Control method of battery energy storage system for peak clipping and valley filling in distribution network

A technology of a battery energy storage system and a control method, which is applied in the field of power systems, can solve the problems of reducing the annual maximum load utilization hours of equipment, reducing the investment economy of power equipment, and low utilization of social resources, etc. Economic and environmental benefits, favorable effects for stability

Active Publication Date: 2013-09-18
STATE GRID CORP OF CHINA +2
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Problems solved by technology

This will cause the scale of power equipment in the links of generation, transmission, and distribution to increase with the increase of the annual maximum load, but the annual maximum load utilization hours of the equipment will decrease, reducing the economi

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  • Control method of battery energy storage system for peak clipping and valley filling in distribution network
  • Control method of battery energy storage system for peak clipping and valley filling in distribution network
  • Control method of battery energy storage system for peak clipping and valley filling in distribution network

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Embodiment Construction

[0048] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0049] The control method of the battery energy storage system for peak-shaving and valley-filling of the distribution network proposed in this embodiment, the control system of the distribution network for peak-shaving and valley-filling is composed of a historical database, a data acquisition module, a load forecasting system, and data analysis and processing modules, power constraint modules, and battery energy storage system modules, such as figure 1 shown.

[0050] This embodiment is based on the historical database, selects data that is the same as the forecast day and has similar weather, uses the support vector machine method to predict the forecast day load, and calculates the peak value and valley value of the day's load according to the load forecast value, and sets them as P rg (determined by the capacity co...

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Abstract

The invention discloses a control method of a battery energy storage system for peak clipping and valley filling in a distribution network. The control method comprises the following steps: obtaining a daily load curve on a predicted day according to a load predicating method, and computing the peak value and valley value of the daily load curve; setting a synthesis output valley value after participation of the energy storage system, and setting an initial value of synthesis output peak value; comparing predicated daily load data with the synthesis output valley value and the initial value of synthesis output peak value which have been set, and judging as follows: if the load data is smaller than the synthesis output valley value, charging the energy storage system to complete valley filling; and if the load data is larger than the initial value of synthesis output peak value, discharging the energy storage system to complete peak clipping, so that the synthesis output after energy storage adjustment reaches to the initial value of synthesis output peak value. At the peak and valley moments according to the load curve, the energy storage system is set to be charged once and discharged twice within one day, the requirement of peak clipping and valley filling can be achieved, and charging and discharging balance every day can be kept, so that the service life of the battery is prolonged to the maximum. Moreover, the control method also can ensure safe and stable operation of the energy storage system.

Description

technical field [0001] The invention belongs to the field of power systems, and in particular relates to a control method for a battery energy storage system used for peak-shaving and valley-filling of distribution networks. Background technique [0002] With the development of social economy and the improvement of people's living standards, the load in the power system presents the characteristics that the peak-to-valley load difference increases year by year, and the maximum load utilization hours decrease year by year. This will cause the scale of power equipment in the links of generation, transmission, and distribution to increase with the increase of the annual maximum load, but the annual maximum load utilization hours of the equipment will decrease, reducing the economics of power equipment investment and causing social resources. Underutilized. Although measures such as time-of-use electricity pricing and demand-side management can be implemented to achieve peak sh...

Claims

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Application Information

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IPC IPC(8): H02J3/32
CPCY02E40/10
Inventor 李建林张浩修晓青惠东高志强王文新孟良
Owner STATE GRID CORP OF CHINA
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