Abstract
After fully asynchronous networking with Yunnan Power Grid and China Southern Power Grid, a multi-DC sending-end grid with a relatively weak grid structure and low load level, has prominent frequency and voltage stability, which makes Yunnan Power Grid have complex security and stability problems. Therefore, beginning with the load model and its variable, in this study, the effects of four static load models and four dynamic load models are compared with regard to the frequency and voltage stability of the Yunnan power grid’s asynchronous interconnection system. It simulates and analyzes how load model parameters affect the frequency and voltage stability of the transmitting end power grid of the asynchronous interconnection system while Puqiao DC is experiencing unipolar and bipolar blocking faults.
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