Views: 665 Author: Site Editor Publish Time: 2019-11-29 Origin: Site
Conclusion： SG max=6074.169KVA=4860KW, that means it requires the generator set capacity reaches or exceeds 4860KW,
and so the voltage drop will be 22.68%. So 2*2750KVA/2200KW (4400KW) can’t drive 130MLD pumps.
Specification
1. Driven: 130MLD ONE SET booster pump &basic load of the station.
Booster pump power: 2850KW, voltage &frequency: 6.6KV&50HZ,
Start motor current = 2.5 times higher
Block Load = Transformer load (no.6, 3 & 4)
= 300kVA + 500kVA + 500kVA
= 1300kVA
2. Herein considering drive the pump first and then basic load, all the loads will be started by sequentially,
the basic load is not considered for the capacity requires here. Please check Form1.2.3.4
Generator Capacity Calculation & selected model notes.
This Calculation is made by Hiersun Group( Engineering dept.) by theory only.
1) Weather it can drive the motor also depended by the motor’s efficiency, power factor, heat lost, allowable voltage drop, starting current time, start times, starting process and so on. So for sizing up the diesel generator capacity requires the motor manufacturer and projector to work together. Also different starting mode will impact the result. For example the frequency conversion, the equipment will has nonlinear harmonics surge. So when a variable-frequency drive connected, we advise the 2 times current base on the rated capacity. The above calculation mode is the experienced method for sizing up a diesel generator capacity.
2) When motor starting, the bus voltage drop is related to the motor’s max power, we need to calculate he voltage drop for controlling the power system voltage drop when starting.
3) This calculation counts the single load starting capacity only, but actually if the interval between each load is too short, they impact each other.
4) Diesel generator operation is advised under about 80% power output based on the prime nominal power to keep a well running situation.
Emergency Load List | ||||||||||||
NO.1 | Name |
|
| Rated |
| Demand | Power Factor cosΦ | tgΦ | Pjs | Qjs | Sjs | Starting Order |
1 | For booster Pump | Continuous | 6 | 2850 | 0.92 | 1 | 0.85 | 0.619744 | 3097.826 | 1919.86 | 3644.501 | 1 |
2 | For High-Pressure Fuel Pump | Continuous | 0.38 | 1040 | 0.8 | 1 | 0.8 | 0.75 | 1300 | 975 | 1625 | 2 |
Load Specification | |||||||||||||
Rated Capacity | VOL.Ve(kV) | Efficient η | Power Factor cosΦ | Starting Power factor cosΦq | Starting Current timesβ | Starting current factor Ki | Demand Factor Kd | Active Power P(kW) | Reactive Power Q(kvar) | Apparent | Start Active Power Pq(kW) | Start Reactive | Start |
2850 | 6 | 0.92 | 0.85 | 0.4 | 2.5 | 1 | 1 | 3097.826087 | 1919.8602 | 3644.501279 | 3644.501 | 8350.601 | 9111.253 |
1040 | 0.4 | 0.8 | 0.8 | 0.4 | 1 | 1 | 1 | 1300 | 975 | 1625 | 650 | 1489.337 | 1625 |
FORM1&FORM2
DIESEL GENERATRO PARAMETER | ||||||||
TYPE | Mode | Rated Capacity | Voltage | Power Factor | x'd | xd | x"d | Summited Voltage |
SG(KVA) | V(kV) | cosQG | ΔV(%) | |||||
Emergency | 6000 | 0.8 | 0.25 | 2.39 | 0.15 | 0.25 | ||
FORM3
NO | Starting order | S1 | S2 | S3 | S4 | Smax | ΔV |
1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
2 | 1 | 3644.501279 | 6074.168798 | 5466.751918 | 4141.479 | 6074.169 | 0.232957332 |
3 | 2 | 5265.082121 | 3377.627469 | 975 | 4258.893 | 5265.082 | 0.051383399 |
4 | 3 | 5265.082121 | 3510.054748 | 0 | 4997.53 | 5265.082 | #DIV/0! |
5 | 4 | 5265.082121 | 3510.054748 | 0 | 4997.53 | 5265.082 | #DIV/0! |
FORM4 ( Contact us for more information)
