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ETAP PowerStation • ETAP is a multi study tool and it has several modules which includes: load flow AC and DC, short circuit, transient stability, optimal load flow, cable pulling, grounding, etc. The program can be set on edit and study mode In the EDIT MODE you could add the different components from the library (caution there are two libraries which are displayed on the right hand side bars a D
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ETAP PowerStationLoad FlowEE 533
Fall Quarter 2011
California State University Los Angeles
• ETAP is a multi study tool and it has several modules which includes: load flow AC and DC, short circuit, transient stability, optimal load flow, cable pulling, grounding, etc.
• The program can be set on edit and study mode• In the EDIT MODE you could add the different components from the library (caution
there are two libraries which are displayed on the right hand side bars a DC and AC components
• Once you chose a study to run in this mode the components library will disappear and you cannot add new components from here only from the EDIT model. In this mode you also have access to the crystal reports
• Case selector allows you to setup variations from your base case
ETAP PowerStation
EDIT MODE STUDY MODES
CASE SELECTOR
BUS (AC)• To enter a bus drag and drop from the AC components library
• You only need to fill the Info tab section, if you are running a load flow study
• Different from PSLF the bus type is determined by what is connected to it ,e.g., if a generator is connected to it based on the generator page setting it will be identified as swing or PV bus. When a load and not generator is connected it will automatically classify it as PQ bus
Data Required
Bus Name
In service/ Out of Service
Type of connection
Initial voltage
TRANSFORMER (info tab)• To enter a bus drag and drop from the AC components library
• You need to enter data on the Info and rating tab only if running a load flow
• Different from PSLF the bus type is determined by what is connected to it ,e.g., if a generator is connected to it based on the generator page setting it will be identified as swing or PV bus. When a load and not generator is connected it will automatically classify it as PQ bus
Data Required
ID
In Service /Out of Service
Connection
Standard (by default ANSI always chooseit unless running a study based on European standard)
• If the X/R ratio is not given choose typical if left as zero you will get an error message as this ration cannot be infinite. In PSLF you could leave it as zero by not entering the real losses
• If you are not given the transformer impedance the a typical value may also be chosen
TRANSFORMER (rating tab)
Required Data
MVA base
%Z (if X/R not given use typical)
TRANSMISSION LINE (info tab)• To enter a transmission line drag and drop from the AC components library
• You need to enter data on the Info and impedance tab only, if running a load flow
Data Required
ID
In Service / Out of Service
Connection
Length (if you user defined impedance is chosen leave default values)
TRANSMISSION LINE (impedance tab)• Chose the User‐Defined option (notice that the impedance entry table is not
available to edit)
• You need to enter data on the Info and impedance tab only, if running a load flow
Data Required
Positive Sequence Impedance (enter R‐T1 and R‐T2 equal)
Choose user defined
Units (leave as default)
Synchronous Generator(info tab)
• To enter a generator drag and drop from the AC components library
• You need to enter data on the Info and rating tab only, if running a load flow
• The rating library entry mode changes based on the configuration mode chosen (Swing or Voltage Control)
Data Required
ID
In Service / Out of Service
Operation Mode (Swing , Voltage Control)
Synchronous Generator(rating tab – voltage control)
• If the generator is set to work in voltage control mode, under the generator category table you may only modify the % voltage, Real Power output (MW), Qmax and Qmin; (therefore known as PV bus)
• Under rating section only need to enter the MVA, kV and %pf all other fields are self populated
Data Required
kV base
MVA base
%pf
%V (schedule voltage)
P (schedule MW)
Qmax (+MVAR)
Qmin (‐MVAR)
Synchronous Generator(rating tab – swing)
• If the generator is set to work in swing mode, under the generator category table you may only modify the % voltage, angle , Qmax and Qmin
• Under rating section only need to enter the MVA, kV and %pf all other fields are self populated
Data Required
kV base
MVA base
%pf
%V (schedule voltage)
Angle (set at zero)
Lumped Load (info tab)
• For fix load (no voltage dependent) used the lump load
Required Data
ID
In Service / Out of Service
Connection (3phase)
Lumped Load (info nameplate)
• Move the adjuster on the load type setting to 100% constant kVA
Required Data
MW
Mvar
Rated kV
Load Type
AC Load Flow Mode
• You could run the load flow solution from here• Check the display model• Check the crystal report• Set the alarm
Run Load Flow
Chose load flow display options
Choose Components Data Display options
The END
