Variables

Sets the start value for a given variable.

Sets the start value for a given variable.

Given a variable that is indexed by component IDs, builds the standard solution structure.

Creates binary variables for all check valves in the network, i.e., z_check_valve[a] for a in check_valve, where one denotes that the check valve is open and zero denotes that the check valve is closed.

Creates demand variables for all dispatchable junctions in the network, i.e., demand[i] for i in dispatchable_junction.

Creates bounded (by default) or unbounded total hydraulic head (or head) variables for all nodes in the network, i.e., h[i] for i in node.

Creates head gain variables corresponding to all pumps in the network, i.e., g[a] for a in pump. These denote head gains between nodes i and j.

Creates binary variables for all PRVs in the network, i.e., z_pressure_reducing_valve[a] for a in pressure_reducing_valve, where one denotes that the pressure reducing is currently open and zero otherwise.

Creates binary variables for all pumps in the network, i.e., z_pump[a] for a in pump, where one denotes that the pump is currently operating (i.e., on), and zero indicates that the pump is not operating (i.e., off).

Creates outgoing flow variables for all reservoirs in the network, i.e., qr[i] for i in reservoir. Note that these variables are always nonnegative, as there is never incoming flow to a reservoir.

Creates binary variables for all network design or design resistances in the network, i.e., x_res[a] for a in pipe, for r in resistance[a], where one denotes that the given resistance is active in the design.

Creates binary variables for all shutoff valves in the network, i.e., z_shutoff_valve[a] for a in sv, where one denotes that the shutoff valve is open and zero denotes that the shutoff valve is closed.

Creates outgoing flow variables for all tanks in the network, i.e., qt[i] for i in tank. Note that, unlike reservoirs, tanks can have inflow.

Create flow-related variables common to all directed flow models for edge-type components.

Create flow-related variables common to all directed flow models for edge-type components.

Creates flow variables for MILP formulations (q, lambda, x_pw).

Create network design flow variables for directed flow formulations.

Creates network design flow variables for MILP formulations (q_des_pipe, lambda, x_pw).

Creates network design flow variables for NLP formulations (q_des_pipe, x_des).