|
Namangan Institute of Engineering and Technology
Pdf ko'rish
|
| bet | 655/693 | | Sana | 13.05.2024 | | Hajmi | 15,56 Mb. | | #228860 |
Bog'liq ТўпламNamangan Institute of Engineering and Technology
nammti.uz
10.25.2023
Pg.602
into six phases. In Phase 1, VRE deployment has no noticeable impact on power system
operations, while the power system is able to address minor operational changes through existing
system resources including conventional generators and operational practices in Phase 2. The
significant integration challenges appear in Phase 3, in which power systems are required to
become flexible enough to adequately respond to supply-demand fluctuations within minutes to
hours. In Phase 3 through Phase 6, the following implication needs to be considered: 1) VRE
determines the operating pattern of the whole power system; 2) additional investments in
flexibility are required; 3) there are structural surpluses of VRE generation that lead to
curtailment; and 4) the seasonal and inter-year structural imbalances in energy supply require
sectoral coupling.
Looking at the status of VRE integration in Uzbekistan, the VRE share in the power mix was
negligible, at 0.02% (15.6 GWh) in 2019, meaning that today VRE has almost no impact on the
power system. However, Uzbekistan should achieve a renewable electricity share (including
hydropower generation) of 25% by 2030 in line with the Strategy for the Transition of the Republic
of Uzbekistan to the Green Economy for the Period 2019-2030. It could reach the advanced VRE
integration stage where the system operation needs to address greater fluctuation of VRE
generation and facilitate additional flexibility sources. Flexibility has been traditionally and
globally supplied by thermal and hydropower generation together with other options such as
pumped storage hydropower (PSH) and interconnections. This conventional rotating generation
is based on synchronous machines, providing inertia to the system. In Uzbekistan, TPPs account
for a large portion of electricity assets (14.0 GW, or 88.1% in 2019) followed by HPPs (1.9 GW, or
11.9% in the same year) (IEA, 2020a), and both technologies not only ensure sufficient power
supply, but also should be served as flexibility sources through optimised system operation in the
medium term.It must be kept in mind that solar PV plants themselves can provide flexibility to
|
| |
