Mixed circuit protection
Synaptec reduces outage and operational costs with the world’s only distributed sensor technology for operators of complex power systems.
Synaptec’s passive sensors are ideal for faulted section identification in mixed or hybrid circuits containing both overhead lines (OHL) and remote cable sections, cable tail ends, or OHL and transformers. Synaptec enables discrete auto-reclose over longer distances, distinguishing overhead from underground faults in millisecond timescales.
Synaptec’s Mixed Circuit Protection (MCP) solution installs easily to deliver reliable and secure faulted section identification in more locations over longer distances than conventional and optical current transducers. For more information, you can read our paper here.
Get in touch
Abdul Rahman Mustapha
Business Development
Prasanta Das
Director Business Development - India & GCC Region
Saul Matthews
VP Global Sales
Underground / overhead line challenges: Why are MCP solutions needed?
- Undergrounding any or multiple parts of a circuit makes protection more challenging
- Protection should distinguish overhead and underground faults to enable auto-reclosing for transient faults, and to block auto-reclose if the faulted section is underground
- Conventional and optical instrumentation lack the range and the ability to instrument multiple remote locations, without significant infrastructure complexity and cost
- Synaptec’s technology enables multi-zone differential line protection along any feeder without traditional infrastructure or challenges with reliability, security, or maintenance
- Travelling wave-based solutions are not suitable for systems with short cable sections (<1 km)
Discretely monitor differential currents on up to 5 cable sections from one system.
Key benefits
- Robust and familiar equipment – The PSC secondary connects to industry-standard CTs while retaining optical isolation
- Safe and simple to install – No fibre wraps, multiplexers or special installation skills required
- No remote infrastructure – No need for civil works to house clocks, control power or data networks
- Reliable – 5P accuracy over -40°C to +80°C with active temperature compensation
- Robust – Immune to fibre disturbance, power outages, electromagnetic interference, or ambient temperature
On-board protection algorithms
Provides both ANSI 50G earth overcurrent and 87L differential current protection logic, depending on operator requirements, to instantly identify faults on the network and inform protection response. Multiple MCP zones can be defined to cater for any circuit configuration.
Digital ready
Compatible with conventional relays and streams both Sampled Values and GOOSE messages for IEC 61850 / IEC 61869 systems.
Download our mixed circuit protection whitepaper
Applications
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Power grids
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