Connection setup with the RTDS simulator and the GTNET-PMUs 

Connection setup with the RTDS simulator and the GTNET-PMUs 

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Conference Paper
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A microgrid is a portion of a distribution network and is commonly designed to operate in parallel with the power grid or autonomously as a power island. Therefore, islanding detection is one of the key aspects of grid connected microgrids. In literature, performances of islanding detection methods are largely tested with offline simulation tools a...

Contexts in source publication

Context 1
... order to investigate performances of PMU based islanding detection schemes, a laboratory scale test setup shown in Fig. 8 is developed with the RTDS simulator. Real The RTDS simulator used in this test setup is equipped with a GTNETx2 TM card, which is basically a network protocol converter [5]. The GTNETx2 card is capable of running two network protocols simultaneously and the PMU protocol can emulate up to 8 PMUs [5]. For the test setup shown in Fig. 8, ...
Context 2
... shown in Fig. 8 is developed with the RTDS simulator. Real The RTDS simulator used in this test setup is equipped with a GTNETx2 TM card, which is basically a network protocol converter [5]. The GTNETx2 card is capable of running two network protocols simultaneously and the PMU protocol can emulate up to 8 PMUs [5]. For the test setup shown in Fig. 8, PMU protocol is selected to run on module A and two PMUs are enabled. P-class PMU algorithm available in the RTDS simulator, at a reporting rate of 60 frames/s is selected for both PMUs as it is preferred for the applications requiring fast responses such as islanding detection [12]. A global positioning system (GPS) clock is used to ...

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... When switching to the islanded mode of operation, a microgrid should take appropriate control actions to maintain its local frequency. This usually involves changing the operation mode of one of its generators from droop control mode to isochronous frequency control mode, upon detection of the islanding [8], [9]. In addition, islanding often causes variations in power flow and voltage profiles within the microgrid. ...
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In recent years, microgrids have become increasingly common in power systems around the world. Microgrids have complex control and operational requirements, thus, a dedicated communication network is often a requisite for its functionality. Due to economic and logistical concerns, it is also desirable to keep the communication system as simple as possible. Among contemporary system automation protocols, the Modbus protocol is generally the simplest one to implement. This paper demonstrates the applicability of Modbus TCP communication in facilitating the control system of a detailed microgrid simulated in a real-time power system simulator. The simulated microgrid exchanges voltage, frequency, power measurements, breaker statuses as well as power set points of generators with a central control location via Modbus protocol, where a control system continuously monitors the microgrid. Control centre issues commands depending on the operating conditions of the microgrid such as to switch the microgrid controls from the grid connection mode to the islanded mode, change the protection relay settings groups and activate a load-shedding scheme. Implementation of relevant microgrid controls and Modbus communications are presented using an example microgrid case with the results obtained.