Controller applied to portable generator and control method

Abstract

The invention discloses a controller applied to a portable generator and a control method, and relate to the technical field of power distribution. The controller comprise a mains supply signal sampling input module, a power generation signal sampling input module, a low-pass filtering module, a comparison circuit, an MCU, an excitation control module, a rotating speed control module and a circuit breaker monitoring control module. Signal acquisition is carried out on commercial power and power generation, after the signals are filtered by alow-pass filter, the commercial power and the power generation signals are compared through a comparison circuit, the power generation signals are adjusted according to the comparison result, power generation and commercial power are consistent, and synchronous switching of commercial power and power generation is achieved through control of the MCU. The controller has the advantages that an existing portable generator of an emergency generator car and the like can be replaced and transformed, an original controller only provided with a start-stop generator is replaced, the requirement for uninterrupted power supply for power consumers is met, the emergency generator is controlled to be consistent with the mains supply in voltage, frequency and phase sequence all the time, and synchronization and consistency of power generation and commercial power can be conveniently realized.

Description

technical field [0001] The invention relates to the technical field of power distribution, in particular to a portable generator controller and a control method thereof. Background technique [0002] As we all know, most of the electricity used in our daily production and life is alternating current, which is supplied by the mains power distribution network. In some special cases where the mains fails, the power output of the portable generator is needed as an emergency. However, in some important occasions, it is necessary that the power supply is not interrupted when the mains needs to be withdrawn. In this way, it is necessary to disconnect the mains output after the emergency power generation supply can intervene in advance. In the power distribution system, the requirements for the uninterrupted power supply of power users are getting higher and higher, especially the "power protection" in some important occasions requires that the user's load cannot be powered off for...

AI Technical Summary

Problems solved by technology

However, the electrical characteristics of the generator's power output are often random. If the generator's output is forced to be connected in parallel with the mains, it is very likely that a short circuit will occur at the parallel connection point due to the difference in voltage, frequency, and phase sequence between the two.

The general portable generator controller only controls the generator to start and stop, and controls the generator to output at a certain constant voltage and frequency, and cannot realize the input, comparison and generation adjustment of the mains and power generation.

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