Coordination control method for micro-grid system

Abstract

The invention discloses a coordination control method for a micro-grid system. The coordination control method of the micro-grid system comprises the steps of: (1) performing program initialization of a coordination control system; (2) processing a digital switching value, and carrying out information interaction with a micro-grid energy management system, a liquid crystal display module and an in-place controller; (3) processing data of obtained information; (4) judging the working condition of the micro-grid, and calling a corresponding control program module based on the type of the working condition of the micro-grid; and (5) calculating the power command value of each running device, sending a signal to each running device of the micro-grid after the safety economic index satisfying with each running device is confirmed and adjusting the running state of the system by the control program module. The coordination control method for the micro-grid system realizes coordination control on the micro-grid system, and ensures safe and steady operation of the micro-grid. By adopting the modular software design and shortening the code of each software module, the coordination control method for the micro-grid system can remove software errors to the maximum extent and therefore greatly improve reliability of the software.

Description

technical field [0001] The invention relates to the field of electric power systems, in particular to a coordinated control method for a microgrid system. Background technique [0002] Microgrid is a small low-voltage system composed of distributed generation, energy storage and load. The internal power supply of the microgrid is mainly clean energy, and the conversion of electric energy is mainly realized by power electronic equipment. The microgrid achieves the balance of power within the network through control, and can be connected to the grid or run independently. Compared with the external grid, it is a single autonomous controlled unit, which can meet the needs of users for power quality and power supply security. [0003] The microgrid can adopt grid-connected and off-grid operation modes, and in these two modes of operation, the operation control methods and objectives of the microgrid are quite different. During grid-connected operation, since the overall capacit...

AI Technical Summary

Problems solved by technology

When the island is running, the microgrid is disconnected from the distribution network. Due to the use of a large number of power electronic devices as interfaces, the system has little or no inertia, poor overload capacity, and the intermittent nature of the output power of distributed power generated by renewable energy. The variability of load power increases the difficulty of microgrid frequency and voltage control

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