A two-port black-box external equivalent method using improved branch outage simulation

A two-port black-box external equivalent method using improved branch outage simulation
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使用改进的支路断电模拟的二端口黑盒外部等效方法

DOI:
10.1016/j.ijepes.2019.105437
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发表时间:
2020-02
影响因子:
5.2
通讯作者:
Tang Junjie
Tang Junjie
中科院分区:
工程技术2区
文献类型:
--
作者:
Yan Wei;Huang Dezhi;Wang Qian;Zhao Ruifeng;Zhang Chao;Tang Junjie

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由于技术和工业对其专有信息的保密性质,互联电网的子系统之间的实时数据共享不是一个可行的选择。为了在外部网络信息不可用或不考虑外部网络信息的情况下准确估计外部等值参数,提出了一种基于改进的基于直流潮流(BOSDC)的支路停运模拟方法的二端口黑箱外部等值方法,以替代现有的基于非拓扑学的静态等值方法,假设支路停运前后外部网络的状态几乎保持不变。此外,BOSDC的使用提高了等值参数的精度和静态安全分析的性能,特别是保留了表示为网络电纳增量与电压相角增量的乘积的二次项。该方法的参数估计方程是线性的,避免了设置初值和收敛准则的潜在问题。另外,支路停运前后的显著潮流变化可以有效地适应测量误差的干扰。对改进的IEEE 39节点系统和实际粤港电网的仿真结果验证了该方法的有效性。
Due to the guarded nature of technology and industry with respect to their proprietary information, real-time data sharing among subsystems of an interconnected power grid is not a viable option. To estimate external equivalent parameters accurately when the external network information is unavailable or not considered, a two-port black-box external equivalent method, using an improved branch outage simulation based on direct current (DC) power flow (BOSDC) approach, is proposed as an alternative to some existing non-topology based, static equivalent techniques with an assumption lies in that the state of the external network remains almost unchanged before and after the branch outage. Moreover, use of BOSDC improves the accuracy of equivalent parameters and the performance of static security analysis in particular by retaining the quadratic term, which is represented as the product between network susceptance increment and the voltage phase angle increment. The linearity of the parameter estimation equation in the proposed method gets rid of potential issues with setting initial values and convergence criteria. Additionally, the significant power flow change before and after the branch outage can effectively adapt the interference of measurement errors. Simulation results on the modified IEEE 39-bus system and the practical Guangdong-Hong Kong power system verify the effectiveness of the proposed method.
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