Chargers
9
حاسبة تصميم محطة شحن السيارات الكهربائية
حدد مقاسات المحول والتوزيع لمحطة شحن السيارات الكهربائية — حمل الطلب، معامل الاستخدام المتزامن، جهد التغذية، وقائمة مواد مرجعية.
للاستشاريين والمركبين الذين يحددون مقاسات الخدمة الكهربائية والمحول لمحطات شحن السيارات الكهربائية AC وDC.
استخدم الحاسبة
مثال محلول
مثال مرجعي محسوب مسبقًا (قابل للزحف — لا يتطلب JavaScript). أدخل معاملاتك الخاصة أعلاه للحصول على نتيجة مباشرة.
مثال محلول — 4×7 kW + 2×22 kW AC + 2×60 kW + 1×120 kW DC
Station demand
250 kW
263 kVA · 312 kW connected · diversity 0.8
Transformer
315 kVA
Feeder
10 kV
Line current
379 A
Load & transformer sizing
| Quantity | Value |
|---|---|
| Connected load | 312 kW (Σ chargers × rated power) |
| Diversity factor | 0.8 (simultaneous-use factor) |
| Demand load | 312 × 0.8 = 250 kW |
| Demand (apparent) | 250 ÷ 0.95 = 263 kVA |
| Required transformer | next standard ≥ 289 kVA → 315 kVA |
| Supply voltage | 10 kV (MV feed) — recommended for this size |
Recommendation
Design note
10 kV MV service with a 315 kVA distribution transformer
DC fast-charging load is peaky — consider a battery energy-storage system for peak shaving (reduce demand charge).
Pricing basis
Charger unit prices are from the ev-charging-stations price reference (FOB Qingdao, medium confidence); exact models are quoted per project.
Bill of materials
| Equipment | Spec | Qty | Subtotal |
|---|---|---|---|
| AC charger (7 kW) | 7 kW · 1-phase/3-phase | 4 | POA |
| AC charger (22 kW) | 22 kW · 3-phase | 2 | POA |
| DC fast charger (60 kW) | 60 kW · CCS/GB-T | 2 | POA |
| DC fast charger (120 kW) | 120 kW · CCS/GB-T | 1 | POA |
| Distribution transformer | 315 kVA · 10 kV / 0.4 kV · S13 | 1 | POA |
| Total equipment (reference) | POA |
مثال محلول — مركز شحن سريع DC بقدرة 4×120 kW
Station demand
432 kW
455 kVA · 480 kW connected · diversity 0.9
Chargers
4
Transformer
630 kVA
Feeder
10 kV
Line current
26 A
Load & transformer sizing
| Quantity | Value |
|---|---|
| Connected load | 480 kW (Σ chargers × rated power) |
| Diversity factor | 0.9 (simultaneous-use factor) |
| Demand load | 480 × 0.9 = 432 kW |
| Demand (apparent) | 432 ÷ 0.95 = 455 kVA |
| Required transformer | next standard ≥ 500 kVA → 630 kVA |
| Supply voltage | 10 kV (MV feed) — recommended for this size |
Recommendation
Design note
10 kV MV service with a 630 kVA distribution transformer
DC fast-charging load is peaky — consider a battery energy-storage system for peak shaving (reduce demand charge).
Pricing basis
Charger unit prices are from the ev-charging-stations price reference (FOB Qingdao, medium confidence); exact models are quoted per project.
Bill of materials
| Equipment | Spec | Qty | Subtotal |
|---|---|---|---|
| DC fast charger (120 kW) | 120 kW · CCS/GB-T | 4 | POA |
| Distribution transformer | 630 kVA · 10 kV / 0.4 kV · S13 | 1 | POA |
| Total equipment (reference) | POA |
كيف تم الحساب
- · الحمل المتصل: Σ (عدد الشواحن × القدرة المقدرة).
- · حمل الطلب: Pdemand = Pconnected × معامل التنوع.
- · kVA الطلب: S = Pdemand ÷ معامل القدرة.
- · المحول: أقرب kVA قياسي ≥ S × 1.1 (هامش التصميم).
- · تيار الخط: I = S ÷ (√3 · U).
المعايير المرجعية
| Standard | Scope |
|---|---|
| IEC 61851 | نظام الشحن التوصيلي للمركبات الكهربائية |
| GB/T 51313 | المعيار الفني لمرافق الشحن الموزعة للمركبات الكهربائية |
| GB/T 18487 | نظام الشحن التوصيلي للمركبات الكهربائية (الصين) |
الأسئلة الشائعة
How do I size the transformer for an EV charging station?
Sum the charger ratings with a coincidence factor: AC Level 2 chargers are 7-22 kW each, DC fast chargers 60-360 kW. A 10-charger DC station can peak near 500-1200 kVA. Size the Transformer to the coincident peak plus margin, per IEC 61851 and GB/T 51313. The calculator computes demand and transformer kVA.
What is the difference between AC and DC EV charging?
AC charging (Level 2, 7-22 kW) uses the vehicle's onboard charger and takes hours; DC fast charging (60-360 kW) bypasses it and charges to 80% in 20-40 minutes. DC stations need much larger electrical supply and cooling. The calculator models both and sizes supply accordingly.
What is the typical demand factor for an EV charging station?
EV charging is time-correlated, so the demand factor is higher than other loads — 0.7-1.0 for a busy DC fast-charging hub. A fleet depot charging overnight runs 0.8-1.0 simultaneously. The calculator applies a coincidence factor to avoid undersizing the supply.
What supply voltage does a DC fast charging station need?
A small station (a few 60-120 kW chargers) runs on 0.4 kV; a larger hub (500 kW-1.5 MW) needs a 10 kV feed and a dedicated transformer, per GB/T 51313. The calculator selects the supply voltage and transformer from the aggregated charger load.
What charging standard should the station support?
Global standards: CCS (Combined Charging System) and CHAdeMO for DC, GB/T 20234 for China, and Type 2 for AC. A station serving mixed fleets usually offers CCS2 DC plus Type 2 AC. The calculator's design basis assumes IEC 61851-compliant chargers.
تضمين هذه الحاسبة
أضف هذه الحاسبة إلى موقعك الإلكتروني مجانًا. يتكيف إطار iframe مع أي عرض ويعمل بالكامل في متصفح الزائر.
أدوات ذات صلة
Selectionحاسبة الحمل والطلبSelectionحاسبة اختيار المحولDesignمُهيئ PV + تخزين + شحن EVEconomicsحاسبة تكلفة الكهرباء
تقديرات مرجعية (FOB تشينغداو، EXW) للتصميم الأولي فقط — وليست عرض سعر نهائي. أكد المقاسات وفقًا لمشروعك والمعايير المحلية.
Send my complete design report
Get the full bill of materials, single-line diagram, calculation steps and FOB pricing as a PDF — free, no sign-up.
Your data stays private. No spam — only a reply to your enquiry.