基于电热协调理论提升电网消纳间歇式能源发电能力的分析

Improving intermittent energy accommodation capability of power grid based on electro-thermal coordination theory

提出基于电热协调理论的电网消纳间歇式能源发电方法。建立电热协调的电网消纳模型,该模型结合间歇式能源发电功率及负荷预测技术,在超前调度中考虑输电元件电热耦合规律,以最大允许温度为输电元件载荷能力热限制,并协调伴随间歇式能源发电波动过程的输电元件载流与温度耦合的动态过程,使调度能够超前利用载流与温度变化的不同步性,缓解输电元件载荷能力依据电流判别的紧张局面,从而提升电网消纳间歇式能源发电的能力。算例分析结果验证了所提方法的有效性。

A method based on electro-thermal coordination theory is proposed to improve the intermittent energy accommodation capability of power grid. A power grid accommodation model with electro-thermal coordination is built,which,combined with the intermittent energy generated power and load forecasting technique ,considers the electro-thermal coupling law of transmission components in the advanced dispatch, takes the maximum permissible temperature as the thermal load-carrying limit of transmission components, and coordinates the current-temperature coupled dynamic process of transmission components during the fluctuating intermittent energy power generation. The asynchronization between current and temperature changes is used in advance to mitigate the current-dependent load-carrying capacity tension of transmission components and thus improve the intermittent energy accommodation capacity of power grid. Results of case analysis verify the effectiveness of the proposed method.