Microgrid coordinated control system based on RTnet real-time network protocol communication

Abstract

The invention relates to a microgrid coordinated control system based on RTnet real-time network protocol communication. The microgrid coordinated control system based on RTnet real-time network protocol communication is characterized in that the microgrid coordinated control system comprises a main controller and various in-situ terminals, the main controller comprises an industrial personal computer, a network interface, an input interface and an output interface, and the network interface, the input interface and the output interface correspond to the industrial personal computer; each in-situ terminal comprises an embedded controller, an A / D sampling circuit, an I / O interface circuit and a network interface, each A / D sampling circuit is connected to a microgrid to be used for collecting the analog quantity of a current and the analog quantity of voltage, each I / O interface circuit is connected to the microgrid to be used for collecting and controlling switching values, and the network interface of each in-situ terminal is connected with the network interface of the main controller through an RTnet real-time network. The microgrid coordinated control system is reasonable in design, the requirements for the real-time performance of the microgrid coordinated control system is met, the analog quantities of the current, the voltage and the like of dispersed devices in a microgrid system and the switching values such as the position of a circuit breaker do not need to be transmitted to a central control unit through cables, laying of the cables is avoided, and a wiring mode is simplified.

Description

technical field [0001] The invention belongs to the technical field of micro-grids, in particular to a micro-grid coordination control system based on RTnet real-time network protocol communication. Background technique [0002] The flexible operation mode and high-quality power supply service of the microgrid are inseparable from a perfect and stable control system. In the actual coordinated control of the microgrid, it is necessary to record in real time the current, voltage, power and other information collected by the slave stations such as the distributed power supply measurement and control terminal and the grid-connected protection measurement and control terminal, and transmit these information to the master station in real time. At the same time, The master station should also analyze and process the collected information in time, and transmit control parameters to the slave station. Constrained by the field environment of the microgrid, the distance between the ma...

AI Technical Summary

Problems solved by technology

Due to the constraints of the micro-grid site environment, the distance between the master station and the slave station is often relatively long, and the traditional fieldbus technology cannot guarantee the real-time performance of signal transmission

Therefore, the existing microgrid control system adopts the following two methods to solve the above existing problems. One is the simplest method, which is to connect the analog quantities such as current and voltage and the switching quantities such as the position of the circuit breaker directly to the main station through cables. However, this method needs to lay a large number of cables, and the wiring is complicated; another method is to use a coordinated control method in which the master station control decision and the slave station control decision are separated, but this method has poor systemicity, and the relationship between the master station and the slave station The time difference between them may cause the shortcomings of the master-slave decisions to conflict with each other

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