CN219204192U - Feeder terminal with power quality monitoring and governance functions - Google Patents
Feeder terminal with power quality monitoring and governance functions Download PDFInfo
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- CN219204192U CN219204192U CN202223552596.5U CN202223552596U CN219204192U CN 219204192 U CN219204192 U CN 219204192U CN 202223552596 U CN202223552596 U CN 202223552596U CN 219204192 U CN219204192 U CN 219204192U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
The utility model discloses a feeder terminal with power quality monitoring and management functions, which comprises: the device comprises a shell, an FTU core module, a communication module, a power management unit and a backup battery, wherein the FTU core module, the communication module, the power management unit and the backup battery are arranged in the shell; the FTU core module is connected with the communication module; the FTU core module is provided with a telemetry interface, a remote signaling interface, a remote control interface and an electric energy quality monitoring and controlling interface; the first bus and the second bus are respectively connected to a telemetry interface through two voltage transformers, and the detection data are uploaded to an upper computer management system through a communication module; a circuit breaker is connected between the first bus and the second bus; the remote signaling interface and the remote control interface are both used for connecting the circuit breaker; the backup battery is respectively connected with a remote control interface and an electric energy quality monitoring and controlling interface of the FTU core module through the power management unit. The feeder terminal is simple in structure, can monitor the running state of the distribution line on line, and is beneficial to controlling reactive compensation equipment, three-phase unbalance and low-voltage equipment to carry out electric energy quality control.
Description
Technical Field
The utility model relates to the technical field of feeder terminals, in particular to a feeder terminal with power quality monitoring and management functions.
Background
With the rapid development of economy in recent years, electric power has become one of the indispensable energy sources in the social development. In order to solve the problems of automatic coverage of power distribution of incremental equipment and mismatching of secondary equipment in large-scale construction and transformation of a power distribution network, the synchronous management goal of 'four-point' (partition, partial pressure, component and partition) line loss is realized, 10 (20/6) kilovolt synchronous line loss management is solidly advanced, the lean level of line loss management is continuously improved, and the operating benefit of a power supply company is improved;
however, the existing distribution network has complex conditions, such as the conditions of harmonic waves, unbalance, large reactive power and the like of lines of industrial and mining enterprises, and the conditions of low voltage, unbalance and the like of remote mountain areas and the like; the new energy is connected to the power supply to bring over-voltage, low-voltage and other conditions; it is necessary to design and develop a feeder terminal with power quality monitoring and adjusting functions to solve the corresponding problems.
Disclosure of Invention
The utility model aims to provide a feeder terminal with power quality monitoring and management functions, which solves the problems of complex working conditions and unbalanced voltage of the existing power distribution network.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
the utility model provides a feeder terminal with power quality monitoring and management functions, which comprises:
the device comprises a shell, an FTU core module, a communication module, a power management unit and a backup battery, wherein the FTU core module, the communication module, the power management unit and the backup battery are arranged in the shell;
wherein, the FTU core module is connected with the communication module;
the FTU core module is provided with a telemetry interface, a remote signaling interface, a remote control interface and an electric energy quality monitoring and control interface;
the remote measuring interface is used for respectively accessing a first bus and a second bus through two voltage transformers, and uploading detection data to an upper computer management system through the communication module; a circuit breaker is connected between the first bus and the second bus;
the remote signaling interface and the remote control interface are both used for connecting the circuit breaker;
the backup battery is respectively connected with the remote control interface and the electric energy quality monitoring and control interface of the FTU core module through the power management unit.
Further, the communication module is a mobile GPRS module or a 4G communication module.
Further, the FTU core module is an ARM microcontroller stm32f407 chip.
Further, the method further comprises the following steps: the data acquisition module consists of 16 paths of A/D converters; the device is used for connecting field devices in a RS232 serial port, an RS485 serial port and/or micropower wireless mode;
and the ARM microcontroller stm32f407 chip is connected with the data acquisition module through an FMSC bus.
Further, the data acquisition module is an AD7616 sampling chip.
Further, the method further comprises the following steps: the storage module is used for temporarily storing the detection data;
and the ARM microcontroller stm32f407 chip is connected with the storage module through an FMSC bus.
Further, the method further comprises the following steps: the OLED display screen and the keys are arranged on one side of the shell;
and the ARM microcontroller stm32f407 chip is connected with the OLED display screen and the keys through an SPI bus or a GPIO port.
Further, the method further comprises the following steps: a real-time clock module and a temperature and humidity sensor;
and the ARM microcontroller stm32f407 chip is connected with the real-time clock module and the temperature and humidity sensor through IIC buses respectively.
Further, the method further comprises the following steps: an energy storage relay and a relay;
and the ARM microcontroller stm32f407 chip is connected with the energy storage relay and the relay through GPIO ports respectively.
Further, the shell is also provided with an operation plate; the operating panel is provided with a YK opening operation part, a YK closing operation part, a YX 10 operation part and a YK activation starting/stopping operation part.
Compared with the prior art, the utility model has the following beneficial effects:
the feeder terminal with the power quality monitoring and managing functions provided by the embodiment of the utility model comprises: the device comprises a shell, an FTU core module, a communication module, a power management unit and a backup battery, wherein the FTU core module, the communication module, the power management unit and the backup battery are arranged in the shell; wherein, the FTU core module is connected with the communication module; the FTU core module is provided with a telemetry interface, a remote signaling interface, a remote control interface and an electric energy quality monitoring and control interface; the remote measuring interface is used for respectively accessing a first bus and a second bus through two voltage transformers, and uploading detection data to an upper computer management system through the communication module; a circuit breaker is connected between the first bus and the second bus; the remote signaling interface and the remote control interface are both used for connecting the circuit breaker; the backup battery is respectively connected with the remote control interface and the electric energy quality monitoring and control interface of the FTU core module through the power management unit. The feeder terminal has a simple structure, can be used for forming a whole set of monitoring control 10kV line device, is used in combination with a distribution network monitoring management terminal through a private network communication system, can monitor the running state of a distribution line on line, and is beneficial to controlling reactive power compensation equipment, three-phase unbalance and low-voltage equipment to carry out electric energy quality control.
Drawings
Fig. 1 is a schematic diagram of a feeder terminal provided in an embodiment of the present utility model in a monitoring state;
fig. 2 is a block diagram of a feeder terminal according to an embodiment of the present utility model.
Detailed Description
The utility model is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The distribution network automation feeder terminal is an intelligent terminal which is designed for distribution network intellectualization, mainly completes the functions of local monitoring, control and fault detection of the switch equipment, achieves fault detection through analysis and judgment of line data, and rapidly positions faults so as to realize rapid isolation of fault areas and recovery of power supply of non-fault areas, and effectively improves the reliability of power supply. Besides the safety and stability of the power grid, the power grid company itself guarantees relevant hardware, and the on-line monitoring of the power quality is also very necessary. The feeder terminal integrates the functions of line loss analysis, harmonic analysis, flicker measurement, power measurement, unbalance measurement, fault wave recording, event recording and the like, can control the functions of reactive compensation, voltage regulation, three-phase unbalance treatment and the like, records steady-state data and transient data, and deep mines the cause of each fault and event, thereby better analyzing the data and cooperatively controlling the more efficient and stable operation of a power grid.
Referring to fig. 1-2, the feeder terminal with power quality monitoring and management functions provided by the present utility model includes: the device comprises a shell, an FTU core module, a communication module, a power management unit and a backup battery, wherein the FTU core module, the communication module, the power management unit and the backup battery are arranged in the shell; the FTU core module is connected with the communication module;
the FTU core module is provided with a telemetry interface, a remote signaling interface, a remote control interface and an electric energy quality monitoring and controlling interface; the telemetering interface is used for respectively accessing a first bus and a second bus through two voltage transformers and uploading detection data to the upper computer management system through the communication module; a circuit breaker is connected between the first bus and the second bus; the remote signaling interface and the remote control interface are both used for connecting the circuit breaker; the backup battery is respectively connected with a remote control interface and an electric energy quality monitoring and controlling interface of the FTU core module through the power management unit.
The power management unit has the intelligent charge and discharge management function and the battery activation management function for the external lead-acid battery and the lithium battery, can effectively prevent overcharge, overdischarge and passivation of the battery, and also has a remote control activation node connected with the controller unit, and the remote battery output turn-off node and the alternating current power failure, battery under-voltage, battery activation state, power failure and other signal output nodes are convenient for realizing intelligent effective management of the power supply of the whole terminal system.
In fig. 1, a whole set of monitoring and controlling 10kV line device is formed by a voltage and current sensor in a ZW32 breaker, a PT and the FTU feeder terminal, and the running state of a distribution line can be monitored on line by combining a private network communication system with a distribution network monitoring and managing terminal. The feeder terminal has a simple structure, for example, a mobile GPRS/APN or 4G/APN communication private network is adopted to upload detection data to a management system, so that monitoring, metering, protection, fault positioning and isolation of a distribution operation line are realized. Meanwhile, line loss and line loss of the line are analyzed, and harmonic analysis, flicker measurement, power measurement, unbalance measurement and the like are carried out; meanwhile, reactive compensation equipment, three-phase unbalance and low-voltage equipment can be controlled to carry out electric energy quality control.
The feeder terminal is mainly used for collecting signals or electromagnetic signals of the secondary side electronic transformer of the 10kV switch, detecting and monitoring voltage and current of the 10kV line, realizing automatic monitoring, fault analysis, judgment and recording of the line state according to the cooperation of actual conditions and the on-pole switch, integrating measurement, protection, communication and remote control, having the functions of remote signaling, remote sensing, remote control and feeder automation, realizing the functions of fault judgment, fault positioning, fault isolation, line fault cutting, automatic line operation restoration, electric energy quality monitoring and treatment and the like of the medium-low voltage overhead line.
The feeder terminal can adapt to protection logic such as a main line, a branch line, a user demarcation line and the like through configuration, and can timely upload running states, fault information and the like to a main station through standard specifications (101/104) so as to realize an area type comprehensive power distribution automation scheme.
As shown in fig. 2, the FTU core module of the feeder terminal is an ARM microcontroller stm32f407 chip, and mainly performs functions of relay protection, control, measurement, human-computer interface, communication and the like. The core main board comprises PT sampling, CT sampling, a plurality of connecting terminals, a power supply conversion circuit, an AD sampling circuit, an external watchdog circuit, an encryption circuit, a serial port circuit, a direct current quantity monitoring circuit, a real-time clock circuit, a network communication circuit and a plurality of interface circuits. The above circuits are all related in the prior art, and are not innovative in the present utility model and are not described in detail herein.
The data acquisition module in fig. 2 is composed of 16 paths of A/D converters; the communication modes such as an RS232 serial port, an RS485 serial port, a micro-power wireless and the like are used for connecting the field devices such as PLC, OPC, an environment sensor, an instrument and the like, and data can be transmitted to a remote server through protocols such as MQTT, HTTP and the like in the modes such as Ethernet, GPRS, 3G, 4G and the like, so that the functions such as data monitoring, local logic control, remote upgrading and fault alarming are completed. The ARM microcontroller stm32f407 chip is connected with the data acquisition module through an FMSC bus. The data acquisition module is an AD7616 sampling chip.
A memory module (SRAM, NAND) for temporarily storing the detection data; ARM microcontroller stm32f407 chip is connected with the memory module through FMSC bus
The OLED display screen and the keys are arranged on one side of the shell; and the ARM microcontroller stm32f407 chip is connected with the OLED display screen and the keys through an SPI bus or a GPIO port.
A real-time clock module and a temperature and humidity sensor; ARM microcontroller stm32f407 chip is connected with real-time clock module and temperature and humidity sensor through IIC bus respectively.
An energy storage relay and a relay; ARM microcontroller stm32f407 chip is connected with energy storage relay and relay through GPIO mouth respectively.
The shell is also provided with an operation plate; the control panel is provided with a YK opening operation part which is used for opening the ZW32 breaker when a fault signal or manual control is detected;
the YK switching-on operation part is used for performing switching-on operation on the ZW32 breaker when fault signal recovery or manual control is detected; the YX 10 operation part is used for detecting signal monitoring such as a switching-off state, a switching-on state, an energy storage state, a battery signal state of the FTU, a remote on-site state, a protection switching-on and switching-off state, an equipment opening and closing state and the like of the ZW32 circuit breaker;
the YK activation start/stop operation section is used for performing an activation operation on the backup power supply when the backup power supply is not used for a long time, and performing an activation stopping operation after the activation is completed.
Specifically, the main functional modules of the feeder terminal comprise a CPU core processing module, a power management module, a YK activation start/stop part (a telemetry interface, a remote signaling interface and a remote control interface), a line loss processing unit, a man-machine interface module, a network port communication module, an encryption chip module, a wireless communication module, an RTC real-time clock module and a temperature and humidity sensor.
The power management module converts the 2-path AC220V signal provided by the external PT voltage transformer into a 1-path AC220V power supply through the two-path automatic switching module, and the power supply is provided for the input of the power management module, and the output of the power supply is provided for all power supply parts, an energy storage motor, battery charging and the like to supply power.
The telemetering part acquires the analog small signal of the voltage and current sensor, the power supply PT and the capacitor battery voltage, inputs the analog small signal, the power supply PT and the capacitor battery voltage into the AD7616 after partial pressure isolation, samples the analog small signal according to the sampling frequency and uploads the analog small signal to the STM32F407 through the FMSC bus.
The CPU core processing module mainly adopts STM32F407, and is communicated with the SRAM and the NAND through an FMSC bus, wherein the SRAM is used for storing real-time data and cache data, and the NAND is used for storing data such as files and wave recording.
The line loss processing unit directly sends the acquired data to the CPU, and the CPU judges a relay for controlling a line through the data to adjust and treat the electric energy quality such as voltage regulator adjustment or reactive power adjustment.
The CPU activates and starts/stops through YK of the GPIO control circuit to control the backup power supply, and when the power supply is not used for a long time, the backup power supply is activated and started or stopped, so that the backup power supply is vulcanized again, and the service life of the backup power supply is prolonged.
The method comprises the steps that a breaking signal, a closing signal and an energy storage signal of a breaker are fed back to a CPU (central processing unit) through a GPIO (general purpose input/output) by a remote on-site signal and a protection switching signal of an FTU (fiber to the U) device, the CPU estimates YK (YK) operation of a feedback signal control circuit, the breaker is controlled to be subjected to breaking operation and closing operation, activation or stopping operation of a battery is controlled remotely, and running and opening and closing of a fault indicator lamp are controlled;
and the OLED display screen is additionally provided with 6 keys and is used for browsing and setting equipment information through man-machine interaction.
The network port 1 and the network port 2 are used for external communication through network cables, and can also be connected with GPRS for 4G or 5G communication.
4 paths of 232 serial ports are reserved, and communication can be performed by a wireless module, external 232 equipment or other external equipment.
The wireless communication module communicates with a remote master station in a GPRS mode.
The encryption chip meets the communication security upgrading requirement of a distribution Feeder Terminal (FTU), supports the functions of data standardization analysis and encapsulation, communication service control management, bidirectional identity authentication, data encryption protection, terminal certificate management and the like, can realize the data between the terminal and a master station, and meets the standard communication protocol (101/104) and the information security protection requirement of a national network distribution automation system.
The RTC clock is communicated with the CPU through the IIC interface, so that the time setting error of the Beidou/GPS mode can be ensured to be not more than 5ms; receiving and executing a time setting command issued by a main station, wherein the time setting error of the optical fiber channel is not more than 1s; the time keeping accuracy should be less than 2s every 24 hours.
The temperature and humidity sensor is communicated with the CPU through the IIC interface, so that the temperature and humidity of the environment beside the FTU equipment can be monitored, reliable environment data can be provided for the device in real time, and stable, safe and reliable operation of the device is ensured.
The feeder terminal provided by the utility model has a simple structure, can be used for forming a whole set of monitoring and controlling 10kV line device, can be used in combination with a distribution network monitoring and managing terminal through a private network communication system, can monitor the running state of a distribution line on line, and is beneficial to controlling reactive power compensation equipment, three-phase imbalance and low-voltage equipment to carry out electric energy quality control.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
1. A feeder terminal having power quality monitoring and remediation functions, comprising: the device comprises a shell, an FTU core module, a communication module, a power management unit and a backup battery, wherein the FTU core module, the communication module, the power management unit and the backup battery are arranged in the shell;
wherein, the FTU core module is connected with the communication module;
the FTU core module is provided with a telemetry interface, a remote signaling interface, a remote control interface and an electric energy quality monitoring and control interface;
the remote measuring interface is used for respectively accessing a first bus and a second bus through two voltage transformers, and uploading detection data to an upper computer management system through the communication module; a circuit breaker is connected between the first bus and the second bus;
the remote signaling interface and the remote control interface are both used for connecting the circuit breaker;
the backup battery is respectively connected with the remote control interface and the electric energy quality monitoring and control interface of the FTU core module through the power management unit.
2. A feeder terminal with power quality monitoring and management functions according to claim 1, characterized in that the communication module is a mobile GPRS module or a 4G communication module.
3. The feeder terminal with power quality monitoring and remediation function according to claim 1, wherein the FTU core module is an ARM microcontroller stm32f407 chip.
4. A feeder terminal with power quality monitoring and remediation function according to claim 3 further comprising: the data acquisition module consists of 16 paths of A/D converters; the device is used for connecting field devices in a RS232 serial port, an RS485 serial port and/or micropower wireless mode;
and the ARM microcontroller stm32f407 chip is connected with the data acquisition module through an FMSC bus.
5. The feeder terminal with power quality monitoring and governance function according to claim 4, wherein said data acquisition module is an AD7616 sampling chip.
6. A feeder terminal with power quality monitoring and remediation function according to claim 3 further comprising: the storage module is used for temporarily storing the detection data; and the ARM microcontroller stm32f407 chip is connected with the storage module through an FMSC bus.
7. A feeder terminal with power quality monitoring and remediation function according to claim 3 further comprising: the OLED display screen and the keys are arranged on one side of the shell;
and the ARM microcontroller stm32f407 chip is connected with the OLED display screen and the keys through an SPI bus or a GPIO port.
8. A feeder terminal with power quality monitoring and remediation function according to claim 3 further comprising: a real-time clock module and a temperature and humidity sensor;
and the ARM microcontroller stm32f407 chip is connected with the real-time clock module and the temperature and humidity sensor through IIC buses respectively.
9. A feeder terminal with power quality monitoring and remediation function according to claim 3 further comprising: an energy storage relay and a relay;
and the ARM microcontroller stm32f407 chip is connected with the energy storage relay and the relay through GPIO ports respectively.
10. A feeder terminal with power quality monitoring and remediation function according to claim 3 wherein the housing also has an operating panel thereon; the operating panel is provided with a YK opening operation part, a YK closing operation part, a YX 10 operation part and a YK activation starting/stopping operation part.
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| CN202223552596.5U CN219204192U (en) | 2022-12-29 | 2022-12-29 | Feeder terminal with power quality monitoring and governance functions |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119891439A (en) * | 2024-12-31 | 2025-04-25 | 云谷技术(珠海)有限公司 | FTU integrated backup power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119891439A (en) * | 2024-12-31 | 2025-04-25 | 云谷技术(珠海)有限公司 | FTU integrated backup power supply |
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