Method and equipment for avoiding RIP loop circuit in CE dual-homing network
The invention discloses a method for avoiding RIP loop circuit in a CE dual-homing network, comprising the following steps: configuring CE dual-homing PE with addition and analysis functions of an AS number, acquiring the AS number carried in RIP message according to previous configuration when RIP route is introduced into BGP, and comparing the AS number with a local AS number; and discarding the RIP message when the AS number is the same with the local AS number, thereby avoiding loop circuit message occurred between the CE and the two PE connected with CE when RIP route and BGP route are mutually introduced in the CE dual-homing network.
A description of how accurate system modelling of a dc system with an electromagnetic transient simulation program can be used to study and correct interbipole oscillations between converters connected into a parallel multiterminal system is given. The paper shows how to decide on the detail of modelling that is required, and demonstrates that it is often not enough to use prepackaged , generic HVDC control models, supplied with these programs. The detail of control models that are used in the electromagnetic simulation programs are shown to have a significant impact, in some cases, on the simulation results. In particular, a case of six hertz oscillations, in the dc currents of two converters on the Nelson River System, is accurately simulated, and it is shown that control modifications suggested by the simulation actually do eliminate the interbipole oscillations.