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Table 6 Capacitor switching selection of 125 kVAr capacitor bank

From: Coordinated control of DSTATCOM with switchable capacitor bank in a secondary radial distribution system for power factor improvement

S. no kVAr (Possible combinations) Range of kVAr demand (Qc) Capacitors switching preferences
  1 2 3
1 5 (1) 1–5-7.5 (C1) [1]   
2 10 (2) 7.6–10–12.5 (C2) [1] (C3) [1] Capacitor switch groups
3 15 (2) 12.6–15–17.5 (C2) + (C1) [1] (C3) + (C1) [1] Group (1) C1 = 5 kVAr
4 20 (1) 17.6–20–22.5 (C2 + C3) [1]   Group (2) C2 & C3 = 10 kVAr each
5 25 (5) 22.6–25–27.5 (C2 + C3) + (C1) [1] (C4 to C7) [4] Group (3) C4 to C7 = 25 kVAr each
6 30 (4) 27.6–30–32.5 (C4 to C7) + (C1) [4]   
7 35 (8) 32.6–35–37.5 (C4 to C7) + (C2) [4] (C4 to C7) + (C3) [4]  
8 40 (8) 37.6–40–42.5 (C4 to C7) + (C2 + C1) [4] (C4 to C7) + (C3 + C1) [4]  
9 45 (4) 42.6–45–47.5 (C4 to C7) + (C2 + C3) [4]   
10 50 (6) 47.6–50–52.5 C4 + (C5 to C7) [3] C5 + (C6 to C7) [2] (C6 + C7) [1]
11 55 (6) 52.6–55–57.5 C4 + (C5 to C7) + (C1) [3] C5 + (C6 to C7) + (C1) [2] (C6 + C7) + (C1) [1]
12 60 (12) 57.6–60–62.5 C4 + (C5 to C7) + (C2 to C3) [6] C5 + (C6 to C7) + (C2 to C3) [4] (C6 + C7) + (C2 to C3) [2]
13 65 (12) 62.6–65–67.5 C4 + (C5 to C7) + (C2 to C3) + C1 [6] C5 + (C6 to C7) + (C2 to C3) + C1 [4] (C6 + C7) + (C2 to C3) + (C1) [2]
14 70 (6) 67.6–70–72.5 C4 + (C5 to C7) + (C2 + C3) [3] C5 + (C6 to C7) + (C2 + C3) [2] (C6 + C7) + (C2 + C3) [1]
15 75 (3) 72.6–75–77.5 (C4 + C5 + C6) [1] (C5 + C6 + C7) [1] (C6 + C7) + (C1) + (C2 + C3) [1]
16 80 (2) 77.6–80–82.5 (C4 + C5 + C6) + (C1) [1] (C5 + C6 + C7) + (C1) [1]  
17 85 (4) 82.6–85–87.5 (C4 + C5 + C6) + (C2 to C3) [2] (C5 + C6 + C7) + (C2 to C3) [2]  
18 90 (4) 87.6–90–92.5 (C4 + C5 + C6) + (C1) + (C2 to C3) [2] (C5 + C6 + C7) + (C1) + (C2 to C3) [2]  
19 95 (2) 92.6–95–97.5 (C4 + C5 + C6) + (C2 + C3) [1] (C5 + C6 + C7) + (C2 + C3) [1]  
20 100 (2) 97.6–100–102.5 (C4 + C5 + C6 + C7) [1] (C5 + C6 + C7) + (C2 + C3) + (C1) [1]  
21 105 (1) 102.6–105–107.5 (C4 + C5 + C6 + C7) + (C1) [1]   
22 110 (2) 107.6–110–112.5 (C4 + C5 + C6 + C7) + (C2 to C3) [2]   
23 115 (2) 112.6–115–117.5 (C4 + C5 + C6 + C7) + C1 + (C2 to C3) [2]   
24 120 (1) 117.6–120–122.5 (C4 + C5 + C6 + C7) + (C2 + C3) [1]   
25 125 (1) 122.6–125–127.5 (C4 + C5 + C6 + C7) + (C1) + (C2 + C3) [1]