The DC access capability for multi-infeed high voltage direct current(HVDC)transmission system is an important issue that is awakening ever-increasing concern of power companies. Proceeding from the actual problems caused by large-scale multi-infeed HVDC

the main factors limiting the DC access capability are analyzed. Accordingly

a method of solving DC access capability considering such constraints as peaking capability

multi-infeed short circuit ratio

voltage stability

frequency stability and transient stability is proposed

by which the DC access capability assessment in China East Power Grid is worked out. For the main limiting factors

suggestions for improving DC access capability and optimizing the layout of multi-infeed HVDC are made.