Storage battery charging-discharging system and control method thereof for new energy power generating system
A battery pack and power generation system technology, which is applied to battery circuit devices, current collectors, electric vehicles, etc., can solve problems such as the battery life of unstable large-capacity hybrid energy storage systems, and achieve the effect of extending the service life
Inactive Publication Date: 2012-11-21
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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[0011] The purpose of the present invention is to provide a charging and discharging system for a battery pack of a new energy power generation system and its control method, aiming to solve the battery life problem of the existing large-capacity hybrid energy storage system composed of unstable new energy
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[0028] In order to make the objectives, technical solutions and advantages of the present invention clearer and clearer, the technical methods of the present invention are further described below through the accompanying drawings and specific embodiments.
[0029] Refer to Table 1 for unstable energy, diesel engine and two sets of batteries without centralized control, and the state table of the system under different combinations.
[0030] As shown in the table, taking two sets of batteries as an example, the two sets of batteries are charged and discharged respectively, but without centralized control of them, the system will appear in the following states (the depth of discharge is designed according to 30% of the rated capacity of the battery):
[0031] State 1. The new energy continues to supply power and the bus voltage is stable, the diesel engine is turned off, the two sets of batteries can be charged and discharged in time, and the system is stable.
[0032] State 2. ...
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The invention discloses a storage battery charging-discharging system and a control method thereof for a new energy source power generating system. Each storage battery pack comprises a plurality of single batteries connected in parallel and is formed by connecting a plurality of parallel units connected in series; each storage battery pack is connected with one set of battery management system; the battery managing system is used for monitoring the voltage, the current, the resistance and the capacity state of the single batteries and playing a role of balancing the charging and the discharging; the storage battery pack is connected in parallel to a charger and a bus through a control switch; and a charging and discharging control method for the storage battery is used for controlling a charging switch and a discharging switch of each storage battery pack and a diesel engine switch. According to the storage battery charging-discharging system and the control method thereof disclosed by the invention, the service life of the battery can be prolonged to the maximum extent; by combining the characteristics of new energy sources with the diesel engine, the energy storage action and the voltage stabilizing action of the storage battery are fully exerted, the utilization efficiencies of the novel energy sources and the diesel engine are increased and the cost is reduced; and meanwhile, the online replacement of the battery is realized and powerful support for an energy-storage technology of an unstable new energy source power generating system is provided.
Description
technical field [0001] The invention relates to the technical fields of energy and electronics, and in particular to a battery pack charging and discharging system for an unstable new energy power generation system and a control method thereof, and is suitable for a battery pack composed of unstable new energy such as wind energy and wave energy and a diesel engine and a control method thereof. Energy storage of hybrid new energy power supply system. Background technique [0002] The worldwide environmental pollution and energy shortage have forced people to accelerate the development and research of new energy. In the process of finding and developing new energy sources, people have turned their attention to renewable energy sources including solar energy, wind energy, ocean energy and biomass energy. On the island, wind energy, wave energy and other energy sources are abundant, and the use of these new energy sources to generate electricity can save a lot of fossil fuel r...
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IPC IPC(8): H02J7/00H02J7/32H02J9/08
Inventor 冯自平吕杰宋文吉张千玉陈永珍
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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