Intelligent internet-of-things perception regulation and control system and method based on low-voltage distribution network station area

Abstract

The invention discloses an intelligent internet-of-things perception regulation and control system and method based on a low-voltage distribution network area, and an energy controller, a branch box monitoring device, a meter box monitoring device, and a new energy monitoring device and the like are used as Internet of Things sensing nodes and are installed at a distribution transformer low-voltage side main switch outgoing line, a branch box outgoing line, a meter box outgoing line, a distributed photovoltaic device, a charging pile and the like. The functions of monitoring the state of each low-voltage switch of the low-voltage power distribution network, synchronously acquiring periodic electric energy data such as voltage, current, power and indicating value of segmented lines, users, distributed photovoltaic and charging piles, and carrying out edge calculation such as area quasi-real-time line loss calculation and abnormal alarm are realized; functional applications such as low-voltage user power failure active reporting, transformer area topology automatic identification, meter box access control state monitoring, distributed photovoltaic monitoring and ordered charging pile charging are realized, and intelligent panoramic sensing and quasi-real-time monitoring of the running state of the low-voltage distribution transformer network are comprehensively realized.

Description

technical field [0001] The invention belongs to the field of electric power technology, and in particular relates to a sensing control system and method based on a low-voltage distribution network station area intelligent Internet of Things. Background technique [0002] In order to achieve environmental protection and energy saving, improve the interactive ability of the power grid, and strengthen the interactive response ability of the power grid and the demand side, the application of the low-voltage distribution network platform area is becoming more and more widely, and the low-voltage distribution network platform area can fully tap the value of smart energy meter data , showing significant performance in areas such as intelligent perception of the Internet of Things in the station area, online monitoring of equipment operation, lean management of line loss in the station area, collaborative service of source, network, load and storage, and friendly interaction with cus...

AI Technical Summary

Problems solved by technology

[0005] ①Using the power line carrier communication channel, if the low-voltage user side loses power, the power supply line from the low-voltage side to the user end must be disconnected, and the communication must also be interrupted at the same time. Naturally, the information on the meter side cannot be reported if the channel is lost;

[0006] ② Electric energy meters and collectors on the user side have no backup power supply, and cannot work when power is lost, and have no ability to report;

[0007] ③ RS-485 interface electric energy meter, the collector is external, and the attribute of RS485 interface stipulates that the electric energy meter cannot actively report data

[0010] ① Judging whether the user belongs to the station area by means of a power outage in the entire station area, which will easily lead to a decrease in the reliability of power supply, and the workload is heavy, so it is not easy to implement;

[0011] ②The household variable relationship is identified one by one by the hand-held device. The workload is heavy. After the on-site operating environment is changed, such as the cutting of the station area, the calibration of the household variable relationship needs to be re-calibrated, and the workload of repeated testing is heavy;

[0012] ③Use the low-voltage power line carrier scheme to realize household variable relationship identification, low-voltage power line carrier zero crossing or signal quality judgment method, due to the serious crosstalk of low-voltage power line carrier, the recognition accuracy is not high

[0013] (3) The data collection granularity of the low-voltage distribution network is difficult to meet the business needs. The reasons are as follows:

[0015] (4) The impact and challenges brought by the orderly charging management of distributed photovoltaic and electric vehicle charging piles on the low-voltage distribution network

[0016] ① There is a certain regularity in the electricity consumption of residential users, with less electricity consumption during the day and more electricity consumption at night, while distributed photovoltaics generate electricity during the day, so that the consumption of distributed photovoltaic power generation is less, causing the terminal voltage to be high, and even entering through the transformer 10kV line, causing safety hazards

[0017] ②The rapid development of electric vehicles has led to a rapid increase in charging piles, and the charging of charging piles is in a state of disorderly management, which is likely to cause abnormal conditions such as overloading of the transformer in the low-voltage distribution transformer area. How to charge on the basis of the existing transformer capacity? Effective charging management of piles is the most effective means to solve the impact of electric vehicle development on low-voltage distribution network

Images