Pump scheduling involves optimisation at a sub-daily timestep (half-hourly or hourly) for generation of pump and valve schedules, taking into account pump efficiencies and tariff variations.
MISER can be used in either an off-line or on-line mode. Off-line, MISER-PS can be used to produce results under alternative operational scenarios (demands, storage, etc) for:
Short-term production planning (i.e. within day operation over next 1-7 days)
In the on-line version, Miser-PSL, a connection is made to telemetry in order to obtain the latest network information (e.g. licence usage and prevailing reservoir levels) and for derivation of demand forecasts. It is designed to be used in a Control Room environment, providing:
Automatic production of pump schedules
Automatic forecasting of short-term demands (e.g. 24hrs ahead)
Performance monitoring of demands, storage and flows against forecast levels
The advantages of an on-line link can be significant and include:
Reliability of input
Reduced manual input requirements
Optimal solution is based on data of high currency and is therefore expected to be more readily implemented
Performance monitoring (comparison of expected actual performance versus actual system behaviour) becomes possible allowing early detection of and response to deviations
Re-optimisation at any point in the day using updated data (e.g. outages) is simpler and therefore more likely to happen
Maximum potential for cost savings
Tynemarch have significant experience in identifying robust solutions for the handling of potential telemetry failures, and ensuring that the optimiser will always provide a production plan.
5-10% pa electricity savings are typically achievable with MISER-PSL.
Further information can be found in the CIWEM 2003 paper available in publications.
