A method for calculating LNG station reference price and transportation cost based on multi-section path

Abstract

The LNG station reference price and freight calculation method based on the multi-section path of the present application comprises the following steps: receiving the LNG delivery plant station, one or more unloading plant stations arranged in the transportation order, the final receiving plant station, and the demand of each unloading station and the final receiving station, forming an ordered path chain, obtaining the mileage, the expected time length and the toll of each section under two strategies, calculating the transportation cost of each section according to the section mileage, the actual remaining carrying capacity and the matching parameters, obtaining the shortest time route total freight and the real-time traffic route total freight, and selecting the recommended whole order average station reference price from the two types of effective routes according to the cost priority and the same price time priority rule and outputting. The present application can form the station reference price according to the unified data caliber of the station, the demand, the route and the freight rules, and improve the consistency and comparability of the price data.

Description

Technical Field

[0001] This invention relates to the field of liquefied natural gas trading and logistics transportation technology, specifically to a method for calculating LNG arrival reference prices and freight costs based on multi-segment routes. Background Technology

[0002] In liquefied natural gas (LNG) transactions, purchasers need to consider not only the listed price or ex-factory price of the gas source, but also factors such as the shipping terminal, the unloading terminals arranged in the transportation sequence, the final receiving terminal, the demand at each terminal, the transportation route, the segment mileage, toll fees, and regional freight rate rules. In actual business, the arrival costs of the same gas source can vary significantly depending on the receiving location, the unloading sequence, and the remaining capacity of different segments. If pricing decisions are made solely based on the listed price or manually estimated freight costs, problems such as pricing deviations, insufficient comparison, and inconsistencies in the transportation cost calculations between the two parties can easily arise.

[0003] Current methods typically separate gas source price inquiries, map route queries, and freight calculations: business personnel first check the listed gas price, then manually select a route or estimate mileage, and subsequently estimate freight costs based on experience or fixed rates. This method has the following drawbacks: First, it cannot automatically handle orderly multi-segment transportation scenarios of "shipping station—multiple unloading stations—final receiving station"; second, it does not determine the remaining carrying capacity of vehicles in different transportation segments based on the demand of each unloading station; third, it is difficult to compare the shortest time route with real-time traffic routes using a unified standard; fourth, there is a lack of a unified calculation model among listed prices, segmented mileage, segmented carrying capacity, and freight rate rules; and fifth, the same order may use different reference freight rates and destination prices during the posting, quotation, and comparison stages.

[0004] Therefore, a method is needed that can obtain data on stations, demand at each station, and market listing prices from a natural gas trading platform, construct multiple transportation routes according to the unloading sequence, determine the actual remaining capacity of each transportation segment, summarize the segment costs under different route strategies, and finally output the total freight cost of the whole vehicle, the average unit freight cost, and the LNG arrival reference price, so as to provide a unified and traceable price reference for procurement announcements, carrier quotations, capacity comparison, and transaction decisions. Summary of the Invention

[0005] The present invention proposes a method for calculating the reference price and freight of LNG arrival stations based on multiple routes, which can at least solve one of the technical problems in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A method for calculating LNG arrival reference prices and freight rates based on multi-segment routes includes the following steps: S1, the LNG receiving terminals, one or more unloading terminals in sequence, the final receiving terminal, and the demand of each unloading terminal and the final receiving terminal. And obtain the market list price corresponding to the shipping factory / station. The data includes the latitude and longitude of the station and the station address. The sum of the demand at each station constitutes the initial loading capacity. ; S2, Record the shipping station as... The unloading stations are numbered sequentially as follows: to The final receiving station is recorded as To form an orderly path chain Adjacent stations constitute transportation segments. ; S3, No. Actual remaining capacity of each transportation segment This is the sum of the remaining delivery demand at the end of this segment and all subsequent delivery stations, i.e. The amount decreases gradually as the unloading process progresses; S4. For each transportation segment Shortest time route strategy is adopted respectively and real-time traffic route strategy Route planning was performed to obtain the mileage of each segment under two strategies. Expected duration and toll ,in ; S5. Match the corresponding ton-kilometer freight rate for each segment from the freight rate rule table based on the gas source region, origin and destination provinces, vehicle type, and segment mileage. Toll fees included in the coefficient and compensation The transportation cost of each segment is calculated based on the segmented mileage, the actual remaining capacity of each segment, and the matching parameters. ; S6. Summarize the segment costs under both route strategies to obtain the total freight cost for the shortest route. Real-time traffic routes and total freight cost per vehicle Then based on the initial load Calculate the average unit freight cost for the entire order based on the base. and ; S7. Add the average unit shipping cost of the entire order to the market listed price. The shortest route reference price is obtained respectively. Real-time transportation route arrival reference price Based on the principles of cost priority and time priority for routes with the same price, the recommended average destination reference price for the entire trip is selected from the two types of effective routes. And output it.

[0007] As a preferred embodiment of the LNG arrival reference price and freight calculation method based on multi-segment paths described in this invention, step S1 further includes a station coordinate verification step: For sites that have already maintained their latitude and longitude coordinates, use the latitude and longitude data directly; for sites that lack latitude and longitude coordinates but have addresses, call the geocoding service to convert the addresses into latitude and longitude coordinates; for sites that cannot be located, output a prompt message to guide users to reselect a site or maintain site information.

[0008] As a preferred embodiment of the LNG arrival reference price and freight calculation method based on multi-segment routes described in this invention, wherein: the first step S3... Actual remaining capacity of each transportation segment The calculation formula is:

[0009] in, equal to initial load , According to the segment number The increase gradually decreases, reflecting the remaining cargo capacity of the vehicle after it has completed delivery at the preceding unloading station.

[0010] As a preferred embodiment of the LNG arrival reference price and freight calculation method based on multi-segment routes described in this invention, wherein: the shortest time route strategy in step S4 and real-time traffic route strategy Route data is generated for the same origin and destination stations at the same calculation time. To ensure the comparability of segmented mileage, duration, and toll results for both types of routes using a unified time metric; and to summarize the total mileage under both strategies separately. , Total duration , and total toll , .

[0011] As a preferred embodiment of the LNG arrival reference price and freight calculation method based on multi-segment routes described in this invention, wherein: the matching dimensions of the freight rate rule table in step S5 include gas source region, gas source province, target province, vehicle type, and mileage range; ton-kilometer freight rate The freight rate is determined based on the regional combination and mileage range to which each transportation segment belongs; different segments may correspond to different ton-kilometer freight rates; toll fees are included in the coefficient. Used to control whether toll fees are included in transportation costs in full or at a discounted rate; compensation fees This includes regional compensation fees, vehicle fixed cost compensation, or other additional fees included in accordance with regulations.

[0012] As a preferred embodiment of the LNG arrival reference price and freight calculation method based on multi-segment routes described in this invention, wherein: the transportation costs of each segment in step S5 The calculation formula is:

[0013] in, For the variable freight portion that is linearly related to segmented ton-kilometers, The portion included in the toll calculation. This is the portion of the fixed compensation fee that is segmented; Total freight for the whole vehicle The cost is obtained by accumulating the transportation costs of each segment. Full precision is retained during the calculation process, and the final result is rounded to two decimal places only when it is displayed.

[0014] As a preferred embodiment of the LNG arrival reference price and freight calculation method based on multi-segment routes described in this invention, the cost priority and same-price time priority rules in step S7 are specifically as follows: When only one type of route returns a valid result, that valid result is directly used as the recommended destination reference price; When both types of routes are valid, choose The corresponding route is used as the recommendation result; when and If the total estimated time is the same, the route with the shorter estimated total time will be recommended.

[0015] As a preferred embodiment of the LNG arrival reference price and freight calculation method based on multi-segment routes described in this invention, the method further includes a step of tracking and storing the calculation results. The input station information, demand at each station, unloading order, route strategy type, matched freight rate rule version number, calculation timestamp, and calculation results are associated and saved as a calculation record for use in procurement release, quotation reference, capacity comparison, and result verification. The saved calculation results include segmented route details, segmented actual load, total freight cost of the whole vehicle, average unit freight cost of the whole order, and average reference price of the whole order at the destination for both route strategies.

[0016] As a preferred embodiment of the LNG arrival reference price and freight calculation method based on multi-segment routes described in this invention, the method further includes anomaly handling and data update steps: When the listed price is missing, route planning fails, station coordinates are missing, demand at each station is incomplete, or fare rules are missing, the corresponding error reason will be output and a prompt will be made to maintain the relevant data. When the listed price, station coordinates, or fare rules are updated, the updated data is read in the next calculation request and a new calculation record is generated, while the original historical records remain unchanged.

[0017] As a preferred embodiment of the LNG arrival reference price and freight calculation method based on multi-segment routes described in this invention, the method, when applied to the procurement release page of an LNG trading platform, further includes an automatic recalculation trigger mechanism. The independent query page is triggered manually by the user clicking the "Calculate" command; When any of the following changes occur on the procurement release page: the order of the shipping plant, the order of the unloading plants, the final receiving plant, or the demand at each plant, the original calculation results are automatically marked as invalid. Then, based on the updated input parameters, steps S2 to S7 are re-executed to generate a new arrival reference price.

[0018] The beneficial effects of this invention are: This invention solves the problem of fragmented processing of listed prices, route planning and freight calculation in existing LNG trading, enabling the station, demand, route and freight rate rules to form a reference price at the destination according to a unified data standard, thereby improving the consistency and comparability of price data; This invention solves the problem of only summarizing mileage and ignoring changes in remaining load after unloading in multi-unloading scenarios. By using an ordered path chain and a calculation method that gradually reduces the actual load capacity of each segment, each segment participates in cost calculation based on the actual amount of goods to be delivered. This avoids overestimation of freight costs caused by repeated billing of fixed loads, and the calculation results are more consistent with the actual cost structure of multi-unloading transportation. Attached Figure Description

[0019] Figure 1 This is a flowchart illustrating the overall process of the LNG arrival reference price and freight calculation method based on multiple routes according to the present invention.

[0020] Figure 2 This is a flowchart illustrating the overall process of calculating the reference price for LNG arrival at a multi-segment route, based on the method for calculating LNG arrival reference price and freight charges according to the present invention.

[0021] Figure 3 This is a block diagram showing the unloading sequence, transportation segments, and remaining capacity of the LNG arrival reference price and freight calculation method based on multi-segment routes according to the present invention.

[0022] Figure 4 This is a diagram illustrating the segmented freight and arrival reference price calculation model for the LNG arrival reference price and freight calculation method based on multi-segment routes of the present invention. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0024] like Figure 1 As shown, a method for calculating LNG arrival reference prices and freight rates based on multi-segment routes includes the following steps: S1. Obtain basic transaction data: The system receives the LNG delivery terminal selected by the user, one or more unloading terminals arranged in the transportation sequence, the final receiving terminal, and the demand of each unloading terminal and the final receiving terminal. And obtain the market list price corresponding to the shipping factory / station. Data including gas source region, gas source province, target province, station latitude and longitude, and station address. The sum of the demand at each station constitutes the initial loading capacity. The calculation formula is:

[0025] Site coordinate verification: For sites that have maintained latitude and longitude coordinates, the system directly uses the latitude and longitude coordinates; for sites that lack latitude and longitude coordinates but have addresses, the system calls the geocoding service to convert the addresses into latitude and longitude coordinates; for sites that cannot be located, the system prompts the user to reselect a site or maintain site information.

[0026] S2. Construct multiple transportation routes and determine segment load capacity: The system records the shipping station as... The unloading stations are numbered sequentially as follows: to The final receiving station is recorded as To form an orderly path chain Adjacent stations constitute transportation segments. ; S3, No. Actual remaining capacity of each transportation segment This is the sum of the remaining delivery demand at the end of this segment and all subsequent delivery stations, i.e. The amount decreases gradually as the unloading process progresses; the first Actual remaining capacity of each transportation segment The calculation formula is:

[0027] in, equal to initial load , According to the segment number The increase gradually decreases, reflecting the remaining cargo capacity of the vehicle after delivery at the preceding unloading station. S4. Implement dual-strategy route planning: For each transportation segment, adopt the shortest time route strategy separately. and real-time traffic route strategy Route planning was performed to obtain the mileage of each segment under two strategies. Expected duration and toll ,in Shortest time route strategy and real-time traffic route strategy Route data is generated for the same origin and destination stations at the same calculation time to ensure that the segmented mileage, duration and toll results of the two types of routes have the comparability of a unified time standard; Simultaneously, the total mileage under both strategies is summarized separately. , Total duration , and total toll , ; S5. Match fare rules and calculate segment transportation costs: For route strategies The system is based on the gas source area, origin and destination provinces, vehicle type, and segmented mileage. Match ton-kilometer freight rates from the freight rate rule table Toll fees included in the coefficient and area or vehicle compensation fees . No. Segmented transportation costs The calculation formula is:

[0028] in, For the variable freight portion that is linearly related to segmented ton-kilometers, The portion included in the toll calculation. This is the portion of the fixed compensation fee that is segmented; S6. Summarize the total truckload freight and convert it to unit freight: The system summarizes the costs of each segment to obtain the total truckload freight. Then, based on the initial load... Calculate the average unit freight cost for the entire order based on the base amount. and Therefore, the total freight cost for the shortest route is obtained. Average unit shipping cost for the entire order And real-time traffic routes and total freight cost per vehicle. Average unit shipping cost for the entire order Sufficient precision is maintained during the calculation process, and the results are only rounded to two decimal places when displayed; the route difference is calculated based on the unrounded result. S7. Calculate the average destination reference price for the entire order: The system adds the average unit freight cost per ton (RMB / ton) for the entire order to the market listed price. The average destination reference price for the entire trip under the two route strategies is obtained using the following formula: and Based on the principles of cost priority and time priority for routes with the same price, the recommended average destination reference price for the entire trip is selected from the two types of effective routes. And output; When only one type of route returns a valid result, that valid result is directly used as the recommended destination reference price; When both types of routes are valid, choose The corresponding route is used as the recommendation result; when and When the total estimated time is equal, the route with the shorter estimated total time is selected as the recommended result; The system outputs the following calculation results: detailed segmented routes, actual segmented loads, total freight cost Ck, average unit freight cost for the entire order, average destination reference price for the entire order, and recommended results for both route strategies. It also saves the input stations, demand at each station, route strategy, matched freight rate rule version, and calculation time as calculation records for use in procurement publishing, quotation reference, capacity comparison, and result verification.

[0029] Anomaly and Update Handling: If the listed price is missing, route planning fails, station coordinates are missing, demand quantities for each station are incomplete, or freight rate rules are missing, the system will output the corresponding anomaly reason and prompt for data maintenance. The independent query page uses a manual triggering method by the user clicking the "Calculate" command; on the procurement release page, when the shipping plant / station, unloading sequence, receiving plant / station, or demand quantity changes, the original calculation result will be marked as invalid and recalculated; after the listed price, station coordinates, or freight rate rules are updated, the system will read the updated data and generate a new calculation record in the next calculation request.

[0030] Specific examples: Reference Figure 2 As shown, this invention provides a method for calculating LNG arrival reference prices and freight rates based on multi-segment routes. The overall process includes: obtaining the plant / station prices, listed prices, and demand at each station; constructing an ordered route chain and determining segmented load capacities. ; execute segment by segment / Two route planning methods; matching fare rules to calculate segment costs; summarizing. And convert the unit freight cost ;Calculation of overlay listing price , Compare and output the recommendation results.

[0031] like Figure 3 As shown, shipping station The initial load capacity is 22 tons, after passing through the unloading station. After unloading 8 tons, the cargo was divided into sections. Remaining load capacity =14 tons, then through the unloading station After unloading 6 tons, the cargo was divided into sections. Remaining load capacity =8 tons, finally arriving at the receiving station The remaining 8 tons were delivered.

[0032] like Figure 4 As shown, the calculation model includes three types of inputs: listed price Demand at each station Segmented mileage With load capacity Time With toll ton-kilometer freight rates With toll coefficient With compensation Output the shortest time route and the total freight cost and reference price for the destination for real-time traffic routes, and generate recommendation results according to rules.

[0033] The parameters of a certain LNG transportation order are as follows: Factory / station listed price =4200 yuan / ton; Initial load =22 tons; Transportation route: Shipping station unloading station unloading station Final receiving station ; Demand at each station: Demand =8 tons, Demand =6 tons, Demand =8 tons Step S1: Calculate the actual remaining load capacity of each segment according to the formula. : Segmentation ( → ): = + + =8+6+8=22 tons; Segmentation ( → ): = + =6 + 8 = 14 tons; Segmentation ( → ): = =8 tons; visible > > The load capacity decreases gradually during the unloading process.

[0034] Step S2: Shortest time route strategy T of the dual-strategy route planning results: mileage =120 kilometers mileage =80 kilometers mileage =60 kilometers; Total Mileage =120+80+60=260 kilometers; Total toll =600 yuan; ton-kilometer freight rate =0.30 yuan / (ton) (kilometers) (For simplicity, the three segments use the same fare; in actual applications, they can be matched separately). Regional compensation fees =200 yuan; Toll calculation coefficient =1; Real-time traffic route strategy : mileage =135 kilometers mileage =92 kilometers mileage =70 kilometers; Total Mileage =135+92+70=297 kilometers; Total toll =100 yuan; ton-kilometer freight rate =0.28 yuan / (ton) kilometer); Regional compensation fees =200 yuan Toll calculation coefficient =1 Step S3: Calculate the cost of each segment of the shortest time route according to the formula:

[0035] =120×22×0.30=792 yuan; =80×14×0.30=336 yuan; =60×8×0.30=144 yuan; Total variable freight cost = 792 + 336 + 144 = 1272 yuan; Total freight for the whole vehicle =1272 + 1 × 600 + 200 = 2072 yuan; Average unit shipping cost for the entire order =2072÷22≈94.18 yuan / ton; Average destination reference price for the entire order =4200 + 94.18 = 4294.18 yuan / ton; Step S4: Calculate the cost of each segment of the real-time traffic route: =135×22×0.28=831.6 yuan; =92×14×0.28=360.64 yuan; =70×8×0.28=156.8 yuan; Total variable freight cost = 831.6 + 360.64 + 156.8 = 1349.04 yuan; Total freight for the whole vehicle =1349.04 + 1 × 100 + 200 = 1649.04 yuan; Average unit shipping cost for the entire order =1649.04÷22≈74.96 yuan / ton; Average destination reference price for the entire order =4200 + 74.96 = 4274.96 yuan / ton; Step S5: Recommended results selection due to =4274.96 yuan / ton =4294.18 yuan / ton. Based on the cost-priority rule, the system recommends real-time transportation routes and the average reference price for the entire order at the destination. =4274.96 yuan / ton.

[0036] Although the total mileage of this route increased by 37 kilometers (297 kilometers vs. 260 kilometers), the total freight cost of the whole truckload was reduced by 422.96 yuan through the combined effect of segmented actual load capacity, lower ton-kilometer freight rate and lower toll fees, and the average unit freight cost of the whole order was reduced by about 19.23 yuan / ton.

[0037] Comparative verification: If all segments are incorrectly calculated based on the initial load of 22 tons, the shortest-time route change freight cost would be: 260 × 22 × 0.30 = 1716 yuan, which is 444 yuan higher than the actual value of 1272 yuan, an overestimation of approximately 34.9%. This method... The step-by-step decreasing calculation makes the calculation results more consistent with the actual cost structure of the multi-unloading transportation process, effectively avoiding the problem of double billing.

[0038] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0039] The various embodiments in this specification are described in a related manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0040] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for calculating LNG arrival reference price and freight based on multi-segment routes, characterized in that, Includes the following steps: S1, the LNG receiving terminals, one or more unloading terminals in sequence, the final receiving terminal, and the demand of each unloading terminal and the final receiving terminal. And obtain the market list price corresponding to the shipping factory / station. The data includes the latitude and longitude of the station and the station address. The sum of the demand at each station constitutes the initial loading capacity. ; S2, Record the shipping station as... The unloading stations are numbered sequentially as follows: to The final receiving station is recorded as To form an orderly path chain Adjacent stations constitute transportation segments. ; S3, No. Actual remaining capacity of each transportation segment This is the sum of the remaining delivery demand at the end of this segment and all subsequent delivery stations, i.e. The amount decreases gradually as the unloading process progresses; S4. For each transportation segment Shortest time route strategy is adopted respectively and real-time traffic route strategy Route planning was performed to obtain the mileage of each segment under two strategies. Expected duration and toll ,in ; S5. Match the corresponding ton-kilometer freight rate for each segment from the freight rate rule table based on the gas source region, origin and destination provinces, vehicle type, and segment mileage. Toll fees included in the coefficient and compensation The transportation cost of each segment is calculated based on the segment mileage, the actual remaining capacity of each segment, and the matching parameters. ; S6. Summarize the segment costs under both route strategies to obtain the total freight cost for the shortest route. Real-time traffic routes and total freight cost per vehicle Then based on the initial load Calculate the average unit freight cost for the entire order based on the base. and ; S7. Add the average unit shipping cost of the entire order to the market listed price. The shortest route reference price is obtained respectively. Real-time transportation route arrival reference price Based on the principles of cost priority and time priority for routes with the same price, the recommended average destination reference price for the entire trip is selected from the two types of effective routes. And output it.

2. The method for calculating LNG arrival reference price and freight based on multi-segment routes according to claim 1, characterized in that: Step S1 also includes a site coordinate verification step: For sites that have already maintained their latitude and longitude coordinates, use the latitude and longitude data directly; for sites that lack latitude and longitude coordinates but have addresses, call the geocoding service to convert the addresses into latitude and longitude coordinates; for sites that cannot be located, output a prompt message to guide users to reselect a site or maintain site information.

3. The method for calculating LNG arrival reference price and freight based on multi-segment routes according to claim 1, characterized in that: The first step S3 Actual remaining capacity of each transportation segment The calculation formula is: in, equal to initial load , According to the segment number The increase gradually decreases, reflecting the remaining cargo capacity of the vehicle after it has completed delivery at the preceding unloading station.

4. The method for calculating LNG arrival reference price and freight based on multi-segment routes according to claim 1, characterized in that: The shortest time route strategy described in step S4 and real-time traffic route strategy Route data is generated for the same origin and destination stations at the same calculation time to ensure the comparability of segmented mileage, duration, and toll results for the two types of routes with a unified time caliber; at the same time, the total mileage under the two strategies is summarized separately. , Total duration , and total toll , .

5. The method for calculating LNG arrival reference price and freight based on multi-segment routes according to claim 1, characterized in that: The matching dimensions of the freight rate rule table mentioned in step S5 include gas source region, gas source province, target province, vehicle type, and mileage range; ton-kilometer freight rate. The freight rate is determined based on the regional combination and mileage range to which each transportation segment belongs; different segments may correspond to different ton-kilometer freight rates; toll fees are included in the coefficient. This is used to control whether toll fees are included in transportation costs in full or at a discounted rate; Compensation This includes regional compensation fees, vehicle fixed cost compensation, or other additional fees included in accordance with regulations.

6. The method for calculating LNG arrival reference price and freight based on multi-segment routes according to claim 5, characterized in that: The segmented transportation costs mentioned in step S5 The calculation formula is: in, For the variable freight portion that is linearly related to segmented ton-kilometers, The portion included in the toll calculation. This is the portion of the fixed compensation fee that is segmented; Total freight for the whole vehicle The cost is obtained by accumulating the transportation costs of each segment. Full precision is retained during the calculation process, and the final result is rounded to two decimal places only when it is displayed.

7. The method for calculating LNG arrival reference price and freight based on multi-segment routes according to claim 1, characterized in that: The cost-priority and time-priority rules mentioned in step S7 are as follows: When only one type of route returns a valid result, that valid result is directly used as the recommended destination reference price; When both types of routes are valid, choose The corresponding route is used as the recommendation result; when and If the total estimated time is the same, the route with the shorter estimated total time will be recommended.

8. The method for calculating LNG arrival reference price and freight based on multi-segment routes according to claim 1, characterized in that: The method also includes a step for tracing and saving the calculation results: The input station information, demand at each station, unloading order, route strategy type, matched freight rate rule version number, calculation timestamp, and calculation results are associated and saved as a calculation record for use in procurement release, quotation reference, capacity comparison, and result verification. The saved calculation results include segmented route details, segmented actual load, total freight cost of the whole vehicle, average unit freight cost of the whole order, and average reference price of the whole order at the destination for both route strategies.

9. The method for calculating LNG arrival reference price and freight based on multi-segment routes according to claim 1, characterized in that: The method also includes anomaly handling and data update steps: When the listed price is missing, route planning fails, station coordinates are missing, demand at each station is incomplete, or fare rules are missing, the corresponding error reason will be output and a prompt will be made to maintain the relevant data. When the listed price, station coordinates, or fare rules are updated, the updated data is read in the next calculation request and a new calculation record is generated, while the original historical records remain unchanged.

10. The method for calculating LNG arrival reference price and freight based on multi-segment routes according to claim 1, characterized in that: When the method is applied to the procurement release page of the LNG trading platform, it also includes an automatic recalculation trigger mechanism: The independent query page is triggered manually by the user clicking the "Calculate" command; When any of the following changes occur on the procurement release page: the order of the shipping plant, the order of the unloading plants, the final receiving plant, or the demand at each plant, the original calculation results are automatically marked as invalid. Then, based on the updated input parameters, steps S2 to S7 are re-executed to generate a new arrival reference price.

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