| 引用本文: | 杨喆麟,汪可友,李国杰.考虑风电不确定性的VSC-MTDC互联系统
两阶段交直流最优潮流[J].电力系统保护与控制,2020,48(14):25-34.[点击复制] |
| YANG Zhelin,WANG Keyou,LI Guojie.Two-stage AC/DC optimal power flow with VSC-MTDC considering uncertainty of wind power[J].Power System Protection and Control,2020,48(14):25-34[点击复制] |
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| 摘要: |
| 考虑不确定性风电通过多端柔性直流(VSC-MTDC)并网对交流系统运行的影响，提出了计及风电不确定性的VSC-MTDC互联系统的两阶段交直流最优潮流模型。围绕多端柔直参与实时调度的优化展开，基于“多级协调、逐级细化”的调度思路，在日内滚动阶段根据风电短期预测数据优化发电机的运行成本。在实时调度阶段根据风电超短期预测数据不断调整优化VSC换流站的控制指令和缓冲机组出力，及时修正风电短期预测误差对交流系统网损与电压水平带来的影响。将所提出模型应用于IEEE30和IEEE118节点算例中，验证了所提模型的有效性和可行性。 |
| 关键词: 多端柔性直流 风电并网 预测误差 两阶段优化 交直流系统 最优潮流 |
| DOI：10.19783/j.cnki.pspc.191011 |
| 投稿时间：2019-08-22修订日期：2019-07-13 |
| 基金项目:国家自然科学面上基金项目资助(51877133，51477098) |
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| Two-stage AC/DC optimal power flow with VSC-MTDC considering uncertainty of wind power |
| YANG Zhelin,WANG Keyou,LI Guojie |
| (School of Electric Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China) |
| Abstract: |
| Considering the impact of uncertain wind power integrated through a multi-terminal flexible direct current (VSC-MTDC) transmission system on the operation of an AC system, a two-stage AC/DC optimal power flow model with VSC-MTDC considering wind power uncertainty is proposed. This paper focuses on the optimization of VSC-MTDC in real-time scheduling, based on the dispatching idea of “multi-level coordination and step-by-step refinement”. During intraday rolling dispatching, the model optimizes the generator’s operation cost according to the short-term forecast data of wind power. During real-time dispatching, it continuously adjusts and optimizes the control instructions of the VSC converter station and the output of the buffer unit based on the ultra-short-term forecast data of wind power, and corrects the impact of short-term forecast errors of wind power on AC system network losses and voltage levels immediately. The proposed model is applied to the IEEE 30-node and IEEE 118-node example, and the validity and feasibility of the proposed model are verified. |
| Key words: VSC-MTDC wind power integration prediction error two-stage optimization AC/DC power system optimal power flow (OPF) |
