CN218161926U - Metering control system of low-voltage transformer area - Google Patents
Metering control system of low-voltage transformer area Download PDFInfo
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- CN218161926U CN218161926U CN202222328843.7U CN202222328843U CN218161926U CN 218161926 U CN218161926 U CN 218161926U CN 202222328843 U CN202222328843 U CN 202222328843U CN 218161926 U CN218161926 U CN 218161926U
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Abstract
The application discloses measurement control system in low-voltage transformer district, low-voltage transformer district are connected with a plurality of photovoltaic power generation systems, and photovoltaic power generation system includes photovoltaic module and photovoltaic inverter. The metering control system comprises a main station, a platform area intelligent fusion terminal and at least one three-phase internet of things list. The master station is connected with the intelligent integration terminal of the transformer area and is also connected with the photovoltaic inverter through a transformer of the low-voltage transformer area; the platform area intelligent fusion terminal is connected with the three-phase internet of things list; the three-phase internet of things table is connected with the photovoltaic inverter, and the three-phase internet of things table is also connected with a Bluetooth micro short circuit breaker for switching-on or tripping operation. The metering control system can realize the collection of each electric parameter of the low-voltage transformer area, thereby avoiding the potential safety hazard brought to the operation of a power grid and the line maintenance work because the master control system cannot master the electric energy quality in time.
Description
Technical Field
The application relates to the technical field of power grid equipment, in particular to a metering control system of a low-voltage transformer area.
Background
Along with the national vigorous advocation and popularization of new energy projects, the permeability of the distributed photovoltaic power generation system in a low-voltage platform area is gradually improved, so that the power grid faces various problems such as power quality. To the variety of user type in the low-voltage transformer area, island effect easily appears in main distribution lines, and distribution lines also appears because photovoltaic board lacks the electricity the non-voltage state of distribution lines easily. The existing power distribution system cannot monitor each electric parameter in a transformer area in time, so that a master control system of a power grid cannot effectively master the electric energy quality in time, and huge potential safety hazards are brought to power grid operation and line maintenance work.
SUMMERY OF THE UTILITY MODEL
In view of this, the present application provides a metering control system for a low-voltage transformer area, which is used for collecting electrical parameters of a photovoltaic power generation system in the low-voltage transformer area, so as to avoid potential safety hazards brought to power grid operation and line maintenance work due to the fact that a master control system cannot grasp the quality of electrical energy in time.
In order to achieve the above object, the following solutions are proposed:
the utility model provides a measurement control system in low pressure platform district, the low pressure platform district is connected with a plurality of photovoltaic power generation systems, photovoltaic power generation system includes photovoltaic module and photovoltaic inverter, measurement control system includes main website, platform district intelligent fusion terminal and at least one three-phase thing and allies oneself with the netlist, wherein:
the master station is connected with the intelligent integration terminal of the transformer area and is also connected with the photovoltaic inverter through a transformer of the low-voltage transformer area;
the platform area intelligent fusion terminal is connected with the three-phase internet of things list;
the three-phase internet of things list is connected with the photovoltaic inverter, and the three-phase internet of things list is also connected with a Bluetooth micro breaker for switching-on or tripping operation.
Optionally, the metering control system further includes a communication device and a weather collecting assembly, wherein:
the platform district intelligent fusion terminal respectively with communicator, the meteorological collection subassembly is connected.
Optionally, the weather collecting assembly includes a photoelectric sensor, a wind speed sensor, a positioning unit, and a temperature and humidity sensor.
Optionally, the system further comprises a low-voltage distributed photovoltaic switch, wherein:
the photovoltaic inverter is electrically connected with the low-voltage distributed photovoltaic switch.
Optionally, the photovoltaic power generation system further includes an intelligent circuit breaker, wherein:
and the intelligent circuit breaker is connected with the three-phase internet of things list.
Optionally, the photovoltaic power generation system further includes an anti-islanding protection device, wherein:
the anti-islanding protection device is connected with the intelligent circuit breaker.
Optionally, the anti-islanding protection device includes a main controller and an action protection module, wherein:
the main controller is electrically connected with the action protection module.
Optionally, the action protection module includes a voltage abnormality protection unit, a frequency abnormality protection unit, and a zero sequence voltage protection unit.
Optionally, the anti-islanding protection device further includes an AD sampler and a low-pass filter, where:
the AD sampler is respectively connected with the main controller and the low-pass filter;
the low-pass filter is respectively connected with the current transformer and the voltage transformer and is used for receiving the current signal output by the current transformer and the phenomenon voltage signal output by the voltage transformer.
Optionally, the anti-islanding protection device further includes a display, a relay, an alarm module and a wireless communication module, wherein:
the main controller is respectively connected with the display, the relay, the alarm module and the wireless communication module.
According to the technical scheme, the metering control system of the low-voltage transformer area is disclosed, the low-voltage transformer area is connected with a plurality of photovoltaic power generation systems, and each photovoltaic power generation system comprises a photovoltaic module and a photovoltaic inverter. The metering control system comprises a main station, a platform area intelligent fusion terminal and at least one three-phase internet of things list. The master station is connected with the intelligent integration terminal of the transformer area and is also connected with the photovoltaic inverter through a transformer of the low-voltage transformer area; the platform area intelligent fusion terminal is connected with the three-phase internet of things; the three-phase internet of things table is connected with the photovoltaic inverter, and the three-phase internet of things table is also connected with a Bluetooth micro short circuit breaker for switching-on or tripping operation. The metering control system can realize the acquisition of each electric parameter of the low-voltage transformer area, thereby avoiding the potential safety hazard brought to the operation of a power grid and the line maintenance work because the master control system cannot master the electric energy quality in time.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a block diagram of a metering control system for a low-pressure area according to an embodiment of the present application;
FIG. 2 is a block diagram of another metering control system for a low-pressure area according to an embodiment of the present application;
fig. 3 is a block diagram of an anti-islanding protection device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Examples
The embodiment provides a metering control system of a low-voltage platform area.
The metering control system is applied to a low-voltage distribution room which is connected with a plurality of photovoltaic power generation systems, and the specific structure is shown in figures 1-3. The metering control system comprises a main station 1, a platform area intelligent fusion terminal 5 and at least one three-phase internet of things 64. The main station 1 is in communication connection with the transformer area intelligent fusion terminal 5, is electrically connected with the photovoltaic power generation system through the transformer 2 of the low-voltage transformer area, and is used for power supply work of a corresponding line.
The platform district intelligent fusion terminal 5 is as the core of data acquisition, realizes functions such as collection, photovoltaic management, orderly power consumption. The remote communication with the main station 1 is realized through 4G/5G, the local communication with the three-phase internet of things table 64 is realized through low-voltage power line high-speed carrier communication HPLC, and the communication with the weather collection assembly 67 is realized through 485 data lines.
The photovoltaic power generation system comprises a photovoltaic module 61 and a photovoltaic inverter 62, wherein the photovoltaic module 61 is electrically connected with the photovoltaic inverter 62, the photovoltaic inverter 62 is further in signal connection with the platform intelligent fusion terminal 5 through a three-phase internet of things 64, the three-phase internet of things 64 is configured with an inverter protocol library for protocol conversion, and a Bluetooth micro breaker 63 for closing and tripping operation is connected with the three-phase internet of things 64.
The three-phase internet of things table 64 can perform protocol conversion through an inverter protocol library built in the three-phase internet of things table, and locally performs data acquisition and monitoring on the photovoltaic inverter 62 through 485, so that 1-minute curve data acquisition and storage of the photovoltaic inverter 62 are realized.
According to the method and the system, based on networking communication between the HPLC module and the intelligent platform area fusion terminal 5, the control commands of the main station 1 and the intelligent platform area fusion terminal 5 are forwarded, and rigid and flexible control over the photovoltaic grid-connected switch and the photovoltaic inverter 62 is achieved. The photovoltaic inverter 62 has functions of data acquisition, state monitoring, and the like.
The Bluetooth micro breaker 63 is a behind-meter micro breaker of the three-phase internet of things 64, has the functions of leakage protection, electric quantity monitoring of voltage, current, power and the like, is used for monitoring the running state of a switch, and has the RS-485 communication function and the Bluetooth communication function.
In order to realize diversification of user types in a distribution room, the three-phase internet of things table 64 and the low-voltage distributed photovoltaic switches 4 are used as measurement and control terminals, and the 485 module is expanded in the three-phase internet of things table 64 to collect and monitor data of the photovoltaic inverter 62.
The photovoltaic inverter 62 is electrically connected with the low-voltage distributed photovoltaic switch 4, the low-voltage distributed photovoltaic switch 4 is installed on one side of the photovoltaic inverter 62, signal connection is achieved through the RS485 and the photovoltaic inverter, data such as each electric parameter and electric energy quality are collected in real time, the function of a 1-minute curve data collection built-in protocol converter is supported, and collected data are uploaded to a system controller unit SCU of a main station through HPLC.
The three-phase internet of things list 64 and the low-voltage distributed photovoltaic switch 4 are connected with the intelligent platform area fusion terminal 5 through HPLC, and are used for uploading data such as electric parameters and electric energy quality in real time and downloading control instructions of the intelligent platform area fusion terminal 5.
The three-phase internet of things table 64 is also electrically connected with a photovoltaic cost-controlled circuit breaker 69. The photovoltaic cost-controlled circuit breaker 69 has overvoltage protection, undervoltage protection, open-phase protection, voltage loss protection and automatic switching-on function after the voltage is recovered to be normal. The three-phase internet of things table 64 has control and feedback functions and can be connected with control and feedback interfaces of the three-phase internet of things table.
The photovoltaic power generation system further comprises an intelligent circuit breaker 66 which is connected with the photovoltaic inverter 62, and the intelligent circuit breaker 66 has the functions of minute data acquisition, inverter state monitoring and the like. The intelligent circuit breaker 66 is connected with the three-phase internet of things table 64 and is also connected with an anti-islanding protection device 7.
The photovoltaic module 61 is connected with a communication device 68 and a weather collection module 67, and the weather collection module 67 comprises a photoelectric sensor 674, a wind speed sensor 671, a positioning unit 672 and a temperature and humidity sensor 673. The positioning unit 672 comprises GPS positioning and beidou positioning.
The anti-islanding protection 7 device comprises a main controller 71, wherein the main controller 71 is electrically connected with an action protection module 75, and the action protection module 75 comprises a voltage abnormity protection unit 751, a frequency abnormity protection unit 752 and a zero-sequence voltage protection unit 753, which respectively realize a voltage abnormity protection function, a frequency abnormity protection function or a zero-sequence voltage protection function.
The zero-sequence voltage protection unit 753 includes a zero-sequence voltage comparison circuit for comparing the current converted self-produced zero-sequence voltage with a zero-sequence voltage setting value. The main controller 71 is electrically connected to a display 72, a relay 73, an alarm module 74 and a wireless communication module 76.
The main controller 71 is electrically connected with an AD sampler 77, the AD sampler 77 is connected with a low-pass filter 78, and the low-pass filter 78 comprises a current transformer 781 and a voltage transformer 782; the current transformer 781 and the voltage transformer 782 are used for detecting three-phase voltage and current on the line to be detected and calculating electric energy parameters, such as harmonic data. The AD sampler 77 is used for signal acquisition.
According to the technical scheme, the metering control system of the low-voltage transformer area is provided, the low-voltage transformer area is connected with a plurality of photovoltaic power generation systems, and the photovoltaic power generation systems comprise photovoltaic modules and photovoltaic inverters. The metering control system comprises a main station, a platform area intelligent fusion terminal and at least one three-phase internet of things list. The master station is connected with the intelligent integration terminal of the transformer area and is also connected with the photovoltaic inverter through a transformer of the low-voltage transformer area; the platform area intelligent fusion terminal is connected with the three-phase internet of things list; the three-phase internet of things table is connected with the photovoltaic inverter, and the three-phase internet of things table is also connected with a Bluetooth micro short circuit breaker for switching-on or tripping operation. The metering control system can realize the acquisition of each electric parameter of the low-voltage transformer area, thereby avoiding the potential safety hazard brought to the operation of a power grid and the line maintenance work because the master control system cannot master the electric energy quality in time.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
While preferred embodiments of the present application have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all changes and modifications that fall within the true scope of the embodiments of the present application.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or terminal device that comprises the element.
The technical solutions provided by the present application are introduced in detail, and specific examples are applied in the description to explain the principles and embodiments of the present application, and the descriptions of the above examples are only used to help understanding the method and the core ideas of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. The utility model provides a measurement control system in low pressure platform district, the low pressure platform district is connected with a plurality of photovoltaic power generation systems, photovoltaic power generation system includes photovoltaic module and photovoltaic inverter, its characterized in that, measurement control system includes main website, platform district intelligent fusion terminal and at least one three-phase thing and allies oneself with the netlist, wherein:
the master station is connected with the intelligent integration terminal of the transformer area and is also connected with the photovoltaic inverter through a transformer of the low-voltage transformer area;
the platform area intelligent fusion terminal is connected with the three-phase internet of things list;
the three-phase internet of things list is connected with the photovoltaic inverter, and the three-phase internet of things list is also connected with a Bluetooth micro breaker for switching-on or tripping operation.
2. The metrological control system of claim 1, further comprising a communicator and a weather collection assembly, wherein:
the platform district intelligent fusion terminal respectively with communicator, the meteorological collection subassembly is connected.
3. The metering control system of claim 2 wherein the weather collection assembly includes some or all of a photoelectric sensor, a wind speed sensor, a positioning unit, and a temperature and humidity sensor.
4. The metering control system of claim 1, further comprising a low voltage distributed photovoltaic switch, wherein:
the photovoltaic inverter is electrically connected with the low-voltage distributed photovoltaic switch.
5. The metering control system of claim 1 wherein the photovoltaic power generation system further comprises a smart circuit breaker, wherein:
and the intelligent circuit breaker is connected with the three-phase internet of things list.
6. The metering control system of claim 5 wherein the photovoltaic power generation system further comprises an anti-islanding protection device, wherein:
the anti-islanding protection device is connected with the intelligent circuit breaker.
7. The metering control system of claim 6 wherein the anti-islanding protection device comprises a main controller and an action protection module, wherein:
the main controller is electrically connected with the action protection module.
8. The metering control system of claim 7 wherein the motion protection module comprises a voltage anomaly protection unit, a frequency anomaly protection unit, and a zero sequence voltage protection unit.
9. The metering control system of claim 7 wherein the anti-islanding protection device further comprises an AD sampler and a low pass filter, wherein:
the AD sampler is respectively connected with the main controller and the low-pass filter;
the low-pass filter is respectively connected with the current transformer and the voltage transformer and is used for receiving the current signal output by the current transformer and the phenomenon voltage signal output by the voltage transformer.
10. The metering control system of claim 7 wherein the anti-islanding protection device further comprises a display, a relay, an alarm module, and a wireless communication module, wherein:
the main controller is respectively connected with the display, the relay, the alarm module and the wireless communication module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222328843.7U CN218161926U (en) | 2022-09-01 | 2022-09-01 | Metering control system of low-voltage transformer area |
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| CN202222328843.7U CN218161926U (en) | 2022-09-01 | 2022-09-01 | Metering control system of low-voltage transformer area |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116316860A (en) * | 2023-05-22 | 2023-06-23 | 国网信息通信产业集团有限公司 | Distributed photovoltaic collection control interaction system based on HPLC communication |
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- 2022-09-01 CN CN202222328843.7U patent/CN218161926U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116316860A (en) * | 2023-05-22 | 2023-06-23 | 国网信息通信产业集团有限公司 | Distributed photovoltaic collection control interaction system based on HPLC communication |
| CN116316860B (en) * | 2023-05-22 | 2023-11-03 | 国网信息通信产业集团有限公司 | Distributed photovoltaic collection control interaction system based on HPLC communication |
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