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Location

This example model can be found in the HYPERSIM under the category "How To" with the file name "PSSE_Import_118_Bus.ecf". The PSS®E reference model is provided with this example in folder PSSE_ref_model, and the folder structure of this example is as follows:

Description

The example utilizes a modified edition of the original IEEE118 bus model mentioned in [2]. The IEEE 118-bus test case is an approximate representation of the American Electric Power system in the U.S. Midwest as it existed in December 1962. The system consists of 19 generators, 35 synchronous condensers, 177 lines, 9 transformers, and 91 loads [2]. All gen units except for gen_69 and gen_89 are identical and each consists of a GENROU, EXST1, TGOV1, and PSS1A. The gen unit of gen_69 which is on the slack bus has only a GENROU. Finally, the gen unit of gen_89 consists of a GENROU and a TGOV1.

The original benchmark network is a model implemented in PSS®E v32.1.0. Then, the PSS®E reference model is imported to HYPERSIM via the Unified Database. The successful import of the PSS®E model and accurate mapping of all components with their respective parameters in HYPERSIM are demonstrated in this example. All the necessary components required to complete the IEEE-118 bus benchmark model in HYPERSIM are available in the Unified Database.

Import the PSS®E model

The goal of the PSS®E import tool is to save time by automatically importing models from PSS®E to HYPERSIM, as well as to avoid potential errors caused by manual importing. The PSS®E import tool comprises a parser, mapper, and exporter. The parser analyzes and interprets PSS®E model components and parameters, converting the PSS®E file into a list of objects. The mapper establishes mappings between PSS®E and Unified Database (UDB) components and parameters. Finally, the exporter creates the HYPERSIM model after successful database import.

1. Create a new HYPERSIM model

2. Follow the steps in PSS®E Network Import to import the model.

   • The folder named PSSE_ref_model contains three files: IEEE_118_bus.raw, IEEE_118_bus.dyr, and IEEE_118_bus.gps. The first two files (IEEE_118_bus.raw and IEEE_118_bus.dyr) are required, while the third file (IEEE_118_bus.gps) is optional. It is essential that all three files have the same name, and in this case, they do.

3. Wait until the end of the import process. A message “Import successful” in the Import Panel interface indicates that the import is completed.

Analysis and adjustment of model

Once the import process of the ieee118 case is finished, it is necessary to analyze the generated model to identify and address any potential errors before initiating the simulation.

To conduct an initial analysis of the model, simply select the Analyze button found within the Network section of the HYPERSIM tab.

As illustrated in below, an error would occur when the analysis is performed.

This error occurs when a combination of a CP transmission line model and a PI transmission line model are connected in parallel. The CP model allows the network to be decoupled into two independent cores, while the PI model does not possess this capability, leading to the occurrence of this error. In order to address this issue, the user must replace the two CP lines specified in the error (line_35_to_37_1 and line_54_to_55_1) with two PI lines. The parameters for the PI lines being substituted should be set according to the illustrations provided below.

To configure the parameters line_35_to_37_1, set the parameters in the following manner:

Sequence

Sequence
Self impedance - Line 1
	Zero	Positive
R	1.107	110.664E-3
L	3.979E-3	1.326E-3
C	4.849E-9	9.698E-9

To configure the parameters line_54_to_55_1, set the parameters in the following manner: