计及换流器损耗的风电经柔直并网系统的随机最优潮流模型

doi:10.11930/j.issn.1004-9649.201808166

中国电力 ›› 2020, Vol. 53 ›› Issue (5): 77-88.DOI: 10.11930/j.issn.1004-9649.201808166

计及换流器损耗的风电经柔直并网系统的随机最优潮流模型

都嘉慧¹, 王长江¹, 李凌², 杨晨光³

1. 东北电力大学电气工程学院，吉林吉林 132012;
2. 国网物资有限公司，北京 100120;
3. 国网白山供电公司，吉林白山 134300

收稿日期:2018-08-30 修回日期:2019-02-21 发布日期:2020-05-05
作者简介:都嘉慧(1993-),女,硕士,从事电力系统柔性直流输电研究,E-mail:342532639@qq.com;王长江(1989-),男,通信作者,博士研究生,从事电力系统稳定性分析与控制研究,E-mail:cjwangneepu@163.com;李凌(1982-),男,硕士,高级工程师,从事电力设备产品质量监督工作,E-mail:liling@sgm.sgcc.com.cn
基金资助:
国家电网有限公司科技项目(千万千瓦级分层接入直流送受端系统动态行为机理和协调控制措施研究，SGTYHT17-JS-199)

Stochastic Optimal Power Flow of Wind Turbine through Flexible Grid Connected System Considering Converter Loss

DU Jiahui¹, WANG Changjiang¹, LI Ling², YANG Chenguang³

1. College of Electrical Engineering, Northeast Electric Power University, Jilin 132000, China;
2. State Grid Materials Co., Ltd., Beijing 100120, China;
3. State Grid Baishan Power Supply Company, Baishan 134300, China

Received:2018-08-30 Revised:2019-02-21 Published:2020-05-05
Supported by:
This work is supported by Science and Technology Project of State Grid Corporation of China (No.SGTYHT17-JS-199)

摘要/Abstract

摘要： 由于风电的随机性和不确定性，使得风电大规模并网后电力系统的安全稳定运行难度增大，因此有必要对风电经柔直并网系统的随机最优潮流展开深入研究。提出一种计及换流器损耗和风电随机性的风电经柔性直流并网的随机最优潮流模型。首先，建立风电功率数学模型和计及换流器损耗的VSC-HVDC数学模型，考虑风电并网时换流站的不同控制方式；其次，利用场景法模拟风电功率的不确定性，并通过Kantorovich距离的场景削减技术提高计算效率，构建风电经柔性直流并网系统随机最优潮流模型，采用内点法对优化模型进行求解，利用统计学方法计算目标函数的数字特征；最后，以修改的WECC 2机5节点系统和IEEE-118节点系统为例进行仿真分析，验证所提出优化模型的合理性和有效性。

关键词: 换流器损耗, 风力发电, 场景法, 场景削减, 最优潮流

Abstract: Because of the randomness and volatility of wind power, large-scale grid-connection will bring great challenges to the safe and stable operation of power systems. Therefore, it is necessary to deeply study the stochastic optimal power flow of wind power through (VSC-HVDC) grid-connection system. In this paper, a stochastic optimal power flow model for wind power through flexible DC grid-connected system is presented, which takes into account converter loss and wind power randomness. Firstly, the mathematical model of wind power and the VSC-HVDC mathematical model considering converter loss are established, and different control methods of the converter stations are analyzed when wind power is grid-connected. Secondly, scenario method is used to simulate the uncertainty of wind power, and Kantorovich distance based scenario cutting technology is used to improve the calculation efficiency. Thirdly, the stochastic optimal power flow model of wind power through the flexible DC grid-connected system is constructed, and the model is solved by the interior point method, and the numerical characteristics of output variables are obtained by using the statistical method. Finally, taking the modified WECC 2 machine 5 node and IEEE-118 node system as examples, the calculation example is analyzed to verify the rationality and validity of the proposed optimal model.

Key words: converter loss, wind power generation, scenario method, scenario cutting, optimal power flow

都嘉慧, 王长江, 李凌, 杨晨光. 计及换流器损耗的风电经柔直并网系统的随机最优潮流模型[J]. 中国电力, 2020, 53(5): 77-88.

DU Jiahui, WANG Changjiang, LI Ling, YANG Chenguang. Stochastic Optimal Power Flow of Wind Turbine through Flexible Grid Connected System Considering Converter Loss[J]. Electric Power, 2020, 53(5): 77-88.

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计及换流器损耗的风电经柔直并网系统的随机最优潮流模型

Stochastic Optimal Power Flow of Wind Turbine through Flexible Grid Connected System Considering Converter Loss

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计及换流器损耗的风电经柔直并网系统的随机最优潮流模型

Stochastic Optimal Power Flow of Wind Turbine through Flexible Grid Connected System Considering Converter Loss

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