| 引用本文: | 郑 浩,赵晋泉,杨乘胜,陈 刚.节点约束统一的互补潮流模型及其应用[J].电力自动化设备,2016,36(2): |
| ZHENG Hao,ZHAO Jinquan,YANG Chengsheng,CHEN Gang.Complementary power flow model with unified bus constraints and its application[J].Electric Power Automation Equipment,2016,36(2): |
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| 摘要: |
| 提出一种节点约束统一的互补潮流模型。区别于常规启发式判断校正结构，牛顿迭代过程中自适应地辨析压控节点无功越限并渐进校正，避免由于采用错误的PV-PQ转换逻辑导致潮流计算失败或收敛于错误解。通过归一化非线性互补逼近函数描述无功电压约束特性，保持潮流计算雅可比矩阵整体结构，较好地解决互补潮流模型可微性和复杂性的问题，同时提供潮流节点类型识别性发散的一种数值化表现形式。在此基础上构建互补约束连续潮流，采用通用型临界点数值识别方法有效辨别临界点分岔类型和关键约束。通过多个测试算例验证了所提模型与方法的有效性。 |
| 关键词: 节点类型转换 互补约束 潮流模型 连续潮流 电压稳定 模型 电力系统 稳定性 |
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| 基金项目:国家自然科学基金资助项目（51077042）；高等学校博士学科点专项科研基金资助项目（20120094110008）；清华大学“电力系统及发电设备控制与仿真”国家重点实验室开放课题（SKLD11KZ02） |
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| Complementary power flow model with unified bus constraints and its application |
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ZHENG Hao1,2, ZHAO Jinquan1,2, YANG Chengsheng2,3, CHEN Gang1,2
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1.Research Center for Renewable Energy Generation Engineering，Ministry of Education，Hohai University，Nanjing 210098，China;2.College of Energy and Electrical Engineering，Hohai University，Nanjing 210098，China;3.Guodian Nanjing Automation Co.，Ltd.，Nanjing 211100，China
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| Abstract: |
| A complementary power flow model with unified bus constraints is proposed. Different from the conventional structure of heuristic judgment and correction，the reactive-power limit-violation of voltage-controlled node is automatically identified and progressively corrected during the Newton iteration to avoid the failure or incorrect convergence of power flow calculation caused by the wrong PV-PQ switching logic. The characteristics of reactive-power and voltage constraints are described by the normalized nonlinear complementary approximation function to maintain the overall structure of power flow Jacobian matrix for better dealing with the differentiability and complexity of complementary power flow model. A numerical form for representing the divergence of power-flow node-type identification is provided. The continuous power flow with complementary constraints is constructed and a general numerical method of critical point identification is applied to effectively detect its bifurcation type and key constraints. The effectiveness of the proposed model and method is verified by multiple test cases. |
| Key words: bus-type switching complementary constraint power flow model continuous power flow voltage stability models electric power systems stability |
