If you start or update the Feeder Load Management Tool from the Viewer, the tool's mode is defined by the Viewer's mode.
If you start or update the tool from the Feeder Load Summary window, the tool opens in real-time mode. Once the tool is open, you can switch modes by clicking the corresponding button on the toolbar or selecting the appropriate menu option.
When you start the tool in Study Mode or switch from real-time to study mode inside the tool, the Power Flow Study Mode Load Scenario dialog box prompts you to select the Load Profile from either the real-time system or from a specific period (hour and type of day).
Viewing and Modifying Study Session Parameters
The Study Session Parameters dialog box allows you to request a new Feeder Load Management calculation for the current study session's topology. You can specify the type of forecast to calculate (for example, next 24 hours, daily peaks, specific day, or a specific period) and alter various options to take into consideration.
An existing study session is used as the Feeder Load Management Tool Study Session or, if none exists, a new study session is created based on the real-time data. You can reset the study session to nominal or real-time data from the Viewer. To view the power flow option settings in the Viewer, select Show PF Options in the Viewer's Option menu.
Note: The Feeder Load Management mode does not change when the Viewer switches between real-time and study mode.
To display the Study Session Parameters dialog box, do one of the following:
• In real-time mode, select Study Mode from the Actions menu.
• In study mode, select FLM and Power Flow Options from the Options menu.
The Study Session Parameter dialog box displays the following fields and buttons.
Feeder Load Management Options Pane
• Hourly Forecasts: run hourly studies to include load scaling determined by real-time SCADA values
• Specific Day Forecasts: run hourly studies on the selected day.
• Daily Peak Forecasts: run daily peak studies.
• Specific Period - Run a single study for the specified period:
• Scale: enter the Scaling Factor, which is a number that modifies the loading conditions for the selected profile. Typically a value of 1.0 is used; if you want to study the impact of increased or decreased load, enter values greater than or less than 1.0, respectively.
• Day: select the type of day. In the product configuration, the Day options are Weekday, Weekend, and Seasonal Peak with capacitors on or off.
• Temp (F): chose the temperature range to use for adjusting load conditions or temperature based limits. For each real-time based day type (weekday, weekend), multiple sub profiles exist representing different temperatures bands to characterize how the load behaves on that type of day for a range of temperature (for example, 80°F - 90°F). Using temperature as a parameter allows better simulation results to be achieved. For example, a weekday at 60°F versus a weekday at 100°F will have far different loading conditions. For temperature based limits, this parameter will drive the limits used for power transformers and conductors. Each of these device types will have predefined limits for a temperature band and this value will drive the limit used in the analysis.
Note: The temperature parameter will be grayed out if both Temperature Based Profiles and Temperature Based Limits have been turned off. These can be set using SRS rules USE_TEMP_PROFILES and USE_TEMP_LIMITS, respectively. If temperature based profiles are turned off, it will be expected that a customer will provide a single profile for each load that will be used for all ranges of temperatures.
• Wind Speed (mph): select the wind speed available for wind power sources.
• Cloud Cover: select the amount of cloud cover (for example, Clear, Mostly Clear, Partly Cloudy, Mostly Cloudy, Cloudy)
• Residential Battery: select the profile for battery charge/discharge cycles (for example, On, Off).
• Residential Fuel: select the profile for fossil fuel use (for example, On, Off).
• Utility Battery: select the profile for utility scale battery charge/discharge cycles (for example, On, Off).
• Utility Fuel: select the profile for fossil fuel based units (for example, 25%, 50%, 75%, 100%).
• DR: select the profile for demand response objects (for example, On, Off).
Limits Pane
• Limit Type: The Limit Type is either Normal, Emergency (Long Term), or Emergency (Short Term).
• Season: Indicates the season (for example, Spring).
Note: The season drop‑down list will only be displayed if seasonal limits have been configured. If a project is using temperature based device limits, this option will not be available.
• Voltage Limits: Specifies high and low voltage limits.
Interval Pane
The Interval pane allows you to configure the forecast interval for the study. These options are only applicable to the Hourly Forecasts, Specific Day Forecasts, and Specific Period forecasts. Note that the maximum number of forecasts requested in a study is defined by the event management rule FLM Forecasts Study Period Defaults.
• Number of Hours: Set the number of hours over which the study will be run.
• Forecasts per Hour: Set the number of forecasts per hour. Note that if the FLM load period is set to 24 or less this option will be disabled and default to 1 forecast per hour.