Techno-Economic Analysis of Residential Energy System under Various Support Schemes

Abstract

In this research, two different scenarios aiming to reduce the impact of net-metering abolishment for prosumers in the residential sector is analysed. Scenario I consist of integrating a battery energy storage system (BESS) into the existing photovoltaic (PV) system to store the surplus energy. Scenario II consists of establishing a power and ICT connection with a nearby charging station (CS) and trade the surplus energy as a charging source for the electric vehicle. To simulate the scenarios, we will use households demand and PV generation data from PARENT project in Borneo-Eiland neighbourhood, Amsterdam. Two different energy price dynamic, flat retail price and day-ahead APX price are introduced to investigate its impact on the household’s power interaction. As for the support schemes, we will assume that net-metering is abolished in the future and the price for injecting surplus energy back to the grid is reduced by 70% - 80% and the CS trade price is 90% of the electricity absorption price. These support schemes are then defined as scheme A, B, and C.

The simulation shows that for scenario I, APX price generates a higher net saving than flat price due to the better utilisation of BESS that actively responds to the price fluctuations. It is the other way around in scenario II, where flat price will achieve a higher financial benefit as the amount of savings generated from the price difference between CS trade price and grid absorption price is constant.

When we apply different support schemes for both scenarios, it is clear that scenario I will always achieve a higher amount of net savings compared to scenario II, but its economic feasibility depends on its investment cost. When the investment cost for scenario I considered to be economically unfeasible by the household, Scenario II become a better option since its investment cost is minimal while still generate savings. Also, when more CS is connected in scenario II, its financial benefit increases as more CS demand is available when the surplus energy amount is high.