Power Electronics
High-Precision Power Quality Monitoring Terminal
Core Features
● “Dual-brain” architecture, all-around and precise
It integrates a dual-core ARM Cortex-A9 processor and an Artix-7 architecture FPGA. The FPGA handles high-speed, high-precision data acquisition and real-time computation, while the ARM takes charge of complex analysis, display, communication, and system management—delivering performance and efficiency that far surpass traditional solutions.
● Industry-leading measurement accuracy
Supports Class A (highest level) power quality monitoring, fully compliant with IEC 61000-4-30 standards, with measurement accuracy up to 0.1%, capable of detecting even the slightest grid disturbances.
● Panoramic Power Parameter Monitoring
Real-time monitoring of all power quality parameters, including up to the 127th harmonic, interharmonics, voltage swells/dips, short-duration interruptions, flicker, power factor, and unbalance.
● Powerful edge computing capabilities
Power quality reports, event analysis, fault recording, and intelligent early warnings can all be generated locally, significantly reducing the analytical workload at the main station.
● Fully connected industrial internet with all interfaces
It integrates multiple industrial interfaces, including Gigabit Ethernet, RS-485, and USB, and supports protocols such as IEC 61850 and Modbus, enabling seamless integration with Energy Management Systems (EMS) or IoT cloud platforms.
Email: sales@sengkeda.com
Core specification parameters
| Parameter Category | Detailed indicators |
| Main processor | Xilinx XC7Z020-2CLG400I |
| Processing System (PS) | Dual-core ARM Cortex-A9 @ 667MHz |
| Programmable Logic (PL) | 85K Logic Cells (approximately equivalent to 13,300 LUTs) |
| System memory | Onboard 512MB DDR3L |
| Storage | Onboard 8GB eMMC (optional larger capacity) + MicroSD card slot |
| ADC Channel and Accuracy | 16-bit high-precision ADC, 6 channels (3-phase voltage + 3-phase current) for synchronous sampling |
| Sampling rate | ≥ 256 points per cycle (12.8 kHz @ 50 Hz); supports higher sampling rates. |
| Measurement accuracy | Voltage/Current: 0.1% RD, Power: 0.2% RD, Harmonics: ≤1% |
| Follow the standard | IEC 61000-4-30 Class A (highest level) |
| Operating temperature | -40°C ~ +70°C (Industrial-grade standard) |
| Power supply | AC/DC 85-265V wide-range AC/DC power supply |
Interface Information
Measurement and Acquisition Interface (primarily implemented on the FPGA side)
| Interface Type | Quantity/Specification | Function Description |
| Voltage/Current Input | 6-way differential input (Phoenix terminal) | Directly connect to the secondary-side signals of PTs (voltage transformers) and CTs (current transformers). |
| ADC interface | High-speed SPI/Parallel | Control an external 16-bit high-precision ADC chip to achieve synchronous sampling. |
| Synchronized clock | GPS/Beidou Module Interface (PPS) | Receive satellite synchronization signals to achieve microsecond-level precise synchronization among multiple devices, meeting Class A standards. |
| Digital Input (DI) | Channel 4 (Optocoupler Isolation) | Collect switch statuses, alarm signals, and the like. |
Communication and Management Interface (primarily implemented on the ARM side)
| Interface Type | Quantity/Specification | Function Description |
| Network interface | 1x 10/100/1000M RJ45 | Main communication interface, supporting IEC 61850 MMS, TCP/IP, and Modbus TCP. |
| Serial interface | 2x RS-485 (isolated) | Supports Modbus RTU for connecting local display units or third-party devices. |
| Maintenance interface | 1x USB 2.0 OTG | For on-site equipment commissioning, data export, and software upgrades. |
| Wireless extension | Mini-PCIe slot | Scalable 4G or Wi-Fi module for wireless data transmission. |
| Display interface | LVDS or RGB interface | It can be connected to a local touchscreen for real-time data display and operation. |
| Debugging interface | JTAG | For system-level debugging. |
Software and Features
Operating system Runs a Linux-based custom operating system that is stable and efficient.
Core features:
- Real-time monitoring: All electrical parameters (voltage, current, power, power factor, frequency, harmonics, etc.).
- Event Logging: Waveform recording and alarm generation for events such as voltage swells/dips/interruptions, current surges, and frequency fluctuations.
- Advanced Analysis: Harmonics (127th order), Interharmonics, Flicker (Pst, Plt), and Unbalance Analysis.
- Data logging: Generate daily, weekly, and monthly reports on power quality, compliant with national standards.
- Communication protocols: Supports IEC 61850, Modbus, IEC 104, DL/T645, and others.
Cloud platform integration: Supports access to private or public cloud platforms via protocols such as MQTT.
Typical application scenarios
- Grid company: Monitoring and assessment of power quality at substations and key nodes in the distribution network.
- New Energy Power Plants: Assessment of Power Quality and Verification of Governance Effects at Connection Points of Photovoltaic Power Plants and Wind Farms.
- Large-scale industrial enterprises—such as steel, chemical, and automotive manufacturers—monitor power quality to ensure the reliable operation of sensitive equipment.
- High-end commercial buildings: Power quality audits and fault prediction for data centers, hospitals, and airports.
- Rail Transit: Power Quality Monitoring at Traction Substations.
Keywords:High-Precision Power Quality Monitoring Terminal
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