Micro-grid autonomous frequency modulation and voltage regulation method and device based immune particle swarm optimization algorithm

Abstract

The invention discloses a micro-grid autonomous frequency modulation and voltage regulation method and device based on an immune particle swarm optimization algorithm. The safe and reliable operationof micro grid is ensured. The micro-grid autonomous frequency modulation and voltage regulation method comprises the steps of collecting current and voltage, detecting frequency, collecting measured values of active power and reactive power, calculating fitness function, calculating optimal droop control coefficient and calculating output active power command value and reactive power command value. The micro-grid autonomous frequency modulation and voltage regulation device is provided with a data acquisition module, a calculation module, a parameter optimization module, a command value acquisition module and a communication module. Compared with the prior art, the micro-grid autonomous frequency modulation and voltage regulation method and device adopt the immune particle swarm optimization algorithm to optimize droop control parameters, when the power system frequency and voltage offset or a micro-grid mode is switched, the droop control parameters of distributed generation (DG) areregulated and controlled in real time by detecting the frequency and voltage of a micro-grid system, and the frequency and voltage of micro-grid system are dynamically restored to a rated value so asto ensure the safe and reliable operation of the micro-grid.

Description

technical field [0001] The invention relates to a power control method and device, in particular to a microgrid control method and device. Background technique [0002] As energy and environmental issues become increasingly prominent, distributed generation control methods and devices continue to develop. The traditional power supply system has large power loss and high pollution, and users have increasingly strict requirements on power quality and safety. Therefore, renewable energy will gradually play an important role in the sustainable development of society and economy. Microgrid can effectively use new energy and renewable energy to generate electricity, and it is a powerful solution to the large-scale application of distributed power generation. The development of microgrids suitable for China's basic national conditions is an inevitable requirement for realizing the transformation of my country's new energy strategic structure, and it is also an important driving fo...

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Problems solved by technology

However, the defect of droop control is to achieve power regulation at the expense of voltage or frequency, and it is difficult to maintain voltage and frequency, which is not conducive to the safe and reliable operation of the microgrid.

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