VALUE OF NET-FIT PV POLICIES FOR DIFFERENT ELECTRICITY INDUSTRY PARTICIPANTSCONSIDERING DEMAND SIDE RESPONSE

摘要

Net-FiT policies for residential PV have financial implications not only for PV customers but all otherelectricity industry participants. They may also incentivise households to adjust their daily load patterns to eitherminimise or maximise PV export depending on the FiT design, and wider retail electricity arrangements. In this paperwe study the financial implications of both residential PV systems and such demand-side response (DSR) on thefinancial returns of PV for households, their retailers and their distribution network service providers (DNSPs). Weuse half-hourly PV generation and household consumption data for 60 houses in the Australian city of Sydney, andconsider two net-FiT designs offering tariffs either significantly higher or lower than retail electricity rates. We use asimple model of DSR which allows households to increase PV exports or self-consumption by moving load betweendaylight hours and the evening. We find such DSR modestly improve household revenue, but has potentially greaterimplications for retailers and DNSPs. DSR to increase exports reduces the adverse impacts of PV on retailer andDNSP revenues, whilst increased self-consumption worsens them. Conversely, increased exports might drive DNSPexpenditures in constrained network areas while increased self-consumption might help reduce them. The studyhighlights the importance of designing PV policies with regard to their implications for retailers and DNSPs as wellas PV households. Furthermore, the broader policy settings of retail electricity markets will become increasinglyimportant as PV deployment grows, opportunities for DSR expand, and current inadequacies in retail electricitymarkets become more marked.