Description

ABB UNS3670A-Z,V2 HIEE205011R0002

1. Basic Information

ABB UNS3670A-Z,V2 (Part No. HIEE205011R0002) is a high-precision measurement interface conversion module dedicated for ABB large generator sets, excitation systems and power measurement and control systems. As an upgraded V2 version of the UNS3670 series, it specializes in isolated acquisition, signal conditioning and high-speed transmission of power system analog signals. It converts analog signals from on-site sensors and transformers into standard control system identifiable measurement data, serving as the core signal acquisition unit for power station excitation regulation, grid connection and grid parameter monitoring systems.

Adopting industrial high-precision AD sampling and full electrical isolation architecture, the module features strong anti-electromagnetic interference, high-speed response, low temperature drift and long-term operational stability, designed for uninterrupted and harsh working conditions in power plants and substations. The V2 version optimizes sampling algorithm and anti-interference circuit, greatly improving high-frequency signal acquisition accuracy and dynamic response. It is fully compatible with ABB excitation control systems, generator measurement and control units and power DCS systems, widely used for new equipment matching, old signal acquisition module replacement and power measurement precision upgrading.

2. Technical Specifications

2.1 Core Functional Features

Product Positioning: High-precision power-dedicated measurement interface conversion module for excitation, voltage, current and power parameter acquisition of generator sets
Hardware Version: V2 upgraded version with optimized high-frequency sampling and dynamic response, higher precision and anti-interference performance than the original version
Core Functions: Analog signal isolation, filtering, shaping, AD conversion and adaptive transmission, eliminating on-site wave interference and signal distortion
System Compatibility: Fully compatible with ABB full-series excitation systems, generator measurement units and power grid monitoring systems
Sampling Performance: High-speed and high-precision sampling mechanism with fast dynamic response to accurately capture instantaneous parameter fluctuations of power grids and units

2.2 Electrical Parameter Specifications

Power Supply: Standard 24V DC industrial power supply, adapting to unified power supply system of power station cabinets and tolerating minor voltage fluctuations
Input Signal Type: Compatible with AC voltage, AC current and DC analog measurement signals of power systems
Output Signal Type: Converts to standard industrial measurement and control signals for main control system operation, regulation and grid connection logic judgment
Electrical Isolation: Full input-output electrical isolation to completely isolate strong current interference, ground potential difference and high-frequency crosstalk, ensuring safe weak-current sampling
Sampling Accuracy: Low temperature drift and high linearity sampling with minimal steady-state error, meeting high-precision requirements of power grid connection and excitation regulation

2.3 Communication & Operation Specifications

Transmission Mechanism: High-speed parallel signal transmission with real-time parameter upload, no data delay or packet loss
Built-in Algorithm: Integrated signal filtering, abnormal rejection and linear compensation algorithms to automatically filter on-site electromagnetic clutter and invalid interference
Protocol Adaptation: Compatible with ABB exclusive power system bus protocol, plug-and-play without complex configuration
Data Synchronization: Multi-channel synchronous signal acquisition and conversion to ensure consistent timing of multi-parameter measurement and control of generator sets

2.4 Protection & Diagnosis Specifications

Power-on Self-test: Automatically detects power loops, signal channels and chip status on power-on, locks output and alarms under abnormal self-test results
Real-time Fault Diagnosis: Continuously monitors signal disconnection, over-range, signal abnormality, undervoltage and chip failure
Multi-protection: Built-in overvoltage, overcurrent, electrostatic and surge protection to withstand instantaneous voltage impact of power systems
Fault Self-locking: Automatically locks signal output under faults to avoid excitation mis-regulation and grid connection failure caused by abnormal data

2.5 Environmental & Physical Specifications

Operating Temperature: -20℃～+70℃ wide industrial temperature range, adapting to closed high-temperature and alternating temperature conditions of power station cabinets
Storage Temperature: -40℃～+85℃ with excellent temperature shock resistance and anti-aging performance
Humidity Range: 5%～95%RH (non-condensing), dust-proof and moisture-proof for humid and dusty power station environments
EMC Performance: Meets high-standard power industry anti-interference requirements, resisting strong magnetic field, frequency conversion and high-voltage equipment electromagnetic radiation interference in power stations
Structural Process: Compact board structure with industrial three-proof coating, vibration-proof and anti-loose for long-term uninterrupted operation of power stations

3. Working Principle

Power-on Initialization & Self-test: After 24V DC power-on, the module automatically completes hardware self-test, channel initialization and algorithm parameter loading, verifies the integrity of all signal loops, and enters standby acquisition state after normal self-test.
On-site Raw Signal Acquisition: Real-time acquisition of raw analog signals such as voltage, current and power of generators and power grids, receiving original measurement data from transformers and sensors.
Isolation Filtering & Signal Conditioning: Realizes strong and weak current separation through high-voltage isolation circuit. Combined with multi-stage hardware and algorithm filtering, it eliminates on-site high-frequency electromagnetic interference, surge clutter and ground crosstalk to restore pure and effective signals.
High-precision AD Conversion & Operation: Converts analog signals to high-speed digital signals, completes temperature drift correction, linear calibration and abnormal data rejection through built-in compensation algorithms, and outputs high-precision standardized measurement data.
Synchronous Signal Transmission & Interaction: Uploads processed accurate power parameters to excitation main control and DCS systems in real time, providing core data basis for excitation regulation, generator voltage stabilization, grid connection synchronization and power regulation.
Full-process Monitoring & Fault Protection: Continuously monitors channel status and signal quality. In case of signal disconnection, over-range or power supply abnormality, it immediately locks output and uploads fault alarms to prevent system mis-regulation caused by abnormal data and ensure the operation safety of generator sets and power grids.

4. Application Scenarios

4.1 Generator Set Excitation Control System

As the core signal acquisition unit of hydraulic and steam turbine generator excitation systems, it accurately collects stator and rotor voltage and current parameters of generator sets, providing high-precision data support for automatic excitation regulation, reactive power compensation and terminal voltage stabilization, ensuring steady-state operation and dynamic voltage regulation accuracy of generator sets.

4.2 Power Plant DCS Measurement & Control System

Suitable for main control DCS systems of thermal power plants, hydropower plants and new energy power stations. It completes isolated acquisition and conversion of power grid and unit power parameters, realizing real-time monitoring, parameter tracing and abnormal early warning of unit operating status to support automatic continuous operation of power stations.

4.3 Unit Grid Connection Synchronization Control System

Provides precise voltage, frequency and phase sampling signals for generator grid connection synchronization devices, ensuring accurate control of phase matching, voltage difference and frequency difference during unit grid connection, eliminating grid connection impact, failure and equipment oscillation faults, and improving grid connection safety and success rate.

4.4 Power Grid Power Quality Monitoring System

Applied in power parameter monitoring of substations and industrial and mining self-provided power stations. It real-timely collects power grid voltage, current, harmonic and fluctuation parameters to provide accurate data for power quality analysis, power grid fault diagnosis and reactive power optimization management.

4.5 Replacement & Upgrade of Old Power Measurement Modules

The UNS3670A-Z V2 upgraded version is fully compatible with old modules of the same model, solving common problems of old equipment such as signal drift, inaccurate sampling, weak anti-interference, high-temperature failure and frequent faults. It upgrades the accuracy and stability of power station measurement and control systems at low cost without modifying system wiring and control logic.