Modular solar off-grid and grid-connected inverse control all-in-one machine

Abstract

The invention discloses a modular solar off-grid and grid-connected inverse control all-in-one machine comprising a chassis. A plurality of power modules are arranged in the chassis, and a bypass module is arranged in the chassis. The power modules and the bypass module are both of standard cabinet size, and the rear ends of the power modules and the bypass module are provided with connectors. Theconnectors are connected with the chassis in a pluggable mode. The mains input of the power modules and the input of the bypass module are connected in parallel with external mains. The power parts inside the system are made into the power modules with the same specification, the static part of the bypass is made into the bypass module, a plurality of power modules and one bypass module are combined into a complete machine with different power sizes. All the modules are structurally designed to be of standard cabinet size. The rear part of each module is connected with the chassis by the pluggable connector, and the modules can be directly unplugged and plugged in case of installation or disassembling of the modules so as to be simple and convenient and can be operated by a single person.

Description

technical field [0001] The invention relates to the technical field of circuit equipment, in particular to a modularized solar off-grid and inverse control integrated machine. Background technique [0002] The currently applied solar off-grid inverters are mainly divided into two architectures in principle: 1. Single inverter plus MPPT controller architecture, this architecture is basically the same as the conventional grid-connected inverter architecture, basically also by grid-connected The machine with this structure is connected to the grid to generate electricity when the mains power is normal, and the inverter supplies power off the grid when the mains power is abnormal. The advantage is low cost; the disadvantage is that the power supply quality is poor and the working range of the mains power 2. Directly install the grid-connected inverter, MPPT controller and off-grid inverter together to form an off-grid system, because this architecture has two A separate inverte...

AI Technical Summary

Problems solved by technology

[0002] The currently applied solar off-grid inverters are mainly divided into two architectures in principle: 1. Single inverter plus MPPT controller architecture, this architecture is basically the same as the conventional grid-connected inverter architecture, basically also by grid-connected The machine with this structure is connected to the grid to generate electricity when the mains power is normal, and the inverter supplies power off the grid when the mains power is abnormal. The advantage is low cost; the disadvantage is that the power supply quality is poor and the working range of the mains power 2. Directly install the grid-connected inverter, MPPT controller and off-grid inverter together to form an off-grid system, because this architecture has two A separate inverter, so the cost is high, but the quality of power supply is good, and the working range of mains power is wide. At present, the tower structure design is mostly used in the market, so that many ready-made components can be used for splicing, and the design cycle is short.

[0003] The above two structures are currently available in the market as tower structures. According to market research, solar off-grid systems are mostly used in residential, office, and factory applications. These applications require various power (ranging from 10kVA to 1000kVA), supply Short cycle, convenient after-sales, and because the market is basically in foreign countries, dealers also have high requirements for transportation, inventory, etc., it is difficult for the tower structure to meet these requirements. Network and reverse control all-in-one machine to solve the problems in the existing technology

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