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A method and device for load peak regulation and wind power fluctuation suppression in a wind storage power station grid

A technology of grid load and power station, applied in the field of wind-storage combined power generation, can solve problems such as lack of research

Active Publication Date: 2015-12-09
STATE GRID CORP OF CHINA +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, on the basis of considering the peak load shaving of the grid load by the wind storage power station, how to stabilize the fluctuation of wind power has not been studied at home and abroad.

Method used

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  • A method and device for load peak regulation and wind power fluctuation suppression in a wind storage power station grid
  • A method and device for load peak regulation and wind power fluctuation suppression in a wind storage power station grid
  • A method and device for load peak regulation and wind power fluctuation suppression in a wind storage power station grid

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Effect test

Embodiment 1

[0155] In this embodiment, the energy storage system is 20MW / MWh, and the capacity of the wind farm is 100MW. The power grid load forecast data and wind farm power forecast data and actual data on a certain day in winter are used for simulation verification. Wind power fluctuation suppression method. Among them, the time interval between wind power prediction and grid load prediction is 15 minutes, and the time interval between real-time wind power active power test is 1 minute.

[0156] image 3 Shown is the effect diagram of the wind-storage joint output optimized recently. It can be seen that compared with the wind power forecast output, the recently optimized wind-storage joint output is already close to the active demand of the grid load for the wind-storage power station; Figure 4 Optimize energy storage output for the corresponding days; Figure 5 is the corresponding energy storage system state of charge (StateofCharge, SOC) change curve.

[0157] Figure 6 for ri...

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Abstract

The invention provides a method and a device for wind power fluctuation restraining and power grid load peak shaving of a wind storage power station and is applied to the technical field of wind storage combined power generation. The method comprises the steps of calculating the active power needs of the power grid load on the wind storage power station; establishing the day-ahead optimizing model for the power grid load peak shaving; converting the day-ahead optimizing model into a quadratic programming problem and solving the day-ahead optimized energy storage system contribution data; calculating the day-ahead optimized wind storage combined combustion data; performing first-order lowpass filtering on the day-ahead optimized wind storage combined contribution data to obtain the wind storage combined reference output power; calculating the extra contribution data of an energy storage system; optimizing the extra contribution data of the energy storage system; calculating the total contribution data of the energy storage system. According to the method and the device for the wind power fluctuation restraining and the power grid load peak shaving of the wind storage power station, the randomness and non-scheduling property of wind power can be effectively improved, and the problems such as a series of difficulty caused by gradual increasing of valley-to-peak difference of the power grid load and the lower utilization rate of power equipment properties planned and built for meeting the power grid peak needs are improved.

Description

technical field [0001] The invention relates to the technical field of wind-storage combined power generation, in particular to a method and device for load peak regulation and wind power fluctuation suppression of a wind-storage power station power grid. Background technique [0002] In recent years, in order to cope with the energy crisis and alleviate the increasingly severe environmental pressure, the development and utilization of renewable energy power generation has become the focus of attention of countries all over the world. Wind power generation has become an important choice due to its many advantages such as non-polluting and permanent use of primary energy. However, wind power generation is random, intermittent, and unpredictable. When it is integrated into the existing power grid to a certain extent, this unstable factor may have a great impact on the local power grid, and even lead to large-scale vicious At the same time, with the improvement of people's livi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/28H02J3/24H02J3/46G06F19/00
CPCY02E10/763Y02E10/766Y02E70/30Y02E10/76
Inventor 陈豪石世前李娜李智张滢柳玉宗谨白恺刘辉张瑞芳
Owner STATE GRID CORP OF CHINA
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