CN221326651U - Alternating current intelligent on-line monitoring system for power station - Google Patents
Alternating current intelligent on-line monitoring system for power station Download PDFInfo
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- CN221326651U CN221326651U CN202322836796.1U CN202322836796U CN221326651U CN 221326651 U CN221326651 U CN 221326651U CN 202322836796 U CN202322836796 U CN 202322836796U CN 221326651 U CN221326651 U CN 221326651U
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Abstract
The utility model discloses an alternating current intelligent online monitoring system for a power station, which belongs to the field of power systems and comprises the following components: the intelligent microcomputer monitoring module is connected with the precise current transformers by adopting the alternating current insulation monitoring device and the multifunctional monitoring device, and the precise current transformers are arranged at a plurality of charge detection points to be detected of the segmented single bus. The utility model aims to solve the problems that the traditional alternating current system can only monitor the state of a loop switch, detect basic information such as voltage and current, cannot detect the state of the residual current and load power of the loop and cannot judge whether the insulation is abnormal or not when the alternating current system is in operation, and can comprehensively monitor the state of the residual current, load current, branch state and environment, and comprehensively detect the running state of the alternating current system.
Description
Technical Field
The utility model relates to the field of power systems, in particular to an alternating current intelligent online monitoring system for a power station.
Background
In recent years, the economic construction of China rapidly develops, the social electricity consumption is also greatly increased, and along with the development and perfection of a power system, a station alternating current system is used as an important link of a transformer substation, and provides power for all operating systems, control systems, protection devices, automation devices, communication equipment, fire protection systems and the like in the transformer substation, so that the operation safety and reliability of the system can directly influence the operation conditions of primary and secondary equipment in the transformer substation.
At present, the typical wiring mode of the transformer substation alternating current system is divided into: single bus ATS scheme, single bus segment double ATS scheme, single bus segment 2 incoming line 1 bus scheme. In the traditional mode, the alternating current system of the transformer substation is only monitored in a loop switch state, the incoming line voltage and current information basic information is not detected, the residual current state and the load power of a branch loop cannot be judged, whether insulation is abnormal or not during operation of the alternating current system cannot be judged, and the abnormal alternating current insulation is a potential safety hazard causing electric fire, and if the abnormal alternating current insulation is not processed in time, serious loss is caused.
Publication (bulletin) number: CN211830196U, publication (bulletin) day: 2020-10-30 relate to a cable grounding loop on-line monitoring system, comprising a data acquisition device arranged at the side of a power transmission cable, wherein the data acquisition device is connected with a monitoring device, and the monitoring device is connected with a communication device; the data acquisition device comprises a plurality of main cable current transformers for measuring main cable current signals and a plurality of ground wire current transformers for measuring cable ground wire current signals, and further comprises distributed optical fiber temperature measuring sensors which are arranged on the power transmission cable and used for monitoring the temperature of the power transmission cable and locating fault points in real time on line, wherein the monitoring device acquires and processes the current signals acquired by the main cable current transformers, the ground wire current transformers and the distributed optical fiber temperature measuring sensors, converts the acquired current signals into digital signals, stores the digital signals and transmits the digital signals to the monitoring terminal through the communication device. In the scheme, although the current and the temperature are detected, the insulation condition is not monitored, and safety accidents still easily occur.
Disclosure of utility model
The utility model aims to solve the problems that the traditional alternating current system can only monitor the state of a loop switch, detect basic information such as voltage and current, cannot detect the state of the residual current and load power of the loop and cannot judge whether the insulation is abnormal or not when the alternating current system operates, and provides an alternating current intelligent online monitoring system for the power station, which can comprehensively monitor the state of the alternating current residual current, load current, branch state and environment state and comprehensively detect the operation state of the alternating current system.
In order to achieve the above purpose, the present utility model provides the following solutions: an ac intelligent on-line monitoring system for a power station, comprising: the intelligent microcomputer monitoring module is connected with the precise current transformers by adopting the alternating current insulation monitoring device and the multifunctional monitoring device, and the precise current transformers are arranged at a plurality of charge detection points to be detected of the segmented single bus.
Preferably, the alternating current insulation monitoring device is connected with the precision current transformer and the temperature sensor.
Preferably, the multifunctional monitoring device is connected with the loop switch.
Preferably, a switch loop outgoing cable penetrates through the precision current transformer, and the switch loop outgoing cable is connected with a load through the precision current transformer.
Preferably, the intelligent microcomputer monitoring module is connected with the upper computer, and the intelligent microcomputer monitoring module is communicated with the upper computer through MODBUS protocol or IEC61850 protocol.
Preferably, the intelligent microcomputer monitoring module adopts an alternating current insulation monitoring device and a multifunctional monitoring device to be connected with an audible and visual alarm, and the intelligent microcomputer monitoring module is connected with a smoke alarm.
Preferably, the intelligent microcomputer monitoring module is connected with a display.
The beneficial effects of the utility model are as follows:
(1) The residual current state and load power of the branch circuit can be detected, and whether alternating current insulation abnormality exists or not can be avoided, so that electrical fire disaster can be avoided, and safety is ensured.
(2) The environmental state can be monitored, and whether a fire point exists or not can be monitored through the smoke alarm.
Drawings
Fig. 1 is a schematic diagram of a modular device connection of the present utility model.
Reference numerals in the drawings: 1-intelligent microcomputer monitoring module, 2-alternating current insulation monitoring device, 3-multifunctional monitoring device, 4-precision current transformer, 5-temperature sensor and 6-smoke alarm device.
Detailed Description
Specific embodiments of the utility model will be described in detail below, with the understanding that the embodiments described herein are merely some, but not all embodiments of the utility model. All other embodiments, which can be made by one of ordinary skill in the art without inventive effort, are within the scope of the present utility model based on the following embodiments.
The utility model provides a technical scheme that:
As shown in fig. 1, an ac intelligent on-line monitoring system for a power station includes: the intelligent microcomputer monitoring module 1 and the alternating current insulation monitoring device 2 are connected with the precise current transformers 4 by adopting the alternating current insulation monitoring device 2 and the multifunctional monitoring device 3, and the precise current transformers 4 are arranged at a plurality of charge detection points to be detected of the segmented single bus. The system is used for comprehensively monitoring the running condition of the alternating current system in real time, can meet the detection requirements of the traditional mode on basic parameters such as the switch state, the tripping state, the alternating current, the voltage and the like of the alternating current loop, can display the residual current of each loop and the ambient temperature in real time, can automatically judge whether the loop insulation is abnormal according to monitoring data, gives out audible and visual alarm if the loop insulation is abnormal, and has the smoke alarm function, when the concentration of the ambient smoke exceeds the standard, the system has comprehensive functions, is easy to realize and has high cost performance, and the safety and the reliability of the alternating current system for the station are greatly provided.
The alternating current insulation monitoring device 2 is connected with the precise current transformer 4 and the temperature sensor 5, the alternating current insulation monitoring device 2 monitors residual current and ambient temperature, an alarm instruction is determined according to the residual current and the temperature, and when an input signal reaches alarm setting, an audible and visual alarm is given.
The multifunctional monitoring device 3 is connected with the loop switch, and the multifunctional monitoring device 3 collects basic information such as the state of the loop switch, the tripping state, the alternating current voltage, the current power and the like.
The precise current transformer 4 is internally penetrated with a switch loop outgoing cable, the precise current transformer 4 is used for collecting residual current signals, and the switch loop outgoing cable is connected with a load through the precise current transformer 4.
The intelligent microcomputer monitoring module 1 is connected with the upper computer, the intelligent microcomputer monitoring module 1 is used for collecting residual current monitoring device data, uniformly uploading the device data to the user background upper computer, and communicating with the upper computer through MODBUS protocol or communicating with the upper computer through IEC61850 protocol. In the power cabinet, information such as real-time current monitoring data, historical fault alarm and the like can be directly observed on a display interface.
Example 1:
The intelligent microcomputer monitoring module 1 is connected with an audible and visual alarm by adopting the alternating current insulation monitoring device 2 and the multifunctional monitoring device 3, the intelligent microcomputer monitoring module 1 is connected with the smoke alarm device 6, a plurality of precise current transformers 4 are arranged at a plurality of charge detection points to be detected of the segmented single bus, the precise current transformers 4 are connected with the intelligent microcomputer monitoring module 1, the precise current transformers 4 are connected with the alternating current insulation monitoring device 2 and the multifunctional monitoring device 3, and the alternating current insulation monitoring device 2 is connected with the temperature sensor 5.
The alternating current insulation monitoring device 2 monitors the switch state and the tripping state of an alternating current loop in real time, detects the alternating current and the voltage of the alternating current loop, detects the residual current of a single loop in cooperation with the precision current transformer 4, processes various data through monitoring whether various data are obviously abnormal or not, so as to judge whether the loop insulation is abnormal or not, and if the loop insulation is abnormal, the audible and visual alarm is activated to send out leakage reminding.
The alternating current insulation monitoring device 2 and the temperature sensor 5 jointly monitor the environmental temperature, the alternating current insulation monitoring device 2 mainly monitors the temperature of a bus cable and an alternating current loop, the temperature sensor 5 mainly measures the overall temperature in a cabinet where a system is located, the alternating current insulation monitoring device 2 is set to detect the temperature as T1, the temperature sensor 5 detects the temperature as T2, the range interval of T1-T2 is (15, 25) under the normal working state, according to the real-time monitoring of the temperature of a distribution line and the environmental temperature, and when the temperature exceeds the range and lasts for a period of time, the system executes an alarm instruction.
When the temperature is abnormal, the audible and visual alarm device triggers, the audible and visual alarm device rings and flashes the indicator lamps at intervals at the indicator lamps arranged on the cabinet body to warn, so that workers are reminded of timely overhauling the loop system; when there is a trip in the loop, the T1 temperature will gradually decrease to be level with T2, the system will give a prompt, but not raise an alarm.
If a fire point occurs in the system in the cabinet or the adjacent system, smoke is accumulated along with time, at the moment, the smoke alarm 6 is triggered to give an alarm in time, and the smoke alarm is jointly triggered in parallel with the audible and visual alarm device, so that a worker can process the fire at the first time.
The scheme can monitor the alternating current residual current, the load current, the branch state and the environment state, independently complete the monitoring task, and alarm the possible situations of tripping, abnormal loop insulation, overhigh loop temperature, ignition and the like, which possibly cause potential safety hazards, through the audible and visual alarm device or the smoke alarm 6 so as to be convenient for timely treatment.
Example 2:
The intelligent microcomputer monitoring module 1 is connected with an upper computer, the intelligent microcomputer monitoring module 1 is communicated with the upper computer through a MODBUS protocol or an IEC61850 protocol, the intelligent microcomputer monitoring module 1 is connected with a display, the alternating-current insulation monitoring device 2 and the multifunctional monitoring device 3 are connected with the upper computer through the intelligent microcomputer monitoring module 1, the intelligent microcomputer monitoring module 1 is connected with an audible-visual alarm and a smoke alarm device 6, a plurality of precise current transformers 4 are arranged at a plurality of charge detection points to be detected of a segmented single bus, the precise current transformers 4 are connected with the upper computer through the intelligent microcomputer monitoring module 1, the precise current transformers 4 are connected to the alternating-current insulation monitoring device 2 and the multifunctional monitoring device 3 and transmit current data to the alternating-current insulation monitoring device 2 and the multifunctional monitoring device 3, and the alternating-current insulation monitoring device 2 is connected with the temperature sensor 5.
The intelligent microcomputer monitoring module 1 is connected with the alternating current insulation monitoring device 2 and the multifunctional monitoring device 3 to complete the collection and communication management functions of all data of an alternating current system, and can communicate with a background upper computer through an RJ45 (IEC 61850 protocol) or an RS485 interface (Modbus protocol); the intelligent monitoring system is used for on-site interface display, and can be used for directly monitoring the opening and closing states of all loops in a cabinet, loop voltage, current and power data, historical fault alarm and other important parameter information.
The alternating current insulation monitoring device 2 supports 4-loop or 8-loop configuration, adopts a standard guide rail installation mode, greatly reduces installation space, adopts an RS485 interface, adopts a MODBUS-RTU protocol, has a baud rate settable parameter range of 4800/9600/19200/38400bps, is connected with the precision current transformer 4 and the temperature sensor 5, is used for monitoring a residual current data value and an environment temperature value of a selected loop, determines whether to make a judgment instruction needing to alarm according to the measured residual current and the environment temperature, and sends out an audible and visual alarm when an input signal reaches alarm setting.
When the tested loop has faults of tripping, overvoltage, overcurrent and the like, the multifunctional monitoring device 3 gives an alarm instruction, can select a specific fault branch and displays related information through a display connected with the intelligent microcomputer monitoring module 1.
The switch loop outlet cable needs to pass through the precise current transformer 4 and then is connected with a load, the precise current transformer 4 measures the residual current signal of the selected loop, and the signal is uploaded to the alternating current insulation monitoring device 2. The transformer has a simple structure, the minimum detection residual current value can reach below 5mA, and the precision reaches and is superior to the national standard.
The temperature sensor 5 is used for measuring the ambient temperature of the screen cabinet and uploading signals to the alternating current insulation monitoring device 2, and the sensor is small in size and convenient to install.
When the intelligent monitoring system is used, the precision current transformers 4 collect residual current signals and upload the residual current signals to the alternating current insulation monitoring device 2, the alternating current insulation monitoring device 2 is communicated with an upper computer through the intelligent microcomputer monitoring module 1, the upper computer receives data collected by the precision current transformers 4 and processes the data at a cloud end, load power is calculated, whether insulation damage conditions exist or not is judged in real time, if some charge monitoring points are found to be abnormal, the abnormal points are marked, the abnormal points are communicated and transmitted to the intelligent microcomputer monitoring module 1, and the intelligent microcomputer monitoring module 1 displays abnormal point information through a display so that workers can overhaul in a point-to-point mode.
The temperature sensor 5 and the alternating current insulation monitoring device 2 monitor and upload environmental temperature information to the intelligent microcomputer monitoring module 1 in real time, the intelligent microcomputer monitoring module 1 communicates with an upper computer to transmit data to the upper computer, the cloud terminal gathers the data into a table, a historical temperature interval range is obtained according to the statistical table, whether the actual monitoring temperature is abnormal or not is judged according to the historical temperature interval range, and if the temperature abnormality occurs, the audible and visual alarm device gives out audible and visual alarm under the instruction action of the upper computer and the alternating current insulation monitoring device 2 and records an alarm task to the cloud terminal.
If a fire point appears in the system in the cabinet, smoke is accumulated along with time, at the moment, the smoke alarm 6 triggers and records an alarm task to the cloud end, an alarm is timely sent out, and the smoke alarm is jointly triggered in parallel with the audible and visual alarm device, so that a worker can process the fire at the first time, and the alarm task and abnormal data conditions can be checked through the display.
Through the signal acquisition and uploading of the devices, the system realizes the omnibearing monitoring of the running condition of the loop of the alternating current system, if the loop fails, the first time alarm is given to relevant maintenance personnel so as to solve hidden danger in time, avoid serious economic loss caused by accident expansion and greatly improve the safety and reliability of the alternating current power supply system.
The foregoing has shown and described the basic features, principles, and advantages of the utility model. It should be noted that the present utility model is not limited to the above-described embodiments, but is only limited to a few embodiments, and modifications and additions can be made thereto without departing from the spirit and scope of the utility model.
Claims (7)
1. An ac intelligent on-line monitoring system for an electric power station, comprising: the intelligent microcomputer monitoring system comprises an intelligent microcomputer monitoring module (1) and an alternating current insulation monitoring device (2), wherein the intelligent microcomputer monitoring module (1) is connected with a precise current transformer (4) through the alternating current insulation monitoring device (2) and a multifunctional monitoring device (3), and a plurality of the precise current transformers (4) are arranged at a plurality of charge detection points to be detected of a segmented single bus.
2. The intelligent on-line alternating current monitoring system for the power station according to claim 1, wherein the alternating current insulation monitoring device (2) is connected with a precision current transformer (4) and a temperature sensor (5).
3. An ac intelligent on-line monitoring system for an electric power station according to claim 1, characterized in that the multifunctional monitoring device (3) is connected with a loop switch.
4. The intelligent on-line alternating current monitoring system for the power station according to claim 2, wherein a switching circuit outgoing cable is penetrated into the precision current transformer (4), and the switching circuit outgoing cable is connected with a load through the precision current transformer (4).
5. The alternating current intelligent online monitoring system for the power station according to claim 1, wherein the intelligent microcomputer monitoring module (1) is connected with an upper computer, and the intelligent microcomputer monitoring module (1) is communicated with the upper computer through a MODBUS protocol or an IEC61850 protocol.
6. An ac intelligent on-line monitoring system for an electric power station according to any one of claims 1 to 4, characterized in that the intelligent microcomputer monitoring module (1) is connected with an audible and visual alarm by adopting an ac insulation monitoring device (2) and a multifunctional monitoring device (3), and the intelligent microcomputer monitoring module (1) is connected with a smoke alarm device (6).
7. An ac intelligent on-line monitoring system for an electric power station according to any one of claims 1 to 4, characterized in that the intelligent microcomputer monitoring module (1) is connected with a display.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322836796.1U CN221326651U (en) | 2023-10-23 | 2023-10-23 | Alternating current intelligent on-line monitoring system for power station |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202322836796.1U CN221326651U (en) | 2023-10-23 | 2023-10-23 | Alternating current intelligent on-line monitoring system for power station |
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| CN221326651U true CN221326651U (en) | 2024-07-12 |
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| CN202322836796.1U Active CN221326651U (en) | 2023-10-23 | 2023-10-23 | Alternating current intelligent on-line monitoring system for power station |
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