device after receiving the dynamic adjustment instruction.

2. According to claim 1, a reactive power compensation area coordinated control system for a distribution network of a reactive power compensation device is characterized in that: The data acquisition unit (2) comprises a voltage data acquisition module (6) and a current data acquisition module (7); The voltage data acquisition module (6) is used to collect grid voltage data; The current data acquisition module (7) is used to acquire grid current data.

3. The distribution network reactive compensation regional coordinated control system of a reactive compensation device according to claim 1, characterized in that: The data analysis unit (3) comprises a voltage period association module (8), a compensation calculation module (9) and a data display module (10); the voltage period association module (8) is connected to the compensation calculation module (9); and the voltage period association module (8) is connected to the data display module (10).

4. A distribution network reactive compensation regional coordinated control system for a reactive compensation device according to claim 3, characterized in that: The data acquisition unit (2) is connected to the voltage period association module (8).

5. A distribution network reactive compensation regional coordinated control system for a reactive compensation device according to claim 4, characterized in that: The voltage period association module (8) is used to receive the grid voltage data and grid current data collected by the data collection unit (2), as well as the collection time of the corresponding data, and to establish a compensation calculation module (9) to calculate a corresponding coordinate curve between the compensation value and the collection time; The compensation calculation module (9) is used to calculate the required compensation value according to the normal operating power of the power grid, and transmit the obtained compensation voltage to the voltage period association module (8); The data display module (10) is used to display grid voltage data, grid current data, compensation value and acquisition time.

6. The reactive power compensation regional coordinated control system for a distribution network of a reactive power compensation device according to claim 1, characterized in that: The reactive power compensation arrangement unit (4) comprises a stable arrangement module (11), a command output module (12) and a reactive power compensation adjustment module (13); the stable arrangement module (11) is connected to the command output module (12), and the command output module (12) is connected to the reactive power compensation adjustment module (13).

7. A distribution network reactive compensation regional coordinated control system for a reactive compensation device according to claim 6, characterized in that: The stable deployment module (11) is used to obtain a coordinate curve within a day, a month, a quarter or a year, remove the maximum trough data and the minimum peak data in the coordinate curve, calculate the average of the second maximum trough data and the second minimum peak data, calculate the average of the minimum trough data and the minimum peak data, use the absolute value of the difference between the two averages as a constant compensation value, use the constant compensation value as a fixed reactive power setting value, subtract the constant compensation value from the maximum peak value, and obtain a dynamic reactive power setting value; The instruction output module (12) is used to calculate the difference between the real-time collected compensation value and the constant compensation value; The reactive power compensation adjustment module (13) is used to issue a dynamic start instruction containing difference data when the difference is a positive value.

8. A distribution network reactive compensation regional coordinated control system for a reactive compensation device according to claim 7, characterized in that: The reactive power compensation unit (5) comprises a fixed reactive power compensation module (14), a dynamic adjustment module (15) and a dynamic reactive power compensation module (16); the dynamic adjustment module (15) is connected to the dynamic reactive power compensation module (16).

9. A distribution network reactive compensation regional coordinated control system for a reactive compensation device according to claim 8, characterized in that: The reactive power compensation adjustment module (13) is connected to the dynamic adjustment module (15).

10. A distribution network reactive compensation regional coordinated control system for a reactive compensation device according to claim 9, characterized in that: The fixed reactive power compensation module (14) is used to select a fixed reactive power compensation device for a corresponding value compensation voltage according to a fixed reactive power setting value, and to connect the fixed reactive power compensation device in parallel to the power grid; The dynamic reactive power compensation module (16) is used to select a dynamic reactive power compensation device for a corresponding value compensation voltage according to a dynamic reactive power setting value, and to connect the dynamic reactive power compensation device in parallel to the power grid; The dynamic adjustment module (15) is used to receive a dynamic start instruction containing difference data, and to control the AC side current according to the difference data, thereby adjusting the reactive power of the dynamic reactive compensation device.

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