This paper introduces the series-parallel hybrid resonance program and its application for the world’s first 500 kV XLPE submarine cable 1.7%

60 min AC withstand voltage test.4 reactor series-parallel combination programs of were proposed and checked.And 3 of them are used for dealing with live emergencies of equipment failure and big fluctuation of test voltage.Compared to "2 series and 4 parallel" reactor combination

the field test shows

for "2 series

3 parallel and 1 compensation" reactor combination

the quality factor decreases 25%

output current decreases 22% and total input current of variable-frequency power source decreases 20%.And the test frequency of both programs is 25.5 Hz.Moreover the double-end voltage monitoring and anti-corona wires were used.The plan when breakdown happens was proposed.All of them assured the successful proceeding of the test.