Rymel Transformers For Solar Generation
The generation of energy through renewable sources has been consolidating in the world. Rymel, aware of new technologies and committed to caring for the environment, has developed special transformers, designed to work with inverters in solar applications.
This kind of equipment are used to adjust the voltage produced by the inverters in a photovoltaic system and interconnect it to the electricity supply network, additionally providing galvanic isolation between the electricity grid and the photovoltaic system.
This kind of transformers are designed to withstand the harmonics produced by the inverters, the insulation system of their windings is designed to withstand the high earth voltages produced by electronic circuits, as well as high slopes of voltage (du/dt) from the inverter during operation.
As a special feature, include an electrostatic screen between the windings, which facilitates galvanic isolation and allows capacitively decoupling high frequency pulses from the network, protecting electronic circuits. In addition, this screen serves as an additional du/dt filter and has a design that minimizes losses due to the Eddy effect.
These transformers can also be manufactured with 3 windings, which are used to raise the low voltage and provide galvanic isolation of two inverters independently.
These special transformers are manufactured with electrical steel strip of very low losses, which increases the efficiency of the equipment, minimizes losses and vacuum currents and maintains a very low level of audible noise. Additionally, the transformers are designed to have the appropriate impedances for the coupling with the inverters and have a thermal design that allows working in places with high ambient temperature.
ymel Transformers for solar applications can be insulated in dielectric oil; in this case, they are padmounted type with dead front terminals, which have a sealed cabinet and compartments for both high-voltage and low-voltage terminals. In addition, the pedestal transformer has built-in connection, protection and maneuver elements (typical of a substation), which protect the equipment.
On the other hand, also transformers with dry type insulation can be manufactured; in this case, they can be low voltage/low voltage transformers or medium voltage transformers, these last ones have their windings encapsulated in epoxy resin under vacuum that guarantees a minimum level of partial discharges. This type of transformer uses fire-resistant and self-extinguishing materials, which makes them very safe and maintenance-free. As this transformer does not use dielectric oil, facilitates its installation indoors, allowing space optimization.