A sulfur hexafluoride insulated ring main unit and power distribution system

Abstract

This invention relates to a sulfur hexafluoride (SF6) insulated ring main unit and its power distribution system, comprising a ring main unit power distribution platform, a ring main unit information database, a ring main unit operating condition unit, a power distribution interference unit, a ring network allocation unit, a power control unit, and a power distribution management unit. This invention analyzes the power distribution stability performance of the target ring main unit from two aspects: its operating characteristics and operating parameters. It also analyzes the degree of SF6 gas interference in the target ring main unit to improve its operational stability and continuity. Furthermore, it conducts a risk analysis of the ring network allocation performance based on the operating condition information of the target ring main unit through information feedback, thereby improving the safety and reliability of its power distribution performance. Finally, it performs a power adjustment demand assessment analysis on the power management data to adjust the load allocation scheme of the target ring main unit based on the information feedback, improving the rational allocation of power resources and the operating efficiency of the power grid.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of power distribution management, in particular to a sulfur hexafluoride insulated ring main unit and a power distribution system. BACKGROUND

[0002] The ring main unit is an important component in the power grid, and mainly functions to distribute power in the power system. The ring main unit can receive power from a superior power source and distribute the power to different load points through the internal switching device. This power distribution method can effectively organize and manage power resources and ensure the reliability and stability of power supply.

[0003] A highly sealed SF6 full-insulated ring main unit is disclosed in the announcement No. CN208971033U. When the cabinet body is connected with the cabinet door, the cabinet door connecting part is connected with a sealing ring one, and a sealing ring two is connected with the cabinet door. The bottom of the cabinet body is a sealing explosion-proof membrane, and the bottom of the cabinet body is connected with a release channel for releasing SF6. The sealing performance of the SF6 full-insulated ring main unit can be greatly improved, the leakage of SF6 gas in the cabinet can be prevented, and the service life of the SF6 ring main unit can be effectively improved.

[0004] However, the above-mentioned patent content has the defect that the power distribution working condition safety supervision feedback is not timely in the actual use process, greatly reduces the working stability and continuity of the target ring main unit, and cannot supervise the power distribution protection performance of the target ring main unit, which easily leads to the reduction of the power distribution performance safety of the target ring main unit, and it is difficult to reasonably adjust the load distribution scheme of the target ring main unit. Therefore, a solution is proposed. SUMMARY

[0005] The purpose of the present application is to provide a sulfur hexafluoride insulated ring main unit and a power distribution system to solve the above-mentioned technical defects.

[0006] The purpose of the present application can be realized by the following technical scheme: a power distribution system of a sulfur hexafluoride insulated ring main unit, comprising a ring main unit power distribution platform, a ring main unit information library, a ring main unit working condition unit, a power distribution interference unit, a ring distribution unit, a power regulation unit and a power distribution management unit.

[0007] The ring main unit power distribution platform retrieves the state parameters and power distribution information of the target ring main unit from the ring main unit information library, and sends the state parameters and power distribution information to the ring main unit working condition unit and the power distribution interference unit, respectively.

[0008] The ring main unit working condition unit is used for power distribution stability performance supervision evaluation analysis of the received state parameters, comparison analysis of the obtained power distribution error risk index T, and obtaining of normal signals or abnormal signals.

[0009] The power distribution interference unit is used for power distribution condition interference evaluation feedback analysis on the received power distribution information, and obtains a power distribution deviation coefficient PY;

[0010] The ring network distribution unit is used for responding to a normal signal, collecting working condition information of a target ring network cabinet, and performing ring network distribution working performance risk analysis on the working condition information, and performing discriminant processing on the obtained working performance index to obtain a stable signal or an operation and maintenance signal.

[0011] The power regulation unit is used for responding to a normal signal, collecting power management data of each load of a target ring network cabinet, performing power adjustment demand evaluation analysis on the power management data, and performing comparison analysis on the obtained regulation demand value to obtain a regulation signal.

[0012] Preferably, the power distribution stability performance supervision evaluation analysis process of the ring network cabinet working condition unit is as follows:

[0013] The running period of the sulfur hexafluoride insulated ring network cabinet is collected and set as a time threshold, the sulfur hexafluoride insulated ring network cabinet is set as a target ring network cabinet, the state parameters of the target ring network cabinet within the time threshold are obtained, and the state parameters include a characteristic floating index and a parameter deviation amount.

[0014] Based on the characteristic floating index and the parameter deviation amount of the target ring network cabinet within the current time threshold, the characteristic floating index and the parameter deviation amount are labeled as TP and CP respectively, the power distribution deviation coefficient PY of the target ring network cabinet within the current time threshold is recalled, the power distribution error risk index T is obtained according to the formula, the power distribution error risk index T is compared with the preset power distribution error risk index threshold stored therein, and a normal signal or an abnormal signal is generated.

[0015] Preferably, the power distribution condition interference evaluation feedback analysis process of the power distribution interference unit is as follows:

[0016] The power distribution information of the target ring network cabinet within the time threshold is obtained, the power distribution information includes the total number of transmission distribution and the number of transmission distribution deviation, the ratio between the number of transmission distribution deviation and the total number of transmission distribution is obtained, and the ratio is set as a transmission deviation rate.

[0017] The gas interference information of the target ring network cabinet within the time threshold is obtained, the gas interference information represents the floating amount of the sulfur hexafluoride gas pressure value and the water content of the sulfur hexafluoride gas, and the product of the floating amount of the sulfur hexafluoride gas pressure value and the water content of the sulfur hexafluoride gas after dimensionless processing is set as a gas defect value.

[0018] Preferably, the transmission deviation rate and gas defect value are compared and analyzed with the preset transmission deviation rate threshold and preset gas defect value threshold recorded and stored internally. The number of transmission deviation rates and gas defect values ​​that are greater than or equal to the preset transmission deviation rate threshold and preset gas defect value threshold is obtained, and these are set as distribution deviation risk values. The distribution deviation risk values ​​are then processed to obtain first-level deviation, second-level deviation, and third-level deviation, and the distribution deviation coefficient PY corresponding to the first-level deviation, second-level deviation, and third-level deviation is obtained.

[0019] Preferably, the ring network distribution performance risk analysis process of the ring network distribution unit is as follows:

[0020] The system acquires the operating status information of the target ring main unit within a time threshold, including protection response values ​​and allocation deviation values. It then compares and analyzes these values ​​with the preset protection response value thresholds and preset allocation deviation value thresholds stored internally. The system obtains the number of protection response values ​​and allocation deviation values ​​that are greater than or equal to the preset protection response value thresholds and preset allocation deviation value thresholds, and sets this number as the performance index. The system then performs discrimination processing on the performance index to generate a stability signal or an operation and maintenance signal.

[0021] Preferably, the power adjustment demand assessment and analysis process of the power control unit is as follows:

[0022] The system acquires the power management data of each load in the target ring network cabinet within the time threshold. The power management data includes the allocated power and the actual power demand. The system acquires the difference between the allocated power and the actual power demand and sets it as the power offset value. The system then performs a discrimination process on the power offset value. If the power offset value is greater than the preset power offset value threshold, the corresponding load is determined to be an allocation deviation load.

[0023] The ratio between the number of loads with distribution deviation within the time threshold and the total number of loads is obtained and set as the control demand value. The control demand value is then compared and analyzed to obtain the control signal.

[0024] Preferably, the characteristic fluctuation index represents the number of times the difference between the corresponding value of the operating characteristic parameter of the target ring main unit and the initial operating value is greater than a preset threshold. The operating characteristic parameters include operating temperature value and noise decibel value. The parameter deviation represents the number of times the actual deviation value of the operating power distribution parameter of the target ring main unit exceeds the allowable deviation value. The operating power distribution parameters include voltage and frequency. The actual deviation value represents the difference between the actual value of the operating power distribution parameter and the set value.

[0025] The present invention also proposes a sulfur hexafluoride insulated ring main unit, which is applied to the power distribution system of the sulfur hexafluoride insulated ring main unit. The ring main unit includes a ring main unit body, a support base fixedly connected to the lower surface of the ring main unit body, a protective door hinged to the front surface of the ring main unit body, a protective cover plate fixedly connected to the upper surface of the ring main unit body, and a lock hole plate fixedly connected to the front surface of the protective door.

[0026] The beneficial effects of this invention are as follows:

[0027] (1) This invention analyzes the power distribution stability performance from two aspects: the working characteristics and working parameters of the target ring main unit. At the same time, it analyzes the degree of sulfur hexafluoride gas interference of the target ring main unit to determine whether the risk of power distribution error of the target ring main unit is too high, so as to carry out targeted management of the target ring main unit in a timely manner and improve the working stability and continuity of the target ring main unit.

[0028] (2) The present invention also performs a risk analysis of the working condition information of the target ring network cabinet through information feedback, so as to make reasonable management adjustments to the target ring network cabinet based on the information feedback, thereby improving the safety and reliability of the power distribution performance of the target ring network cabinet. Furthermore, it performs power adjustment demand assessment and analysis on the power management data, so as to adjust the load distribution scheme of the target ring network cabinet based on the information feedback, thereby improving the rational allocation of power resources and the operating efficiency of the power grid. Attached Figure Description

[0029] The invention will now be further described with reference to the accompanying drawings;

[0030] Fig. 1 This is a three-dimensional view of the structure of the present invention;

[0031] Fig. 2 This is a top view of the structure of the present invention;

[0032] Fig. 3 This is a rear view of the structure of the present invention;

[0033] Fig. 4 This is a flowchart of the system of the present invention;

[0034] Legend: 1. Ring network cabinet; 2. Support base; 3. Protective door; 4. Protective cover plate; 5. Lock hole plate. Detailed Implementation

[0035] 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 only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1: Please refer to Figs. 1 to 4 As shown, the present invention is a sulfur hexafluoride insulated ring main unit, including a ring main unit 1, a support base 2 fixedly connected to the lower surface of the ring main unit 1, a protective door 3 hinged to the front surface of the ring main unit 1, a protective cover plate 4 fixedly connected to the upper surface of the ring main unit 1, and a lock hole plate 5 fixedly connected to the front surface of the protective door 3.

[0037] In this embodiment of the invention, the SF6 ring main unit is a medium-voltage electrical combination device with air insulation or gas insulation, which can be arbitrarily combined into multiple circuits with switching, interconnection and protection functions of the power system, and uses a load switch as the core component.

[0038] Example 2: A power distribution system for a sulfur hexafluoride insulated ring main unit, comprising a ring main unit power distribution platform, a ring main unit information database, a ring main unit operating condition unit, a power distribution interference unit, a ring network distribution unit, a power control unit, and a power distribution management unit;

[0039] The ring main unit information database is connected to the ring main unit power distribution platform in a one-way communication manner. The ring main unit power distribution platform is connected to the ring main unit operating condition unit and the power distribution interference unit in a one-way communication manner. The power distribution interference unit is connected to the ring main unit operating condition unit in a one-way communication manner. The ring main unit operating condition unit is connected to the ring main distribution unit, the power control unit and the power distribution management unit in a one-way communication manner. The ring main distribution unit and the power control unit are connected to the power distribution management unit in a one-way communication manner.

[0040] The ring main unit (RNB) power distribution platform retrieves the status parameters and power distribution information of the target RNB from the RNB information database, and sends these parameters and information to the RNB operating condition unit and the power distribution interference unit, respectively. The RNB operating condition unit performs power distribution stability performance monitoring and evaluation analysis on the received status parameters to determine whether the risk of power distribution errors in the target RNB is too high, and promptly implements targeted management of the target RNB to improve its operational stability and continuity. The specific power distribution stability performance monitoring and evaluation analysis process is as follows:

[0041] The running time of the sulfur hexafluoride insulated ring main unit is collected and set as a time threshold. The sulfur hexafluoride insulated ring main unit is set as the target ring main unit. The state parameters of the target ring main unit within the time threshold are obtained. The state parameters include the characteristic fluctuation index and the parameter deviation.

[0042] In this embodiment of the invention, the characteristic fluctuation index represents the number of times the difference between the corresponding value of the operating characteristic parameter of the target ring main unit and the initial operating value is greater than a preset threshold. The operating characteristic parameters include operating temperature value, noise decibel value, etc. It should be noted that the larger the value of the characteristic fluctuation index, the greater the risk of abnormal state of the target ring main unit, and the greater the risk to power distribution stability and reliability.

[0043] In this embodiment of the invention, the parameter deviation amount represents the number of actual deviation values ​​of the target ring main unit's operating power distribution parameters that exceed the allowable deviation value. The operating power distribution parameters include voltage, frequency, etc. The actual deviation value represents the difference between the actual value of the operating power distribution parameter and the set value. It should be noted that the larger the value of the parameter deviation amount, the greater the risk of abnormal power distribution stability and reliability of the target ring main unit. The parameter deviation amount is an influencing parameter that reflects the power distribution performance of the target ring main unit.

[0044] Based on the characteristic floating index and parameter deviation of the target ring main unit within the current time threshold, the characteristic floating index and parameter deviation are labeled as TP and CP respectively. At the same time, the distribution deviation coefficient PY of the target ring main unit within the current time threshold is retrieved, and the distribution error risk index is obtained according to the formula T=(TP×a1+CP×a2)×PY.

[0045] Where a1 and a2 are the preset weighting factor coefficients of the characteristic fluctuation index and parameter deviation, respectively, and both a1 and a2 are greater than zero. T is the power distribution error risk index. The power distribution error risk index T is compared and analyzed with the preset power distribution error risk index threshold recorded and stored internally.

[0046] If the ratio between the power distribution error risk index T and the preset power distribution error risk index threshold is less than 1, a normal signal is generated.

[0047] If the distribution error risk index T is greater than or equal to 1 with the preset distribution error risk index threshold, an abnormal signal is generated and the normal or abnormal signal is sent to the distribution management unit. After receiving the normal or abnormal signal, the distribution management unit immediately performs the preset early warning operation corresponding to the normal or abnormal signal so as to timely perform targeted management of the target ring network cabinet and improve the working stability and continuity of the target ring network cabinet.

[0048] The power distribution interference unit is used to perform power distribution condition interference assessment and feedback analysis on the received power distribution information. This analysis is conducted from the perspective of the sulfur hexafluoride gas quality of the target ring main unit to understand the degree of interference of sulfur hexafluoride gas on the power distribution condition of the target ring main unit, providing data support for subsequent analysis. The specific power distribution condition interference assessment and feedback analysis process is as follows:

[0049] The power distribution information of the target ring main unit within the time threshold is obtained. The power distribution information includes the total number of transmission and distribution and the number of transmission and distribution deviations. The ratio between the number of transmission and distribution deviations and the total number of transmission and distribution is obtained, and the ratio between the number of transmission and distribution deviations and the total number of transmission and distribution is set as the transmission deviation rate. It should be noted that the larger the value of the transmission deviation rate, the greater the risk of power distribution anomalies in the target ring main unit.

[0050] In this embodiment of the invention, the number of times the conveying allocation deviation occurs represents the number of times the difference between the actual conveying allocation and the set conveying allocation exceeds a preset threshold.

[0051] The gas interference information of the target ring main unit within the time threshold is obtained. The gas interference information represents the fluctuation of the sulfur hexafluoride gas pressure value and the sulfur hexafluoride gas moisture content. The product of the sulfur hexafluoride gas pressure value fluctuation and the sulfur hexafluoride gas moisture content after dimensionless processing is set as the gas defect value. It should be noted that the gas defect value is a parameter that reflects the impact of the power distribution and transmission of the target ring main unit.

[0052] In this embodiment of the invention, the fluctuation of the sulfur hexafluoride gas pressure value represents the portion of the current sulfur hexafluoride gas pressure value that is lower than the initial sulfur hexafluoride gas pressure value;

[0053] The transmission deviation rate and gas defect value are compared and analyzed with the preset transmission deviation rate threshold and preset gas defect value threshold stored internally. The number of transmission deviation rates and gas defect values ​​that are greater than or equal to the preset transmission deviation rate threshold and preset gas defect value threshold is obtained, and these are set as distribution deviation risk values. The distribution deviation risk values ​​are then processed for discrimination.

[0054] If the distribution deviation risk value is equal to zero, it is judged as a level one deviation;

[0055] If the distribution deviation risk value is equal to 1, it is judged as a level 2 deviation;

[0056] If the distribution deviation risk value is equal to 2, it is judged as a level three deviation;

[0057] The influence of the transmission distribution on the first-level deviation, second-level deviation, and third-level deviation increases sequentially, thereby obtaining the distribution deviation coefficient PY corresponding to the first-level deviation, second-level deviation, and third-level deviation. It should be noted that the first-level deviation, second-level deviation, and third-level deviation are all set with corresponding distribution deviation coefficient PY.

[0058] Example 3: After a normal signal is generated, the ring network distribution unit responds to the normal signal and collects the operating condition information of the target ring network cabinet. Simultaneously, it performs a ring network distribution performance risk analysis on the operating condition information to rationally manage and adjust the target ring network cabinet based on the feedback, thereby improving the safety and reliability of the target ring network cabinet's power distribution performance. The specific ring network distribution performance risk analysis process is as follows:

[0059] The operating status information of the target ring main unit within the time threshold is obtained. This information includes protection response values ​​and allocation deviation values. The protection response values ​​and allocation deviation values ​​are compared and analyzed with the preset protection response value thresholds and preset allocation deviation value thresholds stored internally. The number of protection response values ​​and allocation deviation values ​​that are greater than or equal to the preset protection response value thresholds and preset allocation deviation value thresholds is obtained and set as the performance index. The performance index is then processed for discrimination.

[0060] If the performance index is zero, a stable signal is generated;

[0061] If the performance index is 1 or the performance index is 2, an operation and maintenance signal is generated and the stability signal or operation and maintenance signal is sent to the power distribution management unit. After receiving the stability signal or operation and maintenance signal, the power distribution management unit immediately performs the preset early warning operation corresponding to the stability signal or operation and maintenance signal, so as to make reasonable management and adjustment of the target ring network cabinet according to the information feedback, so as to improve the safety and reliability of the power distribution performance of the target ring network cabinet.

[0062] In this embodiment of the invention, the protection response value represents the average duration between the occurrence of a protection operation and the completion of the protection operation in the target ring main unit. The protection operation includes overload protection, short circuit protection, etc. It should be noted that the larger the value of the protection response value, the greater the risk of abnormal power distribution protection performance of the target ring main unit.

[0063] In this embodiment of the invention, the allocation deviation value represents the frequency at which the power supply voltage of the vacuum circuit breaker in the target ring main unit is lower than the preset power supply voltage. It should be noted that the larger the value of the allocation deviation value, the greater the risk of uneven distribution in the ring main unit.

[0064] Once a normal signal is generated, the power control unit responds to it and collects power management data from each load of the target ring main unit. It then performs a power adjustment demand assessment and analysis on the power management data to adjust the load allocation scheme of the target ring main unit based on feedback information. This aims to improve the rational allocation of power resources and the operational efficiency of the power grid. The specific power adjustment demand assessment and analysis process is as follows:

[0065] The power management data of each load in the target ring network cabinet within the time threshold is obtained. The power management data includes the allocated power and the actual power demand.

[0066] The difference between the allocated power and the actual power demand is obtained and set as the power offset value. The power offset value is then processed for discrimination. If the power offset value is greater than the preset power offset value threshold, the corresponding load is determined to be a load with allocation deviation. It should be noted that the more loads with allocation deviation in the target ring network cabinet, the greater the risk of the current allocation rationality.

[0067] Obtain the ratio between the number of loads with distribution deviations within the time threshold and the total number of loads, set this ratio as the control demand value, and perform comparative analysis on the control demand value:

[0068] If the control demand value is less than the preset control demand value threshold, no signal will be generated;

[0069] If the control demand value is greater than or equal to the preset control demand value threshold, a control signal is generated and sent to the distribution management unit. After receiving the control signal, the distribution management unit immediately performs the preset early warning operation corresponding to the control signal, so as to adjust the load distribution scheme of the target ring network cabinet according to the information feedback, so as to improve the rational allocation of power resources and the operating efficiency of the power grid.

[0070] In summary, the power distribution stability performance of the target ring main unit is analyzed from two aspects: its working characteristics and working parameters. At the same time, the degree of sulfur hexafluoride gas interference of the target ring main unit is also analyzed to determine whether the risk of power distribution error of the target ring main unit is too high, so as to carry out targeted management of the target ring main unit in a timely manner and improve the working stability and continuity of the target ring main unit.

[0071] By using information feedback to analyze the operating conditions of the target ring main unit, a risk analysis of the ring main unit's performance is conducted. This allows for rational management adjustments to the target ring main unit based on the feedback, improving the safety and reliability of its power distribution performance. Furthermore, by analyzing power management data to assess power adjustment needs, the load allocation scheme of the target ring main unit is adjusted based on the feedback, thereby improving the rational allocation of power resources and the efficiency of the power grid operation.

[0072] The threshold value is set to facilitate comparison. The threshold value depends on the amount of sample data and the number of base values ​​set by those skilled in the art for each sample group, as long as it does not affect the proportional relationship between the parameter and the quantized value. The above formulas are all derived from software simulation using a large amount of data and are selected to be close to the true value. The coefficients in the formulas are set by those skilled in the art based on the actual situation.

[0073] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A power distribution system of a SF6 insulated ring main unit, characterized in that, The ring main unit distribution platform, the ring main unit information base, the ring main unit working condition unit, the power distribution interference unit, the ring network distribution unit, the power regulation unit and the power distribution management unit are included. The ring main unit distribution platform obtains state parameters and power distribution information of a target ring main unit from the ring main unit information base, and sends the state parameters and the power distribution information to the ring main unit working condition unit and the power distribution interference unit respectively. The ring main unit working condition unit is used for performing power distribution stability performance supervision evaluation analysis on the received state parameters, performing comparison analysis on a power distribution error risk index T obtained, and obtaining a normal signal or an abnormal signal. The power distribution interference unit is used for performing power distribution working condition interference evaluation feedback analysis on the received power distribution information, and obtaining a power distribution deviation coefficient PY. The ring network distribution unit is used for responding to the normal signal, collecting working condition information of the target ring main unit, performing ring network distribution working performance risk analysis on the working condition information, performing discriminant processing on an obtained working performance index, and obtaining a stable signal or an operation and maintenance signal. The power regulation unit is used for responding to the normal signal, collecting power management data of each load of the target ring main unit, performing power adjustment demand evaluation analysis on the power management data, performing comparison analysis on an obtained regulation demand value, and obtaining a regulation signal. The power distribution stability performance supervision evaluation analysis process of the ring main unit working condition unit is as follows: The running time period of the sulfur hexafluoride insulated ring main unit is collected, and is set as a time threshold value. The sulfur hexafluoride insulated ring main unit is set as a target ring main unit. State parameters of the target ring main unit within the time threshold value are obtained. The state parameters include a characteristic floating index and a parameter deviation amount. Based on the characteristic floating index and the parameter deviation amount of the target ring net cabinet within the current time threshold, the characteristic floating index and the parameter deviation amount are labeled as TP and CP respectively, and the power distribution deviation coefficient PY of the target ring net cabinet within the current time threshold is called, and the power distribution error risk index T is obtained according to the formula a1 and a2 are preset weight factor coefficients of the characteristic floating index and the parameter deviation amount respectively, a1 and a2 are greater than zero, the power distribution error risk index T is compared and analyzed with the preset power distribution error risk index threshold recorded and stored therein, and a normal signal or an abnormal signal is generated.

2. A power distribution system of a SF6 insulated ring main unit according to claim 1, characterized in that, The power distribution working condition interference evaluation feedback analysis process of the power distribution interference unit is as follows: Power distribution information of the target ring main unit within the time threshold value is obtained. The power distribution information includes a total number of delivery distribution and a number of delivery distribution deviations. A ratio between the number of delivery distribution deviations and the total number of delivery distribution is obtained, and is set as a delivery deviation rate. Gas interference information of the target ring main unit within the time threshold value is obtained. The gas interference information represents a sulfur hexafluoride gas pressure value floating amount and a sulfur hexafluoride gas water content. A product value obtained by multiplying the sulfur hexafluoride gas pressure value floating amount and the sulfur hexafluoride gas water content after dimensionless processing is set as a gas defect value.

3. A power distribution system of a SF6 insulated ring main unit according to claim 2, characterized in that, The delivery deviation rate and the gas defect value are compared with preset delivery deviation rate threshold values and preset gas defect value threshold values recorded and stored in the power distribution interference unit. The number of the delivery deviation rate and the gas defect value greater than or equal to the preset delivery deviation rate threshold values and the preset gas defect value threshold values is obtained, and is set as a power distribution deviation risk value. The power distribution deviation risk value is discriminant processed, and a first deviation, a second deviation and a third deviation are obtained. The power distribution deviation coefficients PY corresponding to the first deviation, the second deviation and the third deviation are obtained.

4. The power distribution system of claim 3, wherein, The ring network distribution working performance risk analysis process of the ring network distribution unit is as follows: The working condition information of the target ring net cabinet within the time threshold is acquired, the working condition information includes a protection response value and a distribution deviation value, the protection response value and the distribution deviation value are compared and analyzed with the preset protection response value threshold and the preset distribution deviation value threshold stored in the internal record, the number of the protection response value and the distribution deviation value greater than or equal to the preset protection response value threshold and the preset distribution deviation value threshold is acquired, and is set as a working performance index, and the working performance index is discriminated to generate a stable signal or an operation and maintenance signal.

5. A power distribution system of a SF6 insulated ring main unit according to claim 4, characterized in that The power adjustment requirement evaluation and analysis process of the power regulation unit is as follows: The power management data of each load of the target ring net cabinet within the time threshold is acquired, the power management data includes distributed power and actual demand power; the difference between the distributed power and the actual demand power is acquired, and is set as a power deviation value, and the power deviation value is discriminated, if the power deviation value is greater than the preset power deviation value threshold, the corresponding load is determined as a distribution deviation load; The ratio between the number of the distribution deviation load within the time threshold and the total number of the loads is acquired, and is set as a regulation requirement value, and the regulation requirement value is compared and analyzed to obtain a regulation signal.

6. A power distribution system of a SF6 insulated ring main unit according to claim 5, characterized in that The characteristic floating index represents the number of the difference between the corresponding value of the operation characteristic parameter of the target ring net cabinet and the initial operation value greater than the preset threshold, the operation characteristic parameter includes an operation temperature value and a noise decibel value; the parameter deviation amount represents the number of the actual deviation value of the operation power distribution parameter of the target ring net cabinet exceeding the allowed deviation value, the operation power distribution parameter includes voltage and frequency, and the actual deviation value represents the difference between the actual value of the operation power distribution parameter and the set value.

7. A SF6 insulated ring main unit for use in a power distribution system of the SF6 insulated ring main unit according to claim 6, comprising a ring main unit body (1), characterized in that The lower surface of the ring net cabinet body (1) is fixedly connected with a support base (2), the front surface of the ring net cabinet body (1) is hingedly connected with a protection door (3), the upper surface of the ring net cabinet body (1) is fixedly connected with a protection cover plate (4), and the front surface of the protection door (3) is fixedly connected with a lock hole plate (5).

Images