CN202330489U - Integral load control metering device of transformer station - Google Patents

Abstract

The utility model discloses an integrated negative control metering device for changing stations, which comprises a box body, a metering device, a negative control terminal and a load switch. There are also a load current and voltage meter, a knife switch and a group of monitoring transformers in the box. The knife switch and the load switch are connected through a copper bar, the output end of the knife switch is connected with the metering device through a wire, and the monitoring transformer is set on the copper bar. It is electrically connected with the load current voltmeter, and the load control terminal is respectively connected with the load switch and the metering device through the control signal line and the data line; an intelligent alarm device is also provided, and the intelligent alarm device is connected with the load control terminal through a wireless signal. The advantages are: it can reduce user burden and construction cost, eliminate potential safety hazards, and facilitate the transmission of negative control power purchase information and user purchase of electricity; it is compatible with high and low voltage metering methods, and enhances the timeliness and reliability of remote meter reading. Wider promotion has harmonized the relationship between power supply and consumption.

Description

Transformer integrated negative control metering device

technical field

The utility model relates to a metering device used in an electric power system, in particular to an integrated negative control metering device for changing stations.

Background technique

At present, the power supply mode of 315KVA and below special transformer users adopts the outdoor "H-type transformer" method uniformly. The traditional negative control metering device is a split structure consisting of a metering device, a negative control terminal and an intelligent control device. Its metering device and intelligent control device are installed in the metering cabinet of the user's power distribution room, and the negative control terminal is installed in the user's power distribution room. The transformer on the substation is connected to the negative control metering device through buried underground or overhead cables. This installation structure has been gradually eliminated because the distance between the transformer station and the power distribution room is often tens of meters, which has great power theft and potential safety hazards.

In order to eliminate the power theft and potential safety hazards of the traditional load control metering device, the improved installation structure installs the metering device in the metering box below the substation, and the load control terminal is installed in the user's power distribution room. The control switch is connected by control and signal cables. Although this structure can prevent electricity theft, the negative control terminal is still installed in the power distribution room and has a certain distance from the metering device, resulting in the separation of "metering and control". For the implementation of meter reading and power purchase by the load control terminal, a 485 interface and pulse cable must be laid between the load control terminal and the transformer meter box, and the cable is buried underground or overhead. The construction is very inconvenient, which not only increases the project cost and user burden, but also leaves a safety hazard. When the cable is disconnected or damaged by external force, it will affect the normal operation of the load control terminal, and even affect the normal power consumption of customers.

Contents of the invention

The technical problem to be solved by the utility model is to provide an integrated negative control metering device for changing stations that can reduce user burden and construction cost, eliminate potential safety hazards, facilitate the transmission of negative control power purchase information and user power purchase, and have a wide range of applications.

The utility model is realized in this way: it includes a box body, a metering device, a load control terminal and a load switch. It is also equipped with a load current and voltage meter, a knife switch and a group of monitoring transformers. The knife switch is connected to the load switch through a copper bar, and the output end of the knife switch is connected to the power input end of the metering device through a wire. The monitoring mutual inductance The device is set on the copper bar between the knife switch and the load switch and is electrically connected with the load current voltmeter, the load control terminal is connected with the load switch through the control signal line, and the load control terminal is connected with the metering device through the data line; the transformer is integrated The chemical load control metering device is also equipped with an intelligent alarm device, which is connected with the load control terminal through a wireless signal.

In the above-mentioned integrated negative control metering device for changing stations, a group of metering transformers are set on the copper bar between the knife switch and the load switch, and the metering transformers are electrically connected with the data input end of the metering device for 380V low voltage users.

In the above-mentioned integrated negative control metering device for changing stations, the intelligent alarm device is composed of a wireless receiving and sending module controlled by a single-chip microcomputer and an alarm.

In the above-mentioned integrated negative control metering device for changing platforms, the box body is divided into front and rear box chambers through the vertical plate inside it, and the front box room is divided into front and back box rooms sequentially from top to bottom through the frame inside it. instrument room, metering room and negative control room, the load current voltmeter, metering device and negative control terminal are respectively installed in the instrument room, metering room and negative control room, and the knife switch, monitoring transformer and load switch It is arranged in the back box room successively from the bottom to the bottom.

The utility model has the advantages that: since the load control terminal, the metering device, and the load switch are integrated and installed in the box body, and the intelligent alarm device is connected with the load control terminal through a wireless signal, the intelligent alarm device only needs to be installed in the power distribution room, There is no need to lay buried or overhead cables between the load control terminal and the metering device, which can reduce the burden on users and construction costs, eliminate the safety hazards of buried or overhead cables, and facilitate the transmission of load control power purchase information and power purchase by users; compatible with high and low voltage The two metering methods have enhanced the timeliness and reliability of remote meter reading, strengthened the further implementation of negative control power purchases, facilitated the acquisition of power purchase information by users, are suitable for wider promotion, and harmonized the relationship between power supply and consumption.

Description of drawings

Fig. 1 is the structural representation of the casing of the present utility model;

Fig. 2 is a left view of Fig. 1 (with the front box door removed);

Fig. 3 is the right side view of Fig. 1 (remove the rear box door);

Fig. 4 is the schematic circuit diagram of the utility model.

In the figure: box body 1, front box door 2, negative control terminal 3, room door 4, frame 5, metering device 6, load current and voltage meter 7, front box room 8, instrument room 801, metering room 802, negative control room 803 , vertical plate 9, inlet pipe 10, rear box chamber 11, vertical beam 12, knife gate 13, copper bar 14, monitoring transformer 15, metering transformer 16, mounting plate 17, load switch 18, rear box door 19, Front panel 20, wireless receiving and sending module 21, alarm 22.

Detailed ways

As shown in the figure, the utility model has a box body 1, a front box door 2 and a rear box door 19 are installed respectively in front of the box body 1, and a rear box door 19, and an inlet pipe 10 is provided on the top surface of the box body 1. The box body 1 is divided into a front box room 8 and a rear box room 11 by a vertical plate 9 fixed inside it, and the front box room 8 is divided into an instrument room 801 and a metering room sequentially from top to bottom by a frame 5 arranged inside it. 802 and negative control room 803, in the instrument room 801, metering room 802 and negative control room 803 are respectively equipped with a load current voltmeter 7, a metering device 6 and a negative control terminal 3, the load current voltmeter 7 is installed in the instrument room 801 On the front panel 20, the metering device 6 and the negative control terminal 3 are installed on the vertical plate 9 respectively, and the entrances of the metering chamber 802 and the negative control chamber 803 are installed on the frame 5 with additional chamber doors 4 for sealing. 4 is equipped with transparent glass for easy observation. The vertical beam 12 that is provided with a plurality of strip mounting holes is symmetrically fixed in the rear box chamber 11 on the inner wall of both sides of the box body 1, and three mounting plates 17 are fixed from top to bottom between the two vertical beams 12. A knife switch 13, a group of monitoring transformers 15 and a load switch 18 are respectively installed on the block mounting plate 17.

The switch 13 is connected to the load switch 18 through three copper bars 14, the output end of the switch 13 is connected to the power input end of the metering device 6 through three wires, and the monitoring transformer 15 is set between the switch 13 and the load switch. The copper bar 14 between the switches 18 is connected with the load current voltmeter 7 through the signal line, the load control terminal 3 is connected with the load switch 18 through the control signal line, and the load control terminal 3 is connected with the data of the metering device 6 through a set of data lines. output connection. On the mounting plate 17 between the knife switch 13 and the load switch 18, there is also a set of metering transformers 16 set on the copper bars 14, and the metering transformers 16 are connected to the data input end of the metering device 6 through signal lines , for 380V low-voltage users.

The station-changing integrated negative control metering device 6 is also provided with an intelligent alarm device, which is connected with the negative control terminal 3 through a wireless signal. The intelligent alarm device is composed of a wireless receiving and sending module 21 and an alarm 22 controlled by a single-chip microcomputer.

During installation, the box body 1 is fixed on the electric pole below the substation through hoops and brackets, the intelligent alarm device is installed in the user's power distribution room, and the power supply is drawn out from the transformer secondary terminal and inserted into the box body through the inlet pipe 1 and connected to the input end of the knife switch 13, the power supply cable connected to the user power distribution cabinet is inserted into the box body 1 from the bottom surface of the box body 1 and connected to the lower contact of the load switch 18.

Claims (4)

1. A platform-changing integrated negative control metering device, comprising a box body, a metering device, a load control terminal and a load switch, is characterized in that: the metering device, the load control terminal and the load switch are installed in the box body respectively, The box is also equipped with a load current and voltage meter, a knife switch and a group of monitoring transformers. The knife switch is connected to the load switch through a copper bar, and the output end of the knife switch is connected to the power input end of the metering device through a wire. The monitoring transformer is set on the copper bar between the knife switch and the load switch and is electrically connected with the load current voltmeter, the load control terminal is connected with the load switch through the control signal line, and the load control terminal is connected with the metering device through the data line; The integrated negative control metering device is also equipped with an intelligent alarm device, which is connected with the negative control terminal through a wireless signal. 2. The integrated negative control metering device for changing stations according to claim 1, characterized in that: a set of metering transformers is set on the copper bar between the knife switch and the load switch, and the metering transformers are connected with the metering transformers. The data input terminal of the device is electrically connected. 3. The station-changing integrated negative control metering device according to claim 1, characterized in that: the intelligent alarm device is composed of a wireless receiving and sending module controlled by a single-chip microcomputer and an alarm. 4. The integrated negative control metering device according to claim 1, characterized in that: said box body is divided into front and rear box chambers by a vertical plate arranged inside it, and said front box room is set The frame inside it is divided into instrument room, metering room and negative control room successively from top to bottom. The load current and voltage meter, metering device and negative control terminal are respectively installed in the instrument room, metering room and negative control room. The knife switch, monitoring transformer and load switch are arranged in the rear box room from top to bottom.

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