Controller suitable for grid-connected inverter and power supply method of secondary system
A power supply method and secondary system technology, applied in the direction of AC network load balancing, single-network parallel feeding arrangement, etc., can solve the problems of increased workload, low reliability, lack of voltage stabilization function, etc., to delay power outages time, ensuring reliability, and ensuring the effect of low voltage ride-through capability
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[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0024] Such as figure 1 The shown embodiment 1, a controller suitable for grid-connected inverters disclosed in this embodiment, has three voltage output terminals, and the grid port 1 of the grid-connected inverter is sequentially connected with miniature circuit breakers, single-phase Power frequency transformer 201, single-phase uncontrolled rectifier bridge 301, several parallel electrolytic capacitors 401 and DC / DC converter 501; miniature circuit breaker controls on-off of the entire grid-connected inverter controller, single-phase power frequency transformer 201 Power is taken from the grid port 1 and converted into 220V AC, which is output through the first AC output terminal 6 and used to supply power to electrical equipment such as fans and heaters. At the same time, the 220V AC power obtained by the single-phase power frequency transformer 2...
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