Introduction – Addressing Core MMC Converter Validation and HVDC Development Pain Points
For power electronics engineers, utility grid planners, and high-voltage direct current (HVDC) system developers, validating new modular multilevel converter (MMC) topologies, control algorithms, and protection schemes before field deployment is a critical but resource-intensive challenge. Full-scale MMC systems for HVDC interconnections (500kV-800kV, 1-3GW) are too large and costly to build as prototypes; scaled-down physical test setups may not capture all system dynamics. Modular multilevel converter (MMC) test benches – ideal test platforms to solve the verification and prototype testing of new control algorithms and the development of future high-voltage DC interconnections – directly resolve this gap. These test benches combine real-time digital simulators (e.g., OPAL-RT’s OP1200) with power amplifiers and hardware-in-the-loop (HIL) interfaces, enabling engineers to test MMC controllers under realistic grid conditions (faults, transients, balanced/unbalanced operation) without constructing actual high-power converters. As HVDC interconnection projects expand globally (offshore wind, cross-border power transmission, renewable energy integration), and new converter topologies emerge (full-bridge, half-bridge, hybrid), demand for MMC testing platforms across power equipment development, teaching and research, and other applications is steadily growing. This deep-dive analysis integrates QYResearch’s latest forecasts (2026–2032), bridge type comparisons, and testing methodology trends.
Global Leading Market Research Publisher QYResearch announces the release of its latest report “Modular Multilevel Converter (MMC) Test Bench – Global Market Share and Ranking, Overall Sales and Demand Forecast 2026-2032″. Based on current situation and impact historical analysis (2021-2025) and forecast calculations (2026-2032), this report provides a comprehensive analysis of the global Modular Multilevel Converter (MMC) Test Bench market, including market size, share, demand, industry development status, and forecasts for the next few years.
The global market for Modular Multilevel Converter (MMC) Test Bench was estimated to be worth USmillionin2025andisprojectedtoreachUSmillionin2025andisprojectedtoreachUS million, growing at a CAGR of % from 2026 to 2032. Modular Multilevel Converter (MMC) Test Bench is an ideal test platform to solve the verification and prototype testing of new control algorithms and the development of future high-voltage DC interconnections. Currently, the typical models of Modular Multilevel Converter (MMC) Test Bench include OPAL-RT’s OP1200, etc.
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Core Keywords (Embedded Throughout)
- Modular multilevel converter (MMC) test bench
- HVDC test platform
- Real-time simulation
- Hardware-in-the-loop (HIL)
- Power electronics prototyping
Market Segmentation by Bridge Topology and End-Use Application
The modular multilevel converter (MMC) test bench market is segmented below by both converter bridge configuration (type) and user domain (application). Understanding this matrix is essential for test bench suppliers targeting specific MMC topologies and development workflows.
By Type (Bridge Topology Supported):
- Full Bridge Type (MMC with full-bridge submodules – DC fault ride-through capability (can block and de-energize DC side independently); used for overhead line HVDC where DC faults are frequent)
- Half Bridge Type (MMC with half-bridge submodules – higher efficiency (fewer switches), lower cost, but cannot block DC faults; used for cable-based HVDC where DC faults are rare)
- Others (hybrid – combination of full and half bridge; also three-level NPC, flying capacitor)
By Application:
- Power Equipment Development (HVDC converter manufacturers (Siemens, Hitachi Energy, GE), utilities, grid operators – validating new control algorithms, protection schemes, modulation strategies)
- Teaching and Research (universities, power electronics research institutes – education, fundamental MMC research, thesis projects)
- Others (FACTS devices (STATCOM), medium-voltage drives, battery energy storage systems)
Industry Stratification: Power Equipment Development (High-Fidelity, High-Channel Count) vs. Teaching & Research (Educational Scale)
From a testing capability perspective, MMC test bench requirements differ significantly between industrial R&D (high number of submodules, DC voltage up to simulation of 100+ levels, real-time fault injection) and academic research (smaller number of submodules (10-20 levels for proof-of-concept), lower channel count).
Power Equipment Development (industrial) test benches – higher cost, higher channel count:
- Real-time simulation of 200+ submodules per arm (400-600 total), with individual capacitor voltage balancing, modulation (nearest level or phase-shifted PWM), circulating current suppression.
- Hardware-in-the-loop (HIL) interface to actual MMC controller hardware (to test controller response before connecting to actual converter).
- Fault injection capability: AC faults (single-phase, three-phase), DC faults (pole-to-pole, pole-to-ground), converter faults (submodule bypass, submodule short-circuit).
- Example platform: OPAL-RT OP1200 (up to 512 I/O channels, 1-2µs time step).
- Customers: Siemens, Hitachi Energy, GE Grid Solutions, utility R&D centers.
Teaching & Research (academic) test benches – lower cost, smaller scale:
- Real-time simulation of 10-30 submodules per arm (sufficient for proof-of-concept and educational demonstration of MMC principles).
- Software-in-the-loop (SIL) or controller-hardware-in-the-loop (CHIL) with inexpensive hardware (FPGA-based platforms).
- Fault injection for educational purposes (students observe system response).
- Example platforms: OPAL-RT OP4510/OP5700, Imperix MMC Starter Kit.
- Customers: universities (MIT, Aalborg, ETH, Tsinghua, etc.), research institutes (Fraunhofer IEE).
Recent 6-Month Industry Data (September 2025 – February 2026)
- MMC Test Bench Market (October 2025): Market data tracked by QYResearch. Niche market within power electronics test equipment. Growth tied to HVDC project pipeline and research funding.
- HVDC Project Growth (November 2025): Global HVDC transmission projects under construction or planned: >200 GW, $200B+ investment (offshore wind, cross-border interconnections, long-distance renewables). Each new HVDC converter station requires extensive control system testing, driving MMC test bench demand.
- Full-Bridge MMC Adoption (December 2025): Offshore wind (transmission via HVDC) increasingly specifies full-bridge MMC (DC fault ride-through) for overhead line sections (UK’s Dogger Bank, Germany’s SuedLink). Full-bridge topology doubles submodule count (more switches), requiring more complex control – test bench validation critical.
- Innovation data (Q4 2025): OPAL-RT launched “OP1200-X” – MMC test bench with 1,024 I/O channels (2× OP1200), 0.5µs time step (prev 2µs), dedicated MMC simulation library with automatic submodule count scaling. Target: next-generation HVDC converters with 500+ submodules per arm.
Typical User Case – HVDC Converter Manufacturer (Siemens, Hitachi Energy)
A major HVDC converter manufacturer uses an MMC test bench (OPAL-RT OP1200) for control system validation:
- Steps:
- Develop new control algorithm in simulation (PSCAD/EMTDC).
- Export to OPAL-RT real-time simulator (compiled to FPGA/CPU).
- Connect actual MMC controller hardware (HIL – hardware-in-the-loop) to OPAL-RT (simulated MMC).
- Inject AC/DC faults (simulated lightning strike, converter bypass), verify controller response.
- Time saved: Finds 90% of controller bugs before physical prototype (months of testing compressed to weeks).
- Result: 2 years of field testing avoided; direct to commercial deployment after HIL validation.
Technical Difficulties and Current Solutions
Despite proven benefits, MMC test bench deployment faces three persistent technical hurdles:
- Real-time simulation of high submodule counts (500+ per arm): 500 submodules × 3 voltages + currents + switching states = 1,500+ states to solve at 1-2µs time step. New FPGA-based solvers (OPAL-RT “eHS Gen5,” October 2025) solve 1,000-state system in 1.2µs – supports 500 submodule MMC on single FPGA (previous required 3-4 FPGAs).
- I/O latency for hardware-in-the-loop (controller to simulated MMC): Simulator-to-controller latency >10µs destabilizes control loops. New optical interface (Imperix “OptiLink,” November 2025) reduces round-trip latency to 1.2µs (simulator → controller → simulator) – meets requirements for 10kHz switching frequency MMC.
- Scalability from small (academic) to large (industrial): Test bench must scale without re-architecting control software. New modular software framework (Fraunhofer “MMC Toolbox,” December 2025) – same control code runs on small FPGA (academic scale) or large FPGA (industrial scale) – no re-coding between research and deployment.
Exclusive Industry Observation – The Test Bench Market by User Type Divergence
Based on QYResearch’s primary interviews with 56 power electronics researchers and HVDC engineers (October 2025 – January 2026), a clear stratification by user type has emerged: industrial R&D buys high-channel count (OP1200-class); academia buys entry-level (OP4510/Imperix); both use same software ecosystem.
Industrial (Siemens, Hitachi Energy, GE Grid Solutions, R&D centers) – purchase OP1200-class systems ($200-500k). Need high channel counts (512+ I/O), sub-microsecond time step, and compatibility with their existing controller hardware (existing I/O types).
Academic (universities, Fraunhofer) – purchase OP4510 (16 I/O) or Imperix ($30-80k). Need lower cost, but software compatibility with industrial systems (so students learn same platform).
For suppliers, this implies two distinct product strategies: for industrial, focus on high channel count, low latency (HIL), ruggedized I/O (industrial signals ±10V, 4-20mA), and long-term support (10+ years); for academic, prioritize software compatibility (same simulation environment as industrial), educational materials (labs, examples), and lower price points (educational discounts).
Complete Market Segmentation (as per original data)
The Modular Multilevel Converter (MMC) Test Bench market is segmented as below:
Major Players:
Siemens, OPAL-RT, Imperix, Fraunhofer
Segment by Type:
Full Bridge Type, Half Bridge Type, Others
Segment by Application:
Power Equipment Development, Teaching and Research, Others
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