System and method for combining distributed generation and distribution network in distribution network terminal

Abstract

The invention provides a system and a method for combining distributed generation and a distribution network in a distribution network terminal. A first acquisition and analysis module is arranged in the distribution network terminal, and the distribution network terminal acquires and processes the state quantity of a breaker by using the first acquisition and analysis module; a second acquisition and analysis module is arranged in the distribution network terminal, and the distribution network terminal acquires and processes analogue quantity information of a distributed power synchronization feeder line by using the second acquisition and analysis module; a third acquisition and analysis module is arranged in the distribution network terminal, and the distribution network terminal acquires a load condition and a running condition of the distribution network by using the third acquisition and analysis module; and a monitor is arranged in the distribution network terminal, and the distribution network terminal monitors the condition of a power storage unit by using the monitor and performs corresponding processes according to the acquired distributed power and the conditions of the distribution network and the power storage unit. By the system and the method, the problem in the combination of the distributed generation and a distribution system during distributed power synchronization running is solved.

Description

Technical field [0001] The present invention relates to the technical field of electric power supply and distribution, in particular to a grid-connected technology of a distribution network terminal and a distributed power supply. Background technique [0002] The electric power industry standard DL / T 721-2000 "Distribution network automation system remote terminal" defines the remote terminal of the distribution network automation system as: the remote terminal of the distribution network automation system is a variety of distribution circuits used in the distribution network A collective term for equipment such as electric remote terminals, remote terminals of distribution transformers, and medium voltage monitoring units (distribution automation and management system substations). The communication channel is used to complete functions such as data acquisition and remote control. [0003] Distributed Generation (DG for short) refers to the economical, efficient, and reliable po...

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Problems solved by technology

[0006] One of the technical problems to be solved by the present invention is to provide a system that combines distributed power generation and power distribution network in the distribution network terminal, so as to overcome the problems caused by the combination of distributed power generation and power distribution system in the process of existing distributed power generation and grid-connected operation. problems; by realizing the three-remote connection of the distributed power grid, the distributed power grid-connected system and the power distribution network can be separated when the distributed power grid-connected system exceeds the limit, so as to avoid affecting the normal operation of the power distribution network; Through the management of the energy storage unit, the distribution network terminal can continuously provide power to the user when the distributed power generation device is not working normally, and reduce the impact of the unstable output power of the distributed power generation on the power grid

[0007] The second technical problem to be solved by the present invention is to provide a method for combining distributed power generation and power distribution network in the distribution network terminal, so as to overcome the problems caused by the combination of distributed power generation and power distribution system in the process of existing distributed power generation and grid-connected operation. problems; by realizing the three-remote connection of the distributed power grid, the distributed power grid-connected system and the power distribution network can be separated when the distributed power grid-connected system exceeds the limit, so as to avoid affecting the normal operation of the power distribution network; Through the management of the energy storage unit, the distribution network terminal can continuously provide power to the user when the distributed power generation device is not working normally, and reduce the impact of the unstable output power of the distributed power generation on the power grid

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