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Hybrid energy storage system control method for reducing abandoned wind rate and tracking wind-power planned output

A hybrid energy storage system and planned output technology, which can be used in electrical energy storage systems, current collectors, electric vehicles, etc., to solve the problems of high energy density, limited application of battery energy storage systems, and short cycle life.

Active Publication Date: 2013-04-03
CHINA ELECTRIC POWER RES INST +1
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Problems solved by technology

Although each energy storage battery has its own advantages and disadvantages, in general, it generally has the characteristics of short cycle life, low power density, and high energy density, which limits the application of battery energy storage systems in occasions with severe wind power fluctuations.

Method used

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  • Hybrid energy storage system control method for reducing abandoned wind rate and tracking wind-power planned output
  • Hybrid energy storage system control method for reducing abandoned wind rate and tracking wind-power planned output
  • Hybrid energy storage system control method for reducing abandoned wind rate and tracking wind-power planned output

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Embodiment Construction

[0056] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0057] Such as figure 1 and figure 2 , the control strategy is based on the hybrid energy storage system composed of energy storage batteries and supercapacitors, and realizes active power classification and time-sharing control.

[0058] The present invention provides a hybrid energy storage system control method for reducing wind curtailment rate and tracking wind power planned output, said method comprising the following steps:

[0059] Step 1: The data acquisition module collects the real-time wind power P WG (t), wind speed v and current planned output P ref , and input the collected data into the data processing module;

[0060] Step 2: Calculate the theoretical wind power P according to the wind speed v WT (t);

[0061] Step 3: Compare the real-time power P of the wind power WG (t) and wind power theoretical power P WT (t), judging whether the...

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Abstract

The invention provides a hybrid energy storage system control method for reducing an abandoned wind rate and tracking a wind-power planned output, which comprises the following steps: collecting a wind-power real-time power PWG (t), a wind speed v and a current planned output Pref; calculating the wind-power theoretical power PWT (t); comparing the wind-power real-time power PWG (t) and the wind-power theoretical power PWT (t), and judging whether the abandoned wind is existed; calculating sliding average Prefb; reading a battery energy storage system charge state SOC value and a super capacitor terminal voltage Uc; respectively allocating a charging and discharging power Pbess (t) of the energy storage battery and a charging and discharging power Pc (t) of a super capacitor and then correcting an actual hybrid energy storage system output PESS (t). According to the method, the hybrid energy storage system is used by combining with the wind-power generation, so that the rate of abandoned wind is lowered and the deviation of the wind-power output and planned output is reduced to improve the ability of the wind-power for tracking the wind-power planned output.

Description

technical field [0001] The invention belongs to the technical field of wind power generation, and in particular relates to a hybrid energy storage system control method for reducing the rate of wind abandonment and tracking the planned output of wind power. Background technique [0002] As a clean energy, wind power has the advantages of renewable, low cost, no pollution, large energy and broad prospects, so it has become an important choice to realize the sustainable development of low-carbon power. However, due to the inherent randomness, intermittent and unschedulable characteristics of wind power, its large-scale grid connection will have many adverse effects on the dispatching operation of the power grid, and even threaten the safe and stable operation of the power grid. Seriously, seriously affect economic benefits. In order to reduce the impact of wind power on the power system, a certain scale of flexible and adjustable power supply is objectively required to match ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J15/00H02J7/00
CPCY02E70/30
Inventor 李建林房旭雪修晓青李蓓惠东
Owner CHINA ELECTRIC POWER RES INST
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