Simplified electric power facility SIPS architecture is shown in Fig. 1. All integrity protection IEDs receive data from primary equipment (current and voltage transformers, circuit-breakers, disconnectors), measurement transducers, protection relays and control devices. Prefault and fault signals from remote facilities are transmitted over power line carrier or over fiber-optic communication channels, deployed with application of AVANT K400 devices. As shown in Fig. 1, local integrity protection IEDs, operating according to internal protection schemes, can provide data to centralized integrity protection devices. For example: TPA-01 device can implement specific protection scheme (out-of-step protection or overvoltage protection) and can generate control signals on circuit-breakers of the specific line. If line has been tripped and TPA-01 device identified that, it generates specific signal for UPAE IED. This signal is a standard UPAE initiation signal. Whether any control signals are generated by UPAE or not-depends on the specific configuration.

SIPS local area network topology is based on two independentEthernet networks. Each network is implemented using industrial managed switches. The following units are parts of the LAN:

  • Local SIPS devices (TPA-01)
  • Pre-fault data sources (for example, measurement transducers, temperature measurement devices, etc.)

SIPS LAN is designed for the implementation of pre-fault data exchange using IEC 60870‑5‑104 protocol over TCP/IP connection. IEC 61850‑8‑1 (GOOSE) is also supported.

It is common to integrate SIPS IEDs in process control systems and this is provided not only for the purpose of transmitting data from these IEDs to higher control levels but for pre-fault data acquisition (from remote facilities). It is recommended to separate process control and SIPS LANs using gateways. SIPS IEDs are integrated in a process control system using IEC 60870‑5‑101 protocol.

Dedicated redundant communication channel is provided for the transmission of control signals from centralized SIPS processing complex to UPAE devices. This communication channel provides data transfer with 64 kBit/s rate.

SIPS IEDs must have 100 % redundancy of input and output circuits, control units and communciation channels between system devices and with adjacent systems.

Figure 1.
Hierarchical SIPS architecture

Hierarchical SIPS architecture