Offer
Voltage regulators for MV networks
Alterga has unique and long-standing experience on the Polish market in the delivery and commissioning of voltage regulators. The devices we offer are ideal for Renewable Energy Sources, such as photovoltaic or wind farms. Depending on the characteristics of the power grid, RES generation can have a negative impact on voltage parameters. Our products provide a solution to problems with too high or too low voltages in MV networks.
We offer devices for voltage regulation in medium voltage networks. Voltage regulation is carried out by means of a single-phase autotransformer with on-load tap changer.
Key features of our solution:
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voltage regulation by using a booster winding with on-load tap changer
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installation in an open (2 devices) or closed (3 devices) delta configuration allowing for a regulation range of +/- 10% and 15% of the input voltage, respectively
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bidirectional operation
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voltage regulation at RES generation sources
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no possibility of overcompensation of the network – possibility of voltage regulation at a high power factor cosφ
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no overvoltage and overcurrent phenomena characteristic of capacitors
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possibility of moving voltage regulators to another location or investment for a given group of recipients, e.g. construction of a Grid Connection Point
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attractive cost compared to other investments aimed at improving voltage parameters
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pole-mounted installation inside the network or foundation placement on the premises of the substation
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control and communication connected with the operator’s SCADA
Our comprehensive service, related to voltage regulation in MV networks, includes:
- analytical work, selection of the device and installation site
- design of the optimal solution
- delivery of voltage regulators
- installation on a pole or substation site
- commissioning of the equipment
- 5-year warranty period
- possibility of signing a post-warranty agreement
- operation and periodical inspections
In the area of voltage regulator installation, Alterga already has a number of successful implementations in the distribution system operators’ sector. Our devices also perform very well in the RES sector, where voltage level fluctuations are common.
Medium voltage (MV) regulators
Medium Voltage (MV) regulators are among the most effective and flexible solutions for improving the power quality parameters in electrical distribution networks. They serve as an attractive alternative to costly and time-consuming line infrastructure upgrades. While designed for stationary operation, these regulators can be relocated, making them a strategic investment. In the event of future network expansion – such as the construction of a main supply point – the regulator can be transferred to a new, more strategic location.
What is a voltage regulator?
A medium voltage regulator is a device used in medium-voltage power distribution networks to maintain voltage levels within predefined acceptable limits. It operates by adjusting the voltage using an on-load tap changer (OLTC), modifying the voltage level to match the reference setpoint defined in the controller. This ensures voltage stability across the network and guarantees that power quality parameters comply with relevant standards and regulations.
Alterga has extensive experience in the design, delivery, and commissioning of medium voltage (MV) regulators, having completed projects for major Distribution System Operators in Poland.
Medium voltage regulators and the rise of renewables
The rapid growth of renewable energy sources (RES) – particularly photovoltaic installations – has led to systemic voltage issues in distribution networks. During periods of high solar generation, sustained overvoltage can occur, limiting the ability to connect additional RES units.
Alterga’s medium voltage regulators provide an effective solution to this problem. By actively lowering voltage in the line, the system helps keep values within permissible ranges, thereby increasing hosting capacity and enabling continued development of clean energy sources.
Other types of voltage regulators
Not all voltage regulators serve the same function. Several other types exist for different applications, such as:
- AVR (Automatic Voltage Regulators) – used in generator sets to stabilize output voltage
- MPPT (Maximum Power Point Tracking) regulators – used in photovoltaic systems to optimize energy output from solar panels
These devices differ significantly in design and purpose from medium voltage regulators used in power distribution networks.
Comprehensive Services from Alterga
Alterga offers end-to-end support for voltage regulation in MV networks. Our services include:
- network analysis and professional selection of the optimal installation location
- delivery and complete installation of the medium voltage regulator
- commissioning and configuration of the system
- periodic inspections and both warranty and post-warranty service
By entrusting these tasks to Alterga’s qualified specialists, you gain the assurance of a reliable and efficient voltage regulation system.
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