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An energy management method for energy systems to stabilize photovoltaic power fluctuations

A power fluctuation and energy system technology, applied in energy storage, photovoltaic power generation, reducing/preventing power oscillation, etc., can solve problems such as frequent charging and discharging, affecting economic performance, etc., and achieve the effect of ensuring overall power and smoothing random fluctuations

Active Publication Date: 2019-01-22
BEIJING SHOTO ENERGY STORAGE TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The energy management of the existing distributed energy system usually sets the absolute value of the photovoltaic power to set the energy storage scheduling command, which fails to make full use of the characteristic that the change of photovoltaic power has a certain inertia, which may cause frequent charging and discharging, affecting the overall economic performance

Method used

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  • An energy management method for energy systems to stabilize photovoltaic power fluctuations
  • An energy management method for energy systems to stabilize photovoltaic power fluctuations
  • An energy management method for energy systems to stabilize photovoltaic power fluctuations

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Embodiment 1

[0035] The present invention is specifically described below in conjunction with accompanying drawing, as Figure 1-2 as shown,

[0036] An energy management method for energy systems to stabilize photovoltaic power fluctuations:

[0037] In step S01: After the data cycle update starts, firstly obtain the real-time power P(t) of the current sampling point of photovoltaic power generation, the power P(t-1) at the first sampling moment, and the power P(t-1) at the first two sampling moments -2);

[0038] In step S02: calculate the current real-time power difference Δ(t)=p(t)-P(t-1), Δ(t-1)=p(t-1)-P(t-2);

[0039] In step S03: determine whether the current real-time power difference Δ(t) satisfies the following two conditions at the same time:

[0040] ①The current real-time power difference △(t) is greater than 0;

[0041] ②The current real-time power difference △(t) is greater than the incremental setting threshold p+;

[0042] If the current real-time power difference △(t...

Embodiment 2

[0062] Such as Figure 3-4 Shown:

[0063] An energy management device for an energy system that stabilizes photovoltaic power fluctuations, the device includes an energy management module, a photovoltaic power generation module, and an energy storage module; the energy management module is used to monitor the power output of photovoltaic power generation in real time, and further perform power scheduling on the energy storage unit , to realize its charge and discharge management; the photovoltaic power generation module is used to supply power to the load; the energy storage module absorbs or outputs part of the power according to the increase or decrease of the photovoltaic power.

[0064] According to the second embodiment, the present invention provides an energy system energy management device for stabilizing photovoltaic power fluctuations, including photovoltaic power generation units, energy storage units and loads, wherein the photovoltaic power generation and energy ...

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Abstract

The invention discloses an energy system energy management method capable of stabilizing photovoltaic power fluctuation. The method includes: acquiring the real-time power P(t) of the current sampling point of photovoltaic power generation, the real-time power P(t-1) of a previous sampling point and the real-time power P(t-2) of a sampling point previous to the previous sampling point; calculating a current real-time power difference delta(t) and the power difference delta(t-1) of a previous sampling moment; judging the delta(t), judging the power difference delta(t-1) of the previous sampling moment if the delta(t) satisfies conditions, issuing a power scheduling instruction to a bidirectional converter of an energy storage unit, and waiting for the start of next data cycle update. The energy system energy management method has the advantages that an energy management system based on photovoltaic power change can achieve the output tracking change of a distributed energy system, stabilize the random photovoltaic power fluctuation and guarantee the overall power stability of the distributed energy system.

Description

technical field [0001] The invention relates to an improvement of an energy management method for a distributed energy system considering photovoltaic power inertia, in particular an energy management method for a distributed energy system that stabilizes fluctuations in photovoltaic power. Background technique [0002] The energy management of the existing distributed energy system usually sets the absolute value of the photovoltaic power to set the energy storage scheduling command, which fails to make full use of the characteristic that the change of photovoltaic power has a certain inertia, which may cause frequent charging and discharging, affecting the overall economic performance. Contents of the invention [0003] The object of the present invention is to solve the above-mentioned problems and design an energy management method for an energy system that stabilizes photovoltaic power fluctuations. [0004] To achieve the above object, the technical solution of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/24H02J3/32H02J3/38
CPCH02J3/24H02J3/32H02J3/383Y02E10/56Y02E70/30
Inventor 王平唐西胜邓卫裴玮巩志贵高建强
Owner BEIJING SHOTO ENERGY STORAGE TECH CO LTD