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The auxiliary line loss management system in Hebei grid is developed. The data of system are taken from EMS. After getting data from EMS, state estimation will be carried out periodically. The ground state of power flow is from the results of state estimation. The hardware configuration of system is introduced. A data receiving server is configured to receive model, graphic and data in auxiliary line...
This paper describes a laboratory setup as the scaled model of a three substation power system. The scaled model has been developed at the Power System Control and Automation Laboratory of Georgia Institute of Technology. Elaborate physical models for the power system components along with high fidelity models for signal generation and interfacing to the laboratory setup are among its unique features...
This paper describes the implementation, testing, and performance of phasor measurements in an industrial state estimation at the New York Power Authority (NYPA). Phasor Measurement Units (PMU) with GPS synchronization were incorporated into the data acquisition subsystem of the Energy Management System (EMS). The modified state estimator was subjected to pre- and post-field installation testing....
This paper presents a two-level state estimation methodology intended to integrate in a simple and efficient manner the results provided by local estimators, handling measurements at the substation level, within the framework of existing EMS. This leads to a paradigm in which raw measurements are locally pre-processed by a linear estimator, in such a way that only a manageable subset of measurements...
Energy Management Systems (EMS) play the all important role of monitoring and control of the power systems and state estimation forms its backbone. In these days of increased operation of power system near to its limits and the tendency to utilize the grid to its full potential, monitoring and control with high level of accuracy becomes a boon. Dynamic state estimation (DSE) techniques with their...
The real-time voltage stability analysis (RTVSA) project is slated to be a part of the suite of computational tools needed for congestion management in the California ISO (CAISO). This is because the problems of voltage stability will be magnified by the effects of multi-transfers through the network. These simultaneous transfers are manifest due to the buying and selling of electric power when the...
This paper presents a cost effective approach, using special-purpose hardware implemented using field programmable gate arrays (FPGA) - commodity programmable hardware, to accelerate the performance of key components of an energy management system (EMS). These components include state estimation, optimal power flow, and load flow computation. All of these components have at their core the solution...
The power system state is more complex than before. It brings more data and information, which made traditional display not satisfied. To solve the problems of difficulty and low efficiency of information display in energy management system (EMS) , a new concept about display of power system state is presented in this paper - coupled multi-screen display. Its kernel is the coupled and associated relation...
Rigorously speaking, power systems state estimation (SE) results aim at allowing the operator to take decision in order to assure network security. Therefore, in order to assure reliable information, SE results must be obtained through a very robust algorithm. In this work, the algorithm employed to solve the state estimation problem is based on the orthogonal iteratively re-weighted least-squares...
In this paper, a wide area monitoring system (WAMS) for the 420 kV Norwegian bulk transmission grid has been evaluated. The robustness of the PMU measurements has been demonstrated by a direct comparison of phasor information from the PMUs and a state estimator (EMS). The paper highlights benefits of both off-line and on-line WAMS applications: a method for real-time detection of power oscillations,...
Ontario market system created more stringent requirement on state estimator that support not only the traditional EMS operation but also the real time and pre-dispatch market operations. This paper describes the key requirements for a state estimator in the market environment, functional enhancements implemented to achieve 99.6% availability, and operational experience with the state estimator software
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