Voltage and var control to enable high penetration of distributed photovoltaic systems

2012 ◽  
Author(s):  
Yuan Liao ◽  
Wen Fan ◽  
Aaron Cramer ◽  
Paul Dolloff ◽  
Zongming Fei ◽  
...  
Keyword(s):  
Photovoltaic Systems ◽  
High Penetration

scholarly journals Rooftop Photovoltaic-Battery Systems to Mitigate Overvoltage and Under Voltage in a Residential Low Voltage Distribution System

2020 ◽  
Vol 190 ◽  
pp. 00028
Author(s):  
Praphawadee Charoenwattana ◽  
Umarin Sangpanich
Keyword(s):  
Energy Storage ◽  
Distribution System ◽  
Low Voltage ◽  
Storage Systems ◽  
Peak Time ◽  
Photovoltaic Systems ◽  
Voltage Distribution ◽  
Energy Storage Systems ◽  
High Penetration ◽  
Battery Systems

High penetration of rooftop photovoltaic systems in a residential low voltage distribution system has to be controlled in order to maintain stable voltage condition. Energy storage systems, such as batteries, can be used to absorb excess energy of photovoltaic systems and to shave peak load during on-peak time. This paper proposes guiding principles for the incorporation of energy storage systems into a residential low voltage distribution system with high penetration of rooftop photovoltaic systems. Real residential distribution system circuits and all parameters from the Geographic Information System database of the Provincial Electricity Authority in Thailand were used for simulation analysis to study the application of energy storage systems for regulating voltage in a range of the nominal voltage by 10 %. Solar radiation data from the PVGIS were used. The voltage results were simulated by using the DIgSILENT Power Factory program. Based on the simulation, it was found that the overvoltage and under voltage protection and energy loss reduction could be achieved by (i) installing small battery systems in households and (ii) installing battery stations within the vicinity of the transformer or the weakest point of the circuit.

scholarly journals Load Control by Demand Side Management to Support Grid Stability in Building Clusters

Energies ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 5112 ◽  
Author(s):  
Monika Hall ◽  
Achim Geissler
Keyword(s):  
Electric Vehicles ◽  
Capacity Utilization ◽  
Heat Pumps ◽  
Photovoltaic Systems ◽  
Existing Building ◽  
Agent Based ◽  
High Penetration ◽  
Multi Agent ◽  
The Impact ◽  
Support Grid

Increasing numbers of photovoltaic systems and heat pumps in existing building clusters can lead to an overload of the associated electric grid substations. Based on a multi-agent-based simulation of three building cluster types the impact of building flexibility in regard to the residual substation load is studied. Each building announces its available flexibility, e.g., “heat pump can be switched off/on”. A cluster master coordinator evaluates the incoming offers and decides which offers are accepted in regard to the substation’s capacity utilization. The goal is to honour the substation’s limit by shifting the residual load. This paper presents results from three typical urban building clusters for different penetration scenarios in regard to heat pumps, photovoltaic systems, batteries and electric vehicles. It is shown that in the studied building clusters a high penetration of heat pumps and photovoltaic systems can violate the existing substation’s limits, regardless of the efforts by the master coordinator. Batteries of typical capacities cannot reduce the peak residual load. The load shifting options of the master coordinator are limited.

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