Integration of Solar Photovoltaic (PV) generation into an existing distribution system has many impacts on the system, with the power flow being one of the major issues. This impact is not generic for any network, but...Integration of Solar Photovoltaic (PV) generation into an existing distribution system has many impacts on the system, with the power flow being one of the major issues. This impact is not generic for any network, but it may manifest itself either positively or negatively, depending on the grid configuration, interface control modes, operation mode, and load profile. Grid-connected PV systems have three control options of the local voltage controller of the interface DC-AC converter. These control modes are Power Factor control, voltage control, and Droop Voltage control. This paper aims at evaluating and comparing the impacts of those control modes on the grid power flow. A set of evaluation criteria and indices is defined and mathematically formulated. Based on the requirements of the used program (Power Factory Dig Silent V14.1.3), a computation plan (algorithm) has been proposed. The algorithm has been applied to a typical weak network and a wide range of simulations has been carried out. Simulation results have been thoroughly discussed and important findings have been concluded.展开更多
国家电网工程建设信息化管理模式主要以项目建设业务流为主线,当前BIM技术的引入给建设管理带来新的手段和方式。分析传统信息化管理模式的特点,遵循实用、无感、可用、智能、整体五个基本原则,重新设计电网工程在建筑信息模型(building...国家电网工程建设信息化管理模式主要以项目建设业务流为主线,当前BIM技术的引入给建设管理带来新的手段和方式。分析传统信息化管理模式的特点,遵循实用、无感、可用、智能、整体五个基本原则,重新设计电网工程在建筑信息模型(building information modeling,BIM)环境下数字化建设管理模式,提出“电网工作包”的新理念,设计新模式下数字化管理平台的整体框架,对比分析两种管理模式的应用差异并在某新区电网进行实现和应用,验证新管理模式能有效提升电网建设管理水平。展开更多
文摘Integration of Solar Photovoltaic (PV) generation into an existing distribution system has many impacts on the system, with the power flow being one of the major issues. This impact is not generic for any network, but it may manifest itself either positively or negatively, depending on the grid configuration, interface control modes, operation mode, and load profile. Grid-connected PV systems have three control options of the local voltage controller of the interface DC-AC converter. These control modes are Power Factor control, voltage control, and Droop Voltage control. This paper aims at evaluating and comparing the impacts of those control modes on the grid power flow. A set of evaluation criteria and indices is defined and mathematically formulated. Based on the requirements of the used program (Power Factory Dig Silent V14.1.3), a computation plan (algorithm) has been proposed. The algorithm has been applied to a typical weak network and a wide range of simulations has been carried out. Simulation results have been thoroughly discussed and important findings have been concluded.
文摘国家电网工程建设信息化管理模式主要以项目建设业务流为主线,当前BIM技术的引入给建设管理带来新的手段和方式。分析传统信息化管理模式的特点,遵循实用、无感、可用、智能、整体五个基本原则,重新设计电网工程在建筑信息模型(building information modeling,BIM)环境下数字化建设管理模式,提出“电网工作包”的新理念,设计新模式下数字化管理平台的整体框架,对比分析两种管理模式的应用差异并在某新区电网进行实现和应用,验证新管理模式能有效提升电网建设管理水平。
