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实用新型
CN202798125U 一种光伏并网逆变器控制装置的冗余供电系统 失效 - 权利终止 转让

一种光伏并网逆变器控制装置的冗余供电系统
摘要：
本实用新型涉及一种光伏并网逆变器控制装置的冗余供电系统，包括分别由电网和太阳能电池板提供供电电源为光伏并网逆变器控制装置冗余供电的电网供电子系统和太阳能电池板供电子系统，还包括由外部工业用电为光伏逆变器控制装置供电的外部工业用电供电子系统，所述三个供电子系统分别通过各自连接的二极管设置供电优先等级构成冗余供电；本实用新型的通过对内取电、外取电以及电池板直流取电通过二极管设置供电优先级给并网逆变器控制系统供电，既可以满足光伏逆变器低电压穿越状况下控制系统供电需求，同时在正常工作下逆变器控制系统均由外部工业用电提供，价格低，有效的减小了光伏电站并网逆变器运行成本。
摘要（英）：

The utility model relates to a redundant power supply system of a photovoltaic grid-connected inverter control device. The redundant power supply system comprises a power grid power supply subsystem, a solar cell panel power supply subsystem and an external commercial power supply subsystem, wherein the power grid power supply subsystem and the solar cell panel power supply subsystem respectively utilize a power grid and a solar cell panel to supply power to the photovoltaic grid-connected inverter control device; and the external commercial power supply subsystem supplies external commercial power to the photovoltaic grid-connected inverter control device. The three power supply subsystems set power supply precedence level respectively through diodes connected with the three power supply subsystems to achieve redundant power supply. By setting power supply precedence level to internal power taking, external power taking and cell panel direct current power taking through the diodes, power is supplied to a grid-connected inverter controll system. Therefore, power supply needs of the control system under the low voltage ride through condition of a photovoltaic inverter can be met. Besides, external industrial power is supplied to the inverter control system under normal working, so that the price is low, and operation cost of the photovoltaic power station grid-connected inverter is effectively reduced.

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