Simultaneous estimation of state variables and network topology for power system real-time modeling

This paper develops a predictive modeling algorithm, denoted as Real-Time Vector Fitting (RTVF), which is capable of approximating the real-time linearized dynamics of multi-input multi-output (MIMO) dynamical systems via rational transfer function matrices. Based on a generalization of the well-known Time-Domain Vector Fitting (TDVF) algorithm, RTVF is suitable for online modeling of dynamical systems which experience both initial-state decay contributions in the measured output signals and concurrently active input signals. These adaptations were specifically contrived to meet the needs currently present in the electrical power systems community, where real-time modeling of low frequency power system dynamics is becoming an increasingly coveted tool by power system operators. After introducing and validating the RTVF scheme on synthetic test cases, this paper presents a series of numerical tests on high-order closed-loop generator systems in the IEEE 39-bus test system.

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Impact of power system network topology errors on real-time locational marginal price

Journal of Modern Power Systems and Clean Energy ◽

10.1007/s40565-017-0280-5 ◽

2017 ◽

Vol 5 (5) ◽

pp. 797-809 ◽

Cited By ~ 4

Author(s):

Dae-Hyun CHOI ◽

Le XIE

Keyword(s):

Power System ◽

Real Time ◽

Network Topology ◽

Locational Marginal Price ◽

Marginal Price

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Real-Time Modeling to Enable Hardware-in-the-Loop Simulation of Plug-In Electric Vehicle-Grid Interaction

Volume 9: 13th ASME/IEEE International Conference on Mechatronic and Embedded Systems and Applications ◽

10.1115/detc2017-67390 ◽

2017 ◽

Cited By ~ 2

Author(s):

Chong Cao ◽

Luting Wang ◽

Bo Chen ◽

Jason Harper ◽

Theodore Bohn ◽

...

Keyword(s):

Power System ◽

Real Time ◽

Electric Vehicle ◽

Power Management ◽

Hardware In The Loop ◽

The Real ◽

System Models ◽

Management Algorithm ◽

Time Modeling ◽

Building Load

Real-Time simulation and Hardware-in-the-Loop (HIL) testing are increasingly adopted by industry for the development and validation of complex systems. This paper presents the real-time modeling and power management of a Vehicle-Grid Integration (VGI) system. The VGI system consists of six AC level 2 Plug-in Electric Vehicle (PEV) charging stations, a Photovoltaics (PV) farm, a commercial building load, and a switch connecting to 240V single phase power grid. PEV charging activities follow the SAE J1772 standard. An energy management algorithm is designed for the VGI system to coordinate the PEV charging with the building load and PV renewable generation. The coordination maintains the power consumption of the VGI system below utility’s demand charge pricing threshold. A real-time power system simulator, Opal-RT, is used in this study. The OPAL-RT system allows users to build detailed power system models using Matlab Simulink/SimPowerSystems and RT-LAB library, and run the models in real-time. The model-based approach enables the integration of power system models seamlessly with the power management algorithm and power electronics-level controllers. The simulation results show that the VGI model emulates the real system well and the coordinated PEV charging helps to balance the power generation and consumption of the VGI system to meet power management requirement.

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Real-Time State Estimation in the Cameroon Power System

ISRN Power Engineering ◽

10.1155/2013/871827 ◽

2013 ◽

Vol 2013 ◽

pp. 1-10

Author(s):

Emmanuel Tanyi ◽

Edwin Mbinkar

Keyword(s):

Power System ◽

State Estimation ◽

Real Time ◽

Ad Hoc ◽

Dynamic State ◽

System State ◽

State Variables ◽

Power System State Estimation ◽

Dynamic State Estimation ◽

Measurement Units

An important tool for the energy management system (EMS) is state estimation. Based on measurements taken throughout the network, state estimation gives an estimation of the state variables of the power system while checking that these estimates are consistent with the measurements. Currently, in the Cameroon power system, state estimates have been provided by ad hoc supervisory control and data acquisition (SCADA) systems. A disadvantage is that the measurements are not synchronised, which means that state estimation is not very precise during dynamic phenomena in the network. In this paper, real-time phasor measurement units (PMUs) that provide synchronised phasor measurements are proposed for integration into the power system. This approach addresses two important issues associated with the power system state estimation, namely, that of measurement accuracy and that of optimization of the number of measurement sites, their location, and the importance given to their measurements on the dynamic state estimation.

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Real Time Modeling and Simulation of Cyber-Power System

Cyber Physical Systems Approach to Smart Electric Power Grid - Power Systems ◽

10.1007/978-3-662-45928-7_3 ◽

2015 ◽

pp. 43-74 ◽

Cited By ~ 5

Author(s):

Ceeman B. Vellaithurai ◽

Saugata S. Biswas ◽

Ren Liu ◽

Anurag Srivastava

Keyword(s):

Power System ◽

Modeling And Simulation ◽

Real Time ◽

Time Modeling

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Graph Computing-based Real-time Network Topology Analysis for Power System

2019 IEEE Power & Energy Society General Meeting (PESGM) ◽

10.1109/pesgm40551.2019.8973614 ◽

2019 ◽

Author(s):

Jiangpeng Dai ◽

Ziyan Yao ◽

Guofang Zhang ◽

Guangyi Liu ◽

Renchang Dai ◽

...

Keyword(s):

Power System ◽

Real Time ◽

Network Topology ◽

Topology Analysis ◽

Graph Computing

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Power electronic converter for photovoltaic systems with the use of FPGA-based real-time modeling of single phase grid-connected systems

Bulletin of the Polish Academy of Sciences Technical Sciences ◽

10.2478/v10175-010-0137-9 ◽

2009 ◽

Vol 57 (4) ◽

pp. 345-354 ◽

Cited By ~ 9

Author(s):

S. Piróg ◽

R. Stala ◽

Ł. Stawiarski

Keyword(s):

Energy Source ◽

Power System ◽

Real Time ◽

Single Phase ◽

Control Algorithms ◽

System Modelling ◽

Photovoltaic Systems ◽

Power Electronic ◽

Time Modeling ◽

Power Electronic Converter

Power electronic converter for photovoltaic systems with the use of FPGA-based real-time modeling of single phase grid-connected systemsThe paper presents a method of investigation of grid connected systems with a renewable energy source. The method enables fast prototyping of control systems and power converters components by real-time simulation of the system. Components of the system such as energy source (PV array), converters, filters, sensors and control algorithms are modeled in FPGA IC. Testing the systems before its practical application reduces cost and time-to-market. FPGA devices are commonly used for digital control. The resources of the FPGAs used for preliminary testing can be sufficient for the complete system modelling. Debugging tools for FPGA enable observation of many signals of the analyzed power system (as a result of the control), with very advanced triggering tools. The presented method of simulation with the use of hardware model of the power system in comparison to classical simulation tools gives better possibilities for verification of control algorithms such as MPPT or anti-islanding.

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