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An Active Power Optimal Scheduling Method for Smoothing Photovoltaic Power Fluctuations

A technology for optimizing scheduling and active power, applied in photovoltaic power generation, reducing/preventing power oscillation, reducing greenhouse gases, etc.

Active Publication Date: 2018-01-19
CHINA ELECTRIC POWER RES INST +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are very few patents, documents, technical reports, etc. on the power allocation method of fully considering the state of charge of the battery pack in the power allocation of the energy storage power station to guide the dispatching command, and it needs in-depth research and exploration

Method used

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  • An Active Power Optimal Scheduling Method for Smoothing Photovoltaic Power Fluctuations
  • An Active Power Optimal Scheduling Method for Smoothing Photovoltaic Power Fluctuations
  • An Active Power Optimal Scheduling Method for Smoothing Photovoltaic Power Fluctuations

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Embodiment Construction

[0072] like figure 2 As shown, an active power optimal scheduling method for smoothing photovoltaic power fluctuations, the method includes, the energy storage power station scheduling system includes a two-layer structure of the real-time scheduling layer of the system and the power distribution layer in the station, and the power distribution layer responds to the real-time scheduling of the scheduling layer in real time Instructions to realize the optimal distribution of power in the energy storage power station. The energy storage power station includes battery packs A of different types and parameters n(n=1,...,N), each energy storage branch consists of a storage converter (PCS), a battery management system (BMS) and a battery stack (BP); where P ES (h) is the scheduling instruction of the real-time scheduling layer in the hth scheduling cycle, P n (h) is the power allocated for the nth energy storage branch in the hth dispatch period.

[0073] like figure 1 As shown...

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Abstract

The invention relates to an active power optimal dispatching method for suppressing photovoltaic power fluctuation. The method comprises: reading distributed photovoltaic generated power of an hth dispatching period, outputting an ultra short time predicted value PPV(h) and an ultra short time load prediction value PL(h), calculating an active power dispatching instruction PES(h) of an energy storage power station; according to real-time acquired operating state uk (h) and carrying capacity SOCk(h) of each battery pack of the energy storage power station, defining three kinds of dispatching states of the battery packs; determining the active power dispatching instruction of the energy storage power station, according to power distribution priority principle that priority dispatching can optimize charging and discharging battery packs and post-dispatching cannot optimize the charging and discharging battery packs, and according to priority proportional distribution, and using a power distribution strategy of rated power distribution, calculating power values distributed to each battery pack in a current dispatching period; and summarizing the active power dispatching instruction of each battery pack, and sending to the energy storage power station. The method reduces overcharging and over-discharging of battery packs, and prolongs life of the battery packs.

Description

technical field [0001] The invention relates to an optimal scheduling method, in particular to an active power optimal scheduling method for smoothing photovoltaic power fluctuations. Background technique [0002] Distributed photovoltaic power generation has the characteristics of small single-point access capacity, scattered multi-point arrangement, and unstable output, which will cause violent fluctuations in regional power flow and node voltage, increase the difficulty of distribution network operation control, and reduce the system's impact on distributed photovoltaic power generation. capacity, and have an impact on the stable operation of the distribution network. Configuring an energy storage system can effectively solve a series of problems brought about by the access of distributed photovoltaic power generation, which is mainly reflected in: 1) smoothing the volatility of distributed photovoltaic power generation and enhancing controllability; 2) tracking the plann...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/24H02J3/28
CPCY02E10/56Y02E70/30
Inventor 陶琼汪春叶季蕾薛金花桑丙玉许晓慧夏俊荣刘海璇李春来李正曦杨立斌杨军王东方张海宁刘皓明陆丹
Owner CHINA ELECTRIC POWER RES INST