empower Energy and Peak Load Management
Peak Load Management
For customers with load metering, the energy consumption is continuously metered in ¼h
steps. The maximum ¼h value of the year will be used as the factor for calculating the
pricing for power. Typical power prices in Germany are approximately 50 € per kW and
year. If the peak power value of a year is 200 kW, the annual power price is
10 000 EUR. By continuously checking the real time power consumption
savings can be realized from utilizing dedicated, short switching techniques
subsequently reducing the power of building loads such as air conditioning, compressors
and heatings. Using the previous example, annual power peak may be reduced 20 to
25 %, resulting in annual savings of 2 000 to 2 500 €.
Particularly in the field of e-mobility, peak load management can avoid high costs due
to the possible extremely high charging currents.
Self-Consumption Optimization
On sites with own power generation, e.g. thanks to photovoltaic systems, the embyt
system is also ideally suited for self-consumption optimization, in addition to peak
load regulation. If charging stations for e-cars are available, embyt can save energy
costs by an optimal charging strategy.
System overview
The system consists of a central PLC controller and other IO modules. The figure shows
an example with 4 connected modules. The energy meter (S0 interface) is connected to
their inputs, and the energy consumers (loads) to be controlled are connected to their
outputs, usually via contactors. This system automatically performs the peak load
regulation. The embyt control software runs on a standard PC connected via LAN or
Internet with the controller. The PC software is used for parameterization and
visualization, while the peak load regulation runs autonomously on the controller. The
embyt control software can be installed on any number of PCs in parallel, accessing all
data of load management.
Princple
Peak loads that are well above the average consumption arise often by chance, when many
large energy loads are unnecessarily switched on simultaneously. Oftentimes, heaters may
be turned off for a short time without a noticeable deficiency. Also air conditioning or
compressors can be switched off for some time as the cold is stored for some time
anyhow. Similarly, many other loads can be located, which may be reduced in consumption
under certain conditions at peak loads. The difficulty is to identify these loads and
define conditions under which these loads may be turned off.
With the embyt Energy Management System these conditions are programmed graphically, so
the system is completely self-sufficient to make appropriate interruptions at peak
loads. The programming is carried out via an intuitive graphical system, so that no
knowledge is required that goes beyond the knowledge of a skilled electrician.
With the PC software the energy use, load distribution and the costs may be evaluated in
detail. For any irregularities the system automatically sends emails to one or more
recipients.
Further Information
The manual can be downloaded in the
German language to describe the features and provide detailed instruction on how to use
the PC software.
For a cost estimation or a quotation please contact us.
For customers in Austria, please contact the specialists from our Austrian partner
Energie-Plan + Management GmbH.