13.8kV On-Load Tap Changing Voltage Regulator for Solar & Wind Farms
13.8kV Single-Phase Automatic Step Voltage Regulator with 32 tap positions, ±10% regulation range, and programmable digital controller. Suitable for pole-mounted, pad-mounted, or substation installation in industrial and mining applications. Features automatic on-load voltage regulation and supports 50/60Hz operation.
Single Phase Automatic Voltage Regulator AVR
,Step Voltage Regulator 13.8KV
,Distribution Voltage Regulator with AVR
Stable Voltage Control for Modern Distribution Networks
The HENTG POWER 13.8 kV single-phase automatic line voltage regulator maintains steady distribution voltage under dynamic load and variable power flow conditions. Optimized for utility feeders, renewable energy networks, industrial power systems and rural distribution lines, this on-load voltage regulator delivers precise, uninterrupted voltage stabilization for solar, wind and grid modernization projects.
Built with an on-load tap-changing autotransformer design, the unit automatically raises or lowers output voltage without cutting off power supply. Standard configuration supports a ±10% regulation range split into 32 steps, delivering approximately 0.625% fine voltage adjustment per step. HENTG POWER offers full turnkey support including equipment selection, control customization, installation design, factory testing and complete technical documentation for utilities, EPC contractors, renewable developers and industrial end users.
The regulator continuously monitors feeder voltage and triggers tap adjustment once readings go outside the preset control bandwidth. Voltage correction operates with no feeder interruption, avoiding downtime for downstream loads.
±10% regulation range with 32 tap steps, ~0.625% adjustment per step. Fine granularity stabilizes voltage quality and reduces frequent tap operations to extend service life.
Fully configurable for actual grid conditions: target voltage, bandwidth, time delay, line-drop compensation, forward/reverse power flow, tap limits, alarm rules and data monitoring.
Engineered for feeders connected to solar PV, wind turbines and BESS. Handles reverse power flow, daytime voltage rise and fluctuating generation-load balance.
Internal potential winding taps plus optional external ratio-correction transformers allow adaptation to multiple system voltages within the approved design scope.
Tap counter, voltage & load logging, fault alarms, remote status feedback. Supports distribution automation and SCADA integration per customer protocol requirements.
| Parameter | Available Configuration |
|---|---|
| Product type | Single-phase automatic step voltage regulator |
| Rated system voltage | 2.5–33 kV |
| Typical rated voltage | 13.8 kV |
| Frequency | 50 Hz or 60 Hz |
| Rated current | 50–1,665 A |
| Rated capacity | 33–1,000 kVA |
| Regulation range | Typically ±10% |
| Number of regulation steps | 32 steps |
| Voltage adjustment per step | Approximately 0.625% |
| Insulation level / BIL | 60–200 kV, depends on voltage class |
| Tap-changing method | Automatic on-load tap changing |
| Control system | Programmable digital controller |
| Installation options | Pole-mounted, pad-mounted, substation-type |
| Power-flow mode | Forward or bidirectional configuration |
| Monitoring and communication | Configurable per project requirements |
Final ratings, insulation levels, control functions and dimensions are finalized against approved project specs. Not all rating combinations are available.
Challenge: Long overhead feeders, variable loads and line impedance create undervoltage or unstable voltage at remote nodes, harming motors, pumps, industrial equipment and residential loads.
HENTG POWER Solution: On-load tap adjustment stabilizes feeder voltage. Built-in line-drop compensation optimizes voltage regulation at the far end of long lines.
Challenge: Solar, wind and BESS introduce reverse power flow and voltage rise, creating large voltage swings between high-generation and low-load periods.
HENTG POWER Solution: Custom control logic and forward/reverse operating modes are configured based on feeder load curves, supporting reliable voltage regulation for renewable-heavy distribution grids.
Challenge: Mismatched regulator ratings or improper control settings lead to insufficient correction, excessive tap cycling, accelerated wear and unnecessary project cost.
HENTG POWER Solution: Pre-design system study covers voltage level, peak load, voltage drop, short-circuit capacity, insulation, power flow, environment and future expansion to select correct capacity, BIL and control settings.
- Utility distribution feeders
- Rural and remote power networks
- Solar and wind farm distribution systems
- BESS and distributed energy resource projects
- Industrial plants and mining facilities
- Pumping and irrigation stations
- Distribution substations
- Long-distance overhead feeder networks
- Systems with frequent load variation
- Grid modernization and power quality upgrade projects
Ideal for overhead distribution feeders. Compact footprint, simple line integration and minimal ground occupation.
Ground-mounted design for urban districts, industrial zones, renewable plants and underground distribution systems. Enclosure protection and cable interfaces customized to site layout.
Designed for utility and industrial substations, easy integration with switchgear, protection relays and SCADA control systems.
- Nominal system voltage and maximum operating voltage
- Frequency and phase configuration
- Maximum continuous load current
- Required voltage regulation range
- Feeder length and conductor details
- Sending-end and receiving-end voltage profile
- Load power factor & daily load curve
- System short-circuit level
- Insulation class and BIL requirement
- Forward or bidirectional power flow
- Installation type and space constraints
- Ambient temperature, altitude, humidity and pollution class
- Communication protocol and SCADA interface needs
- Applicable industry standard or project specification
HENTG POWER delivers far more than hardware for automatic voltage regulation. Our in-house engineering team provides system condition analysis, custom sizing, controller programming, manufacturing, third-party testing, technical documentation and end-to-end project coordination for EPC and utility clients.
- Project-specific electrical & mechanical design
- Full compatibility with feeder and substation operating conditions
- Configurable digital voltage control platform
- Specialized for renewable energy and bidirectional power flow scenarios
- Environment-adapted insulation and mechanical design
- Strict factory acceptance testing and complete documentation
- Long-term operational stability and maintainability
Share your feeder parameters, load profile, voltage stabilization targets, installation conditions and communication requirements with our engineers. We will recommend the optimal regulator rating, control strategy and mounting solution for your project.
Email: info@hentgpower.com
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