为解决大规模风电接入电网场景下并网火电机组台数和系统有功备用容量减少的问题,该文提出一种计及双馈感应发电机（DFIG）向下调度能力的风火系统经济调度模型。首先,综合深度调峰火电机组运行成本、开机成本、寿命损耗和风电弃风成本等,建立风火系统经济调度模型。其次,考虑到高风速下转子侧变流器（RSC）容量制约DFIG有功下限,该文计及RSC容量约束,提出DFIG有功下限求解算法,进而提出计及DFIG有功下限约束的风火系统经济调度模型。最后,IEEE 30节点算例结果表明所提经济调度模型可降低火电运行成本和风电弃风量。
Abstract
To solve the problem of the insufficient units of the integrated thermal generators and the power reserve of the system under the large-scale wind power access grid scenario, an economic dispatch model for the wind/thermal system with the downward dispatch capability to the doubly-fed induction generators （DFIGs） is proposed in this paper. Firstly, by including the operation cost, start cost, life loss of the thermal units, and the curtailment cost of the wind power, an economic dispatch model for the wind/thermal system is established. Secondly, since the capacity of rotorside converter （RSC） restricts the lower active power limit of DFIG with high wind speed, an analytical solution to the lower active power limit of DFIG considering the constraint to the RSC’s capacity is proposed, then the economic dispatch model with the lower limit is proposed for the wind/thermal system. Finally, the IEEE-30 node arithmetic results show that the proposed economic dispatch model reduces the operation cost of thermal power and curtailment for wind power.
关键词
风力机 /
风力发电 /
发电调度 /
火力发电站 /
深度调峰 /
有功下限
Key words
wind turbines /
wind power /
power generation dispatch /
thermal generator /
deep peak regulation /
lower active power limit
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