Sensitivity of Low-Voltage Grid Impact Indicators to Modeling Assumptions and Boundary Conditions in Residential District Energy Modeling

摘要

Heat pump and photo-voltaic grid impact study at low-voltage level requires detailed simulation of multiple grids and scenarios, inevitably involving assumptions and scope restrictions. This paper investigates the influence of several assumptions on grid impact indicators, namely voltage levels and load, based on a probabilistic district simulation framework developed in previous work. Grid simplification, simulation and data temporal resolution and sampling repetitions are examined, along with variation in boundary conditions, namely transformer reference voltage and capacity, and heat pump power factor. The sensitivity study shows the accuracy loss resulting from low-resolution data and grid simplification, while also highlights the necessity to take into consideration uncertain parameters, such as the reference voltage and heat pump power factor.