Product(s):	WaterSight
Version(s):	10.00.
Area:	Documentation

Overview

Zones with very large industrial demands may be more accurately modelled in terms of temporal distribution of the demands in case AMI (smart meter) data is available . In case AMI data is available for the Large Customers, WaterSight can use that data to automatically update the patterns for those specific customer meters in the model and a remainder flow pattern - given by the difference of the total zone flow and the sum of all large customers flow - will be applied to the rest of all customers of the model that are within the zone. 

Workflow

In the Administration Page >> Numerical Models  , once uploading a hydraulic model or when editing an existent model, there is the option to use smart meter adjustments or not. This option will only be available if the zone demand adjustment is set to System Total (Update Demand & Patterns Global) or Zone by Zone. 

Fig1 - Enabling smart meter adjustment option

In case smart meter adjustment is set to No (this is the case for example when smart meter data is not available in WaterSight or the data is not reliable) the normal zone demand adjustments or system total demand adjustment method can be used. For more information please take a look at this article - Automatic Demand Adjustment.

In case smart meter adjustment is set to Yes, WaterSight will use smart meter data (15 minutes or hourly flow - these are the minimum time steps required) to automatically adjust consumption and patterns of those smart meters in the model based on the real data. A remainder flow pattern - given by the difference of the total zone flow and the sum of all large customers flow - will be applied to the rest of all customers of the model that are in that zone. 

Requirements

In order for WaterSight to be able to use smart meter data to adjust model demands it is required that:

• Smart meters are loaded into WaterSight (configuration can be done by importing an excel template under Admin >> Smart Meters page) and receiving data (sensor pusher is connected to smart meters data sources and pushing data to WaterSight), with a minimum time step of 15 minutes or 1 hour. 
• Smart meters ID, defined in the Admin >> Smart Meters page , need to match with the Label field in the Customer Meters elements in WaterGEMS (just for those that the user wants to use in the model)
• WaterSight will only use (for adjusting model demands) the smart meters which are marked as YES for the field "Is Large Customer" , defined under Admin >> Smart meters page.
• Large customers that do not have enough data for the entire duration of the model simulation (and for which a pattern in WaterSight can not be calculated) will be ignored. 
• When choosing the option demand adjustment zone by zone, if a specific zone is omitted/not selected by the user, all smart meters that exist in that area will also be ignored. See example below in Figure 1.

Fig2 - Only the smart meters for the Listed zones (Fire District, Northern Zone, Straits Zone, Town Hall Zone, Oakville High Zone, Oakville Low Zone) will be considered when adjusting customer model demands. 

 

Validation

Steps are the following in order to check the model accuracy by using zone demand and smart meter adjustments:

• Check the zone net flow: in the Maps page, turn on the hydraulic model and click in the pipe associated with the flow sensor signal corresponding to the inflow or outflow of a zone and check if measured flow matches modelled flow. Below an example where the modelled flow (at blue) matches almost perfectly with the measured flow (black line)

Fig 3- Comparing modelled flow with sensor flow (using the automatic demand adjustment option zone by zone)

• Check the large customer meter flow:
  • Open map page, turn on Hydraulic Model and tun on the junctions
  • Turn on Large customers widget
  • Click in a model junction near to the large customer >> check the model demand
  • Click in the large customer meter sensor >> check the flow
  • Compare the model demand with the demand flow (see example below)

Fig 4 - On the left, modelled demand at the model junction near the large customer. On the right, smart meter flow from the large customer

Note: It should also be possible to also create a fictitious junction in the WaterGEMS model to represent that large customer, then create a SCADA element in WaterGEMS to represent that large customer and associate it with that junction using as attribute the demand. In that case it should be possible in WaterSight to click in the junction element and see in the same graph the modelled demand and measured flow. However please make sure that by creating this fictitious junction you are not duplicating the customer demand in the model.

See Also

Automatic Demand Adjustment

Numerical Model Administration

Imposing Initial Conditions from Sensors to the Model

OpenFlows WaterSight TechNotes and FAQ's

WaterSight Learning Resources Guide