Doctoral Thesis
Strategic Deployment of Utility-scale Energy Storage Systems in Renewable-integrated Power Grids
Doctor of Philosophy (PhD), Murdoch University
2024
Abstract
Rising global energy demand has intensified fossil fuel consumption, increased living costs, and exacerbated environmental pollution. In response, renewable distributed generation systems (DGs), especially wind and solar power, has surged due to their cost-efficient and eco-friendly characteristics. However, the inherent randomness and intermittency of wind and solar energy mean that integrating large-scale renewable DGs can challenge power networks’ voltage and frequency stability, leading to increased power losses and compromised power quality. Integrating an energy storage system (ESS) with the grid effectively stabilizes system frequency and voltage, as it can absorb and supply both active and reactive power when required. Nevertheless, one of the primary barriers to the broader adoption of ESS is its high investment cost. To reduce ESS investment costs and enhance its efficiency, it is crucial to consider ESS installation locations and capacities.
This thesis introduces innovative contributions to optimise ESS allocation in power grids, particularly focusing on weak grids with high levels of renewable DG penetration. The research proposes a strategic ESS allocation method that enhances system reliability and improves transient voltage and frequency stability. It also explores deviations in voltage and frequency under various system strengths and compares the efficacy of uniform versus non-uniform ESS allocation strategies in enhancing system performance and reducing costs. Furthermore, it examines the impact of optimal ESS planning on both balanced and unbalanced distribution networks, emphasizing improvements in system reliability and operational cost efficiencies.
The effectiveness of the proposed methods has been validated through numerical simulations. Utilities can utilise the findings of this research as a benchmark to elevate system performance and reduce investment costs of their power grids. This work not only contributes to the theoretical understanding of ESS impacts on grid stability but also provides practical insights for energy policy and system planning.
Details
- Title
- Strategic Deployment of Utility-scale Energy Storage Systems in Renewable-integrated Power Grids
- Authors/Creators
- Dong Zhang
- Contributors
- GM Shafiullah (Supervisor) - Murdoch University, Centre for Water, Energy and WasteChoton Kanti Das (Supervisor) - Edith Cowan UniversityKevin Wong (Supervisor) - Murdoch University, Centre for Water, Energy and Waste
- Awarding Institution
- Murdoch University; Doctor of Philosophy (PhD)
- Identifiers
- 991005672969907891
- Murdoch Affiliation
- School of Engineering and Energy
- Resource Type
- Doctoral Thesis
UN Sustainable Development Goals (SDGs)
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