Ring main unit monitoring system

Abstract

The invention, which belongs to the technical field of power distribution, discloses a ring main unit monitoring system comprising a background control center and a storage module. A first control mode, a second control mode and a third control mode are stored in the storage module; the background control center is in communication connection with all the ring main units on site; the first control mode is that all on-site ring main units operate in a preset parameter range; the second control mode is set after the ring main unit operates for T periods in the first control mode, and the third control mode is set on the basis of the second control mode and the first control mode; according to the invention, the initial parameters of the ring main unit are set, so that the ring main unit operates according to the initial parameters, after the ring main unit operates for a set period, secondary parameter setting can be carried out according to the ring main unit which operates normally, parameter correction can be carried out for the ring main unit which operates abnormally, and the ring main unit is monitored through three control modes. When abnormity occurs, adjustment can be carried out in time so that normal operation can be realized.

Description

Technical Field

[0001] The invention relates to the technical field of power distribution, and in particular to a ring network cabinet monitoring system. Background Art

[0002] As an important power distribution equipment in the power system, the ring main unit undertakes the important tasks of power distribution, protection and control. However, in actual operation, the ring main unit may fail for various reasons, resulting in failure to operate normally. If the failure cannot be discovered and handled in time, it will bring hidden dangers to the reliable operation of the power grid.

[0003] At present, various sensors and monitoring components are mainly installed in the ring network cabinet to detect the working status of each component in each ring network cabinet, and send the detection data to the background control center in real time. When there is abnormal data, it will check which component has failed accordingly, and then the technicians will go to the site to confirm and repair it.

[0004] The above fault monitoring method is time-consuming and cannot be confirmed and repaired on site in the first time, which causes more serious damage to the components with abnormal data. Therefore, it is particularly important to develop a monitoring system that can monitor the operating status of the ring main unit in real time and detect and handle faults in time. Summary of the invention

[0005] In order to solve the problems of the prior art, the present invention provides a ring main unit monitoring system, comprising: a background control center and a storage module; The storage module stores a plurality of control modes for monitoring the ring main unit during operation, wherein the control modes include a first control mode, a second control mode and a third control mode; The background control center is connected to all ring main units on site for communication; The first control mode is that all ring main units on site operate within a preset parameter range, and the preset parameters are normal operating parameters obtained from historical data of the ring main units; The second control mode is that after the ring main unit runs for T cycles in the first control mode, the operating parameters of all ring main units within the T cycle are obtained through the data acquisition unit, and the obtained operating parameters are sent to the first controller. The first controller compares the received operating parameters of the ring main unit with the rated parameters of the ring main unit. If the operating parameters of all ring main units at any time within the T cycle are within the rated parameter range, it indicates that the operating parameters of the ring main unit do not exceed the rated parameters. An operating parameter closest to the preset parameters in the first mode is selected from the operating parameters of all ring main units within the T cycle, and the ring main unit corresponding to the operating parameter is used as the host, and other ring main units are used as slaves. The operating parameters of the host at any time within the T cycle are used as control parameters, so that other ring main units are set according to the control parameters; The third control mode is that after the ring main unit runs for T cycles in the first control mode, the operating parameters of all the ring main unit at a certain moment are obtained. If the operating parameters of a ring main unit exceed the rated parameter range, the parameters of the host in the second control mode are used to correct the parameters of the ring main unit with abnormal operation, or the preset parameters in the first mode are used to correct the parameters of the ring main unit with abnormal operation, or the parameters of the host and the preset parameters are used in combination to correct the parameters of the ring main unit with abnormal operation, until the ring main unit has no abnormality after running for T cycles after correction.

[0006] Furthermore, when setting the preset parameters in the first control mode, historical data of all ring network cabinets on site are obtained, data without abnormalities in the operation of the ring network cabinets are selected from the historical data, and the parameter average value of each component in each ring network cabinet is calculated based on the data without abnormalities, and then the sum of the parameter average values ​​of the same components in all ring network cabinets is calculated, and then the final average value is calculated by combining the sum and the total number of ring network cabinets, and the final average value is the preset parameter.

[0007] Furthermore, when obtaining the preset parameters, unqualified data is eliminated from the historical data, and the unqualified data includes the data of the ring main unit with the shortest operating time, the data of the ring main unit with the most maintenance times, and the data of the ring main unit with the highest operating temperature. After eliminating the unqualified data, the preset parameters are calculated using the remaining historical data, and before setting the parameters of the ring main unit with the preset parameters, the average value of the ambient temperature of the ring main unit in the historical data is obtained in advance, and the average value of the ambient temperature is used as the temperature reference to set the temperature of the environment in which the current ring main unit is located.

[0008] Furthermore, when the host is selected in the second control mode, the average value of the operating parameters of each component of all ring main units within the T period is calculated, the average value is compared with the preset parameters, and the ring main unit corresponding to the average value closest to the preset parameters is selected as the host.

[0009] Furthermore, in the third control mode, when the parameters of the abnormal ring network cabinet are corrected using the parameters of the host or the preset parameters, the size of the parameters corrected each time is not greater than the reference parameter, and the reference parameter is the difference A between the preset parameter and the average parameter value of the host within the T period, or the difference B between the average value of the operating parameters of the host within the T period and the average value of the operating parameters of any slave machine is used as the reference parameter; or, the average value of the difference A and the difference B is used as the reference parameter.

[0010] Furthermore, the storage module stores a plurality of storage areas and a calling module; One storage area is configured with a corresponding calling module, and one storage area is used to store the operating parameters and rated parameters of a ring network cabinet, until all ring network cabinets have a corresponding unique storage area for storing the operating parameters and rated parameters; the storage area and the calling module are connected to the background control center, and any calling module can be started through the background control center to access the operating parameters and rated parameters of the ring network cabinet in the storage area corresponding to the calling module.

[0011] Furthermore, the storage module stores an optimization module for eliminating unqualified data when obtaining preset parameters; Each of the calling modules is matched with a corresponding optimization module; The optimization module is provided with a data identification unit and a second controller, the second controller is connected to the background control center, and the data identification unit is connected to the calling module; The second controller sends the historical data of all ring main units to the corresponding data identification unit by calling the module; The data identification unit is provided with a threshold parameter for selecting the operating parameters of the qualified ring main unit from the historical data of the ring main unit; The threshold parameter forms a value range based on the rated parameter and the preset parameter of the ring main unit, and the operating parameters of the ring main unit falling within the value range are qualified data, otherwise they are unqualified data; The final determination of the preset parameters is calculated based on the qualified data.

[0012] Furthermore, the corresponding ring main unit can be overhauled in advance based on the unqualified data; The unqualified data includes: first unqualified data and second unqualified data; The first unqualified data includes regular changes in the abnormal parameters of the ring network cabinet, which can be preliminarily determined that there is an abnormality in the power supply line of the ring network cabinet. If the abnormal parameters of the ring network cabinet do not change regularly, it is the second unqualified data, which can be preliminarily determined that there is an abnormality in the components inside the network cabinet. Before setting the first control mode for the ring network cabinet, the ring network cabinet with unqualified data should be inspected in advance.

[0013] Furthermore, the monitoring system also includes an early warning unit, which is connected to the background control center and is used to monitor the ring main unit during operation and issue an alarm when the operating parameters reach the rated parameters.

[0014] Furthermore, a plurality of numerical units are provided in the storage area, the numerical units are connected to the background control center, the numerical units are numbered in sequence, and one numerical unit stores the maximum operating parameter of a ring main unit when it operates within a set period, until all the numerical units correspond to a ring main unit that matches; The early warning unit operates in real time, and the background control center calls the data in the numerical unit in real time or regularly through the calling module, and sends the data in the numerical unit to the early warning unit. The early warning unit is provided with the second controller, and the data in the numerical unit is compared with the rated parameters of the ring network cabinet through the second controller. When the maximum operating parameters of the ring network cabinet are the same as the rated parameters during the comparison process, the early warning unit sends an alarm prompt to the background control center, and the background control center can determine the corresponding ring network cabinet through the corresponding number, thereby quickly identifying the ring network cabinet that needs to be adjusted.

[0015] Beneficial effects of the present invention: The present application performs initial parameter settings on the ring main unit so that the ring main unit operates according to the initial parameters. After the set operation cycle, secondary parameter settings can be performed based on the ring main unit that operates normally, and parameter correction can be performed on the ring main unit that operates abnormally. The ring main unit is monitored through three control modes, and when an abnormality occurs, the abnormal ring main unit is processed in time with reference to the first control mode and the second control mode through the set third control mode to restore normal operation. Compared with the existing abnormal maintenance process, it is more efficient, thereby reducing safety hazards and facilitating the management of the entire power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the process provided by the present invention; Figure 2 A schematic diagram of the connection of storage areas in the storage module provided by the present invention; Figure 3 This is a schematic diagram of the early warning unit flow provided by the present invention. DETAILED DESCRIPTION

[0017] 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.

[0018] See also Figure 1-3 ,The present invention provides a ring main unit monitoring system, including: a background control center and a storage module; The storage module stores a plurality of control modes for monitoring the ring main unit during operation, wherein the control modes include a first control mode, a second control mode and a third control mode; The background control center is connected to all ring main units on site for communication; The first control mode is that all ring main units on site operate within a preset parameter range, and the preset parameters are normal operating parameters obtained from historical data of the ring main units; The second control mode is that after the ring main unit runs for T cycles in the first control mode, the operating parameters of all ring main units within the T cycle are obtained through the data acquisition unit, and the obtained operating parameters are sent to the first controller. The first controller compares the received operating parameters of the ring main unit with the rated parameters of the ring main unit. If the operating parameters of all ring main units at any time within the T cycle are within the rated parameter range, it indicates that the operating parameters of the ring main unit do not exceed the rated parameters. An operating parameter closest to the preset parameters in the first mode is selected from the operating parameters of all ring main units within the T cycle, and the ring main unit corresponding to the operating parameter is used as the host, and other ring main units are used as slaves. The operating parameters of the host at any time within the T cycle are used as control parameters, so that other ring main units are set according to the control parameters; The third control mode is that after the ring main unit runs for T cycles in the first control mode, the operating parameters of all the ring main unit at a certain moment are obtained. If the operating parameters of a ring main unit exceed the rated parameter range, the parameters of the host in the second control mode are used to correct the parameters of the ring main unit with abnormal operation, or the preset parameters in the first mode are used to correct the parameters of the ring main unit with abnormal operation, or the parameters of the host and the preset parameters are used in combination to correct the parameters of the ring main unit with abnormal operation, until the ring main unit has no abnormality after running for T cycles after correction.

[0019] Among them, the main invention point of the present application is that the ring main unit can be initially set through the first control mode, and can be set again through the second control mode after the ring main unit runs for a set period. After the ring main unit runs for a set period under the second control mode, the abnormal ring main unit can be set through the third control mode, and the third control mode is set based on the first control mode and the second control mode, so that the three control modes can be linked to each other, so that the ring main unit can work stably during the entire operation process, and when the ring main unit has an abnormality during operation, it can be quickly adjusted based on the first control mode and the second control mode to restore it to normal.

[0020] In some embodiments, when setting the preset parameters in the first control mode, historical data of all ring network cabinets on site are obtained, and data without abnormalities during the operation of the ring network cabinets are selected from the historical data. The parameter average value of each component in each ring network cabinet is calculated based on the data without abnormalities, and then the sum of the parameter average values ​​of the same components in all ring network cabinets is calculated, and then the final average value is calculated by adding the sum and the total number of ring network cabinets. The final average value is the preset parameter.

[0021] When obtaining preset parameters, unqualified data is eliminated from historical data, and the unqualified data includes data of the ring main unit with the shortest operating time, data of the ring main unit with the most maintenance times, and data of the ring main unit with the highest operating temperature. After eliminating the unqualified data, the preset parameters are calculated using the remaining historical data. Before setting the parameters of the ring main unit with the preset parameters, the average temperature of the ambient environment in which the ring main unit is located in the historical data is obtained in advance, and the average ambient temperature is used as the temperature reference to set the temperature of the environment in which the current ring main unit is located.

[0022] Among them, in order to make the ring main unit run more stably, the setting of initial parameters is related to the operation cycle of the ring main unit. Therefore, the setting of initial parameters (i.e., preset parameters) can be selected according to historical data. When selecting data, in order to increase the accuracy of the data, unqualified data will be eliminated. The unqualified data at least includes the ring main unit data with the shortest operation time, the most maintenance times (i.e., the failure frequency), and the highest internal temperature during operation.

[0023] In addition, in order to avoid the normal operation of the ring network cabinet being affected by the difference in ambient temperature, the ambient temperature is also an important influencing factor when setting the parameters of the ring network cabinet. Therefore, the ambient temperature data in the historical data can be obtained, and the current ambient temperature of the ring network cabinet can be set according to the ambient temperature data, thereby reducing the normal operation of the ring network cabinet affected by excessive temperature differences.

[0024] In some embodiments, when the host is selected in the second control mode, the average value of the operating parameters of each component of all ring main units within a T period (at least 7 days) is calculated, the average value is compared with the preset parameters, and the ring main unit corresponding to the average value closest to the preset parameters is selected as the host.

[0025] In some embodiments, in the third control mode, when the parameters of the abnormal ring network cabinet are corrected using the parameters of the host or the preset parameters, the size of the parameters corrected each time is no greater than the reference parameter, and the reference parameter is the difference A between the preset parameter and the average parameter value of the host within the T period, or the difference B between the average value of the operating parameters of the host within the T period and the average value of the operating parameters of any slave machine is used as the reference parameter; or, the average value of the difference A and the difference B is used as the reference parameter.

[0026] Among them, when correcting the parameters of an abnormal ring main unit, the set reference parameters can avoid affecting the supporting operation of the entire power system due to excessive parameter changes when correcting the parameters of the ring main unit.

[0027] In some embodiments, the storage module stores a plurality of storage areas and calling modules; One storage area is configured with a corresponding calling module, and one storage area is used to store the operating parameters and rated parameters of a ring network cabinet, until all ring network cabinets have a corresponding unique storage area for storing the operating parameters and rated parameters; the storage area and the calling module are connected to the background control center, and any calling module can be started through the background control center to access the operating parameters and rated parameters of the ring network cabinet in the storage area corresponding to the calling module.

[0028] Among them, by dividing into multiple storage areas, the data of the ring network cabinet is stored separately. When accessing data, data can be quickly searched, and data management and control are also facilitated.

[0029] In some embodiments, the storage module stores an optimization module for eliminating unqualified data when obtaining preset parameters; Each of the calling modules is matched with a corresponding optimization module; The optimization module is provided with a data identification unit and a second controller, the second controller is connected to the background control center, and the data identification unit is connected to the calling module; The second controller sends the historical data of all ring main units to the corresponding data identification unit by calling the module; The data identification unit is provided with a threshold parameter for selecting the operating parameters of the qualified ring main unit from the historical data of the ring main unit; The threshold parameter forms a value range based on the rated parameter and the preset parameter of the ring main unit, and the operating parameters of the ring main unit falling within the value range are qualified data, otherwise they are unqualified data; The final determination of the preset parameters is calculated based on the qualified data.

[0030] Among them, when eliminating unqualified data, the background control center starts the second controller, the second controller starts the calling module, the calling module accesses the operating parameters of all ring network cabinets from the historical data, and selects an optimization module for input corresponding to the operating parameters of all ring network cabinets. When there is data input in the optimization module, the optimization module imports the received data into the data identification unit and compares it with the threshold parameter, and judges the data falling within the threshold parameter range as qualified data, otherwise it is abnormal data. The qualified data is retained in the data identification unit, and the data identification unit sends the retained qualified data to the second controller, and the second controller sends the received data to the background control center, and the background control center calculates the preset parameters based on the received data; In some embodiments, the corresponding ring main unit may be overhauled in advance based on the unqualified data; The unqualified data includes: first unqualified data and second unqualified data; If there is a regular change in the abnormal parameters of a ring main unit in the unqualified data, it can be preliminarily determined that there is a voltage fluctuation problem in the line supplying power to the ring main unit. During maintenance, the power supply line is checked first. This abnormal situation is classified as the first unqualified data; if the abnormal parameters of the ring main unit do not change regularly, it is the second unqualified data, and it can be preliminarily determined that there is an abnormality in the components inside the network cabinet; therefore, before setting the first control mode for the ring main unit, the ring main unit with unqualified data is preliminarily repaired.

[0031] Among them, the role of the optimization module is to increase the convenience of selecting normal data based on historical data, and at the same time to improve the accuracy of the selected data, to avoid problems such as misjudgment when manually removing abnormal data, and at the same time, to make preliminary abnormal judgments on the ring network cabinet based on the abnormal data. Based on the preliminary abnormal judgment, the ring network cabinet can be repaired accordingly, thereby reducing the frequency of abnormalities in the ring network cabinet under the first control mode.

[0032] In some embodiments, the monitoring system further includes an early warning unit, which is connected to the background control center and is used to monitor the ring main unit during operation and issue an alarm when the operating parameters reach the rated parameters.

[0033] A plurality of numerical units are provided in the storage area, and the numerical units are numbered in sequence. For example, the numerical units are numbered in sequence 1, 2, 3...n, and one numerical unit stores the maximum operating parameter of a ring main unit when it operates within a set period, until all the numerical units correspond to a ring main unit that matches; The early warning unit operates in real time, and the background control center calls the data in the numerical unit in real time or regularly through the calling module, and sends the data in the numerical unit to the early warning unit. The early warning unit is provided with the second controller, and the data in the numerical unit is compared with the rated parameters of the ring network cabinet through the second controller. When the maximum operating parameters of the ring network cabinet are the same as the rated parameters during the comparison process, the early warning unit sends an alarm prompt to the background control center. The background control center can determine the corresponding ring network cabinet through the corresponding number, thereby quickly identifying the ring network cabinet that needs to be adjusted.

[0034] Among them, the role of the early warning unit is to issue an early warning when the operating parameters of the ring main unit reach the edge of abnormality, so that technical personnel can confirm and repair it in time, thereby reducing the failure rate of the ring main unit and improving the operating stability of the entire power system.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A ring main unit monitoring system, characterized in that: include: Backend control center and storage module; The storage module stores a plurality of control modes for monitoring the ring main unit during operation, wherein the control modes include a first control mode, a second control mode and a third control mode; The background control center is connected to all ring main units on site for communication; The first control mode is that all ring main units on site operate within a preset parameter range, and the preset parameters are normal operating parameters obtained from historical data of the ring main units; When obtaining preset parameters, unqualified data is eliminated from historical data, and the unqualified data includes data of the ring main unit with the shortest operating time, data of the ring main unit with the most maintenance times, and data of the ring main unit with the highest operating temperature. After eliminating the unqualified data, the preset parameters are calculated with the remaining historical data, and then the parameter average value of each component in each ring main unit is calculated based on the remaining qualified historical data, and then the sum of the parameter average values ​​of the same components in all ring main units is calculated, and then the final average value is calculated by the sum and the total number of ring main units. The final average value is the preset parameter, and before setting the parameters of the ring main unit with the preset parameters, the average value of the ambient temperature of the ring main unit in the historical data is obtained in advance, and the average value of the ambient temperature is used as the temperature reference to set the temperature of the environment in which the current ring main unit is located; The storage module stores a plurality of storage areas and a calling module; One storage area is configured with one calling module, and one storage area is used to store the operating parameters and rated parameters of a ring main unit, until all ring main units have a unique storage area for storing the operating parameters and rated parameters; the storage area and the calling module are connected to the background control center, and any calling module can be started through the background control center to access the operating parameters and rated parameters of the ring main unit in the storage area corresponding to the calling module; The storage module stores an optimization module for eliminating unqualified data when obtaining preset parameters; Each of the calling modules is matched with a corresponding optimization module; The optimization module is provided with a data identification unit and a second controller, the second controller is connected to the background control center, and the data identification unit is connected to the calling module; The second controller sends the historical data of all ring main units to the corresponding data identification unit by calling the module; The data identification unit is provided with a threshold parameter for selecting the operating parameters of the qualified ring main unit from the historical data of the ring main unit; The threshold parameter forms a value range based on the rated parameter and the preset parameter of the ring main unit, and the operating parameters of the ring main unit falling within the value range are qualified data, otherwise they are unqualified data; The final determination of the preset parameters is calculated based on the qualified data; The second control mode is that after the ring main unit runs for T cycles in the first control mode, the operating parameters of all ring main units within the T cycle are obtained through the data acquisition unit, and the obtained operating parameters are sent to the first controller. The first controller compares the received operating parameters of the ring main unit with the rated parameters of the ring main unit. If the operating parameters of all ring main units at any time within the T cycle are within the rated parameter range, it indicates that the operating parameters of the ring main unit do not exceed the rated parameters. An operating parameter closest to the preset parameters in the first mode is selected from the operating parameters of all ring main units within the T cycle, and the ring main unit corresponding to the operating parameter is used as the host, and other ring main units are used as slaves. The operating parameters of the host at any time within the T cycle are used as control parameters, so that other ring main units are set according to the control parameters; The third control mode is that after the ring main unit runs for T cycles in the first control mode, the operating parameters of all the ring main units at a certain moment are obtained. If the operating parameters of a ring main unit exceed the rated parameter range, the parameters of the host in the second control mode are used to correct the parameters of the ring main unit with abnormal operation, or the preset parameters in the first mode are used to correct the parameters of the ring main unit with abnormal operation, or the parameters of the host and the preset parameters are used in combination to correct the parameters of the ring main unit with abnormal operation, until the corrected ring main unit has no abnormality after running for T cycles; An early warning unit, which is connected to the background control center and is used to monitor the ring main unit during operation and issue an alarm when the operating parameters reach the rated parameters; A plurality of numerical units are provided in the storage area, the numerical units are connected to the background control center, the numerical units are numbered in sequence, and one numerical unit stores the maximum operating parameter of a ring main unit when it runs within a set period, until all the numerical units correspond to a ring main unit that matches; The early warning unit operates in real time, and the background control center calls the data in the numerical unit in real time or regularly through the calling module, and sends the data in the numerical unit to the early warning unit. The early warning unit is provided with the second controller, and the data in the numerical unit is compared with the rated parameters of the ring network cabinet through the second controller. When the maximum operating parameters of the ring network cabinet are the same as the rated parameters during the comparison process, the early warning unit sends an alarm prompt to the background control center. The background control center can determine the corresponding ring network cabinet through the corresponding number, thereby quickly identifying the ring network cabinet that needs to be adjusted.

2. The ring main unit monitoring system according to claim 1, characterized in that: When the host is selected in the second control mode, the average value of the operating parameters of each component of all ring main units within the T period is calculated, the average value is compared with the preset parameters, and the ring main unit corresponding to the average value closest to the preset parameters is selected as the host.

3. The ring main unit monitoring system according to claim 1, characterized in that: In the third control mode, when the parameters of the abnormal ring network cabinet are corrected using the parameters of the host or the preset parameters, the size of the parameters corrected each time is no greater than the reference parameter, which is the difference A between the preset parameter and the average parameter value of the host within the T period, or the difference B between the average value of the operating parameters of the host within the T period and the average value of the operating parameters of any slave as the reference parameter; or, the average value of the difference A and the difference B is used as the reference parameter.

4. The ring main unit monitoring system according to claim 1, characterized in that: Based on the unqualified data, the corresponding ring main unit can be overhauled in advance; The unqualified data includes: first unqualified data and second unqualified data; The first unqualified data includes regular changes in the abnormal parameters of the ring network cabinet, which can be preliminarily determined that there is an abnormality in the power supply line of the ring network cabinet. If the abnormal parameters of the ring network cabinet do not change regularly, it is the second unqualified data, which can be preliminarily determined that there is an abnormality in the components inside the network cabinet. Before setting the first control mode for the ring network cabinet, the ring network cabinet with unqualified data should be inspected in advance.

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