| Abstract |
The main focus of this study is an electrical interconnection between two large asynchronous power
systems. As an example the extension of the European power system UCTE in an eastward direction is
investigated, and technical concepts are shown for realizing a high-power transmission system from
Germany to Russia over the distance of 2000 km. Thereby the different considerations and
requirements lead to the maximum power capacity which is the basic parameter of the system.
For this high-power transmission a model for a HVDC transmission system is developed having a
rated dc power of 4000 MW. With this configuration the connection points to the inverter side
network can become weak and there can occur stability problems of the HVDC. For this reason
besides the conventional HVDC converter the technology of capacitor commutated converters (CCC)
is presented and the configuration of the CCC is described. For both options a model for the
transmission system is developed and verified. The steady-state as well as transient behavior is
analyzed and the results of the simulations are shown. The advantages of the CCC are indicated for
high-power transmissions especially when operated at weak ac networks. |
