CN216774299U - Low-voltage switch reactive power compensation cabinet based on Internet of things - Google Patents
Low-voltage switch reactive power compensation cabinet based on Internet of things Download PDFInfo
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- CN216774299U CN216774299U CN202220409198.9U CN202220409198U CN216774299U CN 216774299 U CN216774299 U CN 216774299U CN 202220409198 U CN202220409198 U CN 202220409198U CN 216774299 U CN216774299 U CN 216774299U
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Abstract
The utility model discloses a low-voltage switch reactive power compensation cabinet based on the Internet of things, which comprises a cabinet body; the cabinet body comprises a first inlet wire connected with a main bus of the inlet wire cabinet, a first breaker connected with the first inlet wire, an SVG unit connected with the first breaker, and a first measurement and control unit for measuring a connecting wire between the first breaker and the SVG unit; the SVG unit comprises an inductor connected with a first circuit breaker, an IGBT connected with the inductor and a support capacitor connected with the IGBT; a reactive cabinet communication interface connected with the communication unit of the incoming line cabinet is arranged on the first measurement and control unit; the communication unit is used for transmitting the measurement result obtained by the first measurement and control unit to a network end; and a dynamic configuration diagram of the reactive power compensation cabinet is displayed on a human-computer interface of the incoming line cabinet, and the dynamic configuration diagram of the reactive power compensation cabinet displays an electrical schematic diagram and a real-time working state of the reactive power compensation cabinet in a dynamic diagram form.
Description
Technical Field
The disclosed embodiments relate generally to the field of low-voltage power distribution, and more particularly, to an internet of things-based low-voltage switch reactive power compensation cabinet.
Background
A common low-voltage Power distribution switch system generally includes an incoming line cabinet (also called a Power receiving cabinet, for receiving Power from a Power grid), an outgoing line cabinet (also called a feed cabinet or a Power distribution cabinet, for distributing Power), a capacitance compensation cabinet (also called a capacitor cabinet, a compensation cabinet, for improving Power factor), a reactive compensation cabinet (also called an SVG cabinet, i.e., a static var generator, SVG for short, for improving Power factor), an Active Filter cabinet (also called an APF cabinet, an Active Power Filter, APF for short, for filtering), and a bus coupler cabinet (also called a coupler cabinet, a bus bar breaking cabinet, for connecting two segments of buses).
In the widely used low-voltage distribution switch system at present, each cabinet (especially a reactive compensation cabinet) has no network internet of things capability, so that the data collection and transmission capability is poor, a large amount of power distribution operation data is not collected and uploaded, the operation guarantee and the daily management means are backward, and the intellectualization cannot be realized. For example, the current cabinet often uses the panel instrument to show a small amount of random data, can't grasp the operational data of the cabinet comprehensively, and because data collection and transmission ability are poor, produce higher operational risk easily, consequently need 24 hours manual watch, regularly observe to monitor through manual meter reading record, do not have the intensification management condition, human-computer interaction is also very inconvenient directly perceived.
In addition, each cabinet (especially a reactive compensation cabinet) in the existing low-voltage distribution switch system has poor performance in the aspect of human-computer interaction capability, cannot comprehensively know the operation condition of each cabinet in real time, and easily causes key data loss, so that the safe operation is not guaranteed. Once a fault and an accident occur, the existing cabinet body needs to be manually judged and checked, so that the fault diagnosis time is long, and the influence on the use of a user is large. In addition, the existing low-voltage distribution electric switch system is lack of the capability of the internet of things, so that historical data in the operation process cannot be collected, stored and transmitted, the positioning of events and accident recall after faults occur are very difficult, and good traceability and analysis improvement capability are lacked.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide a low-voltage switch reactive power compensation cabinet based on the internet of things, so as to solve at least one of the above problems and other potential problems in the prior art.
In order to achieve the purpose, the utility model provides a low-voltage switch reactive power compensation cabinet based on the Internet of things, which comprises a cabinet body; the cabinet body comprises a first incoming line connected with a main bus of the incoming line cabinet, a first circuit breaker connected with the first incoming line, an SVG unit connected with the first circuit breaker, and a first measurement and control unit used for measuring a connecting line between the first circuit breaker and the SVG unit; the SVG unit comprises an inductor connected with the first circuit breaker, an IGBT connected with the inductor and a support capacitor connected with the IGBT; a reactive cabinet communication interface connected with the communication unit of the incoming line cabinet is arranged on the first measurement and control unit; the communication unit is used for transmitting the measurement result obtained by the first measurement and control unit to a network end; and a dynamic configuration diagram of the reactive power compensation cabinet is displayed on a human-computer interface of the incoming line cabinet, and the dynamic configuration diagram of the reactive power compensation cabinet shows an electrical schematic diagram and a real-time working state of the reactive power compensation cabinet in a dynamic diagram form.
According to the embodiment of the utility model, the electrical schematic diagram of the reactive compensation cabinet shows the switch state of the first circuit breaker by different colors; the real-time working state of the reactive compensation cabinet comprises at least one of the following items: split-phase current, active power and temperature in the cabinet.
According to an embodiment of the utility model, the switching states of the first circuit breaker include a closed state, indicated by red, and an open state, indicated by green.
According to an embodiment of the utility model, the first measurement and control unit comprises at least one of: the first current measurement loop measures the current of the connecting line by adopting a current transformer; a first voltage measurement circuit interconnected with the connection line via a fuse for measuring a voltage; and the first temperature measurement loop adopts a temperature sensor to measure the temperature of the connecting wire.
According to an embodiment of the present invention, the first measurement and control unit further comprises a controller, the controller comprising at least one of: the cabinet body state monitoring unit is used for monitoring at least one of working parameters, energy consumption states and switch states of the pipe control nodes in the cabinet body; the load state monitoring unit is used for monitoring at least one of working parameters, energy consumption states and switch states of the load; the electric fire monitoring unit is used for monitoring residual current and temperature measurement in the cabinet body and giving an open circuit or short circuit alarm when fire hazards exist; the power parameter monitoring unit is used for monitoring at least one of split-phase voltage, combined-phase voltage, split-phase current, combined-phase current, zero line current, split-phase active power, combined-phase active power, split-phase reactive power, combined-phase reactive power, split-phase apparent power and combined-phase apparent power in the cabinet body; the electric energy metering and monitoring unit is used for monitoring at least one of split-phase active electric energy, combined-phase active electric energy, split-phase reactive electric energy and combined-phase reactive electric energy in the cabinet body; a power quality monitoring unit; the phase-splitting power factor monitoring device is used for monitoring at least one of phase-splitting power factor, phase-combining power factor, phase-splitting harmonic current and phase-combining harmonic current in the cabinet body.
According to the embodiment of the utility model, the incoming line cabinet comprises a second incoming line for receiving the input of a low-voltage power supply, a second breaker connected with the second incoming line, a main bus connected with the second breaker, a second measurement and control unit for measuring the main bus, a communication unit for transmitting the measurement result obtained by the second measurement and control unit to the network end, and a human-computer interface for interacting with an operator; one end of the second breaker is connected with the second incoming line, and the other end of the second breaker is connected with the main bus.
According to the embodiment of the utility model, the communication unit is connected with the incoming line cabinet communication interface of the second measurement and control unit through an RS485 interface, and the second measurement and control unit receives a control signal which comes from the network end and is transmitted through the communication unit.
According to an embodiment of the utility model, the control signal comprises a signal controlling a switching state of the second circuit breaker; the communication unit is connected with the human-computer interface through an RS232 data interface and is communicated with a network switch, a gateway and the Internet of the network end through an Ethernet interface.
According to an embodiment of the utility model, the human-machine interface is further capable of displaying at least one of the following of the reactive compensation cabinet: split-phase voltage, split-phase current, zero line current, split-phase active power, split-phase reactive power, split-phase apparent power, split-phase active electric energy, split-phase reactive electric energy, split-phase power factor, frequency, cabinet temperature, phasor diagram, split-phase harmonic current, fundamental current, 3-31 harmonic current split-phase histogram.
According to an embodiment of the present invention, the network further comprises a server, which includes at least one of the following: an online data display unit which displays at least one of the following data of the reactive compensation cabinet: split-phase voltage, split-phase current, zero line current, split-phase active power, split-phase reactive power, split-phase apparent power, split-phase active electric energy, split-phase reactive electric energy, split-phase power factor, frequency, cabinet temperature, phasor diagram, split-phase harmonic current, fundamental current, 3-31 th harmonic current split-phase histogram; the online dynamic configuration diagram display unit is used for displaying an electrical schematic diagram and a real-time working state of the reactive compensation cabinet in a dynamic diagram form; an online carbon emission statistical unit for counting and displaying at least one of the following items in the area where the reactive compensation cabinet is applied: peak flat valley electric quantity proportion condition, energy consumption statistic condition, item energy consumption condition and classified energy consumption proportion condition; an online energy flow graph presentation unit that presents at least one of the following in an energy flow graph form: energy flow direction, node power supply data, load energy consumption data, power transformation loss data and transmission loss data.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a low-voltage power distribution switch system based on the internet of things according to an embodiment of the utility model.
Fig. 2 is a schematic diagram (in the form of a single-line diagram) of a partial electrical structure of the reactive power compensation cabinet according to the embodiment of the present invention.
Fig. 3 is a schematic diagram (in the form of a circuit diagram) of a partial electrical structure of the reactive power compensation cabinet according to the embodiment of the present invention.
Fig. 4 is a dynamic configuration diagram of the inlet cabinet and a dynamic configuration diagram of the reactive cabinet of the human-computer interface in the inlet cabinet according to the embodiment of the present invention.
Fig. 5 is a schematic diagram (in the form of a single-line diagram) of a partial electrical structure of the inlet cabinet according to the embodiment of the present invention.
Fig. 6 is a schematic electrical structural diagram (in the form of a circuit diagram) of a portion of the inlet cabinet according to the embodiment of the present invention.
Fig. 7 is a schematic diagram (in the form of a circuit diagram) of a partial electrical structure of the inlet cabinet according to the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person skilled in the art without any inventive work based on the embodiments of the present invention belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the precedence of the technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified. In the description of the present invention, unless explicitly defined otherwise, the terms "connect", "connecting", and the like are to be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the above terms in the present invention according to the specific content of the technical solutions, for example, the "connect" may be an electrical connection, or a circuit connection; may be directly connected or indirectly connected through an intermediate. The term "include" and variations thereof as used herein are open-ended, i.e., "including but not limited to". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment". Relevant definitions for other terms will be given in the following description.
As shown in fig. 1 to 7, an embodiment of the present invention provides an internet of things-based low-voltage power distribution switch system (which may also be referred to as an internet of things-based low-voltage switchgear assembly and an internet of things-based low-voltage switchgear assembly), which includes an incoming line cabinet 100 (also referred to as a powered cabinet and a power incoming line cabinet, which are used for receiving electric energy from a power grid, as shown by a dashed box in fig. 5), an outgoing line cabinet 200 (also referred to as a feeding cabinet or a power distribution cabinet, which is used for distributing electric energy), a capacitance compensation cabinet 300, a reactive compensation cabinet 400 (as shown by a dashed box in fig. 2), an active filter cabinet 500, and a bus coupler cabinet 600.
It will be appreciated that by the structure of the inlet box 100, the incoming low voltage electricity (typically 220V or 380V obtained after 10KV in the grid is stepped down by a transformer) can be distributed to, for example, loads or loads (such as various loads or loads for domestic or industrial use). For another example, the incoming cabinet 100, the outgoing cabinet 200, the reactive compensation cabinet 400, and the like in the low-voltage distribution switch system may all be in the form of a draw-out low-voltage switch cabinet (the outgoing cabinet may be in a drawer type), and the use and maintenance are more convenient.
As shown in fig. 2 to 7, a reactive power compensation cabinet 400 (also called an SVG cabinet, i.e. static var generator, SVG for short) includes a first incoming line 401 connected to a main bus 103 of an incoming line cabinet 100, a first breaker 402 connected to the first incoming line 401, an SVG unit 403 connected to the first breaker 402, and a first measurement and control unit 405 for measuring a connection line 404 between the first breaker 402 and the SVG unit 403.
The SVG unit 403 includes an inductor 4031 connected to the first circuit breaker 402, an IGBT 4032 (Insulated Gate Bipolar Transistor) connected to the inductor 4031, and a support capacitor 4033 connected to the IGBT (for example, the support capacitor may be connected in parallel to a dc terminal of the IGBT, and an ac terminal of the IGBT is connected to the main bus 103).
The first measurement and control unit 405 is provided with a reactive power cabinet communication interface 4051 connected to the communication unit 106 of the inlet cabinet 100 (that is, the reactive power compensation cabinet 400 and the inlet cabinet 100 may share one communication unit, so that the overall structure is simple and efficient, and the cost is lower). The communication unit is configured to transmit the measurement result obtained by the first measurement and control unit to the network terminal 105.
It can be understood that, in the present invention, the first measurement and control unit 405 is disposed in the reactive power compensation cabinet 400, and the measurement result obtained by the first measurement and control unit can be transmitted to the network terminal 105 through the communication unit 106 of the incoming line cabinet 100, so that the reactive power compensation cabinet has the capability of internet of things, and can acquire various data (for example, a large amount of data such as current, voltage, and temperature) in the cabinet body in real time, and upload the data to the network terminal 105 through the network (to implement functions such as storage and analysis), thereby implementing a low voltage switch reactive power compensation cabinet based on internet of things. Therefore, local unattended operation or unattended operation of the distribution rooms can be achieved, and the distribution rooms can be subjected to intensive network monitoring, so that the working intensity is reduced, the working efficiency is improved (intensive management conditions are achieved), and the operation cost is reduced. When the operation is abnormal, the alarm can be rapidly sent out, the fault can be rapidly positioned, the loss is prevented from being enlarged, and the original data tracing is provided for event processing. And because a large amount of historical data and real-time data can be uploaded and stored, the analysis can be carried out in real time, and powerful support can be provided for fault diagnosis and improvement perfection of the whole power distribution system. In addition, the low-voltage switch reactive power compensation cabinet based on the Internet of things can be linked with video equipment to synchronously record video screenshots of the operation of each control node in the power distribution process, so that the record of an operation image can be provided.
According to an embodiment of the present invention, the dynamic configuration diagram 111 of the reactive power compensation cabinet is displayed on the human-computer interface of the incoming line cabinet (as shown in fig. 4, that is, the dynamic configuration diagram of the reactive power compensation cabinet is displayed on the incoming line cabinet 100, which is convenient for integration and viewing and has lower cost), and the dynamic configuration diagram of the reactive power compensation cabinet shows the electrical schematic diagram and the real-time working state of the reactive power compensation cabinet in a dynamic diagram form. In addition, the bus coupler cabinet dynamic configuration diagram 112 of the bus coupler cabinet 600 is also displayed on the human-machine interface of the incoming line cabinet (as shown in fig. 4, that is, the bus coupler cabinet dynamic configuration diagram is displayed on the incoming line cabinet 100, so that the integration and the viewing are convenient and the cost is lower).
According to the embodiment of the utility model, the electrical schematic diagram of the reactive compensation cabinet shows the switch state of the first circuit breaker by different colors; the real-time working state of the reactive compensation cabinet comprises at least one of the following items: split-phase current, active power and temperature in the cabinet. According to an embodiment of the utility model, the switching states of the first circuit breaker include a closed state, indicated by red, and an open state, indicated by green.
It can be understood that the electric schematic diagram and the real-time working state of the reactive power compensation cabinet are displayed in an innovative way by using the dynamic configuration diagram of the reactive power cabinet, so that monitoring is not needed through manual meter reading records, and man-machine interaction is very convenient and intuitive, so that the performance of the reactive power compensation cabinet in the low-voltage distribution electric switch system is greatly improved in the aspect of man-machine interaction capacity, the running condition of the reactive power compensation cabinet can be comprehensively known in real time, and safe running is guaranteed. Once a fault and an accident occur, the judgment can be intuitively carried out, so that the fault diagnosis time is short, and the influence on the normal use of a user is small.
According to an embodiment of the present invention, the first measurement and control unit of the reactive compensation cabinet 400 includes at least one of the following: a first current measurement circuit 4052, a first voltage measurement circuit 4053, and a first temperature measurement circuit 4054. The first current measurement circuit 4052 measures the current of the connection line 404 by using a current transformer; a first voltage measurement circuit 4053 is interconnected with the connection line 404 via a fuse for measuring a voltage; the first temperature measurement circuit 4054 measures the temperature of the connection 404 using a temperature sensor.
As an example, the SVG cabinet 400 is a node that governs the power factor of the power inlet line of the low-voltage switchgear assembly, and can be used in place of the capacitance compensation cabinet 300. The upper port of the first breaker 402 is connected to the main bus 103, and the lower port is connected to the SVG unit 403. The SVG unit 403 may control the reactive power generation amount according to the collected voltage of the main bus 103 and the load current collected through the current transformer of the main bus 103, thereby implementing control of the power factor of the incoming line power. The data of the SVG cabinet 400 may be measured by the first measurement and control unit 405.
For example, the current of the SVG cabinet 400 may be collected by a current transformer at the lower port of the first circuit breaker 402 and transmitted to the first measurement and control unit 405. The voltage of the SVG cabinet 400 can collect the lower port voltage of the first circuit breaker 402 and is transmitted to the first measurement and control unit 405 through the fuse. The temperature of the first circuit breaker 402 may be collected by a temperature sensor (e.g., a digital temperature sensor) and communicated to the first measurement and control unit 405. The switching state of the first circuit breaker 402 can collect an auxiliary contact signal of the circuit breaker and transmit the auxiliary contact signal to the first measurement and control unit 405. The first circuit breaker 402 may be controlled by a first measurement and control unit 405. The first measurement and control unit 405 may transmit a control signal to a circuit breaker control contact of the first circuit breaker 402, so that the first circuit breaker 402 of the SVG cabinet is managed and controlled by the first measurement and control unit 405. The first measurement and control unit 405 may be connected to the network and human-machine interface 107 through the communication unit 106 of the inlet cabinet 100 after completing data collection and/or conversion, so as to implement network management and control and direct observation and control management of the SVG cabinet by using the human-machine interface of the inlet cabinet 100.
According to an embodiment of the utility model, the first measurement and control unit further comprises a controller (not shown) comprising at least one of: the cabinet body state monitoring unit is used for monitoring at least one of working parameters, energy consumption states and switch states of the pipe control nodes in the cabinet body; the load state monitoring unit is used for monitoring at least one of working parameters, energy consumption states and switch states of the load; the electric fire monitoring unit is used for monitoring residual current and temperature measurement in the cabinet body and giving an open circuit or short circuit alarm when fire hazards exist; the power parameter monitoring unit is used for monitoring at least one of split-phase voltage, combined-phase voltage, split-phase current, combined-phase current, zero line current, split-phase active power, combined-phase active power, split-phase reactive power, combined-phase reactive power, split-phase apparent power and combined-phase apparent power in the cabinet body; the electric energy metering and monitoring unit is used for monitoring at least one of split-phase active electric energy, combined-phase active electric energy, split-phase reactive electric energy and combined-phase reactive electric energy in the cabinet body; a power quality monitoring unit; the phase-splitting power factor monitoring device is used for monitoring at least one of phase-splitting power factor, phase-combining power factor, phase-splitting harmonic current and phase-combining harmonic current in the cabinet body.
It can be understood that, through the controller in the first measurement and control unit, can realize the information acquisition and the control of local monitoring node (for example, monitor nodes such as current transformer, fuse, temperature sensor in the inlet wire cabinet), for example, can monitor information such as cabinet body state, load condition, electric fire hidden danger, electric power parameter, electric energy measurement, electric energy quality, realize the localized collection and the processing of a large amount of data, and when needs are controlled or managed and controlled, directly move, thereby guarantee distribution system's whole safety, its thing networking ability has also been strengthened simultaneously.
As shown in fig. 5-7, the inlet box 100 includes a second inlet 101 for receiving a low voltage power input (the low voltage power input may be obtained by transforming a high voltage power input 1000 by a transformer 2000, for example, a voltage of 220V or 380V is obtained by stepping down a high voltage of 10KV by the transformer 2000), a second breaker 102 connected to the second inlet 101 (the detailed structure of the second breaker 102 is shown in the upper right of fig. 3, which is a diagram of an electrical diagram), a main bus 103 connected to the second breaker 102, a second measurement and control unit 104 for measuring the main bus 103, a communication unit 106 for transmitting a measurement result obtained by the second measurement and control unit 104 to a network terminal 105, and a human-machine interface 107 for interacting with an operator. One end 1021 of the second circuit breaker 102 is connected to the second incoming line 101, and the other end 1022 is connected to the main bus 103.
As an example, the inlet cabinet 100 may be a power inlet management and control node of a low-voltage switchgear assembly. The upper port (i.e. one end 1021 of the second circuit breaker 102) of the second circuit breaker 102 is connected to the incoming line power supply (receiving low voltage power through the second incoming line 101), and the lower port (i.e. the other end 1022 of the second circuit breaker 102) is connected to the main bus 103. Incoming line data (i.e., data to be monitored in the incoming line cabinet 100, including voltage, current, temperature, etc.) is measured by the second measurement and control unit 104 (e.g., an intelligent measurement and control unit). After the second measurement and control unit 104 finishes data collection and/or conversion, the network terminal 105 and the human-computer interface 107 may be connected through a communication unit 106 (e.g., a digital communication unit), so as to implement network management and control and management of the human-computer interface of the cabinet.
It can be understood that in the utility model, because the second measurement and control unit 104 and the communication unit 106 are arranged in the inlet cabinet 100, each cabinet (including the inlet cabinet and the reactive compensation cabinet) has the capability of internet of things, and can acquire various data (such as a large amount of data of current, voltage, temperature, and the like) in the cabinet body in real time and upload the data to the network terminal 105 (to realize functions such as storage, analysis, and the like) through the network, thereby realizing the low-voltage switch reactive compensation cabinet based on the internet of things. Therefore, local unattended operation or unattended operation of the distribution rooms can be achieved, and the distribution rooms can be subjected to intensive network monitoring, so that the working intensity is reduced, the working efficiency is improved (intensive management conditions are achieved), and the operation cost is reduced. When the operation is abnormal, the system can rapidly alarm and rapidly locate faults, so that loss expansion is prevented, and original data tracing is provided for event processing. And because a large amount of historical data and real-time data can be uploaded and stored, the analysis can be carried out in real time, and powerful support can be provided for fault diagnosis and improvement perfection of the whole power distribution system. In addition, the low-voltage switch reactive power compensation cabinet based on the Internet of things can be linked with video equipment to synchronously record video screenshots of the operation of each control node in the power distribution process, so that the record of an operation image can be provided.
As shown in fig. 4, in the embodiment of the internet of things-based low-voltage switch reactive power compensation cabinet of the present invention, a dynamic configuration diagram 108 of the inlet cabinet can be displayed on a human-computer interface 107 of the inlet cabinet 100, so as to display an electrical schematic diagram 109 and a real-time working state 110 of the inlet cabinet in a dynamic diagram form (in fig. 4, two inlet cabinets 100 are displayed, which respectively correspond to a # 1 transformer and a # 2 transformer, and simultaneously, two SVG cabinets and a dynamic configuration diagram of a bus coupler cabinet are displayed, which is convenient for integration and observation.
According to an exemplary embodiment, the electrical schematic diagram 109 of the inlet cabinet 100 of the present invention shows the switching states of the second circuit breaker 102 in different colors; the real-time operating status 110 of the inlet cabinet 100 includes at least one of the following: split-phase current, active power and temperature in the cabinet. As an example, the switching states of the second circuit breaker 102 include a closing state indicated by red and an opening state indicated by green.
It can be understood that, as the electrical schematic diagram and the real-time working state of the inlet cabinet are displayed in the manner of innovatively using the inlet cabinet dynamic configuration diagram 108, the monitoring is not required through manual meter reading records, and the human-computer interaction is very convenient and intuitive, so that the performance of each cabinet (such as the inlet cabinet and the reactive compensation cabinet) in the low-voltage distribution electric switch system is greatly improved in the aspect of the human-computer interaction capability, the running condition of each cabinet (such as the inlet cabinet and the reactive compensation cabinet) can be comprehensively known in real time, and the safe running is ensured. Once a fault and an accident occur, the judgment can be intuitively carried out, so that the fault diagnosis time is short, and the influence on the normal use of a user is small.
According to an exemplary embodiment of the utility model, the second instrumentation unit 104 comprises at least one of: the second current measurement circuit 1041 measures the current of the main bus 103 by using a current transformer 1044; a second voltage measurement circuit 1042 interconnected with said main bus 103 via a fuse 1045 for measuring voltage; the second temperature measurement circuit 1043 measures the temperature of the main bus 103 by using a temperature sensor 1046.
For example, the current of the main bus 103 may be collected by the current transformer 1044 at the lower port of the second circuit breaker 102 and transmitted to the second measurement and control unit 104. The voltage of the main bus 103 can be collected from the lower port voltage of the second circuit breaker 102 and transmitted to the second measurement and control unit 104 through the fuse 1045. The temperature of the main bus 103 can also be obtained by collecting the temperature of the second circuit breaker 102 by a temperature sensor 1046 (e.g. a digital temperature sensor) and transmitting the temperature to the second measurement and control unit 104. In addition, the switching state of the second circuit breaker 102 can be obtained by collecting the auxiliary contact signal of the second circuit breaker 102 and transmitting the signal to the second measurement and control unit 104. The second circuit breaker 102 can be controlled by the second measurement and control unit 104, for example, the second measurement and control unit 104 can transmit a control signal to a control contact of the second circuit breaker 102, so as to control a switch state, and further manage and control an incoming power supply (for example, an input power supply of the second incoming line 101).
According to an exemplary embodiment of the utility model, the human-machine interface 107 is further capable of displaying at least one of: split-phase voltage, split-phase current, zero line current, split-phase active power, split-phase reactive power, split-phase apparent power, split-phase active electric energy, split-phase reactive electric energy, split-phase power factor, frequency, cabinet temperature, phasor diagram, split-phase harmonic current, fundamental current, 3-31 harmonic current split-phase histogram. In addition, the second human-machine interface 207 is also able to display zero sequence currents (or called "residual currents").
According to an exemplary embodiment of the present invention, the communication unit 106 may be connected to the incoming line cabinet communication interface 1047 of the second measurement and control unit 104 through an RS485 interface 1061, the second measurement and control unit 104 receives a second control signal transmitted from the network terminal 105 through the communication unit 106, and the second control signal includes a signal for controlling a switching state of the second circuit breaker 102.
According to an exemplary embodiment of the present invention, the communication unit 106 may be connected to the human-machine interface 107 via an RS232 data interface 1062 (or an RS485 interface, as shown in fig. 4), and may communicate with the network switch 1051, the gateway 1052 and the internet 1053 of the network end 105 via an ethernet interface 1063.
It can be understood that the RS485 interface (for example, using MODBUS RTU protocol) has faster data transmission rate and stronger capability, and thus is more suitable for transmitting the second measurement and control unit and a large amount of data collected by the second measurement and control unit. And the RS232 data interface transmits data with a data rate lower than that of the RS485 interface, so that the RS232 data interface is suitable for being connected with the human-computer interface 107 so as to transmit data suitable for being observed by human eyes. The ethernet interface 1063 (for example, using MODBUS TCP protocol) can convert the device layer communication network into 104 communication protocol via the gateway, and connect to, for example, a cloud platform through a private network or a public network, and implement network intensive management of each cabinet, such as an incoming line cabinet, an outgoing line cabinet, and the like, by using, for example, the cloud platform, so that the single cabinet bodies, such as the incoming line cabinet, the outgoing line cabinet, and the like, have an internet of things capability. In addition, the power supply for the communications unit 106 may be provided by an auxiliary power interface to the bottom layer DC24V DC, or may be provided by a UPS supply network.
For example, in an inlet cabinet and a reactive compensation cabinet, when a breaker is closed, a power supply supplies power; when the breaker is disconnected, the power supply is powered off, so that the on-off (or on-off) control of the incoming power supply and the outgoing power supply is realized. Power supply and security data in the incoming line cabinet and the outgoing line cabinet can be collected and reported in real time by respective measurement and control units, and the state of the circuit breaker can be remotely controlled by the respective measurement and control units through receiving network commands or can be manually controlled locally. The respective measurement and control units in the incoming line cabinet and the outgoing line cabinet can be connected with the equipment layer communication network through the corresponding communication units. For example, power inlet wire node data can be collected and reported by the measurement and control unit, voltage data can be collected from the main bus, current data can be collected through current transformer, breaker shell temperature and main bus temperature can be collected by digital temperature sensor, the on-off state of the circuit breaker can be collected from the corresponding terminal of the circuit breaker, and the circuit breaker can also be controlled remotely through the circuit breaker control terminal through remote control signals.
According to an exemplary embodiment of the present invention, the network further includes a server (which may be a local server, a cloud server, or the like), which includes at least one of the following units (each unit has a corresponding function): the device comprises an online data display unit, an online dynamic configuration diagram display unit, an online carbon emission statistical unit and an online energy flow diagram display unit.
Wherein, the online data display unit displays at least one of the following data of each cabinet (such as the incoming line cabinet 100, the outgoing line cabinet 200, the capacitance compensation cabinet 300, the reactive compensation cabinet 400, the active filter cabinet 500, the bus coupler cabinet 600, etc.): split-phase voltage, split-phase current, zero line current, split-phase active power, split-phase reactive power, split-phase apparent power, split-phase active electric energy, split-phase reactive electric energy, split-phase power factor, frequency, cabinet temperature, phasor diagram, split-phase harmonic current, fundamental current, 3-31 harmonic current split-phase histogram.
The online data display unit can guarantee the whole safe operation of the power distribution switch system, for example, the online data display unit can monitor the power inlet wire control node of the low-voltage power distribution system for full-electric-quantity data, electric fire data, energy consumption data, electric energy quality data and communication network, count and analyze the collected data, and detect abnormal classified early warning and alarming, so that the aims of actively preventing and realizing the safe operation of the power distribution and transformation system are fulfilled. In addition, the online data display unit can also display functions of zero line current measurement, power flow measurement, switching value signal acquisition, multipoint temperature measurement, network control, local latching network control and the like.
The online dynamic configuration diagram display unit displays the electrical schematic diagram and the real-time working state of each cabinet (such as the incoming line cabinet 100, the outgoing line cabinet 200, the capacitance compensation cabinet 300, the reactive compensation cabinet 400, the active filter cabinet 500, the bus connection cabinet 600, and the like) in a dynamic diagram form; the electrical schematic diagram of each cabinet shows the switch state by different colors; the real-time working state of each cabinet comprises at least one of the following items: split-phase current, active power and temperature in the cabinet.
It can be understood that the electric schematic diagram and the real-time working state of each cabinet can be displayed in the form of an online dynamic configuration diagram, and the method is very intuitive and convenient. Therefore, the monitoring is not needed through manual meter reading records, the human-computer interaction is very convenient and visual, the performance of each cabinet in the low-voltage distribution electric switch system is greatly improved in the aspect of human-computer interaction capacity, the running condition of each cabinet can be comprehensively known in real time, and the safe running is guaranteed. Once a fault and an accident occur, the judgment can be intuitively carried out, so that the fault diagnosis time is short, and the influence on the normal use of a user is small.
The online carbon emission statistical unit is used for counting and displaying at least one of the following items in an area where the low-voltage switch reactive power compensation cabinet based on the Internet of things is applied: peak flat valley electric quantity proportion condition, energy consumption statistical condition, item energy consumption condition and classification energy consumption proportion condition. Wherein, the online energy flow graph showing unit shows at least one item in the following items in the form of energy flow graph: energy flow direction, node power supply data, load energy consumption data, power transformation loss data and transmission loss data.
It can be understood that the goals of energy saving and carbon reduction can be achieved through fine metering and carbon emission statistics. For example, energy consumption data of the incoming line node can be subjected to time-sharing statistics, itemization (for example, itemization statistics is performed according to each workshop), classification (for example, classification is performed according to illumination, refrigeration, heating, power and the like), zoning (for example, a certain building of a certain cell), special statistics and analysis, so that real-time energy consumption data change is monitored, and historical energy consumption data is traced, so that energy efficiency management and carbon emission statistics are realized. In addition, the transformer loss measurement and calculation and the transmission loss measurement and calculation can be carried out through the cooperation analysis with the superior node and the subordinate node, so that the online rapid diagnosis is realized, the loss abnormity and the energy consumption abnormity are found in time, and the data support is provided for the transformation of high-energy-consumption old equipment. In addition, the quality analysis can be carried out on the electric energy of the incoming line node, so that data support is provided for improving the electric energy quality and realizing energy conservation and consumption reduction. And, the abnormal data of the incoming line node can be recorded (for example, fault recording), so that event recollection is provided.
In summary, the low-voltage switch reactive power compensation cabinet based on the internet of things is an intelligent power distribution cabinet of the internet of things, belongs to a new generation of 'interconnection + power' products, and forms a new generation of cross-boundary products integrating the technologies of power, electronics, communication, IT and the like. Compared with the traditional power distribution cabinet, the power distribution cabinet has the functions of precise measurement and control and internet and adopts the human-computer interface for interactive display, so that the power distribution cabinet has the capability of monitoring all-node online data. The low-voltage distribution switch system (such as the incoming line cabinet 100, the outgoing line cabinet 200, the capacitance compensation cabinet 300, the reactive compensation cabinet 400, the active filter cabinet 500, the bus connection cabinet 600 and the like) integrates full electric quantity measurement, switching quantity measurement, electric energy quality measurement and electric fire monitoring, and can be matched with a cloud platform to form an intelligent distribution system, an energy management system, an electric fire monitoring system and an intelligent operation and maintenance system, so that the low-voltage distribution switch system is a system data acquisition and distribution control terminal. The low-voltage distribution switch system (such as the incoming line cabinet 100, the outgoing line cabinet 200, the capacitance compensation cabinet 300, the reactive compensation cabinet 400, the active filter cabinet 500, the bus coupler cabinet 600 and the like) can realize intelligent operation and maintenance of a distribution room, energy management and control, electrical fire monitoring, carbon emission statistics, distribution network full-node operation data application, energy efficiency management, power consumption monitoring and energy consumption early warning, and provide energy-saving potential key data such as power transformation loss measurement, transmission loss measurement, load energy consumption measurement and the like. By adopting the scheme of the utility model, the aim of data driving decision can be realized, and the intelligent application of the intelligent power distribution cabinet of the Internet of things can provide data support and implementation strategies for energy-saving management and energy-saving reconstruction.
The units and functions described in this disclosure may be implemented at least in part by one or more hardware logic components, hardware circuits, hardware units, hardware modules, etc., in hardware or firmware. By way of example, and not limitation, illustrative types of hardware logic components that may be used include Field Programmable Gate Arrays (FPGAs), Application Specific Integrated Circuits (ASICs), Application Specific Standard Products (ASSPs), system on a chip (SOCs), Complex Programmable Logic Devices (CPLDs), and the like. From the above description of the embodiments, it will be clear to those skilled in the art that the present invention may be implemented by other structures, and the features of the present invention are not limited to the above preferred embodiments. Any changes or modifications that can be easily conceived by those skilled in the art are also intended to be covered by the scope of the present invention.
Claims (10)
1. A low-voltage switch reactive power compensation cabinet based on the Internet of things is characterized by comprising a cabinet body;
the cabinet body comprises a first incoming line connected with a main bus of the incoming line cabinet, a first breaker connected with the first incoming line, an SVG unit connected with the first breaker, and a first measurement and control unit used for measuring a connecting line between the first breaker and the SVG unit;
the SVG unit comprises an inductor connected with the first circuit breaker, an IGBT connected with the inductor and a support capacitor connected with the IGBT; a reactive cabinet communication interface connected with the communication unit of the incoming line cabinet is arranged on the first measurement and control unit; the communication unit is used for transmitting the measurement result obtained by the first measurement and control unit to a network end; and a dynamic configuration diagram of the reactive power compensation cabinet is displayed on a human-computer interface of the incoming line cabinet, and the dynamic configuration diagram of the reactive power compensation cabinet shows an electrical schematic diagram and a real-time working state of the reactive power compensation cabinet in a dynamic diagram form.
2. The low-voltage switch reactive power compensation cabinet based on the Internet of things of claim 1, wherein the electrical schematic diagram of the reactive power compensation cabinet shows the switch state of the first circuit breaker in different colors;
the real-time working state of the reactive compensation cabinet comprises at least one of the following items: split-phase current, active power and temperature in the cabinet.
3. The low-voltage switch reactive power compensation cabinet based on the internet of things of claim 2, wherein the switch state of the first circuit breaker comprises a closing state represented by red and an opening state represented by green.
4. The low-voltage switch reactive power compensation cabinet based on the Internet of things according to any one of claims 1 to 3, wherein the first measurement and control unit comprises at least one of the following items:
the first current measurement loop measures the current of the connecting line by adopting a current transformer;
a first voltage measurement circuit interconnected with the connection line via a fuse for measuring a voltage;
and the first temperature measurement loop adopts a temperature sensor to measure the temperature of the connecting wire.
5. The IOT-based low voltage switch reactive power compensation cabinet according to any one of claims 1-3, wherein the first measurement and control unit further comprises a controller, the controller comprising at least one of:
the cabinet body state monitoring unit is used for monitoring at least one of working parameters, energy consumption states and switch states of the pipe control nodes in the cabinet body;
the load state monitoring unit is used for monitoring at least one of working parameters, energy consumption states and switch states of the load;
the electric fire monitoring unit is used for monitoring residual current and temperature measurement in the cabinet body and giving an open circuit or short circuit alarm when fire hazards exist;
the power parameter monitoring unit is used for monitoring at least one of split-phase voltage, combined-phase voltage, split-phase current, combined-phase current, zero line current, split-phase active power, combined-phase active power, split-phase reactive power, combined-phase reactive power, split-phase apparent power and combined-phase apparent power in the cabinet body;
the electric energy metering and monitoring unit is used for monitoring at least one of split-phase active electric energy, combined-phase active electric energy, split-phase reactive electric energy and combined-phase reactive electric energy in the cabinet body;
a power quality monitoring unit; the phase-splitting power factor monitoring device is used for monitoring at least one of phase-splitting power factor, phase-combining power factor, phase-splitting harmonic current and phase-combining harmonic current in the cabinet body.
6. The low-voltage switch reactive power compensation cabinet based on the internet of things as claimed in any one of claims 1 to 3, wherein the incoming cabinet comprises a second incoming line for receiving a low-voltage power supply input, a second circuit breaker connected with the second incoming line, a main bus connected with the second circuit breaker, a second measurement and control unit for measuring the main bus, the communication unit for transmitting a measurement result obtained by the second measurement and control unit to the network side, and the human-computer interface for interacting with an operator; one end of the second breaker is connected with the second incoming line, and the other end of the second breaker is connected with the main bus.
7. The low-voltage switch reactive power compensation cabinet based on the internet of things as claimed in claim 6, wherein the communication unit is connected with a communication interface of a line inlet cabinet of the second measurement and control unit through an RS485 interface, and the second measurement and control unit receives a control signal from the network terminal and transmitted through the communication unit.
8. The internet of things-based low-voltage switch reactive compensation cabinet according to claim 7, wherein the control signal comprises a signal for controlling the switch state of the second circuit breaker; the communication unit is connected with the human-computer interface through an RS232 data interface and is communicated with a network switch, a gateway and the Internet of the network end through an Ethernet interface.
9. The IOT-based low voltage switch reactive power compensation cabinet according to any one of claims 1-3, wherein the human-machine interface is further capable of displaying at least one of the following of the reactive power compensation cabinet:
split-phase voltage, split-phase current, zero line current, split-phase active power, split-phase reactive power, split-phase apparent power, split-phase active electric energy, split-phase reactive electric energy, split-phase power factor, frequency, temperature in a cabinet, phasor diagram, split-phase harmonic current, fundamental current and 3-31 th harmonic current split-phase histogram.
10. The low-voltage switch reactive power compensation cabinet based on the Internet of things according to any one of claims 1 to 3, wherein the network end further comprises a server which comprises at least one of the following items:
an online data display unit which displays at least one of the following data of the reactive compensation cabinet: split-phase voltage, split-phase current, zero line current, split-phase active power, split-phase reactive power, split-phase apparent power, split-phase active electric energy, split-phase reactive electric energy, split-phase power factor, frequency, cabinet temperature, phasor diagram, split-phase harmonic current, fundamental current, 3-31 th harmonic current split-phase histogram;
the online dynamic configuration diagram display unit is used for displaying an electrical schematic diagram and a real-time working state of the reactive compensation cabinet in a dynamic diagram form;
an online carbon emission statistical unit for counting and displaying at least one of the following items in the area where the reactive compensation cabinet is applied: peak flat valley electric quantity proportion condition, energy consumption statistical condition, item energy consumption condition and classified energy consumption proportion condition;
an online energy flow graph presentation unit that presents at least one of the following in an energy flow graph form: energy flow direction, node power supply data, load energy consumption data, power transformation loss data and transmission loss data.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117691621A (en) * | 2024-01-31 | 2024-03-12 | 山东新大陆电力股份有限公司 | Low-voltage switch capacitance compensation cabinet based on Internet of things |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117691621A (en) * | 2024-01-31 | 2024-03-12 | 山东新大陆电力股份有限公司 | Low-voltage switch capacitance compensation cabinet based on Internet of things |
| CN117691621B (en) * | 2024-01-31 | 2024-04-12 | 山东新大陆电力股份有限公司 | Low-voltage switch capacitance compensation cabinet based on Internet of things |
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