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Method and system for adjusting energy in photovoltaic building

An energy regulation and photovoltaic technology, applied in the field of power systems, can solve the problems of unreasonable use of translatable loads, low photovoltaic self-consumption rate, and unreasonable distribution of system energy purchase and sale, so as to improve the photovoltaic self-consumption rate and improve Economical, the effect of reducing electricity purchase costs

Active Publication Date: 2015-11-18
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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Problems solved by technology

[0004] In general photovoltaic buildings, the load power consumption curve does not completely match the photovoltaic power curve, so the resources of the photovoltaic system cannot be fully utilized, and the photovoltaic self-consumption rate in photovoltaic buildings is not high; This leads to unreasonable allocation of system energy purchase and sale, unnecessary grid power purchase expenses, and economical efficiency needs to be improved

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  • Method and system for adjusting energy in photovoltaic building
  • Method and system for adjusting energy in photovoltaic building

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Embodiment approach

[0093] Preferably, the calculated current preferred magnitude of the translatable load can be corrected according to the step change characteristics of a single translatable load. The principle is: since the load characteristic of a single translatable load changes in steps, the size change of adjusting the translatable load is discontinuous, and may not be completely consistent with the calculated current preferred translatable load. The actual load of the translational load can be corrected. As a preferred implementation, the correction method can be:

[0094] First freely combine all the translatable loads in the photovoltaic building, and calculate the load size corresponding to each combination; then compare the load size corresponding to each combination with the current preferred translatable load size, and find out the absolute difference between the two For the combination with the smallest value and a difference less than 0 (that is, the load size is smaller than th...

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Abstract

The invention relates to a method and system for adjusting the energy in a photovoltaic building. The method includes obtaining training sample optimized database according to historical operation data; determining whether the current moment is at a high electricity price period; if yes, determining optimal training samples from the training sample optimized database, and obtaining the magnitude of current optimal shiftable loads based on current photovoltaic power of the photovoltaic building and basic load information; if no, calculating the energy difference of the current photovoltaic power and the basic load of the photovoltaic building to obtain the magnitude of current optimal shiftable loads; and adjusting the shiftable loads of the photovoltaic building according to the magnitude of the current optimal shiftable loads to adjust the current operation energy. The photovoltaic self-absorption rate of a photovoltaic building system is effectively improved, power cost for buying electricity of a power grid is lowered, and the method and system make the operation of a photovoltaic building more economical.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a method and system for energy regulation in photovoltaic buildings. Background technique [0002] Photovoltaic (PVorphotovoltaic), the abbreviation of solar photovoltaic power generation system, is a new type of power generation system that uses the photovoltaic effect of solar cell semiconductor materials to directly convert solar radiation energy into electrical energy. There are two types of independent operation and grid-connected operation. Way. With the continuous development of photovoltaic renewable energy and the deepening of related research, photovoltaic cells as a distributed power supply for intelligent buildings have also attracted attention. [0003] In the photovoltaic building environment, there are photovoltaic systems as distributed power sources, and the loads include basic loads and shiftable loads. The so-called basic load refers to loads with relatively fixe...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/14H02J3/00
CPCY02B70/3225Y04S20/222
Inventor 李鹏郭晓斌许爱东雷金勇于力马溪原魏文潇刘念邹福强
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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