Apr 2013
Electricity Transmission
Developments in Protection and Control
Apr 2013
National Grid Electricity System Operator
National Grid TO Innovation Team
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Innovation Funding Incentive
Asset Management
Market driven grid management has increased the number of renewable/distributed generation sources, introduced complexities to address reactive support and progressively stress transmission networks. This has increased the complexity of operation, monitoring, control and protection of large interconnected electric power systems considerably. The penetration of renewable generation is increasing and there are targets set for connection of future renewable sources. At the same time is the asset owner is faced with increasing maintenance and existing asset replacement which will result in reduced circuit availability. These factors will lead to much less predictable operating scenarios and therefore greater dependence on real-time support tools to observe and manage the condition of the network. Specific issues for investigation: Synchronized Measurement Technology (SMT), including Phasor Measurement Units (PMUs) and its applications as an important element and enabler of WAMPAC, voltage instability. Process Bus (IEC61850-9-2) and oscillatory stability.
This combined project covers developments on protection and control in three main areas:

To evaluate the technology, functionality, performance, interoperability and application of Phasor Measurement Units (PMUs). This will involve laboratory scenario testing against a system model and pilot deployment on transmission systems in UK and Ireland to baseline and track current and emerging network stability issues. Units will be supplied and installed by Alliance partners (Areva, Siemens and ABB) at agreed strategic points on National Grid, SP, SSE, NIE and ESBI transmission networks. The data will be collected for research purposes and validated against systems models. The work will support the development of next generation data and communications infrastructures for smart applications.

To evaluate the functionality and performance of IEC61850 process bus based architecture for substation secondary systems.

To improve existing power oscillation detection and give additional oscillation source location information to enable the transmission network to be operated securely at high utilisation. Additional knowledge on windfarm related oscillations.