Shijidianli (SJXZ) 270kVA / 270K series resonance technical solution Table 2

(1) Determination of device capacity The six reactor is designed, and the single-section reactor is 45kVa / 45kV / 1A / 110H, the total capacity of 270kVA. The AC withstand voltage test of 10km / 300mm2 cable 3km, capacitance is ≤1.126uf, the test frequency is 30-300 Hz, the test voltage is 22kV, and the test time is 5 min. In parallel using the reactor six, L = 110/6 = 18.33h, then: Test frequency: f = 1 / 2π√LC = 1 / (2 × 3.14 × √18.33 × 1.126 × 10-6) = 35Hz Test current: i = 2πfcu test = 2π × 35 × 12 × 103 = 5.45A The device capacity is set to 270 kVa / 270 kV, a divided reactor, and the reactor is 45kVa / 45kV / 1A / 110H, and the use of the reactor skewide and can meet the above-mentioned test requirements. 0718D (2) Excitation transformer 15kva / 4 / 16kv / 0.4kV Rated capacity: 15kva; Input voltage: 0-400V, single phase Output voltage: 4 / 16kV Structure: dry style Weight: about 75kg (3) Variable frequency power supply 15KW / 220 / 380V Rated output capacity: 15KW Working power supply: 220/380 ± 10% V (single / three-phase), power frequency Output voltage: 0 -400V, single phase, Rated input current: 37.5A Rated output current: 37.5A Voltage resolution: 0.01kV Voltage measurement accuracy: 1.5% Frequency adjustment range: 30 - 300Hz Frequency adjustment resolution: ≤0.1Hz Frequency stability: 0.1% Running time: 60 min under the rated capacity The maximum temperature of 60 min components in the rated capacity is ≤65K; Noise level: ≤50db (4) High voltage reactor 45kva / 45kV Rated capacity: 45kVA; Rated voltage: 45kV Rated current: 1A Inductance: 110h / single section; Quality factor: ≥ 30 (f = 45 Hz); Structure: dry style Weight: about 45kg (5) Capacitor voltage divider Rated voltage: 270kV; High voltage capacitance: 500PF Medium loss: Tgσ≤0.5% Split ratio: 3000: 1 Measurement accuracy: Valid value level 1.5 Weight: about 26kg, read full text

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