A New Generator Control Device Level Disturbance Source Location Method of Power Oscillation Based on PMU

Guo, Siyuan; Ouyang, Fan; Lv, Fengyi

doi:10.1109/ei247390.2019.9061977

Cited by 1 publication

(3 citation statements)

References 6 publications

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“…Calculation using this method requires values of phase voltages and currents, excitation voltage and excitation current, which can be obtained with PMU. In equations (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16), the derivatives are written in terms of finite differences, and at each step, an optimization problem is solved, where the unknowns determined in the calculation process are the flux linkages of the generator circuits, the currents of the damper circuits, and the load angle of the SG. When using the described method, the calculation starts from the previous steady state.…”

Section:  mentioning

confidence: 99%

“…It is possible to determine whether a specific SG is a source of oscillations, as well as to characterize its quantitative participation in the damping of the LFO, by calculating the values of the synchronizing power or synchronizing energy of the generator [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…To assess the synchronizing power and energy, it is important to have as accurate information as possible about the nature of the change in the load angle during the electromechanical process [10]. Direct measurements of the load angle, as well as synchronized measurements of the SG rotor speed, are almost always unavailable or difficult to implement in practice.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Development of Methods for Calculation the Load Angle of a Synchronous Generator Based on PMU Data

Tepikin¹,

Rafikov²,

Gaydamakin³

2023

E3S Web of Conf.

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The development of the Wide Area Measurement Systems (WAMS) in the Unified Electric Power System (UES) of Russia and using phasor measurement technology (or PMU technology) open up new prospects in the electric power system (EPS) operational dispatch and automatic control. PMU devices installation on synchronous generators (SG) allows to obtain information not only about currents and stator voltages phasors, but also information about the excitation current and excitation voltage. This set of high-precision measurements of the network state parameters, in the presence of generators mathematical models, provides the possibility of calculating such parameters, the direct measurements of which are very difficult. One of these parameters, which can be determined using PMU, is the load angle of the SG (the angle between the generalized voltage phasor and the generator EMF phasor in the dq axis system) in the steady states and transients. The value of the load angle can be used to analyze the static and dynamic stability, as well as to quantify the damping properties of the SG at low-frequency oscillations (LFO) of the power systems electrical parameters. This study analyzes the possibilities for calculating the load angle based on a typical set of generator PMU signals: stator current and voltage vectors, excitation current and voltage. Two methods for calculating the load angle in steady states and transients have been developed and implemented. The first method is based on solving a system of nonlinear algebraic equations, and the basis of the second method is the mathematical model of the SG. The presented methods were tested using the SimInTech software package. Further, using the developed methods, the load angles of two turbogenerators installed at the plants of the Russian UES were calculated according to the PMU data of the parameters of the electromechanical transient process.

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