State space relay modeling and simulation using the ElectroMagnetic Transients Program and its transient analysis of control systems capability

Domijan, A.; Emami, Melikasadat

doi:10.1109/60.63142

Cited by 15 publications

(6 citation statements)

References 2 publications

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“…Although this is not a firm scientific evidence it is an indication of suspicious operation. 3. The interest in modeling other electromechanical relays is high.…”

Section: Computer Representation Of Overcurrent Relaysmentioning

confidence: 98%

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Transient modeling of electromechanical relays

Glinkowski

Esztergalyos

1996

IEEE Trans. Power Delivery

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Part 11: Plunger Type 50 Relays Jules Esztergalyos Bonneville Power AdministrationPortland, OR Abstruct -Electromechanical, plunger type 50 relay is modelled in EMTP/ATP using TACS. Mechanical magnetic, and electrical characteristics are represented in the form of simple mathematical models that can provide a useful tool for studying the dynamic responses of the Type 50 devices and incorporating them into a power system transient analysis. This paper is the second part of a summary report by Rensselaer Polytechnic Institute (RF'I) of work on relay modeling sponsored by the Bonneville Power Administration (BPA). Part I1 presents the Electro-Magnetic Transient Program/Alternative Transient Program (EMTP/ATP) model for plunger type 50 instantaneous overcurrent relays that compare with actual tests performed on the devices on a Power System Simulator (PSS) [l].

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“…Although this is not a firm scientific evidence it is an indication of suspicious operation. 3. The interest in modeling other electromechanical relays is high.…”

Section: Computer Representation Of Overcurrent Relaysmentioning

confidence: 98%

“…Such a near miss could not have been observed from the "go, no-go" type of observation which is all that is possible with actual relay tests such as illustrated in Figure 9. 3. Can the authors explain why for the simulation of Figure 12, contact movement appears to start later than for the simulation of Figure 13?…”

mentioning

confidence: 92%

Transient modeling of electromechanical relays

Glinkowski

Esztergalyos

1996

IEEE Trans. Power Delivery

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“…The specific details for a given relay may be different but the models shown here can be modified using the theory presented. Typical parameters that define relay performance are taken into account, with the understanding that the working range of time scale (slower than 60 H5) allows simplifications which would be intolerable when studying electromagnetic transients and/or harmonic effects [15,16,17]. Hence, in studying transient stability, the dynamic behavior of electromechanical relays can be described using the phasor state variables since the design of these relays is such that the movable element is mostly dependent on the 60 Hz component of the input quantity [18- One of the most common elements employed in protective relays is the level detector.…”

Section: General Remmrksmentioning

confidence: 99%

Modeling the protective system for power system dynamic analysis

Pérez

Flechsig

Venkatasubramanian

1994

IEEE Trans. Power Syst.

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Mathematical models for power system dynamic analysis including the dynamics of the protective system are presented. The formulation of the equations is based on establishing explicit relations between the protection system and the rest of system dynamic elements through the node admittance matrix Ysus.This relationship is achieved by representing the circuit breakers of interest as part of the transmission network elements. The protective relays, reclosing relays and circuit breakers are modeled as dynamic devices for tracking the dependence of these devices on the voltage and current inputs using the phasor state variables. A simple example illustrates the concepts. As a direct consequence of the analytical model, the concept of a protection success region is introduced and the implications for stability analysis, relay coordination, adaptive relaying and cascade tripping are discussed.The objective of the electric power system is to generate and to distribute power to its customers in a 1) stable (sustaining small disturbances), 2) viable (currents, voltages, angles and frequencies within tolerances) and 3) optimal fashion (economy): For this operation to be secure, it is also necessary that the system can withstand certain major disturbances such as line faults or sudden loss of equipments without severe consequences. This motivates the notion of transient stability which is essentially the ability of the system operation to recover its stable operating point without major break-ups after a specified set of first contingencies. The system, with suitable degrees of local stability, viability and transient stability, can then be considered to be secure and additional conditions on optimality imply economic operation [I]. The evolution of system operation after major disturbances such as faults depends on the interaction b e tween two principal factors, namely the protection subsystem consisting mainly of relays and circuit breakers 94 WM 191-7 PWRS by the IEEE Power System Engineering Committee of the IEEE Power Engineering Society for presentation at the IEEE/PES A paper recommended and approved and the dynamics governed by generators, loads and control devices. The operating time of the system protection is typically in the range of 3-10 cycles [2] and the variation of the voltage and current magnitudes caused by system dynamics during this period can usually be ignored from the system protection view-point. However there are circumstances when the relay operation can be much slower (such as the second and third zones of distance relays) where the system dynamics has a direct role to play. The system protection is designed 1) to protect the system components such as lines and machines from excessive currents or voltages and 2) to selectively isolate the "faulty" portion of the system from the rest so that the fault can be cleared for resumption of normal service. Setting the relay parameters for proper detection and clearing of faults is a complex operation in general and typically relay coordination is based...

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“…• Reproduction of processes in electromechanical, induction and electronic relays using a system of algebraic and differential equations [12,13]. Detailed mathematical models of these relays individually are known and available in open sources.…”

Section: Introductionmentioning

confidence: 99%

Detailed simulation of distance protection for its testing and setting

Ruban

Andreev

Ufa

et al. 2018

Journal of Electrical Engineering

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A significant part of severe accidents (blackouts) in electric power systems (EPS) is associated with incorrect operation of relay protection and automation (RPA). One of the main reasons for the incorrect actions of the RPA devices is its rough settings, which often does not correspond to the real operating conditions for specific device. An analysis of currently used methods and tools for RPA setting up, shown that they are largely relied on the guidelines of previous decennaries. Respectively modern techniques have the same drawbacks associated with accounting the processes in specific RPA and primary transducers and its errors by approximate coefficients. It is possible to solve the indicated problem with a highly detailed analysis of the operation of key elements of RPA schemes in the specific operating conditions. The obtained results allow to estimate the processes in protected objects, processing errors in instrumental current (ICT) and voltage (IVT) transformers, as well as in RPA itself. Such possibility could be achieved by the detailed RPA mathematical modeling. The combination of an adequate EPS simulator and RPA models allows configuring parameters of the RPA settings ensuring its correct operation in real EPS. The article presents result of this research for distance protection

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State space relay modeling and simulation using the ElectroMagnetic Transients Program and its transient analysis of control systems capability

Abstract: A simulation of a MHO distance relay is developed to study the effect of its operation under various system conditions.

Cited by 15 publications

References 2 publications

Transient modeling of electromechanical relays

Transient modeling of electromechanical relays

Modeling the protective system for power system dynamic analysis

Detailed simulation of distance protection for its testing and setting

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