为分析智能软开关(soft open point,SOP)连续调节能力对柔性配电网(flexible distribution network,FDN)风险的影响。首先,实现基于三点估计的FDN风险评估方法;采用三点估计法结合交直流交替迭代法和Gram-Charlier级数展开法进行FDN概...为分析智能软开关(soft open point,SOP)连续调节能力对柔性配电网(flexible distribution network,FDN)风险的影响。首先,实现基于三点估计的FDN风险评估方法;采用三点估计法结合交直流交替迭代法和Gram-Charlier级数展开法进行FDN概率潮流计算,获得节点电压与支路有功功率的概率密度函数,使用越限偏移量结合风险偏好型效用函数构建严重度函数,根据风险评估理论建立并计算风险评估指标。其次,在此基础上,提出一种计及SOP参数优化的FDN风险评估方法;以系统总风险最低为目标,建立计及SOP参数优化的FDN风险评估模型,采用粒子群优化算法结合基于三点估计的FDN风险评估方法对其进行求解,用得到的结果去配置SOP,并对此FDN进行风险评估。以3个IEEE 33节点网络通过三端口SOP互联形成的FDN为例,验证了所提风险评估方法的有效性,分析了SOP连续调节能力以及不同接入位置对FDN风险的影响。展开更多
The integration of distributed generation brings in new challenges for the operation of distribution networks,including out-of-limit voltage and power flow control.Soft open points(SOP)are new power electronic devices...The integration of distributed generation brings in new challenges for the operation of distribution networks,including out-of-limit voltage and power flow control.Soft open points(SOP)are new power electronic devices that can flexibly control active and reactive power flows.With the exception of active power output,photovoltaic(PV)devices can provide reactive power compensation through an inverter.Thus,a synergetic optimization operation method for SOP and PV in a distribution network is proposed.A synergetic optimization model was developed.The voltage deviation,network loss,and ratio of photovoltaic abandonment were selected as the objective functions.The PV model was improved by considering the three reactive power output modes of the PV inverter.Both the load fluctuation and loss of the SOP were considered.Three multi-objective optimization algorithms were used,and a compromise optimal solution was calculated.Case studies were conducted using an IEEE 33-node system.The simulation results indicated that the SOP and PVs complemented each other in terms of active power transmission and reactive power compensation.Synergetic optimization improves power control capability and flexibility,providing better power quality and PV consumption rate.展开更多
为提升含不确定性分布式电源的配电网在大面积停电后的恢复能力,提出智能软开关SOP(soft open point)优化配置方法。首先,以SOP年投资成本、年维护成本及配电网年负荷损失成本之和最小为目标函数,构建基于改进孤岛划分的SOP两阶段鲁棒...为提升含不确定性分布式电源的配电网在大面积停电后的恢复能力,提出智能软开关SOP(soft open point)优化配置方法。首先,以SOP年投资成本、年维护成本及配电网年负荷损失成本之和最小为目标函数,构建基于改进孤岛划分的SOP两阶段鲁棒优化配置模型;其次,提出遗传算法与列约束生成算法相结合的混合求解算法,通过对SOP两阶段鲁棒优化配置模型进行分段求解以加快收敛速度;最后,利用IEEE 33节点系统验证所提模型和算法的有效性及优越性。展开更多
柔性软开关(soft open points,SOP)具有端口间的功率连续调节功能,可解决配电网与分布式电源协同运行带来的问题,同时可提升系统可靠性和供电能力。针对当前尚且缺乏具体度量手段量化SOP的配置成效问题,提出了考虑可靠性的含四端SOP有...柔性软开关(soft open points,SOP)具有端口间的功率连续调节功能,可解决配电网与分布式电源协同运行带来的问题,同时可提升系统可靠性和供电能力。针对当前尚且缺乏具体度量手段量化SOP的配置成效问题,提出了考虑可靠性的含四端SOP有源配电网供电能力评估方法。首先,研究了四端SOP的接入拓扑和组网模式,分析了四端SOP在配电网正常运行和故障恢复过程中的控制模式;其次,结合馈线分区理念,研究了四端SOP对配电网故障后不同馈线分区停电时间的影响,构建了含四端SOP有源配电网的故障模式影响分析和负荷削减与转供模型,并提出了可靠性评估方法;再次,以可靠性为约束,建立了含四端SOP有源配电网供电能力评估模型,并提出了求解方法。最后,通过算例验证了所提方法的有效性和实用性。展开更多
文摘为分析智能软开关(soft open point,SOP)连续调节能力对柔性配电网(flexible distribution network,FDN)风险的影响。首先,实现基于三点估计的FDN风险评估方法;采用三点估计法结合交直流交替迭代法和Gram-Charlier级数展开法进行FDN概率潮流计算,获得节点电压与支路有功功率的概率密度函数,使用越限偏移量结合风险偏好型效用函数构建严重度函数,根据风险评估理论建立并计算风险评估指标。其次,在此基础上,提出一种计及SOP参数优化的FDN风险评估方法;以系统总风险最低为目标,建立计及SOP参数优化的FDN风险评估模型,采用粒子群优化算法结合基于三点估计的FDN风险评估方法对其进行求解,用得到的结果去配置SOP,并对此FDN进行风险评估。以3个IEEE 33节点网络通过三端口SOP互联形成的FDN为例,验证了所提风险评估方法的有效性,分析了SOP连续调节能力以及不同接入位置对FDN风险的影响。
基金supported by the Science and Technology Project of SGCC(kj2022-075).
文摘The integration of distributed generation brings in new challenges for the operation of distribution networks,including out-of-limit voltage and power flow control.Soft open points(SOP)are new power electronic devices that can flexibly control active and reactive power flows.With the exception of active power output,photovoltaic(PV)devices can provide reactive power compensation through an inverter.Thus,a synergetic optimization operation method for SOP and PV in a distribution network is proposed.A synergetic optimization model was developed.The voltage deviation,network loss,and ratio of photovoltaic abandonment were selected as the objective functions.The PV model was improved by considering the three reactive power output modes of the PV inverter.Both the load fluctuation and loss of the SOP were considered.Three multi-objective optimization algorithms were used,and a compromise optimal solution was calculated.Case studies were conducted using an IEEE 33-node system.The simulation results indicated that the SOP and PVs complemented each other in terms of active power transmission and reactive power compensation.Synergetic optimization improves power control capability and flexibility,providing better power quality and PV consumption rate.
文摘为提升含不确定性分布式电源的配电网在大面积停电后的恢复能力,提出智能软开关SOP(soft open point)优化配置方法。首先,以SOP年投资成本、年维护成本及配电网年负荷损失成本之和最小为目标函数,构建基于改进孤岛划分的SOP两阶段鲁棒优化配置模型;其次,提出遗传算法与列约束生成算法相结合的混合求解算法,通过对SOP两阶段鲁棒优化配置模型进行分段求解以加快收敛速度;最后,利用IEEE 33节点系统验证所提模型和算法的有效性及优越性。
文摘柔性软开关(soft open points,SOP)具有端口间的功率连续调节功能,可解决配电网与分布式电源协同运行带来的问题,同时可提升系统可靠性和供电能力。针对当前尚且缺乏具体度量手段量化SOP的配置成效问题,提出了考虑可靠性的含四端SOP有源配电网供电能力评估方法。首先,研究了四端SOP的接入拓扑和组网模式,分析了四端SOP在配电网正常运行和故障恢复过程中的控制模式;其次,结合馈线分区理念,研究了四端SOP对配电网故障后不同馈线分区停电时间的影响,构建了含四端SOP有源配电网的故障模式影响分析和负荷削减与转供模型,并提出了可靠性评估方法;再次,以可靠性为约束,建立了含四端SOP有源配电网供电能力评估模型,并提出了求解方法。最后,通过算例验证了所提方法的有效性和实用性。
