Abstract
The rapidly increasing penetration of wind power into sending-side systems makes the wind power curtailment problem more severe. Enhancing the total transfer capability (TTC) of the transmission channel allows more wind power to be delivered to the load center; therefore, the curtailed wind power can be reduced. In this paper, a new method is proposed to enhance TTC, which works by optimizing the day-ahead thermal generation schedules. First, the impact of thermal generation plant/unit commitment on TTC is analyzed. Based on this, the day-ahead thermal generation scheduling rules to enhance TTC are proposed herein, and the corresponding optimization models are established and solved. Then, the optimal day-ahead thermal generation scheduling method to enhance TTC is formed. The proposed method was validated on the large-scale wind power base sending-side system in Gansu Province in China; the results indicate that the proposed method can significantly enhance TTC, and therefore, reduce the curtailed wind power.
Highlights
Large-scale wind power bases are mostly located in the areas with rich wind energy and far from the load center
This paper presents a new method with which to enhance total transfer capability (TTC) based on the existing grid structure, which is by optimizing the day-ahead thermal generation schedules, and it can help reduce curtailed wind power for the sending-side system with large-scale wind power integration
Rule 3: According to the above rules, optimize the day-ahead thermal generation schedules to enhance TTC, and increase wind power output based on the enhanced TTC to reduce curtailed wind power
Summary
Large-scale wind power bases are mostly located in the areas with rich wind energy and far from the load center. This paper presents a new method with which to enhance TTC based on the existing grid structure, which is by optimizing the day-ahead thermal generation schedules, and it can help reduce curtailed wind power for the sending-side system with large-scale wind power integration. With the enhanced TTC, more wind power is allowed to be delivered through the transmission channel to the load center; the curtailed wind power is reduced. Impact on XΣ and TJ , and on TTC, and the detailed analysis is as follows
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