Towards maximising the integration of renewable energy hybrid distributed generations for small signal stability enhancement: A review
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Date
2019-08-12
Journal Title
Journal ISSN
Volume Title
Publisher
International Journal Energy Res. 2020
Abstract
Integrating renewable energy hybrid distributed generation (REHDG) into
distribution network systems (DNSs) has become increasingly important
because of various technical, economic, and environmental advantages accruing
from it. However, the output power of REHDGs from photovoltaic
(PV) and wind is highly variable because of its dependency on intermittent
parameters such as solar irradiance, temperature, and wind speed. Such variability
of generated power from large-scale REHDGs or load introduces small
signal instabilities (oscillations). Meanwhile, different locations of integration
and sizes of REHDGs in the DNS affect the system oscillation modes by
either improving or depriving the small-signal stability (SSS) of the network.
Consequently, a significant number of research has been conducted on the
planning of optimal allocation of REHDGs in DNS. In this regard, this paper
reviews the existing planning models, optimisation techniques, and resources'
uncertainty modelling employed in REHDGs allocations in terms of their capability
in obtaining optimal solutions and enhancing SSS of the system. Planning
models with optimisation algorithms are evaluated for modelling renewable
resource uncertainties and curtailing SSS variables. Researchworks on planning
of optimal allocation of these generations attain minimum cost, but were unable
to satisfy the SSS requirements of the system. The existing models for the planning
and design of optimal timing, sizing, and placement of REHDGs will need
to be improved to optimally allocate REHDGs and satisfy the SSS of the DNS
after the integration.
Description
Keywords
distribution network, renewable energy, distributed generation, optimization methods, small-signal stability