An intelligent low-voltage distribution transformer integrated distribution box

Abstract

The present invention discloses an intelligent low-voltage distribution transformer integrated distribution box, comprising a box body, and also comprising a power supply and control circuit system, wherein the power supply and control circuit system is arranged in the box body; the power supply and control circuit system comprises a primary circuit composed of an intelligent circuit breaker and a reactive power compensation control terminal, which is used to supply power to a load; the intelligent circuit breaker and the reactive power compensation control terminal monitor the equipment status and measure and control electrical protection, and the power supply and control circuit system also comprises a temperature concentrator for monitoring the environment, and a network high-speed dome camera for video monitoring and security monitoring; the intelligent low-voltage distribution transformer integrated distribution box comprises a box body, and also comprises a power supply and control circuit system, wherein the power supply and control circuit system comprises a primary circuit composed of an intelligent circuit breaker and a reactive power compensation control terminal, which is used to supply power to a load; the intelligent circuit breaker and the reactive power compensation control terminal monitor the equipment status and measure and control electrical protection, and the power supply and control circuit system also comprises a temperature concentrator for monitoring the environment, and a network high-speed dome camera for video monitoring and security monitoring; the intelligent, visualized, automated, interactive and other functions of status monitoring of equipment in a bench transformer, real-time monitoring of the environment, safe control of behavior, and efficient support of social services can be realized, and the functions are higher in safety, reliability and intelligence.

Description

Technical Field

[0001] The invention relates to the field of electric power distribution, in particular to an intelligent low-voltage distribution transformer integrated distribution box. Background Art

[0002] In recent years, power grid companies have proposed a reform and development strategy to transform into smart grid operators, energy industry value chain integrators, and energy ecosystem service providers, and have orderly promoted the application of intelligent technologies in distribution networks. They require the collection of configurations that include five major functions: equipment status monitoring, electrical protection measurement and control, video monitoring, environmental monitoring, and security monitoring. They have promoted the construction of high-reliability smart grid power supply demonstration areas and realized intelligent patrol and maintenance.

[0003] The rack-type low-voltage distribution transformer integrated distribution box is an important component of the distribution network, accounting for a large proportion of the distribution network. However, the current low-voltage distribution transformer integrated distribution box only has metering data uploaded to the power grid company's platform through TTU. The power grid company is basically blind to the status of the remote low-voltage distribution transformer integrated distribution box equipment and is unaware of the operating status of each component of the low-voltage distribution transformer integrated distribution box. Summary of the invention

[0004] Based on the deficiencies in the prior art mentioned in the above background technology, the present invention provides an intelligent low-voltage distribution transformer integrated distribution box.

[0005] The present invention overcomes the above technical problems by adopting the following technical solutions, specifically:

[0006] An intelligent low-voltage distribution transformer integrated distribution box comprises a box body and a power supply and control circuit system, wherein the power supply and control circuit system is arranged in the box body; the power supply and control circuit system comprises a primary circuit composed of an intelligent circuit breaker and a reactive power compensation control terminal, and is used to supply power to a load;

[0007] The intelligent circuit breaker and reactive power compensation control terminal monitor the equipment status and measure and control electrical protection;

[0008] The power supply and control circuit system also includes a temperature concentrator for monitoring the environment, and a network high-speed dome camera for video monitoring and security monitoring.

[0009] As a further solution of the present invention: the intelligent low-voltage distribution transformer integrated distribution box is installed below the substation transformer, and a contact temperature sensor and an oil temperature monitoring device for the oil transformer are installed in the substation transformer;

[0010] The contact temperature sensor and the oil temperature monitoring device communicate with the temperature concentrator via RS485 serial bus signals.

[0011] As a further solution of the present invention: the intelligent low-voltage distribution transformer integrated distribution box also includes an intelligent gateway installed on the box body, and a TTU is arranged on the substation transformer. The intelligent gateway collects signals from the intelligent circuit breaker, reactive power compensation control terminal, temperature concentrator, TTU, and network high-speed dome camera and uploads them to the cloud platform.

[0012] As a further solution of the present invention: the box is provided with a low-voltage side outlet for electrically connecting the substation transformer, the substation transformer is electrically connected to a high-voltage disconnector through a drop-out fuse, and the high-voltage disconnector is electrically connected to a high-voltage incoming line;

[0013] A lightning arrester is connected between the drop-out fuse and the substation transformer, and a low-voltage lead-out line for connecting the user load is arranged under the box.

[0014] As a further solution of the present invention: the intelligent gateway is provided with an RS485 serial bus, an RJ45 Ethernet, and a hard contact signal interface for transmission to the cloud platform, and the intelligent low-voltage distribution transformer integrated distribution box constructs a Modbus communication protocol with the cloud platform through the intelligent gateway.

[0015] As a further solution of the present invention: the box body has four compartments, including an incoming line and metering room electrically connected to the transformer of the substation area through the low-voltage side outgoing line, an incoming line switch room, a reactive power compensation room, and an outgoing line switch room;

[0016] The incoming line and metering room are equipped with TTU, metering transformer, measuring transformer and intelligent gateway, which are interconnected to form a first path, and the first path is electrically connected to the low-voltage side outgoing line and the incoming line switch room.

[0017] As a further solution of the present invention: an incoming line isolating switch and an incoming line circuit breaker are installed in the incoming line switch room, and the incoming line isolating switch is connected with the incoming line circuit breaker to form a second path and electrically connected to the first path in the incoming line and metering room.

[0018] As a further solution of the present invention: the reactive power compensation room is equipped with a temperature concentrator, a secondary power switch, a compensation circuit breaker, a reactive power compensation control terminal, a reactive power compensation miniature circuit breaker, a reactive power compensation composite switch, and a compensation capacitor;

[0019] The temperature concentrator, the secondary power switch, the compensation circuit breaker, the reactive compensation control terminal, the reactive compensation miniature circuit breaker, the reactive compensation composite switch, and the compensation capacitor are interconnected to form a third path, and the third path is electrically connected to the second path.

[0020] As a further solution of the present invention: an intelligent circuit breaker and a secondary power supply module are installed in the outlet switch room, and the intelligent circuit breaker and the secondary power supply module are interconnected to form a fourth path, one end of the fourth path is electrically connected to the third path, and the other end thereof is electrically connected to the low-voltage lead-out line.

[0021] After adopting the above structure, the present invention has the following advantages compared with the prior art: this technical solution can realize the intelligent, visual, automated, interactive and other functions of status monitoring of equipment inside the test bench, real-time monitoring of the environment, safe control of behavior, and efficient support of social services, with higher security, better reliability and higher intelligence. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A topological diagram of an intelligent low-voltage distribution transformer integrated distribution box provided in an embodiment of the present application;

[0023] Figure 2 A schematic diagram of the front installation of an intelligent low-voltage distribution transformer integrated distribution box provided in an embodiment of the present application;

[0024] Figure 3 A schematic diagram of the side installation of an intelligent low-voltage distribution transformer integrated distribution box provided in an embodiment of the present application;

[0025] Figure 4 A schematic diagram of the intelligent gateway function of an intelligent low-voltage distribution transformer integrated distribution box provided in an embodiment of the present application;

[0026] Figure 5 A schematic diagram of the intelligent power distribution function of an intelligent low-voltage distribution transformer integrated distribution box provided in an embodiment of the present application;

[0027] Figure 6 A functional schematic diagram of a reactive power compensation control terminal of an intelligent low-voltage distribution transformer integrated distribution box provided in an embodiment of the present application;

[0028] Figure 7 A functional schematic diagram of a temperature concentrator of an intelligent low-voltage distribution transformer integrated distribution box provided in an embodiment of the present application;

[0029] Figure 8 A schematic diagram of a box body of an intelligent low-voltage distribution transformer integrated distribution box provided in an embodiment of the present application;

[0030] Fig. 9 A schematic diagram of the front installation of an intelligent low-voltage distribution transformer integrated distribution box provided in an embodiment of the present application;

[0031] Fig.10 A schematic diagram of the installation on the back of an intelligent low-voltage distribution transformer integrated distribution box provided in an embodiment of the present application.

[0032] In the figure, 1-high voltage incoming line; 2-high voltage isolating switch; 3-drop-out fuse; 4-lightning arrester; 5-substation transformer; 51-contact temperature sensor; 52-oil temperature monitoring device for oil transformer; 6-cabinet; 61-incoming line and metering room; 62-incoming line switch room; 63-reactive power compensation room; 64-outgoing line switch room. DETAILED DESCRIPTION

[0033] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly and comprehensively understood.

[0034] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0035] See also Figures 1 to 10 In an embodiment of the present invention, an intelligent low-voltage distribution transformer integrated distribution box includes a box body 6, and also includes a power supply and control circuit system, and the power supply and control circuit system is arranged in the box body 6; the power supply and control circuit system includes a primary circuit composed of an intelligent circuit breaker and a reactive power compensation control terminal, which is used to supply power to a load;

[0036] The intelligent circuit breaker and reactive power compensation control terminal monitor the equipment status and measure and control electrical protection;

[0037] The power supply and control circuit system also includes a temperature concentrator for monitoring the environment, and a network high-speed dome camera for video monitoring and security monitoring;

[0038] In the specific scheme of this embodiment, the primary circuit composed of intelligent power distribution and intelligent reactive power compensation of the intelligent circuit breaker supplies power to the load. The intelligent power distribution and intelligent reactive power compensation include equipment status monitoring and electrical protection measurement and control functions; a temperature concentrator is installed to realize environmental monitoring; and a network high-speed dome camera is installed to realize video monitoring and security monitoring functions.

[0039] In one embodiment of the present invention, the intelligent low-voltage distribution transformer integrated distribution box is installed below the substation transformer 5, and the substation transformer 5 is installed with a contact temperature sensor 51 and an oil temperature monitoring device 52;

[0040] The contact temperature sensor 51 and the oil temperature monitoring device 52 communicate with the temperature concentrator via RS485 serial bus signals;

[0041] In the specific scheme of this embodiment, the intelligent low-voltage distribution transformer integrated distribution box is installed under the transformer in the substation area to distribute electric energy and perform reactive power compensation. For example, the entire transformer substation area is monitored by the intelligent low-voltage distribution transformer integrated distribution box, and a contact temperature sensor 51 is installed on the low-voltage side contact of the transformer to monitor the temperature of the low-voltage side contact of the transformer, which is wirelessly transmitted to the temperature concentrator of the intelligent low-voltage distribution transformer integrated distribution box; the oil temperature monitoring device 52 is used to monitor the oil temperature, oil pressure, oil level, etc. of the transformer, and the transmission is transmitted to the temperature concentrator of the intelligent low-voltage distribution transformer integrated distribution box through 485 communication.

[0042] In another embodiment of the present invention, the intelligent low-voltage distribution transformer integrated distribution box further includes an intelligent gateway installed on the box body 6, and a distribution transformer monitoring terminal (TTU) is provided on the substation transformer 5. The intelligent gateway collects signals from the intelligent circuit breaker, reactive power compensation control terminal, temperature concentrator, TTU, and network high-speed dome camera and uploads them to the cloud platform;

[0043] In the specific scheme of this embodiment, intelligent gateways, temperature concentrators, intelligent distribution circuit breakers, network dome cameras and other equipment are added, and the communication functions of TTU and reactive power compensation control terminals are added to meet the requirements of power grid companies for intelligent low-voltage distribution and integrated distribution boxes.

[0044] In another embodiment of the present invention, the box body 6 is provided with a low-voltage side outlet for electrically connecting the substation transformer 5, the substation transformer 5 is electrically connected to the high-voltage disconnector 2 through the drop-out fuse 3, and the high-voltage disconnector 2 is electrically connected to the high-voltage incoming line 1;

[0045] A lightning arrester 4 is connected between the drop-out fuse 3 and the substation transformer 5, and a low-voltage lead-out line for connecting the user load is provided under the box 6;

[0046] In the specific scheme of this embodiment, for example, the 10kV high voltage is connected to the high voltage disconnector 2 through the incoming line 1, and then led to the drop-out fuse 3, which is protected by the lightning arrester 4, and led to the 10 / 0.4kV transformer. The low-voltage side outgoing line is connected to the intelligent low-voltage distribution transformer integrated distribution box for distributing electric energy and reactive power compensation. The outgoing line is a low-voltage line, which supplies power to the user's load.

[0047] In another embodiment of the present invention, the intelligent gateway is provided with an RS485 serial bus, an RJ45 Ethernet, and a hard contact signal interface for transmission to the cloud platform, and the intelligent low-voltage distribution transformer integrated distribution box constructs a Modbus communication protocol with the cloud platform through the intelligent gateway;

[0048] In the specific scheme of this embodiment, the intelligent gateway is responsible for collecting signals from intelligent distribution circuit breakers, reactive power compensation control terminals, TTUs, temperature concentrators, and network high-speed dome cameras, and uploading them to the cloud platform. The intelligent gateway has interfaces such as RS485, RJ45 Ethernet, and several hard contact signals. The Modbus communication protocol is used inside the intelligent low-voltage distribution transformer integrated distribution box 6, and the Internet of Things platform is uploaded to the cloud platform.

[0049] In another embodiment of the present invention, the box 6 has four compartments, including an incoming line and metering room 61 electrically connected to the transformer 5 of the substation area through the low-voltage side outgoing line, an incoming line switch room 62, a reactive power compensation room 63, and an outgoing line switch room 64;

[0050] The incoming line and metering room 61 is equipped with a TTU, a metering transformer, a measuring transformer, and an intelligent gateway, and the TTU, the metering transformer, the measuring transformer, and the intelligent gateway are interconnected to form a first path, and the first path is electrically connected to the low-voltage side outgoing line and the incoming line switch room 62;

[0051] In the specific scheme of this embodiment, the four compartments are electrically connected in sequence, and respectively play the functions of metering monitoring, power switch control, reactive power compensation, and power transmission switch control.

[0052] In another embodiment of the present invention, an incoming line isolating switch and an incoming line circuit breaker are installed in the incoming line switch room 62, and the incoming line isolating switch is connected to the incoming line circuit breaker to form a second passage and electrically connected to the first passage in the incoming line and metering room 61;

[0053] In the specific scheme of this embodiment, the incoming line isolating switch and the incoming line circuit breaker cooperate to control and protect the current and voltage incoming lines introduced from the incoming line and metering chamber 61.

[0054] In another embodiment of the present invention, the reactive power compensation chamber 63 is equipped with a temperature concentrator, a secondary power switch, a compensation circuit breaker, a reactive power compensation control terminal, a reactive power compensation miniature circuit breaker, a reactive power compensation composite switch, and a compensation capacitor;

[0055] The temperature concentrator, the secondary power switch, the compensation circuit breaker, the reactive compensation control terminal, the reactive compensation miniature circuit breaker, the reactive compensation composite switch, and the compensation capacitor are interconnected to form a third path, and the third path is electrically connected to the second path;

[0056] In the specific scheme of this embodiment, a reactive power compensation control terminal is installed to monitor active power, reactive power, power factor, etc., and can set and query capacitor configuration and settable switching strategies; monitor the on and off status and alarm status of the composite switch, etc.

[0057] In another embodiment of the present invention, an intelligent circuit breaker and a secondary power supply module are installed in the outgoing switch room 64, and the intelligent circuit breaker and the secondary power supply module are interconnected to form a fourth path, one end of the fourth path is electrically connected to the third path, and the other end thereof is electrically connected to the low-voltage lead-out line.

[0058] In summary, the intelligent low-voltage distribution transformer integrated distribution box consists of intelligent power distribution and intelligent reactive power compensation of intelligent circuit breakers to form a primary circuit to supply power to the load. Intelligent power distribution and intelligent reactive power compensation include equipment status monitoring and electrical protection measurement and control functions; install temperature concentrators to realize environmental monitoring; install network high-speed dome cameras to realize video monitoring and security monitoring functions; the intelligent low-voltage distribution transformer integrated distribution box distributes electric energy and performs reactive power compensation. At the same time, it can collect relevant information of the contact temperature sensor and oil temperature monitoring device installed on the transformer; collect video signals of network high-speed dome cameras; intelligent power distribution uses intelligent circuit breakers, which, in addition to completing the function of distributing electric energy, also have the function of collecting three-phase voltage, current, zero-sequence current, active power, reactive power, power factor, etc.; it can control the on and off of the switch by comparing the pre-set threshold value to realize the protection and alarm function; collect the on and off status of the switch; reactive power compensation control terminal can monitor active power, reactive power, power factor, etc., and can set and query capacitor configuration and configurable switching strategy; monitor the on and off status and alarm status of the composite switch, etc.

[0059] The network high-speed dome camera can realize the situation within the range of the platform, the activities of personnel, and the pointer meter, signal light and switch position change signal of the equipment, so as to realize the active recording, prediction and alarm of the distribution room environment and equipment status.

[0060] The temperature concentrator can monitor the temperature and humidity in the integrated distribution box, monitor the oil temperature, oil pressure, oil level, etc. of the transformer, and monitor the temperature of the A, B, C, and N phase contacts on the low-voltage side of the transformer. The temperature and humidity in the integrated distribution box are at least 2 points, which are connected by wire; the temperature of the A, B, C, and N phase contacts on the low-voltage side of the transformer is transmitted to the temperature concentrator by wireless because the contacts have high voltage; the oil temperature monitoring device of the oil transformer is powered by the intelligent low-voltage distribution transformer integrated distribution box (6), connected to the temperature concentrator through RS485, and monitors the oil temperature, oil pressure, oil level, etc. of the transformer.

[0061] The above technical solutions can realize the intelligent, visual, automated, and interactive functions of status monitoring of equipment inside the test bench, real-time monitoring of the environment, safe control of behaviors, and efficient support of social services, with higher security, better reliability, and higher intelligence.

[0062] The above description is only for the best embodiment of the present invention, but it should not be understood as limiting the claims. The present invention is not limited to the above embodiments, and its specific structure is allowed to be changed. However, all changes made within the protection scope of the independent claims of the present invention are within the protection scope of the present invention.

[0063] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

Claims

1. An intelligent low-voltage distribution transformer integrated distribution box, comprising a box body (6), characterized in that: It also includes a power supply and control circuit system, which is arranged in the box (6); the power supply and control circuit system includes a primary circuit composed of an intelligent circuit breaker and a reactive power compensation control terminal, which is used to supply power to the load; the intelligent circuit breaker and the reactive power compensation control terminal monitor the equipment status and measure and control electrical protection; the power supply and control circuit system also includes a temperature concentrator for monitoring the environment, and a network high-speed dome camera for video monitoring and security monitoring; The intelligent low-voltage distribution transformer integrated distribution box is installed below the substation transformer (5), and a contact temperature sensor (51) and an oil transformer oil temperature monitoring device (52) are installed in the substation transformer (5); the contact temperature sensor (51) and the oil transformer oil temperature monitoring device (52) communicate with the temperature concentrator via RS485 serial bus signals; The intelligent low-voltage distribution transformer integrated distribution box further comprises an intelligent gateway installed on the box body (6), the substation transformer (5) is provided with a TTU, and the intelligent gateway collects signals from the intelligent circuit breaker, reactive power compensation control terminal, temperature concentrator, TTU, and network high-speed dome camera and uploads them to a cloud platform; The box (6) is provided with a low-voltage side outlet for electrically connecting to the substation transformer (5); the substation transformer (5) is electrically connected to the high-voltage isolating switch (2) through a drop-out fuse (3); the high-voltage isolating switch (2) is electrically connected to the high-voltage incoming line (1); a lightning arrester (4) is connected between the drop-out fuse (3) and the substation transformer (5); and a low-voltage lead-out line for connecting to a user load is provided below the box (6); The box (6) has four compartments, including an incoming line and metering room (61) electrically connected to the substation transformer (5) through a low-voltage side outgoing line, an incoming line switch room (62), a reactive power compensation room (63), and an outgoing line switch room (64); a TTU, a metering transformer, a measuring transformer, and an intelligent gateway are installed in the incoming line and metering room (61); the TTU, the metering transformer, the measuring transformer, and the intelligent gateway are interconnected to form a first path, and the first path electrically connects the low-voltage side outgoing line and the incoming line switch room (62); An incoming line isolating switch and an incoming line circuit breaker are installed in the incoming line switch room (62), and the incoming line isolating switch is connected to the incoming line circuit breaker to form a second passage and electrically connected to the first passage in the incoming line and metering room (61); A temperature concentrator, a secondary power switch, a compensation circuit breaker, a reactive compensation control terminal, a reactive compensation miniature circuit breaker, a reactive compensation composite switch, and a compensation capacitor are installed in the reactive compensation chamber (63); the temperature concentrator, the secondary power switch, the compensation circuit breaker, the reactive compensation control terminal, the reactive compensation miniature circuit breaker, the reactive compensation composite switch, and the compensation capacitor are interconnected to form a third path, and the third path is electrically connected to the second path.

2. According to claim 1, the intelligent low-voltage distribution transformer integrated distribution box is characterized in that: The intelligent gateway is provided with an RS485 serial bus, an RJ45 Ethernet, and a hard contact signal interface for transmission to the cloud platform. The intelligent low-voltage distribution transformer integrated distribution box constructs a Modbus communication protocol with the cloud platform through the intelligent gateway.

3. The intelligent low-voltage distribution transformer integrated distribution box according to claim 2 is characterized in that: An intelligent circuit breaker and a secondary power module are installed in the outlet switch room (64), and the intelligent circuit breaker and the secondary power module are connected to each other to form a fourth path, one end of the fourth path is electrically connected to the third path, and the other end is electrically connected to the low-voltage lead-out line.

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