Industrial roof distributed photovoltaic power station DC cabinet battery discharging control device
A distributed photovoltaic and discharge control technology, which is applied in the electronic field, can solve the problem of uncontrollable discharge of the battery of the DC screen, and achieve the effect of avoiding the loss of power generation
Active Publication Date: 2019-09-20
ZHEJIANG XINNENG PHOTOVOLTAIC TECH CO LTD
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Problems solved by technology
[0004] In view of this, the embodiment of the present invention provides a DC panel battery discharge control device for industrial rooftop distributed photovoltaic power plants to solve the problem of uncontrollable discharge of the existing DC panel batteries
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[0016] The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.
[0017] Such as figure 1 and figure 2 As shown, the DC panel battery discharge control device of the industrial rooftop distributed photovoltaic power station includes a battery BAT, a power-off delay relay 1, a DC contactor 2 and a charging module, wherein the DC contactor 2 is a normally open DC contactor. The coil part of the power-off delay relay 1 is used to connect with the secondary side of the station transformer T1, and one end of the open-close contact of the power-off delay relay 1 is used to connect the positive pole of the DC output bus of the DC screen, and the power-off delay relay The other end of the disconnecting and closing contact of 1 is connected to the input side of the coil part of the DC contactor...
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The invention provides an industrial roof distributed photovoltaic power station DC cabinet battery discharging control device to solve the uncontrollable discharging of a DC cabinet battery in the prior art. The industrial roof distributed photovoltaic power station DC cabinet battery discharging control device comprises a battery BAT, a power-off delay relay and a DC contactor. The coil part of the power-off delay relay is intended to be connected with the secondary side of a substation transformer T1. One end of the turned-off normally open contact of the power-off delay relay is intended to be connected to the positive pole of the DC cabinet DC output bus. The other end of the turned-off normally open contact of the power-off delay relay is connected to the input side of the coil part of the DC contactor. The output side of the coil part of the DC contactor is intended to be connected to the negative pole of the DC cabinet DC output bus. The battery BAT is connected to the DC cabinet DC output bus through a switch QF. The contact of the DC contactor and the switch QF are connected in parallel. The control device can intelligently control the charging and discharging of the battery, and avoids the adverse effects of power exhaust of the battery on the power generation of a photovoltaic power station.
Description
technical field [0001] The invention belongs to the field of electronic technology, and relates to a control device, in particular to a discharge control device for DC screen accumulators of industrial rooftop distributed photovoltaic power stations. Background technique [0002] China is currently the world's first energy producer and consumer country. Energy demand and supply continue to grow. Vigorously developing renewable energy including photovoltaics has become the trend of national energy transformation. The cumulative installed capacity of solar photovoltaic power stations should reach 150GW, of which Including 70GW distributed power stations and 80GW ground centralized power stations. [0003] The medium-sized distributed photovoltaic power station switching station connected through 10-35kV voltage level is generally mainly composed of grid-connected access cabinets, metering cabinets, voltage transformer cabinets, step-up transformer outlet cabinets, and DC scree...
Claims
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IPC IPC(8): H02J3/38H02J7/00
CPCH02J3/383H02J7/0022H02J7/0026Y02B10/10Y02E10/56Y02P80/20
Inventor 熊磊陈建军张勤华张宏候
Owner ZHEJIANG XINNENG PHOTOVOLTAIC TECH CO LTD