CN210092885U

CN210092885U - Distribution transformer monitoring and metering terminal with reactive compensation control and monitoring functions

Info

Publication number: CN210092885U
Application number: CN201921358090.6U
Authority: CN
Inventors: 王扬; 欧家祥; 张俊玮; 王蓝苓; 丁超
Original assignee: Guizhou Power Grid Co Ltd
Current assignee: Guizhou Power Grid Co Ltd
Priority date: 2019-08-21
Filing date: 2019-08-21
Publication date: 2020-02-18
Anticipated expiration: 2029-08-21

Abstract

The utility model discloses a take reactive compensation control and monitor function's distribution transformer monitoring measurement terminal, it is including distribution transformer monitoring measurement terminal and distribution network, and the switching module is connected with central processing module and data transmission module in the distribution transformer monitoring measurement terminal, and the control circuit output port of switching module is connected with the distribution network simultaneously. The reactive compensation function is performed on the distribution transformer monitoring and metering terminal by utilizing the data acquisition and processing and communication control capabilities of the distribution transformer metering terminal, the data of the reactive compensation control are sent to the background main system through the communication module, and meanwhile, the control instruction from the background system can be received to control the switching module to perform effective power compensation on the power distribution network. The efficiency of the equipment is improved, meanwhile, the installation cost of the power distribution terminal can be saved, and the field management efficiency of the power distribution terminal is improved.

Description

Distribution transformer monitoring and metering terminal with reactive compensation control and monitoring functions

Technical Field

The utility model relates to a join in marriage and become monitoring measurement terminal, especially relate to a take reactive compensation control and monitor function's joining in marriage and become monitoring measurement terminal.

Background

With the development of intelligent construction of a power distribution network, the installation requirements of auxiliary facilities in the power grid, including a power distribution terminal, a distribution transformer monitoring and metering terminal and a reactive power compensator, are more and more. The distribution transformer monitoring and metering terminal is internally provided with a data acquisition module, a data transmission module, a communication module, a data storage module, a central processing module, a system display control module and the like, and has the main function of monitoring the low-voltage side electrical quantity data of the distribution transformer, and the data is analyzed and calculated by the central processing module and then is uploaded to a master station system by the communication module through the data transmission module. The equipment function is single, and the data processing ability of distribution transformer monitoring measurement terminal is not fully utilized, and equipment efficiency is low.

The switching module is used as a reactive compensation execution element of the reactive compensator, and the inductive load used by the power grid is more and more, and the power loss of the power grid is more and more serious. The traditional reactive compensation controller can not realize the remote monitoring of the state of the reactive compensation device, and the actual operation effect of the switching module is greatly influenced. The distribution transformer monitoring and metering terminal and the reactive compensator are used as two independent devices and are respectively installed on the power grid terminal, the installation cost is high, the management difficulty is increased along with the increase of the devices, the power distribution network is too fat, and the requirement for intelligent construction of the power distribution network is not facilitated.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the utility model provides a distribution transformer monitoring and metering terminal with reactive compensation control and monitoring function to solve the problem that distribution transformer monitoring and metering terminal equipment efficiency is low and reactive compensator can't carry out remote monitoring among the prior art.

The technical scheme of the utility model is that:

a distribution transformer monitoring and metering terminal with reactive compensation control and monitoring functions comprises a distribution transformer monitoring and metering terminal and a power distribution network, wherein the distribution transformer monitoring and metering terminal is connected with a switching module; and a control circuit of the switching module is connected with a three-phase line of the power distribution network.

The distribution transformer monitoring and metering terminal comprises a data acquisition module, a data transmission module, a central processing module and a communication module; the data acquisition module is connected with the data transmission module; the data transmission module is respectively connected with the communication module and the central processing module; the switching module is respectively connected with the data transmission module and the central processing module;

the switching module adopts an integrated capacitor switching module.

The distribution transformer monitoring and metering terminal also comprises an alarm module, and the alarm module comprises a metering alarm indicator lamp and a reactive compensation alarm indicator lamp.

The utility model discloses beneficial effect:

compared with the prior art, through the utility model provides a pair of take reactive compensation control and monitor function's distribution transformer monitoring measurement terminal can be at distribution transformer monitoring measurement terminal original monitoring, newly-increased reactive compensation control function in measurement and data transmission's the function to send the data of reactive compensation control to backstage main system through communication module, both make full use of the characteristics that measurement terminal computing power is strong, promoted the equipment efficiency who distributes transformer monitoring measurement terminal. And the remote control function of reactive compensation data can be realized, and the operation effect of the reactive compensator is improved. Through the communication module in the distribution transformer metering terminal, the reactive power compensation device is automatically, locally and remotely controlled, the running state of the reactive power compensation device is monitored, and the reactive power compensation device can be safely and effectively put into use. Meanwhile, the distribution transformer monitoring and metering terminal and the reactive compensator are integrated into a device, and a current transformer in the power distribution cabinet can be used in a public mode, so that the cost in separate use is saved.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

As shown in fig. 1: a distribution transformer monitoring and metering terminal with reactive compensation control and monitoring functions comprises a distribution transformer monitoring and metering terminal 1 and a power distribution network 3, wherein a three-phase wiring terminal of the distribution transformer monitoring and metering terminal 1 is connected with a three-phase power line of the power distribution network; and the three-phase wiring terminal of the switching module 2 is connected with a three-phase power line of the power distribution network 3.

Two data line plug serial ports of the switching module 2 are respectively connected with the serial ports of the central processing module 13 and the data transmission module 12 in the distribution transformer monitoring and metering terminal 1.

The data acquisition module 11 is connected with the data transmission module 12; the data transmission module 12 is respectively connected with the communication module 15 and the central processing module; the switching module 2 is respectively connected with the data transmission module 12 and the central processing module 13.

Preferably, the data acquisition module 11 is a data acquisition unit of Germany 34970A, which is produced by Shenzhen Yuanchu science and technology Limited.

Preferably, the data transmission module 12 is a DL7300 type 4G module provided by beijing hengyu dingli technology ltd.

Preferably, the communication module 15 is a HIT-232DTU-4G communication module manufactured by Shenzhen Huasheng technology Limited.

Preferably, the central processing module 13 is a CPU module of model S7-1500 provided by shannan singing Jing automation equipment, ltd.

The switching module 2 adopts an integrated capacitance switching module, so that the power distribution network 3 is prevented from additionally adding a group of capacitors when the reactive power compensator is installed. Preferably, the switching module 2 is an integrated capacitor switching module ZRTXMKD provided by zhejiang energy-compatible power equipment limited.

The data collected by the data collection module 11 is compared with the protection setting value set by the central processing module 13, and an alarm signal is sent to the alarm module. In order to distinguish fault positions, a data abnormality alarm signal and a reactive compensation state abnormality alarm signal with the distribution transformer terminal 1 are respectively sent to the metering alarm indicator lamp 141 and the reactive compensation alarm indicator lamp 142.

Preferably, the alarm module 11 is a CH-M3G7Z19 full-network-through 4G short message receiving module provided by shenzhen chonghan science and technology development limited, and can realize the functions of information receiving and alarming.

Functional overview: the data transmission module 12 sends the data acquired by the data acquisition module 11 to the central processing module 13, the central processing module 13 calculates and analyzes the data, and sends a control signal to the switching control module 2 according to the comparison result of the calculation result and the control setting value and the protection setting value and the comprehensive locking signal, and the switching module 2 controls the built-in capacitor to realize the actions of switching in and switching out. Meanwhile, the central processing module 103 sends the data of reactive compensation to the background control system through the data transmission module 12 and the communication module 15. The background system can also send out a control command, the control command is received by the communication module 15 and then transmitted to the switching module 2 through the data transmission module 12, and the switching module executes the control command.

In the experiment, when the set power factor is less than 0.92, the switching module 2 puts into a capacitor. When the power factor is negative, the central control module 13 issues an ablation command. The throwing and cutting sequence is carried out according to the sequence of throwing firstly, cutting firstly, and supplementing together and then supplementing separately. When the load is set to be 0.8L, the data acquisition module 11 acquires parameters such as voltage, current, active power, reactive power and the like, the parameters are transmitted to the central processing module 13 through the data transmission module 12, the central processing module 13 sends a switching instruction to the switching module 2 after judgment, and the switching module 2 is switched in according to the sequence of first co-compensation and then sub-compensation. When the load is set to 0.8C, the central processing module 13 sends an excision instruction after judging the acquired data at that time.

The voltage is set to 240V, the load is set to 0.8L, the central processing module 13 sends a primary overvoltage protection instruction, and the switching module 2 does not put into the capacitor.

The voltage is set to 220V, the load is set to 0.8L, the central processing module 13 sends an input instruction, after the capacitors are all input, the voltage is set to 250V, the central processing module 13 sends a secondary overvoltage protection instruction, and the switching module 2 cuts off all input capacitors.

The voltage is set to be 220V, the load is set to be 0.8L, the central processing module 13 sends an input instruction, after the capacitors are all input, the voltage is set to be 120V, the central processing module 13 sends a voltage-loss protection instruction, and the switching module 2 cuts off all input capacitors.

The voltage is set to be 220V, the load is set to be 0.8L, the central processing module 13 sends an input instruction, after the capacitors are all input, the one-phase power supply is disconnected, the central processing module 13 sends an open-phase protection instruction, and the switching module 2 cuts off all the input capacitors.

Claims

1. The utility model provides a take reactive compensation control and monitor function's distribution transformer monitoring measurement terminal, it is including distribution transformer monitoring measurement terminal (1) and distribution network (3), its characterized in that: the distribution transformer monitoring and metering terminal (1) is connected with the switching module (2); the switching module (2) is connected with a power distribution network (3) through a lead.

2. The distribution transformer monitoring and metering terminal with the reactive compensation control and monitoring function according to claim 1, characterized in that: the distribution transformer monitoring and metering terminal (1) comprises a data acquisition module (11), a data transmission module (12), a central processing module (13) and a communication module (15); the data acquisition module (11) is connected with the data transmission module (12); the data transmission module (12) is respectively connected with the communication module (15) and the central processing module (13); the switching module (2) is respectively connected with the data transmission module (12) and the central processing module (13).

3. The distribution transformer monitoring and metering terminal with the reactive compensation control and monitoring function according to claim 1, characterized in that: the switching module (2) adopts an integrated capacitor switching module.

4. The distribution transformer monitoring and metering terminal with the reactive compensation control and monitoring function according to claim 1, characterized in that: the distribution transformer monitoring and metering terminal (1) further comprises an alarm module (14), and the alarm module (14) comprises a metering alarm indicator lamp (141) and a reactive compensation alarm indicator lamp (142).