Abstract:
It is presented a method for determining setpoint parameters for controlling a HVDC link (10) provided in parallel with a transmission corridor (11) comprising at least one AC line (12a, 12b). The comprises the steps of: obtaining a first set of measurements of a first end of the transmission corridor; obtaining a second set of measurements of a second end of the transmission corridor; determining which one of a first area (5a), connected to the first end of the transmission corridor, and a second area (5b), connected to the second end of the transmission corridor, that has a deficit of active power and which one of the first area and the second area of the transmission corridor that has a surplus of active power; determining a model equivalent, based on a corridor equivalent of the transmission corridor and a generator equivalent of the area operating predominately as a generator; and determining setpoint parameters for the HVDC link based on the model equivalent.
Abstract:
The invention concerns a switchyard for interconnecting direct current power networks (N1, N2, N3) and a direct current power transmission system comprising such a switchyard. The switchyard comprises a number of interconnected entities comprising at least two main circuit breakers (MB1, MB2) and a number of transfer switches (TS1, TS2, TS3, TS4, TS5, TS6, TS7), where each network has two connections to the switchyard, at least one via a transfer switch (TSi, TS2, TS3, TS4, TS5, TS7), each main circuit breaker has four connections in the switchyard, two at each end of the main circuit breaker and at least one via a transfer switch (TS1, TS2, TS3, TS4, TS5), and each network is joined with every other network via a corresponding path through at least one main circuit breaker as well as via a corresponding path bypassing all main circuit breakers.
Abstract:
The invention concerns a switchyard for interconnecting direct current power networks and a direct current power transmission system comprising such a switchyard. The switchyard comprises a number of interconnected entities comprising at least two main circuit breakers and a number of transfer switches, where each network has two connections to the switchyard, at least one via a transfer switch, each main circuit breaker has four connections in the switchyard, two at each end of the main circuit breaker and at least one via a transfer switch, and each network is joined with every other network via a corresponding path through at least one main circuit breaker as well as via a corresponding path bypassing all main circuit breakers.