Micro-grid control method for communication-line-free interconnection based on frequency shift control
A control method and micro-grid technology, applied in electrical components, circuit devices, photovoltaic power generation, etc., can solve problems such as overvoltage, switching "gap closing shock, etc."
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[0122] Embodiment: what the present invention adopts is a kind of frequency-shift control technology, or is referred to as frequency-shift keying (frequency-shift-keying, FSK) technology again, and it is to use digital signal to modulate the frequency of carrier, in power system protection The field of communication is a well-applied technology, such as: FSK transceiver for high-voltage line protection, rated frequency range 50-400kHz, rated bandwidth of 4kHz, the normal operation is to send the frequency monitoring signal, the signal frequency f G Used for channel monitoring; when a fault occurs, send a command signal, and send the signal frequency f T , used to transmit the specified operation command. The carrier machine for high-voltage line protection adopts FSK technology, switches 5 frequencies in one channel, and normally transmits the monitoring frequency f G , transmit frequency hopping fA, fB, fC, f3 in case of failure. Frequency hopping fA, fB, and fC are divided...
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