In this presentation, Ingeteam as a manufacturer of large-scale central inverters for solar PV in Australia will share their experiences on the grid connection process and challenges for large-scale solar PV integration in Australia (particularly in the NEM network). Ingeteam has supplied around 3 GW of central inverters for solar PV plants across Australia and 18 GW globally.
1. Introduction about Ingeteam and its technologies.
2. Is the Australian grid ready for more Renewable Energy Sources (RESs)
Types of technologies that can help to penetrate more RESs into the weak grid
3. Key technical challenges and experience in the large PV plant integration.
Grid connection rules, simulation studies and compliances
Real field test performance and simulation model validation
Distribution companies in many countries are finding it challenging to allow residential and commercial customers to continue to install photovoltaic (PV) systems due to the potential technical impacts resulting from high penetrations. To remove these barriers, speed up connection times, and reduce costs, distribution companies are being asked by regulators to increase the PV hosting capacity of their low and medium voltage feeders. Adequately exploiting the capabilities of customer and grid-side solutions will be key.
This half-day tutorial will present and discuss different aspects required to assess the PV hosting capacity of distribution feeders. Based on the findings from the project “Advanced Planning of PV-Rich Distribution Networks” funded by the Australian Renewable Energy Agency (ARENA) and the distribution company AusNet Services, the tutorial will also present and discuss the benefits from adopting traditional and non-traditional solutions to increase the hosting capacity of PV-rich distribution networks. It includes the results of one the most advanced, highly-granular, detailed studies performed on multiple fully-modelled 22kV feeders (including pseudo low voltage networks) from Victoria, Australia considering time-series seasonal analyses and growing penetrations of solar PV.
1:00pm-1:50pm: Distribution Networks and Solar PV
The Basics. PV Hosting Capacity, Challenges, and Potential Solutions. Overview of the impacts from reverse power flows in low and medium voltage networks as well as the range of potential solutions to mitigate them.
Modelling of Distribution Networks. From Basic to State-of-the-Art. Overview of the different modelling considerations needed to carry out detailed network studies and PV hosting capacity assessments.
2:00pm-2:50pm: Traditional and Non-Traditional Solutions
Traditional Solutions. Benefits from adopting traditional solutions such as adequate Volt-Watt and Volt-var PV inverter settings, change of off-load and on-load tap changer positions and/or network augmentation to increase the hosting capacity of PV-rich distribution networks.
Non-Traditional Solutions. Benefits from adopting non-traditional solutions such as OLTC-fitted LV transformers, Battery Energy Storage (BES) systems with Off-the-Shelf (OTS) and smarter controllers in combination with traditional solutions, and dynamic use of OLTCs at primary substations aiming at increasing the solar PV hosting capacity of PV-rich distribution networks.
3.00pm-3:30pm: Complete Solutions: Performance and Cost
Different complete solutions (combinations of traditional and non-traditional solutions) that mitigate both voltage and asset congestion problems to achieve high PV hosting capacities are compared considering net present value accounting for both the CapEx and OpEx.
3:30pm-4:00pm: Planning Recommendations, Conclusions and Further Q&A
This part provides a series of planning recommendations to help distribution companies in Australia, and internationally, take adequate planning actions that facilitate the widespread adoption of residential PV in a cost-effective and practical manner.
While renewable energy integration with advanced control methods is one of most promising research trends in power system, a gap between research and industry problems has been an area of concern. To remove these gaps and to create a pathway, this tutorial will focus on advanced research challenges and will highlight Australian Power Industry regulations. Furthermore, the tutorial will portray how Australian Industry Regulations such as National Electricity Rules (NER) can be used to make the research solutions and validations more meaningful and industry oriented.
1. Introduction to renewable energy in Australia
Trend of renewable energy in Australia
Renewable energy modeling
2. Grid integration process and industry regulations
Discussions on National Electricity Rules (NER)
Introduction to the Dynamic Model Acceptance Tests (DMAT)
Challenges and opportunities in generator grid connection
Examples of PV farm modelling in PSSE and PSCAD
3. Advanced network and control in power system
Multi-terminal DC network
Key challenges in self-healing of converter modeling
Steady state analysis and time domain results investigations on PSCAD
4. Research with a focus on Australian Industry problems.
Applying NER rules into research study
Understanding system strength
Integrating weak grids into research test system