Energy scheduling method, device and system for grid-connected photovoltaic energy storage system
A technology of energy scheduling and photovoltaic energy storage, applied in photovoltaic power generation, circuit devices, load forecasting in AC networks, etc., can solve the problems of low energy utilization rate of photovoltaic energy storage systems, and achieve the effect of improving energy utilization rate
Active Publication Date: 2019-07-23
GUANGDONG UNIV OF TECH
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However, with the increase of the installed capacity of photovoltaic power generation systems and the operation of photovoltaic energy storage systems in the mode of "spontaneous self-use and surplus on the grid", a single battery management system can only manage the charging and discharging of energy storage batteries to meet the needs of photovoltaic storage. The demand for increased energy system components and functional expansion will lead to a relatively low energy utilization rate of the grid-connected photovoltaic energy storage system
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[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0051] see figure 1 , which shows a flow chart of an energy scheduling method for a grid-connected photovoltaic energy storage system provided in an embodiment of the present invention. The embodiment of the invention provides an energy dispatching device for a grid-connected photovoltaic energy storage system. Therefore, in the embodiments of the present application, the execution subject is the energy dispatching device for description. An energy scheduling...
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The invention discloses an energy scheduling method, device and system for a grid-connected photovoltaic energy storage system, equipment and a computer readable storage medium. The method comprises the steps: obtaining historical meteorological data, and obtaining the photovoltaic power generation power Pt of a photovoltaic power generation system in a prediction time period according to the historical meteorological data; collecting historical load consumption power, and obtaining load consumption power Pload of the load in a prediction time period according to the historical load consumption power; obtaining the charging and discharging power Pbat of the energy storage system in a prediction time period and the power of a power grid in the prediction time period, and establishing a power balance equation: Pt+Ng*Pgrid=Pbat+Pload+Pwt; and performing energy scheduling according to the power balance equation and a preset principle, wherein the preset principle is that the photovoltaic power generation system preferentially supplies power, the energy storage system preferentially discharges electricity at the peak stage, and the energy storage system preferentially charges electricity at the valley stage. According to the technical scheme, the power of the photovoltaic power generation system, the load, the energy storage system and the power grid is considered during energy scheduling, so that the energy utilization rate of the grid-connected photovoltaic energy storage system is improved.
Description
technical field [0001] The present invention relates to the technical field of photovoltaic power generation and energy storage, and more specifically, relates to an energy scheduling method, device, system, equipment and computer-readable storage medium of a grid-connected photovoltaic energy storage system. Background technique [0002] With the rapid development of the global economy, the problem of energy shortage is becoming more and more serious. One of the best ways to solve this problem is to effectively utilize solar energy. However, photovoltaic power generation systems are often difficult to provide a stable power supply source for loads due to the constraints of photovoltaic intermittent and uncertainties. Therefore, at present, the commonly used method is to combine the energy storage system with the photovoltaic power generation system, and store or release electric energy through the energy storage system to supply power to the load. [0003] At present, in o...
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IPC IPC(8): H02J3/38H02J3/32
CPCH02J3/383H02J3/32H02J3/003H02J2203/20Y02E70/30Y02E10/56
Inventor 黄志洪武小梅
Owner GUANGDONG UNIV OF TECH