An improved cycle controller, power quality controller and microgrid power quality control method

Abstract

The invention discloses an improved single-circle controller, an electric energy quality controller and a microgrid electric energy quality control method. The improved single-circle controller comprises a clock generating a clock signal, an integrator carrying out integration for controlled variables in a clock period, a comparator used for comparing an output value of the integrator with a reference value and outputting the result, and a NOT gate used for negating the output value of the comparator, wherein the output value of the comparator and an output value of the NOT gate form a PWM control signal. The improved single-circle controller is applied to a parallel voltage source inverter, the PWM output signal is made to be more stable, the structure is more simple, and influence of narrow pulse width on a reset signal is eliminated; in a permitted power scope, two or more voltage source inverters share a DC side reference voltage signal, through changing parameters of current sampling resistors of different voltage source inverter control modules, power and harmonic wave compensation demands of a sharing microgrid can be satisfied.

Description

technical field [0001] The invention relates to a micro-grid power quality control technology, in particular to an improved single-cycle controller, a power quality controller and a micro-grid power quality control method. Background technique [0002] Energy is an important foundation for the development and progress of human society. In recent years, the global energy crisis and environmental problems have become more and more serious, and various new energy sources have received more and more attention. Microgrid is an important way and link for new energy to connect to the grid, but distributed power sources in microgrids, such as wind energy, solar photovoltaic, etc., have problems such as volatility, randomness, and instability, which cannot be solved It achieves precise control. In addition, the microgrid also contains a large number of power electronic devices. In addition, there may be various nonlinear loads in the microgrid, which makes the power quality problem ...

AI Technical Summary

Problems solved by technology

Microgrid is an important way and link for new energy to connect to the grid, but distributed power sources in microgrids, such as wind energy, solar photovoltaic, etc., have problems such as volatility, randomness, and instability, which cannot be solved which enables precise control

In addition, the microgrid also contains a large number of power electronic devices. In addition, there may be various nonlinear loads in the microgrid, which makes the power quality problem of the microgrid increasingly prominent.

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