WAMPAC-READY PLATFORM FOR ONLINE EVALUATION OF CORRECTIVE CONTROL ALGORITHMS
The motivation to upgrade the traditionally designed and operated electric power systems (EPS) with the state-of-the-art Smart Grid technology is driving the research and industry towards advanced Wide Area Monitoring, Protection and Control (WAMPAC) systems. As the performance of corrective control algorithms is often mission critical, it is prudent to extensively validate the emerging grid-saving applications in a safe and isolated environment before they are implemented in an actual EPS.
To serve this purpose, an experimental platform has been developed at the Delft University of Technology (TUD), as a co-simulation comprising of the Synchronized Measurement Technology (SMT) supported EPS model and the underlying ICT infrastructure in real-time. The WAMPAC-ready platform is used for online assessment and evaluation of emerging closed-loop corrective control algorithms. It is possible to initiate a disturbance in the EPS model and observe how separate components and implemented WAMPAC applications in the closed-loop control chain respond to it and how it affects the overall performance of the WAMPAC system under test.
In order to simulate EPS phenomena, the RTDS® real-time power system simulator, capable of performing electromagnetic transient simulations with a typical 50 µs time step, is used. One of its main benefits is the possibility of HIL performance and compliance testing of devices like PMUs, protective relays, circuit breakers, and control devices under realistic network conditions. Two Phasor Data Concentrators (PDC) are utilised to aggregate and store separate online PMU data streams. The PDCs receive synchrophasor streams from all of the PMUs in the simulation, aligns synchrophasor measurements with the identical time-tags and aggregates them into a single synchrophasor data stream, used further in MATLAB‑based Synchrophasor Application Development Framework (SADF). Additionally, synchrophasor measurements are simultaneously stored in the MySQL database, mainly for the online monitoring purpose and off-line analyses. The accurate time synchronisation between all components is provided by the high-precision GPS Grand Master Clock and distributed via 1PPS, IRIG-B, and IEEE 1588 PTP protocol. As a part of the real-time simulation platform, a web-based online SMT monitoring platform has been in-house developed for the real-time monitoring of grid dynamics. The monitoring platform is mainly used for the online PMU measurements monitoring purposes, abnormal event detection and alarming, line load monitoring, offline analysis and data export.
In order to enable a seamless integration between the SMT‑supported real-time simulation platform and emerging grid-saving algorithms, a MATLAB‑based online Synchrophasor Application Development Framework (SADF) has been in-house developed. It enables a simplified access and usage of the synchrophasor data in the MATLAB programing environment. It is capable of connecting to PMU and PDC synchrophasor data stream compliant with the IEEE C.37.118 protocol in an online fashion.
- The platform:
- M. Naglic, I. Tyuryukanov, M. Popov, M. Van Der Meijden, V. Terzija, “WAMPAC-ready platform for online evaluation of corrective control algorithms”, Mediterranean Conference on Power Generation, Transmission, Distribution and Energy Conversion (MedPower 2016), Belgrade, Serbia, 2016
- The SADF:
Paper under review. The MATLAB code will be available shortly on GitHub for download.