CN207320836U - Active intelligent type comprehensive power distribution equipment - Google Patents

Abstract

The purpose of this utility model is an active intelligent integrated power distribution device, including a power distribution outer box. The power distribution outer box is divided into four parts: an incoming line room, a metering room, an outgoing line room and a reactive power compensation room. The main incoming line switch in the incoming line room is respectively connected with the metering unit in the metering room, the reactive power compensation unit in the reactive power compensation room and the molded case circuit breaker in the outgoing line room through wires to form a system capable of reactive power compensation at the load end and balancing three-phase current. Power distribution device, the connecting terminals of the molded case circuit breaker are respectively connected to the power grid, and the reactive power and three-phase unbalance on the load side are detected through the current transformer of the incoming line unit, and then the SVG active module and the passive capacitor module Make compensation, through smart terminals, increase the intensity of automation, and improve the efficiency of operation and management.

Description

Active intelligent integrated power distribution device

technical field

The utility model relates to the field of integrated power distribution devices for rural power grids, and mainly relates to the improvement and design of reactive power compensation and three-phase current balance for rural power grids, and especially relates to an active intelligent integrated power distribution device.

Background technique

At present, the general integrated power distribution cabinets for rural power grids are mainly used in rural and suburban rural distribution networks. It is difficult to solve some problems of low power quality in the rural distribution network, such as the long power supply radius of some power distribution lines and the line loss rate. Higher, larger voltage drop, the nature of electricity consumption is mostly lighting electricity, low load rate, low voltage at the end of the line during peak hours of electricity consumption, high voltage during valley hours, voltage changes with the day and night and seasonal changes of the load, and is not stable enough , in the case of small loads, the power factor is lower than the assessment standard, and the power loss of the distribution network is large; Unbalanced and low terminal voltage may also cause switches and transformers to heat up, or even burn out. The distribution station area is distributed in many areas, and the load control basically relies on manual operation. There is no foundation for distribution network automation, and there is no unified background monitoring equipment, and the operation lacks effective management.

Therefore, an active intelligent integrated power distribution device is provided. By effectively improving the power distribution device, the SVG module and the capacitor module can be effectively coordinated with each other, and the reactive power and the load side are detected by the current transformer of the incoming line unit. The three-phase unbalance is then compensated by the SVG active module and passive capacitor module. At the same time, the device transmits the current information and device information to the intelligent terminal unit for measurement display, control and protection, and external communication to improve the balance of the three-phase current. Through Intelligent terminals, increasing the intensity of automation, and improving the efficiency of operation management have become problems that technicians in the field need to solve urgently.

Utility model content

The purpose of this utility model is to provide an active intelligent integrated power distribution device. By effectively improving the power distribution device, the SVG module and the capacitor module can be effectively matched with each other, and the load side can be detected by the current transformer of the incoming line unit. The reactive power and three-phase unbalance are then compensated by the SVG active module and passive capacitor module. At the same time, the device transmits the current information and device information to the intelligent terminal unit for measurement display, control protection, external communication, and improves the three-phase current. Through intelligent terminals, the intensity of automation can be improved, and the efficiency of operation and management can be improved.

In order to solve the technical problems described in the background technology, the utility model adopts the following technical solutions:

The active intelligent integrated power distribution device includes a power distribution outer box. The power distribution outer box is divided into four parts: the incoming line room, the metering room, the outgoing line room and the reactive power compensation room. The total incoming line in the incoming line room The line switch is respectively connected with the metering unit in the metering room, the reactive power compensation unit in the reactive power compensation room, and the molded case circuit breaker in the outlet room through wires to form a power distribution device capable of reactive power compensation at the load end and balancing three-phase current. The connection terminals of the molded case circuit breaker are respectively connected to the power grid. Preferably, the current transformers A, B, and C in the incoming line room are respectively connected to the connection ports a, b, and c of the main incoming line switch, and the collection terminal and the meter in the metering room are all connected to the metering junction box through the metering junction box. The input terminal of the intelligent integrated power distribution terminal is connected, and the output end of the intelligent integrated power distribution terminal is respectively connected to the reactive power compensation unit in the reactive power compensation room. Through the mutual combination of the intelligent integrated power distribution terminal and the reactive power compensation unit, it can effectively control the Avoid the unbalanced three-phase current of the distribution transformer line, improve the feedback efficiency of reactive power compensation, and avoid heating of switches and transformers.

Preferably, the output connection terminals 1, 2, and 3 of the molded case circuit breaker in the outlet room are correspondingly connected to L1, L2, and N of the grid lines, respectively.

Preferably, the incoming line circuit breaker in the main incoming line switch and the current transformer are connected through the RS485 communication protocol, and the signal transmission connection is performed through the RS485 communication protocol, which can improve the anti-interference ability during signal transmission and improve the signal transmission. and feedback accuracy.

Preferably, the reactive power compensation unit is composed of an SVG module, a capacitor module A and a capacitor module B, and the SVG module adopts a static var generator SVG active module,

Preferably, the SVG module is mainly composed of an IGBT power commutation unit, a connecting reactor, a soft-start circuit, a high-frequency harmonic circuit, a current-limiting fuse, a touch screen, etc., by sampling current and voltage signals for analysis and comparison, Send switching commands according to system requirements, and automatically switch capacitive compensation or inductive compensation. The SVG active module of the static var generator can provide both capacitive reactive power and inductive reactive power. The reactive power capacity ensures continuous adjustment and smooth output, realizes bidirectional automatic adjustment compensation, and can perform harmonic and three-phase Unbalanced governance.

The beneficial effects of the utility model are:

1) The reactive power and three-phase unbalance on the load side are detected by the current transformer of the incoming line unit, and then compensated by the SVG active module and passive capacitor module.

2) At the same time, the device transmits the current information and device information to the intelligent terminal unit for measurement display, control protection, external communication, and improves the balance of the three-phase current. Through the intelligent terminal, the automation intensity is improved and the operation management efficiency is improved.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. For some embodiments described, those skilled in the art can also obtain other drawings according to these drawings.

Fig. 1 is a schematic structural view of a specific embodiment of an active intelligent integrated power distribution device of the present invention;

Fig. 2 is a schematic back view of the structure of the specific embodiment of the active intelligent integrated power distribution device of the present invention.

Detailed ways

In order to make those skilled in the art better understand the technical solution of the utility model, the utility model will be further introduced in detail below in conjunction with the accompanying drawings.

Please refer to Figure 1 and Figure 2, the active intelligent integrated power distribution device includes the power distribution outer box, and the power distribution outer box is divided into four parts: the incoming line room, the metering room, the outgoing line room and the reactive power compensation room. The main incoming line switch in the incoming line room is respectively connected with the metering unit in the metering room, the reactive power compensation unit in the reactive power compensation room, and the molded case circuit breaker in the outgoing line room through wires to form a three-phase reactive power compensation at the load end. The current distribution device, the connecting terminals of the molded case circuit breaker are respectively connected to the power grid. Preferably, the current transformers A, B, and C in the incoming line room are respectively connected to the connection ports a, b, and c of the main incoming line switch, and the collection terminal and the meter in the metering room are all connected to the metering junction box through the metering junction box. The input terminal of the intelligent integrated power distribution terminal is connected, and the output end of the intelligent integrated power distribution terminal is respectively connected to the reactive power compensation unit in the reactive power compensation room. Through the mutual combination of the intelligent integrated power distribution terminal and the reactive power compensation unit, it can effectively control the Avoid the unbalanced three-phase current of the distribution transformer line, improve the feedback efficiency of reactive power compensation, and avoid heating of switches and transformers.

Preferably, the output connection terminals 1, 2, and 3 of the molded case circuit breaker in the outlet room are correspondingly connected to L1, L2, and N of the grid lines, respectively.

Preferably, the incoming line circuit breaker in the main incoming line switch and the current transformer are connected through the RS485 communication protocol, and the signal transmission connection is performed through the RS485 communication protocol, which can improve the anti-interference ability during signal transmission and improve the signal transmission. and feedback accuracy.

Preferably, the reactive power compensation unit is composed of an SVG module, a capacitor module A and a capacitor module B, and the SVG module adopts a static var generator SVG active module,

Preferably, the SVG module is mainly composed of an IGBT power commutation unit, a connecting reactor, a soft-start circuit, a high-frequency harmonic circuit, a current-limiting fuse, a touch screen, etc., by sampling current and voltage signals for analysis and comparison, Send switching commands according to system requirements, and automatically switch capacitive compensation or inductive compensation. The SVG active module of the static var generator can provide both capacitive reactive power and inductive reactive power. The reactive power capacity ensures continuous adjustment and smooth output, realizes bidirectional automatic adjustment compensation, and can perform harmonic and three-phase Unbalanced governance.

In specific implementation, the active intelligent integrated power distribution device, the stainless steel box 1 is composed of 5 groups of incoming line room 2, metering room 3, outgoing line room 4 and reactive power compensation room. The stainless steel box 1 has a rectangular parallelepiped structure as a whole, and the front and rear doors are open. Viewed from the front of the box 1, the far right end is the incoming line room 2. The incoming line intelligent circuit breaker 6 and the current transformer 7 are installed in the incoming line room 2. The left side of the metering room is the metering room 3, the upper part of the metering room 3 is equipped with a metering meter 8, and the lower part is an optional intelligent power distribution terminal 9; the left side of the metering room is the front of the reactive power compensation room 4, and a power switch is installed inside 12 and connector 13; the reactive power compensation chamber 3 is a front-to-back interconnection structure, and behind the connector is an SVG active module 14 and a common capacitor composite switch module 15. Viewed from the back of the box body 1, the reactive power compensation chamber 4 is at the far right end of the box body 1, and contains a reactive power compensation control 11, an SVG active module 14, and a common capacitor composite switch 15. The SVG module 14 and the common capacitor module 15 adopt 2U technology It is fixed on the inner beam of the box body 1, and is connected with other components through the connector 13. Viewed from the back of the box body 1, the left side of the reactive power compensation chamber 4 is the outgoing line room 5, which is equipped with outgoing lines. The intelligent molded case circuit breaker outgoing line room 5, incoming line room 2, and metering room 3 are separated by steel plates and are relatively independent. , Corresponding holes are opened on the steel plate for the connection of copper bars and cables.

Some exemplary embodiments of the present utility model have been described above only by way of illustration. Undoubtedly, for those skilled in the art, without departing from the spirit and scope of the present utility model, various Modifications are made to the described embodiments. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present utility model.

Claims (4)

1. An active intelligent integrated power distribution device, including a power distribution outer box. The power distribution outer box is divided into four parts: an incoming line room, a metering room, an outgoing line room and a reactive power compensation room. It is characterized in that: the described The main incoming line switch in the incoming line room is respectively connected with the metering unit in the metering room, the reactive power compensation unit in the reactive power compensation room and the molded case circuit breaker in the outgoing line room through wires to form a system capable of reactive power compensation at the load end and balancing three-phase current. The power distribution device, the connection terminals of the molded case circuit breaker are respectively connected to the power grid, the reactive power compensation unit is composed of a SVG module, a capacitor module A and a capacitor module B, and the SVG module adopts a static var generator SVG with The source module, the SVG module is mainly composed of an IGBT power converter unit, a connecting reactor, a soft start circuit, a high frequency harmonic circuit, a current limiting fuse, and a touch screen. 2. The active intelligent integrated power distribution device according to claim 1, characterized in that the current transformers A, B, and C in the incoming line room are respectively connected to the wiring ports a, b, and c Corresponding connection, the collection terminal and the meter in the metering room are connected to the input end of the intelligent integrated power distribution terminal through the metering junction box, and the output ends of the intelligent integrated power distribution terminal are respectively connected to the reactive power compensation unit in the reactive power compensation room. 3. The active intelligent integrated power distribution device according to claim 1, characterized in that, the output connection terminals 1, 2, 3 of the molded case circuit breaker in the outlet room are respectively connected to L1, L2, N corresponds to a connection. 4. The active intelligent integrated power distribution device according to claim 1, characterized in that, the incoming line circuit breaker in the main incoming line switch and the current transformer are connected through the RS485 communication protocol.