Microgrid controller

Abstract

The invention discloses a microgrid controller in the field of power transmission and distribution. The microgrid controller comprises a central processor, a communication module and a single board computer relay protection module. The communication module comprises a bus interface module, a current and voltage measuring module, an AI / DI module and an AO / DO module. The bus interface module is provided with bus interfaces corresponding to all distribution power sources, energy storing devices and load controllers in a microgrid, a serial bus interface for being connected with the single board computer relay protection module, and an Ethernet interface for being connected with the central processor. The communication module is internally provided with an uplink communication module for being connected with a real-time digital simulation system. The central processor sends a simulation request to the real-time digital simulation system through the bus interface module and the uplink communication module in the communication module, and receives the simulation result. The microgrid controller has the advantages that the on-line real-time digital simulation system can be supported, microgrid variable parameters can be protected and controlled, and the protection and control performance of the microgrid controller for the microgrid can be improved.

Description

technical field [0001] The invention relates to a microgrid controller in the field of power transmission and distribution. Background technique [0002] Micro-grid refers to a self-made micro-grid system that can realize self-control, protection and management. The emergence of microgrid stems from the development of distributed new energy sources such as photovoltaics and wind power and the demand for efficient energy utilization. The distributed power sources that make up the microgrid are diverse and intermittent. Weak, the power flow and short-circuit current in different states vary greatly. [0003] The above-mentioned characteristics of the microgrid put forward higher requirements for its control and protection. like figure 1 As shown, the current microgrid controller is generally an independent system, including a central processing unit 1 , a communication module 2 and a single-board computer relay protection module 3 . The communication module 2 includes a bu...

AI Technical Summary

Problems solved by technology

The microgrid controller operates independently according to the established control strategy, and its control model and parameters are relatively fixed. It is difficult to fully and accurately reflect the changes in the control parameters and protection parameters of the microgrid controller in different operating modes and states, and cannot support The real-time digital simulation system performs decision support and other auxiliary functions for the control of microgrid operation

Therefore, the use of traditional passive fixed-value control and protection micro-grid controllers in the distribution network will greatly reduce the reliability or efficiency of the micro-grid operation.

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