The test is a part of type test which is UHVDC converter valve multiple valve unit（MVU）impulse voltage test. MVU impulse test based on quadruple valve has some problems

such as large size test circuit

more test objects

high test cost and so on. In order to solve the above problems

simulation load（SL）has been designed by scholars at home and abroad

and the MVU impulse test method based on SL is put forward. The test data from MVU impulse test based on SL is analyzed in this paper

and some conclusions are drawn as follows: the MVU switching impulse voltage test based on SL is scientific and reliable:to improve the SL voltage waveform the valve is needed to be connected in parallel with a suitable capacitor when MVU lightning impulse is based on SL: it is necessary to avoid thyristor level damage due to high voltage that difference is calculated between the whole voltage and the SL voltage when the MVU impulse test based on SL is operated

and the valve potential distribution monitoring has a certain guidance significance to MVU impulse test.