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Dual-time-scale control method of an energy storage system in a wind-storage combined power generation

A technology of wind-storage combined power generation and energy storage system, applied in wind power generation, electrical components, energy storage, etc., can solve problems such as insufficient abundance and depth

Inactive Publication Date: 2019-01-25
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
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Problems solved by technology

[0004] At present, the research on the control of energy storage systems in wind-storage combined power generation is not rich enough and in-depth. Targets such as output fluctuation and grid-side operating economy

Method used

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  • Dual-time-scale control method of an energy storage system in a wind-storage combined power generation

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Embodiment

[0093] The present invention takes the revised IEEE30 node system as an embodiment, and its topology is as follows Figure 4 As shown, a wind farm with a capacity of 120MW is added to node 3, and the energy storage system is configured according to 15% of the installed capacity of wind power. The calculation results of various indicators of the wind-storage combined power generation system are shown in Table 1. It can be seen that configuring the energy storage system in the wind farm can eliminate the load shedding demand during peak loads, reduce the amount of abandoned air, reduce the operating cost of thermal power units, and reduce the The reserve capacity deficit when the output is too large. Under the action of the dual-time scale control method, the output of the energy storage system and the aggregated power curves of the combined wind-storage power generation system are as follows: Figure 5 and Figure 6 shown. It can be seen from the figures and tables that the ...

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Abstract

The invention discloses a dual-time-scale control method of an energy storage system in a wind-storage combined power generation, which constructs a two-layer control frame, and in the outer layer control, a reference output of each period of the energy storage system on a large time scale is dispatched based on an optimization theory. In the inner layer control, the outer layer optimization result is the control constraint, which suppresses the high frequency fluctuation of the wind power output on the small time scale. Through the coordination between the internal and external control, the energy storage system can be used to stabilize the fluctuation of wind power output, and improve the grid operation economy and wind power absorbing capacity.

Description

technical field [0001] The invention relates to the field of new energy power generation, in particular to a dual-time-scale control method for an energy storage system in wind-storage combined power generation. Background technique [0002] In recent years, intermittent renewable energy represented by wind power has developed rapidly, and its installed capacity has continued to increase. However, the volatility and intermittency of renewable energy will increase the pressure on grid dispatching and control, reduce the ability of the grid to absorb renewable energy, cause problems such as power abandonment, and seriously restrict the economy and reliability of grid operation. The energy storage system can reduce the volatility and randomness of renewable energy power generation such as wind power to a certain extent, and stabilize the output fluctuation of renewable energy power generation. Therefore, how to control the energy storage system to improve the economy and safet...

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Application Information

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IPC IPC(8): H02J3/38H02J3/28
CPCH02J3/28H02J3/386Y02E10/76Y02E70/30
Inventor 杨冬周宁马琳琳张冰张鹏飞武诚李新麻常辉邢鲁华郑天茹陈博赵康马欢李山蒋哲李文博刘文学
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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