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This paper considers the use of energy storage to mitigate the effects of power output transients... more This paper considers the use of energy storage to mitigate the effects of power output transients associated with photovoltaic systems due to fast-moving cloud cover. In particular, the combination of energy storage with `soft' normally-open points (SNOPs), referring to an AC/AC power electronic conversion device in place of switchgear, is considered. This paper will demonstrate the use of SNOPs with energy storage for providing this damping functionality simultaneous to its other functions. A formula to estimate the level of energy storage required to handle worst-case transient conditions, as well as two high-level control schemes for the SNOP are proposed then tested experimentally through simulation on typical distribution systems with measured historical insolation data.
Renewable & Sustainable Energy Reviews, 2010
Now is the time to plan for the integration of significant quantities of distributed renewable en... more Now is the time to plan for the integration of significant quantities of distributed renewable energy into the electricity grid. Concerns about climate change, the adoption of state-level renewable portfolio standards and incentives, and accelerated cost reductions are driving steep growth in U.S. renewable energy technologies. The number of distributed solar photovoltaic (PV) installations, in particular, is growing rapidly. As distributed PV and other renewable energy technologies mature, they can provide a significant share of our nation's electricity demand. However, as their market share grows, concerns about potential impacts on the stability and operation of the electricity grid may create barriers to their future expansion.
Increasing photovoltaics grid penetration in urban areas through active distribution systems: First large scale demonstration
MetaPV is the first project world-wide that will demonstrate the provision of electrical benefits... more MetaPV is the first project world-wide that will demonstrate the provision of electrical benefits from photovoltaics (PV) on a large scale, showing the way toward cities powered by renewable energy sources. Additional benefits for active grid support from PV will be demonstrated at two sites: a residential/urban area of 128 households with 4 kWp each, and an industrial zone of 31 PV systems with 200 kWp each in Limburg, Belgium. The project is demonstrating enhanced control capacities implemented into PV inverters, including active voltage control, low-voltage ride-through capability, autonomous grid operation, and interaction of distribution system control with PV systems. A detailed technical and financial assessment of the additional benefits from PV is also part of the project. The role of PV in an area fully supplied by renewable sources is to be assessed. Smart control should enable an increase of the market PV penetration in existing grids and promote the use of more renewable energy sources in cities and industries at minimum additional investment costs. The MetaPV project is accepted for funding by the European Commission in the 7th Framework Programme. It started in October 2009 and lasts to March 2014. The consortium consists of six partners from four EU countries.
This paper considers the use of energy storage to mitigate the effects of power output transients... more This paper considers the use of energy storage to mitigate the effects of power output transients associated with photovoltaic systems due to fast-moving cloud cover. In particular, the combination of energy storage with `soft' normally-open points (SNOPs), referring to an AC/AC power electronic conversion device in place of switchgear, is considered. This paper will demonstrate the use of SNOPs with energy storage for providing this damping functionality simultaneous to its other functions. A formula to estimate the level of energy storage required to handle worst-case transient conditions, as well as two high-level control schemes for the SNOP are proposed then tested experimentally through simulation on typical distribution systems with measured historical insolation data.
Renewable & Sustainable Energy Reviews, 2010
Now is the time to plan for the integration of significant quantities of distributed renewable en... more Now is the time to plan for the integration of significant quantities of distributed renewable energy into the electricity grid. Concerns about climate change, the adoption of state-level renewable portfolio standards and incentives, and accelerated cost reductions are driving steep growth in U.S. renewable energy technologies. The number of distributed solar photovoltaic (PV) installations, in particular, is growing rapidly. As distributed PV and other renewable energy technologies mature, they can provide a significant share of our nation's electricity demand. However, as their market share grows, concerns about potential impacts on the stability and operation of the electricity grid may create barriers to their future expansion.
Increasing photovoltaics grid penetration in urban areas through active distribution systems: First large scale demonstration
MetaPV is the first project world-wide that will demonstrate the provision of electrical benefits... more MetaPV is the first project world-wide that will demonstrate the provision of electrical benefits from photovoltaics (PV) on a large scale, showing the way toward cities powered by renewable energy sources. Additional benefits for active grid support from PV will be demonstrated at two sites: a residential/urban area of 128 households with 4 kWp each, and an industrial zone of 31 PV systems with 200 kWp each in Limburg, Belgium. The project is demonstrating enhanced control capacities implemented into PV inverters, including active voltage control, low-voltage ride-through capability, autonomous grid operation, and interaction of distribution system control with PV systems. A detailed technical and financial assessment of the additional benefits from PV is also part of the project. The role of PV in an area fully supplied by renewable sources is to be assessed. Smart control should enable an increase of the market PV penetration in existing grids and promote the use of more renewable energy sources in cities and industries at minimum additional investment costs. The MetaPV project is accepted for funding by the European Commission in the 7th Framework Programme. It started in October 2009 and lasts to March 2014. The consortium consists of six partners from four EU countries.