shall be derived from test results obtained by adhering to the WECC Generating Unit Model Validation Policy for each unit represented in WECC Base Cases according to thresholds as specified in This includes, as appropriate to the model, items such as inertia constant, damping coefficient, saturation parameters, and direct and quadrature axis reactances and time constants. Generator wners shall submit power plant data in accordance to the size thresholds as described in the Netting of planned generators represented in WECC Base Cases shall conform to the threshold requirements of the The MWCAP parameter in the dynamic turbine-governor model shall be greater than or equal to the Pmax parameter of the generator steady-state model to avoid governor initialization problems. Power System Stabilizer (PSS) Dynamic data shall be submitted for all generators that have active PSS. See the document. Existing generators shall follow the . Load Characteristics The goal of this section is to model effects of voltage and frequency on load as accurately as possible. Keep dynamic load data consistent with reported steady-state data supplied. Modeling voltage and frequency characteristics explicitly for each individual load, if possible. However, use default zone or area records for buses not explicitly defined. For loads less than 5 MW, Area Coordinators will work with WECC staff to establish a default load representation record for each area to represent loads not modeled with the CMPLDW model. This is to avoid the load representation defaulting to constant power (PSLF default). If actual dynamic load characteristics are not available, load should be modeled as constant current P, and constant impedance Q. Bus specific exceptions to the default load representation must be submitted to WECC staff for inclusion in the MDF. Underfrequency Load Shedding (UFLS) Include nderfrequency oad hedding records for all loads that have underfrequency relays on the interconnected system. Ensure the pickup frequency of each stage is lower than that of the previous stage. UFLS must comply with WECC-coordinated off-nominal requirements as specified in the document.
shall be derived from test results obtained by adhering to the WECC Generating Unit Model Validation Policy for each unit represented in WECC Base Cases according to thresholds as specified in This includes, as appropriate to the model, items such as inertia constant, damping coefficient, saturation parameters, and direct and quadrature axis reactances and time constants. Generator wners shall submit power plant data in accordance to the size thresholds as described in the Netting of planned generators represented in WECC Base Cases shall conform to the threshold requirements of the The MWCAP parameter in the dynamic turbine-governor model shall be greater than or equal to the Pmax parameter of the generator steady-state model to avoid governor initialization problems. Power System Stabilizer (PSS) Dynamic data shall be submitted for all generators that have active PSS. See the document. Existing generators shall follow the . Load Characteristics The goal of this section is to model effects of voltage and frequency on load as accurately as possible. Keep dynamic load data consistent with reported steady-state data supplied. Modeling voltage and frequency characteristics explicitly for each individual load, if possible. However, use default zone or area records for buses not explicitly defined. For loads less than 5 MW, Area Coordinators will work with WECC staff to establish a default load representation record for each area to represent loads not modeled with the CMPLDW model. This is to avoid the load representation defaulting to constant power (PSLF default). If actual dynamic load characteristics are not available, load should be modeled as constant current P, and constant impedance Q. Bus specific exceptions to the default load representation must be submitted to WECC staff for inclusion in the MDF. Underfrequency Load Shedding (UFLS) Include nderfrequency oad hedding records for all loads that have underfrequency relays on the interconnected system. Ensure the pickup frequency of each stage is lower than that of the previous stage. UFLS must comply with WECC-coordinated off-nominal requirements as specified in the document.
WECC_Data_Preparation_Manual_BCCS_WECC_TECH_Zones.docx