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| 基于阻抗补偿的三相四线制配电网前推回代潮流算法 | |
| 引用本文： | 高亚静,苗宏佳,吴文传,李飞.基于阻抗补偿的三相四线制配电网前推回代潮流算法[J].电力系统自动化,2015,39(7):47-51. |
| 作者姓名： | 高亚静 苗宏佳 吴文传 李飞 |
| 作者单位： | 1. 新能源电力系统国家重点实验室 华北电力大学,河北省保定市,071003 2. 新能源电力系统国家重点实验室 华北电力大学，河北省保定市 071003; 清华大学电机工程与应用电子技术系，北京市 100084; 电力系统及发电设备控制和仿真国家重点实验室，清华大学，北京市 100084 3. 清华大学电机工程与应用电子技术系，北京市 100084; 电力系统及发电设备控制和仿真国家重点实验室，清华大学，北京市 100084 4. 贵州电网公司,贵州省贵阳市,550002 |
| 基金项目： | 国家科技支撑计划资助项目(2013BAA01B01);黔科重大专项资助项目(〔2012〕6022) |
| 摘 要： | 在三相四线制配电网中,中性线重复接地对前推回代潮流算法存在收敛性问题。分析了中性线重复接地导致前推回代潮流算法难收敛的原因,提出一种基于阻抗补偿的三相四线制配电网前推回代潮流算法,改善了潮流计算的收敛性,并保证补偿前后的潮流结果不变。该方法通过在接地电阻和重复接地点之间补偿一对大小合适且取值相反的阻抗,减小了不动点迭代雅可比矩阵的谱半径,使之满足压缩映射的条件,从而保证潮流计算收敛。算例验证了所提方法的正确性。 |
| 关 键 词： | 配电网 潮流计算 前推回代算法 补偿阻抗 |
| 收稿时间： | 2014/8/11 0:00:00 |
| 修稿时间： | 3/7/2015 12:00:00 AM |
An Impedance Compensation Based Forward/Backward Sweep Power Flow Algorithm for Three-phase Four-wire Distribution Networks |
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| GAO Yajing,MIAO Hongji,WU Wenchuan and LI Fei.An Impedance Compensation Based Forward/Backward Sweep Power Flow Algorithm for Three-phase Four-wire Distribution Networks[J].Automation of Electric Power Systems,2015,39(7):47-51. | |
| Authors: | GAO Yajing MIAO Hongji WU Wenchuan and LI Fei |
| Affiliation: | State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources (North China Electric Power University), Baoding 071003, China,State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources (North China Electric Power University), Baoding 071003, China;Department of Electrical Engineering, Tsinghua University, Beijing 100084, China; State Key Laboratory of Control and Simulation of Power System and Generation Equipments, Tsinghua University, Beijing 100084, China,China;Department of Electrical Engineering, Tsinghua University, Beijing 100084, China; State Key Laboratory of Control and Simulation of Power System and Generation Equipments, Tsinghua University, Beijing 100084, China and Guizhou Power Grid Corporation, Guiyang 550002, China |
| Abstract: | Convergence problems in forward/backward sweep power flow algorithms may arise because of neutral grounding resistance in multi-grounded three-phase four-wire distribution networks. The causes of the convergence problem are analyzed and an impedance compensation method of addressing this problem is described. The proposed method is able to guarantee the convergence and keep the power flow solution unchanged. By adding two serial impedances with opposite value between the grounding resistance and the neutral point, the spectral radius of the Jacobian matrix in fixed-point iteration is reduced to below 1, which satisfies the requirement of contraction mapping. Finally, the results of numerical tests have demonstrated the correctness of the method and its practical values. This work is supported by National Key Technologies R&D Program of China (No. 2013BAA01B01) and Important Guizhou Science & Technology Specific Projects (No. (2012)6022). |
| Keywords: | distribution networks power flow calculation forward/backward sweep algorithm compensation impedances |
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