Sulfur hexafluoride insulation ring main unit and power distribution system

Abstract

The sulfur hexafluoride insulation ring main unit comprises a ring main unit power distribution platform, a ring main unit information base, a ring main unit working condition unit, a power distribution interference unit, a ring network distribution unit, a power regulation and control unit and a power distribution management unit. According to the method, power distribution stability performance analysis is carried out from two points of working characteristics and working parameters of the target ring main unit, and analysis is carried out in combination with the sulfur hexafluoride gas interference degree of the target ring main unit, so that the working stability and continuity of the target ring main unit are improved; ring network distribution working performance risk analysis is carried out on the working condition information of the target ring main unit in an information feedback mode, so that the safety and reliability of the power distribution performance of the target ring main unit are improved, and electric power adjustment demand evaluation analysis is carried out on the electric energy management data. Therefore, the load distribution scheme of the target ring main unit is adjusted according to the information feedback condition, and the reasonable distribution of power resources and the operation efficiency of a power grid are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of distribution management, and particularly relates to a sulfur hexafluoride insulated ring main unit and a distribution system. Background Art

[0002] The ring main unit is an important part of the power grid, and its main function is to distribute power in the power system. The ring main unit can receive electric energy from the superior power source and distribute the electric energy to different load points through the switchgear inside it. This power distribution method can effectively organize and manage power resources, ensuring the reliability and stability of power supply;

[0003] A highly sealed SF6 fully insulated ring main unit is disclosed in the publication number CN208971033U. When the cabinet body is connected to the cabinet door, the cabinet door connection part connects the first sealing ring, the cabinet door connects the second sealing ring, the bottom of the cabinet body is a sealed explosion-proof film, and the bottom of the cabinet body is connected to a release channel for releasing SF6, which can greatly improve the sealing performance of the SF6 fully insulated ring main unit, prevent the leakage of SF6 gas in the cabinet, and effectively improve the service life of the SF6 ring main unit;

[0004] However, in the actual use process of the above patent content, there are defects in the untimely feedback of the safety supervision of the power distribution working conditions, which greatly reduces the working stability and continuity of the target ring main unit, and it is also impossible to supervise the power distribution protection performance of the target ring main unit, easily leading to a reduction in the safety of the power distribution performance 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 now. Summary of the Invention

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

[0006] The purpose of the present invention can be achieved by the following technical solutions: A power distribution system of a sulfur hexafluoride insulated ring main unit includes a ring main unit power distribution platform, a ring main unit information database, a ring main unit working condition unit, a power distribution interference unit, a ring network distribution unit, a power regulation unit, and a power distribution management unit;

[0007] The ring main unit power distribution platform retrieves the status parameters and power distribution information of the target ring main unit from the ring main unit information database, and sends the status 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 to conduct supervision, evaluation, and analysis of the power distribution stability performance of the received status parameters, compare and analyze the obtained power distribution error risk index T, and obtain a normal signal or an abnormal signal;

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

[0010] The ring network distribution unit is used to respond to normal signals, collect the condition information of the target ring main unit, and at the same time conduct ring network distribution working performance risk analysis on the condition information, and conduct discrimination processing on the obtained working performance index to obtain stable signals or operation and maintenance signals;

[0011] The power regulation unit is used to respond to normal signals, collect the power management data of each load of the target ring main unit, conduct power adjustment demand evaluation and analysis on the power management data, and conduct comparison and analysis on the obtained regulation demand value to obtain regulation signals.

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

[0013] Collect the operation period of the sulfur hexafluoride insulated ring main unit, and set it as the time threshold. Set the sulfur hexafluoride insulated ring main unit as the target ring main unit, and obtain the state parameters of the target ring main unit within the time threshold. The state parameters include the characteristic floating index and the parameter deviation amount;

[0014] Based on the characteristic floating index and the parameter deviation amount of the target ring main unit within the current time threshold, label the characteristic floating index and the parameter deviation amount as TP and CP respectively. At the same time, retrieve the power distribution deviation coefficient PY of the target ring main unit within the current time threshold, and obtain the power distribution error risk index T according to the formula. Compare and analyze the power distribution error risk index T with the preset power distribution error risk index threshold stored in it, and generate normal signals or abnormal signals.

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

[0016] Obtain the power distribution information of the target ring main unit within the time threshold. The power distribution information includes the total number of transmission and distribution times and the number of transmission and distribution deviation times. Obtain the ratio between the number of transmission and distribution deviation times and the total number of transmission and distribution times, and set it as the transmission deviation rate;

[0017] Obtain the gas interference information of the target ring main unit within the time threshold. The gas interference information represents the floating amount of the sulfur hexafluoride gas pressure value and the water content of the sulfur hexafluoride gas. Set the product value obtained by multiplying the floating amount of the sulfur hexafluoride gas pressure value and the water content of the sulfur hexafluoride gas after dimensionless processing as the gas defect value.

[0018] Preferably, the conveying deviation rate and the gas defect value are compared and analyzed with the preset conveying deviation rate threshold and the preset gas defect value threshold stored in it, the number of the conveying deviation rate and the gas defect value that are greater than or equal to the preset conveying deviation rate threshold and the preset gas defect value threshold is obtained, and it is set as the power distribution deviation risk value, and the power distribution deviation risk value is judged and processed to obtain the first-level deviation, the second-level deviation and the third-level deviation, and then the power distribution deviation coefficients PY corresponding to the first-level deviation, the second-level deviation and the third-level deviation are obtained.

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

[0020] The working condition information of the target ring main cabinet within the time threshold is obtained. The working condition information includes the protection response value and the 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 it. The number of the protection response value and the distribution deviation value that are greater than or equal to the preset protection response value threshold and the preset distribution deviation value threshold is obtained, and it is set as the working performance index, and the working performance index is judged and processed to generate a stable signal or a maintenance signal.

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

[0022] The electric energy management data of each load of the target ring main cabinet within the time threshold is obtained. The electric energy management data includes the distributed electric energy and the actual required electric energy; the difference between the distributed electric energy and the actual required electric energy is obtained, and it is set as the electric energy offset value, and the electric energy offset value is judged and processed. If the electric energy offset value is greater than the preset electric energy offset value threshold, it is determined that the corresponding load is a distribution deviation load;

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

[0024] Preferably, the characteristic floating index represents the number of the corresponding values of the operation characteristic parameters of the target ring main cabinet that are greater than the preset threshold compared with the initial operation values. The operation characteristic parameters include the operation temperature value and the noise decibel value; the parameter deviation amount represents the number of the actual deviation values of the operation power distribution parameters of the target ring main cabinet that exceed the allowable deviation values. The operation power distribution parameters include voltage and frequency, and the actual deviation value represents the difference between the actual value and the set value of the operation power distribution parameter.

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

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

[0027] (1) The present invention analyzes the power distribution stability performance from two aspects of the working characteristics and working parameters of the target ring main unit, and at the same time combines the degree of sulfur hexafluoride gas interference of the target ring main unit for analysis to determine whether the risk of power distribution error of the target ring main unit is too high, so as to timely conduct targeted management on the target ring main unit to improve the working stability and continuity of the target ring main unit;

[0028] (2) The present invention also analyzes the risk of the working performance of the ring network distribution of the working condition information of the target ring main unit through the way of information feedback, so as to make reasonable management adjustments to the target ring main unit according to the information feedback situation to improve the safety and reliability of the power distribution performance of the target ring main unit. And it analyzes the power adjustment demand assessment of the power management data, so as to adjust the load distribution scheme of the target ring main unit according to the information feedback situation to improve the reasonable distribution of power resources and the operation efficiency of the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The following further describes the present invention with reference to the accompanying drawings;

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

[0031] Figure 2 is a top view of the structure of the present invention;

[0032] Figure 3 is a rear view of the structure of the present invention;

[0033] Figure 4 is a system flow block diagram of the present invention;

[0034] Legend: 1. Ring main unit body; 2. Support base; 3. Protective door; 4. Protective cover plate; 5. Lock hole plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

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

[0037] In the embodiment of the present invention, the SF6 ring main unit is a medium-voltage electrical combination device with air insulation or gas insulation that can be arbitrarily combined into multi-loop inlets and outlets with functions of switching, connection, and protection of the power system, with a load switch as the core component.

[0038] Example 2: A power distribution system of a sulfur hexafluoride insulated ring main unit, including a ring main unit power distribution platform, a ring main unit information database, a ring main unit working condition unit, a power distribution interference unit, a ring network distribution unit, a power regulation unit, and a power distribution management unit;

[0039] The ring main unit information database is in one-way communication connection with the ring main unit power distribution platform, the ring main unit power distribution platform is in one-way communication connection with both the ring main unit working condition unit and the power distribution interference unit, the power distribution interference unit is in one-way communication connection with the ring main unit working condition unit, the ring main unit working condition unit is in one-way communication connection with the ring network distribution unit, the power regulation unit, and the power distribution management unit, and both the ring network distribution unit and the power regulation unit are in one-way communication connection with the power distribution management unit;

[0040] The ring main unit power distribution platform retrieves the status parameters and power distribution information of the target ring main unit from the ring main unit information database, and sends the status parameters and 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 to conduct supervision, evaluation, and analysis of the power distribution stability performance of the received status parameters to determine whether the risk of power distribution error of the target ring main unit is too high, and timely conduct targeted management of the target ring main unit to improve the working stability and continuity of the target ring main unit. The specific process of supervision, evaluation, and analysis of the power distribution stability performance is as follows:

[0041] Collect the operation period of the sulfur hexafluoride insulated ring main unit, and set it as the time threshold. Set the sulfur hexafluoride insulated ring main unit as the target ring main unit, and obtain the status parameters of the target ring main unit within the time threshold. The status parameters include the characteristic floating index and the parameter deviation amount;

[0042] In the embodiment of the present invention, the characteristic floating index represents the number of differences between the corresponding values of the operation characteristic parameters of the target ring main unit and the initial operation values that are greater than the preset threshold. The operation characteristic parameters include the operation temperature value, the noise decibel value, etc. It should be noted that the larger the value of the characteristic floating index, the greater the risk of abnormal status of the target ring main unit, and the greater the risk of power distribution stability and reliability;

[0043] In an embodiment of the present invention, the parameter deviation amount represents the number corresponding to the actual deviation value of the operating power distribution parameters of the target ring main unit exceeding the allowable deviation value. The operating power distribution parameters include voltage, frequency, etc. The actual deviation value represents the difference between the actual value and the set value of the operating power distribution parameters. It should be noted that the larger the value of the parameter deviation amount, the greater the risk of abnormality in the power distribution stability and reliability of the target ring main unit. The parameter deviation amount is an influencing parameter reflecting the power distribution performance of the target ring main unit;

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

[0045] Wherein, a1 and a2 are respectively the preset weight factor coefficients of the characteristic floating index and the parameter deviation amount, both a1 and a2 are greater than zero, T is the power distribution error risk index, and compare and analyze the power distribution error risk index T with the preset power distribution error risk index threshold 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 ratio between the power distribution error risk index T and the preset power distribution error risk index threshold is greater than or equal to 1, an abnormal signal is generated. Send the normal signal or the abnormal signal to the power distribution management unit. After receiving the normal signal or the abnormal signal, the power distribution management unit immediately performs the preset warning operation corresponding to the normal signal or the abnormal signal, so as to timely conduct targeted management on the target ring main unit to improve the working stability and continuity of the target ring main unit;

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

[0049] Obtain the power distribution information of the target ring main unit within the time threshold. The power distribution information includes the total number of transmission and distribution times and the number of transmission and distribution deviation times. Obtain the ratio between the number of transmission and distribution deviation times and the total number of transmission and distribution times, and set the ratio between the number of transmission and distribution deviation times and the total number of transmission and distribution times 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 abnormality of the target ring main unit;

[0050] In the embodiments of the present invention, the number of conveying and distribution deviations represents the number of times when the difference between the actual conveying and distribution quantity and the set conveying and distribution quantity is greater than a preset threshold;

[0051] Gas interference information of the target ring main unit within a time threshold is obtained. The gas interference information represents the floating amount of sulfur hexafluoride gas pressure value and the water content of sulfur hexafluoride gas. The product value obtained by multiplying the numerical values of the floating amount of sulfur hexafluoride gas pressure value and the water content of sulfur hexafluoride gas after dimensionless treatment is set as the gas defect value. It should be noted that the gas defect value is an influence parameter reflecting the power distribution conveying and distribution of the target ring main unit;

[0052] In the embodiments of the present invention, the floating amount of sulfur hexafluoride gas pressure value represents the part where the current sulfur hexafluoride gas pressure value is lower than the initial sulfur hexafluoride gas pressure value;

[0053] The conveying deviation rate and the gas defect value are compared and analyzed with the preset conveying deviation rate threshold and the preset gas defect value threshold stored in it. The number corresponding to the conveying deviation rate and the gas defect value that is greater than or equal to the preset conveying deviation rate threshold and the preset gas defect value threshold is obtained and set as the power distribution deviation risk value, and the power distribution deviation risk value is discriminatively processed:

[0054] If the power distribution deviation risk value is equal to zero, it is determined as a first-level deviation;

[0055] If the power distribution deviation risk value is equal to 1, it is determined as a second-level deviation;

[0056] If the power distribution deviation risk value is equal to 2, it is determined as a third-level deviation;

[0057] Among them, the influence degrees of the first-level deviation, the second-level deviation, and the third-level deviation on the conveying and distribution increase in sequence. Then, the power distribution deviation coefficients PY corresponding to the first-level deviation, the second-level deviation, and the third-level deviation are obtained. It should be noted that corresponding power distribution deviation coefficients PY are set for the first-level deviation, the second-level deviation, and the third-level deviation.

[0058] Embodiment 3: After a normal signal is generated, the ring main distribution unit is used to respond to the normal signal, collect the operating condition information of the target ring main unit, and simultaneously perform a risk analysis on the operating performance of the ring main distribution for the operating condition information, so as to perform reasonable management and adjustment on the target ring main unit according to the information feedback situation, so as to improve the safety and reliability of the power distribution performance of the target ring main unit. The specific risk analysis process of the ring main distribution operating performance is as follows:

[0059] Obtain the operating conditions information of the target ring main unit within the time threshold. The operating conditions information includes the protection response value and the distribution deviation value. Compare and analyze the protection response value and the distribution deviation value with the preset protection response value threshold and the preset distribution deviation value threshold stored internally, obtain the number of the protection response value and the distribution deviation value that are greater than or equal to the preset protection response value threshold and the preset distribution deviation value threshold, and set it as the working performance index, and perform discrimination processing on the working performance index:

[0060] If the working performance index = 0, generate a stable signal;

[0061] If the working performance index = 1 or the working performance index = 2, generate an operation and maintenance signal, and send the stable signal or the operation and maintenance signal to the power distribution management unit. After receiving the stable signal or the operation and maintenance signal, the power distribution management unit immediately performs the preset warning operation corresponding to the stable signal or the operation and maintenance signal, so as to perform reasonable management adjustment on the target ring main unit according to the information feedback situation, so as to improve the safety and reliability of the power distribution performance of the target ring main unit;

[0062] In the embodiment of the present invention, the protection response value represents the average value of the time duration from the moment when a protection operation appears in the target ring main unit to the moment when the protection operation is completed. 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 the embodiment of the present invention, the distribution deviation value represents the frequency at which the supply voltage of the vacuum circuit breaker in the target ring main unit is lower than the preset supply voltage. It should be noted that the larger the value of the distribution deviation value, the greater the risk of uneven distribution of the ring main unit;

[0064] When a normal signal is generated, the power control unit is used to respond to the normal signal, collect the power management data of each load of the target ring main unit, and perform power adjustment demand assessment and analysis on the power management data, so as to adjust the load distribution scheme of the target ring main unit according to the information feedback situation, so as to improve the reasonable distribution of power resources and the operation efficiency of the power grid. The specific power adjustment demand assessment and analysis process is as follows:

[0065] Obtain the power management data of each load of the target ring main unit within the time threshold. The power management data includes the allocated power and the actual required power;

[0066] Obtain the difference between the allocated power and the actual required power, and set it as the power offset value, and perform discrimination processing on the power offset value. If the power offset value is greater than the preset power offset value threshold, it is determined that the corresponding load is a distribution deviation load. It should be noted that the more the number of distribution deviation loads in the target ring main unit, the greater the current distribution rationality risk;

[0067] Obtain the ratio between the number of allocated deviation loads within the time threshold and the total number of loads, and set it as the regulation demand value, and conduct a comparison and analysis of the regulation demand value:

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

[0069] If the regulation demand value is greater than or equal to the preset regulation demand value threshold, a regulation signal is generated and sent to the power distribution management unit. After receiving the regulation signal, the power distribution management unit immediately performs the preset warning operation corresponding to the regulation signal, so as to adjust the load distribution plan of the target ring main unit according to the information feedback situation, in order to improve the reasonable distribution of power resources and the operation efficiency of the power grid;

[0070] In summary, the power distribution stability performance is analyzed from two aspects: the working characteristics and working parameters of the target ring main unit, and at the same time, the interference degree of sulfur hexafluoride gas in the target ring main unit is combined for analysis, so as to determine whether the risk of power distribution error of the target ring main unit is too high, and timely conduct targeted management on the target ring main unit to improve the working stability and continuity of the target ring main unit;

[0071] And through the way of information feedback, the risk analysis of the working performance of the ring network distribution of the working condition information of the target ring main unit is carried out, so as to make a reasonable management adjustment on the target ring main unit according to the information feedback situation, improve the safety and reliability of the power distribution performance of the target ring main unit, and conduct an assessment and analysis of the power adjustment demand for the power management data, and adjust the load distribution plan of the target ring main unit according to the information feedback situation, so as to improve the reasonable distribution of power resources and the operation efficiency of the power grid.

[0072] The setting of the threshold value is for the convenience of comparison. Regarding the size of the threshold value, it depends on the amount of sample data and the number of base numbers set by those skilled in the art for each group of sample data, as long as it does not affect the proportional relationship between the parameters and the quantified values. The above formulas are all obtained by collecting a large amount of data for software simulation and selecting a formula close to the true value. The coefficients in the formulas are set by those skilled in the art according to the actual situation.

[0073] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes an equivalent substitution or change, and should be covered by the protection scope of the present invention.

Claims

1. A power distribution system of a sulfur hexafluoride insulated ring main unit, characterized in that: It includes the ring main unit power distribution platform, the ring main unit information library, the ring main unit working condition unit, the power distribution interference unit, the ring network distribution unit, the power control unit and the power distribution management unit; 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; The ring main unit working condition unit is used to monitor and evaluate the received status parameters for the power distribution stability performance, compare and analyze the obtained power distribution error risk index T, and obtain a normal signal or an abnormal signal; The power distribution interference unit is used to perform power distribution condition interference evaluation feedback analysis on the received power distribution information to obtain the power distribution deviation coefficient PY; The ring network distribution unit is used to respond to normal signals and collect the working condition information of the target ring network cabinet. At the same time, it performs risk analysis on the working condition information of the ring network distribution work, and performs discrimination processing on the obtained working performance index to obtain a stable signal or an operation and maintenance signal; The power control unit is used to respond to normal signals and collect the power management data of each load of the target ring network cabinet, conduct power adjustment demand evaluation and analysis on the power management data, compare and analyze the obtained control demand values, and obtain control signals.

2. A power distribution system of a sulfur hexafluoride insulated ring main unit according to claim 1, characterized in that: The distribution stability performance supervision, evaluation and analysis process of the ring main unit working condition unit is as follows: The operating time period 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 a target ring main unit, and the state parameters of the target ring main unit within the time threshold are obtained, the state parameters including a characteristic floating index and a parameter deviation; 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 TP and CP respectively, and the distribution deviation coefficient PY of the target ring main unit within the current time threshold is retrieved, and the distribution error risk index T is obtained according to the formula. The distribution error risk index T is compared and analyzed with the preset distribution error risk index threshold entered and stored internally to generate a normal signal or an abnormal signal.

3. A power distribution system of a sulfur hexafluoride insulated ring main unit according to claim 2, characterized in that: The distribution interference unit's distribution condition interference assessment feedback analysis process is as follows: 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 distribution and the number of transmission distribution deviations, the ratio between the number of transmission distribution deviations and the total number of transmission distribution is obtained, and the ratio is set as the transmission deviation rate; 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 water content of the sulfur hexafluoride gas. The product value obtained by multiplying the dimensionless values ​​of the sulfur hexafluoride gas pressure value fluctuation and the sulfur hexafluoride gas water content is set as the gas defect value.

4. A power distribution system of a sulfur hexafluoride insulated ring main unit according to claim 3, characterized in that: 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 entered and stored internally, and 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 set as the distribution deviation risk value, and the distribution deviation risk value is discriminated and processed to obtain the first-level deviation, the second-level deviation and the third-level deviation, and then the distribution deviation coefficient PY corresponding to the first-level deviation, the second-level deviation and the third-level deviation is obtained.

5. A power distribution system of a sulfur hexafluoride insulated ring main unit according to claim 4, characterized in that: The ring network allocation work performance risk analysis process of the ring network allocation unit is as follows: The operating condition information of the target ring main unit within the time threshold is obtained, and the operating condition information includes a protection response value and an allocation deviation value. The protection response value and the allocation deviation value are compared and analyzed with the preset protection response value threshold and the preset allocation deviation value threshold entered and stored internally, and the number of protection response values ​​and allocation deviation values ​​that are greater than or equal to the preset protection response value threshold and the preset allocation deviation value threshold is obtained, and it is set as the working performance index, and the working performance index is discriminated and processed to generate a stable signal or generate an operation and maintenance signal.

6. A power distribution system of a sulfur hexafluoride insulated ring main unit according to claim 5, characterized in that: The power adjustment demand evaluation and analysis process of the power control unit is as follows: Obtain the power management data of each load of the target ring main unit within the time threshold, the power management data including the allocated power and the actual required power; obtain the difference between the allocated power and the actual required power, and set it as the power offset value, and perform discrimination processing 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 a distribution deviation load; The ratio between the number of deviation loads distributed within the time threshold and the total number of loads is obtained and set as the regulation demand value. The regulation demand value is compared and analyzed to obtain a regulation signal.

7. A power distribution system of a sulfur hexafluoride insulated ring main unit according to claim 6, characterized in that: The characteristic floating index indicates the number of times the difference between the corresponding value of the operating characteristic parameter of the target ring network cabinet and the initial operating value is greater than a preset threshold, and the operating characteristic parameters include the operating temperature value and the noise decibel value; the parameter deviation indicates the number of times the actual deviation value of the operating power distribution parameter of the target ring network cabinet exceeds the corresponding allowable deviation value, and the operating power distribution parameters include voltage and frequency, and the actual deviation value indicates the difference between the actual value of the operating power distribution parameter and the set value.

8. A sulfur hexafluoride insulated ring main unit, applied to a power distribution system of a sulfur hexafluoride insulated ring main unit as claimed in claim 7, comprising a ring main unit body (1), characterized in that: The lower surface of the ring network cabinet (1) is fixedly connected to a support base (2), the front surface of the ring network cabinet (1) is hinged with a protective door (3), the upper surface of the ring network cabinet (1) is fixedly connected to a protective cover plate (4), and the front surface of the protective door (3) is fixedly connected to a keyhole plate (5).

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