| 引用本文: | 敖鑫,王淳,蔡恒,等.计及接地支路的直流潮流算法[J].电力系统保护与控制,2017,45(16):8-15.[点击复制] |
| AO Xin,WANG Chun,CAI Heng,et al.DC power flow algorithm considering grounding branches[J].Power System Protection and Control,2017,45(16):8-15[点击复制] |
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| 摘要: |
| 在考虑无功注入和线路电阻的基础上，计入接地支路的影响并仍保持了直流潮流方程的线性形式，提出了适合于计算输电系统无功功率的直流潮流算法。该算法利用完整的节点导纳矩阵形成相应的并联元件导纳项，在不改变直流潮流方程线性形式的情况下计入接地支路中并联元件的影响。通过修正相角的回代求出所有PQ节点的电压幅值，结合复功率潮流方程可同时求得系统的有功功率和无功功率。IEEE-118节点算例结果表明:与不考虑接地支路的直流潮流算法相比，所提出的算法在保持现有直流潮流算法的有功潮流计算精度的前提下，提升了电压幅值和无功潮流的计算精度，使直流潮流算法适用于输电系统无功功率的计算。 |
| 关键词: 输电系统 直流潮流 接地支路 电压幅值 无功功率 |
| DOI：10.7667/PSPC161315 |
| 投稿时间：2016-08-16修订日期：2016-10-25 |
| 基金项目:国家自然科学基金资助项目(51467012，51167012);江西省教育厅科技项目(GJJ14165) |
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| DC power flow algorithm considering grounding branches |
| AO Xin,WANG Chun,CAI Heng,HUANG Kecheng,WANG Huafeng,WANG Qingming,HUANG Dezhi |
| (Nanchang University, Nanchang 330031, China;State Grid Jiangxi Electric Power Company, Nanchang 330077, China) |
| Abstract: |
| On the basis of considering reactive power injections and line resistance, a novel DC power flow algorithm, which takes into account the influence of grounding branches without losing the linearity of DC power flow equations and is suitable to calculate reactive power flow in transmission system, is proposed. The shunt elements in grounding branches are included by utilizing the complete nodal admittance to form corresponding admittance item，and the linearity of DC power flow equations is retained. Nodal voltage amplitude of PQ node could be obtained by the back substitution of modified voltage phase angles. The active power flow and reactive power flow could be solved using the complex power flow equations. IEEE 118-bus test results indicate that compared with DC power flow method without the consideration of grounding branches, the proposed method retains the performance of current DC power flow algorithm in the calculation of active power flow while improving the accuracy of reactive power flow and nodal voltage amplitude, which makes DC power flow method be suitable for calculating reactive power flow in transmission system. This work is supported by National Natural Science Foundation of China (No. 51467012 and No. 51167012) and Scientific Item of Education Bureau of Jiangxi Province (No. GJJ14165). |
| Key words: transmission system DCpower flow grounding branch voltage amplitude reactive power |
