◈. Power-factor trend in capacitor input capacity by load change?
1. Electric power conditions
| P L C Name | Area | Apparent Power | Current | Power-factor before improvement (cosΘ₁) | Power-factor after improvement (cosΘ₂) | |||||||||||||||||||
| CM234 | Tub Return | 41.58 kVA | 63.17 A | 0.7 | 0.9 | |||||||||||||||||||
| CM201 | Check-in | 93.01 kVA | 141.31 A | 0.7 | 0.9 | |||||||||||||||||||
| CM202 | Check-in | 166.44 kVA | 252.87 | 0.7 | 0.9 | |||||||||||||||||||
| CM208 | ICS Backbone upper loop | 147.70 kVA | 224,40 | 0.6 | 0.9 | |||||||||||||||||||
2. Capacitor capacity computation
| P L C Name | Active Power | Calculated capacitor capacity |
Installation required capacitor capacity | Capacitor capacity at %L=13% installation | Operation (working) capacitor capacity | |||||||||||||||||||
| CM234 | 29.10 kW | 15.58 kvar | 25 kvar | 40 kvar (10 x 4Step) | 34.78 kvar (8,69 x 4Step) | |||||||||||||||||||
| CM201 | 65.10 kW | 34.86 kvar | 50 kvar | 60 kvar (15 x 4Step) | 52.17 kvar (13.04 x 4Step) | |||||||||||||||||||
| CM202 | 116.50 kW | 62.39 kvar | 75 kvar | 100 kvar (25 x 4Step) | 87.03 kvar (21.75 x 4Step) | |||||||||||||||||||
| CM208 | 88.62 kW | 75.22 kvar | 100 kvar | 120 kvar (30 x 4Step) | 104.34 kvar (26.08 x 4Step) | |||||||||||||||||||
◊. P L C Name CM234 ; Power-factor in capacitor input by load change
| No. | Load factor % | Load capacity kW | Power-factor by capacitor input step | System compostion (based on operation capacity) | Remarks | |||||||||||||||||||
| 4 Step | 3 Step | 2 Step | 1 Step | |||||||||||||||||||||
| 34.78 kvar | 26.07 kvar | 17.38 kvar | 8.69 kvar | |||||||||||||||||||||
| #1. | 100% | 29.10 kW | (+)98.50% | 99.23% | 92.10% | Number of Steps 4 X 8.69 kvar Step function ratio 1:1:1:1 |
(+)Leading, lagging
Power-factor before improvement is computed with an premise of being steady at 70% regardless of load change. (that is, power-factor before improvement is equal to 70% in 100% of load factor or 30% of load factor at all times) |
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| #2. | 90% | 26.19 kW | (+)95.57% | 99.96% | 94.19% | |||||||||||||||||||
| #3. | 80% | 23.28 kW | (+)99.50% | 96.45% | 83.96% | |||||||||||||||||||
| #4. | 70% | 20.37 kW | (+)96.79% | 98.63% | 85.99% | |||||||||||||||||||
| #5. | 60% | 17.46 kW | (+)90.40% | 99.96% | 88.63% | |||||||||||||||||||
| #6. | 50% | 14.55 kW | (+)98.51% | 92.10% | ||||||||||||||||||||
| #7. | 40% | 11.64 kW | (+)90.40% | 96.45% | ||||||||||||||||||||
| #8. | 30% | 8.73 kW | (+)71.75% | 99.96% | ||||||||||||||||||||
◊. The power-factor computation if 2 step of capacitor with 17.38kvar is put when using 20.37kW of load with 70% of load factor
◊. P L C Name CM201 ; Power-factor in capacitor input by load change
| No. | Load factor % | Load capacity kW | Power-factor by capacitor input step | System compostion (based on operation capacity) | Remarks | |||||||||||||||||||
| 4 Step | 3 Step | 2 Step | 1 Step | |||||||||||||||||||||
| 52.17 kvar | 39.12 kvar | 26.08 kvar | 13.04 kvar | |||||||||||||||||||||
| #1. | 100% | 65.10 kW | 97.68% | 92.22% | Number of Steps 4 X 13.04 kvar Step function ratio 1:1:1:1 |
(+)Leading, lagging
Power-factor before improvement is computed with an premise of being steady at 70% regardless of load change. (that is, power-factor before improvement is equal to 70% in 100% of load factor or 30% of load factor at all times) |
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| #2. | 90% | 58.59 kW | 99.16% | 94.31% | 86.68% | |||||||||||||||||||
| #3. | 80% | 52.08 kW | 99.98% | 96.56% | 88.74% | |||||||||||||||||||
| #4. | 70% | 45.57 kW | (+)99.23% | 98.71% | 91.26% | |||||||||||||||||||
| #5. | 60% | 39.06 kW | (+)95.36% | 99.98% | 94.31% | 82.44% | ||||||||||||||||||
| #6. | 50% | 32.55 kW | (+)98,39% | 97.68% | 85.00% | |||||||||||||||||||
| #7. | 40% | 26.04 kW | (+)90.07% | 99.98% | 88.74% | |||||||||||||||||||
| #8. | 30% | 19.53 kW | (+)95.37% | 94.31% | ||||||||||||||||||||
◊. The power-factor computation if 4 step of capacitor with 52.17kvar is put when using 65.10kW of load with 100% of load factor
◊. P L C Name CM202 ; Power-factor in capacitor input by load change
| No. | Load factor % | Load capacity kW | Power-factor by capacitor input step | System compostion (based on operation capacity) | Remarks | |||||||||||||||||||
| 4 Step | 3 Step | 2 Step | 1 Step | |||||||||||||||||||||
| 87.03 kvar | 65.25 kvar | 43.50 kvar | 21.75 kvar | |||||||||||||||||||||
| #1. | 100% | 116.50 kW | 96.46% | 90.84% | Number of Steps 4 X 21.75 kvar Step function ratio 1:1:1:1 |
(+)Leading, lagging
Power-factor before improvement is computed with an premise of being steady at 70% regardless of load change. (that is, power-factor before improvement is equal to 70% in 100% of load factor or 30% of load factor at all times) |
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| #2. | 90% | 104.85 kW | 98.23% | 92.91% | 85.54% | |||||||||||||||||||
| #3. | 80% | 93.20 kW | 99.62% | 95.23% | 87.49% | |||||||||||||||||||
| #4. | 70% | 81.55 kW | (+)99.88% | 97.66% | 89.91% | |||||||||||||||||||
| #5. | 60% | 69.90 kW | (+)97.56% | 99.62% | 92.91% | 81.57% | ||||||||||||||||||
| #6. | 50% | 58.25 kW | (+)99.50% | 96.45% | 83.96% | |||||||||||||||||||
| #7. | 40% | 46.60 kW | (+)93.47% | 99.62% | 87.49% | |||||||||||||||||||
| #8. | 30% | 34.95 kW | (+)97.57% | 92.91% | ||||||||||||||||||||
◊. The power-factor computation if 3 step of capacitor with 65.25kvar is put when using 104.85kW of load with 90% of load factor
◊. P L C Name CM208 ; Power-factor in capacitor input by load change
| No. | Load factor % | Load capacity kW | Power-factor by capacitor input step | System compostion (based on operation capacity) | Remarks | |||||||||||||||||||
| 4 Step | 3 Step | 2 Step | 1 Step | |||||||||||||||||||||
| 104.34 kvar | 78.24 kvar | 52.16 kvar | 26.08 kvar | |||||||||||||||||||||
| #1. | 100% | 88.62 kW | 98.80% | 91.17% | Number of Steps 4 X 26.08 kvar Step function ratio 1:1:1:1 |
(+)Leading, lagging
Power-factor before improvement is computed with an premise of being steady at 60% regardless of load change. (that is, power-factor before improvement is equal to 60% in 100% of load factor or 30% of load factor at all times) |
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| #2. | 90% | 79.76 kW | 99.96% | 94.24% | 82.71% | |||||||||||||||||||
| #3. | 80% | 70.89 kW | (+)99.05% | 97.46% | 85.84% | |||||||||||||||||||
| #4. | 70% | 62.03 kW | (+)94.42% | 99.74% | 89.71% | |||||||||||||||||||
| #5. | 60% | 53.17 kW | (+)99.05% | 94.31% | 76.46% | |||||||||||||||||||
| #6. | 50% | 44.31 kW | (+)91.78% | 98.80% | 80.20% | |||||||||||||||||||
| #7. | 40% | 35.44 kW | (+)99.05% | 85.84% | ||||||||||||||||||||
| #8. | 30% | 26.58 kW | (+)84.64% | 94.32% | ||||||||||||||||||||
◊. The power-factor computation if 3 step of capacitor with 78.24kvar is put when using 70.89kW of load with 80% of load factor
