Sequential Load Flow Param

Description

 

The block specifies the parameters used by the sequential AC-DC load flow algorithm having the form of a script (LF_ACDC_solve_V2_1). The sequential load flow script is called by clicking Compute.

 

 

 

Parameters

 

AC-DC network model

Specify the name of the AC network model

Maximum iterations for the DC load flow solution

Maximum number of iterations allowed calculating the DC solution

Maximum sequential AC-DC load flows

Maximum number of sequential load flows allowed calculating the total solution

Execute

Call the script to compute the sequential AC-DC load flow. 

DC link steady-state model name

Specify the name of the DC link steady-state model. At least one DC link must be present in network.

DC link load flow report name

Specify the name of report file containing the results of the AC and DC load flows.

Rectifier AC bus name

Specify the name of the AC bus at which the rectifier of the DC link is connected.

PQ load name (Rectifier)

Specify the name the "PQ load” representing the rectifier converter unit loading during load-flow computation.

Note: Refers to the "Three-Phase Dynamic Load” block.  A PQ load should be inserted in the network model at each converter AC bus. Only the nominal voltage and frequency are set.

Inverter AC bus name

Specify the name of the AC bus at which the inverter of the DC link is connected.

PQ load name (Inverter)

Specify the name the "PQ load” representing the inverter converter unit loading during load-flow computation.

Second DC link

If selected, indicate presence of a second DC link in the network.

Second DC link steady-state model name

Specify the name of the DC link steady-state model. At least one DC link must be present in network.

Second DC link load flow report name

Specify the name of report file containing the results of the AC and DC load flows.

Second rectifier AC bus name

Specify the name of the AC bus at which the rectifier of the second DC link is connected.

PQ load name (Second rectifier)

Specify the name the "PQ load” representing the rectifier converter unit.

Second inverter AC bus name

Specify the name of the AC bus at which the inverter of the second DC link is connected.

PQ load name (Second inverter)

Specify the name the "PQ load” representing the inverter converter unit.

 

Example

Model LF_AC29bus_HVDCdemo_V2_1 represents an AC network in which a two terminal HVDC link (Link A) is embedded between nodes LG27 and MTL7.  In order to find the system load flow solution using the sequential AC-DC method the block Sequential Load Flow Param is included. The two PQ loads are added to represent the converters unit charging and are only effective during the load flow solution computation. See the File Exchange Demo Sequential AC-DC load flow method for two-terminal HVDC networks – Version 2.

MATLAB release MATLAB 9.1 (R2016b)