The fault recording system is intended for measuring, computing, archiving and supplying electrical parameters of electrical installations in the normal operation and emergency modes. This information`s analysis allows to identify an emergency`s cause, assess the correctness of operation of relay protection and SIPS devices, and develop a set of measures to prevent any further development of the emergency mode.

Information from the fault recording system is used at the level of the facility where it is implemented within the context of operation of electrical installations being supervised and at the level of the System Operator within the context of investigation of any emergency events that occur.

Fig. 1 shows a typical block diagram of the emergency event recording system (fault recording system) of a power generating company.

The fault recording system comprises the following principal components:

  • RES-3 fault recorders
  • Fault recording system server
  • Fault recording systems local area network
  • Universal time system

The RES-3 recorder is a microprocessor-based device that has a modular structure. The type and range of its modules is determined at the engineering stage in accordance with the technical requirements of the facility where it is meant to be implemented. RES-3 are installed in premises intended for installation of relay protection devices: relay cabinet / room (RCab) or main control cabinet / room (MCCab). Analog circuits of RES-3 (TI) are wired to measuring voltage and current transformers (VT and CТ), external measuring transducers.

RES-3 registers binary signals (TS, TE) received from relay protection and automation devices, from cabinets for SIPS of electrical equipment, directly from the switching equipment (SE), and from the emergency signals and commands transmission devices. The RES-3`s activation for obtaining oscillograph records of electrical parameters of an emergency mode is effected on the basis of variation of values of analog input signals compared to the setpoint, and of variation of status of one or several binary input signals.

Types of data that RES-3 uses for data presentation:

  • Instantaneous values of analog and binary signals with a sampling frequency of up to 2000 Hz per channel – for taking oscillograph records of regular and emergency modes
  • Effective values at the power line frequency period – to serve as replacement data for the TDE SO hardware and software complex

The fault recording system server is a computer or server running the Microsoft Windows (Server) operating system.

The fault recording system server`s principal functions are as follows:

  • Supplying of electrical parameters of normal operation modes of electrical equipment under OPC DA or IEC 60870‑5‑104 network protocols
  • Storage and transmission of electrical parameters of electrical equipment`s emergency modes under the FTP network protocol with a safekeeping period of up to 3 years
  • RES-3 recorders' configuration files.

The RES-3 recorders and the fault recording system server are combined into an fault recording process LAN based on the TCP / IP protocol stack. In order to interface the fault recording system LAN with LANs of third-party automated data systems of the facility where it is to be implemented the of virtual LAN (VLAN) technology is used.

The universal time system supplies the RES-3 with accurate time stamps for recording the electrical parameters with an accuracy of at least 1 ms. This property allows to analyze information from several RES-3s not just from the same facility, but even from RES-3s of different facilities.

Additionally, the fault recording system includes an operator workstation (WKS) running the SignW application. The workstation is used to configure and diagnosticate the operability of the fault recording system, and communicate the captured parameters.

Diagram of the fault recording