Transient stability enhancement of multi-machine power system by novel braking resistor models

Saluja, Riya; Ghosh, Sagnika; Ali, Mohd. Hasan

doi:10.1109/secon.2013.6567462

Cited by 17 publications

(15 citation statements)

References 20 publications

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“…To the best of our knowledge, the potential of BFCL has not been examined so far in VSC-HVDC to enhance system dynamic performance. Some literatures [43,44] have presented series dynamic braking resistor (SDBR) as a potential solution to limit fault current. In this work, the proposed BFCL for VSC-HVDC systems is compared with SDBR in order to show the effectiveness of BFCL to reduce fault currents and improve system stability.…”

Section: Introductionmentioning

confidence: 99%

Fault Ride-through Capability Enhancement of Voltage Source Converter-High Voltage Direct Current Systems with Bridge Type Fault Current Limiters

Alam

Abido

2017

Energies

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This paper proposes the use of bridge type fault current limiters (BFCLs) as a potential solution to reduce the impact of fault disturbance on voltage source converter-based high voltage DC (VSC-HVDC) systems. Since VSC-HVDC systems are vulnerable to faults, it is essential to enhance the fault ride-through (FRT) capability with auxiliary control devices like BFCLs. BFCL controllers have been developed to limit the fault current during the inception of system disturbances. Real and reactive power controllers for the VSC-HVDC have been developed based on current control mode. DC link voltage control has been achieved by a feedback mechanism such that net power exchange with DC link capacitor is zero. A grid-connected VSC-HVDC system and a wind farm integrated VSC-HVDC system along with the proposed BFCL and associated controllers have been implemented in a real time digital simulator (RTDS). Symmetrical three phase as well as different types of unsymmetrical faults have been applied in the systems in order to show the effectiveness of the proposed BFCL solution. DC link voltage fluctuation, machine speed and active power oscillation have been greatly suppressed with the proposed BFCL. Another significant feature of this work is that the performance of the proposed BFCL in VSC-HVDC systems is compared to that of series dynamic braking resistor (SDBR). Comparative results show that the proposed BFCL is superior over SDBR in limiting fault current as well as improving system fault ride through (FRT) capability.Moreover, VSC-HVDC offers a solution for many problems faced nowadays by power networks such as network congestion, grid reinforcement, multi-terminal DC (MTDC) operation and asynchronous operations of two different grids [10]. Different types of VSC topologies are proposed in the literature [11,12] including two level, three level and multilevel converters for HVDC transmission. Multilevel means more than two voltage levels can be achieved in one phase leg, which reduces the switching times of valve and makes the voltage wave form closer to a sinusoidal curve. Line to neutral voltage waveforms of both two-level and three-level converters with PWM are discussed and compared in [12].However, despite the numerous advantages, VSC-HVDC systems face difficulties in dealing with different grid faults [13]. Fault ride-through (FRT) capability enhancement is one of the main requirements for wind farm-integrated VSC-HVDC systems [14,15]. During system faults, bulk power interruptions must be avoided by keeping the HVDC system energized, otherwise, the system may face serious instability due to this bulk power interruption. Modular multilevel converter-based VSC-HVDC system topologies can provide enhanced fault ride-through capability [16]. In [17,18] FRT capability as well as transient stability improvement have been reported by applying various VSC control techniques. A power synchronization control technique has been proposed in [19] with coordination between wind turbines and HVDC controllers in order to achieve FRT ...

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Section: Introductionmentioning

confidence: 99%

Fault Ride-through Capability Enhancement of Voltage Source Converter-High Voltage Direct Current Systems with Bridge Type Fault Current Limiters

Alam

Abido

2017

Energies

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“…In this work we employed the IEEE-9 bus model which includes nine buses, three generators and three loads. It is a widely used model which is usually employed in the literature [12][13][14]. The respective diagram is shown in Fig.…”

Section: Experimental Set-up and Resultsmentioning

confidence: 99%

Detection of Integrity Attacks in Cyper Physical Systems Based On Reservoir Networks

Ntalampiras

Soupionis²

2015

Proceedings of 2nd International Electronic Conference on Entropy and Its Applications

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This paper presents an anomaly-based methodology for reliable detection of integrity attacks in cyber-physical critical infrastructures. Such malicious events compromise the smooth operation of the infrastructure while the attacker is able to exploit the respective resources according to his/her purposes. Even though the operator may not understand the attack, since the overall system appears to remain in a steady state, the consequences may be of catastrophic nature with a huge negative impact. Here, we apply a deep learning technique and more specifically reservoir networks. They follow the supervised learning principle for recurrent neural networks, while the fundamental logic is to steer a random, large, fixed recurrent neural network with the input signal to the desired direction (class, probability, etc.). Their great advantage is the fact that the only part in need of training is the output layer which is a linear combination of all of the response signals. The experimental platform includes a simulator of both a power grid and a cyber-network of the IEEE-9 bus model. Subsequently we implemented a wide range of integrity attacks (replay, ramp, pulse, scaling, and random) with different intensity levels. A thorough evaluation procedure is carried out while the results demonstrate the detection capabilities of the proposed method in terms of false positive rate, false negative rate and detection delay.

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“…Therefore, we can model every generator in the power system as an agent. The state space equation of one generator iṡ (7) where…”

Section: Multi-agent Modeling Of Power Systemmentioning

confidence: 99%

“…In recent years, the transient stability problem of power systems has attracted much attention [1][2][3][4][5][6]. Generally, power system stability control methods are divided into two categories: active power control [7,8] and reactive power control [1,9]. Active power control is used to balance the power across the transmission lines and suppress power oscillation.…”

Section: Introductionmentioning

confidence: 99%

Multi‐Agent Method Based H∞ Supplementary Turbine/Governor Control to Enhance Power System Stability

Meng

Xiao

Zhang

et al. 2019

IEEJ Transactions Elec Engng

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The stability of a power system has always been of concern. Now, wide-area measurement systems are used widely. In this paper, we focus on supplementary turbine/governor control to enhance the stability of a power system with wide-area measurement information. An H∞ supplementary turbine/governor controller based on the multi-agent method is introduced to enhance power system stability. First, the synchronous generator is modeled as a second-order agent. The information of communication topology and power network topology are used to build the system model and the controller design. Then, a linear output feedback controller is adopted. With a suitable Lyapunov function and by solving the linear matrix inequality, the parameters of the controller are tuned by the H∞ synthesis method. Finally, numerical simulations are presented on a Western Systems Coordinating Council three-generator nine-bus power system, validating the proposed design.

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Transient stability enhancement of multi-machine power system by novel braking resistor models

Cited by 17 publications

References 20 publications

Fault Ride-through Capability Enhancement of Voltage Source Converter-High Voltage Direct Current Systems with Bridge Type Fault Current Limiters

Fault Ride-through Capability Enhancement of Voltage Source Converter-High Voltage Direct Current Systems with Bridge Type Fault Current Limiters

Detection of Integrity Attacks in Cyper Physical Systems Based On Reservoir Networks

Multi‐Agent Method Based H∞ Supplementary Turbine/Governor Control to Enhance Power System Stability

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