IEEE Power & Energy Magazine - May/June 2017 - 25

Enterprise Data Communications

sgs Comms Hub

sgs Core
New and Bespoke
Applications

sgs Power Flow

DMS

Integration Adapter

sgs Voltage

Integration Adapter

OMS

SCADA

New and Bespoke
Applications
Operational Systems/Field Data Communications

sgs Connect

RTU

DER

Field Devices

figure 3. An overview of the ANM Strata DERMS platform components and their integration with utility systems.

real-time set point required to maintain MP1 within thermal
capacity limits. This set point will be issued to the DER site,
where it will be passed to the DER control systems. If communication is lost to MP1 or the DER site, the controls will
enter a fail-to-safe state.

ANM Platform Deployment
The deployment of the ANM system to the AVANGRID territories involves integrating the incumbent systems deployed
at the energy control center, the deployment of sgs connect to
the DER locations, and the monitoring of key locations and
devices on the distribution system. This is shown in Figure 7.
Adopting this approach means that the ANM platform is part
centralized and part distributed. Each time a new DER connects, a new control system is installed at the DER site (with
local control capability) and integrated into the centralized
part of the ANM platform.

Case Study of Dynamic
Hosting Capacity
Early analysis of new DER interconnections has shown that the
main drivers of curtailment are contingencies on the distribution system, very light customer demand
concurrent with peak DER power
generation, and loss of communications between locations where
components of the ANM platform
are installed. As these are rare or
controllable events or both means
may/june 2017

that curtailment estimates are low and ANM is providing an
attractive interconnection solution for DER developers.
Table 1 presents the summary of curtailment results for
additional PV interconnection beyond the static hosting
capacity on a typical feeder with a thermal constraint (results
correspond to the example in Figure 6). The static-hosting
capacity on this feeder was approximately 4.5 MW, which
was saturated with a 0.5-MW biodigester and 4 MW of PVs.
A second 0.45-MW biodigester connected under the FICS
scheme accepted a very modest curtailment risk. The results
in Table 1 build upon this installed capacity.
It is interesting to note that with 4 MW of additional
PV capacity presented in the second column of the table,
the energy curtailed is 13.6% of the total production. This
only applies if that 4-MW interconnects under a single
FICS application or under a shared curtailment agreement.

PV PCC
Voltage and Current
Transducer

MODBUS

Key
DNP3 TCP Comms
DNP3 Serial Comms
MODBUS TCP Comms
Hardwired I/O

Connect+

DNP3

MODBUS

Hardwired

PV Inverter

PV Metering
Circuit
Breaker

sgs Comms Hub
DNP3
Avangrid
ADMS

figure 4. An overview of the distributed node of the ANM Strata platform, connect+, exchanging data with sgs comms hub, and the AVANGRID ADMS.
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Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - May/June 2017