基于分段电价的跨区风电消纳

大规模风电跨区输送越来越频繁,加大了受端区域电力系统的调节压力,严重影响了风电的消纳能力。针对这一问题,提出一种基于分段电价的风电消纳方法。该方法以电网公司购电总费用最小为目标,考虑火电和抽蓄各自参与风电消纳的边际成本效益,并通过对风电不同电量部分施行分段电价,使得电网公司、风电厂、火电厂和抽蓄电站等多个主体之间利益均衡,增加系统对风电的消纳,同时从理论上证明该方法与弃风惩罚方法原理上的等效性。仿真算例验证了该方法的有效性。仿真结果表明该方法能够显著减少弃风,在不降低电网企业利益的同时,提高火电和抽蓄电站参与风电消纳的积极性,增加风电企业的收益。

Wind Power Accommodation Based on Block Price

The more and more trans-provincial transmission of large-scale wind power challenges the power system at the receiving-end of the transmission line with peak-load regulation. And this has significantly affected the wind power accommodation. In this paper, a new method for wind power accommodation based on block prices was proposed minimizing the cost of power purchase paid by power system operators. The marginal cost benefits of the thermal unit and pumped-storage hydro (PSH) was considered and the block pricing mechanism of the wind power is investigated to help wind power accommodation. The profits made by different participants such as grid company, wind power enterprise, thermal unit and PSH are balanced through the proposed pricing mechanism and the wind power accommodation can be increased. It was proved theoretically in this paper that the proposed method is equivalent to wind curtailment penalty. Finally, simulation results demonstrate the effectiveness. Results show that this method could help to reduce the wind curtailment significantly so that the profit of wind power enterprise can be increased. The thermal unit and PSH will more actively participate in the system regulation and the profit of transmission system operator will not be affected.