Intelligent power distribution monitoring system applied to transformer district

Abstract

The application belongs to the technical field of power distribution monitoring, and is specifically an intelligent power distribution monitoring system applied to a transformer area; comprising a field measurement and control layer, a network communication layer and a system management layer; the field measurement and control layer comprises a power distribution monitoring module and a command execution module, the network communication layer is used for realizing data exchange between the field measurement and control layer and the system management layer; the system management layer comprises a monitoring host computer, the monitoring host computer is divided into a data processor and an execution controller; the data processor sets a trend period F1, and obtains busbar cable temperature value averages and environmental temperature value averages in the previous M trend periods with the current time as a node, and calculates an early warning coefficient; the data processor sets an early warning coefficient threshold value, when the calculated early warning coefficient is greater than the early warning coefficient threshold value, the data processor sends an early warning signal to the execution controller, and the execution controller sends a power distribution room early warning signal to the command execution module through the network communication layer.

Description

Technical Field

[0001] This invention belongs to the field of power distribution monitoring technology, specifically to an intelligent power distribution monitoring system applied to transformer substations. Background Technology

[0002] A power distribution monitoring system is designed for the power distribution and transformation links in a power supply and distribution system. It utilizes modern computer control technology, communication technology, and network technology, employs communication equipment with strong anti-interference capabilities and intelligent power meters, and is configured through power monitoring and management software to achieve system monitoring and management.

[0003] Most existing power distribution monitoring systems use a single method for intelligent monitoring, without considering multiple aspects of intelligent monitoring to determine potential electrical fires or other forms of loss during the power distribution process.

[0004] Therefore, this invention proposes an intelligent power distribution monitoring system applicable to transformer substations. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0006] To achieve the above objectives, an intelligent power distribution monitoring system for transformer substations is proposed according to an embodiment of the first aspect of the present invention, comprising a field measurement and control layer, a network communication layer, and a system management layer;

[0007] The field monitoring and control layer includes a power distribution monitoring module and a command execution module. The power distribution monitoring module is used to collect and acquire power operation parameter data and environmental parameter data. The command execution module is used to execute command signals from the system management layer. The power operation parameter data and environmental parameter data include busbar cable current, busbar cable temperature, ambient temperature, and smoke gas concentration.

[0008] The network communication layer is used to enable data exchange between the field measurement and control layer and the system management layer;

[0009] The system management layer includes a monitoring host, which is divided into a data processor for processing power operation parameter data and environmental parameter data, and an execution controller for receiving signals from the data processor.

[0010] The data processor sets the trend period F1 and obtains the average value of the busbar cable temperature and the average value of the ambient temperature within the previous M trend periods with the current time as the node, and calculates the warning coefficient.

[0011] The data processor sets a warning coefficient threshold. When any of the calculated warning coefficients exceeds the warning coefficient threshold, the data processor sends a warning signal to the execution controller. The execution controller then sends a power distribution room warning signal to the command execution module through the network communication layer.

[0012] Furthermore, the power distribution monitoring module includes a current monitoring device installed on the busbar, a temperature measuring device, a temperature measuring device installed inside the power distribution room, and a smoke and gas monitoring device.

[0013] Furthermore, the current monitoring device, temperature measuring device, and smoke gas monitoring device are powered by separate lines; and the current monitoring device, temperature measuring device, and smoke gas monitoring device are electrically connected to the communication monitoring host, which sends the monitoring data of the current monitoring device, temperature measuring device, and smoke gas monitoring device to the network communication layer.

[0014] Furthermore, the monitoring host is equipped with multiple power distribution monitoring software programs. The monitoring host combines these multiple power distribution monitoring software programs to control the power distribution monitoring module to acquire power operation parameter data and environmental parameter data.

[0015] Furthermore, the data processor's processing of power operation parameter data and environmental parameter data includes:

[0016] The data processor marks the busbar cable current as Iit, where i is the busbar cable number, i is a positive integer, and i = 1, 2, ..., n; t is the time stamp for transmitting data;

[0017] The data processor sets a monitoring period F and obtains the average value of the busbar cable current within the monitoring period F. The data processor sets different current thresholds Ii0 according to different busbar cables;

[0018] When there is an average current of any busbar cable When the current exceeds the current threshold Ii0, the data processor sends a warning signal to the execution controller.

[0019] Furthermore, the data processor's processing of power operation parameter data and environmental parameter data also includes:

[0020] The data processor labels the busbar cable temperature value as Tit; the ambient temperature value as Kt; and the smoke gas concentration value as Nt.

[0021] The data processor sets the trend period F1, and the data processing module obtains the average value of the busbar cable temperature and the average value of the ambient temperature within the previous M trend periods with the current time as the node, and marks them as follows:

[0022] Ti1, Ti2, ... TiM;

[0023] K1, K2, ..., KM;

[0024] The data processor calculates the early warning coefficient YJi using a formula, which is as follows:

[0025]

[0026] Where α and β represent the influence coefficients of busbar cable temperature and ambient temperature, respectively, and both α and β are greater than 0 and less than 1.

[0027] The data processor sets a warning coefficient threshold. When all calculated warning coefficients YJi are less than or equal to the warning coefficient threshold, the data processor does not perform any processing.

[0028] When any of the calculated warning coefficients YJi is greater than the warning coefficient threshold, the data processor sends a warning signal to the execution controller.

[0029] Furthermore, when the data processor receives a non-zero smoke gas concentration value, it directly sends an alarm signal to the execution controller. When the execution controller receives the alarm signal, it sends an alarm signal from the power distribution room to the command execution module through the network communication layer.

[0030] Furthermore, the command signals of the system management layer include power distribution room early warning signals and power distribution room alarm signals.

[0031] Furthermore, the command execution module includes an alarm bell and a closing mechanism.

[0032] Compared with the prior art, the beneficial effects of the present invention are:

[0033] This invention is equipped with a field measurement and control layer, a network communication layer, and a system management layer. The field measurement and control layer is used to collect and acquire power operation parameter data and environmental parameter data. The collected data includes operation parameter data and environmental parameter data. Starting from both operation and environment aspects, it combines problems in the operation process and environmental changes in the power distribution room to carry out intelligent power distribution monitoring.

[0034] This invention addresses both the current and temperature of the busbar cable. When the on-site monitoring and control layer detects that the current exceeds the standard within a cycle, it directly issues an alarm, which can effectively prevent the cable from operating under high current for a long time, thus avoiding the occurrence of electrical fires.

[0035] Furthermore, assuming the current does not exceed the limit, the system calculates a warning coefficient based on cable temperature and ambient temperature to determine the possibility of electrical fire. If any warning coefficient exceeds the warning coefficient threshold, an alarm is immediately triggered to prevent fire and effectively reduce losses.

[0036] Furthermore, this invention is equipped with a smoke and gas monitoring device, which will directly trigger an alarm when smoke and gas are produced by an open flame, effectively preventing the fire from growing larger or spreading, and is also an effective measure to reduce losses. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the present invention. Detailed Implementation

[0038] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. 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.

[0039] like Figure 1 As shown, the intelligent power distribution monitoring system applied to the transformer area includes a field measurement and control layer, a network communication layer, and a system management layer.

[0040] The field monitoring and control layer includes a power distribution monitoring module and a command execution module. The power distribution monitoring module is used to collect and acquire power operation parameter data and environmental parameter data, and the command execution module is used to execute command signals from the system management layer.

[0041] Among them, the power operation parameter data and environmental parameter data include busbar cable current, busbar cable temperature, ambient temperature, and smoke gas concentration.

[0042] It should be noted that the power distribution monitoring module specifically includes a current monitoring device and a temperature measuring device installed on the busbar, a temperature measuring device installed inside the power distribution room, and a smoke and gas monitoring device.

[0043] Among them, the current monitoring device, temperature measuring device and smoke gas monitoring device are powered by separate lines; and multiple current monitoring devices, temperature measuring devices and smoke gas monitoring devices are electrically connected to the communication monitoring host, which sends the monitoring data of the current monitoring device, temperature measuring device and smoke gas monitoring device to the network communication layer.

[0044] The network communication layer is used to realize data exchange between the field measurement and control layer and the system management layer. The network communication layer includes communication management unit, Ethernet gateway, multi-serial port server, Ethernet switch, fiber optic transceiver, optical switch and communication equipment and lines such as optical cable and communication cable for routing. According to the actual situation of each project, the corresponding network structure is designed and the corresponding communication equipment is configured.

[0045] As an embodiment of the present invention, for a system with a single substation, a network organization of fieldbus and Ethernet is adopted.

[0046] As another embodiment of the present invention, for a system with multiple substations, a network organization combining fiber optic communication network with fieldbus and Ethernet is adopted, wherein fiber optic star network or fiber optic redundant ring network is used between stations, and fieldbus and Ethernet network are used within the station.

[0047] The system management layer includes a monitoring host, which has multiple power distribution monitoring software installed inside. The monitoring host uses a high-performance computer to combine multiple power distribution monitoring software and control the power distribution monitoring module to acquire power operation parameter data and environmental parameter data, thereby realizing intelligent power distribution monitoring.

[0048] It should be noted that the monitoring host has an Ethernet interface, which enables the power distribution monitoring system to communicate with DCS systems, building monitoring systems, fire protection systems, energy management systems, and power supply bureau dispatch systems, thereby enabling data uploading.

[0049] The monitoring host is divided into a data processor for processing power operation parameter data and environmental parameter data, and an execution controller for receiving signals from the data processor.

[0050] Specifically, the data processor's processing of power operation parameter data and environmental parameter data includes the following steps:

[0051] Step 1: The data processor marks the received power operation parameter data and environmental parameter data respectively, as follows: busbar cable current Iit, since there are multiple busbar cables in a distribution room, i is the busbar cable number, i is a positive integer, and i = 1, 2...n; busbar cable temperature Tit; ambient temperature Kt; smoke gas concentration Nt;

[0052] It should be noted that t here is the timestamp for sending data;

[0053] Step 2: The data processor sets the monitoring period F and obtains the average value of the busbar cable current within the monitoring period F. The data processor sets different current thresholds Ii0 according to different busbar cables;

[0054] Step 3: When there is an average current of any busbar cable If the current exceeds the current threshold Ii0, proceed to step seven.

[0055] When there is no busbar cable current average value If the current exceeds the threshold Ii0, proceed to step four:

[0056] Step 4: The data processor sets the trend period F1. The data processing module obtains the average value of the busbar cable temperature and the average value of the ambient temperature within the previous M trend periods, with the current time as the node, and marks them as follows:

[0057] Ti1, Ti2, ... TiM;

[0058] K1, K2, ..., KM;

[0059] Step 5: The data processor calculates the warning coefficient YJi using a formula, where the formula for calculating the warning coefficient YJi is:

[0060]

[0061] Where α and β represent the influence coefficients of busbar cable temperature and ambient temperature, respectively, and both α and β are greater than 0 and less than 1.

[0062] Step 6: The data processor sets the warning coefficient threshold. When the calculated warning coefficients YJi are all less than or equal to the warning coefficient threshold, the data processor does not perform any processing.

[0063] If any of the calculated warning coefficients YJi is greater than the warning coefficient threshold, proceed to step seven.

[0064] Step 7: The data processor sends an early warning signal to the execution controller. After receiving the early warning signal, the execution controller sends the power distribution room early warning signal to the command execution module through the network communication layer.

[0065] It should be noted that the command execution module includes an alarm bell and a closing mechanism. The alarm bell will broadcast an alarm sound after receiving an alarm signal from the power distribution room.

[0066] Upon receiving the gate opening signal, the closing mechanism controls the main relay inside the power distribution room to disconnect the gate.

[0067] It should be noted that when the data processor receives the smoke gas concentration value Nt and the smoke gas concentration value Nt is not zero, the data processor directly sends an alarm signal to the execution controller. When the execution controller receives the alarm signal, the execution controller sends the power distribution room alarm signal to the command execution module through the network communication layer.

[0068] The command execution module sends an opening signal to the closing mechanism, which then controls the main relay inside the power distribution room to disconnect the gate.

[0069] It should be noted that the monitoring host also includes a data storage device for data storage. The data storage device is used to store data, including the busbar cable current, busbar cable temperature, ambient temperature, and smoke gas concentration values ​​monitored by the current monitoring device, temperature measuring device, and smoke gas monitoring device.

[0070] In addition, the data storage device is also used to store the number of alarms of the warning bell and the reasons why the data processor sends the warning signal to the execution controller. It should be noted that the reasons why the data processor sends the warning signal to the execution controller include busbar cable current alarm and warning coefficient exceeding the limit alarm; and records the busbar cable number i corresponding to the busbar cable current alarm.

[0071] When the number of current alarms for the same busbar cable exceeds P, the data storage sends a replacement signal to the execution controller, which then performs the corresponding busbar cable replacement.

[0072] The above formulas are all numerical calculations after removing dimensions. The formulas are obtained by software simulation based on a large amount of data and are closest to the real situation. The preset parameters and preset thresholds in the formulas are set by those skilled in the art according to the actual situation or obtained by simulation based on a large amount of data.

[0073] The working principle of this invention is as follows: The field measurement and control layer includes a power distribution monitoring module and a command execution module. The power distribution monitoring module is used to collect power operation parameter data and environmental parameter data, and the command execution module is used to execute command signals from the system management layer. The power operation parameter data and environmental parameter data include busbar cable current, busbar cable temperature, ambient temperature, and smoke gas concentration. The network communication layer is used to realize data exchange between the field measurement and control layer and the system management layer. The system management layer includes a monitoring host, which is divided into a data processor for processing power operation parameter data and environmental parameter data, and an execution controller for receiving signals from the data processor. The data processor sets a trend period F1 and obtains the average value of the busbar cable temperature and the average value of the ambient temperature within the previous M trend periods with the current time as the node, and calculates the warning coefficient. The data processor sets a warning coefficient threshold. When any of the calculated warning coefficients is greater than the warning coefficient threshold, the data processor sends a warning signal to the execution controller. The execution controller sends a power distribution room warning signal to the command execution module through the network communication layer. The command execution module includes a warning bell and a closing mechanism. The warning bell broadcasts a warning sound after receiving the power distribution room warning signal.

[0074] The above embodiments are only used to illustrate the technical methods of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of the present invention without departing from the spirit and scope of the technical methods of the present invention.

Claims

1. An intelligent power distribution monitoring system applied to transformer substations, characterized in that, This includes the field measurement and control layer, the network communication layer, and the system management layer; The field monitoring and control layer includes a power distribution monitoring module and a command execution module. The power distribution monitoring module is used to collect and acquire power operation parameter data and environmental parameter data. The command execution module is used to execute command signals from the system management layer. The power operation parameter data and environmental parameter data include busbar cable current, busbar cable temperature, ambient temperature, and smoke gas concentration. The network communication layer is used to enable data exchange between the field measurement and control layer and the system management layer; The system management layer includes a monitoring host, which is divided into a data processor for processing power operation parameter data and environmental parameter data, and an execution controller for receiving signals from the data processor. Data processor sets trend period And obtain the average value of the busbar cable temperature and the average value of the ambient temperature in the previous M trend periods with the current time as the node, and calculate the warning coefficient; The data processor sets a warning coefficient threshold. When any of the calculated warning coefficients is greater than the warning coefficient threshold, the data processor sends a warning signal to the execution controller. The execution controller then sends a power distribution room warning signal to the command execution module through the network communication layer. The data processor's processing of power operation parameter data and environmental parameter data also includes: The data processor marks the busbar cable temperature value as The ambient temperature value is marked as The smoke gas concentration value is marked as ; Data processor sets trend period The data processing module obtains the average busbar cable temperature and the average ambient temperature over the previous M trend periods, with the current time as the node, and marks them as follows: 、 、…… ； 、 、……、 ； The data processor uses a calculation formula to calculate the early warning coefficient. The warning coefficient among them The calculation formula is: Among them These represent the influence coefficients of busbar cable temperature and ambient temperature, respectively. All are greater than 0 and less than 1; The data processor sets a warning coefficient threshold; when the calculated warning coefficient... If all values ​​are less than or equal to the warning coefficient threshold, the data processor will not perform any processing. When the calculated warning coefficient If any value exceeds the warning coefficient threshold, the data processor sends a warning signal to the execution controller.

2. The intelligent power distribution monitoring system applied to a transformer substation according to claim 1, characterized in that, The power distribution monitoring module includes a current monitoring device and a temperature measuring device installed on the busbar, a temperature measuring device installed inside the power distribution room, and a smoke and gas monitoring device.

3. The intelligent power distribution monitoring system applied to a transformer substation according to claim 2, characterized in that, The current monitoring device, temperature measuring device, and smoke gas monitoring device are powered by separate lines; and the current monitoring device, temperature measuring device, and smoke gas monitoring device are electrically connected to the communication monitoring host, which sends the monitoring data of the current monitoring device, temperature measuring device, and smoke gas monitoring device to the network communication layer.

4. The intelligent power distribution monitoring system applied to a transformer substation according to claim 1, characterized in that, The monitoring host has multiple power distribution monitoring software programs installed inside. The monitoring host, in conjunction with these multiple power distribution monitoring software programs, controls the power distribution monitoring module to acquire power operation parameter data and environmental parameter data.

5. The intelligent power distribution monitoring system applied to a transformer substation according to claim 1, characterized in that, The data processor's processing of power operation parameter data and environmental parameter data includes: The data processor marks the busbar cable current as ,in This refers to the numbering of the busbar cables. It is a positive integer, and =1,2…… ; A timestamp for sending data; Data processor sets monitoring cycle and obtain the monitoring period respectively. Average current of busbar cables inside The data processor sets different current thresholds for different busbar cables. ; When there is an average current of any busbar cable greater than the current threshold At that time, the data processor sends a warning signal to the execution controller.

6. The intelligent power distribution monitoring system applied to a transformer substation according to claim 1, characterized in that, When the data processor receives a non-zero smoke gas concentration value, it directly sends an alarm signal to the execution controller. When the execution controller receives the alarm signal, it sends an alarm signal from the power distribution room to the command execution module through the network communication layer.

7. The intelligent power distribution monitoring system applied to a transformer substation according to claim 1, characterized in that, The command signals of the system management layer include power distribution room early warning signals and power distribution room alarm signals.

8. The intelligent power distribution monitoring system applied to a transformer substation according to claim 1, characterized in that, The command execution module includes an alarm bell and a closing mechanism.

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