Clean, Balanced Power for Distribution & Rural Grids
District substations and rural / farm grids mix low power factor, EV-charging and LED harmonics, and three-phase imbalance - while rooftop PV pushes feeders into over-voltage and long rural lines sag at the far end. GEYA ASVG / AVC deliver localized voltage support and load balancing per transformer area - indoor or outdoor (IP66 natural-cooling).
Power Quality in the Transformer Area
A distribution or rural / farm grid stresses the supply in three specific ways. We measure each before recommending hardware.
Low PF & Imbalance Across Mixed Loads
Uneven single-phase loading and a mix of residential and industrial users drag power factor down and overload the neutral conductor.
Fix · ASVGRising Harmonics from EV & LEDs
EV chargers, LED lighting and small drives inject harmonics that distort the feeder waveform and heat the distribution transformer.
Fix · AHF / ASVGVoltage Deviation & Over-Voltage
Long rural / farm feeders cause low end-point voltage, while heavy rooftop PV pushes the line into over-voltage - both trip equipment and inverters.
Fix · AVC / TPQR
Localized Support, Per Transformer Area
A distribution area mixes everything at once. A compact GY-ASVG corrects reactive, harmonic and imbalance in one cabinet at the substation, while a GY-AVC / TPQR regulates feeder voltage back to 230 V and rebalances phases - keeping residential and industrial users compliant. The low-profile GY-ASVG-IU (1U) and low-noise GY-ASVG-LN suit tight substation rooms, and the GY-ASVG-IP66 natural-cooling build mounts outdoors on rural and farm grids - poles, pad-mount kiosks or container substations.
- GY-ASVG: reactive ≥99%, harmonic ≥95%, imbalance ≤5%
- GY-AVC / TPQR regulates over-voltage feeders back to 230 V
- GY-ASVG-IU (1U) / GY-ASVG-LN (45 dB) for tight substation rooms
- High-side sampling / low-side compensation for 10kV metering
- GY-ASVG-IP66 natural-cooling for outdoor rural & farm grids
- Restores the rural assessment band: 220 V +7/−10%, unbalance ≤2%, THD ≤5%
What We Deploy in a Distribution Area
A quick map from each transformer-area problem to the GEYA product that solves it.
| Power Quality Problem | Recommended Product | Voltage Range | Key Spec |
|---|---|---|---|
| Low PF + imbalance (mixed loads) | ASVG · GY-ASVG | 220V – 800V | All-in-one cabinet |
| EV / LED harmonics | AHF · GY-AHF Series | 220V – 800V | 2nd–50th, ≥95% |
| Feeder over-voltage / unbalance | AVC · GY-AVC (TPQR) | 220/380V, 30–400kVA | ±20%, stepless |
| Compact / quiet substation room | ASVG · GY-ASVG-IU ASVG · GY-ASVG-LN | 220/380V | 1U / 45 dB |
| Outdoor rural / farm grid (pole & pad-mount) | ASVG · GY-ASVG-IP66 | 220/380V | IP66, natural-cooling |
| Dynamic capacity, PV absorption & backup | GESS · Grid-forming storage | Per transformer area | Off-grid backup · ≤100 ms |
DSP digital control (SVG: TI TMS320F28335; AHF / ASVG: TI TMS320F28377), 50/60 Hz, single- or three-phase (3-/4-wire), parallel-capable, two- & three-level. Device voltage 220–800 V; 10/35 kV via high-side sampling. Module ratings: SVG 5–150 kvar, ASVG 3–150 kvar, AHF 15–200 A, AVC 30–400 kVA.
Distribution Projects
Real GEYA deployments in rural and district distribution areas, with measured before/after results.
TPQR for an Over-Voltage Rural PV Feeder
In a distribution area in East China, large-scale PV integration caused over-voltage and three-phase imbalance, tripping inverters. A TPQR regulated voltage back to 230 V and rebalanced the phases.
TPQR for a Fish-Farm Feeder’s Night-Time Low Voltage
On a 1.2 km aquaculture feeder, pond aerators starting before dawn dragged phase voltage below 170 V (measured 166–178 V). A pole-mounted TPQR at the load center lifted all three phases above 210 V - stable power for every pond.
50 kW Line-End Conditioner for a 315 kVA PV Feeder
On a 315 kVA transformer area with a supply radius over 500 m, feeder-end voltage passed 303 V and PV inverters disconnected en masse. A 50 kW power-quality conditioner at the line end restored compliant voltage and phase balance.
Distribution - Common Questions
Engineer-to-engineer answers to help you spec the right device for a transformer area.
What fixes over-voltage and imbalance in a distribution area?
A TPQR / GY-AVC regulates feeder voltage and rebalances phases. In an East China distribution area, large-scale PV caused over-voltage and imbalance that tripped inverters; a TPQR brought voltage back to 230 V and met the compliance standard. On long feeders the same unit lifts sagging end-point voltage back into band. Being parallel-connected, it mounts on a pole or pad without interrupting supply - at a fraction of the cost of a new feeder or transformer upgrade - and in one public-transformer area rebalanced phase currents of 149.5 / 13.1 A to roughly 70 A per phase.
EV charging is raising harmonics on my feeder - what helps?
A GY-AHF active harmonic filter cancels the 2nd-50th harmonics injected by EV chargers and LEDs. Where low power factor and three-phase imbalance also appear, an all-in-one GY-ASVG handles harmonics, reactive power and imbalance together in one substation cabinet.
My substation room is tight - is there a compact unit?
Yes. The GY-ASVG-IU uses a 1U-thin form factor for rack mounting, and the low-noise GY-ASVG-LN runs at just 45 dB with a built-in grid-side sampling CT - both ideal for cramped or noise-sensitive distribution rooms.
Explore Other Industries
Different load, different fix. See how GEYA solves power quality across sectors.
Managing a Distribution Network?
Send us your feeder data and load profile - our engineers will model your transformer area and recommend the right ASVG, AHF or AVC solution.
