An intelligent operation and maintenance management system for power distribution based on port shore power

Abstract

The present invention belongs to the technical field of port shore power, and specifically is an intelligent operation and maintenance management system for power distribution based on port shore power. The system evaluates the response capability of the power distribution facilities of each shore power zone of the target port to the current power distribution request of its zone according to the relationship between the cumulative demand power distribution power of the shore power zone and the benchmark reference power, and formulates the current target port power distribution plan based on the evaluation result. The shore power distribution resources of the target port are flexibly allocated in two forms: autonomous power distribution of each shore power zone, autonomous power distribution of each effective power distribution zone, and coordinated power distribution of each restricted power distribution zone. During the execution of the current target port power distribution plan, the power distribution quality of each shore power zone at each detection time point is evaluated, and a probability analysis and reporting mechanism for the operation abnormality of the distribution facilities when the power distribution quality does not meet the standard is launched, which is helpful to maintain the stable operation of the shore power distribution system of the target port and ensure the continuity of the operation of the target port and the reliability of operation.

Description

Technical Field

[0001] The present invention belongs to the technical field of port shore power, and specifically relates to an intelligent operation and maintenance management system for power distribution based on port shore power. Background Art

[0002] The port shore power system allows ships at port to shut down their onboard generators and use shore power instead, thereby reducing noise pollution, air pollution and greenhouse gas emissions. However, the complexity and high reliability requirements of the shore power system pose new challenges to operation and maintenance management. The traditional operation and maintenance management model can no longer meet the needs of modern port shore power systems. Therefore, it is particularly important to develop a power distribution operation and maintenance management system based on intelligent technology.

[0003] In the prior art, there are also some solutions related to port shore power operation and maintenance management. For example, the Chinese patent application publication number CN112260270A is a port shore power intelligent orderly power supply control method and system, which provides the option of whether to accept orderly power supply management for the shore power piles that supply power to the ship. If you choose to accept orderly power supply management, the corresponding shore power piles are orderly shore power piles, and power is allocated preferentially. If you choose to accept unordered power supply management, the corresponding shore power piles are conventional shore power piles. According to the remaining power after allocating the power of the orderly shore power piles, the number of conventional shore power piles to be put into use is determined, the available distribution power information of the port is obtained, and the power consumption of the orderly shore power piles and the conventional shore power piles is adjusted according to the total load of the port, which can not only ensure the normal operation power demand of the port terminal, but also ensure the normal power demand of the ships docked at the port.

[0004] Another Chinese patent application with publication number CN105356608A is a port shore power integrated management system, which includes a port shore power integrated management platform, port shore-based power supply equipment and shore power equipment controller. The port shore power integrated management platform consists of an operation monitoring module, a data acquisition module, an alarm management module and a statistical analysis module. The shore power equipment controller includes a master controller and a slave controller, which consists of an optical fiber communication unit, an RS485 communication unit and an information volume acquisition unit, and can effectively realize the working status monitoring of the port shore power equipment and ensure the safe operation of the port shore-based power supply equipment.

[0005] Although the above scheme proposes some solutions to the operation and maintenance management of port shore power, the existing technology still has the following limitations, specifically: 1. The existing port shore power operation and maintenance management is usually implemented in the form of autonomous power distribution by each shore power zone, and the distribution response judgment condition is whether the upper limit output power of the distribution facility meets the cumulative required distribution power of the ship. On the one hand, the transformer properties, inverter properties and cable properties of the shore power zone configuration are ignored to evaluate the response capability and formulate the distribution plan, which lacks flexibility. On the other hand, the actual distribution capacity of the shore power zone cannot be dynamically considered, which may cause waste of resources.

[0006] 2. The existing technology of port shore power operation and maintenance management is usually passive maintenance or inspection on fixed maintenance dates at the power distribution maintenance level. Operation maintenance has never been considered synchronously during the power distribution process, so that potential problems cannot be discovered in advance and repaired by analyzing the operation self-inspection data during the power distribution process, reducing the reliability and stability of the entire port shore power system. Summary of the invention

[0007] In order to overcome the shortcomings of the background technology, an embodiment of the present invention provides a power distribution intelligent operation and maintenance management system based on port shore power, which can effectively solve the problems involved in the above-mentioned background technology.

[0008] The purpose of the present invention can be achieved through the following technical solutions: A power distribution intelligent operation and maintenance management system based on port shore power, including: a power distribution request receiving module, a power distribution plan formulation module, a power distribution quality assessment module, a power distribution facility abnormality reporting module and a cloud database.

[0009] The power distribution request receiving module is connected to the power distribution plan formulation module, the power distribution plan formulation module is connected to the power distribution quality assessment module, the power distribution quality assessment module is connected to the power distribution facility abnormality reporting module, and the cloud database is respectively connected to the power distribution plan formulation module, the power distribution quality assessment module, and the power distribution facility abnormality reporting module.

[0010] The power distribution request receiving module is used to receive the power distribution requests of each berthed ship in each shore power zone of the target port in real time, including the required power distribution power and required power distribution frequency, and to organize the cumulative required power distribution power and required power distribution frequency sequence of each shore power zone of the current target port.

[0011] The power distribution plan formulation module is used to evaluate the response capability of the power distribution facilities of each shore power zone of the target port to the current power distribution request of its zone according to the transformer properties, inverter properties and cable properties of the shore power zone of the target port, so as to formulate the current power distribution plan of the target port.

[0012] The power distribution quality assessment module is used to plan the various detection time points during the execution of the current target port power distribution plan, collect the power distribution feedback data of each distribution ship at each detection time point, calculate the power distribution quality assessment index of each shore power partition of the target port at each detection time point, and make a judgment on whether the power distribution quality meets the standard.

[0013] The power distribution facility abnormality reporting module is used to record a shore power zone as an abnormal zone and retrieve the operation self-inspection data of each power distribution facility in the zone at the detection time point when the power distribution quality of a shore power zone in the target port is judged to be not up to standard at a certain detection time point, evaluate the operation abnormality probability of each power distribution facility in the abnormal zone and report it.

[0014] The cloud database is used to store the standard attribute parameter set of the shore power distribution facilities in the target port, store the corresponding permitted thresholds of the distribution voltage abnormality, average distribution harmonic interference, and average distribution frequency deviation preset in the shore power distribution specifications of the target port, store the preset safe working temperature thresholds and safe working sound pressure level value ranges of the transformer specifications of the shore power distribution of the target port, and store the preset distribution quality assessment index compliance thresholds per unit time of the shore power distribution of the target port.

[0015] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects: (1) The present invention evaluates the response capability of the power distribution facilities of each shore power zone of the target port to the current power distribution request of its zone according to the relationship between the cumulative demand power distribution power of the shore power zone and the benchmark reference power, which helps to accurately grasp the actual power supply response capability of each shore power zone of the target port to each ship in its zone, fits the actual power consumption scenario, and thus provides a reliable basis for formulating a reasonable power distribution plan.

[0016] (2) The present invention develops a current target port power distribution plan based on the response capability evaluation index of the power distribution facilities of each shore power zone of the target port for the current power distribution request of the zone, and flexibly allocates the shore power distribution resources of the target port in two forms: autonomous power distribution of each shore power zone, autonomous power distribution of each effective power distribution zone, and coordinated power distribution of each restricted power distribution zone, so as to help improve the operating efficiency of the entire port shore power system and ensure the efficient implementation of various operations in the target port.

[0017] (3) The present invention plans the various detection time points during the execution of the current target port power distribution plan, evaluates the power distribution quality of each shore power zone of the target port at each detection time point, and develops a probability analysis and reporting mechanism for the operation abnormality of the power distribution facilities when the power distribution quality does not meet the standard, which helps to maintain the stable operation of the shore power distribution system of the target port and ensure the continuity of the target port's operations and the reliability of its operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

[0019] Figure 1 It is a schematic diagram of module connection of the present invention.

[0020] Figure 2 It is a schematic diagram of the shore power partition structure of the target port of the present invention.

[0021] Figure 3 A logical schematic diagram of the evaluation of the response capability of the power distribution facilities of the shore power zone of the target port of the present invention to the current power distribution request of its zone.

[0022] Figure symbols: 1. Shore power pile; 2. Berth for docked ships. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Reference Figure 1 As shown, the present invention provides a power distribution intelligent operation and maintenance management system based on port shore power, including: a power distribution request receiving module, a power distribution plan formulation module, a power distribution quality assessment module, a power distribution facility abnormality reporting module and a cloud database.

[0025] The power distribution request receiving module is connected to the power distribution plan formulation module, the power distribution plan formulation module is connected to the power distribution quality assessment module, the power distribution quality assessment module is connected to the power distribution facility abnormality reporting module, and the cloud database is respectively connected to the power distribution plan formulation module, the power distribution quality assessment module, and the power distribution facility abnormality reporting module.

[0026] Reference Figure 2 As shown, the power distribution request receiving module is used to receive the power distribution requests of each docked ship in each shore power partition of the target port in real time, including the required power distribution power and the required power distribution frequency, and to organize the cumulative required power distribution power and required power distribution frequency sequences of each shore power partition of the current target port.

[0027] It should be noted that the process of sorting out the cumulative required distribution power and required distribution frequency sequence of each shore power zone of the above-mentioned current target port is: accumulating the required distribution power of each docked ship in the same shore power zone of the target port to obtain the cumulative required distribution power of the shore power zone, and adding the required distribution frequency of each docked ship in the same shore power zone of the target port to the sequence one by one to obtain the required distribution frequency sequence of the shore power zone.

[0028] The power distribution plan formulation module is used to evaluate the response capability of the power distribution facilities of each shore power zone of the target port to the current power distribution request of its zone according to the transformer properties, inverter properties and cable properties of the shore power zone of the target port, so as to formulate the current power distribution plan of the target port.

[0029] Reference Figure 3As shown, specifically, the evaluation of the response capability of the distribution facilities of each shore power zone of the target port to the current distribution request of its zone includes: extracting the standard attribute parameter set of the shore power zone distribution facilities of the target port stored in the cloud database, including the upper limit output power of the transformer and each standard transformation ratio, the upper limit current of the cable, the upper limit output power of the inverter, each output frequency segment interval and its matching power factor, comparing the upper limit output power of the transformer and the upper limit output power of the inverter, and taking the smaller one as the benchmark reference power, and taking the maximum standard transformation ratio of the transformer as the benchmark reference transformation ratio of the transformer.

[0030] If the cumulative demand distribution power of a shore power section of the current target port is greater than the benchmark reference power, the response capability evaluation index of the distribution facilities of the shore power section for the current distribution request of the section is set to 0.

[0031] If the cumulative required power distribution power of a shore power partition of the current target port is less than or equal to the benchmark reference power, the required power distribution frequency of each berthed ship in the shore power partition is extracted and the matching power factor corresponding to the inverter output frequency range is obtained. , The numbers of the ships docked in the shore power zone. , combined with the transformer's reference transformer ratio and the upper limit current of the cable , analyze the response upper limit distribution power of the shore power zone distribution facility for each docked ship in its zone. If the response upper limit distribution power of the shore power zone distribution facility for a docked ship in its zone is greater than the required distribution power of the docked ship, and the difference between the response upper limit distribution power and the required distribution power is greater than the preset safety margin power, it means that the shore power zone distribution facility can effectively respond to the distribution request of the docked ship in its zone, and the docked ship is recorded as a suitable ship. In this way, the number of suitable ships in the shore power zone is counted and its ratio to the total number of docked ships in the shore power zone is used as the response capacity evaluation index of the shore power zone distribution facility for the current distribution request of its zone.

[0032] In summary, the response capabilities of the power distribution facilities of each shore power zone of the target port to the current power distribution requests of its zone are evaluated.

[0033] Specifically, the specific analysis formula of the shore power zone distribution facility for the response upper limit distribution power of each docked ship in its zone is: ,in The preset supply voltage of the grid for the target port.

[0034] The embodiment of the present invention evaluates the response capability of the power distribution facilities of each shore power zone of the target port to the current power distribution request of its zone according to the relationship between the cumulative demand power distribution power of the shore power zone and the benchmark reference power. This helps to accurately grasp the actual power supply response capability of each shore power zone of the target port to each ship in its zone, fits the actual power consumption scenario, and thus provides a reliable basis for formulating a reasonable power distribution plan.

[0035] Specifically, the formulation of the current target port power distribution plan includes: extracting the response capability evaluation index of the power distribution facilities of each shore power partition of the target port to the current power distribution request of the partition; , The number of each shore power zone of the target port. .

[0036] like , then formulate the current target port power distribution plan for autonomous power distribution in each shore power zone.

[0037] like , then screen the effective distribution zones and restricted distribution zones in the target port, determine the surplus distribution power of each effective distribution zone in the target port for each docked ship in its zone and the shortage distribution power of each restricted distribution zone for each docked ship in its zone, and construct the surplus distribution power table of the effective distribution zones of the target port and the shortage distribution power table of the restricted distribution zones in the order of power from large to small, and compare and obtain the adjustable shore power piles of each docked ship in each restricted distribution zone. If a docked ship in a restricted distribution zone has no adjustable shore power pile, a pop-up window of waiting for distribution will be fed back to the docked ship in the restricted distribution zone for prompting, so as to formulate the current target port distribution plan for autonomous distribution of each effective distribution zone and coordinated distribution of each restricted distribution zone.

[0038] It should be noted that the process of determining the surplus distribution power of each effective distribution zone in the target port for each docked ship in its zone is as follows: the difference between the response upper limit distribution power of each effective distribution zone in the target port for each docked ship in its zone and the required distribution power of the corresponding docked ship is further subtracted from the preset safety margin power to obtain the surplus distribution power of each effective distribution zone in the target port for each docked ship in its zone.

[0039] It should be noted that the above-mentioned preset safety margin power is derived from the larger value of the transformer design reserved power margin and the inverter design reserved power margin specified in the technical specifications for distribution facilities. It is used to cope with fluctuations in port ship power consumption and avoid high-load operation of distribution facilities.

[0040] The process of determining the power shortage of each restricted power distribution zone in the above-mentioned target port for each docked ship in its zone is as follows: the difference between the response upper limit power distribution power of each restricted power distribution zone in the target port for each docked ship in its zone and the required power distribution power of the corresponding docked ship is further subtracted from the preset safety margin power, the calculated difference is converted to an absolute value, and the calculated difference after the absolute value is used as the power shortage of each restricted power distribution zone in the target port for each docked ship in its zone.

[0041] It should also be noted that the specific process of obtaining the adjustable shore power piles for each docked ship in each restricted distribution zone by comparing the above-mentioned comparison is as follows: compare the surplus distribution power ranked first in the surplus distribution power table of the effective distribution zone with the shortage distribution power ranked first in the shortage distribution power table of the restricted distribution zone; if the comparison relationship is greater than or equal to, the shore power pile connected to the docked ship corresponding to the surplus distribution power ranked first in the surplus distribution power table of the effective distribution zone is used as the adjustable shore power pile for the docked ship corresponding to the shortage distribution power ranked first in the shortage distribution power table of the restricted distribution zone; if the calculated difference between the surplus distribution power ranked first in the surplus distribution power table of the effective distribution zone and the shortage distribution power ranked first in the shortage distribution power table of the restricted distribution zone is still greater than 0, the calculated difference is further compared with the surplus distribution power ranked first in the surplus distribution power table of the effective distribution zone. The second-ranked surplus distribution power in the surplus distribution power table is accumulated, and the accumulated value is compared with the second-ranked shortage distribution power in the shortage distribution power table of the restricted distribution zone. If the comparison relationship is greater than or equal to, the shore power piles connected to the docked ships corresponding to the first and second surplus distribution powers in the surplus distribution power table of the effective distribution zone are used together as the adjustable shore power piles for the docked ships corresponding to the second-ranked shortage distribution power in the shortage distribution power table of the restricted distribution zone. If the comparison relationship is less than, it means that the second-ranked shortage distribution power in the shortage distribution power table of the restricted distribution zone has no adjustable shore power pile for the docked ship, and the accumulated value is compared with the third-ranked shortage distribution power in the shortage distribution power table of the restricted distribution zone. Similarly, the adjustable shore power piles for each docked ship in each restricted distribution zone are obtained by comparison.

[0042] Specifically, the screening of the effective power distribution zones and the restricted power distribution zones in the target port includes: taking the shore power zones whose response capability evaluation index of the target port power distribution facilities to the current power distribution request of the zone is less than 1 as the restricted power distribution zones, and taking the remaining shore power zones as the effective power distribution zones.

[0043] The embodiment of the present invention develops a current target port power distribution plan based on the response capability evaluation index of the power distribution facilities of each shore power zone of the target port for the current power distribution request of its zone, and flexibly allocates the shore power distribution resources of the target port in two forms: autonomous power distribution of each shore power zone, autonomous power distribution of each effective power distribution zone, and coordinated power distribution of each restricted power distribution zone, to help improve the operating efficiency of the entire port shore power system and ensure the efficient implementation of various operations in the target port.

[0044] The power distribution quality assessment module is used to plan the various detection time points during the execution of the current target port power distribution plan, collect the power distribution feedback data of each distribution ship at each detection time point, calculate the power distribution quality assessment index of each shore power partition of the target port at each detection time point, and make a judgment on whether the power distribution quality meets the standard.

[0045] Specifically, the calculation of the distribution quality evaluation index of each shore power partition at each detection time point of the target port includes: according to the distribution feedback data of each distribution ship at each detection time point, including the deviation voltage of each phase, the harmonic content of each phase current and the distribution deviation frequency, the distribution voltage abnormality, the distribution harmonic interference degree and the distribution frequency deviation degree of each distribution ship at each detection time point are analyzed, and the distribution voltage abnormality, the distribution harmonic interference degree and the distribution frequency deviation degree of each distribution ship belonging to the same shore power partition at the same detection time point are respectively averaged to obtain the average distribution voltage abnormality at each detection time point of each shore power partition of the target port. , average power distribution harmonic interference level and the average distribution frequency deviation , is the number of each detection time point, , according to the formula Obtain the power distribution quality evaluation indicators of each shore power partition at each detection time point of the target port, including They are the corresponding permitted thresholds for the abnormality degree of distribution voltage, the average distribution harmonic interference degree, and the average distribution frequency deviation degree preset in the target port shore power distribution specification stored in the cloud database.

[0046] Specifically, the analysis of the degree of abnormality of the distribution voltage of each distribution ship at each detection time point includes: extracting the maximum phase deviation voltage among the phase deviation voltages of each distribution ship at each detection time point, and calculating the standard deviation between the phase deviation voltages, multiplying the ratio analysis result of the maximum phase deviation voltage among the phase deviation voltages and a preset single-phase reasonable deviation voltage safety threshold with the ratio analysis result of the standard deviation between the phase deviation voltages and a preset three-phase voltage allowable standard deviation threshold, and taking the product as the degree of abnormality of the distribution voltage, thereby obtaining the degree of abnormality of the distribution voltage of each distribution ship at each detection time point.

[0047] It should be noted that the specific analysis process of the distribution harmonic interference degree of each distribution ship at each detection time point is as follows: extract the harmonic content of each phase current of each distribution ship at each detection time point, the harmonic content includes the amplitude of each harmonic current, further collect the fundamental current amplitude of each phase current of each distribution ship at each detection time point, calculate the total harmonic distortion rate of each phase current of each distribution ship at each detection time point, screen the maximum value of the total harmonic distortion rate of each phase current as the distribution harmonic interference degree, thereby obtaining the distribution harmonic interference degree of each distribution ship at each detection time point. It should be noted that the above-mentioned calculation formula for the total harmonic distortion rate of current is a general electrical formula, which will not be repeated here.

[0048] It should also be noted that the specific analysis process of the degree of distribution frequency deviation of each distribution ship at each detection time point is as follows: the distribution deviation frequency of each distribution ship at each detection time point is compared with the preset reasonable distribution deviation frequency threshold. If the comparison relationship is less than or equal to, the distribution frequency deviation degree is set to 0; if the comparison relationship is greater than, the calculated difference between the distribution deviation frequency and the preset reasonable distribution deviation frequency threshold is further subjected to ratio analysis with the preset reasonable distribution deviation frequency threshold, and the ratio analysis result is used as the distribution frequency deviation degree, thereby obtaining the distribution frequency deviation degree of each distribution ship at each detection time point.

[0049] Specifically, the condition for judging whether the power distribution quality meets the standard is that the power distribution quality evaluation index at the detection time point of the shore power partition of the target port is greater than or equal to the preset power distribution quality evaluation index meeting standard threshold per unit time of the shore power partition of the target port stored in the cloud database.

[0050] The power distribution facility abnormality reporting module is used to record a shore power zone as an abnormal zone and retrieve the operation self-inspection data of each power distribution facility in the zone at the detection time point when the power distribution quality of a shore power zone in the target port is judged to be not up to standard at a certain detection time point, evaluate the operation abnormality probability of each power distribution facility in the abnormal zone and report it.

[0051] Specifically, the evaluation of the probability of abnormal operation of each distribution facility in the abnormal zone includes: extracting the average distribution voltage abnormality degree of the abnormal zone at the detection time point according to the operation self-test data of each distribution facility in the abnormal zone at the detection time point, including the abnormal operating temperature state indicators and abnormal operating sound state indicators of the transformer, inverter, and cable; , according to the formula Analyze the abnormal operation probability of transformers in abnormal zones, where They are respectively the abnormal working temperature status indicator and the abnormal working noise status indicator of the abnormal partition transformer at the detection time point.

[0052] Similarly, the probability of abnormal operation of the inverter and cables in the abnormal partition is analyzed.

[0053] Specifically, the The specific acquisition process includes: retrieving the highest operating temperature value of the abnormal partition transformer within the preset period before the detection time point and maximum sound pressure level , and the preset safe operating temperature threshold of the transformer specification requirements of the shore power partition of the target port stored in the cloud database Compare with the safe working sound pressure level value range, according to the formula , The abnormal temperature status indicator and abnormal sound status indicator of the abnormal partition transformer in the preset period before the detection time point are obtained respectively, where They are the calculated mean of the upper and lower limits of the safe working sound pressure level numerical range preset for the target port shore power zone transformer specification requirements, and the calculated difference between the calculated mean and the lower limit of the range.

[0054] The embodiment of the present invention plans each detection time point during the execution of the current target port power distribution plan, evaluates the power distribution quality of each shore power partition of the target port at each detection time point, and develops a probability analysis and reporting mechanism for the operation abnormality of the power distribution facilities when the power distribution quality does not meet the standard, which helps to maintain the stable operation of the shore power distribution system of the target port and ensure the continuity of the target port's operations and the reliability of operations.

[0055] The cloud database is used to store the standard attribute parameter set of the shore power distribution facilities of the target port, store the corresponding permitted thresholds of the distribution voltage abnormality, average distribution harmonic interference, and average distribution frequency deviation preset in the shore power distribution specifications of the target port, store the safe working temperature thresholds and safe working sound pressure level value ranges preset in the shore power distribution transformer specifications of the target port, and store the preset distribution quality assessment index compliance thresholds per unit time of the shore power distribution of the target port.

[0056] The data sources in the cloud database of this embodiment are shown in Table 1 below.

[0057] Table 1 Detailed description of data sources in cloud database

[0058]

[0059] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the present invention, they should all fall within the protection scope of the present invention.

Claims

1. An intelligent power distribution operation and maintenance management system based on port shore power, characterized in that: include: The power distribution request receiving module is used to receive the power distribution requests of each berthed ship in each shore power partition of the target port in real time, including the required power distribution power and required power distribution frequency, and to sort out the cumulative required power distribution power and required power distribution frequency sequence of each shore power partition of the current target port; The power distribution plan formulation module is used to evaluate the response capability of the power distribution facilities of each shore power zone of the target port to the current power distribution request of the zone according to the transformer attributes, inverter attributes and cable attributes of the shore power zone of the target port, so as to formulate the current power distribution plan of the target port; If the cumulative demand distribution power of a shore power partition of the current target port is greater than the benchmark reference power, the response capability evaluation index of the distribution facilities of the shore power partition for the current distribution request of the partition is set to 0; If the cumulative required power distribution power of a shore power partition of the current target port is less than or equal to the benchmark reference power, the required power distribution frequency of each berthed ship in the shore power partition is extracted and the matching power factor corresponding to the inverter output frequency range is obtained. , The numbers of the ships docked in the shore power zone. , combined with the transformer's reference transformation ratio and the upper limit current of the cable , analyze the upper limit power distribution power of the shore power zone distribution facility for each docked ship in its zone. If the upper limit power distribution power of the shore power zone distribution facility for a docked ship in its zone is greater than the required power distribution power of the docked ship, and the difference between the upper limit power distribution power and the required power distribution power is greater than the preset safety margin power, it means that the shore power zone distribution facility can effectively respond to the power distribution request of the docked ship in its zone, and the docked ship is recorded as a suitable ship. The number of suitable ships in the shore power zone is counted and the ratio of the number of ships to the total number of docked ships in the shore power zone is used as the response capability evaluation index of the shore power zone distribution facility for the current power distribution request of its zone; Formulate the current target port power distribution plan, including: extract the response capacity evaluation index of the power distribution facilities of each shore power zone of the target port to the current power distribution request of its zone , The number of each shore power zone of the target port. ; like , then formulate the current target port power distribution plan for autonomous power distribution in each shore power zone; like , then screen the effective distribution zones and restricted distribution zones in the target port, determine the surplus distribution power of each effective distribution zone in the target port for each docked ship in its zone and the shortage distribution power of each restricted distribution zone for each docked ship in its zone, and construct the surplus distribution power table of the effective distribution zones of the target port and the shortage distribution power table of the restricted distribution zones in the order of power from large to small, and compare and obtain the adjustable shore power piles of each docked ship in each restricted distribution zone. If a docked ship in a restricted distribution zone has no adjustable shore power pile, then the docked ship in the restricted distribution zone will be prompted to wait for the distribution pop-up window, thereby formulating the current target port distribution plan for autonomous distribution of each effective distribution zone and coordinated distribution of each restricted distribution zone; The power distribution quality assessment module is used to plan the various test time points during the execution of the power distribution plan of the current target port, collect the power distribution feedback data of each power distribution ship at each test time point, calculate the power distribution quality assessment index of each shore power partition of the target port at each test time point, and make a judgment on whether the power distribution quality meets the standard; The power distribution facility abnormality reporting module is used to record the shore power zone as an abnormal zone and retrieve the operation self-test data of each power distribution facility in the zone at the detection time point when the power distribution quality of a shore power zone at the target port does not meet the standard at a certain detection time point, evaluate the operation abnormality probability of each power distribution facility in the abnormal zone and report it; The cloud database is used to store the standard attribute parameter set of the shore power distribution facilities in the target port, store the corresponding permitted thresholds of the distribution voltage abnormality, average distribution harmonic interference, and average distribution frequency deviation preset in the shore power distribution specifications of the target port, store the preset safe working temperature thresholds and safe working sound pressure level value ranges of the transformer specifications of the shore power distribution of the target port, and store the preset distribution quality assessment index compliance thresholds per unit time of the shore power distribution of the target port.

2. According to claim 1, a power distribution intelligent operation and maintenance management system based on port shore power is characterized in that: The analysis method of the benchmark reference power is as follows: extract the standard attribute parameter set of the shore power distribution facilities of the target port stored in the cloud database, including the upper limit output power of the transformer and each standard transformation ratio, the upper limit current of the cable, the upper limit output power of the inverter, each output frequency range and its matching power factor, compare the upper limit output power of the transformer and the upper limit output power of the inverter, and take the smaller value as the benchmark reference power, and take the maximum standard transformation ratio of the transformer as the benchmark reference transformation ratio of the transformer; In summary, the response capabilities of the power distribution facilities of each shore power zone of the target port to the current power distribution requests of its zone are evaluated.

3. According to claim 2, a power distribution intelligent operation and maintenance management system based on port shore power is characterized in that: The specific analysis formula of the response upper limit distribution power of the shore power distribution facility for each docked ship in its zone is: ,in The preset supply voltage of the grid for the target port.

4. According to claim 1, a power distribution intelligent operation and maintenance management system based on port shore power is characterized in that: The screening of the effective power distribution zones and the restricted power distribution zones in the target port includes: taking the shore power zones whose response capability evaluation index of the target port power distribution facilities to the current power distribution request of the zone is less than 1 as the restricted power distribution zones, and taking the remaining shore power zones as the effective power distribution zones.

5. According to claim 1, a power distribution intelligent operation and maintenance management system based on port shore power is characterized in that: The calculation of the distribution quality evaluation index of each shore power partition at each detection time point of the target port includes: analyzing the distribution voltage abnormality, distribution harmonic interference degree and distribution frequency deviation degree of each distribution ship at each detection time point according to the distribution feedback data of each distribution ship at each detection time point, including each phase deviation voltage, each phase current harmonic content and distribution deviation frequency, and calculating the average of the distribution voltage abnormality, distribution harmonic interference degree and distribution frequency deviation degree of each distribution ship belonging to the same shore power partition at the same detection time point, so as to obtain the average distribution voltage abnormality at each detection time point of each shore power partition of the target port. , average power distribution harmonic interference level and the average distribution frequency deviation , is the number of each detection time point, , according to the formula Obtain the power distribution quality evaluation indicators of each shore power partition at each detection time point of the target port, including They are the corresponding permitted thresholds for the abnormality degree of distribution voltage, the average distribution harmonic interference degree, and the average distribution frequency deviation degree preset in the target port shore power distribution specification stored in the cloud database.

6. According to claim 5, a power distribution intelligent operation and maintenance management system based on port shore power is characterized in that: The analysis of the degree of abnormality of the distribution voltage at each detection time point of each distribution ship includes: extracting the maximum phase deviation voltage among the phase deviation voltages at each detection time point of each distribution ship, and calculating the standard deviation between the phase deviation voltages, multiplying the ratio analysis result of the maximum phase deviation voltage among the phase deviation voltages and a preset single-phase reasonable deviation voltage safety threshold with the ratio analysis result of the standard deviation between the phase deviation voltages and a preset three-phase voltage allowable standard deviation threshold, and taking the product as the degree of abnormality of the distribution voltage, thereby obtaining the degree of abnormality of the distribution voltage at each detection time point of each distribution ship.

7. According to claim 5, a power distribution intelligent operation and maintenance management system based on port shore power is characterized in that: The condition for judging whether the power distribution quality meets the standard is that the power distribution quality evaluation index at the detection time point of the shore power partition of the target port is greater than or equal to the preset power distribution quality evaluation index meeting standard threshold per unit time of the shore power partition of the target port stored in the cloud database.

8. The intelligent operation and maintenance management system for power distribution based on port shore power according to claim 5 is characterized by: The evaluation of the probability of abnormal operation of each power distribution facility in the abnormal zone includes: extracting the average power distribution voltage abnormality degree of the abnormal zone at the detection time point according to the operation self-test data of each power distribution facility in the abnormal zone at the detection time point, including the abnormal operating temperature state indication and abnormal operating sound state indication of the transformer, inverter and cable; , according to the formula Analyze the abnormal operation probability of transformers in abnormal zones, where They are respectively the abnormal working temperature status indication and the abnormal working noise status indication of the abnormal partition transformer at the detection time point; Similarly, the probability of abnormal operation of the inverter and cables in the abnormal partition is analyzed.

9. The intelligent operation and maintenance management system for power distribution based on port shore power according to claim 8 is characterized by: Said The specific acquisition process includes: retrieving the highest operating temperature value of the abnormal partition transformer within the preset period before the detection time point and maximum sound pressure level , and the preset safe operating temperature threshold of the transformer specification requirements of the shore power partition of the target port stored in the cloud database Compare with the safe working sound pressure level value range, according to the formula , The abnormal temperature status indicator and abnormal sound status indicator of the abnormal partition transformer in the preset period before the detection time point are obtained respectively, where They are the calculated mean of the upper and lower limits of the safe working sound pressure level numerical range preset for the target port shore power zone transformer specification requirements, and the calculated difference between the calculated mean and the lower limit of the range.

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