by Oleksandr Afanasenko | Director Dela Vitality Methods
Kyiv, Ukraine (SPX) Dec 12, 2021
The event of photo voltaic power in international locations with a restricted useful resource of free land more and more depends on bringing degraded and technogenically disturbed areas into use. Former agricultural yards, exhausted industrial websites, landfills, and deserted factories represent a major land reserve, whereas concurrently creating environmental and concrete planning dangers. Reworking such areas into websites for the location of solar energy crops (SPP) makes it doable to mix the targets of the power transition, land reclamation, and enhancement of the funding attractiveness of areas.
Ukrainian follow within the building of ground-mounted and solar energy stations for personal wants demonstrates that, with a sound engineering and organizational strategy, even extraordinarily advanced websites might be successfully built-in into the power infrastructure. The venture portfolio carried out by the writer consists of services positioned on former municipal landfills, deserted automobile fleet websites, sugar factories, brick manufacturing areas, in addition to giant solar energy stations for personal wants crops on the roofs and industrial yards of Nestle, MHP, Obolon, and different firms. Most services are characterised by non-standard geotechnical situations, a excessive density of underground and overhead utilities, tight implementation schedules, and the necessity for reconstruction of grid infrastructure (the Vysokivska, Beryslavska, and different substations).
The portfolio of carried out initiatives demonstrates a variety of situations for the redevelopment of problematic areas. A consultant instance is the ground-mounted PV energy plant Tavanska 1 with a capability of 8,56 MW in Kherson area. The power is positioned on the positioning of a former landfill with comfortable soils and a major slope. Implementation of the venture required large-scale elimination of floor waste, terrain grading, and using solely crawler equipment for motion over the weak basis. To forestall erosion and pile undermining, a stormwater drainage system was designed. The scope of labor included pile driving operations, laying of cable strains, set up of metal buildings, set up of Jinko modules and SMA inverters, and building of a transformer substation. The plant acquired a inexperienced tariff of 15,03 eurocents and ensured a discount in electrical energy withdrawal from public grids by greater than 11 000 MWh per 12 months.
The PV energy plant Asteria with a capability of 6,4 MW is positioned inside the service yard of a giant farm, the place silo pits as much as 8 m deep and big foundations from previous buildings have been current. To make sure the bearing capability of the soil, the heaviest tamping rollers obtainable in the marketplace have been used, interfering foundations have been dismantled, and an modern entry highway system proof against excessive groundwater ranges and unfastened soils was carried out. A key engineering and organizational resolution was the event of a grid connection venture with full reconstruction of the substation Vysokivska, which made it doable to cut back the commissioning time of the plant by three months whereas sustaining a excessive degree of reliability of the grid infrastructure.
The initiatives Blahovishchenska (2,72 and a pair of,86 MW) and Zlatopilska (4,72 and seven,11 MW) have been carried out on the territories of a former sugar plant and low-value lands sophisticated by the necessity to lay cable strains beneath highways and thru residential areas with a excessive density of utility networks. For these services, applied sciences of horizontal directional drilling, building of vertical cable ducts, in addition to in-house designs of built-in transformer-inverter substations have been utilized. This resolution not solely ensured the technical feasibility of the grid connection, but additionally elevated the inexperienced tariff charge by roughly on account of optimization of the tools configuration and minimization of losses.
A particular group is shaped by solar energy stations for its personal wants PV energy crops on the roofs and industrial yards of the enterprises Nestle, MHP, ECO-BERRY, Obolon. These initiatives are oriented towards self-consumption and have been accompanied by participation in open tenders, coordination of technical options with worldwide workplaces, strict time constraints, and the impossibility of interrupting the continual manufacturing cycle. For rooftop PV energy crops, technological options have been utilized that reduce the load on load-bearing buildings and enhance the non-combustibility class of roofing, in addition to layouts for module placement on a number of dozen roofs, bearing in mind personnel security and upkeep logistics. Because of this, the enterprises achieved a median annual discount in electrical energy consumption from the exterior grid of 20-35%, which confirms the effectiveness of integrating photo voltaic technology into industrial infrastructure.
Comparability of the initiatives thought of makes it doable to conclude {that a} particular strategy to PV plant growth is being shaped in Ukrainian follow, targeted not on the seek for superb websites, however on the technological adaptation of advanced territories. Such an strategy requires from the design and building staff a excessive diploma of flexibility, readiness to work with non-standard geotechnical situations and a dense community of infrastructural constraints.
The carried out services reveal that competent preliminary elaboration of land points and grid connection usually determines the success of your complete venture to a higher extent than the selection of a particular tools line. The usage of in-house designs of transformer-inverter substations, optimization of DC and AC connection schemes, in addition to well-thought-out logistics of deliveries make it doable not solely to fulfill tight deadlines, but additionally to acquire extra financial results within the type of an elevated tariff charge or diminished capital expenditures.
Of explicit significance is the creation of sustainable fashions of interplay with grid firms. The substation reconstruction initiatives Vysokivska and Beryslavska present that lively participation of the celebration concerned about connecting a PV plant within the design, tools provide and building of substations can considerably speed up the modernization of grid infrastructure with out lowering the reliability of energy provide to customers.
The expertise of ground-mounted and solar energy stations for personal wants crops carried out on former industrial, agricultural and municipal websites confirms that such territories needs to be considered not as an issue, however as a useful resource. Given a transparent engineering idea and well-established venture administration, even a landfill, an deserted plant or an industrial yard overloaded with utilities might be reworked right into a sustainable supply of unpolluted power and long-term revenue.
The usage of degraded and technogenically disturbed areas for services that generate photo voltaic power is per international tendencies in sustainable growth and helps cut back land-use conflicts with the agricultural and residential sectors. The Ukrainian feed-in tariff mannequin has created the required financial incentives for bringing such websites into use, whereas advances in pile construction applied sciences, cable merchandise and inverter tools make sure the technical feasibility of initiatives on advanced soils and in situations of excessive density of utilities.
Evaluation of the carried out instances Tavanska 1, Asteria, Blahovishchenska, Zlatopilska and quite a few solar energy stations for personal wants solar energy crops confirmed {that a} mixture of in-depth engineering and geological research, using specialised equipment, modern strategies for laying cable strains, and proprietary designs of transformer-inverter substations makes it doable to efficiently implement initiatives on former landfills, industrial yards, plant websites and areas with a excessive density of networks. On the identical time, the duties of land reclamation, modernization of grid infrastructure and discount of power consumption from public grids by hundreds of megawatt-hours per 12 months are being addressed.
The developed set of options might be scaled to different areas and international locations with comparable situations. The important thing success components are early planning of grid connection schemes, lively interplay with grid firms, the investor’s willingness to take part in substation reconstruction, and strict management of building schedules. The transformation of advanced websites into photo voltaic technology services needs to be thought of an essential device for the post-industrial transformation of territories and for enhancing the power resilience of business and municipal infrastructure.
Thus, the purpose of the article – to reveal the sensible feasibility and effectiveness of rehabilitating advanced and degraded areas for solar energy crops (SPPs) – has been achieved. The expertise introduced can function a reference for builders, engineering firms and industrial customers contemplating the implementation of photo voltaic technology initiatives beneath situations of restricted land and infrastructure sources.
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