Reactive Power Management through TG Sets.
Improve grid Power Factor to near unity by using the capability curve of your existing Synchronous Generator — no expensive passive capacitor banks required. The result: lower KVAH bills, stable voltage profile, and safer islanding.
KVAH billing punishes poor power factor.
Modern utilities bill on KVAH, not KWh. Every KVAR your plant draws from the grid inflates the bill and destabilises the voltage profile. Capacitor banks were the legacy fix — but they're expensive, hard to tune, and can't respond to load swings the way a synchronous machine can.
- Reactive power drawn from grid → higher KVAH → higher bill
- Passive capacitor banks are capital-intensive and static
- Voltage sags during load transients and island events
- No real-time visibility into plant reactive-power flow
Illustrative saving at ₹6.0/KVAH tariff
| KVAH | PF | Bill (₹) | Saving (₹) |
|---|---|---|---|
| 44,06,859 | 0.865 | 3,08,27,945 | — current |
| 41,48,643 | 0.960 | 28,72,000+ | 23.8 L / month |
| 48,85,559 | 0.970 | 3,38,20,383 | 27.0 L / month |
Figures illustrative of a live customer site. Actual payback modelled from your KVAH/PF data.
Use the Synchronous Generator you already own.
Every synchronous generator has a capability curve — a P–Q operating envelope defined by stator, rotor and stability limits. Within this envelope, the TG can be operated over-excited to supply reactive power to the plant, and even to the grid. Powervision engineers a closed-loop control layer around the AVR/exciter to hold Grid PF at unity across load swings.
P–Q envelope characterised per TG set (e.g. 15 MW @ 0.8 lag → 11,250 KVAR available).
Closed-loop KVAR command to AVR, with min/max KVAR limits, pulse-delay and pulse-width tuning per machine.
TG-1, TG-2, TG-3 share reactive load proportionally — prevents hunting and tripping during island events.
Grid KVAR held within a narrow band (e.g. −2500 to −100 KVAR) to lock PF at 1.000.
TG voltage-low, KVAR-high and Grid min-amp interlocks with annunciator + alarm history.
Auto-generated KWh, KVAH, KVAR and PF logs per TG, per grid feeder, per transformer.
From sensing to closed-loop control.
Grid, TG and transformer parameters (KW, KVAR, KVA, PF, V, I, Hz) sampled at high rate.
PLC compares Grid PF vs setpoint and computes ΔKVAR to be sourced/absorbed by each TG.
INC/DEC pulses to AVR raise/lower field current within configured KVAR min-max range.
SCADA HMI logs commands, alarms and trends — visible from control room and remotely.
Aarti Steel, Cuttack — Grid PF 1.000
Real values captured from the Aarti Auto Reactive Control System — two TG sets sharing reactive load while the grid draws zero net KVAR.
Direct monetary + operational gains.
KVAH → KW as PF approaches unity. Direct savings on the utility bill from month one.
Eliminates capital cost, harmonic risk and maintenance of large passive HT capacitor banks.
Multiple TG sets coordinate reactive sharing — prevents unwanted tripping during island operation.
Per-feeder, per-TG, per-transformer monitoring with daily/weekly PF reports.
Innovate new ideas and execute them in the field of engineering — cost saving with low investment to achieve high return on investment. Founded 1996, serving Steel, Cement, Power and Paper industries.
Send us your KVAH bill — get a payback report.
Proposal with capability-curve analysis and ROI within 48 hours.