Power grid coordinated operation control method and device

Abstract

The invention discloses a power grid coordinated operation control method and device, and belongs to the technical field of power grid coordination. Processing the active power of the charging pile grid-connected point; transmitting charging pile grid-connected point active power; the power grid coordination terminal reconstructs charging pile grid-connected point active power; according to the invention, an integral, reliable and rapid power grid coordinated operation control method is formed, the reliability and accuracy of transmitting the active power of the charging pile grid-connected point are improved, the completeness correction and error correction functions of the active power of the charging pile grid-connected point are also improved, and the maneuverability and compatibility are synchronously improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of power grid coordination, and in particular relates to a power grid coordinated operation control method and device. Background Art

[0002] The whole of the power system, which consists of substations and transmission and distribution lines of various voltages, is called a power grid. It includes three units: substation, transmission, and distribution. The task of the power grid is to transmit and distribute electrical energy and change the voltage.

[0003] In order to coordinate the operation of the power grid, it is often necessary to use the existing technical solution in the patent publication number 'CN114069730B'. It is generally used on the power grid coordination terminal to obtain the number and topological position of the charging piles connected to the power grid, the inverter capacity of the charging piles, the active power of the charging pile grid connection point, the distance from each charging pile to the trunk line and the distance between each node of the line. Finally, the coordinated correction relationship of the power surplus and shortage between each reactive compensation sub-area is determined to carry out reactive coordination of the regional distribution network.

[0004] On the other hand, the grid coordination terminal obtains the active power of the charging pile grid connection point in the following way: the smart meter is connected to the grid coordination terminal in communication, and the smart meter is used to collect the active power of the charging pile grid connection point connected to the grid and transmit it to the grid coordination terminal so that the grid coordination terminal can obtain the active power of the charging pile grid connection point. However, during the period when the smart meter transmits the active power of the charging pile grid connection point to the grid coordination terminal, it often has the following defects:

[0005] Reliability of active power at charging pile grid connection points: Traditional methods of transmitting active power at charging pile grid connection points often lack sufficient reliable protection solutions and are often subject to unauthorized reading and editing, resulting in violations of the privacy and integrity of the active power at charging pile grid connection points.

[0006] Compatibility and flexibility: Since the types and structures of active power of charging piles and grids are often different, the transmission method must have good compatibility and flexibility to handle different types of active power of charging piles and grids. Summary of the invention

[0007] In order to solve the defects existing in the prior art, the present invention proposes a grid coordinated operation control method and device, which collects the active power of the charging pile grid connection point; performs processing on the active power of the charging pile grid connection point; transmits the active power of the charging pile grid connection point; the grid coordination terminal reconstructs the active power of the charging pile grid connection point; the present invention constitutes an integrated, reliable and fast grid coordinated operation control method, which not only improves the reliability and accuracy of transmitting the active power of the charging pile grid connection point, but also improves the completeness proofreading and error correction function of the active power of the charging pile grid connection point, and simultaneously improves the mobility and compatibility.

[0008] The present invention utilizes the following technical solutions.

[0009] A method for controlling coordinated operation of a power grid, comprising:

[0010] The smart meter collects the active power of the charging pile grid connection point connected to the power grid and transmits it to the power grid coordination terminal so that the power grid coordination terminal obtains the active power of the charging pile grid connection point. The power grid coordination terminal finally determines the coordinated correction relationship of the power surplus and shortage between each reactive compensation sub-area based on the number and topological position of the charging piles connected to the power grid, the capacity of the charging pile inverter, the active power of the charging pile grid connection point, the distance from each charging pile to the trunk line, and the distance between each node of the line, so as to coordinate the reactive power of the regional distribution network.

[0011] The method for a smart meter to transmit active power of a charging pile grid connection point to a grid coordination terminal includes:

[0012] Step 1: Collect the active power of the charging pile and grid connection point;

[0013] Step 2: Process the active power of the charging pile grid connection point.

[0014] Preferably, in step 1, the smart meter collects the active power of all charging pile grid connection points to be transmitted as the active power of the destination charging pile grid connection point.

[0015] Preferably, in step 2, the active power of the target charging pile grid connection point is separated from the active power of the charging pile grid connection point, which includes:

[0016] Step 2-1: Obtain the bit stream of active power of the target charging pile and grid connection point;

[0017] Step 2-2: From the predefined supplementary selection cluster y∈(y1, y2...yu), select a supplementary selection quantity yk, k=1,2...u;

[0018] In the predefined bit stream arrangement library, the corresponding bit is selected according to the value of yk, and the predefined confusion bit coefficient is added to all the vertical rows of the bit, and the value of the confusion bit coefficient is zero or one;

[0019] Here, the predefined bit stream arrangement library is an array structure, u represents the number of vertical rows on the array structure, and all horizontal rows in the bit stream arrangement library are predefined with u bits;

[0020] Step 2-3: Send the corresponding bit stream to each bit in the pre-defined bit stream arrangement library in sequence according to its sequence;

[0021] Step 2-4: Select a split bit standard ej from the pre-defined split bit standard cluster e∈(e1, e2...ep), where j=1,2...p, and ej is an integer greater than one and less than u;

[0022] Step 2-5: Divide the bit stream arrangement library into a number of bit stream sub-clusters according to the selected segmentation bit standard ej;

[0023] Step 2-6: register the same identification code for the bit stream sub-clusters corresponding to the active power of the target charging pile grid connection point, and form the value of the same identification code;

[0024] After the same identification code is registered, several bit stream sub-clusters are registered with serial numbers according to the arrangement sequence of the bit stream sub-clusters, and the values ​​of the serial numbers are formed;

[0025] Step 2-7: Aggregate the same identification code value, serial number value, yk value and ej value to form a check mark;

[0026] Step 2-8: According to the method of step 2-1 to step 2-8, the active power of all target charging piles and grid points is separated and processed, and a number of corresponding bit stream sub-clusters are obtained, and the same identification code and serial number are registered for them respectively, and the corresponding verification symbol is formed synchronously according to the corresponding same identification code value, serial number value, yk value, ej value and u value;

[0027] Step 2-9: According to the number of bit stream sub-clusters corresponding to the active power of each destination charging pile grid connection point, select the value with the highest number of bit stream sub-clusters and register it as w, constructing w+1 information groups;

[0028] Send all calibration symbols corresponding to the active power of each target charging pile and grid point into one information group;

[0029] Each bit stream sub-cluster corresponding to the active power of each destination charging pile grid connection point is sent to the remaining w information groups respectively. Here, in the w information groups, one information group has only one bit stream sub-cluster corresponding to the active power of one destination charging pile grid connection point.

[0030] Preferably, in step 2-3, when a bit in the bit stream arrangement library carries a confusion bit coefficient, the bit arranged on the bit is shifted back by 1 bit and sent to the next bit.

[0031] Preferably, in step 2-4, the bit segmentation standard is the number, which is used to group the bits on the corresponding bits in each horizontal row according to the corresponding number in the bit stream arrangement library.

[0032] Preferably, the value of the same identification code formed by the same identification code registration of each bitstream sub-cluster is unique.

[0033] Preferably, after step 2, the method further comprises:

[0034] Step 3: Transmit the active power of the charging pile and grid connection point;

[0035] Step 4: The grid coordination terminal reconstructs the active power of the charging pile grid connection point.

[0036] Preferably, in step 3, a plurality of information groups are transmitted to the grid coordination terminal through a plurality of channels respectively via the smart meters.

[0037] Preferably, in step 4, a calibration symbol corresponding to the active power of each destination charging pile and grid point is selected from the corresponding information group;

[0038] Selecting a number of bit stream subclusters corresponding to the same identification code value in the check symbol;

[0039] Select the value of the sequence number in the check mark, and rearrange the corresponding selected bit stream sub-cluster, and re-construct the corresponding bit stream arrangement library;

[0040] Select yk from the checksum, and remove the bit on the corresponding bit according to the value of yk, select the bit on all bits according to the sequence of the bit stream arrangement library, and restore it to the original bit stream;

[0041] The value of the restored bit stream is regarded as the starting active power of the destination charging pile and grid connection point.

[0042] Preferably, step 4 further comprises: under the condition of reconstructing the active power of the charging pile grid connection point, selecting the corresponding check mark of each target charging pile grid connection point active power in the corresponding information group, and selecting a number of bit stream sub-clusters corresponding to the same identification code value in the check mark:

[0043] Also select the ej value and u value in the collation symbol, and execute Get the calibration index of the bit stream sub-cluster corresponding to the active power of the target charging pile grid connection point, and compare the calibration index with the number of bit stream sub-clusters selected from several information groups according to the value of the same identification code:

[0044] If the two are the same, execute backward;

[0045] If the two are different, the corresponding bit stream sub-cluster is selected again, or the information group is transmitted again;

[0046] Preferably, the steps between step 2 and step 3 also include:

[0047] Modulation treatment;

[0048] The method of modulation and treatment is:

[0049] Using LZ77 method to perform modulation on each information group;

[0050] Between step 3 and step 4 also include:

[0051] Demodulation and disposal;

[0052] The demodulation method is:

[0053] The grid coordination terminal demodulates the modulated information groups received by it via the LZ77 method and the corresponding demodulation method.

[0054] A power grid coordinated operation control device, comprising:

[0055] The smart meter is connected to the grid coordination terminal for communication. The smart meter is used to collect the active power of the grid connection point of the charging pile connected to the grid and transmit it to the grid coordination terminal so that the grid coordination terminal can obtain the active power of the grid connection point of the charging pile. The grid coordination terminal is used to determine the coordinated correction relationship of the power surplus and shortage between each reactive compensation sub-area based on the number and topological position of the charging piles connected to the grid, the capacity of the charging pile inverter, the active power of the grid connection point of the charging pile, the distance from each charging pile to the trunk line, and the distance between each node of the line, so as to perform reactive coordination on the regional distribution network;

[0056] The modules running on the power grid coordinated operation control device include:

[0057] A collection module, which is used to collect the active power of the charging pile and grid connection point;

[0058] The processing module is used to process the active power of the charging pile grid point.

[0059] The beneficial effects of the present invention are that, compared with the prior art, the technical effects of the present invention include:

[0060] Improve the reliability of transmitting the active power of the charging pile and grid connection point: By using a binary encoder and confusion bit coefficients during the separation processing of the active power of the charging pile and grid connection point, the complexity of transmitting the active power of the charging pile and grid connection point is increased, making it difficult for unauthorized terminals to decipher and edit the active power of the charging pile and grid connection point.

[0061] Improve data completeness and accuracy: Use the same identification code value and serial number value to register the bit stream sub-clusters to ensure that the active power of the charging pile grid point can be accurately restored to the original state when reconstructing the active power of the charging pile grid point, reducing the defects of missing or disordered active power of the charging pile grid point that often occur during transmission.

[0062] Achieve active power calibration of charging piles and grids: By forming a calibration symbol and performing calibration when reconstructing the active power of the charging piles and grids, the completeness and consistency of the active power of the charging piles and grids can be verified, and errors can be detected and corrected in real time.

[0063] Flexible packet transmission: Dynamically construct packets based on the number of bitstream sub-clusters, allowing faster transmission of charging pile and grid active power, and the height and number of packets can be changed according to demand.

[0064] Good compatibility: This method is not limited to the specified device and can be widely used in the transmission of active power at various charging piles and grid points.

[0065] Good error correction function: By comparing the correction index with the actual number of bit stream sub-clusters, the information group can be selected or sent again when a discrepancy is found, thus improving the error correction function of the device.

[0066] Modulation and demodulation rules: Modulation processing and demodulation processing further improve the reliability of transmitting the active power of the charging pile and grid connection point, ensuring that only authorized devices can read the active power of the charging pile and grid connection point.

[0067] In summary, the present invention constitutes an integrated, reliable and fast grid coordinated operation control method, which not only improves the reliability and accuracy of transmitting the active power of the charging pile grid connection point, but also improves the completeness proofreading and error correction function of the active power of the charging pile grid connection point, and simultaneously improves the mobility and compatibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] Figure 1 is a flow chart of the power grid coordinated operation control method described in the present invention;

[0069] Figure 2 It is a schematic diagram of the architecture of the power grid coordinated operation control device described in the present invention. DETAILED DESCRIPTION

[0070] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely expressed in combination with the drawings in the embodiments of the present invention. The embodiments expressed in this application are only part of the embodiments of the present invention, not all of them. According to the spirit of the present invention, other embodiments obtained by ordinary technicians in this field without creative labor are all within the protection scope of the present invention.

[0071] like Figure 1 As shown, a method for controlling coordinated operation of a power grid according to the present invention comprises:

[0072] The smart meter collects the active power of the charging pile grid connection point connected to the power grid and transmits it to the power grid coordination terminal so that the power grid coordination terminal obtains the active power of the charging pile grid connection point. The power grid coordination terminal finally determines the coordinated correction relationship of the power surplus and shortage between each reactive compensation sub-area based on the number and topological position of the charging piles connected to the power grid, the capacity of the charging pile inverter, the active power of the charging pile grid connection point, the distance of each charging pile to the trunk line, and the distance between each node of the line, so as to perform reactive coordination on the regional distribution network; the coordinated correction relationship of the power surplus and shortage between each reactive compensation sub-area is finally determined based on the number and topological position of the charging piles connected to the power grid, the capacity of the charging pile inverter, the active power of the charging pile grid connection point, the distance of each charging pile to the trunk line, and the distance between each node of the line, so as to perform reactive coordination on the regional distribution network. The method for reactive coordination on the regional distribution network can be achieved by the corresponding method in the prior art solution in Patent Publication No. 'CN114069730B', and the power grid coordination terminal can be a computer or an industrial computer.

[0073] The method for a smart meter to transmit active power of a charging pile grid connection point to a grid coordination terminal includes:

[0074] Step 1: Collect the active power of the charging pile and grid connection point;

[0075] In a preferred but non-limiting embodiment of the present invention, in step 1, the smart meter collects the active power of all charging pile grid connection points to be transmitted as the active power of the destination charging pile grid connection point.

[0076] Step 2: Process the active power of the charging pile grid connection point.

[0077] In a preferred but non-limiting embodiment of the present invention, in step 2, the active power of the target charging pile grid connection point is separated from the active power of the charging pile grid connection point, which includes:

[0078] Step 2-1: Using the active power of a charging pile and grid connection point as an example:

[0079] Obtain the bit stream of the active power of the target charging pile grid connection point;

[0080] Step 2-2: From the predefined supplementary selection cluster y∈(y1, y2...yu), select a supplementary selection quantity yk, k=1,2...u;

[0081] The supplementary row selection amount is a pre-set integer value, which is used to select the bit at the corresponding sequence number;

[0082] In the predefined bit stream arrangement library, the corresponding bit is selected according to the value of yk, and the predefined confusion bit coefficient is added to all the vertical rows of the bit, and the value of the confusion bit coefficient is zero or one;

[0083] By using the bit stream and confusion bit coefficient of the target charging pile grid active power during the separation processing of the charging pile grid active power, the complexity of the charging pile grid active power transmission is increased, making it difficult for unauthorized terminals to decipher and edit the charging pile grid active power.

[0084] Here, the predefined bit stream arrangement library is an array structure, u represents the number of vertical rows on the array structure, and all horizontal rows in the bit stream arrangement library are predefined with u bits, where bit is used to store bits in the bit stream;

[0085] Step 2-3: Send the corresponding bit stream to each bit in the pre-defined bit stream arrangement library in sequence according to its sequence;

[0086] Here, in a preferred but non-limiting embodiment of the present invention, in step 2-3, when a bit in the bit stream arrangement library carries a confusing bit coefficient, the bit arranged on the bit is shifted back by 1 bit and sent to the next bit.

[0087] As: the bit stream is '10111001010101010011010010111101000010'

[0088] u is twelve, and the selected yk is five;

[0089] Then the bit stream arrangement library after sending the bit stream is:

[0090] 10111‘1001010

[0091] 10100‘1001101

[0092] 00100‘1111010

[0093] 00011‘0

[0094] Here, '' is bit, ' 1‘ 'or' 0‘ ' is the confusion bit coefficient.

[0095] Step 2-4: Select the split bit standard ej from the pre-defined split bit standard cluster e∈(e1, e2...ep), j=1,2...p, and ej is an integer greater than one and less than u, that is, e1 is 2, and ep is u-2;

[0096] Here, in a preferred but non-limiting embodiment of the present invention, in step 2-4, the bit segmentation standard is the number, which is used to group the bits on the corresponding bits in each horizontal row according to the corresponding number in the bit stream arrangement library.

[0097] Step 2-5: Divide the bit stream arrangement library into a number of bit stream sub-clusters according to the selected segmentation bit standard ej;

[0098] Just as: if the selected ej is five and u is twelve, then the quotient of twelve and five is And put implement The operation obtains an integer value of three, which is the number of bitstream subclusters obtained.

[0099] Then the first bitstream subcluster is:

[0100] 10111‘

[0101] 10100‘

[0102] 00100‘

[0103] 00011‘

[0104] Then the corresponding bit stream sub-cluster is: 10010 10011 11110 0

[0109] Then the corresponding last bit stream subcluster is: 10 01 10

[0113] Step 2-6: Register the same identification code for the several bit stream sub-clusters corresponding to the active power of the target charging pile grid connection point, and form the value of the same identification code; the method of forming the value of the same identification code is set by oneself.

[0114] After the same identification code is registered, several bit stream sub-clusters are registered with serial numbers according to the arrangement sequence of the bit stream sub-clusters, and the value of the serial number is formed; the value of the serial number is increased by one from the beginning according to the arrangement sequence of the bit stream sub-clusters.

[0115] Step 2-7: Aggregate the same identification code value, serial number value, yk value and ej value to form a check mark;

[0116] The bit stream sub-clusters are registered using the same identification code value and serial number value to ensure that the charging pile grid active power can be accurately restored to the initial state when reconstructing the charging pile grid active power, reducing the defects of charging pile grid active power loss or disorder that often occur during transmission.

[0117] Step 2-8: According to the method of step 2-1 to step 2-8, the active power of all target charging piles and grid points is separated and processed, and a number of corresponding bit stream sub-clusters are obtained, and the same identification code and serial number are registered for them respectively, and the corresponding verification symbol is formed synchronously according to the corresponding same identification code value, serial number value, yk value, ej value and u value;

[0118] Here, in a preferred but non-limiting embodiment of the present invention, the value of the same identification code formed by the same identification code registration of each bitstream sub-cluster is unique.

[0119] By forming a calibration symbol and performing calibration when reconstructing the active power of the charging pile grid, the completeness and consistency of the active power of the charging pile grid can be checked, and it can be corrected in time.

[0120] Step 2-9: According to the number of bit stream sub-clusters corresponding to the active power of each destination charging pile grid connection point, select the value with the highest number of bit stream sub-clusters and register it as w, constructing w+1 information groups;

[0121] Send all calibration symbols corresponding to the active power of each target charging pile and grid point into one information group;

[0122] Each bit stream sub-cluster corresponding to the active power of each destination charging pile grid connection point is sent to the remaining w information groups respectively. Here, in the w information groups, one information group has only one bit stream sub-cluster corresponding to the active power of one destination charging pile grid connection point.

[0123] The information group is dynamically constructed according to the number of bit stream sub-clusters, making the active power transmission of charging piles and grid points faster, and the height and number of information groups can be changed according to requirements.

[0124] In a preferred but non-limiting embodiment of the present invention, after step 2, the method further comprises:

[0125] Step 3: Transmit the active power of the charging pile and grid connection point;

[0126] In a preferred but non-limiting embodiment of the present invention, in step 3, a plurality of information groups are transmitted to the grid coordination terminal through a plurality of channels respectively via the smart meters.

[0127] Step 4: The grid coordination terminal reconstructs the active power of the charging pile grid connection point.

[0128] In a preferred but non-limiting embodiment of the present invention, in step 4, a calibration symbol corresponding to the active power of each destination charging pile and grid point is selected from the corresponding information group;

[0129] Selecting a number of bit stream subclusters corresponding to the same identification code value in the check symbol;

[0130] Select the value of the sequence number in the check mark, and rearrange the corresponding selected bit stream sub-cluster, and re-construct the corresponding bit stream arrangement library;

[0131] Select yk from the checksum, and remove the bit on the corresponding bit according to the value of yk, select the bit on all bits according to the sequence of the bit stream arrangement library, and restore it to the original bit stream;

[0132] The value of the restored bit stream is regarded as the starting active power of the destination charging pile and grid connection point.

[0133] In a preferred but non-limiting embodiment of the present invention, step 4 further includes: under the condition of reconstructing the active power of the charging pile grid connection point, and selecting the corresponding check mark of the active power of each destination charging pile grid connection point in the corresponding information group, and selecting a number of bit stream sub-clusters corresponding to the value of the same identification code in the check mark:

[0134] Also select the ej value and u value in the collation symbol, and execute Get the calibration index of the bit stream sub-cluster corresponding to the active power of the target charging pile grid connection point, and compare the calibration index with the number of bit stream sub-clusters selected from several information groups according to the value of the same identification code:

[0135] If the two are the same, execute backward;

[0136] If the two are different, the corresponding bit stream sub-cluster is selected again, or the information group is transmitted again;

[0137] The present application compares the calibration index with the actual number of bit stream sub-clusters and can select or transmit the information group again when a difference is found, thereby improving the error correction function of the device.

[0138] In a preferred but non-limiting embodiment of the present invention, step 2 and step 3 further include:

[0139] Modulation treatment;

[0140] The method of modulation and treatment is:

[0141] Using LZ77 method to perform modulation on each information group;

[0142] Between step 3 and step 4 also include:

[0143] Demodulation and disposal;

[0144] The demodulation method is:

[0145] The grid coordination terminal demodulates the modulated information groups received by it via the LZ77 method and the corresponding demodulation method.

[0146] The modulation and demodulation processing of the present application further improves the reliability of transmitting the active power of the charging pile and the grid, ensuring that only authorized devices can read the active power of the charging pile and the grid.

[0147] like Figure 2 As shown, a power grid coordinated operation control device according to the present invention comprises:

[0148] The smart meter is connected to the grid coordination terminal for communication. The smart meter is used to collect the active power of the grid connection point of the charging pile connected to the grid and transmit it to the grid coordination terminal so that the grid coordination terminal obtains the active power of the grid connection point of the charging pile. The grid coordination terminal is used to finally determine the coordinated correction relationship of the power surplus and shortage between each reactive compensation sub-area based on the number and topological position of the charging piles connected to the grid, the capacity of the charging pile inverter, the active power of the grid connection point of the charging pile, the distance from each charging pile to the trunk line, and the distance between each node of the line, so as to perform reactive coordination on the regional distribution network; based on the number and topological position of the charging piles connected to the grid, the capacity of the charging pile inverter, the active power of the grid connection point of the charging pile, the distance from each charging pile to the trunk line, and the distance between each node of the line, the coordinated correction relationship of the power surplus and shortage between each reactive compensation sub-area is finally determined, so as to perform reactive coordination on the regional distribution network. The method can be achieved by the corresponding method in the prior art solution in the patent publication number 'CN114069730B', and the grid coordination terminal can be a computer or an industrial computer.

[0149] The modules running on the power grid coordinated operation control device include:

[0150] A collection module, which is used to collect the active power of the charging pile and grid connection point;

[0151] The processing module is used to process the active power of the charging pile grid point.

[0152] The beneficial effects of the present invention are that, compared with the prior art, the technical effects of the present invention include:

[0153] Improve the reliability of transmitting the active power of the charging pile and grid connection point: By using a binary encoder and confusion bit coefficients during the separation processing of the active power of the charging pile and grid connection point, the complexity of transmitting the active power of the charging pile and grid connection point is increased, making it difficult for unauthorized terminals to decipher and edit the active power of the charging pile and grid connection point.

[0154] Improve data completeness and accuracy: Use the same identification code value and serial number value to register the bit stream sub-clusters to ensure that the active power of the charging pile grid point can be accurately restored to the original state when reconstructing the active power of the charging pile grid point, reducing the defects of missing or disordered active power of the charging pile grid point that often occur during transmission.

[0155] Achieve active power calibration of charging piles and grids: By forming a calibration symbol and performing calibration when reconstructing the active power of the charging piles and grids, the completeness and consistency of the active power of the charging piles and grids can be verified, and errors can be detected and corrected in real time.

[0156] Flexible packet transmission: Dynamically construct packets based on the number of bitstream sub-clusters, allowing faster transmission of charging pile and grid active power, and the height and number of packets can be changed according to demand.

[0157] Good compatibility: This method is not limited to the specified device and can be widely used in the transmission of active power at various charging piles and grid points.

[0158] Good error correction function: By comparing the correction index with the actual number of bit stream sub-clusters, the information group can be selected or sent again when a discrepancy is found, thus improving the error correction function of the device.

[0159] Modulation and demodulation rules: Modulation processing and demodulation processing further improve the reliability of transmitting the active power of the charging pile and grid connection point, ensuring that only authorized devices can read the active power of the charging pile and grid connection point.

[0160] In summary, the present invention constitutes an integrated, reliable and fast grid coordinated operation control method, which not only improves the reliability and accuracy of transmitting the active power of the charging pile grid connection point, but also improves the completeness proofreading and error correction function of the active power of the charging pile grid connection point, and simultaneously improves the mobility and compatibility.

[0161] The present disclosure can be a system, a method and / or a computer program product. The computer program product can include a computer-readable storage medium carrying computer-readable program instructions for causing a processor to implement each aspect of the present disclosure.

[0162] A computer-readable storage medium can be a tangible device that can hold and store instructions for use by an instruction execution device. A computer-readable storage medium can be, but is not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the above. More specific examples (a non-exhaustive list) of computer-readable storage media include: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a static random access memory (SRAM), a portable compact disk read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, a mechanical encoding device, such as a punch card or a raised structure in a groove on which instructions are stored, and any suitable combination of the above. The computer-readable storage medium used herein is not to be interpreted as a transient signal itself, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagating through a waveguide or other transmission medium (such as a light pulse through a fiber optic cable), or an electrical signal transmitted through a wire.

[0163] The computer-readable program instructions described herein can be downloaded from a computer-readable storage medium to each computing / processing device, or downloaded to an external computer or external storage device via a network, such as the Internet, a local area network, a wide area network, and / or a wireless network. The network can include copper transmission cables, optical fiber transmission, wireless transmission, routers, firewalls, switches, gateway computers, and / or edge servers. The network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in a computer-readable storage medium in each computing / processing device.

[0164] The computer program instructions for performing the operations of the present disclosure can be assembler instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Smalltalk, C++, etc., and conventional procedural programming languages ​​such as 'C' language or similar programming languages. The computer-readable program instructions can be executed entirely on the controller computer, partially on the controller computer, as a separate software package, partially on the controller computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the controller computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (such as using an Internet service provider to connect through the Internet). In some embodiments, each aspect of the present disclosure is implemented by personalizing an electronic circuit by using state information of computer-readable program instructions, such as a programmable logic circuit, a field programmable gate array (FPGA) or a programmable logic array (PLA), which can execute computer-readable program instructions.

[0165] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be edited or replaced by equivalents, and any editing or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for controlling coordinated operation of a power grid, characterized in that: include: The smart meter collects the active power of the charging pile grid connection point connected to the power grid and transmits it to the power grid coordination terminal so that the power grid coordination terminal obtains the active power of the charging pile grid connection point. The power grid coordination terminal finally determines the coordinated correction relationship of the power surplus and shortage between each reactive compensation sub-area based on the number and topological position of the charging piles connected to the power grid, the capacity of the charging pile inverter, the active power of the charging pile grid connection point, the distance from each charging pile to the trunk line, and the distance between each node of the line, so as to coordinate the reactive power of the regional distribution network. The method for a smart meter to transmit active power of a charging pile grid connection point to a grid coordination terminal includes: Step 1: Collect the active power of the charging pile and grid connection point; Step 2: Process the active power of the charging pile grid connection point.

2. The method for controlling coordinated operation of a power grid according to claim 1, characterized in that: In step 1, the smart meter collects the active power of all charging pile grid points to be transmitted as the active power of the destination charging pile grid point.

3. The method for controlling coordinated operation of a power grid according to claim 2, characterized in that: In step 2, the active power of the target charging pile grid connection point is separated from the active power of the charging pile grid connection point, which includes: Step 2-1: Obtain the bit stream of active power of the target charging pile and grid connection point; Step 2-2: From the predefined supplementary selection cluster y∈(y1, y2...yu), select a supplementary selection quantity yk, k=1,2...u; In the predefined bit stream arrangement library, the corresponding bit is selected according to the value of yk, and the predefined confusion bit coefficient is added to all the vertical rows of the bit, and the value of the confusion bit coefficient is zero or one; Here, the predefined bit stream arrangement library is an array structure, u represents the number of vertical rows on the array structure, and all horizontal rows in the bit stream arrangement library are predefined with u bits; Step 2-3: Send the corresponding bit stream to each bit in the pre-defined bit stream arrangement library in sequence according to its sequence; Step 2-4: Select a split bit standard ej from the pre-defined split bit standard cluster e∈(e1, e2...ep), where j=1,2...p, and ej is an integer greater than one and less than u; Step 2-5: Divide the bit stream arrangement library into a number of bit stream sub-clusters according to the selected segmentation bit standard ej; Step 2-6: register the same identification code for the bit stream sub-clusters corresponding to the active power of the target charging pile grid connection point, and form the value of the same identification code; After the same identification code is registered, several bit stream sub-clusters are registered with serial numbers according to the arrangement sequence of the bit stream sub-clusters, and the values ​​of the serial numbers are formed; Step 2-7: Aggregate the same identification code value, serial number value, yk value and ej value to form a check mark; Step 2-8: According to the method of step 2-1 to step 2-8, the active power of all target charging piles and grid points is separated and processed, and a number of corresponding bit stream sub-clusters are obtained, and the same identification code and serial number are registered for them respectively, and the corresponding verification symbol is formed synchronously according to the corresponding same identification code value, serial number value, yk value, ej value and u value; Step 2-9: According to the number of bit stream sub-clusters corresponding to the active power of each destination charging pile grid connection point, select the value with the highest number of bit stream sub-clusters and register it as w, constructing w+1 information groups; Send all calibration symbols corresponding to the active power of each target charging pile and grid point into one information group; Each bit stream sub-cluster corresponding to the active power of each destination charging pile grid connection point is sent to the remaining w information groups respectively. Here, in the w information groups, one information group has only one bit stream sub-cluster corresponding to the active power of one destination charging pile grid connection point.

4. The method for controlling coordinated operation of a power grid according to claim 3, characterized in that: In step 2-3, when there is a garbled bit coefficient on a bit in the bit stream array, the bit arrayed on the bit is shifted back by 1 bit and sent to the next bit; In step 2-4, the bit segmentation standard is the number, which is used to group the bits on the corresponding bits in each horizontal row according to the corresponding number in the bit stream arrangement library.

5. The method for controlling coordinated operation of a power grid according to claim 4, characterized in that: The value of the same identification code formed by the same identification code registration of each bitstream sub-cluster is unique.

6. The method for controlling coordinated operation of a power grid according to claim 5, characterized in that: After step 2, it also includes: Step 3: Transmit the active power of the charging pile and grid connection point; Step 4: The grid coordination terminal reconstructs the active power of the charging pile grid connection point.

7. The method for controlling coordinated operation of a power grid according to claim 6, characterized in that: In step 3, a plurality of information groups are transmitted to the grid coordination terminal through a plurality of channels respectively via the smart meters.

8. The method for controlling coordinated operation of a power grid according to claim 7, characterized in that: In step 4, the calibration symbol corresponding to the active power of each destination charging pile and grid point is selected from the corresponding information group; Selecting a number of bit stream subclusters corresponding to the same identification code value in the check symbol; Select the value of the sequence number in the check mark, and rearrange the corresponding selected bit stream sub-cluster, and re-construct the corresponding bit stream arrangement library; Select yk from the checksum, and remove the bit on the corresponding bit according to the value of yk, select the bit on all bits according to the sequence of the bit stream arrangement library, and restore it to the original bit stream; The value of the restored bit stream is regarded as the starting active power of the destination charging pile and grid connection point.

9. The method for controlling coordinated operation of a power grid according to claim 8, characterized in that: Step 4 also includes: under the condition of reconstructing the active power of the charging pile grid connection point, selecting the corresponding check mark of each target charging pile grid connection point active power in the corresponding information group, and selecting a number of bit stream sub-clusters corresponding to the same identification code value in the check mark: Also select the ej value and u value in the collation symbol, and execute Get the calibration index of the bit stream sub-cluster corresponding to the active power of the target charging pile grid connection point, and compare the calibration index with the number of bit stream sub-clusters selected from several information groups according to the value of the same identification code: If the two are the same, execute backward; If the two are different, the corresponding bit stream sub-cluster is selected again, or the information group is transmitted again; Between step 2 and step 3 also include: Modulation treatment; The method of modulation and treatment is: Using LZ77 method to perform modulation on each information group; Between step 3 and step 4 also include: Demodulation and disposal; The demodulation method is: The grid coordination terminal demodulates the modulated information groups received by it via the LZ77 method and the corresponding demodulation method.

10. A power grid coordinated operation control device, characterized in that: include: The smart meter is connected to the grid coordination terminal for communication. The smart meter is used to collect the active power of the grid connection point of the charging pile connected to the grid and transmit it to the grid coordination terminal so that the grid coordination terminal can obtain the active power of the grid connection point of the charging pile. The grid coordination terminal is used to determine the coordinated correction relationship of the power surplus and shortage between each reactive compensation sub-area based on the number and topological position of the charging piles connected to the grid, the capacity of the charging pile inverter, the active power of the grid connection point of the charging pile, the distance from each charging pile to the trunk line, and the distance between each node of the line, so as to perform reactive coordination on the regional distribution network; The modules running on the power grid coordinated operation control device include: A collection module, which is used to collect the active power of the charging pile and grid connection point; The processing module is used to process the active power of the charging pile grid point.

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