Power distribution network planning and operation combined integrated optimization method

Abstract

The invention relates to the technical field of power optimization, and discloses a power distribution network planning and operation joint integrated optimization method. Comprising the steps of constructing a combined power distribution network, collecting comprehensive operation parameters, calculating an operation reliability coefficient, identifying an operation state of the combined power distribution network, comparing the comprehensive operation parameters with corresponding overrun standard values, identifying optimization parameters from the comprehensive operation parameters, and making an optimization instruction according to the optimization parameters. Compared with the prior art, the method has the advantages that the independent power distribution sub-networks can be associated together to construct the planning and operation integrated combined power distribution network, the operation reliability of the combined power distribution network can be accurately evaluated and judged, and meanwhile, corresponding optimization instructions are formulated in a targeted manner according to abnormal phenomena, so that the operation reliability of the combined power distribution network is improved. It is ensured that the running state of the combined power distribution network can be in a safe and stable state, the phenomenon of serious faults of the combined power distribution network is avoided, and then the optimization effect of power distribution network planning and running combination integration is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of power optimization, and more specifically, to a method for joint integrated optimization of distribution network planning and operation. Background Art

[0002] As an important part of the power system, the planning and operation of the distribution network directly affects the reliability, economy and safety of power supply. In recent years, the rise of smart grid technology has provided new opportunities for the optimization of distribution networks. By introducing advanced information and communication technologies and automation equipment, smart distribution networks can achieve real-time monitoring and data analysis, thereby improving their ability to respond to power demand.

[0003] The patent application with reference publication number CN115632405A discloses an integrated planning optimization method for a power system considering incentive-based demand response, which embeds the demand response mechanism into the power system source-grid-load-storage collaborative planning model to form an integrated planning model for a power system considering incentive-based demand response, which can effectively evaluate the flexibility and response potential of the demand side and take into account the impact of the response mechanism on power grid planning, reduce the investment cost of the power grid, and provide technical support for power system planning issues with the participation of demand response resources;

[0004] The existing distribution network planning and operation optimization method calculates the operation reliability of each distribution subgrid by collecting the operation parameters of each distribution subgrid respectively, and evaluates the overall reliability of the distribution network by analyzing the operation reliability of the distribution subgrid. This optimization method will lead to the problem of data independence between each distribution subgrid, making the allocation of various resources in the distribution network unreasonable, and thus making it impossible to evaluate and optimize the operation status of the distribution network from the overall macro perspective of planning and operation, reducing the safety and reliability of the distribution network system.

[0005] In view of this, the present invention proposes a distribution network planning and operation joint integrated optimization method to solve the above problems. Summary of the invention

[0006] In order to overcome the above-mentioned defects of the prior art and to achieve the above-mentioned purpose, the present invention provides the following technical solution: a distribution network planning and operation joint integrated optimization method, applied to a distribution network management and control platform, comprising:

[0007] S1: Obtain the planning strategy of the distribution network, extract planning features from the planning strategy, and construct a joint distribution network. The planning features include load characteristics, line characteristics, and cycle characteristics;

[0008] S2: Collect the comprehensive operating parameters of the joint distribution network in operation, and calculate the operation reliability coefficient based on the comprehensive operating parameters, the comprehensive operating parameters include the defense trigger frequency, the load shortage ratio and the effective response ratio;

[0009] S3: Compare the operation reliability coefficient with the preset operation reliability threshold, identify the operation status of the joint distribution network, and determine whether to switch the joint optimization mode; if the joint optimization mode is switched, execute S4; if the joint optimization mode is not switched, repeat S2-S3;

[0010] S4: comparing the comprehensive operating parameters with the corresponding over-limit standard values, and identifying the optimization parameters from the comprehensive operating parameters according to the comparison results;

[0011] S5: Develop optimization instructions according to the optimization parameters, and execute the optimization instructions in an orderly manner based on the execution priority.

[0012] Furthermore, the method for extracting load characteristics, line characteristics and cycle characteristics includes:

[0013] The planning data packets of i distribution sub-grids are respectively queried from the distribution network management and control platform, and the i planning data packets are split into c sub-data packets one by one;

[0014] Identify the remark words of the c sub-data packets one by one, record the sub-data packets whose remark words are strategies as planning strategies, and obtain i planning strategies;

[0015] The key semantics of each planning strategy are identified one by one through natural language processing technology, and the keywords in the key semantics are marked;

[0016] Record load, usage and supply as load standard words, and record the key semantics of the keyword containing the load standard word as load feature, and obtain i load features;

[0017] The line, path and distribution are recorded as line standard words, and the key semantics of the keywords containing the line standard words are recorded as line features, and i line features are obtained;

[0018] The period, duration and time are recorded as the period standard words, and the key semantics of the keyword containing the period standard words are recorded as the period feature, and i period features are obtained.

[0019] Furthermore, the method for constructing a joint distribution network includes:

[0020] The average failure rate of i distribution sub-grids in a statistical period is queried one by one through the database to obtain i average failure rates;

[0021] Arrange i distribution subgrids in order according to the average failure rate from small to large, and establish an associated channel between two adjacent distribution subgrids to generate an initial distribution network;

[0022] Three independent parameter boxes are constructed at the parameter end of the initial distribution network, which are denoted as load parameter box, line parameter box and cycle parameter box;

[0023] Aggregate i load characteristics, i line characteristics and i cycle characteristics respectively to form a load parameter package, a line parameter package and a cycle parameter package;

[0024] The load parameter package, line parameter package and cycle parameter package are respectively imported into the load parameter box, line parameter box and cycle parameter box of the initial distribution network to construct a joint distribution network.

[0025] Furthermore, the method for obtaining the defense trigger frequency includes:

[0026] The time when the joint distribution network first generates an access log is queried through the timestamp and recorded as the starting time;

[0027] When no access log is generated within the preset time, the time when the last access log is generated is recorded as the end time;

[0028] The duration between the start time and the end time is recorded as the security defense duration, and all access logs within the security defense duration are counted to obtain k access logs;

[0029] Mark the generation time of k access logs one by one, and select k security defense logs corresponding to the generation time of the k access logs from the security defense system;

[0030] Query the defense status of k security defense logs one by one, and record the security defense logs whose defense status is triggered as security trigger logs;

[0031] Count the number of security trigger logs, and compare the number of security trigger logs with the security defense duration to obtain the defense trigger frequency;

[0032] The expression for defense trigger frequency is:

[0033]

[0034] In the formula, FY cf To defend the trigger frequency, SL cf is the number of security trigger logs, SC fy For safety defense duration.

[0035] Furthermore, the method for obtaining the load shortage ratio value includes:

[0036] Mark the load users on the m power supply lines in the joint distribution network one by one to obtain m power load terminals;

[0037] The n historical loads of the m power load terminals are queried one by one through the load management system, and the load moments corresponding to the n historical loads are marked one by one to obtain the n load moments;

[0038] The power supply loads of the output ends of the m power supply lines at the n load moments are sequentially queried through the technical parameter table to obtain the n output loads;

[0039] Compare the n output loads with the n historical loads one by one, record the output load that is smaller than the historical load as the target load, and count the number of target loads on the m power supply lines to obtain m load quantity values;

[0040] The power supply lines where the load quantity value is greater than half of the total historical load value are recorded as load shortage lines, and the number of load shortage lines is counted;

[0041] Compare the number of load shortage lines with the number of power supply lines to obtain a load shortage ratio value;

[0042] The expression of load shortage ratio is:

[0043]

[0044] Where FH dq is the load shortage ratio, SL dq is the number of load shortage lines, and m is the number of power supply lines.

[0045] Furthermore, the method for obtaining the effective response ratio includes:

[0046] A1: At the same time, the distribution network control platform inputs response test instructions to m power supply lines respectively;

[0047] A2: After a preset response cycle, the processed response test instructions are received at the power load ends of the m power supply lines respectively, and the attribute status of the processed response test instructions is marked;

[0048] A3: Record the processed response test instruction whose attribute status is processed as a valid response instruction, and record the power supply line corresponding to the valid response instruction as a valid line;

[0049] A4: Count the number of effective lines, and compare the number of effective lines with the number of power supply lines to obtain a sub-ratio value;

[0050] A5: Repeat the above steps A1-A4 W times to obtain W sub-proportion values;

[0051] The expression of the sub-ratio value is:

[0052]

[0053] In the formula, ZB zw is the w-th sub-proportion value, SL yxw is the number of w-th valid lines;

[0054] A6: Add up the W sub-proportion values ​​one by one and calculate the average to obtain the effective response proportion value;

[0055] The expression of the effective response ratio is:

[0056]

[0057] In the formula, YX xy is the effective response ratio, ZB za is the a-th sub-proportion value.

[0058] Furthermore, the expression of the operating reliability coefficient is:

[0059]

[0060] In the formula, KK XS is the operational reliability factor, σ 1 , σ z , σ 3 is a weight factor greater than 0;

[0061] The operating status includes normal status and abnormal status;

[0062] The identification methods of normal state and abnormal state include:

[0063] The operating reliability factor KK xs Compared with the preset operation reliability threshold KK yz Compare;

[0064] When KK xs Greater than or equal to KK yz When the power distribution network is in normal state, the operation state of the combined power distribution network is identified as normal state;

[0065] When KK XS Smaller than KK yz When the operating state of the combined distribution network is identified as an abnormal state.

[0066] Furthermore, the method for determining whether to switch the joint optimization mode includes:

[0067] When the operation state of the joint distribution network is normal, it is determined not to switch to the joint optimization mode;

[0068] When the operating state of the joint distribution network is abnormal, it is determined to switch to the joint optimization mode.

[0069] Further, the identification method of the optimization parameters includes:

[0070] Subtract the defense trigger frequency from the preset defense trigger standard value, and compare it with the defense trigger frequency to obtain the defense trigger over-limit value;

[0071] The expression of the defense trigger over-limit value is:

[0072]

[0073] In the formula, FY CX To prevent triggering of over-limit value, FY bz It is the preset defense trigger standard value;

[0074] When the defense triggering over-limit value is greater than the defense over-limit standard value, the defense triggering frequency is identified as an optimization parameter;

[0075] The load shortage ratio value is subtracted from the preset load shortage standard value, and then compared with the load shortage ratio value to obtain the load shortage excess value;

[0076] The expression of load shortage exceeding limit is:

[0077]

[0078] Where FH CX FH is the load shortage exceeding limit value. bz is the preset load shortage standard value;

[0079] When the load shortage excess value is greater than the load excess standard value, the load shortage ratio value is identified as an optimization parameter;

[0080] Subtract the effective response ratio from the preset effective response standard value, and compare it with the effective response ratio to obtain the effective response over-limit value;

[0081] The expression of effective response over-limit value is:

[0082]

[0083] In the formula, YX CX To effectively respond to the limit value, YX bz is the preset effective response standard value;

[0084] When the effective response excess value is less than the effective excess standard value, the effective response proportion value is identified as the optimization parameter.

[0085] Furthermore, the optimization instructions include instructions for reducing the defense trigger frequency, instructions for reducing the load shortage ratio, and instructions for increasing the effective response ratio;

[0086] The method for formulating the instruction to reduce the defense trigger frequency, the instruction to reduce the load shortage ratio, and the instruction to increase the effective response ratio includes:

[0087] When the optimization parameter is the defense trigger frequency, an instruction to reduce the defense trigger frequency is formulated;

[0088] When the optimization parameter is the load shortage ratio, an instruction to reduce the load shortage ratio is formulated;

[0089] When the optimization parameter is the effective response ratio, an instruction to increase the effective response ratio is formulated;

[0090] The execution priorities are: the instruction to reduce the defense trigger frequency has the first priority, the instruction to reduce the load shortage ratio has the second priority, and the instruction to increase the effective response ratio has the third priority.

[0091] The technical effects and advantages of the combined integrated optimization method for distribution network planning and operation of the present invention are as follows:

[0092] The present invention obtains the planning strategy of the distribution network, extracts the planning features from the planning strategy, constructs a joint distribution network, collects the comprehensive operating parameters of the joint distribution network in operation, and calculates the operation reliability coefficient based on the comprehensive operating parameters, compares the operation reliability coefficient with a preset operation reliability threshold, identifies the operation state of the joint distribution network, and determines whether to switch to a joint optimization mode, compares the comprehensive operating parameters with corresponding over-limit standard values, and identifies the optimization parameters from the comprehensive operating parameters according to the comparison results, formulates optimization instructions according to the optimization parameters, and executes the optimization instructions in order based on the execution priority; compared with the prior art, by extracting the planning features of the distribution network, It can link various independent distribution subgrids together to form an integrated system architecture, construct a joint distribution network with integrated planning and operation, and by collecting the comprehensive operating parameters of the joint distribution network, it can accurately calculate the operating reliability coefficient, so as to accurately evaluate and judge the operating reliability of the joint distribution network, and can timely and accurately discover abnormal phenomena in the joint distribution network. At the same time, it can formulate corresponding optimization instructions based on the abnormal phenomena to ensure that the operating status of the joint distribution network can be in a safe and stable state, avoid serious faults in the joint distribution network, and thus achieve the optimization effect of the joint integration of distribution network planning and operation, and effectively ensure the safety and reliability of the distribution network system. BRIEF DESCRIPTION OF THE DRAWINGS

[0093] Figure 1A schematic diagram of a flow chart of a distribution network planning and operation joint integrated optimization method provided in the first embodiment of the present invention;

[0094] Figure 2 A schematic diagram of a distribution network planning and operation joint integrated optimization system provided in Embodiment 2 of the present invention. DETAILED DESCRIPTION

[0095] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0096] Example 1: Please refer to Figure 1 As shown, a distribution network planning and operation joint integrated optimization method described in this embodiment is applied to a distribution network management and control platform, including:

[0097] S1: Obtain the planning strategy of the distribution network, extract planning features from the planning strategy, and construct a joint distribution network;

[0098] Planning strategy refers to the specific plan that each distribution subgrid has prepared and planned in advance to build a joint distribution network. It can represent the real planning ideas and measures of each distribution subgrid as a whole, so as to accurately distinguish each distribution subgrid and ensure the independence of each distribution subgrid in the process of building a joint distribution network.

[0099] Planning features refer to features that can concisely and accurately represent cumbersome and lengthy planning strategies, and serve as the basis for the subsequent construction of a joint distribution network to ensure the accuracy of the subsequent construction of a joint distribution network;

[0100] Planning characteristics include load characteristics, line characteristics and cycle characteristics; load characteristics are used to represent load data in the planning strategy of the distribution network, line characteristics are used to represent line data in the planning strategy of the distribution network, and cycle characteristics are used to represent cycle data in the planning strategy of the distribution network;

[0101] The methods for extracting load characteristics, line characteristics and cycle characteristics include:

[0102] The planning data packages of i distribution sub-grids are queried from the distribution network management and control platform respectively, and the i planning data packages are split into c sub-data packages one by one; the planning data package is used to represent the overall planning strategies of different types in the distribution sub-grid, while the sub-data package is the smallest unit constituting the planning data package and is used as a direct object for identifying the planning strategy;

[0103] Identify the remark words of the c sub-data packets one by one, record the sub-data packets with the remark word "strategy" as planning strategies, and obtain i planning strategies; the remark word is used to directly represent the planning scheme represented in the sub-data packet and serves as a basis for identifying and judging the planning strategy;

[0104] The key semantics of each planning strategy are identified one by one through natural language processing technology, and the keywords in the key semantics are marked;

[0105] Record load, usage and supply as load standard words, and record the key semantics of the keyword containing the load standard word as load feature, and obtain i load features;

[0106] The line, path and distribution are recorded as line standard words, and the key semantics of the keywords containing the line standard words are recorded as line features, and i line features are obtained;

[0107] The period, duration and time are recorded as the period standard words, and the key semantics of the keyword containing the period standard words are recorded as the period feature, and i period features are obtained.

[0108] After the load characteristics, line characteristics and cycle characteristics are extracted, a joint distribution network can be constructed according to the extracted load characteristics, line characteristics and cycle characteristics, so that the joint distribution network can integrate i distribution subgrids into an integrated distribution network system;

[0109] The construction methods of the joint distribution network include:

[0110] The average failure rate of i distribution sub-grids in a statistical period is queried one by one through the database to obtain i average failure rates;

[0111] Arrange i distribution subgrids in order according to the average failure rate from small to large, and establish an associated channel between two adjacent distribution subgrids to generate an initial distribution network;

[0112] Three independent parameter boxes are constructed at the parameter end of the initial distribution network, which are recorded as load parameter box, line parameter box and cycle parameter box. The parameter end refers to the port on the initial distribution network used to import specific parameters to ensure the accurate import of specific parameters, and the independent parameter box structure can ensure the relative independence of each imported parameter, and the imported parameters will not be confused with each other.

[0113] Aggregate i load characteristics, i line characteristics and i cycle characteristics respectively to form a load parameter package, a line parameter package and a cycle parameter package;

[0114] The load parameter package, line parameter package and cycle parameter package are respectively imported into the load parameter box, line parameter box and cycle parameter box of the initial distribution network to construct a joint distribution network.

[0115] It should be noted that after the joint distribution network is constructed, the joint distribution network can associate i independent distribution sub-grids as a whole, so that the i independent distribution sub-grids can form an integrated overall structure, thereby facilitating the subsequent integrated optimization control processing of the distribution network.

[0116] S2: Collect the comprehensive operating parameters of the combined distribution network in operation, and calculate the operating reliability coefficient based on the comprehensive operating parameters;

[0117] Comprehensive operation parameters refer to the ability to comprehensively represent various operation change parameters of the combined distribution network under operation status, so as to provide data representation of the real operation status of the combined distribution network and serve as the data basis for subsequent judgment of the operation reliability of the combined distribution network;

[0118] The comprehensive operation parameters include defense trigger frequency, load shortage ratio and effective response ratio;

[0119] The defense trigger frequency refers to the number of times the safety defense system is triggered per unit time in the operation state of the joint distribution network, which can be used to numerically represent the safety performance of the operation state of the joint distribution network. The greater the defense trigger frequency, the more times the safety defense system is triggered per unit time in the operation state of the joint distribution network, the worse the operation reliability of the joint distribution network, and the smaller the operation reliability coefficient;

[0120] Methods for obtaining defense trigger frequency include:

[0121] The time when the joint distribution network first generates an access log is queried through the timestamp and recorded as the starting time;

[0122] When no access log is generated within the preset time, the time when the last access log is generated is recorded as the end time; the preset time is used to represent the maximum time between the generation of two adjacent access logs, so as to limit the time span of statistical analysis of access logs and avoid the phenomenon of too many or too few access logs in statistical analysis;

[0123] The duration between the start time and the end time is recorded as the security defense duration, and all access logs within the security defense duration are counted to obtain k access logs;

[0124] Mark the generation time of k access logs one by one, and select k security defense logs corresponding to the generation time of the k access logs from the security defense system;

[0125] The defense status of k security defense logs is queried one by one, and the security defense logs whose defense status is triggered are recorded as security triggered logs; the defense status is used to represent the status of the security defense log, and the defense status includes the triggered state and the untriggered state; so that different defense states correspond to different security defense logs;

[0126] Count the number of security trigger logs, and compare the number of security trigger logs with the security defense duration to obtain the defense trigger frequency;

[0127] The expression for defense trigger frequency is:

[0128]

[0129] In the formula, FY Cf To defend the trigger frequency, SL Cf is the number of security trigger logs, SC fy For safety defense duration.

[0130] The load shortage ratio value refers to the ratio of the number of power supply load shortage phenomena in the combined distribution network under operation to the total power supply quantity, which can be used to numerically represent the load performance of the combined distribution network under operation. The larger the load shortage ratio value, the larger the ratio of the number of power supply load shortage phenomena in the combined distribution network under operation to the total power supply quantity, the worse the operation reliability of the combined distribution network, and the smaller the operation reliability coefficient;

[0131] Methods for obtaining the load shortage ratio value include:

[0132] Mark the load users on the m power supply lines in the joint distribution network one by one to obtain m power load terminals;

[0133] The n historical loads of the m power load terminals are queried one by one through the load management system, and the load moments corresponding to the n historical loads are marked one by one to obtain the n load moments;

[0134] The power supply loads of the output ends of the m power supply lines at the n load moments are sequentially queried through the technical parameter table to obtain the n output loads;

[0135] Compare the n output loads with the n historical loads one by one, record the output load that is smaller than the historical load as the target load, and count the number of target loads on the m power supply lines to obtain m load quantity values;

[0136] The power supply lines where the load quantity value is greater than half of the total historical load value are recorded as load shortage lines, and the number of load shortage lines is counted;

[0137] Compare the number of load shortage lines with the number of power supply lines to obtain a load shortage ratio value;

[0138] The expression of load shortage ratio is:

[0139]

[0140] Where FH dq is the load shortage ratio, SL dq is the number of load shortage lines, and m is the number of power supply lines.

[0141] The effective response ratio value refers to the ratio of the number of effective response times to the total number of responses in the operating state of the combined distribution network, which can be used to numerically represent the response performance of the operating state of the combined distribution network. The larger the effective response ratio value, the larger the ratio of the number of effective response times to the total number of responses in the operating state of the combined distribution network, the better the operating reliability of the combined distribution network, and the greater the operating reliability coefficient;

[0142] Methods for obtaining the effective response ratio include:

[0143] A1: At the same time, the distribution network control platform inputs response test instructions to m power supply lines respectively;

[0144] A2: After a preset response cycle, the processed response test instructions are received at the power load ends of the m power supply lines respectively, and the attribute status of the processed response test instructions is marked; the preset response cycle refers to the maximum duration corresponding to a complete processing of the response test instruction, and is used as a basis for counting the duration of the processed response test instructions at the power load end;

[0145] A3: The processed response test instruction whose attribute status is processed is recorded as a valid response instruction, and the power supply line corresponding to the valid response instruction is recorded as a valid line; the attribute status is used to indicate whether the response test instruction is processed, and the attribute status includes a processed state and an unprocessed state;

[0146] A4: Count the number of effective lines, and compare the number of effective lines with the number of power supply lines to obtain a sub-ratio value;

[0147] A5: Repeat the above steps A1-A4 w times to obtain w sub-proportion values;

[0148] The expression of the sub-ratio value is:

[0149]

[0150] In the formula, ZB zw is the w-th sub-proportion value, SL yxw is the number of w-th valid lines;

[0151] A6: Add up the w sub-proportion values ​​one by one and calculate the average to obtain the effective response proportion value;

[0152] The expression of the effective response ratio is:

[0153]

[0154] In the formula, YX xy is the effective response ratio, ZB za is the a-th sub-proportion value.

[0155] After obtaining the defense trigger frequency, load shortage ratio and effective response ratio, the operation data reflecting the operation reliability of the joint distribution network can be calculated according to the defense trigger frequency, load shortage ratio and effective response ratio, that is, the operation reliability coefficient, so that the operation reliability coefficient can be used as a basis for judging the operation status of the joint distribution network;

[0156] The expression of the operating reliability coefficient is:

[0157]

[0158] In the formula, KK xs is the operational reliability factor, σ 1 , σ 2 , σ 3 is a weight factor greater than 0;

[0159] Among them, σ 1 +σ 2 +σ 3 =1, exemplary, σ 1 is 0.36, σ 2 is 0.33, σ 3 is 0.31.

[0160] S3: Compare the operation reliability coefficient with the preset operation reliability threshold, identify the operation status of the joint distribution network, and determine whether to switch to the joint optimization mode;

[0161] After the operation reliability coefficient is calculated, the operation status of the joint distribution network can be evaluated and analyzed according to the size of the operation reliability coefficient, so as to identify the operation status of the joint distribution network. The operation status is to identify the real state of the joint distribution network according to the actual defense trigger frequency, load shortage ratio and effective response ratio, and serve as the basis for the subsequent integrated optimization of the joint distribution network.

[0162] The operating state includes a normal state and an abnormal state; the normal state means that the operating state of the combined distribution network is good and no abnormal phenomenon occurs, and the abnormal state means that the operating state of the combined distribution network is poor and abnormal phenomenon occurs;

[0163] The identification methods of normal state and abnormal state include:

[0164] The operating reliability factor KK xs Compared with the preset operation reliability threshold KK yz Comparison; The preset operation reliability threshold refers to the minimum value of the operation reliability coefficient corresponding to the operation state of the joint distribution network when there is no abnormal phenomenon, which can distinguish the real-time operation reliability coefficient; The preset operation reliability threshold is obtained by collecting a large number of minimum values ​​of the operation reliability coefficient corresponding to the operation state of the joint distribution network when there is no abnormal phenomenon, and then calculating the average value;

[0165] When KK xs Greater than or equal to KK yz When , it indicates that the operation reliability coefficient is greater than or equal to the preset operation reliability threshold value. At this time, the operation state of the combined distribution network is good, and the normal state is identified;

[0166] When KK xs Smaller than KK yz When , it means that the operation reliability coefficient is less than the preset operation reliability threshold. At this time, the operation state of the combined distribution network is poor, and the abnormal state is identified.

[0167] The joint optimization mode refers to the optimization mode switched to optimize and improve the operation status of the joint distribution network when an abnormal phenomenon occurs in the joint distribution network, which can ensure that the joint distribution network can be planned and operated in an integrated optimization mode;

[0168] The determination method of whether to switch the joint optimization mode includes:

[0169] When the operation state of the joint distribution network is normal, it is not necessary to optimize the joint distribution network, and it is determined not to switch to the joint optimization mode;

[0170] When the operating state of the combined distribution network is abnormal, it is necessary to optimize the combined distribution network, and then it is determined to switch to the combined optimization mode.

[0171] S4: comparing the comprehensive operating parameters with the corresponding over-limit standard values, and identifying the optimization parameters from the comprehensive operating parameters according to the comparison results;

[0172] When the joint optimization mode is triggered, one or more parameters that cause the operation state of the joint distribution network to deteriorate will appear in the comprehensive operation parameters of the joint distribution network, which are the optimization parameters. Therefore, it is necessary to accurately identify the optimization parameters so that the optimization parameters can be used as the specific objects of subsequent optimization measures.

[0173] Methods for identifying optimization parameters include:

[0174] The defense trigger frequency is subtracted from the preset defense trigger standard value, and then compared with the defense trigger frequency to obtain the defense trigger over-limit value; the defense trigger standard value refers to the maximum value of the defense trigger frequency corresponding to the operation state of the joint distribution network without any abnormal phenomenon, which serves as the basis for the subsequent calculation of the defense trigger over-limit value;

[0175] The expression of the defense trigger over-limit value is:

[0176]

[0177] In the formula, FY CX To prevent triggering of over-limit value, FY bz It is the preset defense trigger standard value;

[0178] When the defense trigger over-limit value is greater than the defense over-limit standard value, it means that the defense trigger over-limit value at this time will cause abnormal phenomena in the operation state of the joint distribution network, and the defense trigger frequency is identified as an optimization parameter; the defense over-limit standard value refers to the maximum value of the corresponding defense trigger over-limit value when there is no abnormal phenomenon in the operation state of the joint distribution network, which is used to determine whether the defense trigger frequency is an optimization parameter;

[0179] The load shortage ratio value is subtracted from the preset load shortage standard value, and then compared with the load shortage ratio value to obtain the load shortage excess value; the load shortage standard value refers to the maximum value of the load shortage ratio value corresponding to the operation state of the joint distribution network without abnormal phenomena, which serves as the basis for the subsequent calculation of the load shortage excess value;

[0180] The expression of load shortage exceeding limit is:

[0181]

[0182] Where FH CX FH is the load shortage exceeding limit value. bz is the preset load shortage standard value;

[0183] When the load shortage excess value is greater than the load excess standard value, it means that the load shortage ratio at this time will cause abnormal phenomena in the operation state of the joint distribution network, and the load shortage ratio value is identified as an optimization parameter; the load excess standard value refers to the maximum value of the load shortage excess value corresponding to the operation state of the joint distribution network without abnormal phenomena, which is used to determine whether the load shortage ratio value is an optimization parameter;

[0184] The effective response ratio is subtracted from the preset effective response standard value, and then compared with the effective response ratio to obtain the effective response over-limit value; the effective response standard value refers to the minimum value of the effective response ratio corresponding to the operation state of the joint distribution network without abnormal phenomena, which serves as the basis for the subsequent calculation of the effective response over-limit value;

[0185] The expression of effective response over-limit value is:

[0186]

[0187] Where FH CX To effectively respond to the limit value, YX bz is the preset effective response standard value;

[0188] When the effective response over-limit value is less than the effective over-limit standard value, it means that the effective response proportion value at this time will cause abnormal phenomena in the operation state of the joint distribution network, and the effective response proportion value is identified as an optimization parameter. The effective over-limit standard value refers to the minimum value of the effective response over-limit value corresponding to the operation state of the joint distribution network without abnormal phenomena, which is used to determine whether the effective response proportion value is an optimization parameter.

[0189] S5: Develop optimization instructions according to the optimization parameters, and execute the optimization instructions in order based on the execution priority;

[0190] Optimization instructions refer to specific instructions formulated based on the identified optimization parameters that can optimize the operating status of the joint distribution network and provide guidance information for subsequent optimization measures of the joint distribution network;

[0191] The optimization instructions include instructions for reducing the defense trigger frequency, instructions for reducing the load shortage ratio, and instructions for increasing the effective response ratio;

[0192] The method for formulating the instruction to reduce the defense trigger frequency, the instruction to reduce the load shortage ratio, and the instruction to increase the effective response ratio includes:

[0193] When the optimization parameter is the defense trigger frequency, the safety performance of the joint distribution network needs to be optimized, and an instruction to reduce the defense trigger frequency is formulated;

[0194] When the optimization parameter is the load shortage ratio, it is necessary to optimize the load performance of the joint distribution network, and then formulate an instruction to reduce the load shortage ratio;

[0195] When the optimization parameter is the effective response ratio, it is necessary to optimize the response performance of the combined distribution network, and an instruction to increase the effective response ratio is formulated.

[0196] When two or three specific optimization instructions are formulated at the same time, it is necessary to arrange the multiple optimization instructions in order to ensure that the multiple optimization instructions can be ordered in order, thereby ensuring an integrated optimization effect on the planning and operation of the joint distribution network;

[0197] Since the defense trigger frequency will directly affect the safety performance of the joint distribution network, the defense trigger frequency has the highest execution priority, while the effective response ratio is used to represent the response time and does not directly affect the safety performance of the joint distribution network. Therefore, the effective response ratio has the lowest execution priority;

[0198] In summary, the execution priorities are: the instruction to reduce the defense trigger frequency has the first priority, the instruction to reduce the load shortage ratio has the second priority, and the instruction to increase the effective response ratio has the third priority.

[0199] It should be noted that after the execution priority of the optimization instruction is formulated, the relevant parameters in the joint distribution network can be integratedly optimized and adjusted according to the specific optimization instructions and execution priority, so that the operating state of the joint distribution network can be improved, and until the operating state of the joint distribution network is normal.

[0200] In this embodiment, by acquiring the planning strategy of the distribution network, extracting the planning features from the planning strategy, and constructing a joint distribution network, collecting the comprehensive operating parameters of the joint distribution network in the operating state, and calculating the operating reliability coefficient based on the comprehensive operating parameters, the operating reliability coefficient is compared with the preset operating reliability threshold, the operating state of the joint distribution network is identified, and it is determined whether to switch to the joint optimization mode, the comprehensive operating parameters are compared with the corresponding over-limit standard values, and according to the comparison results, the optimization parameters are identified from the comprehensive operating parameters, the optimization instructions are formulated according to the optimization parameters, and the optimization instructions are executed in order based on the execution priority; Compared with the prior art, by extracting the planning features of the distribution network It can link various independent distribution subgrids together to form an integrated system architecture, construct a joint distribution network with integrated planning and operation, and by collecting the comprehensive operating parameters of the joint distribution network, it can accurately calculate the operating reliability coefficient, so as to accurately evaluate and judge the operating reliability of the joint distribution network, and can timely and accurately discover abnormal phenomena in the joint distribution network. At the same time, it can formulate corresponding optimization instructions based on the abnormal phenomena to ensure that the operating status of the joint distribution network can be in a safe and stable state, avoid serious faults in the joint distribution network, and thus achieve the optimization effect of the joint integration of distribution network planning and operation, and effectively ensure the safety and reliability of the distribution network system.

[0201] Example 2: Please refer to Figure 2As shown, the part not described in detail in this embodiment is described in the first embodiment, and a distribution network planning and operation joint integrated optimization system is provided, which is applied to the distribution network management and control platform, and is used to implement a distribution network planning and operation joint integrated optimization method, including a distribution network construction module, a coefficient calculation module, a mode switching module, a comparison and identification module and an instruction formulation module, wherein each module is connected via a wired or wireless network;

[0202] The distribution network construction module is used to obtain the planning strategy of the distribution network, extract the planning features from the planning strategy, and construct a joint distribution network. The planning features include load characteristics, line characteristics, and cycle characteristics.

[0203] The coefficient calculation module is used to collect the comprehensive operating parameters of the joint distribution network in the operating state, and calculate the operating reliability coefficient based on the comprehensive operating parameters, the comprehensive operating parameters include the defense trigger frequency, the load shortage ratio and the effective response ratio;

[0204] A mode switching module is used to compare the operation reliability coefficient with a preset operation reliability threshold, identify the operation status of the joint distribution network, and determine whether to switch the joint optimization mode;

[0205] A comparison and identification module is used to compare the comprehensive operating parameters with the corresponding over-limit standard values, and identify the optimization parameters from the comprehensive operating parameters according to the comparison results;

[0206] The instruction formulation module is used to formulate optimization instructions according to the optimization parameters and execute the optimization instructions in an orderly manner based on the execution priority.

[0207] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A distribution network planning and operation joint integrated optimization method, applied to a distribution network management and control platform, characterized in that: include: S1: Obtain the planning strategy of the distribution network, extract planning features from the planning strategy, and construct a joint distribution network. The planning features include load features, line features, and cycle features. S2: Collect the comprehensive operating parameters of the joint distribution network in operation, and calculate the operation reliability coefficient based on the comprehensive operating parameters, the comprehensive operating parameters include the defense trigger frequency, the load shortage ratio and the effective response ratio; S3: Compare the operation reliability coefficient with the preset operation reliability threshold, identify the operation status of the joint distribution network, and determine whether to switch the joint optimization mode; if the joint optimization mode is switched, execute S4; if the joint optimization mode is not switched, repeat S2-S3; S4: comparing the comprehensive operating parameters with the corresponding over-limit standard values, and identifying the optimization parameters from the comprehensive operating parameters according to the comparison results; S5: Develop optimization instructions according to the optimization parameters, and execute the optimization instructions in an orderly manner based on the execution priority.

2. A distribution network planning and operation joint integrated optimization method according to claim 1, characterized in that: The method for extracting the load characteristics, line characteristics and cycle characteristics comprises: The planning data packets of i distribution sub-grids are respectively queried from the distribution network management and control platform, and the i planning data packets are split into c sub-data packets one by one; Identify the remark words of the c sub-data packets one by one, record the sub-data packets whose remark words are strategies as planning strategies, and obtain i planning strategies; The key semantics of each planning strategy are identified one by one through natural language processing technology, and the keywords in the key semantics are marked; Record load, usage and supply as load standard words, and record the key semantics of the keyword containing the load standard word as load feature, and obtain i load features; The line, path and distribution are recorded as line standard words, and the key semantics of the keywords containing the line standard words are recorded as line features, and i line features are obtained; The period, duration and time are recorded as the period standard words, and the key semantics of the keyword containing the period standard words are recorded as the period feature, and i period features are obtained.

3. A distribution network planning and operation joint integrated optimization method according to claim 2, characterized in that: The method for constructing the combined distribution network includes: The average failure rate of i distribution sub-grids in a statistical period is queried one by one through the database to obtain i average failure rates; Arrange i distribution subgrids in order according to the average failure rate from small to large, and establish an associated channel between two adjacent distribution subgrids to generate an initial distribution network; Three independent parameter boxes are constructed at the parameter end of the initial distribution network, which are denoted as load parameter box, line parameter box and cycle parameter box; Aggregate i load characteristics, i line characteristics and i cycle characteristics respectively to form a load parameter package, a line parameter package and a cycle parameter package; The load parameter package, line parameter package and cycle parameter package are respectively imported into the load parameter box, line parameter box and cycle parameter box of the initial distribution network to construct a joint distribution network.

4. A distribution network planning and operation joint integrated optimization method according to claim 3, characterized in that: The method for obtaining the defense trigger frequency includes: The time when the joint distribution network first generates an access log is queried through the timestamp and recorded as the starting time; When no access log is generated within the preset time, the time when the last access log is generated is recorded as the end time; The duration between the start time and the end time is recorded as the security defense duration, and all access logs within the security defense duration are counted to obtain k access logs; Mark the generation time of k access logs one by one, and select k security defense logs corresponding to the generation time of the k access logs from the security defense system; Query the defense status of k security defense logs one by one, and record the security defense logs whose defense status is triggered as security trigger logs; Count the number of security trigger logs, and compare the number of security trigger logs with the security defense duration to obtain the defense trigger frequency; The expression for defense trigger frequency is: In the formula, FY cf To defend the trigger frequency, SL cf is the number of security trigger logs, SC fy For safety defense duration.

5. A distribution network planning and operation joint integrated optimization method according to claim 4, characterized in that: The method for obtaining the load shortage ratio value includes: Mark the load users on the m power supply lines in the joint distribution network one by one to obtain m power load terminals; The n historical loads of the m power load terminals are queried one by one through the load management system, and the load moments corresponding to the n historical loads are marked one by one to obtain the n load moments; The power supply loads of the output ends of the m power supply lines at the n load moments are sequentially queried through the technical parameter table to obtain the n output loads; Compare the n output loads with the n historical loads one by one, record the output load that is smaller than the historical load as the target load, and count the number of target loads on the m power supply lines to obtain m load quantity values; The power supply lines where the load quantity value is greater than half of the total historical load value are recorded as load shortage lines, and the number of load shortage lines is counted; Compare the number of load shortage lines with the number of power supply lines to obtain a load shortage ratio value; The expression of load shortage ratio is: Where FH dq is the load shortage ratio, SL dq is the number of load shortage lines, and m is the number of power supply lines.

6. A distribution network planning and operation joint integrated optimization method according to claim 5, characterized in that: The method for obtaining the effective response ratio value includes: A1: At the same time, the distribution network control platform inputs response test instructions to m power supply lines respectively; A2: After a preset response cycle, the processed response test instructions are received at the power load ends of the m power supply lines respectively, and the attribute status of the processed response test instructions is marked; A3: Record the processed response test instruction whose attribute status is processed as a valid response instruction, and record the power supply line corresponding to the valid response instruction as a valid line; A4: Count the number of effective lines, and compare the number of effective lines with the number of power supply lines to obtain a sub-ratio value; A5: Repeat the above steps A1-A4 w times to obtain w sub-proportion values; The expression of the sub-ratio value is: In the formula, ZB zw is the w-th sub-proportion value, SL yxw is the number of w-th valid lines; A6: Add up the w sub-proportion values ​​one by one and calculate the average to obtain the effective response proportion value; The expression of the effective response ratio is: In the formula, YX xy is the effective response ratio, ZB za is the a-th sub-proportion value.

7. A distribution network planning and operation joint integrated optimization method according to claim 6, characterized in that: The expression of the operation reliability coefficient is: In the formula, KK xs is the operational reliability coefficient, σ1, σ2, σ3 are weight factors greater than 0; The operating status includes normal status and abnormal status; The identification methods of normal state and abnormal state include: The operating reliability factor KK xs Compared with the preset operation reliability threshold KK yz Compare; When KK xs Greater than or equal to KK yz When , the operation state of the combined distribution network is identified as a normal state; When KK xs Smaller than KK yz When the operating state of the combined distribution network is identified as an abnormal state.

8. A distribution network planning and operation joint integrated optimization method according to claim 7, characterized in that: The method for determining whether to switch the joint optimization mode includes: When the operation state of the joint distribution network is normal, it is determined not to switch to the joint optimization mode; When the operating state of the joint distribution network is abnormal, it is determined to switch to the joint optimization mode.

9. A distribution network planning and operation joint integrated optimization method according to claim 8, characterized in that: The method for identifying the optimization parameters includes: Subtract the defense trigger frequency from the preset defense trigger standard value, and compare it with the defense trigger frequency to obtain the defense trigger over-limit value; The expression of the defense trigger over-limit value is: In the formula, FY cx To prevent triggering of over-limit value, FY bz It is the preset defense trigger standard value; When the defense triggering over-limit value is greater than the defense over-limit standard value, the defense triggering frequency is identified as an optimization parameter; The load shortage ratio value is subtracted from the preset load shortage standard value, and then compared with the load shortage ratio value to obtain the load shortage excess value; The expression of load shortage exceeding limit is: Where FH cx FH is the load shortage exceeding limit value. bz is the preset load shortage standard value; When the load shortage excess value is greater than the load excess standard value, the load shortage ratio value is identified as an optimization parameter; Subtract the effective response ratio from the preset effective response standard value, and compare it with the effective response ratio to obtain the effective response over-limit value; The expression of effective response over-limit value is: In the formula, YX cx To effectively respond to the limit value, YX bz is the preset effective response standard value; When the effective response excess value is less than the effective excess standard value, the effective response proportion value is identified as the optimization parameter.

10. A distribution network planning and operation joint integrated optimization method according to claim 9, characterized in that: The optimization instructions include instructions for reducing the defense trigger frequency, instructions for reducing the load shortage ratio, and instructions for increasing the effective response ratio; The method for formulating the instruction to reduce the defense trigger frequency, the instruction to reduce the load shortage ratio, and the instruction to increase the effective response ratio includes: When the optimization parameter is the defense trigger frequency, an instruction to reduce the defense trigger frequency is formulated; When the optimization parameter is the load shortage ratio, an instruction to reduce the load shortage ratio is formulated; When the optimization parameter is the effective response ratio, an instruction to increase the effective response ratio is formulated; The execution priorities are: the instruction to reduce the defense trigger frequency has the first priority, the instruction to reduce the load shortage ratio has the second priority, and the instruction to increase the effective response ratio has the third priority.

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