Abstract
Isolated communities are progressively integrating renewable generation to reduce the societal, economic and ecological cost of diesel generation. Unfortunately, as renewable penetration and load variability increase, systems require greater diesel generation reserves, constraining renewable utilisation. Improved diesel generator flexibility can reduce the requirement for diesel reserves, allowing increased renewable hosting. Regrettably, it is uncommon for utilities to modify diesel generator control during the integration of renewable source generation. Identifying diesel generator flexibility and co-ordination as an essential component to optimising system hosting capacity, this paper investigates improved diesel generator flexibility and coordination via low-load diesel application. Case study comparisons for both high- and low-penetration hybrid diesel power systems are presented in King Island, Australia, and Moloka`i, Hawai`i, respectively. For King Island, the approach details a 50% reduction in storage requirement, while for Moloka`i the application supports a 27% increase in renewable hosting capacity.
Highlights
Isolated power systems (IPSs) have historically relied on diesel generation given the accessibility, reliability and maintainability of the technology
A number of IPSs with improved generation and load control have been created to mitigate the need for storage [7,8,9]
In assessing what additional near-term applications may further benefit Moloka‘i, this paper explores explores the role of low-load diesel to support generator flexibility and co-ordination
Summary
Isolated power systems (IPSs) have historically relied on diesel generation given the accessibility, reliability and maintainability of the technology. To eliminate diesel generation, enabling technologies such as energy storage are required. A number of IPSs with improved generation and load control have been created to mitigate the need for storage [7,8,9]. To this end, this paper assesses the role of low-load diesel within two innovative case studies, King Island, Tasmania, a high-penetration wind
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