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PPC · BESS & Solar PV

Power Plant Controller (PPC)

A redundant Power Plant Controller that tracks active power, reactive power and cos φ setpoints at the Point of Interconnection with configurable ramp rates per grid code. Three clustered Advantech MIC-770 V3 units with automatic failover keep the plant under control.

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PPC

Redundant Power Plant Controller

The PPC is the on-site brain of every Nexus installation. It runs closed-loop PID control at the Point of Interconnection and reads 7,000+ signals in under 600 ms with 1-second control loops.

It is installed as a cluster of three Advantech MIC-770 V3 controllers with automatic failover and redundant on-site and cloud storage, so there is no single point of failure.

Control modes

  • Active power control with configurable ramp rates
  • Reactive power control for grid stability services
  • Power factor (cos φ) control at the interconnection point
  • Frequency support: FSM, LFSM-O/U, FCR, aFRR, mFRR
  • Voltage control with U-Q droop, tunable per grid code
  • State of Charge management across all containers
  • Grid-forming for black-start and weak-grid operation
  • Clustered hardware with automatic failover
Advantech MIC-770 V3Closed-loop PIDIEC 61850IEC 104 / 101Modbus TCP/RTUMMS & GOOSE

Nexus in depth

Control, architecture, security, markets

Every technical layer of the Nexus platform, from closed-loop grid control to aggregator connectivity.

Power Control Modes

Active Power Control

Tracks a reference value. Negative means absorption, positive means injection, with configurable ramp rates per grid code.

Reactive Power Control

Reactive setpoint tracking with the same absorption and injection logic for grid-stability services.

Power Factor cosφ

Maintains cosφ at the interconnection point by modulating reactive power relative to active output.

Ramp Rate Control

Controlled rate of change for power injection and absorption, configurable per plant and grid code.

Grid Support Modes

Frequency Support

Active-frequency droop on the operator’s P-F curve. FSM for 200 mHz, LFSM-O/U for larger excursions. Supports FCR, aFRR, mFRR services.

Voltage Control

Reactive droop at the POI following a U-Q characteristic, tunable per grid code.

State of Charge Management

Manages SoC bands across all plant containers for optimal battery longevity and availability.

Grid-Forming

Grid-forming capabilities for black-start and weak-grid operation in islanded conditions.

Integration process

How your plant goes live in Nexus

We start from your real equipment, not a generic template.

1

Technical Site Mapping

We document capacity, BMS, PCS, meters, MV/LV, communications, and project obligations on-site.

2

Redundant Controller

We install the clustered PPC Advantech MIC-770 V3 with automatic failover and all field accessories.

3

Protocols & Network

Modbus, IEC 61850, IEC 104/101, MMS & GOOSE in the field and IEC 104 toward HEDNO, with supervision UI.

4

Live Operations & Market

Closed-loop control, live monitoring, alarms, setpoints, and data ready for aggregator workflows from day one.

Why Nexus

Built for BESS and Solar PV

Six reasons operators and aggregators choose Nexus over generic SCADA platforms.

Scalable

Cloud-native fleet management

From one site to a national portfolio — the same platform, the same dashboard, zero reconfiguration.

<600ms

7,000+ signals, 1-second loops

High-speed parallel data acquisition with sub-second response for real-time grid services.

Zero-trust

Enterprise authentication & encryption

Role-based access, encrypted channels, and immutable audit logs across all user and system interactions.

Redundant

Clustered PPC & dual storage

Redundant on-site hardware with automatic failover and dual cloud backup — no single point of failure.

Compliant

Full grid-code & DSO/TSO support

Pre-deployment validation, HEDNO certification, and continuous compliance monitoring built in.

AI/ML

Predictive analytics & fleet insights

Machine learning tools for anomaly detection, performance forecasting, and fleet-wide optimization.

FAQ

Clear answers for BESS and PV owners

The essentials before connecting your station to Nexus or preparing for market-ready operations.

Call an engineerSend email

Battery storage (BESS) and photovoltaics, with or without a data logger — multi-vendor inverters, BMS, PCS, MV/LV, and cooling and fire-suppression subsystems are all supported.

Closed-loop PID for active and reactive power, ramp rate control, power factor (cos φ), frequency support (FSM ±200 mHz, LFSM-O/U), voltage droop, SoC band management, and grid-forming for black-start. All algorithms are configurable per grid code.

Modbus TCP and RTU, IEC 61850, IEC 104, IEC 101, MMS & GOOSE in the field. IEC 104 toward HEDNO for grid operator communication. HEnEx/IPTO data interfaces for market connectivity.

7,000+ signals delivered in under 600ms via parallel connections. 1-second monitoring loops. Redundant on-site PPC with automatic failover and dual cloud storage ensure high availability. All proven in production across 5 commissioned plants.

Nexus is designed to work with every aggregator platform. Setpoints from the aggregator are executed in real-time via the closed-loop EMS. Full HEDNO compliance for DSO/TSO telemetry, and live HEnEx/IPTO data feeds for market operations.

Yes. Nexus is built on a zero-trust architecture with enterprise authentication, end-to-end encryption, role-based access control, and full audit logs.

Contact

Bring your plant into Nexus with RENER ENERGY

Whether you are deploying a new BESS, upgrading an existing SCADA system, or need compliant telemetry for a solar PV plant, our engineers will assess your site and design the right solution.

Location
32 Adrianeiou Street, 11525 Neo Psychiko, Athens