基于PMU量测的配电网模型等值与就地电压控制
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摘要
电压控制是提高电压质量,保障电网安全、优质和经济运行的重要措施之一,而就地电压控制作为一种重要手段,能够实现无功功率分层分区就地平衡,可以有效改善局部电压质量,将电压维持在正常运行范围以内。本文提出一种基于同步相量量测的戴维南等值与就地电压控制方法,首先利用量测数据并考虑量测中噪声和系统内部运行状态变化的影响,通过卡尔曼滤波估计得到戴维南等值模型参数;然后根据等值后的网络计算等值节点的电压-功率灵敏度,进一步利用电压-功率灵敏度提出了就地电压无功控制策略。将本算法用于IEEE 33节点配电系统,验证了所提出算法的正确性和有效性。
Voltage control is one of the important measures to improve the voltage quality and ensure the safe,high quality,and economic operation of power grid.Moreover,local voltage control is an important method to achieve the local balance of reactive power in different hierarchies and regions,which can effectively improve the local voltage quality by keeping voltage within the normal operation range. In this paper,a Thévenin equivalent and local voltage control method based on synchronized phasor measurements is presented.First,the parameters of Thévenin equivalent model are estimated using Kalman filter,during which the measurement data are used and both the noise in measurements and changes in the system's operation status are considered. Then,the voltage-to-power sensitivities at equivalent nodes are calculated according to the network after the construction of the Thévenin equivalent model,with which a local voltage reactive power control strategy is proposed.The proposed method is applied to an IEEE 33-node distribution system,and results verify the correctness and effectiveness of this method.
Voltage control is one of the important measures to improve the voltage quality and ensure the safe,high quality,and economic operation of power grid.Moreover,local voltage control is an important method to achieve the local balance of reactive power in different hierarchies and regions,which can effectively improve the local voltage quality by keeping voltage within the normal operation range. In this paper,a Thévenin equivalent and local voltage control method based on synchronized phasor measurements is presented.First,the parameters of Thévenin equivalent model are estimated using Kalman filter,during which the measurement data are used and both the noise in measurements and changes in the system's operation status are considered. Then,the voltage-to-power sensitivities at equivalent nodes are calculated according to the network after the construction of the Thévenin equivalent model,with which a local voltage reactive power control strategy is proposed.The proposed method is applied to an IEEE 33-node distribution system,and results verify the correctness and effectiveness of this method.
引文
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[4]邱军(Qiu Jun).电力系统无功电压就地控制研究(Re?search on Reactive Power and Voltage Local Control of Power System)[D].武汉:华中科技大学电气与电子工程学院(Wuhan:College of Electrical&Electronic Engi?neering,Huazhong University of Science and Technolo?gy),2004.
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[7]张忠,王建学(Zhang Zhong,Wang Jianxue).采用模型预测控制的微电网有功无功联合实时调度方法(An ac?tive and reactive power joint real-time dispatch approach for microgrid using model predictive control)[J].中国电机工程学报(Proceedings of the CSEE),2016,36(24):6743-6750.
[8] Chen Y C,Dominguez-Garcia A D,Sauer P W. Measure?ment-based estimation of linear sensitivity distribution fac?tors and applications[J]. IEEE Trans on Power Systems,2014,29(3):1372-1382.
[9] Li Peng,Su Hongzhi,Wang Chengshan,et al. PMU-based estimation of voltage-to-power sensitivity for distribution networks considering the sparsity of Jacobian matrix[J].IEEE Access,2018,6:31307-31316.
[10]项添春,戚艳,董逸超,等(Xiang Tianchun,Qi Yan,Dong Yichao,et al).提高配电网供电可靠性和状态可观性的终端优化配置方法(Optimal configuration meth?od for terminals considering the reliability and observabili?ty of distribution network)[J].电力系统及其自动化学报(Proceedings of the CSU-EPSA),2017,29(6):107-112.
[11] Zhu Hao,Liu Hao Jan. Fast local voltage control under limited reactive power:optimality and stability analysis[J].IEEE Trans on Power Systems,2016,31(5):3794-3803.
[12] Jahangiri P,Aliprantis D. Distributed Volt/VAr control by PV inverters[J]. IEEE Trans on Power Systems,2013,28(3):3429-3439.
[13] Zhao Jinli,Li Yuwei,Li Peng,et al. Local voltage control strategy of active distribution network with PV reactive power optimization[C]//IEEE Power and Energy Society General Meeting. Chicago,USA,2017.
[14] Zhao Junbo,Wang Zhaoyu,Chen Chen,et al. Robust volt?age instability predictor[J]. IEEE Trans on Power Sys?tems,2017,32(2):1578-1579.
[15] Burchett S M,Douglas D,Ghiocel S G,et al. An optimal Thevenin equivalent estimation method and its applica?tion to the voltage stability analysis of a wind hub[J].IEEE Trans on Power Systems,2018,33(4):3644-3652.
[16]颜伟,文一宇,余娟,等(Yan Wei,Wen Yiyu,Yu Juan,et al).基于戴维南等值的静态电压稳定广域切负荷控制策略(A wide-area load shedding strategy based on Theve?nin equivalence and considering static voltage stability)[J].电网技术(Power System Technology),2011,35(8):88-92.
[2] Phadke A G,Thorp J S. Synchronized Phasor Measure?ments and Their Applications[M]. New York:Springer,2008.
[3] von Meier A V,Culler D,Mceachern A,et al. Micro-syn?chrophasors for distribution systems[C]//IEEE Innovative Smart Grid Technologies Conference. USA,2014.
[4]邱军(Qiu Jun).电力系统无功电压就地控制研究(Re?search on Reactive Power and Voltage Local Control of Power System)[D].武汉:华中科技大学电气与电子工程学院(Wuhan:College of Electrical&Electronic Engi?neering,Huazhong University of Science and Technolo?gy),2004.
[5] Kekatos V,Zhang L,Giannakis G,et al. Voltage regula?tion algorithms for multiphase power distribution grids[J].IEEE Trans on Power Systems,2016,31(5):3913-3923.
[6] Dragosavac J,Janda Z,Milanovic J V. Coordinated reac?tive power-voltage controller for multimachine power plant[J]. IEEE Trans on Power Systems,2012,27(3):1540-1549.
[7]张忠,王建学(Zhang Zhong,Wang Jianxue).采用模型预测控制的微电网有功无功联合实时调度方法(An ac?tive and reactive power joint real-time dispatch approach for microgrid using model predictive control)[J].中国电机工程学报(Proceedings of the CSEE),2016,36(24):6743-6750.
[8] Chen Y C,Dominguez-Garcia A D,Sauer P W. Measure?ment-based estimation of linear sensitivity distribution fac?tors and applications[J]. IEEE Trans on Power Systems,2014,29(3):1372-1382.
[9] Li Peng,Su Hongzhi,Wang Chengshan,et al. PMU-based estimation of voltage-to-power sensitivity for distribution networks considering the sparsity of Jacobian matrix[J].IEEE Access,2018,6:31307-31316.
[10]项添春,戚艳,董逸超,等(Xiang Tianchun,Qi Yan,Dong Yichao,et al).提高配电网供电可靠性和状态可观性的终端优化配置方法(Optimal configuration meth?od for terminals considering the reliability and observabili?ty of distribution network)[J].电力系统及其自动化学报(Proceedings of the CSU-EPSA),2017,29(6):107-112.
[11] Zhu Hao,Liu Hao Jan. Fast local voltage control under limited reactive power:optimality and stability analysis[J].IEEE Trans on Power Systems,2016,31(5):3794-3803.
[12] Jahangiri P,Aliprantis D. Distributed Volt/VAr control by PV inverters[J]. IEEE Trans on Power Systems,2013,28(3):3429-3439.
[13] Zhao Jinli,Li Yuwei,Li Peng,et al. Local voltage control strategy of active distribution network with PV reactive power optimization[C]//IEEE Power and Energy Society General Meeting. Chicago,USA,2017.
[14] Zhao Junbo,Wang Zhaoyu,Chen Chen,et al. Robust volt?age instability predictor[J]. IEEE Trans on Power Sys?tems,2017,32(2):1578-1579.
[15] Burchett S M,Douglas D,Ghiocel S G,et al. An optimal Thevenin equivalent estimation method and its applica?tion to the voltage stability analysis of a wind hub[J].IEEE Trans on Power Systems,2018,33(4):3644-3652.
[16]颜伟,文一宇,余娟,等(Yan Wei,Wen Yiyu,Yu Juan,et al).基于戴维南等值的静态电压稳定广域切负荷控制策略(A wide-area load shedding strategy based on Theve?nin equivalence and considering static voltage stability)[J].电网技术(Power System Technology),2011,35(8):88-92.