CN114256985B

CN114256985B - Low-voltage power distribution switch system based on Internet of things

Info

Publication number: CN114256985B
Application number: CN202210183350.0A
Authority: CN
Inventors: 毕兰星; 刘朝阳; 王颖; 许磊
Original assignee: Ineco Beijing Intelligent System Co ltd
Current assignee: Ineco Beijing Intelligent System Co ltd
Priority date: 2022-02-28
Filing date: 2022-02-28
Publication date: 2022-05-06
Anticipated expiration: 2042-02-28
Also published as: CN114256985A

Abstract

The invention discloses a low-voltage distribution switch system based on the Internet of things, which comprises: the incoming line cabinet comprises a first incoming line for receiving input of a low-voltage power supply, a first breaker connected with the first incoming line, a first main bus connected with the first breaker, a first measurement and control module for measuring the first main bus, a first communication module for transmitting a measurement result obtained by the first measurement and control module to a network end, and a first human-computer interface for interacting with an operator; and the outgoing line cabinet comprises a second incoming line connected with the first main bus, a second breaker connected with the second incoming line, a feeding-out line connected with the second breaker, a second measurement and control module used for measuring the feeding-out line, a second communication module used for transmitting a measurement result obtained by the second measurement and control module to the network end, and a second human-computer interface interacted with an operator.

Description

Low-voltage power distribution switch system based on Internet of things

Technical Field

Embodiments of the present disclosure relate generally to the field of low voltage power distribution, and more particularly, to a low voltage power distribution switch system based on the internet of things.

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 low-voltage distribution switch system widely used at present, each cabinet has no network internet of things capability, so that the data collection and transmission capability is poor, a large amount of 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.

Moreover, each 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 enough to be ensured. 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.

Disclosure of Invention

It is a primary object of the present invention to provide an internet of things based low voltage power distribution switch system to address at least one of the above problems and other potential problems in the prior art.

In order to achieve the above object, the present invention provides a low voltage distribution switch system based on the internet of things, including: the incoming line cabinet comprises a first incoming line for receiving the input of a low-voltage power supply, a first breaker connected with the first incoming line, a first main bus connected with the first breaker, a first measurement and control module for measuring the first main bus, a first communication module for transmitting a measurement result obtained by the first measurement and control module to a network end, and a first human-computer interface for interacting with an operator; one end of the first breaker is connected with the first incoming line, and the other end of the first breaker is connected with the first main bus; the outgoing line cabinet comprises a second incoming line connected with the first main bus, a second breaker connected with the second incoming line, a feeding-out line connected with the second breaker, a second measurement and control module used for measuring the feeding-out line, a second communication module used for transmitting a measurement result obtained by the second measurement and control module to the network end, and a second human-computer interface interacted with an operator; one end of the second circuit breaker is connected with the second incoming line, and the other end of the second circuit breaker is connected with the outgoing line; the first human-computer interface can display a dynamic configuration diagram of the incoming line cabinet so as to display an electrical schematic diagram and a real-time working state of the incoming line cabinet in a dynamic diagram form; the second human-computer interface can display a dynamic configuration diagram of the line cabinet so as to display the electrical schematic diagram and the real-time working state of the outgoing line cabinet in a dynamic diagram form.

According to an exemplary embodiment of the present invention, the electrical schematic diagram of the inlet cabinet shows the switch states of the first circuit breaker with different colors; the real-time working state of the incoming cabinet comprises at least one of the following items: split-phase current, active power and temperature in the cabinet; the electrical schematic diagram of the outlet cabinet shows the switch states of the second circuit breaker by different colors; the real-time working state of the outgoing line cabinet comprises at least one of the following items: split-phase current, active power and temperature in the cabinet.

According to an exemplary embodiment of the present invention, the switching state of the first circuit breaker includes a closing state represented by red and an opening state represented by green; the switching states of the second circuit breaker include a closing state represented by red and an opening state represented by green.

According to an exemplary embodiment of the invention, the first instrumentation module comprises at least one of: the first current measurement loop is used for measuring the current of the first main bus by adopting a current transformer; a first voltage measurement circuit interconnected with the first main bus via a fuse for measuring voltage; and the first temperature measurement loop adopts a temperature sensor to measure the temperature of the first main bus.

According to an exemplary embodiment of the invention, the second instrumentation module comprises at least one of: the second current measurement loop is used for measuring the current of the feed-out line by adopting a current transformer; a second voltage measurement circuit interconnected with the feed-out line via a fuse for measuring voltage; the second temperature measurement loop is used for measuring the temperature of the feed-out wire by adopting a temperature sensor; and the residual current transformer is used for measuring the residual current of the feed-out line.

According to an exemplary embodiment of the invention, the first human machine interface or the second human machine interface 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.

According to an exemplary embodiment of the invention, the first communication module is connected with a communication interface of a line inlet cabinet of the first measurement and control module through an RS485 interface, the first measurement and control module receives a first control signal which is sent from the network terminal and is transmitted through the first communication module, and the first control signal includes a signal for controlling a switch state of the first circuit breaker; the second communication module is connected with an outlet cabinet communication interface of the second measurement and control module through an RS485 interface, the second measurement and control module receives a second control signal which is sent from the network end and is transmitted through the second communication module, and the second control signal comprises a signal for controlling the on-off state of the second circuit breaker; the first communication module is connected with the first 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; and the second communication module is connected with the second 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 exemplary embodiment of the invention, the internet of things based low voltage distribution switch system further comprises at least one of the following: the capacitance compensation cabinet comprises a third incoming line connected with the first main bus, a knife-fuse switch connected with the third incoming line, a capacitance module connected with the knife-fuse switch line, and a third measurement and control module used for measuring a third connecting line between the knife-fuse switch and the capacitance module; wherein the capacitance module comprises a power capacitor; the third measurement and control module comprises a capacitor cabinet communication interface, a third current measurement circuit, a third voltage measurement circuit and a third temperature measurement circuit, wherein the capacitor cabinet communication interface, the third current measurement circuit, the third voltage measurement circuit and the third temperature measurement circuit are connected with the first communication module; the reactive compensation cabinet comprises a fourth incoming line connected with the first main bus, a fourth circuit breaker connected with the fourth incoming line, an SVG module connected with the fourth circuit breaker, and a fourth measurement and control module used for measuring a fourth connecting line between the fourth circuit breaker and the SVG module; the SVG module comprises a first inductor connected with the fourth circuit breaker, a first IGBT connected with the first inductor and a support capacitor connected with the first IGBT; the fourth measurement and control module comprises a reactive cabinet communication interface, a fourth current measurement circuit, a fourth voltage measurement circuit and a fourth temperature measurement circuit, wherein the reactive cabinet communication interface, the fourth current measurement circuit, the fourth voltage measurement circuit and the fourth temperature measurement circuit are connected with the first communication module; the active filter cabinet comprises a fifth incoming line connected with the first main bus, a fifth breaker connected with the fifth incoming line, an APF module connected with the fifth breaker, and a fifth measurement and control module used for measuring a fifth connecting line between the fifth breaker and the APF module; the APF module comprises a second inductor connected with the fifth circuit breaker, a second IGBT connected with the second inductor and a support capacitor connected with the second IGBT; the fifth measurement and control module comprises an active cabinet communication interface, a fifth current measurement circuit, a fifth voltage measurement circuit and a fifth temperature measurement circuit, wherein the active cabinet communication interface, the fifth current measurement circuit, the fifth voltage measurement circuit and the fifth temperature measurement circuit are connected with the first communication module; the busbar joint cabinet is used for connecting the first main bus and the second main bus, the busbar joint cabinet comprises a sixth inlet wire connected with the first main bus, a sixth circuit breaker connected with the sixth inlet wire, and a sixth measurement and control module used for measuring a sixth connecting wire between the sixth circuit breaker and the second main bus, and the sixth measurement and control module comprises a busbar joint cabinet communication interface connected with the first communication module, a sixth current measurement loop, a sixth voltage measurement loop and a sixth temperature measurement loop.

According to an exemplary embodiment of the invention, at least one of the following items can also be displayed on the first human-machine interface: the capacitance compensation cabinet comprises a capacitance cabinet dynamic configuration diagram, so that an electrical schematic diagram and a real-time working state of the capacitance compensation cabinet are shown in a dynamic diagram form; the electrical schematic diagram of the capacitance compensation cabinet shows the switch state of the knife-shaped fused switch by different colors; the real-time working state of the capacitance compensation cabinet comprises at least one of the following items: split-phase current, active power and temperature in the cabinet; the dynamic configuration diagram of the reactive power compensation cabinet is used for displaying the electric schematic diagram and the real-time working state of the reactive power compensation cabinet in a dynamic diagram form; the electrical schematic diagram of the reactive compensation cabinet shows the switch state of the fourth 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; the dynamic configuration diagram of the master cabinet is used for displaying the electrical schematic diagram and the real-time working state of the master cabinet in a dynamic graphic form; the electrical schematic diagram of the busbar cabinet shows the switch state of the sixth circuit breaker by different colors; the real-time working state of the master coupler cabinet comprises at least one of the following items: split-phase current, active power and temperature in the cabinet.

According to an exemplary embodiment of the present invention, the network further comprises a server, which includes at least one of the following functions: an online data presentation function that presents at least one of the following data for each of the cabinets: 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 function is used for displaying the electrical schematic diagram and the real-time working state of each cabinet 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; an online carbon emission statistical function for counting and displaying at least one of the following in an area where the internet of things based low voltage distribution switch system 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 function that presents, in energy flow graph form, at least one of: 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 invention.

Fig. 2 is a schematic diagram (in the form of a single-line diagram) of a partial electrical structure of the incoming 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 inlet cabinet according to the embodiment of the present invention.

Fig. 4 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. 5 is a schematic diagram (in the form of a single-line diagram) of a partial electrical structure of the outlet cabinet according to the embodiment of the present invention.

Fig. 6 is a schematic diagram (in the form of a circuit diagram) of a partial electrical structure of the outlet 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 outlet cabinet according to the embodiment of the present invention.

Fig. 8 is a dynamic configuration diagram of a first human-machine interface in an incoming line cabinet according to an embodiment of the invention.

Fig. 9 is a dynamic configuration diagram of the outlet cabinet of the second human-machine interface in the outlet cabinet according to the embodiment of the invention.

FIG. 10 is a schematic diagram (in the form of a single-line diagram) of a partial electrical structure of a capacitance compensation cabinet according to an embodiment of the present invention.

FIG. 11 is a schematic diagram (in the form of a circuit diagram) of a partial electrical structure of the capacitance compensation cabinet according to the embodiment of the present invention.

Fig. 12 is a schematic diagram (in the form of a single-line diagram) of a partial electrical structure of a reactive power compensation cabinet according to an embodiment of the present invention.

Fig. 13 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. 14 is a schematic diagram (in the form of a single-line diagram) of a partial electrical structure of an active filter cabinet according to an embodiment of the present invention.

Fig. 15 is a schematic electrical structural diagram (in the form of a circuit diagram) of a part of an active filter cabinet according to an embodiment of the present invention.

Fig. 16 is a schematic diagram (in the form of a single-line diagram) of a partial electrical structure of a bus coupler cabinet according to an embodiment of the present invention.

Fig. 17 is a schematic diagram (in the form of a circuit diagram) of a partial electrical structure of the bus coupler 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 should be understood that the terms "first", "second", "third", "fourth", "fifth" and "sixth" 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, features defined as "first", "second", "third", "fourth", "fifth", "sixth" may explicitly or implicitly include one or more of the features. 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 9, an embodiment of the present invention provides an internet of things-based low-voltage distribution switch system (also 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 to receive electric energy from a power grid, as shown by a dashed box in fig. 2) and an outgoing line cabinet 200 (also referred to as a power feeding cabinet or a power distribution cabinet, which are used to distribute electric energy, as shown by a dashed box in fig. 5). It will be appreciated that by the structure of the inlet and

outlet cabinets

100 and 200, the input low voltage (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 home use or industrial use). For another example, the incoming cabinet 100, outgoing cabinet 200, etc. in the low-voltage distribution switch system may be in the form of a draw-out low-voltage switch cabinet (where the outgoing cabinet 200 may be a drawer-type switch cabinet), and the use and maintenance are more convenient.

As shown in fig. 2-4, the inlet box 100 includes a first 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 first breaker 102 connected to the first inlet 101 (the detailed structure of the first breaker 102 is shown in the upper right of fig. 3, which is a diagram of an electrical diagram), a first main bus 103 connected to the first breaker 102, a first measurement and control module 104 for measuring the first main bus 103, a first communication module 106 for transmitting a measurement result obtained by the first measurement and control module 104 to a network terminal 105, and a first human-machine interface 107 for interacting with an operator. One end 1021 of the first circuit breaker 102 is connected to the first incoming line 101, and the other end 1022 is connected to the first 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 first circuit breaker 102 has an upper port (i.e., one end 1021 of the first circuit breaker 102) connected to the incoming power (receiving low voltage power through the first incoming line 101), and a lower port (i.e., the other end 1022 of the first circuit breaker 102) connected to the first 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 a first measurement and control module 104 (e.g., an intelligent measurement and control module). After the first measurement and control module 104 finishes data collection and/or conversion, the first communication module 106 (e.g., a digital communication module) may be connected to the network 105 and the first human-machine interface 107, so as to implement network management and control and management of the human-machine interface of the cabinet.

As shown in fig. 5-7, the outgoing line cabinet 200 includes a second incoming line 201 connected to the first main bus 103 (i.e., the outgoing line cabinet 200 and the incoming line cabinet 100 share one main bus), a second circuit breaker 202 connected to the second incoming line 201, a feeding line 203 (or referred to as "outgoing line") connected to the second circuit breaker 202, a second measurement and control module 204 for measuring the feeding line 203, a second communication module 206 for transmitting a measurement result obtained by the second measurement and control module 204 to the network terminal 105, and a second human-machine interface 207 interacting with an operator; one end 2021 of the second circuit breaker 202 is connected to the second incoming line 201, and the other end 2022 is connected to the outgoing line 203.

As an example, the outlet cabinet 200 may be a power outlet management node of a low-voltage switchgear assembly. The feeding-out line 203 may be one or more feeding-out lines (fig. 5 shows multiple feeding-out lines, for example, multiple feeding-out lines are accommodated in one outgoing line cabinet 200, and each feeding-out line is provided with a corresponding measurement and control module and a corresponding breaker to form 1 st to N th loops). The upper port (i.e., one end 2021 of the second circuit breaker 202) of each second circuit breaker 202 is connected to the first main bus 103 (connected to the first main bus 103 via the second incoming line 201), the lower port (i.e., the other end 2022 of the second circuit breaker 202) is connected to each corresponding outgoing feeder line (which may be connected to a load or a load, respectively), and data of each outgoing feeder line may be measured by the second measurement and control module 204 (e.g., an intelligent measurement and control module). After each path of data collection and/or conversion is completed by each path of second measurement and control module 204, the network terminal 105 (i.e. the incoming line cabinet 100 and the outgoing line cabinet 200 can share one network terminal, so that the overall structure is simpler and lower in cost) and the second human-computer interface 207 are connected through the second communication module 206 (e.g. a digital communication module, and each path of outgoing line shares the same communication module, and the structure is simple and lower in cost, for example, the outgoing line cabinet with 6 outgoing line loops, 6 circuit breakers, 6 corresponding measurement and control modules, and one communication module) of the cabinet, so as to realize network management and control and human-computer interface management of the cabinet.

It can be understood that in the invention, since the first measurement and control module 104 and the first communication module 106 are arranged in the incoming line cabinet 100 and the second measurement and control module 204 and the second communication module 206 are arranged in the outgoing line cabinet 200, each cabinet (including the incoming line cabinet 100 and the outgoing line cabinet 200) has the capability of internet of things, and can acquire various data (such as current, voltage, temperature and other large amount of data) in the cabinet body in real time and upload the data to the network terminal 105 through the network (to realize functions such as storage, analysis and the like), so that each cabinet has the capability of internet of things, and a low-voltage power distribution switch system based on internet of things can be realized. Therefore, local unattended operation or unattended operation of the distribution rooms can be achieved, and the plurality of distribution rooms can be subjected to intensive network monitoring, so that the working strength 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 power distribution switch system 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 the operation image can be provided.

As shown in fig. 8-9, in the embodiment of the low-voltage distribution switch system based on the internet of things according to the present invention, a dynamic configuration diagram 108 of the inlet cabinet can be displayed on a first human-machine 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. 8, two inlet cabinets 100 are displayed, which respectively correspond to a 1# transformer and a 2# transformer, and dynamic configuration diagrams of two SVG cabinets and a buscouple cabinet are also displayed, so that integration and observation are facilitated, the cost is lower, and more detailed cabinet operation data can be viewed by clicking "detailed data"). A line cabinet dynamic configuration diagram 208 (multiple outgoing lines are shown in the feeder/outgoing line cabinet in fig. 9, corresponding to multiple loads or loads, and at this time, the electrical operation condition on each outgoing line can be checked by clicking "detailed data") can be displayed on the second human-computer interface 207 of the outgoing line cabinet 200, so that an electrical schematic diagram 209 and a real-time working state 210 of the outgoing line cabinet are displayed in a dynamic diagram form.

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 first 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. The electrical schematic 209 of the outlet cabinet 200 shows the switch states of the second circuit breaker 202 in different colors; the real-time operational status 210 of the outlet cabinet 200 includes at least one of: split-phase current, active power and temperature in the cabinet. In addition, the dynamic configuration diagram can display information such as early warning and alarming besides the switch state. As an example, the switching states of the first circuit breaker 102 include a closing state represented by red and an opening state represented by green; the switching states of the second circuit breaker 202 include a closing state indicated by red and an opening state indicated by green.

It can be understood that, in the invention, the electrical schematic diagram and the real-time working state of the incoming line cabinet and the outgoing line cabinet are respectively displayed in a manner of innovatively using the dynamic configuration diagram 108 of the incoming line cabinet and the dynamic configuration diagram 208 of the outgoing line cabinet, so that monitoring is not required through manual meter reading records, human-computer interaction is very convenient and intuitive, the performance of each cabinet in the low-voltage distribution electric switch system is greatly improved in the aspect of human-computer interaction capability, the running condition of each cabinet can be comprehensively known in real time, and 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 invention, the first instrumentation module 104 comprises at least one of: a first current measurement circuit 1041, which measures the current of the first main bus 103 by using a current transformer 1044; a first voltage measurement circuit 1042 interconnected with said first main bus 103 via a fuse 1045 for measuring a voltage; the first temperature measurement circuit 1043 measures the temperature of the first main bus 103 using a temperature sensor 1046.

For example, the current of the first main bus 103 may be collected by a current transformer 1044 (TAa, TAb, TAc) at the lower port of the first circuit breaker 102, and transmitted to the first measurement and control module 104. The voltage of the first main bus 103 can collect the voltage of the lower port of the first breaker 102 and is transmitted to the first measurement and control module 104 through the fuse 1045 (FU 2, FU3, FU 4). The temperature of the first main bus 103 may also be obtained by a temperature sensor 1046 (e.g., a digital temperature sensor) to collect the temperature of the first circuit breaker 102 and transmit the temperature to the first measurement and control module 104. In addition, the switch state of the first circuit breaker 102 can be obtained by collecting the auxiliary contact signal of the first circuit breaker 102 and transmitting the signal to the first measurement and control module 104. The first circuit breaker 102 can be controlled by the first measurement and control module 104, for example, the first measurement and control module 104 can transmit a control signal to a control contact of the first 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 first incoming line 101).

According to an exemplary embodiment of the invention, the second instrumentation module 204 comprises at least one of: the second current measurement circuit 2041 measures the current of the feeding line 203 by using a current transformer 2044; a second voltage measuring circuit 2042 interconnected with the feeding line 203 via a fuse 2045 for measuring voltage; a second temperature measuring circuit 2043, which measures the temperature of the feeding line 203 by using a temperature sensor 2046; and a residual current transformer 2047 for measuring the residual current of the feeding line 203.

For example, the current of the feeding line 203 may be collected by a current transformer 2044 (TAa, TAb, TAc) at the lower port of the second circuit breaker 202, and transmitted to the second measurement and control module 204. The voltage of the feeding line 203 can collect the voltage of the lower port of the second breaker 202, and is transmitted to the second measurement and control module 204 through the fuse 2045 (FU 1, FU2, FU 3). The feeding line 203 may employ a temperature sensor 2046 to collect the temperature of the second circuit breaker 202 and transmit to the second measurement and control module 204. The switch state of the second circuit breaker 202 can be collected from the auxiliary contact signal of the second circuit breaker 202 and transmitted to the second measurement and control module 204. For example, in the presence of multiple feeder lines 203, each of the second circuit breakers 202 may be controlled by each of the second measurement and control modules 204, and at this time, a control signal for controlling each of the second measurement and control modules 204 may be transmitted to a control contact of each of the second circuit breakers 202, so as to manage and control each of the feeder line power supplies (for example, an input power supply of the second feeder line 201 and an output power supply of the corresponding feeder line 203). For another example, the residual current may be collected by the residual current transformer 2047 at the lower opening of the second circuit breaker 202 and transmitted to the second measurement and control module 204.

According to an exemplary embodiment of the invention, the first human-machine interface 107 or the second human-machine interface 207 may further be 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 can also display the residual current.

According to an exemplary embodiment of the present invention, the first communication module 106 may be connected to the incoming line cabinet communication interface 1047 of the first measurement and control module 104 through an RS485 interface 1061, and the first measurement and control module 104 receives a first control signal transmitted from the network terminal 105 through the first communication module 106, where the first control signal includes a signal for controlling a switch state of the first circuit breaker 102. The second communication module 206 is connected to the outlet cabinet communication interface 2048 of the second measurement and control module 204 through an RS485 interface 2061, the second measurement and control module 204 receives a second control signal from the network terminal 105 and transmitted through the second communication module 206, and the second control signal includes a signal for controlling the on-off state of the second circuit breaker 202.

According to an exemplary embodiment of the present invention, the first communication module 106 may be connected to the first human-machine interface 107 via an RS232 data interface 1062 (or an RS485 interface, as shown in fig. 4), and communicate with the network switch 1051, the gateway 1052 and the internet 1053 of the network end 105 via an ethernet interface 1063. The second communication module 206 is connected to the second human-machine interface 207 via an RS232 data interface 2062 (or an RS485 interface, as shown in fig. 7) and is connected to the network switch 1051, the gateway 1052 and the internet 1053 of the network end 105 via an ethernet interface 2063.

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 a large amount of data collected by the first measurement and control module and the second measurement and control module. And the data transmission rate of the RS232 data interface is less than that of the RS485 interface, so that the RS232 data interface is suitable for being connected with the first human-machine interface 107 and the second human-machine interface 207 so as to transmit data suitable for being observed by human eyes. The ethernet interface 1063 and the ethernet interface 2063 (for example, using the MODBUS TCP protocol) can convert the device layer communication network into the 104 communication protocol through 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 cabinets, such as the incoming line cabinet, the outgoing line cabinet, and the like, have an internet of things capability. In addition, the power supply of the first communication module 106 and the second communication module 206 may be connected to the DC power of the bottom layer DC24V through an auxiliary power interface, or may be supplied through a UPS power supply network.

For example, in an incoming cabinet and an outgoing cabinet, when a circuit 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 line power supply and the outgoing line power supply is realized. Power supply and security data in the incoming line cabinet and the outgoing line cabinet can be collected by the respective measurement and control modules and reported in real time, and the states of the circuit breakers can be remotely controlled by the respective measurement and control modules through receiving network commands or can be manually controlled locally. The respective measurement and control modules in the incoming line cabinet and the outgoing line cabinet can be connected with the equipment layer communication network through the corresponding communication modules. For example, power inlet wire node data can be collected and reported by the measurement and control module, 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.

As shown in fig. 1, according to an exemplary embodiment of the present invention, the internet of things-based low-voltage distribution switch system further includes at least one of the following items: the capacitance compensation cabinet 300 (shown by a dashed line box in fig. 10), the reactive compensation cabinet 400 (shown by a dashed line box in fig. 12), the active filter cabinet 500 (shown by a dashed line box in fig. 14), and the bus coupler cabinet 600 (shown by a dashed line box in fig. 16). For example, 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 other structures in the low-voltage distribution switch system can all adopt the form of a draw-out low-voltage switch cabinet, and the use and the maintenance are more convenient.

As shown in fig. 10-11, the capacitance compensation cabinet 300 (also called capacitor cabinet, compensation cabinet, for improving power factor) includes a third incoming line 301 connected to the first main bus 103, a fused knife switch 302 connected to the third incoming line 301, a capacitance module 303 wired to the fused knife switch 302, and a third measurement and control module 305 for measuring a third connection line 304 between the fused knife switch 302 and the capacitance module 303; wherein the capacitance module 303 comprises a power capacitor 3031; the third measurement and control module 305 includes a capacitance cabinet communication interface 3051 (i.e., the capacitance compensation cabinet 300 and the incoming line cabinet 100 share one communication module, so that the overall structure is simple and efficient, and the cost is lower), a third current measurement loop 3052, a third voltage measurement loop 3053, and a third temperature measurement loop 3054, which are connected to the first communication module 106. The third current measurement loop 3052 measures the current of the third connection line 304 by using a current transformer; a third voltage measurement loop 3053 interconnected with said third connection line 304 via a fuse for measuring a voltage; the third temperature measurement circuit 3054 measures the temperature of the third connection line 304 using a temperature sensor.

By way of example, capacitance compensation cabinet 300 may be a governing node for the power factor of the incoming line power supply (i.e., the power supply on third incoming line 301) of the low voltage switchgear cabinet set. The upper port of the knife-fuse switch 302 may be connected to the first main bus 103 and the lower port may be connected (or via a reactor, not shown) to the capacitor module 303. The compensation controller 3032 can control the compensation amount according to the collected voltage of the third connection line 304 and the current collected by the current transformer of the third connection line 304, so as to realize the power factor control of the incoming power supply (i.e. the power supply on the third incoming line 301). Data in capacitance compensation cabinet 300 can be measured by third measurement and control module 305. For example, the current of the third connection line 304 may be collected by a current transformer at the lower port of the knife switch 302 and transmitted to the third measurement and control module 305. The voltage of the third connection line 304 can collect the voltage of the lower port of the knife switch 302 and transmit the voltage to the third measurement and control module 305 through the fuse. The temperature of the third connection line 304 can be collected by a temperature sensor, for example, and transmitted to the third measurement and control module 305. In addition, the switch state of the knife-fuse switch 302 can be collected to switch auxiliary contact signals and transmitted to the third measurement and control module 305. The knife-fuse switch 302 can be controlled by a third measurement and control module 305, and the third measurement and control module 305 can transmit a control signal to a switch control contact of the knife-fuse switch 302, so that the third measurement and control module 305 manages and controls on and off of the knife-fuse switch 302. After data acquisition and/or conversion are completed, the third measurement and control module 305 may be connected to the network and the first human-machine interface 107 through the first communication module 106 of the inlet cabinet 100 (a digital communication module, i.e., the capacitance compensation cabinet 300 and the inlet cabinet 100 share one communication module, which is simple, efficient, and low in cost), so as to implement network management and control and direct observation and control management of the capacitance compensation cabinet 300 by using the human-machine interface of the inlet cabinet 100.

As shown in fig. 12-13, a reactive power compensation cabinet 400 (also called an SVG cabinet, or static var generator, SVG for short) includes a fourth incoming line 401 connected to the first main bus 103, a fourth circuit breaker 402 connected to the fourth incoming line 401, an SVG module 403 connected to the fourth circuit breaker 402, and a fourth measurement and control module 405 for measuring a fourth connection line 404 between the fourth circuit breaker 402 and the SVG module 403; the SVG module 403 includes a first inductor 4031 connected to the fourth circuit breaker 402, a first IGBT 4032 (Insulated Gate Bipolar Transistor) connected to the first inductor 4031, and a support capacitor 4033 connected to the first IGBT (for example, the support capacitor may be connected in parallel to a dc terminal of the first IGBT, and an ac terminal of the first IGBT is connected to the first main bus 103). The fourth measurement and control module 405 includes a reactive power cabinet communication interface 4051 (i.e., the reactive power compensation cabinet 400 can share a communication module with the inlet wire cabinet 100 so that the overall structure is simple and efficient, and the cost is lower), a fourth current measurement loop 4052, a fourth voltage measurement loop 4053, and a fourth temperature measurement loop 4054, which are connected to the first communication module 106. The fourth current measurement circuit 4052 measures the current of the fourth connection line 404 by using a current transformer; a fourth voltage measurement circuit 4053 is interconnected via a fuse with the fourth connection line 404 for measuring a voltage; the fourth temperature measurement circuit 4054 measures the temperature of the fourth connection line 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 fourth breaker 402 is connected to the first main bus 103, and the lower port is connected to the SVG module 403. The SVG module 403 may control the reactive power generation amount according to the collected voltage of the first main bus 103 and the load current collected through the current transformer of the first main bus 103, thereby implementing control of the power factor of the incoming line power. Data of the SVG cabinet 400 may be measured by a fourth measurement and control module 405. For example, the current of the SVG cabinet 400 may be collected by a current transformer at the lower port of the fourth circuit breaker 402 and transmitted to the fourth measurement and control module 405. The voltage of the SVG cabinet 400 can collect the lower port voltage of the fourth circuit breaker 402 and is transmitted to the fourth measurement and control module 405 through the fuse. The temperature of the fourth circuit breaker 402 may be collected by a temperature sensor (e.g., a digital temperature sensor) and communicated to the fourth measurement and control module 405. The switch state of the fourth circuit breaker 402 can collect the auxiliary contact signal of the circuit breaker and transmit it to the fourth measurement and control module 405. The fourth circuit breaker 402 may be controlled by a fourth measurement and control module 405. The fourth measurement and control module 405 may transmit the control signal to the circuit breaker control contact of the fourth circuit breaker 402, so that the fourth circuit breaker 402 of the SVG cabinet is managed and controlled by the fourth measurement and control module 405. The fourth measurement and control module 405 may be connected to the network and the first human-machine interface 107 through the first communication module 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 a human-machine interface of the inlet cabinet 100 (i.e., the SVG cabinet 400 and the inlet cabinet 100 share a human-machine interface, which is simple, efficient, and low in cost).

As shown in fig. 14-15, the Active Filter cabinet 500 (also called an APF cabinet, an Active Power Filter, referred to as APF for filtering) includes a fifth incoming line 501 connected to the first main bus 103, a fifth breaker 502 connected to the fifth incoming line 501, an APF module 503 connected to the fifth breaker 502, and a fifth measurement and control module 505 for measuring a fifth connection line 504 between the fifth breaker 502 and the APF module 503; the APF module 503 includes a second inductor 5031 connected to the fifth circuit breaker 502, a second IGBT 5032 connected to the second inductor, and a support capacitor 5033 connected to the second IGBT 5032 (for example, the support capacitor may be connected in parallel to the dc terminal of the second IGBT, and the ac terminal of the second IGBT is connected to the first main bus 103). The fifth measurement and control module 505 includes an active cabinet communication interface 5051 connected to the first communication module 106 (i.e., the active filter cabinet 500 and the inlet cabinet 100 may share one communication module, so that the overall structure is simple and efficient, and the cost is lower), a fifth current measurement loop 5052, a fifth voltage measurement loop 5053, and a fifth temperature measurement loop 5054. The fifth current measurement circuit 5052 measures the current of the fifth connection line 504 by using a current transformer; a fifth voltage measurement circuit 5053 is interconnected with the fifth connection 504 via a fuse for measuring voltage; the fifth temperature measurement circuit 5054 measures the temperature of the fifth connection 504 using a temperature sensor.

As an example, an APF cabinet (Active Power Filter, APF for short) may be a control node of harmonic current of a Power inlet line of a low-voltage switchgear assembly. The upper port of the fifth breaker 502 is connected to the first main bus 103, and the lower port is connected to the APF module. The APF module controls the amount of reverse harmonic current generation according to the collected voltage and current of the fifth connection line 504, thereby filtering the load harmonic current. The data of the APF module may be measured by the fifth instrumentation module 505. For example, the current of the APF module may be collected by a current transformer at the lower port of the fifth circuit breaker 502 and transmitted to the fifth measurement and control module 505. The voltage can be collected at the lower port of the fifth circuit breaker 502 and transmitted to the fifth measurement and control module 505 through the fifth circuit breaker 502. The temperature of the fifth circuit breaker 502 may be collected by a temperature sensor (e.g., a digital temperature sensor) and communicated to the fifth measurement and control module 505. The switch state of the fifth circuit breaker 502 can collect its auxiliary contact signal and transmit to the fifth measurement and control module 505. The fifth circuit breaker 502 may be controlled by the fifth measurement and control module 505, for example, the fifth measurement and control module 505 may transmit a control signal to a control contact of the fifth circuit breaker 502, so that the fifth circuit breaker 502 is managed and controlled by the fifth measurement and control module 505. After data collection and/or conversion is completed, the fifth measurement and control module 505 may connect to the network and the first human-machine interface 107 through the first communication module 106 of the inlet cabinet 100, so as to implement network management and control and direct observation and control management of the APF cabinet by using the human-machine interface of the inlet cabinet 100 (i.e., the APF cabinet and the inlet cabinet 100 share the human-machine interface, which is simple, efficient, and low in cost).

As shown in fig. 16-17, a buscouple cabinet 600 (also called a buscouple cabinet, a buscouple breaking cabinet, for connecting two sections of buses) is used for connecting the first main bus 103 and the second main bus 601, the buscouple cabinet 600 includes a sixth incoming line 602 connected to the first main bus 103, a sixth breaker 603 connected to the sixth incoming line 602 (the detailed structure of the sixth breaker 603 is shown in the upper right of fig. 17, which is a diagram of an electrical diagram), and a sixth measurement and control module 605 for measuring a sixth connecting line 604 between the sixth breaker 603 and the second main bus 601, the sixth measurement and control module 605 includes a buscouple cabinet communication interface 6051 connected to the first communication module 106 (i.e. the buscouple cabinet 600 may share a communication module with the incoming line cabinet 100, so that the overall structure is simple and the cost is low), a sixth current measurement circuit 6052, a sixth voltage measurement circuit 6053, and a sixth temperature measurement circuit 6054. The sixth current measurement circuit 6052 measures the current of the sixth connection line 604 by using a current transformer; a sixth voltage measurement circuit 6053 interconnected with said sixth connection 604 via a fuse for measuring a voltage; and a sixth temperature measurement circuit 6054 uses a temperature sensor to measure the temperature of the sixth connection 604.

As an example, the master cabinet 600 may be a tie management node of a dual power supply of a low-voltage switchgear assembly. The upper port of the sixth breaker 603 may be connected to the first main bus 103 (one bus), the lower port is connected to the second main bus 601 (the other bus), and the data of the buscouple cabinet 600 may be measured by the sixth measurement and control module 605. For example, the current of the buscouple cabinet 600 may be collected by a lower port current transformer of the sixth circuit breaker 603, and transmitted to the sixth measurement and control module 605. The node voltage of the busbar 600 can collect the lower port voltage of the sixth circuit breaker 603, and the lower port voltage is transmitted to the sixth measurement and control module 605 through the fuse. The temperature of the sixth circuit breaker 603 may be collected by a temperature sensor and communicated to a sixth measurement and control module 605. The switching state of the sixth circuit breaker 603 may collect an auxiliary contact signal of the sixth circuit breaker 603 and transmit the auxiliary contact signal to the sixth measurement and control module 605. The sixth circuit breaker 603 may be controlled by a sixth measurement and control module 605. For example, the sixth measurement and control module 605 may monitor the incoming line voltage status of the two power sources according to the collected incoming line voltages of the two power sources (i.e., the first main bus 103 and the second main bus 601), so as to issue a connection control command and control whether to connect (i.e., connect or disconnect) the sixth circuit breaker 603. After data collection and/or conversion is completed, the sixth measurement and control module 605 may connect to the network and the first human-machine interface 107 through the first communication module 106 of the inlet cabinet 100, so as to implement network management and control and direct observation and control management of the buscouple cabinet 600 by using the human-machine interface of the inlet cabinet 100 (i.e., the buscouple cabinet 600 and the inlet cabinet 100 share a human-machine interface, which is simple, efficient and low in cost).

As an example, regarding the usage of the master gang cabinet 600, the conventional power supply is a two-way power supply, and when one of the two power supplies is powered off due to a fault or maintenance, the two power distribution cabinets can automatically communicate through the master gang cabinet 600, so as to maintain continuous power supply. The busbar cabinet 600 may have three operating states, for example, 1) to operate independently, at this time, the two-way power supply is normal, the interconnection is disconnected, the two-way bus (i.e., the first main bus 103 and the second main bus 601) is disconnected, and the two-way feed-out loop operates independently and is supplied with power by two transformers respectively. 2) And the two buses are connected together to work, and all the feed-out loops are supplied with power by the second transformer. 3) And the two feed-out loops are connected to work together, and all the feed-out loops are supplied with power by the first transformer.

According to an exemplary embodiment of the invention, at least one of the following items can also be displayed on the first human-machine interface: a capacitor box dynamic configuration diagram (not shown), a reactive box dynamic configuration diagram 111 (as shown in fig. 8, that is, the reactive box dynamic configuration diagram is displayed on the inlet box 100, which is convenient for integration and viewing and has lower cost), and a buscouple box dynamic configuration diagram 112 (as shown in fig. 8, that is, the buscouple box dynamic configuration diagram is displayed on the inlet box 100, which is convenient for integration and viewing and has lower cost).

The capacitance compensation cabinet comprises a capacitance cabinet dynamic configuration diagram, a capacitance compensation cabinet and a control system, wherein the capacitance cabinet dynamic configuration diagram shows an electrical schematic diagram and a real-time working state of the capacitance compensation cabinet in a dynamic diagram form; the electric schematic diagram of the capacitance compensation cabinet shows the switch states of the knife-shaped fuse switch in different colors; the real-time working state of the capacitance compensation cabinet comprises at least one of the following items: split-phase current, active power and temperature in the cabinet.

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; the electrical schematic diagram of the reactive compensation cabinet shows the switch state of the fourth 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.

The dynamic configuration diagram of the bus coupling cabinet shows an electrical schematic diagram and a real-time working state of the bus coupling cabinet in a dynamic diagram form; the electrical schematic diagram of the busbar cabinet shows the switch state of the sixth circuit breaker by different colors; the real-time working state of the master coupler cabinet comprises at least one of the following items: split-phase current, active power and temperature in the cabinet.

It can be understood that, because the invention innovatively uses the way of the dynamic configuration diagram of the capacitor cabinet, the dynamic configuration diagram of the reactive power cabinet and the dynamic configuration diagram of the bus coupler cabinet to respectively display the electric schematic diagram and the real-time working state of the capacitor compensation cabinet, the reactive power compensation cabinet and the bus coupler cabinet, the monitoring is not needed by manual meter reading record, the human-computer interaction is very convenient and intuitive, the performance of each cabinet in the low-voltage distribution switch system is greatly improved in the aspect of the human-computer interaction capability, the running condition of each 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 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 functions: the online carbon emission statistical method comprises an online data display function, an online dynamic configuration diagram display function, an online carbon emission statistical function and an online energy flow diagram display function.

The online data display function 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, and the like): 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 function can guarantee the overall safe operation of the power distribution switch system, for example, the online data display function can monitor all electric quantity data, electric fire data, energy consumption data, electric energy quality data and communication networks of power inlet line control nodes of a low-voltage power distribution system, count and analyze collected data, and detect abnormal classification early warning and alarming, so that the aims of actively preventing and realizing the safe operation of a power distribution and transformation system are fulfilled. In addition, the online data display function can also comprise the display of functions such as 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 function is to display 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.

Wherein the online carbon emission statistical function is used for counting and displaying at least one of the following items in the applied area of the low-voltage power distribution switch system based on the Internet of things: peak flat valley electric quantity proportion condition, energy consumption statistic condition, item energy consumption condition and classification energy consumption proportion condition. Wherein the online energy flow graph presentation function is to present at least one of the following items 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.

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 matching 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 distribution switch system based on the internet of things is an intelligent power distribution cabinet based on 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 intelligent power distribution cabinet has the functions of precise measurement and control and internet and adopts a human-computer interface for interactive display, so that the intelligent power distribution cabinet has the capability of monitoring all-node online data. The low-voltage distribution switch system integrates full-electricity measurement, switching value measurement, electricity 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 system is a system data acquisition and distribution management and control terminal. The low-voltage distribution switch system 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 provides 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 invention, 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 modules and functions described in this disclosure may be performed, at least in part, by one or more hardware logic components. 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. The "signals", "control signals" described in this disclosure may be implemented by computer program instructions, such as instructions or commands stored on a computer readable storage medium. The computer-readable program instructions described herein may be downloaded from a computer-readable storage medium to a respective computing/processing device, or to an external computer or external storage device via a network, such as the internet, a local area network, a wide area network, and/or a wireless network. The network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers and/or edge servers. The network adapter card or network interface in each computing/processing device receives computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in a computer-readable storage medium in the respective computing/processing device.

The computer program instructions for carrying out operations of the present disclosure may be assembler instructions, Instruction Set Architecture (ISA) instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source or object code written in any combination of one or more programming languages, including an object oriented programming language such as Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The computer-readable program instructions may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider). In some embodiments, by utilizing the state information of computer-readable program instructions to personalize an electronic circuit, such as a programmable logic circuit, a Field Programmable Gate Array (FPGA), or a Programmable Logic Array (PLA), the electronic circuit can execute the computer-readable program instructions to implement the respective functions of the present invention.

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

1. The utility model provides a low pressure distribution switch system based on thing networking which characterized in that includes:

the incoming line cabinet comprises a first incoming line for receiving input of a low-voltage power supply, a first breaker connected with the first incoming line, a first main bus connected with the first breaker, a first measurement and control module for measuring the first main bus, a first communication module for transmitting a measurement result obtained by the first measurement and control module to a network end, and a first human-computer interface for interacting with an operator; one end of the first breaker is connected with the first incoming line, and the other end of the first breaker is connected with the first main bus;

the outgoing line cabinet comprises a second incoming line connected with the first main bus, a second breaker connected with the second incoming line, a feeding-out line connected with the second breaker, a second measurement and control module used for measuring the feeding-out line, a second communication module used for transmitting a measurement result obtained by the second measurement and control module to the network end, and a second human-computer interface interacted with an operator; one end of the second circuit breaker is connected with the second incoming line, and the other end of the second circuit breaker is connected with the outgoing line;

the capacitance compensation cabinet comprises a third incoming line connected with the first main bus, a knife-fuse switch connected with the third incoming line, a capacitance module connected with the knife-fuse switch line, and a third measurement and control module used for measuring a third connecting line between the knife-fuse switch and the capacitance module; wherein the capacitance module comprises a power capacitor; the third measurement and control module comprises a capacitor cabinet communication interface, a third current measurement circuit, a third voltage measurement circuit and a third temperature measurement circuit, wherein the capacitor cabinet communication interface, the third current measurement circuit, the third voltage measurement circuit and the third temperature measurement circuit are connected with the first communication module;

the reactive compensation cabinet comprises a fourth incoming line connected with the first main bus, a fourth circuit breaker connected with the fourth incoming line, an SVG module connected with the fourth circuit breaker, and a fourth measurement and control module used for measuring a fourth connecting line between the fourth circuit breaker and the SVG module; the SVG module comprises a first inductor connected with the fourth circuit breaker, a first IGBT connected with the first inductor and a support capacitor connected with the first IGBT; the fourth measurement and control module comprises a reactive cabinet communication interface, a fourth current measurement circuit, a fourth voltage measurement circuit and a fourth temperature measurement circuit, wherein the reactive cabinet communication interface, the fourth current measurement circuit, the fourth voltage measurement circuit and the fourth temperature measurement circuit are connected with the first communication module;

the active filter cabinet comprises a fifth incoming line connected with the first main bus, a fifth breaker connected with the fifth incoming line, an APF module connected with the fifth breaker, and a fifth measurement and control module used for measuring a fifth connecting line between the fifth breaker and the APF module; the APF module comprises a second inductor connected with the fifth circuit breaker, a second IGBT connected with the second inductor and a support capacitor connected with the second IGBT; the fifth measurement and control module comprises an active cabinet communication interface, a fifth current measurement circuit, a fifth voltage measurement circuit and a fifth temperature measurement circuit, wherein the active cabinet communication interface, the fifth current measurement circuit, the fifth voltage measurement circuit and the fifth temperature measurement circuit are connected with the first communication module; and

the busbar joint cabinet is used for connecting the first main bus and the second main bus, the busbar joint cabinet comprises a sixth incoming line connected with the first main bus, a sixth circuit breaker connected with the sixth incoming line, and a sixth measurement and control module used for measuring a sixth connecting line between the sixth circuit breaker and the second main bus, and the sixth measurement and control module comprises a busbar joint cabinet communication interface connected with the first communication module, a sixth current measurement loop, a sixth voltage measurement loop and a sixth temperature measurement loop;

the first human-computer interface can display a dynamic configuration diagram of the incoming line cabinet so as to display an electrical schematic diagram and a real-time working state of the incoming line cabinet in a dynamic diagram form; the second human-computer interface can display a dynamic configuration diagram of the line cabinet so as to display an electrical schematic diagram and a real-time working state of the line cabinet in a dynamic diagram form;

wherein, the electrical schematic diagram of the inlet cabinet shows the switch state of the first circuit breaker by different colors; the real-time working state of the incoming cabinet comprises at least one of the following items: split-phase current, active power and temperature in the cabinet; the electrical schematic diagram of the outlet cabinet shows the switch states of the second circuit breaker by different colors; the real-time working state of the outgoing line cabinet comprises at least one of the following items: split-phase current, active power and temperature in the cabinet;

the first human-computer interface can also display a dynamic configuration diagram of the capacitance compensation cabinet so as to display an electrical schematic diagram and a real-time working state of the capacitance compensation cabinet in a dynamic diagram form; the electrical schematic diagram of the capacitance compensation cabinet shows the switch state of the knife-shaped fused switch by different colors; the real-time working state of the capacitance compensation cabinet comprises at least one of the following items: split-phase current, active power and temperature in the cabinet;

the first human-computer interface can also display a dynamic configuration diagram of the reactive power compensation cabinet so as to display an electrical schematic diagram and a real-time working state of the reactive power compensation cabinet in a dynamic diagram form; the electrical schematic diagram of the reactive compensation cabinet shows the switch state of the fourth 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;

the first human-computer interface can also display a dynamic configuration diagram of the master cabinet so as to display an electrical schematic diagram and a real-time working state of the master cabinet in a dynamic diagram form; the electrical schematic diagram of the busbar cabinet shows the switch state of the sixth circuit breaker by different colors; the real-time working state of the master coupler cabinet comprises at least one of the following items: split-phase current, active power and temperature in the cabinet.

2. The internet of things-based low-voltage distribution switch system according to claim 1, wherein the switch state of the first circuit breaker comprises a closing state represented by red and an opening state represented by green;

the switching states of the second circuit breaker include a closing state represented by red and an opening state represented by green.

3. The internet of things-based low-voltage distribution switch system according to claim 1 or 2, wherein the first measurement and control module comprises at least one of:

the first current measurement loop is used for measuring the current of the first main bus by adopting a current transformer;

a first voltage measurement circuit interconnected with the first main bus via a fuse for measuring voltage;

and the first temperature measurement loop measures the temperature of the first main bus by adopting a temperature sensor.

4. The internet of things-based low-voltage distribution switch system according to claim 1 or 2, wherein the second measurement and control module comprises at least one of:

the second current measurement loop is used for measuring the current of the feed-out line by adopting a current transformer;

a second voltage measurement circuit interconnected with the feed-out line via a fuse for measuring voltage;

the second temperature measurement loop is used for measuring the temperature of the feed-out wire by adopting a temperature sensor;

and the residual current transformer is used for measuring the residual current of the feed-out line.

5. The internet of things based low-voltage electric switch system according to claim 1 or 2, wherein the first human machine interface or the second human machine interface 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.

6. The internet-of-things-based low-voltage distribution switch system according to claim 1 or 2, wherein the first communication module is connected with a line cabinet communication interface of the first measurement and control module through an RS485 interface, the first measurement and control module receives a first control signal which is transmitted from the network terminal through the first communication module, and the first control signal comprises a signal for controlling the on-off state of the first circuit breaker;

the second communication module is connected with an outlet cabinet communication interface of the second measurement and control module through an RS485 interface, the second measurement and control module receives a second control signal which is sent from the network end and is transmitted through the second communication module, and the second control signal comprises a signal for controlling the on-off state of the second circuit breaker;

the first communication module is connected with the first 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;

and the second communication module is connected with the second 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.

7. The internet of things-based low-voltage distribution switch system according to claim 1 or 2, wherein the network further comprises a server, which comprises at least one of the following functions:

an online data presentation function that presents at least one of the following data for each of the cabinets: 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, 3-31 th harmonic current split-phase histogram;

the online dynamic configuration diagram display function is used for displaying the electrical schematic diagram and the real-time working state of each cabinet 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;

an online carbon emission statistical function for counting and displaying at least one of the following in an area where the internet of things based low voltage distribution switch system 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 function that presents, in energy flow graph form, at least one of: energy flow direction, node power supply data, load energy consumption data, power transformation loss data and transmission loss data.