CN206283322U - Feeder pillar side low voltage distribution monitoring device - Google Patents

Abstract

The utility model relates to a low-voltage power distribution monitoring device on the side of a branch box, which is characterized in that it includes a power acquisition module connected to a CPU control module through a carrier communication module; it also includes a power supply module that provides power supply; and a switch The combined current transformer and the split current transformer are connected to the power line through the piercing clip, and the split current transformer is also connected to the CPU control module through the carrier communication module. The utility model can realize the real-time monitoring of the running state of each branch line of the low-voltage power grid. Provide data support for the active operation and maintenance of the station area, and improve the power supply quality of the power grid.

Description

Low-voltage power distribution monitoring device on branch box side

Technical field:

The utility model relates to a low-voltage power distribution monitoring device on a side of a branch box.

Background technique:

Station area management and low-voltage power grid management are important components of distribution network operation and inspection work, and are the "last mile" connecting power supply companies and end users. The quality of low-voltage power grid operation inspection work directly affects the quality of electricity consumption by end users. However, the current low-voltage power grid has complex lines and a large number of equipment, resulting in a huge workload for operation and maintenance. If real-time and comprehensive monitoring of the low-voltage power grid can be carried out, and the operation data of the low-voltage power grid can be provided for the power grid operation status analysis system, it will be of great help to improve the quality of power supply.

There are many problems, the most important ones are:

1. The low-voltage power grid lines are complex, and there is no real-time online monitoring means, resulting in a huge workload of operation and maintenance;

2. The use of three-phase smart meters can realize data monitoring, but three-phase smart meters are metering equipment, which are expensive and bulky, and are used as a monitoring and analysis system to cause waste of resources;

3. Without the support of low-voltage power grid operation data, the operation and maintenance work is basically passive rush repair and planned inspection, resulting in unclear goals, low work efficiency, and high customer complaint rate.

Utility model content:

In order to solve the deficiencies in the above technical problems, the purpose of this utility model is to provide a branch box side low-voltage power distribution monitoring device that can overcome the above deficiencies and meet the needs of use.

The low-voltage power distribution monitoring device on the side of the branch box provided by the utility model is characterized in that it includes a power acquisition module, which is connected to the CPU control module through a carrier communication module; it also includes a power supply module, which provides power supply; it also includes a switch The combined current transformer and the split current transformer are connected to the power line through the piercing clip, and the split current transformer is also connected to the CPU control module through the carrier communication module.

The power module described is a three-phase four-wire input mode.

The carrier communication module adopts a standard interface.

The power collection module scheme uses ATT7022E.

The beneficial effects of the utility model are:

Real-time monitoring of the operating status of each branch line of the low-voltage power grid can be realized. Provide data support for the active operation and maintenance of the station area, and improve the power supply quality of the power grid.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:

Fig. 1 is a block diagram of the utility model;

detailed description

As shown in Figure 1, the branch box side low-voltage power distribution monitoring device provided by this device is installed in the branch box of the low-voltage power grid to monitor the power parameters of each branch in the branch box.

The monitored parameters include ABC three-phase voltage effective value, ABC and N-phase current effective value, ABC three-phase active power, reactive power, power factor, ABC three-phase current, voltage unbalance rate, and ABC three-phase current and voltage Harmonic content etc.

Through the above parameters, the operation quality of the branch power grid can be accurately evaluated, and line faults or hidden dangers such as phase loss, undervoltage, overvoltage, overcurrent, and unbalance rate can be judged through monitoring data, providing data support for active operation and maintenance.

The device adopts broadband/high-speed narrow-band carrier communication mode, and does not need to lay communication lines. The voltage sampling and power supply come from the same line, the sampling line adopts the piercing clamp, and the current sampling adopts the open-close type transformer. The above characteristics make the device easy to install, can be operated with electricity, and is extremely convenient to use;

The power supply module is a three-phase four-wire input mode, which can supply power for three phases at the same time or single-phase independent power supply. The advantage of this mode is that when there is a phase failure in the circuit, as long as any one phase line is normal, the device can work normally. , monitor and report lack of phase fault;

The power acquisition module solution adopts ATT7022E. ATT7022E is a multi-functional high-precision three-phase electric energy dedicated metering chip, which is suitable for the three-phase four-wire application scenario of this device. The voltage acquisition is through the voltage transformer on the motherboard, and the current acquisition is through the external current transformer. The collected and processed data is sent to the CPU control module for further analysis and processing.

The CPU control module adopts STM32F103 series high-performance ARM processor, and the CPU control module also includes a real-time clock, data storage circuit, etc.

The carrier communication module adopts a standard interface, and different types of carrier modules (broadband/high-speed narrowband) from different manufacturers can be selected according to the site network conditions to ensure communication reliability.

After the device is installed, it enters the monitoring state. The power acquisition module automatically collects various power parameters on the connected circuit, and sends the processed results to the CPU control module. The CPU control module further analyzes the received data, and according to the configuration in the The alarm threshold in the memory is used to judge whether there is an over-limit alarm or not. If an alarm is detected, it will immediately report the alarm to the monitoring host. If the data is normal, the monitoring device will wait for the polling of the monitoring host, and send the line power parameters to the monitoring host.

The above-mentioned implementation examples are only examples for clarifying the utility model, and are not intended to limit the implementation of the utility model. Obvious changes or changes derived from the spirit of the utility model are still within the protection scope of the utility model.

Claims (4)

1. a kind of feeder pillar side low voltage distribution monitoring device, it is characterized in that, including electric quantity acquisition module, electric quantity acquisition module passes through Carrier communication module connects CPU control modules；Also include power module, power module provides supply of electric power；Also include open-close type Current transformer, open-close type current transformer connects power circuit by penetrating cable clamp, and open-close type current transformer is also by load Wave communication module connects CPU control modules.

2. feeder pillar side low voltage distribution monitoring device according to claim 1, it is characterized in that, described power module is three The line input mode of phase four.

3. feeder pillar side low voltage distribution monitoring device according to claim 1, it is characterized in that, described carrier communication module Using standard interface.

4. feeder pillar side low voltage distribution monitoring device according to claim 1, it is characterized in that, described electric quantity acquisition module Scheme uses ATT7022E.