Resilient Battery Energy Storage for Renewable-Rich Grids

This article is published by EEPower as part of an exclusive digital content partnership with Bodo’s Power Systems.

A modern utility-scale BESS typically integrates battery modules with Battery Management Systems (BMS), a bidirectional Power Conversion System (PCS), and an Energy Management System (EMS) that optimizes operation and ensures compliance with grid requirements.

Figure 1. Battery energy storage plays a pivotal role in modern power systems when strict requirements are met. Image used courtesy of Bodo’s Power Systems [PDF]

Grid-connected BESS must meet binding obligations for frequency control, voltage support, and ramp-up behavior. In ancillaryservices markets, operators must prove that their systems can reach full active-power output within defined time windows. For example, participation as a frequency reserve may require sub-second response, while manual frequency restoration allows minutes.

Meeting the specified ramp-up speed is both a contractual requirement and a technical safeguard for grid stability; non-compliance risks market exclusion and undermines system reliability. Ensuring predictable, high ramp-up performance becomes a critical design goal and is directly linked to power-electronics capability, built on the solid foundation of a resilient communication network.

Digitalized Communication and Deterministic Control

BESS are scalable systems whose overall power and energy are achieved by multiplying PCS and BMS elements. These components communicate with each other, with the EMS, and with external parties exclusively via IP-based digital communication. As in other parts of the power sector, the IEC 61850 standard is increasingly used to ensure interoperability.

Typical embedded protocols include:

• GOOSE for ultra-fast event messaging for protection
• MMS for supervisory control and configuration

BESS networks, and their connections to external networks with IEDs (Intelligent Electronic Devices) and Power Plant Controllers (PPC), should prioritize traffic. IEC-61850-oriented devices and configurations enable deterministic end-to-end behavior. However, protocols alone cannot deliver fast, coordinated power ramp-up. A consistent supervisory control layer must synchronize responses across the entire BESS.

When the grid operator issues set-points, this controller distributes commands simultaneously to all inverters, preventing uneven responses and potential oscillations. Technically, it requires low-latency communication, secure and fault-tolerant operation, and long-term reliability under demanding conditions, forming a deterministic communication backbone that translates grid signals into synchronized inverter actions and predictable power availability.

Network Resilience and Topology Design

Even with capable power electronics and protocols, ramp-up compliance ultimately stands or falls with the underlying network topology. A single point of failure can add reconvergence delays of seconds, which is enough to miss grid-code windows. Resilient topologies such as Turbo Ring and Turbo Chain provide recovery times under 50 ms, while PRP/HSR enables zero-loss redundancy for seamless communication during faults. These approaches ensure inverter commands and measurements continue to flow, even if links fail while set-points are being executed. Recovery times remain well below expected service intervals (see Figure 2).

Figure 2. Tight time budgets: 1) TSO sends set-point to PPC; 2) PPC configures inverters; 3) System status back to TSO. Image used courtesy of Bodo’s Power Systems [PDF]

Selecting a topology requires balancing cost, scalability, and compliance: Turbo Ring/Chain is a cost-effective choice for PCS networks, while PRP is ideal for zero-switchover redundancy in substations.

Figure 3. The right topology determines achievable recovery times. Image used courtesy of Bodo’s Power Systems [PDF]

Figure 4. MxView with the MxSecurity module helps operators protect their networks. Image used courtesy of Bodo’s Power Systems [PDF]

In all cases, highly available networking is what enables the short ramp-up times demanded by modern ancillary-services markets, turning the network from a passive utility into a strategic enabler of long-term grid stability.

Cybersecurity in BESS Networks

System resilience today is more than robust hardware. Unsecure firmware and software can expose latent vulnerabilities that allow unauthorized access or data exfiltration. For OT engineers and compliance officers, maintaining command and control requires resilient connectivity and a proactive cybersecurity posture. Frameworks such as IEC 62443 and NIS2 guide organizations in embedding security across operational layers.

Moxa supports these standards with the MxView network-management platform and its MxSecurity module. The platform visualizes device-level security configurations and provides actionable recommendations based on Zero-Trust principles, helping teams harden their networks against evolving threats.

Moxa hardware, particularly the EDS-4000, PT, and MDS switch families, also integrates key security features, including:

• Port Rate Limiting & Port Lock to block unauthorized traffic
• Authentication & Trust Access Control to verify and manage access
• Access Control Lists & MAC Sticky to enforce device-specific policies
• SNMP v3 for secure network-management communications

In addition, Moxa’s logging supports forensic analysis and continuous hardening, serving as a reliable basis for security audits and compliance reporting.

Conclusion

Deploying BESS in modern grid infrastructures requires advanced engineering, robust communication protocols, and resilient system architectures. Deterministic responsiveness and high fault tolerance are decisive. Ethernet-based ring and PRP/HSR topologies deliver sub-second recovery in unfavorable cases and, at best, uninterrupted data flow, both essential for grid-code compliance and operational continuity.

Cybersecurity frameworks such as IEC 62443 and NIS2 must be embedded at device and network levels to enable Zero-Trust architectures and proactive threat mitigation. The result is a grid-connected BESS that not only satisfies stringent TSO requirements but also delivers measurable returns.

This article originally appeared in Bodo’s Power Systems [PDF] magazine.