Abstract
Connection of a significant amount of distributed generation, such as solar photovoltaic (PV) capacity, may lead to problems in distribution networks due to violations of distribution network hosting capacity (HC) limits. HC enhancement techniques, such as energy storage, could increase the allowable PV penetration level in the distribution network, reducing the need for transmission and large-scale generation expansion. However, current approaches for transmission and generation expansion planning do not account for distribution network HC limits. As a consequence, it is hard to quantify the impact and benefits of HC enhancement in the context of long-term grid expansion planning. This paper presents a novel integrated planning approach, combining a two-stage transmission and generation expansion planning model with a distribution network hosting capacity assessment, which allows for inclusion of detailed distribution network constraints We test this method on a stylized representation of the Malaysian grid. Our results show that distribution constraints have a significant impact on optimal transmission expansion plans and significantly increase overall system costs. HC enhancement in the form of battery storage does not significantly mitigate this but does lead to a cost decrease regardless of distribution network constraints. We also show how our approach can identify the key interactions between transmission and distribution networks in systems with high levels of renewable and storage technologies. In particular, HC enhancement with battery storage can act as a substitute or complement to line investment, depending on the renewable energy penetration, the storage location and the level of coordination in the network.
Highlights
Renewable generation capacity is growing significantly as a result of technology advancement and policies that aim to reduce the (CO2 ) emissions, including carbon prices and renewable targets.Solar photovoltaic (PV) generation capacity has increased quickly and in many places, it is among the cheapest forms of electricity generation
hosting capacity (HC) enhancement with battery storage can act as a substitute or complement to line investment, depending on the renewable energy penetration, the storage location and the level of coordination in the network
We have proposed and demonstrated an integrated planning model that allows distribution network hosting capacity (HC) constraints to be included in long term grid planning
Summary
Solar photovoltaic (PV) generation capacity has increased quickly and in many places, it is among the cheapest forms of electricity generation. Solar PV capacity comes in different forms. Large solar photovoltaic (LPV) plants may be connected to transmission networks, as other types of renewable capacity, including wind, tend to be. In most markets, a large fraction of solar PV capacity is connected to distribution networks (distributed solar photovoltaic, DPV), beyond the transmission system operator’s control. This DPV capacity can cause significant problems in distribution networks, including reverse power flows, voltage excursions and frequency issues
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
