Main grid and distribution network cooperative voltage regulation method and device, computer device and storage medium

Abstract

This invention discloses a method, apparatus, computer equipment, and storage medium for coordinated voltage regulation of the main and distribution networks, relating to the field of smart grids. It addresses the problem of insufficient accuracy in existing coordinated voltage regulation methods. The method includes: Step S1: acquiring information from the main power grid and distribution network; Step S2: classifying distribution network nodes to obtain consumer nodes and transmission nodes, analyzing the energy demand of the distribution network, transmitting energy based on the energy demand, calculating the actual voltage at the consumer nodes, calculating the voltage deviation value based on the rated voltage of the consumer nodes, and adjusting and optimizing the voltage of the transmission nodes; Step S3: statistically analyzing the energy demand of the distribution network, and controlling the voltage of the main power grid nodes based on the energy demand and the optimized voltage to obtain the control voltage; Step S4: performing coordinated voltage regulation of the main and distribution networks in the power system. This invention can effectively improve the accuracy of coordinated voltage regulation of the main and distribution networks.

Description

Technical Field

[0001] This invention belongs to the field of smart grids, and more specifically to the coordinated voltage regulation of the main and distribution networks, specifically the method, device, computer equipment and storage medium for coordinated voltage regulation of the main and distribution networks. Background Technology

[0002] The existing power grid system has the following specific defects when performing voltage regulation:

[0003] 1. Existing power grid systems typically regulate the voltage at the power source and transmit energy to the connected power terminals through the power supply voltage. This method is highly integrated and ignores the differences between different power terminals, resulting in different voltage states at different power terminals. Simply increasing or decreasing the power supply voltage cannot solve the power consumption problem at the power terminals.

[0004] 2. The existing power grid system usually focuses on power fluctuations when regulating voltage. The calculation of power fluctuations idealizes the energy transmission process, which fails to reflect the losses in line transmission, reduces the accuracy of voltage calculation, and makes the results of coordinated voltage regulation between the main and distribution networks have large errors.

[0005] To this end, we propose a method, device, computer equipment, and storage medium for coordinated voltage regulation of the main and distribution networks. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a method, device, computer equipment and storage medium for coordinated voltage regulation of main and distribution networks, and to improve the efficiency of coordinated voltage regulation of main and distribution networks.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a main and distribution network coordinated voltage regulation method, the specific working process of each step of which is as follows:

[0008] Step S1: Obtain the main power grid information and distribution network information. Based on the distribution network information, obtain the distribution network nodes and distribution network connection lines. Based on the main power grid information, obtain the main power grid nodes and main power grid connection lines.

[0009] Step S2: Based on the distribution network connection lines, classify the distribution network nodes to obtain power-consuming nodes and transmission-consuming nodes. Analyze the energy demand of the distribution network based on the power-consuming nodes. Based on the energy demand of the distribution network, the transmission-consuming nodes transmit energy to the power-consuming nodes to obtain the energy transmission volume. Calculate the actual voltage of the power-consuming nodes based on the energy transmission volume to obtain the rated voltage of the power-consuming nodes. Combine the actual voltage of the power-consuming nodes with the voltage deviation value to calculate the voltage deviation value. Adjust the voltage of the transmission-consuming nodes based on the voltage deviation value to optimize the distribution network voltage and obtain the optimized voltage.

[0010] Step S3: Energy is transmitted to the distribution network through the main grid nodes and the main grid connection lines. The energy demand of the distribution network is statistically analyzed. Based on the energy demand of the distribution network and combined with the optimized voltage, the voltage of the main grid nodes is controlled to obtain the control voltage.

[0011] Step S4: Based on the optimized voltage of the distribution network and the control voltage of the main grid, perform coordinated voltage regulation of the main and distribution networks in the power system.

[0012] Furthermore, the specific steps of step S2 are as follows:

[0013] Step S21: Obtain the energy transmission relationship of the distribution network nodes according to the distribution network connection lines. Based on the energy transmission relationship of the distribution network nodes, divide the distribution network nodes into power consumption nodes and transmission nodes. Obtain the energy demand of the power consumption nodes. Based on the energy demand of the power consumption nodes, perform statistical calculations on the energy demand of all power consumption nodes to obtain the energy transmission volume of the transmission nodes. Perform statistical calculations on the energy transmission volume of the transmission nodes to obtain the energy demand of the distribution network.

[0014] Step S22: Obtain the rated voltages of the transmission and consumption nodes. Based on the rated voltage of the transmission node, combined with the energy transmission capacity of the transmission node and the connection lines of the distribution network, calculate the actual voltage of the consumption node. Combine the actual voltage of the consumption node with its rated voltage to calculate the voltage deviation value of the consumption node. Based on the voltage deviation value of the consumption node, adjust the voltage of the transmission node and calculate the overall deviation change value. Obtain the voltage adjustment value of the transmission node based on the overall deviation change value. Optimize the distribution network voltage based on the voltage adjustment value to obtain the optimized voltage.

[0015] Furthermore, the specific steps of step S21 are as follows:

[0016] Step S211: Obtain the number of power consumption nodes in the distribution network, denoted as as; obtain the energy demand of each power consumption node based on the number of power consumption nodes in the distribution network, denoted as ynx(a); obtain the energy demand of the power consumption node at different time nodes based on the temporal changes of the energy demand of the power consumption node, denoted as ynx(a,t).

[0017] Step S212: Based on the energy demand ynx(a,t) of the power-consuming nodes at different time points, calculate the average energy demand of the power-consuming nodes to obtain the average demand xjz(a).

[0018] Based on the average demand xjz(a), and combined with the energy demand ynx(a,t) of the electricity-consuming nodes at different time points, the overall energy demand of the electricity-consuming nodes is evaluated to obtain the energy evaluation value npg(a).

[0019] ;

[0020] Where: ynx(a,t) is the energy demand of the electricity-consuming node at the next time node of ynx(a,t);

[0021] The transmission end node transmits energy to the power consumption end node based on the demand average xjz(a) and the energy assessment value npg(a) to obtain the energy transmission amount, which is denoted as ncs(a).

[0022] By statistically analyzing energy transmission volume, the energy demand of the distribution network can be obtained.

[0023] Furthermore, the specific steps of step S22 are as follows:

[0024] Step S221: Obtain the rated voltage of the transmission end node and denote it as pse; based on the rated voltage of the transmission end node and the energy transmission amount ncs(a), calculate the current flowing to the power consumption end node to obtain the transmission current jdl(a).

[0025] Based on the distribution network connection lines, the connection lines between the transmission end node and the power consumption end node are obtained. The reactance and resistance of the connection lines are measured. The reactance is denoted as pdk(a) and the resistance is denoted as pdz(a). The actual voltage sdy(a) of the power consumption end is calculated by combining the rated voltage pse and the transmission current jdl(a) of the transmission end node with the reactance and resistance.

[0026] ;

[0027] Obtain the rated voltage of the power-consuming node and denote it as yed(a). Calculate the voltage deviation value ypc(a) of the power-consuming node by comparing the actual voltage sdy(a) of the power-consuming node with the rated voltage yed(a).

[0028] Step S222: Statistically analyze the voltage deviation value ypc(a) of the power consumption node to obtain the overall deviation zpc; adjust the voltage of the transmission node based on the overall deviation, and denote the adjusted voltage as tzd; obtain the voltage deviation value of the power consumption node according to the adjusted voltage to obtain the adjustment deviation tpc(a, tzd), where tpc(a, tzd) represents the voltage deviation value of the a-th power consumption node after the voltage adjustment of the transmission node by tzd; calculate the overall deviation change value zbh(tzd) by combining the adjustment deviation with the overall deviation.

[0029] ;

[0030] The adjustment voltage tzd is iterated to extract the minimum overall deviation change value zbh(tzd). The voltage adjustment value is obtained from the adjustment voltage tzd corresponding to the minimum overall deviation change value zbh(tzd). The voltage of the distribution network is optimized based on the voltage adjustment value to obtain the optimized voltage.

[0031] Furthermore, the specific steps of step S3 are as follows:

[0032] Step S31: Obtain the connection lines between the main grid nodes and the main grid, transmit energy to the distribution network according to the connection lines between the main grid nodes and the main grid, and statistically analyze the energy demand of the distribution network on the connection lines to obtain the total capacity of the main grid nodes.

[0033] Step S32: Based on the total capacity of the main grid nodes, energy is transmitted to the distribution network. The voltage drop on the main grid lines is calculated in conjunction with the main grid connection lines. Based on the voltage drop and the optimized voltage of the distribution network, the voltage deviation of the distribution network is calculated. Based on the voltage deviation of the distribution network, the voltage of the main grid nodes is controlled to obtain the control voltage.

[0034] Furthermore, the specific steps of step S31 are as follows:

[0035] Step S311: Count the number of main grid nodes and record the number of main grid nodes as zs; count the number of distribution network nodes and record the number of distribution network nodes as ps; connect the main grid nodes to the distribution network according to the main grid connection lines, and measure the energy loss nch(z, p) of the connection lines.

[0036] The connection relationships between the main grid nodes and the distribution network are classified according to the energy loss nch(z,p). Based on the number of main grid nodes zs, the energy loss nch(z,p) is traversed to obtain the connection relationship between the main grid node and the distribution network with the minimum loss. Based on the connection relationship, energy is transmitted between the main grid nodes and the distribution network. The number of connected distribution networks ls is obtained by counting the number of connected distribution networks.

[0037] Step S312: Obtain the energy demand of the distribution network. Based on the energy demand of the distribution network, extract the energy demand of the connected distribution networks. Combined with the number of connected distribution networks, record the energy demand of each connected distribution network as lpx(l). Statistically calculate the energy demand of the connected distribution networks as lpx(l) to obtain the total capacity czl of the main grid nodes.

[0038] Furthermore, the specific steps of step S32 are as follows:

[0039] Step S321: Based on the total capacity of the main grid nodes, energy is transmitted to the distribution network to obtain the rated voltage of the main grid nodes, and the rated voltage of the main grid nodes is denoted as zed; combined with the total capacity of the main grid nodes, the current flowing through the main grid nodes is calculated to obtain the main node current zdl;

[0040] Obtain the connection lines between the main power grid node and the distribution network, obtain the resistance zdz and reactance zdk of the connection lines, and calculate the voltage drop zyj on the connection lines based on the main node current and the resistance zdz and reactance zdk of the connection lines.

[0041] The optimized voltage of the distribution network is obtained, and the voltage deviation of the distribution network is calculated by combining the voltage drop with the rated voltage zed of the main grid node, thus obtaining the distribution network voltage deviation ppc.

[0042] Step S322: Statistically analyze the voltage deviation of the distribution network connected to the main grid node to obtain the voltage deviation of the distribution network from ppc(1) to ppc(ps); obtain the adjustment range of the main node voltage, iterate the main node voltage according to the adjustment range of the main node voltage, and calculate the voltage deviation of the distribution network under different voltages, denoted as ppc'(1) to ppc'(ps); judge the main node voltage adjustment according to ppc'(1) to ppc'(ps) and ppc(1) to ppc(ps), when ppc'(1) to ppc'(ps) decreases as a whole, obtain the main node voltage adjustment value, and continue iterating with the main node voltage adjustment value as the base point to extract the final main node voltage adjustment value, control the main node voltage according to the main node voltage adjustment, and obtain the main grid control voltage.

[0043] Main and distribution network coordinated voltage regulation device, the voltage regulation device includes:

[0044] Information acquisition module: Acquires information from the main power grid and distribution network; based on the distribution network information, acquires the distribution network nodes and their connection lines; based on the main power grid information, acquires the main power grid nodes and their connection lines.

[0045] Distribution network processing module: Based on the distribution network connection lines, the distribution network nodes are classified into power consumption nodes and transmission nodes. The energy demand of the distribution network is analyzed based on the power consumption nodes. Based on the energy demand of the distribution network, the transmission nodes transmit energy to the power consumption nodes to obtain the energy transmission volume. The actual voltage of the power consumption nodes is calculated based on the energy transmission volume to obtain the rated voltage of the power consumption nodes. Combined with the actual voltage of the power consumption nodes, the voltage deviation value is calculated. Based on the voltage deviation value, the voltage of the transmission nodes is adjusted to optimize the distribution network voltage and obtain the optimized voltage.

[0046] Main grid processing module: transmits energy to the distribution network through the main grid nodes and the main grid connection lines, calculates the energy demand of the distribution network, and performs voltage control on the main grid nodes based on the energy demand of the distribution network and combined with voltage optimization to obtain the control voltage;

[0047] Main and distribution network coordination module: Based on the optimized voltage of the distribution network and the control voltage of the main grid, the main and distribution networks coordinate voltage regulation of the power system.

[0048] A computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor executes the computer program to implement the steps of the main distribution network coordinated voltage regulation method.

[0049] A computer-readable storage medium storing a computer program, characterized in that, when executed by a processor, the computer program implements the steps of the main and distribution network coordinated voltage regulation method.

[0050] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0051] 1. This invention analyzes the energy flow of the power grid system through multi-level classification, and processes the main power grid and distribution network of the power grid system independently. At the same time, the energy demand of the power consumption end is analyzed by dividing the distribution network into nodes. Based on the energy demand and the energy transmission route of the distribution network, the voltage drop is calculated to enhance the accuracy of local voltage calculation. Based on the local voltage, the voltage deviation is judged, and the overall voltage is optimized by iteratively analyzing the voltage at the transmission end to enhance the stability of the local voltage.

[0052] 2. This invention analyzes the resistance and reactance of transmission lines, calculates in detail the voltage changes during energy transmission, analyzes the voltage stability of multiple nodes through voltage changes, adjusts local voltages, and cycles from local voltages to overall voltages, making comprehensive adjustments from bottom to top, thereby improving the accuracy of coordinated voltage regulation of the main and distribution networks. Attached Figure Description

[0053] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0054] Figure 1 This is a schematic diagram of the method of the present invention;

[0055] Figure 2 This is a schematic diagram of the coordinated voltage regulation of the present invention. Detailed Implementation

[0056] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0057] Example 1

[0058] Please see Figure 1 The present invention provides a method for coordinated voltage regulation of main and distribution networks, including:

[0059] Step S1: Obtain the main power grid information and distribution network information. Based on the distribution network information, obtain the distribution network nodes and distribution network connection lines. Based on the main power grid information, obtain the main power grid nodes and main power grid connection lines.

[0060] It should be noted that the distribution network is the power network system in the power system that extends from the output of the step-down distribution substation (high-voltage distribution substation) to the user end. It is responsible for receiving electrical energy from the transmission network or regional power plants and then distributing it locally or in stages according to voltage to various users through distribution facilities.

[0061] The main power grid is the core part of the power system responsible for long-distance power transmission and centralized power supply, and usually refers to the transmission network between power plants and substations.

[0062] Step S2: Based on the distribution network connection lines, classify the distribution network nodes to obtain power-consuming nodes and transmission-consuming nodes. Analyze the energy demand of the distribution network based on the power-consuming nodes. Based on the energy demand of the distribution network, the transmission-consuming nodes transmit energy to the power-consuming nodes to obtain the energy transmission volume. Calculate the actual voltage of the power-consuming nodes based on the energy transmission volume to obtain the rated voltage of the power-consuming nodes. Combine the actual voltage of the power-consuming nodes with the voltage deviation value to calculate the voltage deviation value. Adjust the voltage of the transmission-consuming nodes based on the voltage deviation value to optimize the distribution network voltage and obtain the optimized voltage.

[0063] Step S21: Obtain the energy transmission relationship of the distribution network nodes according to the distribution network connection lines. Based on the energy transmission relationship of the distribution network nodes, divide the distribution network nodes into power consumption nodes and transmission nodes. Obtain the energy demand of the power consumption nodes. Based on the energy demand of the power consumption nodes, perform statistical calculations on the energy demand of all power consumption nodes to obtain the energy transmission volume of the transmission nodes. Perform statistical calculations on the energy transmission volume of the transmission nodes to obtain the energy demand of the distribution network.

[0064] Step S211: Obtain the number of power consumption nodes in the distribution network, denoted as as; obtain the energy demand of each power consumption node according to the number of power consumption nodes in the distribution network, denoted as ynx(a), where ynx(a) represents the energy demand of the a-th power consumption node; obtain the energy demand of the power consumption node at different time nodes according to the temporal changes of the energy demand of the power consumption node, denoted as ynx(a,t); ynx(a,t) represents the energy demand of the a-th power consumption node at the t-th time node; set the value of t to [1,ts];

[0065] Step S212: Based on the energy demand ynx(a,t) of the power-consuming nodes at different time points, calculate the average energy demand of the power-consuming nodes to obtain the average demand xjz(a).

[0066] ;

[0067] It should be noted that by using the average value, the representativeness of energy demand is improved, and extreme data can be prevented from affecting the calculation results.

[0068] Based on the average demand xjz(a), and combined with the energy demand ynx(a,t) of the electricity-consuming nodes at different time points, the overall energy demand of the electricity-consuming nodes is evaluated to obtain the energy evaluation value npg(a).

[0069] ;

[0070] Where: ynx(a,t) is the energy demand of the electricity-consuming node at the next time node of ynx(a,t);

[0071] It should be noted that: the energy assessment value is calculated based on the energy demand ynx(a,t) of the electricity-consuming node at different time points to assess the change in energy demand of the node, and combined with the average demand to assess the energy demand. The energy assessment value is used to supplement the energy demand and improve the accuracy of energy demand judgment.

[0072] The transmission end node transmits energy to the power consumption end node based on the average demand xjz(a) and the energy assessment value npg(a) to obtain the energy transmission amount, which is denoted as ncs(a), ncs(a) = xjz(a) + npg(a).

[0073] By statistically analyzing energy transmission volume, the energy demand of the distribution network can be obtained.

[0074] Step S22: Obtain the rated voltage of the transmission end node and the power consumption end node. Based on the rated voltage of the transmission end node, combined with the energy transmission capacity of the transmission end node and the connection line of the distribution network, calculate the actual voltage of the power consumption end node. Combine the actual voltage of the power consumption end node with the rated voltage of the power consumption end node to calculate the voltage deviation value of the power consumption end node. Based on the voltage deviation value of the power consumption end node, adjust the voltage of the transmission end node and calculate the overall deviation change value. Obtain the voltage adjustment value of the transmission end node based on the overall deviation change value. Optimize the distribution network voltage based on the voltage adjustment value to obtain the optimized voltage.

[0075] Step S221: Obtain the rated voltage of the transmission end node and denote it as pse; based on the rated voltage of the transmission end node and the energy transmission amount ncs(a), calculate the current flowing to the power consumption end node to obtain the transmission current jdl(a).

[0076] ;

[0077] Based on the distribution network connection lines, the connection lines between the transmission end node and the power consumption end node are obtained. The reactance and resistance of the connection lines are measured. The reactance is denoted as pdk(a) and the resistance is denoted as pdz(a). The actual voltage sdy(a) of the power consumption end is calculated by combining the rated voltage pse and the transmission current jdl(a) of the transmission end node with the reactance and resistance.

[0078] ;

[0079] Obtain the rated voltage of the power-consuming node and denote it as yed(a). Calculate the voltage deviation value ypc(a) of the power-consuming node by comparing the actual voltage sdy(a) of the power-consuming node with the rated voltage yed(a).

[0080] ;

[0081] Step S222: Statistically analyze the voltage deviation value ypc(a) of the power consumption node to obtain the overall deviation zpc; adjust the voltage of the transmission node based on the overall deviation, and denote the adjusted voltage as tzd; obtain the voltage deviation value of the power consumption node according to the adjusted voltage to obtain the adjustment deviation tpc(a, tzd), where tpc(a, tzd) represents the voltage deviation value of the a-th power consumption node after the voltage adjustment of the transmission node by tzd; calculate the overall deviation change value zbh(tzd) by combining the adjustment deviation with the overall deviation.

[0082] ;

[0083] It should be noted that by calculating the deviation and adjusting the existing data accordingly, the complexity of data adjustment is reduced and the accuracy of energy transmission is improved.

[0084] The adjustment voltage tzd is iterated to extract the minimum overall deviation change value zbh(tzd). The voltage adjustment value is obtained from the adjustment voltage tzd corresponding to the minimum overall deviation change value zbh(tzd). The voltage of the distribution network is optimized based on the voltage adjustment value to obtain the optimized voltage.

[0085] It should be noted that by independently calculating and analyzing the power demand of each power-consuming node, statistically analyzing the power demand of all power-consuming nodes, assessing the overall power demand, and making judgments based on the assessed data and the current transmission under the actual voltage, the voltage is optimized. This method reduces energy loss and improves energy utilization efficiency.

[0086] Step S3: Energy is transmitted to the distribution network through the main grid nodes and the main grid connection lines. The energy demand of the distribution network is statistically analyzed. Based on the energy demand of the distribution network and combined with the optimized voltage, the voltage of the main grid nodes is controlled to obtain the control voltage.

[0087] Please see Figure 2 Step S31: Obtain the connection lines between the main grid nodes and the main grid, transmit energy to the distribution network according to the connection lines between the main grid nodes and the main grid, and statistically analyze the energy demand of the distribution network on the connection lines to obtain the total capacity of the main grid nodes.

[0088] Step S311: Count the number of main grid nodes and record the number of main grid nodes as zs; count the number of distribution network nodes and record the number of distribution network nodes as ps; connect the main grid nodes to the distribution network according to the main grid connection lines, and measure the energy loss nch(z, p) of the connection lines. nch(z, p) represents the energy loss when energy flows from the z-th main node to the p-th distribution network.

[0089] The connection relationships between the main grid nodes and the distribution network are classified according to the energy loss nch(z,p). Based on the number of main grid nodes zs, the energy loss nch(z,p) is traversed to obtain the connection relationship between the main grid node and the distribution network with the minimum loss. Based on the connection relationship, energy is transmitted between the main grid nodes and the distribution network. The number of connected distribution networks ls is obtained by counting the number of connected distribution networks.

[0090] Step S312: Obtain the energy demand of the distribution network. Based on the energy demand of the distribution network, extract the energy demand of the connected distribution networks. Combined with the number of connected distribution networks, record the energy demand of each connected distribution network as lpx(l). Statistically calculate the energy demand of the connected distribution networks as lpx(l) to obtain the total capacity czl of the main grid nodes.

[0091] Step S32: Based on the total capacity of the main grid nodes, energy is transmitted to the distribution network. The voltage drop on the main grid lines is calculated in conjunction with the main grid connection lines. Based on the voltage drop and the optimized voltage of the distribution network, the voltage deviation of the distribution network is calculated. Based on the voltage deviation of the distribution network, the voltage of the main grid nodes is controlled to obtain the control voltage.

[0092] Step S321: Based on the total capacity of the main grid nodes, energy is transmitted to the distribution network to obtain the rated voltage of the main grid nodes, and the rated voltage of the main grid nodes is denoted as zed; combined with the total capacity of the main grid nodes czl, the current flowing through the main grid nodes is calculated to obtain the main node current zdl.

[0093] ;

[0094] Obtain the connection lines between the main power grid node and the distribution network, obtain the resistance zdz and reactance zdk of the connection lines, and calculate the voltage drop zyj on the connection lines based on the main node current and the resistance zdz and reactance zdk of the connection lines.

[0095] ;

[0096] The optimized voltage ydy of the distribution network is obtained, and the voltage deviation of the distribution network is calculated by combining the voltage drop zyj with the rated voltage zed of the main grid node, and the voltage deviation ppc of the distribution network is obtained.

[0097] ;

[0098] Step S322: Statistically analyze the voltage deviation of the distribution network connected to the main grid node to obtain the voltage deviation of the distribution network from ppc(1) to ppc(ps); obtain the adjustment range of the main node voltage, iterate the main node voltage according to the adjustment range of the main node voltage, and calculate the voltage deviation of the distribution network under different voltages, denoted as ppc'(1) to ppc'(ps); judge the main node voltage adjustment according to ppc'(1) to ppc'(ps) and ppc(1) to ppc(ps), when ppc'(1) to ppc'(ps) decreases as a whole, obtain the main node voltage adjustment value, and continue iterating with the main node voltage adjustment value as the base point to extract the final main node voltage adjustment value, control the main node voltage according to the main node voltage adjustment, and obtain the main grid control voltage.

[0099] It should be noted that the main power grid reuses energy based on the distribution network's energy transmission strategy to improve the uniformity of the entire circuit transmission system and ensure energy transmission efficiency.

[0100] Step S4: Based on the optimized voltage of the distribution network and the control voltage of the main grid, perform coordinated voltage regulation of the main and distribution networks in the power system.

[0101] Example 2

[0102] This invention discloses a main and distribution network coordinated voltage regulation device, including...

[0103] Information acquisition module: Acquires information from the main power grid and distribution network; based on the distribution network information, acquires the distribution network nodes and their connection lines; based on the main power grid information, acquires the main power grid nodes and their connection lines.

[0104] Distribution network processing module: Based on the distribution network connection lines, the distribution network nodes are classified into power consumption nodes and transmission nodes. The energy demand of the distribution network is analyzed based on the power consumption nodes. Based on the energy demand of the distribution network, the transmission nodes transmit energy to the power consumption nodes to obtain the energy transmission volume. The actual voltage of the power consumption nodes is calculated based on the energy transmission volume to obtain the rated voltage of the power consumption nodes. Combined with the actual voltage of the power consumption nodes, the voltage deviation value is calculated. Based on the voltage deviation value, the voltage of the transmission nodes is adjusted to optimize the distribution network voltage and obtain the optimized voltage.

[0105] Main grid processing module: transmits energy to the distribution network through the main grid nodes and the main grid connection lines, calculates the energy demand of the distribution network, and performs voltage control on the main grid nodes based on the energy demand of the distribution network and combined with voltage optimization to obtain the control voltage;

[0106] Main and distribution network coordination module: Based on the optimized voltage of the distribution network and the control voltage of the main grid, the main and distribution networks coordinate voltage regulation of the power system.

[0107] Example 3

[0108] This application provides a computer device, including a processor and a memory. The memory stores computer-readable instructions. When the computer-readable instructions are executed by the processor, the steps in any of the methods described above are performed. Through the above technical solution, the processor and memory are interconnected and communicate with each other via a communication bus and / or other forms of connection mechanisms (not shown). The memory stores a computer program executable by the processor. When the electronic device is running, the processor executes the computer program to perform the method in any optional implementation of the above embodiments, thereby achieving the following functions: acquiring main grid information and distribution network information; classifying distribution network nodes according to the distribution network information to obtain power-consuming nodes and transmission-consuming nodes; analyzing the energy demand of the distribution network; transmitting energy based on the energy demand of the distribution network; calculating the actual voltage of the power-consuming nodes based on the energy transmission volume; calculating the voltage deviation value in conjunction with the rated voltage of the power-consuming nodes; and adjusting and optimizing the voltage of the transmission-consuming nodes; statistically analyzing the energy demand of the distribution network; controlling the voltage of the main grid nodes based on the energy demand of the distribution network and the optimized voltage to obtain the control voltage; and performing coordinated voltage regulation of the main and distribution networks of the power system based on the optimized voltage of the distribution network and the control voltage of the main grid.

[0109] Example 4

[0110] This application provides a computer storage medium storing a computer program thereon. When the computer program is executed by a processor, it performs the steps of any of the methods described above. Through the above technical solution, when the computer program is executed by a processor, it performs the method in any optional implementation of the above embodiments to achieve the following functions: acquiring main grid information and distribution network information; classifying distribution network nodes according to the distribution network information to obtain power-consuming nodes and transmission-consuming nodes; analyzing the energy demand of the distribution network; transmitting energy based on the energy demand of the distribution network; calculating the actual voltage of the power-consuming nodes based on the energy transmission volume; calculating the voltage deviation value in conjunction with the rated voltage of the power-consuming nodes; and adjusting and optimizing the voltage of the transmission-consuming nodes; statistically analyzing the energy demand of the distribution network; controlling the voltage of the main grid nodes based on the energy demand of the distribution network and the optimized voltage to obtain the control voltage; and performing coordinated voltage regulation of the main and distribution networks of the power system based on the optimized voltage of the distribution network and the control voltage of the main grid.

[0111] This invention proposes a method for coordinated voltage regulation between the main and distribution networks. It first performs refined modeling and voltage regulation within the distribution network, and then coordinates the control of the main grid based on the distribution network optimization results. Specifically, by classifying distribution network nodes into power consumption ends and transmission ends, the energy demand at the power consumption ends is analyzed (considering time-series changes and demand assessment). The actual voltage and deviation are calculated by combining line impedance, and the transmission end voltage is iteratively adjusted to minimize the overall deviation, resulting in the optimized voltage of the distribution network. Furthermore, the energy demand of the distribution network is statistically analyzed, and iterative voltage control of the main grid nodes is performed based on the optimized voltage, ultimately achieving coordinated voltage regulation between the main and distribution networks. Based on the above innovations, this invention has the following characteristics and effects:

[0112] 1. Improve the accuracy of local voltage control in the power distribution network: By classifying power-consuming nodes and analyzing demand, and combining line impedance to calculate the actual voltage, the problem of ignoring node differences and line losses in traditional methods is avoided, making voltage regulation more realistic.

[0113] 2. Optimize the overall voltage quality of the distribution network: Based on the voltage deviation value, the voltage at the transmission end is iteratively adjusted to minimize the overall deviation, which effectively improves the voltage stability of each node in the distribution network.

[0114] 3. Achieve precise voltage regulation in coordination between the main grid and distribution network: Based on the optimization of the distribution network, and taking into account the connection relationship between the main grid and the distribution network, line losses and voltage drops, iterative control is performed on the voltage of the main grid nodes to ensure the voltage coordination and operating efficiency of the overall grid.

[0115] 4. Enhance the adaptability and reliability of voltage regulation strategy: The hierarchical voltage regulation strategy from local to overall considers factors such as resistance and reactance in the actual transmission process, which improves the accuracy and robustness of voltage regulation.

[0116] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A method for coordinated voltage regulation of main and distribution networks, characterized in that, include: Step S1: Obtain the main power grid information and distribution network information. Based on the distribution network information, obtain the distribution network nodes and distribution network connection lines. Based on the main power grid information, obtain the main power grid nodes and main power grid connection lines. Step S2: Based on the distribution network connection lines, classify the distribution network nodes to obtain power-consuming nodes and transmission-consuming nodes. Analyze the energy demand of the distribution network based on the power-consuming nodes. Based on the energy demand of the distribution network, the transmission-consuming nodes transmit energy to the power-consuming nodes to obtain the energy transmission volume. Calculate the actual voltage of the power-consuming nodes based on the energy transmission volume to obtain the rated voltage of the power-consuming nodes. Combine the actual voltage of the power-consuming nodes with the voltage deviation value to calculate the voltage deviation value. Adjust the voltage of the transmission-consuming nodes based on the voltage deviation value to optimize the distribution network voltage and obtain the optimized voltage. Step S3: Energy is transmitted to the distribution network through the main grid nodes and the main grid connection lines. The energy demand of the distribution network is statistically analyzed. Based on the energy demand of the distribution network and combined with the optimized voltage, the voltage of the main grid nodes is controlled to obtain the control voltage. Step S4: Based on the optimized voltage of the distribution network and the control voltage of the main grid, perform coordinated voltage regulation of the main and distribution networks in the power system.

2. The main and distribution network coordinated voltage regulation method according to claim 1, characterized in that, The specific steps of step S2 are as follows: Step S21: Obtain the energy transmission relationship of the distribution network nodes according to the distribution network connection lines. Based on the energy transmission relationship of the distribution network nodes, divide the distribution network nodes into power consumption nodes and transmission nodes. Obtain the energy demand of the power consumption nodes. Based on the energy demand of the power consumption nodes, perform statistical calculations on the energy demand of all power consumption nodes to obtain the energy transmission volume of the transmission nodes. Perform statistical calculations on the energy transmission volume of the transmission nodes to obtain the energy demand of the distribution network. Step S22: Obtain the rated voltages of the transmission and consumption nodes. Based on the rated voltage of the transmission node, combined with the energy transmission capacity of the transmission node and the connection lines of the distribution network, calculate the actual voltage of the consumption node. Combine the actual voltage of the consumption node with its rated voltage to calculate the voltage deviation value of the consumption node. Based on the voltage deviation value of the consumption node, adjust the voltage of the transmission node and calculate the overall deviation change value. Obtain the voltage adjustment value of the transmission node based on the overall deviation change value. Optimize the distribution network voltage based on the voltage adjustment value to obtain the optimized voltage.

3. The main and distribution network coordinated voltage regulation method according to claim 2, characterized in that, The specific steps of step S21 are as follows: Step S211: Obtain the number of power consumption nodes in the distribution network, denoted as as; obtain the energy demand of each power consumption node based on the number of power consumption nodes in the distribution network, denoted as ynx(a); obtain the energy demand of the power consumption node at different time nodes based on the temporal changes of the energy demand of the power consumption node, denoted as ynx(a,t). Step S212: Based on the energy demand ynx(a,t) of the power-consuming nodes at different time points, calculate the average energy demand of the power-consuming nodes to obtain the average demand xjz(a). Based on the average demand xjz(a), and combined with the energy demand ynx(a,t) of the electricity-consuming nodes at different time points, the overall energy demand of the electricity-consuming nodes is evaluated to obtain the energy evaluation value npg(a). ； Where: ynx(a,t) is the energy demand of the electricity-consuming node at the next time node of ynx(a,t); The transmission end node transmits energy to the power consumption end node based on the demand average xjz(a) and the energy assessment value npg(a) to obtain the energy transmission amount, which is denoted as ncs(a). By statistically analyzing energy transmission volume, the energy demand of the distribution network can be obtained.

4. The main and distribution network coordinated voltage regulation method according to claim 2, characterized in that, The specific steps of step S22 are as follows: Step S221: Obtain the rated voltage of the transmission end node and denote it as pse; based on the rated voltage of the transmission end node and the energy transmission amount ncs(a), calculate the current flowing to the power consumption end node to obtain the transmission current jdl(a). Based on the distribution network connection lines, the connection lines between the transmission end node and the power consumption end node are obtained. The reactance and resistance of the connection lines are measured. The reactance is denoted as pdk(a) and the resistance is denoted as pdz(a). The actual voltage sdy(a) of the power consumption end is calculated by combining the rated voltage pse and the transmission current jdl(a) of the transmission end node with the reactance and resistance. ； Obtain the rated voltage of the power-consuming node and denote it as yed(a). Calculate the voltage deviation value ypc(a) of the power-consuming node by comparing the actual voltage sdy(a) of the power-consuming node with the rated voltage yed(a). ； Step S222: Statistically analyze the voltage deviation value ypc(a) of the power consumption node to obtain the overall deviation zpc; adjust the voltage of the transmission node based on the overall deviation, and denote the adjusted voltage as tzd; obtain the voltage deviation value of the power consumption node according to the adjusted voltage to obtain the adjustment deviation tpc(a, tzd), where tpc(a, tzd) represents the voltage deviation value of the a-th power consumption node after the voltage adjustment of the transmission node by tzd; calculate the overall deviation change value zbh(tzd) by combining the adjustment deviation with the overall deviation. ； The adjustment voltage tzd is iterated to extract the minimum overall deviation change value zbh(tzd). The voltage adjustment value is obtained from the adjustment voltage tzd corresponding to the minimum overall deviation change value zbh(tzd). The voltage of the distribution network is optimized based on the voltage adjustment value to obtain the optimized voltage.

5. The main distribution network coordinated voltage regulation method according to claim 1, characterized in that, The specific steps of step S3 are as follows: Step S31: Obtain the connection lines between the main grid nodes and the main grid, transmit energy to the distribution network according to the connection lines between the main grid nodes and the main grid, and statistically analyze the energy demand of the distribution network on the connection lines to obtain the total capacity of the main grid nodes. Step S32: Based on the total capacity of the main grid nodes, energy is transmitted to the distribution network. The voltage drop on the main grid lines is calculated in conjunction with the main grid connection lines. Based on the voltage drop and the optimized voltage of the distribution network, the voltage deviation of the distribution network is calculated. Based on the voltage deviation of the distribution network, the voltage of the main grid nodes is controlled to obtain the control voltage.

6. The main and distribution network coordinated voltage regulation method according to claim 5, characterized in that, The specific steps of step S31 are as follows: Step S311: Count the number of main grid nodes and record the number of main grid nodes as zs; Count the number of distribution network nodes and record the number of distribution network nodes as ps; Based on the main power grid connection lines, connect the main power grid nodes to the distribution network and measure the energy loss nch(z,p) of the connection lines. The connection relationships between the main grid nodes and the distribution network are classified according to the energy loss nch(z,p). Based on the number of main grid nodes zs, the energy loss nch(z,p) is traversed to obtain the connection relationship between the main grid node and the distribution network with the minimum loss. Based on the connection relationship, energy is transmitted between the main grid nodes and the distribution network. The number of connected distribution networks ls is obtained by counting the number of connected distribution networks. Step S312: Obtain the energy demand of the distribution network. Based on the energy demand of the distribution network, extract the energy demand of the connected distribution networks. Combined with the number of connected distribution networks, record the energy demand of each connected distribution network as lpx(l). Statistically calculate the energy demand of the connected distribution networks as lpx(l) to obtain the total capacity czl of the main grid nodes.

7. The main and distribution network coordinated voltage regulation method according to claim 5, characterized in that, The specific steps of step S32 are as follows: Step S321: Based on the total capacity of the main grid nodes, energy is transmitted to the distribution network to obtain the rated voltage of the main grid nodes, and the rated voltage of the main grid nodes is denoted as zed; Based on the total capacity of the main grid nodes, the current flowing through the main grid nodes is calculated to obtain the main node current zdl; Obtain the connection lines between the main power grid node and the distribution network, obtain the resistance zdz and reactance zdk of the connection lines, and calculate the voltage drop zyj on the connection lines based on the main node current and the resistance zdz and reactance zdk of the connection lines. The optimized voltage ydy of the distribution network is obtained, and the voltage deviation of the distribution network is calculated by combining the voltage drop zyj with the rated voltage zed of the main grid node, and the voltage deviation ppc of the distribution network is obtained. ； Step S322: Statistically analyze the voltage deviation of the distribution network connected to the main grid node to obtain the voltage deviation of the distribution network from ppc(1) to ppc(ps); obtain the adjustment range of the main node voltage, iterate the main node voltage according to the adjustment range of the main node voltage, calculate the voltage deviation of the distribution network under different voltages, and record it as ppc'(1) to ppc'(ps); judge the main node voltage adjustment according to ppc'(1) to ppc'(ps) and ppc(1) to ppc(ps), when ppc'(1) to ppc'(ps) decreases as a whole, obtain the main node voltage adjustment value, and continue iterating with the main node voltage adjustment value as the base point to extract the final main node voltage adjustment value, control the main node voltage according to the main node voltage adjustment, and obtain the main grid control voltage.

8. A main and distribution network coordinated voltage regulation device, applicable to the main and distribution network coordinated voltage regulation method according to any one of claims 1-7, characterized in that, The voltage regulating device includes: Information acquisition module: Acquires information from the main power grid and distribution network; based on the distribution network information, acquires the distribution network nodes and their connection lines; based on the main power grid information, acquires the main power grid nodes and their connection lines. Distribution network processing module: Based on the distribution network connection lines, the distribution network nodes are classified into power consumption nodes and transmission nodes. The energy demand of the distribution network is analyzed based on the power consumption nodes. Based on the energy demand of the distribution network, the transmission nodes transmit energy to the power consumption nodes to obtain the energy transmission volume. The actual voltage of the power consumption nodes is calculated based on the energy transmission volume to obtain the rated voltage of the power consumption nodes. Combined with the actual voltage of the power consumption nodes, the voltage deviation value is calculated. Based on the voltage deviation value, the voltage of the transmission nodes is adjusted to optimize the distribution network voltage and obtain the optimized voltage. Main grid processing module: transmits energy to the distribution network through the main grid nodes and the main grid connection lines, calculates the energy demand of the distribution network, and performs voltage control on the main grid nodes based on the energy demand of the distribution network and combined with voltage optimization to obtain the control voltage; Main and distribution network coordination module: Based on the optimized voltage of the distribution network and the control voltage of the main grid, the main and distribution networks coordinate voltage regulation of the power system.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the main distribution network coordinated voltage regulation method as described in any one of claims 1-7.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the main distribution network coordinated voltage regulation method as described in any one of claims 1-7.

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