I have attached the picture of VSC-based HVDC link system. Refer to figure_1, it consists of two converters. When I demand active power from one converter, the other converter follows this demand of active power. On the other hand, when I demand the reactive power from one converter, the other converter DOES NOT follows this demand of reactive power. (For reactive power, there is only one converter response to the demand value.) Can anyone explain this to me why both converters do not response in the same way for the demand of active and reactive power?
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