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This energy management software has been designed to answer the
differing requirements of management who want
analysed data for strategic planning, audit, accounts or tariff
negotiations and site personnel who need real time
information to optimise plant processes, with the flexibility to
move to automatic control if desired.
EnergyWizard has been developed as a result of
numerous requests from clients who anticipated the opportunities and
pitfalls of the deregulated energy markets of the 1990s and is an
additional feature to our very successful MicroScan 2ooo SCADA
package.
Intech Instruments Ltd and ECNZ (who produced the origional
conceptual design), both have long track records in the Energy
Sector. Intech Instruments Ltd supplies software, instrumentation
and SCADA systems to Industry in 22 countries world wide. ECNZ is
New Zealands primary electricity producer with considerable
knowledge of electricity markets and large industrial customers.
We believe that the future energy market will lead to more
complex industrial tariffs and more price volatility, making
automation of load control increasingly valuable as a necessary cost
control function. There are two main Wizard modules, the Reporter
and the Controller.
The Reporter
The Wizard Monitor (with your existing MicroScan 2ooo SCADA
package) monitors analogue data (kWs, kVAs, litres, or kgs) and can
either show these instantaneous values on a mimic diagram on the
computer screen or integrate them over time to produce energy
consumption figures (e.g. kWhs, kVahs) or flow rates (e.g.
litres/sec or kg/hr). These consumption values can be logged
periodically.
The Wizard accepts 200 configurable data streams. Data are
appended to a master file which is configured to accept a months
half hour data. (note that it is the typical
practice to define the peak kW as the average kW in the half
hour with the highest kWh.)
This convention perpetuates the need for half hourly logs of data
accumulated over the half hour, resetting to zero each period, as
the base requirement. Similary steam flows are usually described in
kg/hr or gas flows in GJ/hr and the half hour log provides
sufficient sensitivity to produce meaningful flow figures.
Any number of these prime data streams can be combined to provide
a maths grouping being a new single stream of data.
For example, this may include half the electricity from a feeder A,
and all of the electricity from a feeder B, which may equate to the
energy used by a product.
Once a maths grouping is established, targets
for consumption versus product output can be set and variance and
sensitivity analysis carried out. Similary targets for the
controller module can be set so that effective load shedding will
occur.
The Controller
The controller module is designed so that the plants energy
manager can set up a Master Matrix of all plant
which can be shed and the conditions under which this can be done.
For example, a chiller may need to operate between -18ºC and -25ºC
or a pump may only be allowed four starts an hour.
If the plant is likley to exceed set targes the
controller interrogates the master matrix to see
what is available for shedding. This will be displayed on the screen
with all applicable constraints. The automatic controller can be
placed in charge. |
