With the growing number and capacity of photovoltaic(PV)installations connected to distribution networks,power quality issues related to voltage regulation are becoming relevant problems for power distribution compani...With the growing number and capacity of photovoltaic(PV)installations connected to distribution networks,power quality issues related to voltage regulation are becoming relevant problems for power distribution companies and for PV owners.In many countries,like Italy,this has required the revision of the standards concerning the connection to the public distribution network of distributed renewable generation.The new standards require a flexible operation of generation plants that have to be capable to change the active and reactive power dynamically in function of the network parameters(i.e.frequency and network local voltage)in local control or following external commands.Therefore,this paper investigates the use of smart inverter in a critical PV installation,where relevant voltage fluctuations exist.A case study,with real network parameters monitoring data and measurements,is discussed in the paper with the aim of showing how‘smart’features of new inverters can be implemented to increase PV plant integration in low voltage distribution networks.展开更多
提出了一种基于ESAC(Energy Systems Analysis Consortium)标准的分布式电源系统稳定裕度监控方法,推导出当分布式电源系统不满足稳定裕度要求时,源级开关电源输出阻抗与负载级开关电源输入阻抗之间的约束关系。在此基础上,利用外加小...提出了一种基于ESAC(Energy Systems Analysis Consortium)标准的分布式电源系统稳定裕度监控方法,推导出当分布式电源系统不满足稳定裕度要求时,源级开关电源输出阻抗与负载级开关电源输入阻抗之间的约束关系。在此基础上,利用外加小信号电流扰动法实现了基于ESAC标准的分布式电源系统稳定裕度监控,并给出了具体实现电路。最后,以双Buck级联分布式电源系统为例,通过仿真证实了该监控方法的可行性与优越性。展开更多
文摘With the growing number and capacity of photovoltaic(PV)installations connected to distribution networks,power quality issues related to voltage regulation are becoming relevant problems for power distribution companies and for PV owners.In many countries,like Italy,this has required the revision of the standards concerning the connection to the public distribution network of distributed renewable generation.The new standards require a flexible operation of generation plants that have to be capable to change the active and reactive power dynamically in function of the network parameters(i.e.frequency and network local voltage)in local control or following external commands.Therefore,this paper investigates the use of smart inverter in a critical PV installation,where relevant voltage fluctuations exist.A case study,with real network parameters monitoring data and measurements,is discussed in the paper with the aim of showing how‘smart’features of new inverters can be implemented to increase PV plant integration in low voltage distribution networks.
文摘提出了一种基于ESAC(Energy Systems Analysis Consortium)标准的分布式电源系统稳定裕度监控方法,推导出当分布式电源系统不满足稳定裕度要求时,源级开关电源输出阻抗与负载级开关电源输入阻抗之间的约束关系。在此基础上,利用外加小信号电流扰动法实现了基于ESAC标准的分布式电源系统稳定裕度监控,并给出了具体实现电路。最后,以双Buck级联分布式电源系统为例,通过仿真证实了该监控方法的可行性与优越性。
