Modular generation system and method for pricing standards of 500kv substation technical transformation project

Abstract

The application discloses a 500kV transformer substation technical transformation project pricing standard modular generation system and method, relates to the field of power engineering cost management informatization, and solves the problems of difficulty in quantifying interface constraints among modules, dependence of module combination on manual experience, and inability to trace engineering root causes for cost correction in the preparation of the 500kV transformer substation technical transformation project pricing standard. The application builds a standard pricing module library and defines an interface state vector, calculates the total interface constraint cost of a module combination scheme to optimize the module combination, identifies an interface constraint chain based on the interface constraint edge and assembles a work breakdown structure, traces back the interface constraint original information along a hierarchical path and calls a constraint and cost mapping rule to determine an engineering quantity increment coefficient, and finally generates a structured pricing standard file. The application realizes the modular automatic generation of the 500kV transformer substation technical transformation project pricing standard, accurate quantification of the interface constraint cost, and full traceability of the cost correction.

Description

Technical Field

[0001] This invention belongs to the field of information technology for power engineering cost management, specifically a modular generation system and method for pricing standards of 500kV substation technical renovation projects. Background Technology

[0002] A 500kV substation is a crucial node in the power system. Its technical renovation project refers to the technical engineering work involving the replacement, upgrading, or improvement of existing primary equipment, secondary equipment, civil engineering facilities, and related systems within an already constructed and energized substation. Unlike new construction projects, the pricing of 500kV substation renovation projects requires consideration of the complex interface relationships between the new construction and numerous existing facilities within the substation. These interfaces involve multiple dimensions, including physical interface parameters, electrical interface parameters, spatial interface parameters, and temporal interface parameters. Different specialties and different work modules are mutually constrained through these interfaces. Furthermore, the implementation of each work module must adapt to the existing interface environment conditions on site. When preparing the pricing documents for a 500kV substation renovation project, the entire renovation project needs to be broken down into several functional units according to the work content. Based on the interface relationships between each unit and the adaptability of each unit to the site environment, the functional units should be rationally organized, and the pricing standards for each unit should be determined. The final pricing standard document is presented in the form of bill of quantities items and corresponding comprehensive unit prices, serving as the basis for cost control and bidding for the renovation project.

[0003] The following problems exist in the existing technology:

[0004] In the existing technology, when preparing the cost estimate for a 500kV substation renovation project, the interface constraints between multiple work modules in the renovation project mainly rely on the cost estimator's qualitative judgment based on personal experience. There is a lack of formal calculation methods for the degree of interface conflict between modules and the cost of modifying each module with the existing site environment, and it is impossible to quantitatively compare the advantages and disadvantages of different module combination schemes.

[0005] In the existing technology, the modular organization of cost documents is usually classified according to fixed professional templates, which cannot automatically reflect the actual dependencies between various work modules due to interface constraints, resulting in the disconnect between the structure of the cost document and the physical logic of the project.

[0006] In existing technologies, the impact of special on-site working conditions on the cost of bill of quantities items is usually adjusted using a general overall coefficient, which cannot accurately trace and allocate the impact of interface constraints to each affected bill of quantities item. Summary of the Invention

[0007] The present invention aims to solve at least one of the technical problems existing in the prior art; to this end, the present invention proposes a modular generation system and method for pricing standards of 500kV substation technical renovation projects, which is used to solve the above-mentioned technical problems.

[0008] The first aspect of this invention provides a modular method for generating pricing standards for 500kV substation renovation projects, comprising the following steps:

[0009] S1: Obtain the scope description data and existing interface environment data of the 500kV substation to be upgraded. Match the scope description data with the pre-built standard pricing module library to obtain a set of candidate standard pricing modules. Each standard pricing module contains benchmark pricing information and interface status vector. The benchmark pricing information includes the list of bill of quantities items under standard working conditions and the benchmark comprehensive unit price of each bill of quantities item.

[0010] S2: In the candidate standard pricing module set, calculate the total interface constraint cost of each module combination scheme. The total interface constraint cost is jointly determined by the interface conflict degree between the interface state vectors of any two standard pricing modules in the module combination scheme and the modification cost between the interface state vector of each standard pricing module and the existing interface environment data on site. Select the module combination scheme with the minimum total interface constraint cost as the optimal module combination.

[0011] S3: Based on the interface constraint edges recorded during the calculation of the total interface constraint cost, identify the interface constraint chain composed of multiple interconnected interface constraint edges; based on the interface constraint chain, assemble each standard pricing module in the optimal module combination to generate a work breakdown structure, the bottom layer of which is formed by expanding the bill of quantities items contained in each standard pricing module.

[0012] S4: Determine the standard pricing module to which each bill of quantities item belongs in the work breakdown structure, find all interface constraint edges related to the standard pricing module, and form the interface constraint source set of the bill of quantities item; trace back the original state information of each interface constraint edge along the hierarchical path of the work breakdown structure, call the preset constraint and cost mapping rules according to the original state information to determine the quantity increment coefficient, apply the quantity increment coefficient to the benchmark comprehensive unit price of the bill of quantities item to obtain the final comprehensive unit price; after completing the calculation of the final comprehensive unit price of all bill of quantities items, summarize and generate the pricing standard file.

[0013] Preferably, step S1 includes the following steps:

[0014] The scope description data includes information on the technical upgrade target, core action information, related professional scope, and on-site working condition parameters;

[0015] The existing interface environment data on site includes the physical interface parameters, electrical interface parameters, spatial interface parameters, and timing interface parameters of the interval where the object to be modified is located;

[0016] The interface state vector of each standard pricing module in the standard pricing module library also includes physical interface parameters, electrical interface parameters, spatial interface parameters, and timing interface parameters, and each dimension of the interface state vector corresponds to each dimension of the existing interface environment data on site.

[0017] Preferably, in step S2, the total interface constraint cost of each module combination scheme includes the following steps:

[0018] For any module combination scheme P, the formula for calculating the total interface constraint cost C(P,E) is as follows:

[0019]

[0020] Where m is the total number of standard pricing modules included in P, and E is the existing interface environment data on site; Let be the interface conflict degree function between standard pricing modules, and let represent the interface state vector of the i-th standard pricing module in P. Interface state vector with the j-th standard pricing module The cumulative value of conflict level across all interface parameter dimensions; Let $\frac{ ... The cumulative cost of the difference between the data and the existing interface environment data at the site in each interface parameter dimension is calculated, where λ is a preset adjustment coefficient.

[0021] Preferably, in step S3, identifying an interface constraint chain composed of multiple interconnected interface constraint edges based on the interface constraint edges recorded during the calculation of the total interface constraint cost includes the following steps:

[0022] When the cumulative conflict degree between the interface state vectors of any two standard pricing modules is greater than zero, an interface constraint edge between standard pricing modules is generated, and the conflict dimension type is recorded on the interface constraint edge between standard pricing modules.

[0023] When the cumulative value of the difference calculated between the interface state vector of any standard pricing module and the existing interface environment data on site is greater than zero, an interface constraint edge between the standard pricing module and the existing interface environment data on site is generated, and the difference dimension type is recorded on the interface constraint edge between the standard pricing module and the existing interface environment data on site.

[0024] A directed graph is constructed with each standard pricing module as a node to construct the interface constraint edges between standard pricing modules. The direction of the edges is determined according to the conflict dimension type. A depth-first traversal is performed in the directed graph to identify paths consisting of multiple edges connected end to end. Paths that meet the preset length condition are identified as interface constraint chains. For a standard pricing module that does not have interface constraint edges between standard pricing modules and any other standard pricing modules, it is regarded as an interface constraint chain containing only a single standard pricing module.

[0025] Preferably, in step S3, the step of assembling each standard pricing module in the optimal module combination to generate a work breakdown structure based on the interface constraint chain includes the following steps:

[0026] For each interface constraint chain, a strong interface coupling relationship is determined between the interface constraint edges of two adjacent standard pricing modules. When the interface constraint edge between the standard pricing modules belongs to the entity modification category dimension and the cumulative conflict degree exceeds the preset strong coupling determination threshold, it is determined that there is a strong interface coupling relationship between the two standard pricing modules. The entity modification category dimension includes the physical interface parameter dimension and the spatial interface parameter dimension.

[0027] Each consecutive standard pricing module with a strong interface coupling relationship on each interface constraint chain is aggregated into an interface coupling unit, while standard pricing modules without a strong interface coupling relationship each form an independent interface coupling unit.

[0028] Using interface coupling units as the basic assembly objects, hierarchical assembly is performed from bottom to top according to the direction of the interface constraint edges. The interface coupling units that are dependent on the interface constraint chain are assembled to the lower level of the interface coupling units that depend on the dependent interface coupling units, thereby generating the work decomposition structure.

[0029] Preferably, in step S4, determining the standard pricing module to which each item in the bill of quantities belongs in the work breakdown structure, and finding all interface constraint edges related to that standard pricing module to form the interface constraint source set for the item in the bill of quantities, includes the following steps:

[0030] For each item in the work breakdown structure, from all the interface constraint edges generated during the calculation of the total interface constraint cost, the interface constraint edges between standard pricing modules that involve the standard pricing module corresponding to the item in the work breakdown structure, and the interface constraint edges between the standard pricing module and the existing interface environment data on site that involve the standard pricing module, are selected. All the selected interface constraint edges constitute the interface constraint source set of the item in the work breakdown structure.

[0031] The original state information of each interface constraint edge in the set of interface constraint sources is traced back up along the hierarchical path of the work decomposition structure. The original state information includes at least the dimension type recorded by the interface constraint edge.

[0032] Preferably, in step S4, the step of determining the quantity increment coefficient by calling preset constraint and cost mapping rules based on the original state information, and applying the quantity increment coefficient to the benchmark comprehensive unit price of the sub-item in the bill of quantities to obtain the final comprehensive unit price, includes the following steps:

[0033] For each interface constraint edge u in the set of interface constraint sources, taking the dimension type of interface constraint edge u and the cost value recorded when calculating the total interface constraint cost as input, the constraint and cost mapping rules preset in the standard pricing module are called to obtain the engineering quantity increment coefficient caused by interface constraint edge u. ;

[0034] Calculate the final composite unit price of the aforementioned bill of quantities sub-item. The formula is:

[0035]

[0036] in, The unit price is the benchmark composite price for this sub-item in the bill of quantities, and U(item) is the set of interface constraint sources. The influence weight parameter for the interface constraint edge u;

[0037] When the interface constraint edge is the interface constraint edge between the standard pricing modules, the cost value is the cumulative conflict value. When the interface constraint edge is the interface constraint edge between the standard pricing module and the existing interface environment data on site, the cost value is the cumulative cost value of the difference amount.

[0038] A second aspect of the present invention provides a modular generation system for pricing standards of 500kV substation renovation projects, comprising the following modules:

[0039] The data acquisition and candidate module matching module is used to acquire the scope description data and existing interface environment data of the 500kV substation to be upgraded project. The scope description data is matched with the pre-built standard pricing module library to obtain a set of candidate standard pricing modules. Each standard pricing module contains benchmark pricing information and interface status vector. The benchmark pricing information includes the list of bill of quantities items under standard working conditions and the benchmark comprehensive unit price of each bill of quantities item.

[0040] The interface constraint cost optimization module is used to calculate the total interface constraint cost of each module combination scheme in the candidate standard pricing module set. The total interface constraint cost is jointly determined by the interface conflict degree between the interface state vectors of any two standard pricing modules in the module combination scheme and the modification cost between the interface state vector of each standard pricing module and the existing interface environment data on site. The module combination scheme with the minimum total interface constraint cost is selected as the optimal module combination.

[0041] The constraint chain identification and structural assembly module is used to identify an interface constraint chain consisting of multiple interconnected interface constraint edges based on the interface constraint edges recorded during the calculation of the total interface constraint cost; based on the interface constraint chain, the module assembles each standard pricing module in the optimal module combination to generate a work breakdown structure, the bottom layer of which is formed by expanding the bill of quantities items contained in each standard pricing module.

[0042] The cost dynamic correction and document generation module is used to determine the standard pricing module to which each bill of quantities item belongs in the work breakdown structure, find all interface constraint edges related to the standard pricing module, and form the interface constraint source set of the bill of quantities item; trace back the original state information of each interface constraint edge along the hierarchical path of the work breakdown structure, call the preset constraint and cost mapping rules according to the original state information to determine the quantity increment coefficient, apply the quantity increment coefficient to the benchmark comprehensive unit price of the bill of quantities item to obtain the final comprehensive unit price; after completing the calculation of the final comprehensive unit price of all bill of quantities items, the module summarizes and generates a pricing standard document.

[0043] Compared with the prior art, the beneficial effects of the present invention are:

[0044] This invention defines the interface state vector of the standard pricing module and calculates the total interface constraint cost of each module combination scheme. The total interface constraint cost is jointly determined by the interface conflict degree between modules and the cost of on-site modification of the module, thereby realizing the quantitative optimization of the module combination scheme.

[0045] This invention identifies interface constraint chains by recording interface constraint edges during the calculation of total interface constraint cost, and assembles each standard pricing module in the optimal module combination into a work breakdown structure based on the interface constraint chains, so that the structure of the pricing document can self-organize to reflect the interface dependencies between modules.

[0046] This invention traces back the original state information of each interface constraint edge along the hierarchical path of the work decomposition structure, calls the preset constraint and cost mapping rules to determine the incremental coefficient of the project quantity, and applies the coefficient to the benchmark comprehensive unit price of the corresponding sub-item, thus realizing the traceability of the entire process of accurately transferring the interface constraint cost to the specific bill of quantities sub-item and adjusting the cost. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of the method flow of the present invention.

[0048] Figure 2 This is a schematic diagram of the module flow of the present invention. Detailed Implementation

[0049] 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.

[0050] Please see Figure 1 This invention provides a modular method for generating pricing standards for 500kV substation renovation projects, comprising the following steps:

[0051] S1: Obtain the scope description data and existing interface environment data of the 500kV substation to be upgraded. Match the scope description data with the pre-built standard pricing module library to obtain a set of candidate standard pricing modules. Each standard pricing module contains benchmark pricing information and interface status vector. The benchmark pricing information includes the list of bill of quantities items under standard working conditions and the benchmark comprehensive unit price of each bill of quantities item.

[0052] S2: In the candidate standard pricing module set, calculate the total interface constraint cost of each module combination scheme. The total interface constraint cost is jointly determined by the interface conflict degree between the interface state vectors of any two standard pricing modules in the module combination scheme and the modification cost between the interface state vector of each standard pricing module and the existing interface environment data on site. Select the module combination scheme with the minimum total interface constraint cost as the optimal module combination.

[0053] S3: Based on the interface constraint edges recorded during the calculation of the total interface constraint cost, identify the interface constraint chain composed of multiple interconnected interface constraint edges; based on the interface constraint chain, assemble each standard pricing module in the optimal module combination to generate a work breakdown structure, the bottom layer of which is formed by expanding the bill of quantities items contained in each standard pricing module.

[0054] S4: Determine the standard pricing module to which each bill of quantities item belongs in the work breakdown structure, find all interface constraint edges related to the standard pricing module, and form the interface constraint source set of the bill of quantities item; trace back the original state information of each interface constraint edge along the hierarchical path of the work breakdown structure, call the preset constraint and cost mapping rules according to the original state information to determine the quantity increment coefficient, apply the quantity increment coefficient to the benchmark comprehensive unit price of the bill of quantities item to obtain the final comprehensive unit price; after completing the calculation of the final comprehensive unit price of all bill of quantities items, summarize and generate the pricing standard file.

[0055] Specifically, the scope description data and existing interface environment data of the 500kV substation upgrade project are obtained. The scope description data is then matched with a pre-built standard pricing module library to obtain a set of candidate standard pricing modules. Each standard pricing module contains benchmark pricing information and an interface state vector. The benchmark pricing information includes a list of bill of quantities items under standard operating conditions and the benchmark comprehensive unit price of each bill of quantities item. The total interface constraint cost of each module combination scheme is calculated in the candidate set. This cost is jointly determined by the interface conflict degree between modules and the cost of on-site modification of the module. The scheme with the minimum cost is selected as the optimal module combination. The interface constraint chain is identified based on the interface constraint edges recorded during the cost calculation process. Based on the interface constraint chain, the standard pricing modules in the optimal module combination are assembled to generate a work breakdown structure, the bottom layer of which is formed by expanding the bill of quantities items contained in each standard pricing module. For each item in the bill of quantities in the work breakdown structure, determine its corresponding standard pricing module and find the relevant interface constraint edges to form an interface constraint source set. Backtrack the dimension type of each interface constraint edge along the hierarchical path, call the preset constraint and cost mapping rules to determine the quantity increment coefficient and apply it to the benchmark comprehensive unit price to obtain the final comprehensive unit price. After completing the calculation of all items, summarize and generate the pricing standard file.

[0056] In one embodiment of the present invention, step S1 includes the following steps:

[0057] The scope description data includes information on the technical upgrade target, core action information, related professional scope, and on-site working condition parameters;

[0058] The existing interface environment data on site includes the physical interface parameters, electrical interface parameters, spatial interface parameters, and timing interface parameters of the interval where the object to be modified is located;

[0059] The interface state vector of each standard pricing module in the standard pricing module library also includes physical interface parameters, electrical interface parameters, spatial interface parameters, and timing interface parameters, and each dimension of the interface state vector corresponds to each dimension of the existing interface environment data on site.

[0060] Specifically, the scope description data for a 500kV substation upgrade project includes information on the upgrade target, core actions, related professional scope, and on-site operating parameters. Upgrade target information includes the type, voltage level, and model of the main equipment to be upgraded. Core actions information includes the main operation type and supporting sub-operations of this upgrade; for example, if replacement is the core action, sub-operations include old equipment removal, new equipment installation, secondary circuit connection, and handover testing. Related professional scope identifies whether the upgrade involves related professional fields such as civil engineering foundation renovation, secondary circuit changes, substation power system renovation, fire protection system renovation, or grounding grid renovation; for example, reporting civil engineering foundation renovation. On-site operating parameters include site altitude (e.g., 1050 meters), pollution level (e.g., Class D), restricted working space level (e.g., Level II, indicating a narrow working area), live-line safety distance level (e.g., 500kV standard safety distance), and permissible power outage methods (e.g., single-sided power outage).

[0061] The system automatically extracts existing interface environment data for the bay where the target device is located from the 500kV substation's digital design archives and operation and maintenance database. The digital design archives mainly include the substation's as-built general layout plan, detailed foundation drawings for each bay, secondary circuit terminal block diagrams, and cable lists. The operation and maintenance database mainly includes equipment ledgers, annual power outage maintenance plans, and protection setting sheets. The bay where the target device is located refers to the complete electrical functional unit consisting of the 500kV circuit breaker and its two disconnect switches, grounding switches, etc.

[0062] The existing interface environment data extraction process is as follows: In terms of physical interface parameters, the CAD element parser is used to identify closed polylines in the "Foundation Outline" layer of the DWG drawing to obtain the foundation plane dimensions, identify elevation markings to obtain the foundation top surface elevation, identify block references in the "Embedded Parts" layer to obtain the embedded part specifications and locations, and identify the number of grounding terminal elements in the "Grounding" layer to obtain the number of grounding connection points. In terms of spatial interface parameters, the CAD element parser is used to identify the "Road" or "Transportation Channel" layer of the DWG drawing to obtain the minimum width of the transportation channel, identify the "Assembly Site" layer to obtain the available area of ​​the equipment assembly site, and identify the crane station locations and equipment placement locations marked on the drawing to calculate the available hoisting operation radius. In terms of electrical interface parameters, a structured query statement is used to read the number of available spare terminals in the existing secondary circuit terminal blocks, the occupancy status of protection signal channels, and the available capacity of control power supply from the operation and maintenance database. In terms of timing interface parameters, a structured query statement is used to read the available power outage window duration and the power outage coupling relationship with other operating equipment (e.g., simultaneous power outages with adjacent bays) from the annual power outage maintenance plan table in the operation and maintenance database. After extraction, each parameter is organized into structured data according to four dimensions, and the dimension definition is consistent with the interface status vector of the standard pricing module; when extraction fails, a prompt for manual data entry is generated.

[0063] The standard pricing module library stores at least 300 standard pricing modules covering common technical renovation work types in 500kV substations. These modules cover typical technical renovation work such as replacement, modification, and overhaul of major equipment including main transformers, circuit breakers, disconnectors, instrument transformers, surge arresters, protection devices, and monitoring and control devices. Each standard pricing module encapsulates benchmark pricing information and interface state vectors. When constructing the standard pricing module library, various operations involved in 500kV substation technical renovations are divided into multiple standard pricing modules according to functional and interface boundaries. Each standard pricing module corresponds to an independent work unit. During the division, if two work units have any of the following interface relationships—physical interface (shared foundation, shared embedded parts), electrical interface (shared secondary circuit terminals, shared protection signal channels), spatial interface (overlapping hoisting operation radii, shared transportation channels), or temporal interface (shared power outage windows, mandatory constraints on the sequence of procedures)—they are classified into the same module candidate boundary. If none of the four types of interface relationships exist, they must be divided into different modules. After the division is completed, constraints and cost mapping rules are pre-defined in each module. For example, for a typical technical renovation project such as 500kV circuit breaker replacement, the standard pricing module library should include at least the following standard pricing modules: old circuit breaker body removal, new circuit breaker body installation, circuit breaker operating mechanism installation, circuit breaker foundation modification, circuit breaker grounding lead installation, secondary cable laying and wiring, and protection device commissioning. The benchmark pricing information for each standard pricing module includes a list of bill of quantities items for that module under standard operating conditions and the benchmark comprehensive unit price for each bill of quantities item. Taking the renovation of the foundation of a standard-priced modular circuit breaker as an example, the bill of quantities includes items such as foundation concrete removal, foundation concrete pouring, foundation formwork installation and dismantling, and anchor bolt pre-embedding. The benchmark comprehensive unit price for each item consists of six items: labor cost benchmark, material cost benchmark, machinery usage fee benchmark, enterprise management fee benchmark, profit benchmark, and regulatory fee benchmark. Each cost is pre-calculated and determined according to the "Budget Quota for Power Construction Projects" under standard working conditions (altitude below 1000 meters, pollution level A, sufficient working space, and uninterrupted power supply construction). For example, the benchmark comprehensive unit price for the foundation concrete pouring item is 1250 yuan per cubic meter, of which the labor cost benchmark is 320 yuan, the material cost benchmark is 580 yuan, the machinery usage fee benchmark is 150 yuan, the enterprise management fee benchmark is 80 yuan, the profit benchmark is 70 yuan, and the regulatory fee benchmark is 50 yuan.

[0064] Each standard pricing module's interface state vector explicitly defines the module's requirements for external interfaces, also including four dimensions. Physical interface parameters include the module's required foundation plan dimensions, foundation top elevation, embedded part specifications and locations, and number of grounding connection points; electrical interface parameters include the module's required number of secondary circuit access points, number of protection signal channels, and control power capacity; spatial interface parameters include the module's required hoisting operation radius, minimum transport channel width, and equipment assembly site area; and timing interface parameters include the module's required minimum power outage window duration and sequence requirements with other operations (e.g., must be completed after old equipment removal and before new equipment installation).

[0065] The system automatically compares the technical upgrade object information tags and core action information tags in the scope description data with the attribute tags of each standard pricing module in the standard pricing module library. Each module in the standard pricing module library has attribute tags, including applicable main equipment type tags, applicable voltage level tags, and core operation type tags (e.g., replacement). Tag matching uses a three-level rule: Level 1 is exact matching, where all three tag values ​​are exactly the same and the module is directly included; Level 2 is synonym matching, which calls a pre-set synonym mapping table (e.g., circuit breaker and switch are synonyms) for matching and then includes the module; Level 3 is generalized matching, which generalizes the equipment type tag to the parent category (e.g., circuit breaker is generalized to primary equipment) for matching and then includes the module. After merging the three-level matching results, the standard pricing module is included in the candidate standard pricing module set. For example, for a 500kV circuit breaker replacement project, the set of candidate standard pricing modules selected after tag matching may include standard pricing modules such as old circuit breaker body removal, new circuit breaker body installation, circuit breaker operating mechanism installation, circuit breaker foundation modification, circuit breaker grounding lead installation, secondary cable laying and wiring, and protection device commissioning.

[0066] In one embodiment of the present invention, step S2, the total interface constraint cost of each module combination scheme, includes the following steps:

[0067] For any module combination scheme P, the formula for calculating the total interface constraint cost C(P,E) is as follows:

[0068]

[0069] Where m is the total number of standard pricing modules included in P, and E is the existing interface environment data on site; Let be the interface conflict degree function between standard pricing modules, and let represent the interface state vector of the i-th standard pricing module in P. Interface state vector with the j-th standard pricing module The cumulative value of conflict level across all interface parameter dimensions; Let $\frac{ ... The cumulative cost of the difference between the data and the existing interface environment data at the site in each interface parameter dimension is calculated, where λ is a preset adjustment coefficient.

[0070] Specifically, the set of candidate standard pricing modules It contains n standard pricing modules, namely , ,…, .from The algorithm enumerates all subsets that satisfy two constraints, defining each satisfying subset as a module combination scheme P. The first constraint is completeness: the union of attribute labels (equipment type, voltage level, work type) of the standard pricing modules in P must completely cover all technical upgrade requirements specified in the scope description data. Coverage is determined by checking each item in the scope description data to see if the technical upgrade object, core action, and related specialty are matched by at least one module label in P. The second constraint is minimumity: P does not contain redundant standard pricing modules, provided the completeness constraint is satisfied. Redundancy is determined by checking if each subset of P (the set after deleting any module) still satisfies the completeness constraint. If it still does, the module is redundant; if deleting any module would result in incomplete coverage, then the minimumity constraint is satisfied. Only subsets that simultaneously satisfy both the completeness and minimumity constraints are retained as module combination schemes, and all module combination schemes constitute the module combination scheme set. Typically, a modular design scheme includes between 5 and 20 standard pricing modules, depending on the scale and complexity of the technical upgrade project. For more complex technical upgrade projects, when the candidate set of standard pricing modules includes interchangeable standard pricing modules, It can contain multiple different effective combinations.

[0071] for Given any module combination scheme P, where the total number of standard pricing modules in P is m, and the existing interface environment data on site is E, then the total interface constraint cost C(P,E) of P can be obtained according to the calculation formula.

[0072] In the formula for calculating C(P,E), Let be the interface conflict degree function between standard pricing modules, and let represent the interface state vector of the i-th standard pricing module in P. Interface state vector with the j-th standard pricing module The cumulative value of conflict level across all interface parameter dimensions; The calculation uses a dimension-by-dimensional accumulation method, that is... Where v is the interface parameter dimension number, with 1 to 4 corresponding to physical interface parameters, electrical interface parameters, spatial interface parameters, and timing interface parameters, respectively. and Let v be the values ​​of the interface state vectors of the i-th and j-th standard pricing modules in the v-th dimension, respectively.

[0073] The conflict degree calculation function for the v-th dimension is a piecewise linear function. The specific calculation formulas for each dimension are as follows: Physical interface parameter dimension (v=1): ,in , These are the key dimensions of the i-th and j-th standard pricing modules in the physical dimension (the values ​​of the largest difference among the foundation length, width, and embedded part specifications). This is the physical dimension conflict coefficient (e.g., 10, which can be adjusted based on actual engineering experience); when the embedded parts overlap, add an extra 3 to the result, ultimately truncating it to 10. Electrical interface parameter dimension (v=2): ,in , These represent the electrical requirements (e.g., the number of terminals required) for the i-th and j-th modules, respectively. Shared resource capacity (such as the total number of spare terminals). Electrical dimension conflict coefficient (e.g., 10, adjustable based on practical engineering experience). Spatial interface parameter dimension (v=3): ,in This represents the space occupancy of the i-th module (the normalized value of the relative available capacity that is most severely exceeded among hoisting radius, transport width, and assembly area). Let j be the space usage of the j-th module. The maximum space capacity available on site. Spatial dimension conflict coefficient (e.g., 10, which can be adjusted based on actual engineering experience). Timing interface parameter dimension (v=4): ,in , These are the continuous construction times (in hours) required for the i-th and j-th modules, respectively. The duration of the available power outage window. This is the conflict coefficient for the time-series dimension (e.g., 10, which can be adjusted based on actual engineering experience). The conflict degree is a continuous value, ranging from 0 to 10, where 0 represents no conflict and 10 represents maximum conflict. If two standard pricing modules do not compete for resources in a certain dimension (the sum of their demands does not exceed the available capacity), then that dimension... The return value is 0.

[0074] Let $\frac{ ... The cumulative cost of calculating the differences between the data and the existing interface environment data on site across various interface parameter dimensions; The calculation also uses a dimension-by-dimensional accumulation method, that is... ,in, The value of the existing interface environment data in the v-th dimension. The function for calculating the cost of the difference in the v-th dimension uses a linear calculation method of multiplying the difference by the unit price. The specific calculation formulas for each dimension are as follows: Physical interface parameter dimension (v=1): ,in, The basic area required for the standard pricing module ( ), Based on the existing foundation area on site, The unit price for basic area renovation (e.g., 800 yuan / square meter) (This can be adjusted according to the cost level of the project location). This refers to the required number of anchor bolts (pieces) for the module. This refers to the number of existing pre-embedded bolts on site (in pieces). The unit price for bolt replacement (e.g., 150 yuan / bolt, subject to adjustment). Electrical interface parameter dimensions (v=2): ,in, The number of secondary circuit connection terminals required by the module. This represents the number of spare terminals available on-site. The unit price for terminal expansion (e.g., 200 yuan / unit, which can be adjusted according to actual costs); The required control power capacity (A) for the module. For the available capacity on site, Price for power supply capacity expansion (e.g., 500 yuan / A, adjustable accordingly). Spatial interface parameter dimensions (v=3): ,in, The minimum lifting radius (m) required for the module. The available hoisting radius on site. The unit price for compensation of hoisting radius (for example, take 1200 yuan / m, which can be adjusted according to the actual situation); The minimum width (m) of the transport channel required by the module. This refers to the available aisle width on site. Compensation price for transport width (e.g., 2000 yuan / m, adjustable as needed). Timing interface parameter dimensions (v=4): ,in, The minimum continuous construction time (in hours) required for the module. The duration of the available power outage window on site. The unit price is for time compensation (for example, 312.5 yuan / hour, which is 2500 yuan for every 8 hours, and can be adjusted according to actual needs). If If there is no difference between E and the current quantity (demand does not exceed the current quantity) in a certain dimension, then that dimension is... A return value of 0 indicates that no modifications are needed.

[0075] Adjustment coefficient Used to balance the relative importance between the conflict costs between modules and the costs of on-site module modifications, the value ranges from 1.0 to 2.0, with a default value of 1.0, indicating that the two types of costs are considered with equal weight. The value selection rules are as follows: when the technical renovation project involves unilateral power outage operations (adjacent bays remain energized), take 1.0; when the technical renovation project involves station-wide power outage operations or there are coupling constraints that prevent simultaneous power outages with adjacent bays, take 1.5; when the technical renovation project involves an important hub substation and the power outage window duration is limited (less than 80% of the standard construction period), take 2.0. The default value of 1.0 is used when not set.

[0076] right For each module combination scheme, calculate its total interface constraint cost C(P,E). Select the scheme with the smallest C(P,E) as the optimal module combination. If multiple solutions have the same minimum C(P,E), the solution with the fewer standard pricing modules it contains will be selected first. .

[0077] In one embodiment of the present invention, step S3, which involves identifying an interface constraint chain composed of multiple interconnected interface constraint edges based on the interface constraint edges recorded during the calculation of the total interface constraint cost, includes the following steps:

[0078] When the cumulative conflict degree between the interface state vectors of any two standard pricing modules is greater than zero, an interface constraint edge between standard pricing modules is generated, and the conflict dimension type is recorded on the interface constraint edge between standard pricing modules.

[0079] When the cumulative value of the difference calculated between the interface state vector of any standard pricing module and the existing interface environment data on site is greater than zero, an interface constraint edge between the standard pricing module and the existing interface environment data on site is generated, and the difference dimension type is recorded on the interface constraint edge between the standard pricing module and the existing interface environment data on site.

[0080] A directed graph is constructed with each standard pricing module as a node to construct the interface constraint edges between standard pricing modules. The direction of the edges is determined according to the conflict dimension type. A depth-first traversal is performed in the directed graph to identify paths consisting of multiple edges connected end to end. Paths that meet the preset length condition are identified as interface constraint chains. For a standard pricing module that does not have interface constraint edges between standard pricing modules and any other standard pricing modules, it is regarded as an interface constraint chain containing only a single standard pricing module.

[0081] Specifically, in the calculation of the total interface constraint cost C(P,E), when the cumulative conflict degree between the interface state vectors of any two standard pricing modules is greater than zero, an interface constraint edge between the standard pricing modules is generated, and the conflict dimension type is recorded. When the cumulative cost of the difference between the interface state vector of any standard pricing module and the existing interface environment data in the field is greater than zero, an interface constraint edge between the standard pricing module and the existing interface environment data in the field is generated, and the difference dimension type is recorded. Both the conflict dimension type and the difference dimension type are one or more of the following: physical interface parameters, electrical interface parameters, spatial interface parameters, and temporal interface parameters, corresponding to the specific interface parameter dimension that caused the conflict or difference.

[0082] Optimal module combination It contains m standard pricing modules, namely , ,…, All standard pricing module interface constraint edges are combined to form a module interface constraint edge set. .by Each standard pricing module in the system is a node, with Each standard pricing module's interface constraint edge is a directed edge, constructing a directed graph G. The direction of the directed edge is determined based on the conflict dimension type recorded by the interface constraint edge. When an interface constraint edge records only a single conflict dimension type, the direction is determined according to the following rules: Under the physical interface parameter dimension, based on whether it is a basic support module in the attribute label, the direction is from the basic support module to the module that depends on the basic support module; under the spatial interface parameter dimension, based on whether it is a space-occupying dominant module in the attribute label, the direction is from the dominant module of the occupied space to the module that needs the space; under the electrical interface parameter dimension, based on whether it is a signal sending module, the direction is from the signal sending module to the signal receiving module; under the timing interface parameter dimension, based on the sequence of construction procedures, the direction is from the preceding operation module to the following operation module. When an interface constraint edge records multiple conflict dimension types simultaneously, a unique direction is determined according to priority order: timing interface parameter dimension first (procedure sequence is a hard constraint), followed by physical interface parameter dimension, then spatial interface parameter dimension, and finally electrical interface parameter dimension; the direction of the edge is determined by the direction rule corresponding to the conflict dimension with the highest priority. For example, in a 500kV circuit breaker replacement project, there is a conflict in the physical interface parameter dimension between the standard pricing module "Circuit Breaker Foundation Modification" and "New Circuit Breaker Body Installation". The circuit breaker foundation modification is the foundation support, and the new circuit breaker body installation depends on the foundation. Therefore, the directed edge points from "Circuit Breaker Foundation Modification" to "New Circuit Breaker Body Installation".

[0083] A depth-first traversal is performed in G to identify all paths consisting of multiple edges connecting the beginning and end of a path. Paths containing two or more edges (i.e., connecting at least three standard pricing module nodes) are identified as interface constraint chains; paths with fewer than two edges (i.e., containing only a single standard pricing module) are not treated as interface constraint chains, and the relevant standard pricing modules are handled according to the provisions of paragraph 3 of this section. For an isolated standard pricing module in G that does not have any inter-standard pricing module interface constraint edges with any other standard pricing modules, it is considered itself an interface constraint chain containing only a single standard pricing module. Each edge traversed sequentially from the starting standard pricing module to the ending standard pricing module on the interface constraint chain is an inter-standard pricing module interface constraint edge. All identified interface constraint chains constitute the interface constraint chain set. .

[0084] In one embodiment of the present invention, step S3, which involves assembling the standard pricing modules in the optimal module combination to generate a work breakdown structure based on the interface constraint chain, includes the following steps:

[0085] For each interface constraint chain, a strong interface coupling relationship is determined between the interface constraint edges of two adjacent standard pricing modules. When the interface constraint edge between the standard pricing modules belongs to the entity modification category dimension and the cumulative conflict degree exceeds the preset strong coupling determination threshold, it is determined that there is a strong interface coupling relationship between the two standard pricing modules. The entity modification category dimension includes the physical interface parameter dimension and the spatial interface parameter dimension.

[0086] Each consecutive standard pricing module with a strong interface coupling relationship on each interface constraint chain is aggregated into an interface coupling unit, while standard pricing modules without a strong interface coupling relationship each form an independent interface coupling unit.

[0087] Using interface coupling units as the basic assembly objects, hierarchical assembly is performed from bottom to top according to the direction of the interface constraint edges. The interface coupling units that are dependent on the interface constraint chain are assembled to the lower level of the interface coupling units that depend on the dependent interface coupling units, thereby generating the work decomposition structure.

[0088] Specifically, for the set of interface constraint chains Each interface constraint chain in the process is subjected to a strong interface coupling determination. For two adjacent standard pricing modules on an interface constraint chain, the interface constraint edge connecting these two standard pricing modules is obtained. It is then determined whether the interface constraint edge between the standard pricing modules belongs to the entity modification category dimension, which includes physical interface parameter dimensions and spatial interface parameter dimensions. If the conflict dimension type recorded in the interface constraint edge between the standard pricing modules includes physical interface parameters or spatial interface parameters, and the cumulative conflict degree value corresponding to the interface constraint edge exceeds the preset strong coupling determination threshold, the process is considered complete. If so, it is determined that there is a strong interface coupling relationship between the two standard pricing modules. To use a fixed threshold, it is set uniformly during initialization; both the physical interface parameter dimension and the spatial interface parameter dimension are taken as... =5 (This threshold is set based on empirical statistics of conflicts in physical modification projects during power technology upgrades and can be adjusted according to the actual project). When the cumulative conflict degree of an interface constraint edge in a physical interface parameter dimension exceeds 5, it is considered strongly coupled. The value range of the spatial interface parameter dimension and... The setting method is the same. If the interface constraint edge does not belong to the entity modification class dimension, or the cumulative conflict degree value does not exceed... If the relationship is weak, it is determined to be a weak interface coupling relationship and does not constitute a strong coupling.

[0089] Based on the determination of strong interface coupling relationships, consecutive standard pricing modules with strong interface coupling relationships are aggregated into one interface coupling unit on each interface constraint chain. The aggregation method is as follows: traverse the interface constraint chain from the starting standard pricing module to the ending standard pricing module. When encountering several consecutive standard pricing modules with strong interface coupling relationships in pairs, these standard pricing modules are assigned to the same interface coupling unit. If a standard pricing module on an interface constraint chain has no strong interface coupling relationship with any of its preceding and following standard pricing modules, then that standard pricing module independently constitutes an interface coupling unit. For an interface constraint chain containing only a single standard pricing module, that standard pricing module directly constitutes an interface coupling unit. All interface coupling units constitute the interface coupling unit set. Each interface coupling unit contains one or more standard pricing modules.

[0090] Using interface coupling units as the basic assembly objects, a bottom-up hierarchical assembly is performed to generate a work breakdown structure. The assembly is based on the direction of the interface constraint edges. On the interface constraint chain, directed edges point from the standard pricing module that is depended upon to the standard pricing module that depends on it. Accordingly, an interface coupling unit that contains the dependent module is called the dependent interface coupling unit, and an interface coupling unit that contains the dependent module is called the interface coupling unit that depends on the dependent interface coupling unit.

[0091] During assembly, the bill of quantities items encapsulated by each standard pricing module within each interface coupling unit are first expanded, serving as the bottom-level leaf nodes of the work breakdown structure. Items belonging to the same interface coupling unit are aggregated under the same parent node. Then, a dependency graph is constructed using all interface coupling units as nodes and the dependency directions of interface constraint edges as directed edges. A topological sort is performed on this graph to obtain the hierarchical number of each interface coupling unit. Assembly is then performed layer by layer from low to high according to the hierarchical number, placing the interface coupling unit at level 0 at the bottom layer, placing the interface coupling units that depend on them at the next higher layer, and so on upwards to the top layer. Within the same level, if there is no direct dependency between interface coupling units and they belong to the same professional category (e.g., both belonging to primary equipment or secondary equipment), they are merged under the same parent node; otherwise, they are arranged side-by-side. In the assembled hierarchical structure, the bill of quantities items contained in the standard pricing module corresponding to the dependent interface coupling unit are located below the bill of quantities items contained in the standard pricing module corresponding to the dependent interface coupling unit.

[0092] For example, the 500kV circuit breaker replacement project It contains a constraint chain consisting of "removal of the old circuit breaker body" → "circuit breaker foundation modification" → "installation of the new circuit breaker body". The cumulative conflict value of the physical interface parameters between the circuit breaker foundation modification and the installation of the new circuit breaker body is 8 (greater than 8). =5), which are determined to be strongly coupled interfaces, and are aggregated into one interface coupling unit; while the old circuit breaker body removal has no strong coupling relationship with other modules and constitutes an independent interface coupling unit. During assembly, the interface coupling unit of old circuit breaker body removal is located at the upper level (preceding operation), and the interface coupling unit formed by circuit breaker foundation modification and new circuit breaker body installation is located at the lower level (foundation modification serves new equipment installation). These interface coupling units, together with other interface coupling units, constitute the final work breakdown structure. .

[0093] After assembly is complete, a completeness check is performed to confirm the optimal module combination. Each standard pricing module has been assembled into the work breakdown structure through interface coupling units, and all items in the bill of quantities are complete; it has been confirmed that the dependency direction of each interface constraint edge is consistent with the assembly level, and there are no broken constraint chains.

[0094] In one embodiment of the present invention, step S4, which involves determining the standard pricing module to which each item in the bill of quantities belongs in the work breakdown structure, and finding all interface constraint edges related to that standard pricing module to form the interface constraint source set for the item in the bill of quantities, includes the following steps:

[0095] For each item in the work breakdown structure, from all the interface constraint edges generated during the calculation of the total interface constraint cost, the interface constraint edges between standard pricing modules that involve the standard pricing module corresponding to the item in the work breakdown structure, and the interface constraint edges between the standard pricing module and the existing interface environment data on site that involve the standard pricing module, are selected. All the selected interface constraint edges constitute the interface constraint source set of the item in the work breakdown structure.

[0096] The original state information of each interface constraint edge in the set of interface constraint sources is traced back up along the hierarchical path of the work decomposition structure. The original state information includes at least the dimension type recorded by the interface constraint edge.

[0097] Specifically, regarding the work breakdown structure Each item in the bill of quantities is processed. The underlying structure is formed by expanding upon the bill of quantities items contained in each standard pricing module. During the assembly process, the attribution relationship between each bill of quantities item and the standard pricing module that generated it is already determined. For example, in a 500kV circuit breaker replacement project... In the bill of quantities, the sub-item "Foundation Concrete Pouring" belongs to the standard pricing module "Circuit Breaker Foundation Renovation," and the sub-item "Anchor Bolt Pre-embedding" also belongs to the same standard pricing module. This established attribution relationship is directly used to determine the standard pricing module corresponding to each bill of quantities sub-item.

[0098] For the current bill of quantities item being processed, its corresponding standard pricing module From all interface constraint edges generated during the calculation of the total interface constraint cost, select those that are consistent with... All relevant interface constraint edges. The filtering rule is: if an interface constraint edge between standard pricing modules involves two standard pricing modules, then... Then the edge is selected; if the standard pricing module involved in the interface constraint edge between a standard pricing module and the existing interface environment data on site is If the selected edge is selected, then that edge is also selected. All selected interface constraint edges are gathered together to form the interface constraint source set U(item) for this sub-item of the bill of quantities.

[0099] For example, in a 500kV circuit breaker replacement project, the standard pricing module "Circuit Breaker Foundation Retrofit" may generate two interface constraint edges during the calculation of the total interface constraint cost: one is the interface constraint edge between the standard pricing module and "New Circuit Breaker Body Installation," recording the conflict dimension type as physical interface parameters; the other is the interface constraint edge between the module and existing on-site interface environment data, recording the difference dimension type as physical interface parameters, because the on-site foundation size is smaller than the module's required size. Therefore, for the bill of quantities sub-item "Foundation Concrete Pouring" belonging to "Circuit Breaker Foundation Retrofit," its U(item) will include these two interface constraint edges.

[0100] For each interface constraint edge in U(item), along The hierarchical path is used to trace back to its original state information. The specific method of tracing back is: starting from the current item in the bill of quantities, along... The hierarchical path is traced upwards layer by layer until the position of the standard pricing module associated with the interface constraint edge in the assembly structure is reached, thereby obtaining the original state information recorded when the interface constraint edge was generated. The backtracking path is obtained as follows: each bill of quantities item records the identifier of its associated interface coupling unit during assembly; each interface coupling unit records the identifiers of its included standard pricing modules; and each standard pricing module records a list of all associated interface constraint edges. The complete path can be obtained by searching from bottom to top. The backtracking terminates when the current search node has reached the root node of the work breakdown structure (single project node) or when the current search node is the standard pricing module node that generated the interface constraint edge. The original state information includes the dimension type recorded by the interface constraint edge. For interface constraint edges between standard pricing modules, the dimension type is a conflict dimension type; for interface constraint edges between a standard pricing module and existing on-site interface environment data, the dimension type is a difference dimension type. The value of the dimension type is one or more of the following: physical interface parameters, electrical interface parameters, spatial interface parameters, and temporal interface parameters.

[0101] In one embodiment of the present invention, step S4, which involves determining the quantity increment coefficient based on the original state information by calling preset constraint and cost mapping rules, and applying the quantity increment coefficient to the benchmark comprehensive unit price of the sub-item in the bill of quantities to obtain the final comprehensive unit price, includes the following steps:

[0102] For each interface constraint edge u in the set of interface constraint sources, taking the dimension type of interface constraint edge u and the cost value recorded when calculating the total interface constraint cost as input, the constraint and cost mapping rules preset in the standard pricing module are called to obtain the engineering quantity increment coefficient caused by interface constraint edge u. ;

[0103] Calculate the final composite unit price of the aforementioned bill of quantities sub-item. The formula is:

[0104]

[0105] in, The unit price is the benchmark composite price for this sub-item in the bill of quantities, and U(item) is the set of interface constraint sources. The influence weight parameter for the interface constraint edge u;

[0106] When the interface constraint edge is the interface constraint edge between the standard pricing modules, the cost value is the cumulative conflict value. When the interface constraint edge is the interface constraint edge between the standard pricing module and the existing interface environment data on site, the cost value is the cumulative cost value of the difference amount.

[0107] Specifically, for work breakdown structure For each item in the bill of quantities, a set of interface constraint sources U(item) has been constructed. Now, for each interface constraint edge u in U(item), taking the dimension type of the interface constraint edge and the cost value recorded when calculating the total interface constraint cost as input, the constraint and cost mapping rules pre-set in the standard pricing module corresponding to the bill of quantities item are called to obtain the quantity increment coefficient caused by the interface constraint edge u. .

[0108] The constraint and cost mapping rules are pre-defined within each standard pricing module when building the standard pricing module library. These rules, indexed by the dimension type and cost value of the interface constraint, store the quantity adjustment algorithms for each bill of quantities sub-item. Each rule record includes the constraint dimension type, cost value range, applicable bill of quantities sub-item code, and incremental coefficient determination function. For example, for the bill of quantities sub-item "Foundation Concrete Pouring" in the standard pricing module "Circuit Breaker Foundation Renovation," the constraint and cost mapping rule is: when the dimension type is a physical interface parameter and the cost value (i.e., the cumulative value of the difference converted to cost) corresponds to a difference area of... At that time, the quantity adjustment of the project item in the bill of quantities according to The calculation is performed, where t is the base design thickness (taken as a constant of 1.2 meters), and the adjustment is then divided by the baseline quantity of the sub-item to obtain the dimensionless quantity increment coefficient. For example, for the bill of quantities item "Installation and Removal of Foundation Formwork," under the same constraints and cost mapping rules, the quantity increment coefficient is determined by the ratio of the difference area to the contact area of ​​the formwork. For bill of quantities items with units of measurement such as item, set, or unit, the quantity increment coefficient is directly preset in the rules as a fixed percentage value (e.g., the increment for the "Protection Device Commissioning" item is 5% under time conflict), and the calculation method of dividing the difference by the baseline quantity is not used.

[0109] For conflicts caused by interface constraints between standard pricing modules, the constraint and cost mapping rules also pre-define corresponding methods for determining the incremental coefficient of the workload. For example, in a 500kV circuit breaker replacement project, there is a conflict in the physical interface parameter dimension between the standard pricing modules "Circuit Breaker Foundation Renovation" and "New Circuit Breaker Body Installation," with a cumulative conflict degree of 8. This conflict indicates that the existing foundation renovation plan needs additional reinforcement. The constraint and cost mapping rules pre-define specific rules for this situation; for example, when the cumulative conflict degree of the physical interface parameter dimension is in the range of 5 to 10, an additional 15% of the workload is added to the "Foundation Concrete Pouring" sub-item, i.e. =0.15; When the cumulative conflict level exceeds 10, an additional 25% of the workload is added. If the conflict dimension type is other, the incremental coefficient is determined according to the preset rules corresponding to that type. For example, for conflicts in the time sequence interface parameter dimension, the rule can specify that the workload increment for safety-related sub-items is determined according to the overlap duration of the power outage windows involved in the conflict. The mapping rules for each dimension are all preset based on the construction specifications and cost experience of power technology renovation projects. For example, the above values ​​can be adjusted according to the quotas of the actual project location.

[0110] After invoking the constraint and cost mapping rules, we obtain the incremental coefficient of the engineering quantity corresponding to each interface constraint edge u in U(item). Therefore, the final comprehensive unit price of the item in the bill of quantities can be obtained according to the calculation formula. .exist In the calculation formula, the influence weight parameter of the interface constraint edge u The cost value recorded by the interface constraint edge when calculating the total interface constraint cost is obtained by normalization. The specific normalization method is as follows: For all interface constraint edges in U(item), calculate the proportion of the cost value corresponding to each edge (when the interface constraint edge is an interface constraint edge between standard pricing modules, the cost value is the accumulated conflict degree value; when the interface constraint edge is an interface constraint edge between a standard pricing module and existing on-site interface environment data, the cost value is the accumulated value of the difference conversion cost) to the total cost value of all edges. This proportion is the... .therefore, =1; if U(item) is an empty set, then the summation term is 0. .

[0111] right Calculate the unit price for each item in the bill of quantities one by one to obtain the final composite unit price for each item. After calculating the unit price for all items, summarize the total price. Multiply the final composite unit price of each item in the bill of quantities by the corresponding quantity to obtain the total price for that item; according to... The hierarchical structure is summarized layer by layer from bottom to top to obtain the total cost of each level. Finally, all pricing data is organized in a standard format to generate a structured pricing standard document. This pricing standard document includes, but is not limited to: a project cost summary table, listing the total cost of individual projects and the summary data of each level; a bill of quantities pricing table, listing the project code, project name, unit of measurement, quantity, benchmark comprehensive unit price, final comprehensive unit price and total price for each bill of quantities sub-item, and an explanation of the source of the quantity increment coefficient; a unit price composition detail table, listing the benchmark values ​​and adjustments of various costs such as labor costs, material costs, and machinery usage fees; and an interface constraint cost source explanation table, recording the dimension type, cost value, influence weight and quantity increment coefficient of each interface constraint edge in the interface constraint source set of each sub-item.

[0112] Please see Figure 2 As shown, this invention is a modular generation system for pricing standards of 500kV substation renovation projects, comprising the following modules:

[0113] The data acquisition and candidate module matching module is used to acquire the scope description data and existing interface environment data of the 500kV substation to be upgraded project. The scope description data is matched with the pre-built standard pricing module library to obtain a set of candidate standard pricing modules. Each standard pricing module contains benchmark pricing information and interface status vector. The benchmark pricing information includes the list of bill of quantities items under standard working conditions and the benchmark comprehensive unit price of each bill of quantities item.

[0114] The interface constraint cost optimization module is used to calculate the total interface constraint cost of each module combination scheme in the candidate standard pricing module set. The total interface constraint cost is jointly determined by the interface conflict degree between the interface state vectors of any two standard pricing modules in the module combination scheme and the modification cost between the interface state vector of each standard pricing module and the existing interface environment data on site. The module combination scheme with the minimum total interface constraint cost is selected as the optimal module combination.

[0115] The constraint chain identification and structural assembly module is used to identify an interface constraint chain consisting of multiple interconnected interface constraint edges based on the interface constraint edges recorded during the calculation of the total interface constraint cost; based on the interface constraint chain, the module assembles each standard pricing module in the optimal module combination to generate a work breakdown structure, the bottom layer of which is formed by expanding the bill of quantities items contained in each standard pricing module.

[0116] The cost dynamic correction and document generation module is used to determine the standard pricing module to which each bill of quantities item belongs in the work breakdown structure, find all interface constraint edges related to the standard pricing module, and form the interface constraint source set of the bill of quantities item; trace back the original state information of each interface constraint edge along the hierarchical path of the work breakdown structure, call the preset constraint and cost mapping rules according to the original state information to determine the quantity increment coefficient, apply the quantity increment coefficient to the benchmark comprehensive unit price of the bill of quantities item to obtain the final comprehensive unit price; after completing the calculation of the final comprehensive unit price of all bill of quantities items, the module summarizes and generates a pricing standard document.

[0117] The above embodiments are only used to illustrate the technical methods of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of the present invention without departing from the spirit and scope of the technical methods of the present invention.

Claims

A modular method for generating pricing standards for 1.500kV substation renovation projects, characterized in that... Includes the following steps: S1: Obtain the scope description data and existing interface environment data of the 500kV substation to be upgraded. Match the scope description data with the pre-built standard pricing module library to obtain a set of candidate standard pricing modules. Each standard pricing module contains benchmark pricing information and interface status vector. The benchmark pricing information includes the list of bill of quantities items under standard working conditions and the benchmark comprehensive unit price of each bill of quantities item. S2: In the candidate standard pricing module set, calculate the total interface constraint cost of each module combination scheme. The total interface constraint cost is jointly determined by the interface conflict degree between the interface state vectors of any two standard pricing modules in the module combination scheme and the modification cost between the interface state vector of each standard pricing module and the existing interface environment data on site. Select the module combination scheme with the minimum total interface constraint cost as the optimal module combination. S3: Based on the interface constraint edges recorded during the calculation of the total interface constraint cost, identify the interface constraint chain composed of multiple interconnected interface constraint edges; based on the interface constraint chain, assemble each standard pricing module in the optimal module combination to generate a work breakdown structure, the bottom layer of which is formed by expanding the bill of quantities items contained in each standard pricing module. S4: Determine the standard pricing module to which each bill of quantities item belongs in the work breakdown structure, find all interface constraint edges related to the standard pricing module, and form the interface constraint source set of the bill of quantities item; trace back the original state information of each interface constraint edge along the hierarchical path of the work breakdown structure, call the preset constraint and cost mapping rules according to the original state information to determine the quantity increment coefficient, and apply the quantity increment coefficient to the benchmark comprehensive unit price of the bill of quantities item to obtain the final comprehensive unit price; After completing the final comprehensive unit price calculation for all items in the bill of quantities, a pricing standard document is generated.

2. The modular generation method for pricing standards of 500kV substation renovation projects according to claim 1, characterized in that, S1 includes the following steps: The scope description data includes information on the technical upgrade target, core action information, related professional scope, and on-site working condition parameters; The existing interface environment data on site includes the physical interface parameters, electrical interface parameters, spatial interface parameters, and timing interface parameters of the interval where the object to be modified is located; The interface state vector of each standard pricing module in the standard pricing module library also includes physical interface parameters, electrical interface parameters, spatial interface parameters, and timing interface parameters, and each dimension of the interface state vector corresponds to each dimension of the existing interface environment data on site.

3. The modular generation method for pricing standards of 500kV substation renovation projects according to claim 1, characterized in that, In step S2, the total interface constraint cost of each module combination scheme includes the following steps: For any module combination scheme P, the formula for calculating the total interface constraint cost C(P,E) is as follows: Where m is the total number of standard pricing modules included in P, and E is the existing interface environment data on site; Let be the interface conflict degree function between standard pricing modules, and let represent the interface state vector of the i-th standard pricing module in P. Interface state vector with the j-th standard pricing module The cumulative value of conflict level across all interface parameter dimensions; Let $\frac{ ... The cumulative cost of the difference between the data and the existing interface environment data at the site in each interface parameter dimension is calculated, where λ is a preset adjustment coefficient.

4. The modular generation method for pricing standards of 500kV substation renovation projects according to claim 3, characterized in that, In step S3, identifying an interface constraint chain composed of multiple interconnected interface constraint edges based on the interface constraint edges recorded during the calculation of the total interface constraint cost includes the following steps: When the cumulative conflict degree between the interface state vectors of any two standard pricing modules is greater than zero, an interface constraint edge between standard pricing modules is generated, and the conflict dimension type is recorded on the interface constraint edge between standard pricing modules. When the cumulative value of the difference calculated between the interface state vector of any standard pricing module and the existing interface environment data on site is greater than zero, an interface constraint edge between the standard pricing module and the existing interface environment data on site is generated, and the difference dimension type is recorded on the interface constraint edge between the standard pricing module and the existing interface environment data on site. A directed graph is constructed with each standard pricing module as a node to construct the interface constraint edges between standard pricing modules. The direction of the edges is determined according to the conflict dimension type. A depth-first traversal is performed in the directed graph to identify paths consisting of multiple edges connected end to end. Paths that meet the preset length condition are identified as interface constraint chains. For a standard pricing module that does not have interface constraint edges between standard pricing modules and any other standard pricing modules, it is regarded as an interface constraint chain containing only a single standard pricing module.

5. The modular generation method for pricing standards of 500kV substation renovation projects according to claim 4, characterized in that, In step S3, the step of assembling each standard pricing module in the optimal module combination to generate a work breakdown structure based on the interface constraint chain includes the following steps: For each interface constraint chain, a strong interface coupling relationship is determined between the interface constraint edges of two adjacent standard pricing modules. When the interface constraint edge between the standard pricing modules belongs to the entity modification category dimension and the cumulative conflict degree exceeds the preset strong coupling determination threshold, it is determined that there is a strong interface coupling relationship between the two standard pricing modules. The entity modification category dimension includes the physical interface parameter dimension and the spatial interface parameter dimension. Each consecutive standard pricing module with a strong interface coupling relationship on each interface constraint chain is aggregated into an interface coupling unit, while standard pricing modules without a strong interface coupling relationship each form an independent interface coupling unit. Using interface coupling units as the basic assembly objects, hierarchical assembly is performed from bottom to top according to the direction of the interface constraint edges. The interface coupling units that are dependent on the interface constraint chain are assembled to the lower level of the interface coupling units that depend on the dependent interface coupling units, thereby generating the work decomposition structure.

6. The modular generation method for pricing standards of 500kV substation renovation projects according to claim 4, characterized in that, In step S4, determining the standard pricing module to which each item in the bill of quantities belongs in the work breakdown structure, and finding all interface constraint edges related to that standard pricing module to form the interface constraint source set for the item in the bill of quantities, includes the following steps: For each item in the work breakdown structure, from all the interface constraint edges generated during the calculation of the total interface constraint cost, the interface constraint edges between standard pricing modules that involve the standard pricing module corresponding to the item in the work breakdown structure, and the interface constraint edges between the standard pricing module and the existing interface environment data on site that involve the standard pricing module, are selected. All the selected interface constraint edges constitute the interface constraint source set of the item in the work breakdown structure. The original state information of each interface constraint edge in the set of interface constraint sources is traced back up along the hierarchical path of the work decomposition structure. The original state information includes at least the dimension type recorded by the interface constraint edge.

7. The modular generation method for pricing standards of 500kV substation renovation projects according to claim 6, characterized in that, In step S4, the step of determining the quantity increment coefficient by calling the preset constraint and cost mapping rules based on the original state information, and applying the quantity increment coefficient to the benchmark comprehensive unit price of the sub-item in the bill of quantities to obtain the final comprehensive unit price, includes the following steps: For each interface constraint edge u in the set of interface constraint sources, taking the dimension type of interface constraint edge u and the cost value recorded when calculating the total interface constraint cost as input, the constraint and cost mapping rules preset in the standard pricing module are called to obtain the engineering quantity increment coefficient caused by interface constraint edge u. ; Calculate the final composite unit price of the aforementioned bill of quantities sub-item. The formula is: in, The unit price is the benchmark composite price for this sub-item in the bill of quantities, and U(item) is the set of interface constraint sources. The influence weight parameter for the interface constraint edge u; When the interface constraint edge is the interface constraint edge between the standard pricing modules, the cost value is the cumulative conflict value. When the interface constraint edge is the interface constraint edge between the standard pricing module and the existing interface environment data on site, the cost value is the cumulative cost value of the difference amount. A modular generation system for pricing standards of 8.500kV substation renovation projects, characterized in that... Includes the following modules: The data acquisition and candidate module matching module is used to acquire the scope description data and existing interface environment data of the 500kV substation to be upgraded project. The scope description data is matched with the pre-built standard pricing module library to obtain a set of candidate standard pricing modules. Each standard pricing module contains benchmark pricing information and interface status vector. The benchmark pricing information includes the list of bill of quantities items under standard working conditions and the benchmark comprehensive unit price of each bill of quantities item. The interface constraint cost optimization module is used to calculate the total interface constraint cost of each module combination scheme in the candidate standard pricing module set. The total interface constraint cost is jointly determined by the interface conflict degree between the interface state vectors of any two standard pricing modules in the module combination scheme and the modification cost between the interface state vector of each standard pricing module and the existing interface environment data on site. The module combination scheme with the minimum total interface constraint cost is selected as the optimal module combination. The constraint chain identification and structural assembly module is used to identify an interface constraint chain consisting of multiple interconnected interface constraint edges based on the interface constraint edges recorded during the calculation of the total interface constraint cost; based on the interface constraint chain, the module assembles each standard pricing module in the optimal module combination to generate a work breakdown structure, the bottom layer of which is formed by expanding the bill of quantities items contained in each standard pricing module. The cost dynamic correction and document generation module is used to determine the standard pricing module to which each bill of quantities item belongs in the work breakdown structure, find all interface constraint edges related to the standard pricing module, and form the interface constraint source set of the bill of quantities item; trace back the original state information of each interface constraint edge along the hierarchical path of the work breakdown structure, call the preset constraint and cost mapping rules according to the original state information to determine the quantity increment coefficient, and apply the quantity increment coefficient to the benchmark comprehensive unit price of the bill of quantities item to obtain the final comprehensive unit price; After completing the final comprehensive unit price calculation for all items in the bill of quantities, a pricing standard document is generated.

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