引用本文: | 聂永辉,李天云,刘凤兰,等.基于非线性内点理论的交直流系统无功优化新模型[J].电力系统保护与控制,2014,42(10):35-40.[点击复制] |
NIE Yong-hui,LI Tian-yun,LIU Feng-lan,et al.A new AC-DC reactive optimal power flow model based on nonlinear interior point method[J].Power System Protection and Control,2014,42(10):35-40[点击复制] |
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摘要: |
在交流侧有载调压变压器(Load tap changing transformer, LTC)支路中引进虚拟节点,并通过虚拟节点的电压来表示有载可调变压器支路功率方程;对于直流系统,在换流变压器的理想变压器和换流阻抗之间引进一个虚拟节点,虚拟节点电压幅值等一些变量被用来表示换流器支路方程;耦合方程把不同坐标系下的方程耦合到一起,由此建立了交直流混合系统无功优化问题的二阶新模型。预测-校正原对偶内点法被用来实现这个无功优化问题,该模型的海森矩阵在优化过程中是恒常矩阵,只需要计算一次,这样缩短了内点法的计算总 |
关键词: 交直流系统 有载可调变压器 换流器 无功优化 |
DOI:10.7667/j.issn.1674-3415.2014.10.006 |
投稿时间:2013-03-16修订日期:2013-05-09 |
基金项目: |
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A new AC-DC reactive optimal power flow model based on nonlinear interior point method |
NIE Yong-hui,LI Tian-yun,LIU Feng-lan,DU Zheng-chun |
(Academic Administration Office, Northeast Dianli University, Jilin 132012, China; School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China;College of Electrical Engineering, Northeast Dianli University, Jilin 132012, China;Jilin Shiyan Middle School, Jilin 132010, China) |
Abstract: |
For the AC system, the artificial node voltage is used to express the LTC branch power equations. For the DC system, an artificial node is introduced to locate between the ideal transformer and commuting impedance. Some variables such as artificial node voltage amplitude corresponding to the converter branch are included to express the converter equation. The coupling equations integrate the quadratic AC and DC equations from the different coordinates into a united quadratic AC-DC ORPF model. The predictor-corrector primal-dual interior point method (PCPDIPM) is used to implement the optimization. The Hessian matrices in this model are constant and require to be computed only once in the optimal process, which speed up the calculation greatly. The simulation results show that the proposed method achieves a good convergence property than the conventional one. |
Key words: AC-DC power system load tap changing transformer converter reactive optimization |