digsilent-nem-studies/
│
├── projects/
│ ├── 01-solar-farm-connection/ # 150MW solar PV, NER Chapter 5 connection study
│ ├── 02-bess-weak-grid/ # 200MW BESS, system strength, GFL vs GFM
│ ├── 03-inertia-frequency/ # Coal retirement, FFR, synthetic inertia
│ ├── 04-synchronous-condenser/ # Syncon sizing, SA system strength
│ └── 05-python-automation/ # Automated connection assessment tool
│
├── scripts/
│ ├── load_flow/ # Python API — load flow automation
│ ├── fault_studies/ # Fault level screening scripts
│ ├── dynamic_sim/ # RMS results extraction and plotting
│ └── automation/ # Full connection assessment pipeline
│
├── docs/
│ ├── aemo-reading-notes/ # Notes on key AEMO documents
│ └── study-documentation/ # Study methodology write-ups
│
└── interview/
├── senior-engineer-qa.md # Senior engineer interview Q&A
└── principal-engineer-qa.md # Principal engineer interview Q&A
| # | Project | Key Skills | AEMO Relevance |
|---|---|---|---|
| 1 | Solar Farm Connection Study | Load flow, N-1, fault, LVRT | NER S5.2 connection process |
| 2 | BESS Weak Grid + System Strength | GFL/GFM, SCR, SSIAG | System Strength framework |
| 3 | Inertia & Frequency Response | FFR, ROCOF, virtual inertia | Inertia Requirements Methodology |
| 4 | Synchronous Condenser Assessment | Syncon, fault level, AFL | SA system strength remediation |
| 5 | Python Automated Assessment Tool | Python API, automation | Scalable connection screening |
All projects are designed around real NEM scenarios:
- System strength decline in South Australia and NSW as coal retires
- BESS connection boom — 26GW in the pipeline as of 2025 per AEMO Draft 2026 ISP
- Grid-forming inverter deployment — ARENA-funded 2GW/4.2GWh of GFM batteries 2024–2026
- NER Chapter 5 / S5.2 — the legal technical framework for all generator connections
- AEMO SSIAG — System Strength Impact Assessment Guidelines governing IBR connections
- DIgSILENT PowerFactory — primary simulation tool
- Python (PowerFactory API) — automation and result processing
- PSCAD — EMT studies (referenced where applicable)
- PSS/E — network equivalencing and cross-validation
| Document | Source |
|---|---|
| NER Schedule 5.2 — Technical Standards | AEMC |
| AEMO System Strength Impact Assessment Guidelines (SSIAG) v2.2 | AEMO |
| AEMO Connection Enquiry Guidelines | AEMO |
| AEMO 2024 System Strength Report | AEMO |
| AEMO Draft 2026 Integrated System Plan | AEMO |
| AEMO EMT Model Quality System | AEMO |
| ElectraNet System Strength RIT-T | ElectraNet |
| ESIG — Australian Landscape of Grid-Forming Batteries | ESIG/ARENA |
This repository is a living document — updated as studies are completed.