1 MW Oilfield Power System Cost Breakdown (Q3 2026 China Supplier Pricing)
1 MW Oilfield Power System Cost Breakdown (Q3 2026 China Supplier Pricing) — itemized bill of materials and FOB pricing for a typical configuration.
Estimated total (FOB): $434,382 · 2000 kVA transformer
Bill of materials
| Item | Specification | Qty | Price (USD) |
|---|---|---|---|
| HV incoming panel (XGN15-12) | 630 A · SF6 · 4-way | 1 | $2,350 |
| Main transformer (S13-M-2000/10) | 2000 kVA · Oil-Immersed · Copper · S13 | 1 | $22,331 |
| LV incoming panel (GGD-3150) | 3150 A busbar · In 2887 A | 1 | $7,225 |
| LV feeder panel (×5) (GGD-3150) | distributes 29 circuits | 5 | $36,126 |
| PFC capacitor bank (500 kVAR) | automatic · GCK LV cabinet | 1 | $5,800 |
| Cable branch box (LV) (DFW-0.4) | 1-in / 4-out · 0.4 kV · 630 A | 7 | $4,410 |
| Series reactor (detuned) (CKSG-30.0/0.4) | 30.0 kVAR · 6% · 0.4 kV | 1 | $143 |
| Busway trunking (LV main feeder) (Busway 4000 A) | 4000 A · Cu/Al busway · 120 m · $1329/m | 1 | $159,480 |
| Feeder cable — Beam pump 1 (×29) (YJV 50 mm²) | 50 mm² Cu · 128 A · ΔU 3.0% · $25.2/m | 29 | $87,696 |
| Branch trunk cable (LV → branch box 1) (YJV 120 mm² ×2) | 2× 120 mm² Cu · 513 A · ΔU 2.5% · $68.8/m | 2 | $16,512 |
| Branch trunk cable (LV → branch box 2) (YJV 120 mm² ×2) | 2× 120 mm² Cu · 513 A · ΔU 2.5% · $68.8/m | 2 | $16,512 |
| Branch trunk cable (LV → branch box 3) (YJV 120 mm² ×2) | 2× 120 mm² Cu · 513 A · ΔU 2.5% · $68.8/m | 2 | $16,512 |
| Branch trunk cable (LV → branch box 4) (YJV 120 mm² ×2) | 2× 120 mm² Cu · 513 A · ΔU 2.5% · $68.8/m | 2 | $16,512 |
| Branch trunk cable (LV → branch box 5) (YJV 120 mm² ×2) | 2× 120 mm² Cu · 513 A · ΔU 2.5% · $68.8/m | 2 | $16,512 |
| Branch trunk cable (LV → branch box 6) (YJV 120 mm² ×2) | 2× 120 mm² Cu · 513 A · ΔU 2.5% · $68.8/m | 2 | $16,512 |
| Branch trunk cable (LV → branch box 7) (YJV 50 mm²) | 50 mm² Cu · 128 A · ΔU 3.0% · $25.2/m | 1 | $3,024 |
| Main busbar (Cu) (Cu 125×10) | 125×10 · 2500 A rating · ref $147.8/m | included | POA |
| Grounding electrode (Φ20mm × 2.5m rod) | R₁ 39.6 Ω → 13 rod(s) ≤ 4 Ω | 13 | $125 |
| Soft starter cabinet (largest motor) (250 kW) | Soft starter (3.0× In) · start dip 2.3% | 1 | $6,600 |
| Injection pump soft starter / protection (250 kW) | high-pressure injection pump · soft-start + overload/underload protection | 4 | POA |
| ESP variable-frequency drive (VFD) (90 kW) | ESP soft-start + speed control · downhole pump protection | 5 | POA |
Single-line diagram
How it was calculated
- Beam pumps: 20 × 37 kW = 740 kW
- Injection pumps: 4 × 250 kW = 1,000 kW
- ESP motors: 5 × 90 kW = 450 kW
- Connected load = 2,190 kW → demand P = 2,190 × 0.75 = 1,643 kW
- Largest motor start (motor-starting): Sstart = 250 ÷ (0.9×0.85) × 3.0 = 980 kVA → dip = 2.3% vs limit 15%
- Loads: P=2,190 kW, PF 0.85, 29 circuits
- Demand: 2,190 × 0.75 = 1,643 kW
- PFC: Qc = 1,643 × (0.620 − 0.329) = 478 kVAR → 500 kVAR bank
- Transformer: S = 1,643 ÷ 0.95 = 1728.9 kVA → 2,000 kVA standard
- Loading: 1,729 ÷ 2,000 = 86% (good range)
- Voltage regulation: 86% × 4% × sinφ ≈ 1.1% at full load
- HV: In 115.5 A, Isc 14.4 kA → XGN15-12
What drives the cost
- Equipment — the transformer/switchgear/inverter is the largest single line item.
- Storage (where applicable) — batteries are the biggest swing factor.
- Copper & freight — copper-linked cabling and freight shift landed cost ±5–10%.
Frequently asked questions
What voltage do oilfield beam-pump motors run at?
Beam-pump (pumping unit) motors are typically 0.4 kV for units under 45 kW and 0.66 kV or 1.14 kV for larger units to cut cable losses across widely dispersed wells. A 37 kW unit uses 0.4 kV; wells spread over 1-2 km favour a 10/0.66 kV or 10/1.14 kV distribution with a pad-mounted substation per cluster.
Why do oilfield motors need soft-start?
Direct-on-line starting draws 5-7 times rated current and can dip the weak, long feeder voltage below 85%, stalling adjacent pumps. Soft starters limit starting current to 2.5-3.5 times and ramp torque over 10-30 seconds. This matters on off-grid or long radial oilfield feeders; the calculator checks motor-starting voltage dip and recommends soft-start or VFD.
What is an ESP and how is it powered?
An electrical submersible pump (ESP) is a downhole centrifugal pump driven by a submersible motor, fed from a step-up transformer and VFD at surface. A typical 90 kW ESP runs on a dedicated 10/0.66-3.3 kV feed through a variable-speed drive that matches pump speed to well inflow. ESPs are sensitive to voltage quality, so harmonic and dip control matter.
When is an off-grid power system right for an oilfield?
Off-grid (diesel or gas generator plus storage) suits remote wells where a grid connection would cost more than roughly $20,000-50,000 per km of line. Typical off-grid oilfield loads are 50-500 kW. Gas-driven generation using associated gas can cut fuel cost 60-80% versus diesel; the calculator prices an off-grid option alongside the grid-fed case.
What demand factor applies to a multi-well oilfield?
A multi-well oilfield with 20 pumping units rarely runs all motors simultaneously at full load; a demand factor of 0.7-0.8 is typical. Injection and ESP loads are more continuous, running 0.8-0.9. The calculator uses 0.75 by default and lets you adjust per site, preventing a 25-35% transformer oversize.
What standards govern oilfield box substations?
Pad-mounted and box-type substations for oilfields follow GB/T 17467 (prefabricated substations) and IEC 62271-202 (high-voltage/low-voltage prefabricated substations), with explosion-proof or weatherproof enclosures per the hazardous-area classification. Transformers follow IEC 60076; the calculator's BOM cites the applicable standard basis for each selected item.
Size your own configuration
Run the calculator for your exact load and get a full BOM + FOB price.
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