Frequency Conversion Hv Test Device Cable AC Resonance Test Systems

I, The test object and test requirements

220KV / 25000KVA main transformer neutral point and other electrical equipment test test, capacitance ≤ 0.01uF, test frequency 45-65Hz, test voltage 160kV, test time 1min.

II, The working environment

1. Ambient temperature: -100C -50 0C;

2. Relative humidity: ≤ 90% RH;

3. Altitude: ≤ 1000 meters;

III, The device main technical parameters and functions

1. Rated capacity: 160kVA;

2. Input power: single-phase 220 or three-phase 380V input frequency of 50Hz;

3. Rated voltage: 160kV;

4. Rated current: 1A;

5. Working frequency: 30-300Hz;

6. Device output waveform: sine wave

7. Waveform distortion rate: the output voltage waveform distortion rate ≤ 1%;

8. Working hours: rated load allowed continuous 5min; 1.1 times over-pressure 1 minute;

9. Temperature rise: rated load continuous operation 5min temperature rise ≤ 65K;

10. Quality factors: the device itself Q ≥ 30 (f = 45Hz);

11. Protection: the test object has over-current, over-voltage and flashover protection test (see the frequency conversion power supply section)

12. Measurement accuracy: System RMS 1.5;

IV. Device capacity to determine

The design of four reactor, the single reactor is 40kVA / 40kV / 1A / 110H, the total capacity of the device is 160kVA.

1,220KV / 25000KVA main transformer neutral point and other electrical equipment test, capacitance ≤ 0.02uF, test frequency 45-65Hz, test voltage 160kV, test time 1min.

Use four reactors in series (coefficient 1.1), then L = 110 * 4 * 1.2 = 528H, with a 160kV / 5000pF compensation capacitor, then:

Test frequency: f = 1 / 2π√ LC = 1 / (2 × 3.14 × √528 × 0.015 × 10 -6) = 56.55 Hz

Test current: I = 2πfCU test = 2π × 56.55 × 0.015 × 10-6 × 160 × 103 = 0.85A

Installation capacity of 160kVA / 160kV, divided into four sections of the reactor, the reactor section for the 40kVA / 40kV / 1A / 110H, the use of reactors in series and parallel can meet the test requirements of the test object.

Test equipment used when the relationship list