Intelligent power distribution terminal and method capable of implementing power utilization behavior analysis of charging pile

Abstract

The invention provides an intelligent power distribution terminal capable of implementing power utilization behavior analysis of a charging pile. The intelligent power distribution terminal includes a CPU main control module, and a communication module, a remote metering module and a remote control and communication module all connected with the CPU main control module. The CPU main control module is composed of an ARM chip and a peripheral circuit thereof. An Ethernet chip, and an optic fiber communication sub module and an Ethernet sub module both connected to an external control device are integrated in the communication module. The remote metering module is connected with voltage and current in power grids of a transformer side and a charging pile side at the same time and includes two units of current transformers, two units of voltage transformers, an AC converting chip and a first filtering circuit. A remote control sub module equipped with a three-level electronic lock watchdog and a remote communication sub module equipped with a second filtering circuit as well as a photoelectric isolation circuit are integrated in the remote control and communication module. By applying the intelligent power distribution terminal and method provided by the invention, voltage and current in the power grids of transformer side and the charging pile side can be changed in real time and the maximal power of the charging pile that can be started currently can be calculated out.

Description

technical field [0001] The invention relates to the technical field of intelligent distribution network measurement, in particular to an intelligent power distribution terminal for analyzing the power consumption behavior of charging piles. Background technique [0002] With the vigorous construction of the distribution network, the development of intelligent power distribution terminals has made great achievements in China. In order to meet the high demand of users for electricity consumption, various monitoring terminals have been installed in the distribution network, including station terminal DTU, distribution transformer terminal TTU, relay protection device, voltage monitor and power quality monitor, etc. It is always operated independently, fails to play a systematic function, and does not fully play a role in the application of the distribution network. [0003] With the large-scale promotion and application of electric vehicles, a large number of charging piles ar...

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Problems solved by technology

[0003] With the large-scale promotion and application of electric vehicles, a large number of charging piles are connected to the distribution network, which poses a huge challenge to the safe and reliable operation of the power grid. Since the current charging pile system is completely focused on its own power consumption considerations, it does not consider the power supply capacity of the power grid. The disorderly installation and power consumption of charging piles will lead to a large increase in the power load of the power system, and the system will partially collapse. However, if only the load margin of the transformer output is simply increased, it may lead to a huge waste of equipment

[0004] With the current meter detection method, we can only know whether the power exceeds the standard statically, but cannot respond in real time to prevent the power load of the charging station from exceeding the standard

Due to the high power consumption of each charging pile in the charging station, once the entire charging station is put into use, its power load even exceeds the ordinary power load. This increase in charging power may cause the overall output power of the transformer to exceed it. rated power

Therefore, the putting into use of charging stations poses a serious challenge to the power distribution management of transformers, which also poses a threat to the safety of ordinary power consumption in the area.

[0005] It can be seen that there is an urgent need for a monitoring terminal that can measure the voltage and current of the power grid on the transformer side and the charging pile side in real time, and calculate the maximum power of the charging pile that can be started at present, so as to calculate the number of chargers and charging piles that can be put into operation. , avoiding the tripping of the circuit breaker and the degradation of the power quality of the power grid caused by too many charging piles starting to charge: including overload, frequency deviation exceeding the standard, harmonics exceeding the standard, voltage drop and other problems caused by a series of parameters that are not up to standard, ensuring the use of ordinary users Power quality is not affected

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