This work presents a fuzzy based methodology for distribution system feeder reconfiguration considering DSTATCOM with an objective of minimizing real power loss and operating cost. Installation costs of DSTATCOM devic...This work presents a fuzzy based methodology for distribution system feeder reconfiguration considering DSTATCOM with an objective of minimizing real power loss and operating cost. Installation costs of DSTATCOM devices and the cost of system operation, namely, energy loss cost due to both reconfiguration and DSTATCOM placement, are combined to form the objective function to be minimized. The distribution system tie switches, DSTATCOM location and size have been optimally determined to obtain an appropriate operational condition. In the proposed approach, the fuzzy membership function of loss sensitivity is used for the selection of weak nodes in the power system for the placement of DSTATCOM and the optimal parameter settings of the DFACTS device along with optimal selection of tie switches in reconfiguration process are governed by genetic algorithm(GA). Simulation results on IEEE 33-bus and IEEE 69-bus test systems concluded that the combinatorial method using DSTATCOM and reconfiguration is preferable to reduce power losses to 34.44% for 33-bus system and to 45.43% for 69-bus system.展开更多
随着配电网复杂性日益增加以及对电能质量要求不断提高,谐波污染和网络损耗已成为影响新型电力系统稳定性和运行效率的关键因素。通过同步优化电容器和有源功率滤波器(active power filter,APF)的配置,实现谐波抑制与网络损耗最小化的...随着配电网复杂性日益增加以及对电能质量要求不断提高,谐波污染和网络损耗已成为影响新型电力系统稳定性和运行效率的关键因素。通过同步优化电容器和有源功率滤波器(active power filter,APF)的配置,实现谐波抑制与网络损耗最小化的双重目标。利用谐波功率流分析模型进行谐波评估,根据谐波穿透法进行频域建模。对失真配电网络中的电容器和APF的同步配置建模,利用粒子群优化(particle swarm optimization,PSO)算法解决电容器和APF同步配置的混合整数非线性规划问题。实验结果表明:适当配置电容器和APF能够显著改善网络的电压质量,所提的同步优化方法不仅在降低系统成本的同时,显著提高了新型电力系统配电网的电能质量和运行效率。展开更多
低压配电台区负荷投切不规范或表计错误建档等工程问题都将导致云端业务系统出现拓扑数据异常(topology data exception,TDE)。这类情况多发生在电压曲线高度近似的同电源点网络,通过现有方法难以监测。为此提出了一种基于线损贡献度的...低压配电台区负荷投切不规范或表计错误建档等工程问题都将导致云端业务系统出现拓扑数据异常(topology data exception,TDE)。这类情况多发生在电压曲线高度近似的同电源点网络,通过现有方法难以监测。为此提出了一种基于线损贡献度的同源低压配电台区拓扑数据治理方法。首先根据线损方程得到台区下终端用户的回归系数和线损贡献度指标,并将指标突破阈值的TDE逐轮撤出台区。接着针对多个异常拓扑功率堆叠使线损波动特征大量丢失的问题,提出回归系数强制趋向策略,通过构建贝叶斯回归模型并融入具有双峰特性的边界趋向鼓励机制进一步检出潜在的TDE。最后提出基于电压相关性和线损平衡的阶梯式归真模型,先通过相关性分析逐级定位TDE隶属的10kV首端大馈线和0.4kV低压台区集,再利用线损贡献度规则溯源其准确的户变关系,实现拓扑数据闭环治理。所提方法已部署至华东某电力公司数据中台,并用八百余个实际台区数据验证校核,识别准确率为97.05%,具备较好的鲁棒性与泛用性。展开更多
基金supported by Borujerd Branch,Islamic Azad University Iran
文摘This work presents a fuzzy based methodology for distribution system feeder reconfiguration considering DSTATCOM with an objective of minimizing real power loss and operating cost. Installation costs of DSTATCOM devices and the cost of system operation, namely, energy loss cost due to both reconfiguration and DSTATCOM placement, are combined to form the objective function to be minimized. The distribution system tie switches, DSTATCOM location and size have been optimally determined to obtain an appropriate operational condition. In the proposed approach, the fuzzy membership function of loss sensitivity is used for the selection of weak nodes in the power system for the placement of DSTATCOM and the optimal parameter settings of the DFACTS device along with optimal selection of tie switches in reconfiguration process are governed by genetic algorithm(GA). Simulation results on IEEE 33-bus and IEEE 69-bus test systems concluded that the combinatorial method using DSTATCOM and reconfiguration is preferable to reduce power losses to 34.44% for 33-bus system and to 45.43% for 69-bus system.
文摘随着配电网复杂性日益增加以及对电能质量要求不断提高,谐波污染和网络损耗已成为影响新型电力系统稳定性和运行效率的关键因素。通过同步优化电容器和有源功率滤波器(active power filter,APF)的配置,实现谐波抑制与网络损耗最小化的双重目标。利用谐波功率流分析模型进行谐波评估,根据谐波穿透法进行频域建模。对失真配电网络中的电容器和APF的同步配置建模,利用粒子群优化(particle swarm optimization,PSO)算法解决电容器和APF同步配置的混合整数非线性规划问题。实验结果表明:适当配置电容器和APF能够显著改善网络的电压质量,所提的同步优化方法不仅在降低系统成本的同时,显著提高了新型电力系统配电网的电能质量和运行效率。
文摘低压配电台区负荷投切不规范或表计错误建档等工程问题都将导致云端业务系统出现拓扑数据异常(topology data exception,TDE)。这类情况多发生在电压曲线高度近似的同电源点网络,通过现有方法难以监测。为此提出了一种基于线损贡献度的同源低压配电台区拓扑数据治理方法。首先根据线损方程得到台区下终端用户的回归系数和线损贡献度指标,并将指标突破阈值的TDE逐轮撤出台区。接着针对多个异常拓扑功率堆叠使线损波动特征大量丢失的问题,提出回归系数强制趋向策略,通过构建贝叶斯回归模型并融入具有双峰特性的边界趋向鼓励机制进一步检出潜在的TDE。最后提出基于电压相关性和线损平衡的阶梯式归真模型,先通过相关性分析逐级定位TDE隶属的10kV首端大馈线和0.4kV低压台区集,再利用线损贡献度规则溯源其准确的户变关系,实现拓扑数据闭环治理。所提方法已部署至华东某电力公司数据中台,并用八百余个实际台区数据验证校核,识别准确率为97.05%,具备较好的鲁棒性与泛用性。