Design of P-f and Q-V droop controller in micro-grid

Abstract

The invention provides a P-f and Q-V droop controller in a micro-grid. Particularly, the micro-grid is a single closed loop feedback system, when DSP chips are utilized to design the droop controller, a droop control module is built on the basis of the principle of the droop controller, the sizes of P and Q are determined by the system and loads, a saturation module is additionally arranged, and then the system has certain anti-jamming capacity for faults or small perturbation. The saturation module is used for determining the fluctuation range of input signals, if the input signals are within the fluctuation range, the input signals are normally output, and if the input signals exceed the range, an upper limit or a lower limit is output. According to the P-f and Q-V droop controller, the voltage and the frequency of the system can be effectively controlled to be within a certain range, the utilization rate of electric energy is increased, and the purpose of protecting safety of electric equipment is achieved, and meanwhile the P-f and Q-V droop controller is simple in structure and high in operability.

Description

technical field [0001] The invention belongs to the field of microgrid and smart grid, and in particular relates to a microgrid controller. Background technique [0002] With the innovation and progress of science and technology and the development of economy, the use of electric energy is becoming more and more frequent. However, the stability of electric energy has long-standing problems, especially for small distributed power generation systems such as microgrids. At the same time, the analysis of the stability of the distributed generation system has always been a difficult point, so it is very necessary to analyze and control the stability of the voltage and frequency, which can achieve safe power consumption while promoting the development of new technologies. In the traditional microgrid droop controller, the size of P and Q is determined by the system and the load. If the circuit fails or receives a small disturbance, due to the fast response of the controller, it ca...

AI Technical Summary

Problems solved by technology

In the traditional microgrid droop controller, the size of P and Q is determined by the system and the load. If the circuit fails or receives a small disturbance, due to the fast response of the controller, it cannot protect the electrical equipment in time, resulting in damage to the electrical equipment. Therefore, it is necessary to improve this type of controller to make the system voltage and frequency easier to control, thus playing a positive role in promoting the development of microgrid technology and protecting related electrical equipment

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