ABB REB500 REB500sys Digital Substation Protection System

ABB REB500 REB500sys Digital Substation Protection System

Product Overview: The REB500/REB500sys are fully digital protection devices, based on the INX2 and INX5 analogue electronic busbar protection schemes. The compact design, the small number of hardware units, the modularity of the software, the self-monitoring and diagnostics make them suitable for a wide range of busbar layouts and power systems, and they are capable of detecting a wide range of faults and integrating a wide range of optional functions.The REB500sys additionally includes an interval protection function.

Safety instructions: The degree of danger is marked by different symbols, e.g. ‘DANGER’, ‘WARNING’, ‘NOTE’. Emphasis is placed on following the safety rules and operating the equipment only when it is normal and used in strict accordance with the operating instructions, and there are strict requirements for the qualification of the operating and maintenance personnel.

Basic system concept: Introduces the scope of application, system capacity, structural composition (including central unit, interval unit, etc.), hardware modules, software system, signal acquisition and processing, basic functions of self-monitoring and protection system, and busbar protection functions. For example, the system supports up to 60 interval units and 32 protection zones; protection functions are realised through a variety of measurement principles and logic.

Human-machine interface (HMI500): It is used to interact with the protection system, and can realise operations such as checking the measurement status, setting the protection function and configuring the system. It introduces its installation requirements, operation methods, functions of each menu and common error message processing, such as viewing all kinds of measurement data and configuring system parameters through different menus.

Configuration and Setting: system configuration and parameter setting with the help of HMI500, covering equipment activation/deactivation, various equipment parameter changes, binary module configuration, event text setting, interference recorder configuration, etc. It also introduces the calculation and setting methods of system response, busbar protection and other parameters.

Installation and commissioning: including equipment transport, storage and installation precautions, such as grounding, wiring, shielding requirements; a number of checks need to be carried out before commissioning, test and configure the system in accordance with the process, and add or remove intervals also have corresponding operating procedures.

Specification

Hardware Configuration: The central unit is 19’ cased and can accommodate up to 20 hardware modules, including a variety of functional modules, such as Master CPU (500CPU05), Slave CPU (500CPU05), etc. The spacer unit is available in different versions, such as 500BU03, with a variety of measurement and input/output capabilities, and supports redundant power supplies. The spacer units are available in different versions, e.g. 500BU03, with a wide range of measurement and input/output capabilities, and support redundant power supplies.

Electrical parameters: Power supply input voltage range 36V DC - 312V DC, outputs for various standard voltages, CT input supports 1A and 5A rated currents, VT input rated voltage 200V, A/D converter resolution 16Bit, sample rate varies at different system frequencies.

Functional parameters: Supports up to 60 spacers and 32 protection zones. Various protection functions are available, such as busbar protection, circuit breaker failure protection, etc., and each protection function has a corresponding parameter setting range.

Performance Advantages

High reliability: Double independent criteria, i.e. differential current with braking characteristics and directional current comparison, are used to evaluate each phase independently and to distinguish between internal and external faults effectively. Equipped with comprehensive self-monitoring and diagnostic functions, it can monitor the hardware and software status in real time.

Strong adaptability: applicable to a variety of busbar layouts, such as single busbar, double busbar, etc., can adapt to different power system grounding methods, low requirements for CT performance, even if the CT is saturated, it can also operate stably.

Feature-rich: integrates a variety of protection functions, and can also be extended with optional functions, such as voltage measurement interference recorder, independent I0 measurement, etc. Friendly man-machine interface for easy operation and monitoring.

Trial Scenarios

Power substations: Can be used in 50 Hz and 60 Hz medium-voltage (MV), high-voltage (HV) and extra-high-voltage (EHV) substations to provide protection for busbars, lines and transformers.

Railway systems: for railway power supply systems up to 16.7 Hz to ensure a safe and stable railway power supply.

Complex power grids: In complex power grid structures such as bypassed busbars and ‘tandem bus contact’, it can effectively realise the protection function and adapt to different operation modes.