Off-grid photovoltaic VRLAB (Valve Regulated Lead Acid Battery) energy storage control device and working method thereof
An energy storage control, off-grid technology, applied in photovoltaic power generation, circuit devices, battery circuit devices, etc., can solve problems such as increasing the economic burden of small off-grid photovoltaic systems, increasing the operating cost of photovoltaic systems, and failing to achieve refined control. , to achieve the effect of easy implementation and control, improved charging and discharging efficiency, and strong real-time processing capability
Active Publication Date: 2014-12-31
STATE GRID CORP OF CHINA +2
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Problems solved by technology
At present, the control of the storage battery in the photovoltaic power generation system mostly adopts extensive management, and the charging and discharging process has not been finely controlled. Poor performance and low battery utilization often lead to waste of resources, increase the operating cost of the photovoltaic system, and increase the economic burden of users of small off-grid photovoltaic systems
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[0031] The invention provides a small off-grid photovoltaic VRLAB energy storage control device (see figure 1 ), which is composed of a photovoltaic array, a filter unit, an energy management unit, a VRLAB unit, a DC / DC converter, and a DC / AC converter; wherein, the photovoltaic array is unidirectionally connected to the DC / DC converter through the filter unit , It is unidirectionally connected with the energy management unit; the energy management unit is bidirectionally connected with the VRLAB unit; the VRLAB unit is bidirectionally connected with the output terminal of the DC / DC converter; the output terminal of the DC / DC converter is connected with The DC load is unidirectionally connected, and is unidirectionally connected to the AC load via the DC / AC converter.
[0032] The filtering unit (see figure 2 ) Is composed of a capacitor C1, a capacitor C2, a resistor R, and an inductor L; wherein the two ends of the capacitor C1 are respectively connected to the output end of th...
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The invention relates to an off-grid photovoltaic VRLAB (Valve Regulated Lead Acid Battery) energy storage control device and a working method thereof. The off-grid photovoltaic VRLAB energy storage control device comprises a photovoltaic array, a filtering unit, an energy management unit, a VRLAB unit, a DC / DC (Direct Current) converter, a DC / AC (Alternating Current) converter, a DC load and an AC load, wherein the photovoltaic array is unidirectionally connected with the DC / DC converter through the filtering unit, and is unidirectionally connected with the energy management unit, and the energy management unit is bidirectionally connected with the VRLAB unit; the VRLAB unit is bidirectionally connected with the output end of the DC / DC converter, and the output end of the DC / DC converter is unidirectionally connected with the DC load and is unidirectionally connected with the AC load through the DC / AC converter. The off-grid photovoltaic VRLAB energy storage control device provided by the invention has the beneficial effects of effectively improving the power generation efficiency of a small off-grid photovoltaic system, improving charging and discharging efficiency and prolonging the life of an energy storage device by taking VRLAB grouping switch operation and combined charging and discharging control strategies, and having simple structure of external equipment, mature and stable technology, and easiness in implementation and control.
Description
Technical field [0001] The invention belongs to the field of new energy power generation system control, in particular to an off-grid photovoltaic VRLAB energy storage control device and a working method thereof. Background technique [0002] In recent years, the new energy industry and distributed power generation technology have developed rapidly, especially wind energy and photovoltaic power generation have been widely promoted in remote areas, urban buildings and other occasions. Due to the intermittent and volatile characteristics of wind energy and photovoltaic power generation, the introduction of energy storage devices can effectively solve the problem of power quality and improve the utilization rate of primary energy and the efficiency of the power generation system. [0003] Batteries are the most common energy storage device in distributed power generation systems. With the development of modern manufacturing technology, Valve Relation Lead Acid Battery (VRLAB) has mat...
Claims
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Login to view more IPC IPC(8): H02J7/35H01M10/44
CPCY02E10/56Y02E60/10
Inventor 马步云代志纲翟化欣刘海旭李龙董文琦任巍曦岳巍澎王铮牛虎
Owner STATE GRID CORP OF CHINA
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