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Digital-physical hybrid real-time simulation is considered to be an advanced method for future power system simulation. However, the physical interface will inevitably exist DC component, which causes negative effects on practical applications, such as degradation of simulation performance, damage to physical equipment, etc. A novel DC component elimination control strategy for the digital-physical...
The operating point of a power system varies through time due to continuous changes in the system dynamics. These changes might be small disturbances such as a continuous increase or decrease in loads, or severe disturbances such as a generators' trip. These unexpected disturbances will change the power system states including buses' phasor voltages and system frequency; it may also lead to system...
Developing a test environment for smart grid forms an indispensable stage to the realization of the next generation of the electricity grid. The coupling of the physical power system and its associated communication network makes modern power grid a typical cyber-physical system. In this paper, a real-time power system was simulated in RTDS and the communication network in NS-3. This test bed includes...
In order to realize intensive research and analysis of the whole bulk power system, which contains all electronic elements not only includes generator, electronic grid system, but also includes power generation system, based on the thermodynamics and dynamics theory in power generation system and the electromechanical and electromagnetic transient theory in electronic grid system, we established a...
This paper presents a novel methodology based on machine learning for assessing the power system transient stability (TS) in real-time using synchronized phasor measurements as input in order to predict the power system TS status related to the single machine equivalent (SIME) results. Based on the probabilistic models of input parameters, such as load variation and the occurrence of contingencies,...
Reactive power and voltage support is an essential service to ensure secure power system operations. Low voltages in the transmission grid pose threat to operational security of the grid. Certain control areas in the Southern regional grid in India experience severe low voltages during peak demand period. This paper provides an overview of the different methods being used by the grid operator to access...
This paper presents the development of a testbed for tuning the parameters of Power System Stabilizers (PSS). The main tuning methodology comprises the use of the classic Single Machine Infinite Bus (SMIB) model and the phase compensation method along with the modal analysis approach and the application of the Mean-Variance Mapping Optimization (MVMO) algorithm. This methodology is then improved by...
When serious HVDC transmission fault happens, Emergency load shedding measures will be taken. In order to achieve the precise load shedding, it proposes a real-time load control decision technology based on user's interruptible load. Some key technologies involved in the process of control decision are studied just like quick response, precise control, stability control security. Designed the mechanism...
Power-hardware-in-the-loop (PHIL) is a simulation tool that can support electrical systems engineers in the development and experimental validation of novel, advanced control schemes that ensure the robustness and resiliency of electrical grids that have high penetrations of low-inertia variable renewable resources. With PHIL, the impact of the device under test on a generation or distribution system...
Since the first Phasor Measurement Units in Slovenian electricity transmission system operator's (ELES) grid have been put in operation in 2005, the number of installed units has grown considerably. In addition, in recent years, connections have been established with grid operators from Switzerland, Denmark, Italy, Germany, Montenegro and Austria with the purpose of exchanging available measurement...
This paper proposes a method to monitor the impedance-based stability margin of grid-connected converters in real-time. A three-phase converter is configured to inject a broadband perturbation on top of its nominal output current to enable online identification of grid impedance. The ratio of converter and grid impedance is computed in real-time by utilizing the measured grid impedance and the analytical...
This paper presents a framework for real-time contingency screening using a situational awareness oriented tool. While some contingencies might have a significant impact on power-system stability, the impact of others is negligible. The consequences of a contingency depend on network conditions. Therefore, fast and effective tools for rapid recognition of hazardous operating conditions from the stability...
The share of decentralized power generation is increasing, which causes general changes and challenges for the conventional power system. Hence, distribution system operators (DSO) need new technologies to ensure the stability of the entire electrical power system. As a feasible solution for structuring power networks, the Clustering Power System Approach (CPSA) has been introduced, providing an innovative...
Distributed real-time simulation allows the sharing of simulator equipment and components connected in Hardware-In-the-Loop experiments. In this paper, we analyze the challenges of geographically distributed real-time power system simulation and how dynamic phasors could be applied to improve the accuracy of the simulation results for large time steps. The time step is of particular interest since...
The main objective of this paper is to elucidate issues that concern the integration of existing software systems and platforms into an open-source, open-architecture simulation engine that delivers large scale data analytics for the efficiency and stability of next generation power distribution grids. Our objective is achieved through the design and the implementation of a prototype simulation engine...
In this paper, wind speed models are used to consider its variability in real-time voltage stability assessment using Thévenin equivalent methods. A stochastic differential equation was used to produce a set of wind speeds required for the simulation scenarios together with a very short-term forecast based on a probabilistic method, which provides the means for including anticipation in the stability...
Dynamics of distribution grids are becoming more and more complex to analyze due to their transition from passive networks to active ones. This has necessitated the increase of observability between Transmission and Distribution (T&D) grids for operational security and real-time security assessment. This paper presents an overview of the IDE4L project, funded by the European Commission, where...
The majority of recent large-scale blackouts have been caused by voltage instability. A prompt on-line assessment of voltage stability for preventive corrective control of electric power systems is one of the key objectives for Control centers. The use of classical approximation methods alone is complicated. Therefore, several modified methods combined with machine learning algorithms enabling security...
This paper presents a converter-based permanent magnet synchronous generator emulator as a testbed for designing, analyzing, and testing of the generator drive and its control system as an actual device under test. The permanent magnet synchronous generator model is formulated in a real-time digital simulator. A voltage type ideal transformer model combined with a virtual impedance is presented as...
In this paper, recurrent neural networks (RNNs) are used in combination with phasor measurement units (PMUs) to predict the critical clearing time of a multi-machine power system in real-time. RNNs make use of real-time data from Phasor Measurement Unit (PMU). Simulation results are presented to show the effectiveness of the proposed approach in predicting the critical clearing time.
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