交直流混合外送模式下流域水风光电源基地短期优化调度方法

苏华英; 刘珈言; 陈龙; 邓佳莉; 张俊涛; 程春田

doi:10.3969/j.issn.1001-9235.2026.06.012

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交直流混合外送模式下流域水风光电源基地短期优化调度方法

综合 | 更新时间：2026-06-30

- 交直流混合外送模式下流域水风光电源基地短期优化调度方法
- Short-term Optimal Scheduling Method for Watershed Hydro-Solar-Wind Power Bases under AC-DC Hybrid Transmission Mode
- 人民珠江 2026年47卷第6期页码：133-144
- 作者机构：
  
  1.贵州电网有限责任公司电力调度控制中心，贵州贵阳 550002
  2.大连理工大学水电与水信息研究所，辽宁大连 116024
- 作者简介：
  
  苏华英（1981—），女，硕士，正高级工程师，主要从事水电调度运行研究等工作。
  刘珈言（2001—），女，硕士研究生，主要从事水风光多能互补优化调度运行等方面的研究。
- 基金信息：
  
  贵州电网有限责任公司电力调度控制中心高比例新能源电网水电灵活性量化动态评估及智慧调控技术研究项目(GZKJXM20220086);国家自然科学基金青年科学基金项目(52409010)
- DOI：10.3969/j.issn.1001-9235.2026.06.012
  中图分类号： TV7
- 收稿：2025-11-06，
  
  修回：2025-12-26，
  
  录用：2026-01-14，
  
  网络首发：2026-02-12，
  
  纸质出版：2026-06-25
- 稿件说明：
移动端阅览
苏华英，刘珈言，陈龙，等.交直流混合外送模式下流域水风光电源基地短期优化调度方法［J］.人民珠江，2026，47（6）：133-144.

SU Huaying,LIU Jiayan,CHEN Long,et al.Short-term Optimal Scheduling Method for Watershed Hydro-Solar-Wind Power Bases under AC-DC Hybrid Transmission Mode[J].PEARL RIVER,2026,47(06):133-144.
苏华英，刘珈言，陈龙，等.交直流混合外送模式下流域水风光电源基地短期优化调度方法［J］.人民珠江，2026，47（6）：133-144. DOI： 10.3969/j.issn.1001-9235.2026.06.012.

SU Huaying,LIU Jiayan,CHEN Long,et al.Short-term Optimal Scheduling Method for Watershed Hydro-Solar-Wind Power Bases under AC-DC Hybrid Transmission Mode[J].PEARL RIVER,2026,47(06):133-144. DOI： 10.3969/j.issn.1001-9235.2026.06.012.

摘要

为解决多受端交直流混合外送场景下水风光基地的调度难题，针对新能源出力不确定性、交直流受端电力分配矛盾、上下游调度协调复杂等核心问题，提出面向交直流混联外送的流域水风光电源基地短期优化调度方法。时间上，按照实际调度需求，考虑到汛枯期来水条件、系统运行存在差异，设置不同的目标函数；空间上，考虑梯级水力联系，上下游协同运行约束；此外，模型综合考虑水电分电比例、直流阶梯化功率、水电备用等约束条件，确保电力计划曲线满足实际应用需求。西南某千万千瓦级流域基地实例应用表明：该电力分配方法可精准匹配多受端需求，将电力在交直流受端之间进行分配，枯期使交流受端电网剩余负荷峰谷差降低36%，汛期减少下游电站弃电5.56亿kW·h，为多受端水风光一体化基地的高效调度与工程实践提供理论支撑。

Abstract

To address the increasingly prominent scheduling challenges of large-scale watershed Hydro-Solar-Wind (HSW) generation bases under multi-terminal AC-DC hybrid transmission scenarios

this study proposes a short-term optimal scheduling method for watershed HSW generation bases oriented toward AC-DC hybrid delivery. This method specifically addresses three core technical bottlenecks in practical operation: the strong uncertainty of wind-solar renewable energy output induced by meteorological factor fluctuations

the intense contradiction in power distribution between AC and DC receiving terminals arising from differences in load characteristics and grid operation constraints

and the complexities in upstream-downstream scheduling coordination caused by the intricate cascade hydrological and hydraulic connections of watershed power stations. With the rapid advancement of renewable energy grid integration and the continuous expansion of cross-regional power transmission projects

the safe and efficient operation of multi-terminal AC-DC hybrid transmission systems has become a key bottleneck restricting the accommodation of large-scale HSW generation bases

rendering the development of targeted optimal scheduling methods an urgent practical need. Temporally

to adapt to significant hydrological and operational discrepancies between flood and dry seasons

the proposed method formulates differentiated objective functions in line with actual scheduling requirements. During the dry season

the core objective is to minimize the sum of squares of residual load in the AC receiving terminal grid

thereby enhancing the stability of the receiving-end power system; during the flood season

the core goal shifts to maximizing the total generated power for better economic benefits of the HSW base. Spatially

the method fully accounts for the strong cascade hydraulic connections between upstream and downstream hydropower stations

incorporating upstream-downstream coordinated operation constraints into the scheduling model. Distinct from the traditional independent scheduling mode where each power station formulates scheduling plans separately

this approach ensures that the scheduling decisions of each power station are mutually compatible and globally optimal

giving full play to the operational benefits of individual power stations through integrated scheduling. In addition

to enhance the practical applicability and reliability of the scheduling model

this study comprehensively incorporates a series of key operational constraints. These include the fixed hydropower allocation ratio between AC and DC transmission channels specified in grid planning

the stepped power constraints of DC systems to guarantee the stable operation of converter stations

and the hydropower reserve constraints designed to cope with sudden fluctuations in renewable energy output and unexpected load variations. These constraints ensure the direct applicability of the optimized generation scheduling curve in engineering practice. An application study was performed on a 10-million-kilowatt-level watershed HSW generation base in Southwest China

which serves as a typical representative of multi-terminal AC-DC hybrid transmission projects. The application results demonstrate that the proposed power distribution method can accurately match the demand characteristics of multiple receiving terminals

flexibly achieve the optimal distribution of power from the HSW generation base between AC and DC receiving terminals

and satisfy the power supply and peak-shaving requirements of multiple receiving terminals. Specifically

during the dry season

the peak-valley difference of residual load in the AC receiving terminal grid is reduced by 36% compared with the original load

effectively mitigating the peak-shaving pressure of the receiving-end grid; during the flood season

the power curtailment of downstream power stations is reduced by 556 million kW·h

significantly improving the utilization efficiency of water resources and renewable energy. Meanwhile

a sensitivity analysis of the power allocation ratio and transmission channels was conducted. These results fully validate the effectiveness and superiority of the proposed method

which can provide important theoretical support and technical references for the efficient scheduling and engineering practice of multi-terminal integrated HSW generation bases under AC-DC hybrid transmission scenarios.

关键词

Keywords

references

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