The Hydropower—System Schedule rule allows you to specify a hydropower generation requirement that a set of reservoirs (a reservoir system) will operate to try to meet. This rule describes the hydropower generation requirement in the same manner as the Hydropower—Schedule rule (as described above). The System Schedule rule, however, has some additional options for specifying the power generation pattern and for identifying reservoirs whose power generation and/or storage can be used to meet the system requirement.

To cause a reservoir to operate to meet a system power requirement, it must have the System Schedule rule in the currently active zone of its operation set. The easiest way to do this is to create the rule in one of the reservoirs, then add the rule to the operation set(s) of the other reservoirs in the system by selecting it from the "Use Existing" list.

The Hydropower—System Schedule rule editor is shown in "Figure: Hydropower - System Schedule Rule Editor" and its options and attributes are described below:

Figure: Hydropower - System Schedule Rule Editor


  • System Generation Requirement—to specify what values of the system generation requirement table mean, what their units are, and how the requirement is to be met, click the Options button to open the Power Generation Requirement editor which is the same editor used by the Hydropower—Schedule rule, so please refer to "Hydropower - Schedule" above for its description.
  • Power Generation Requirement table—Complete the power requirement table as appropriate, depending on the options selected in the Power Generation Requirement editor. For example, if Monthly Total MWH was selected, then enter the total monthly requirement for each month of the year in the table.
  • Power Generation Pattern—as with the Hydropower—Schedule rule, the power generation pattern specifies how the power requirement is distributed across the weeks, days, and timesteps of the requirement period. However, with the System Schedule, you can specify for each reservoir (that operates to meet the system requirement) whether the Power Generation Pattern that that reservoir should use is specific to that reservoir (Local) or is the pattern defined to be shared by one or more reservoirs in the system (System). In either case, the Power Generation Pattern editor is the same and is described in detail in "Power Generation Pattern".

    Figure: Power Generation Pattern


    • Specify Local Generation Pattern—this option allows you to specify a different generation pattern for each reservoir that operates to meet the system power requirement. If you choose this option, you will need to edit the power pattern in the system hydropower rule from each reservoir that includes the rule in its operation set.
    • Specify System Generation Pattern—this option allows you to specify a single generation pattern that will be used by all the reservoirs that operate to meet the system power requirement.
    • Edit Pattern—use this button to open the Power Generation Pattern editor, where you will specify a (local or system) pattern for meeting the system hydropower requirements. Please see "Power Generation Pattern" for a full description of the purpose and use of the Power Generation Pattern editor.
  • Specify Energy Requirement with External Time Series—with this option checked, you are telling ResSim to use an External Time Series to be identified in the alternative as the specification of the Generation Requirement for this rule; this disables the System Generation Requirement Options and table. This option makes the Hydropower—System Schedule rule very similar to the Hydropower—Time Series Requirement rule rather than the Hydropower—Schedule rule.
  • Operating Reservoirs…—use this button to open the Hydropower-System Rule: Operating Reservoirs list. This list shows the reservoirs that have this rule in their operation set(s) and are, therefore, operating to meeting the power generation requirement called for by this rule.
  • Contributing Reservoirs…—use this button to open the Hydropower-System Rule: Reservoir List dialog ("Figure: Hydropower System Rule - Reservoir List Editor"). The purpose of this dialog is to allow you to identify those power-producing reservoirs in your network that do not actively operate for this system hydropower requirement but whose generation can be counted toward meeting it. You need not add reservoirs which will actively operate for this requirement, they will automatically be added to the "Selected" list when you add this rule to their operation set(s).

    Figure: Hydropower System Rule - Reservoir List Editor