Blocking Device Placement for Mitigating the Effects of Geomagnetically Induced Currents

Zhu, Hao; Overbye, Thomas J.

doi:10.1109/tpwrs.2014.2357213

Cited by 65 publications

(35 citation statements)

References 14 publications

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“…This control circuit is integrated with a series capacitor device that is connected between neutral point-of-power transformers and ground. Furthermore, in [101,189,[227][228][229], mitigation of GIC effects based on operational methods are presented. In [189], an optimal placement technique of GIC blocking devices to minimize the cost of these devices is proposed.…”

Section: Gic Blocking Devicesmentioning

confidence: 99%

“…In [189], an optimal placement technique of GIC blocking devices to minimize the cost of these devices is proposed. In [227], the GIC blocking devices placement problem is formulated based on analytically quantifying the related reactive power losses. This work demonstrates that the effects of the blocking device substantially affect the local transformers.…”

Section: Gic Blocking Devicesmentioning

confidence: 99%

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A Review of Geomagnetically Induced Current Effects on Electrical Power System: Principles and Theory

et al. 2020

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Geomagnetically induced current (GIC) has been a significant concern for the electrical power grid in high latitudes for decades. Its origin starts in the Sun; during extreme space weather, the magnetic field of the Earth varies rapidly. This variation induces electric fields at the Earth's surface and leads to GICs in manmade technologies. Power systems are the most affected by this induced current, which causes halfcycle saturation of power transformers and other issues. Understanding the behaviours and chain effects of this phenomenon is the key consideration in modelling the hazards to technological systems from space weather. In this paper, a comprehensive review of space weather, geomagnetic disturbances (GMDs) and GICs and their impacts on the power systems in both high and mid-low latitude regions is presented. Additionally, we highlight the most commonly used methods to model and calculate geoelectric fields at the Earth's surface and GIC in the power systems with respect to DC and AC analysis. In addition, we have classified the GIC effects on the different power system components. Moreover, the possible solutions and mitigation techniques to eliminate or reduce these effects based on different GIC blocking devices are reviewed in this work. This work provides researchers and power system operators a shortcut road path to understanding GIC phenomena, modelling and calculations, effects, and mitigation of these effects.

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Section: Gic Blocking Devicesmentioning

confidence: 99%

Section: Gic Blocking Devicesmentioning

confidence: 99%

A Review of Geomagnetically Induced Current Effects on Electrical Power System: Principles and Theory

et al. 2020

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“…Two conditions are needed to calculate GIC: a magneticstorm-induced Earth field and grid data. In [14], the complex image method was applied to the calculation of the Earth's electric field. The work in [17] was the first to establish a fast calculation model for an induced Earth electric field by using the plane wave theory and the element current system.…”

Section: ) Gic Model Of a Power Systemmentioning

confidence: 99%

“…A magnetic storm not only has the ''small probability, large scope'' characteristics of ice disasters and other meteorological disasters, such as freezing rain; it also presents a high risk of producing power system cluster damage and a fault chain. This makes it necessary to improve existing power system security assessments and early warning and power failure prevention systems, enhance our understanding of space weather information, and ensure that power regulation personnel create a timely prevention and control plan, evaluate power system failures and disaster processes under the influence of magnetic storm, and provide feasible early warning information and prevention plans [14]. To sum up, in the past research, there is no risk assessment model considering magnetic storm disturbance with quantitative evaluation indexes.…”

Section: Introductionmentioning

confidence: 99%

A Safety Evaluation Method for a Power System Influenced by a Geomagnetic Storm

Shu-ming

Liu

2020

IEEE Access

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Geomagnetic storm disasters have a significant impact on the safe and stable operation of power systems. Serious geomagnetic storm disasters can lead to cascading accidents in power systems, up to and including voltage collapse accidents. Therefore, it is necessary to analyze and evaluate the operational risks of power systems under magnetic storms. Based on the mechanisms of the cascading failures caused by geomagnetic storms, the technical requirements for the power system safety assessment of geomagnetic storm disasters are analyzed, and an evaluation method is proposed. The key problems and evaluation systems to be solved are also discussed in this paper. A simulation method for the interactions between geomagnetically induced currents (GIC) and power systems is proposed, and a simulation is carried out based on MATLAB and the PowerWorld simulation software. The simulation results show that this method can accurately reflect the impact of faults on power systems and their cascading failures. The present research results provide a reference for further quantifying and preventing the power grid risks caused by magnetic storms. INDEX TERMS Geomagnetic disturbance (GMD), geomagnetically induced currents (GIC), risk assessment, hybrid model.

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“…The methods for suppressing DC bias in transformers mainly include mounting a capacitance blocking device (CBD) mounting or resistance current limiting device (RCLD) at the neutral point, current injection, and neutral-point potential compensation. A method for optimizing CBD installation to control the DC bias of a transformer was analysed in the literature [13,14]. The influence of adding a resistance below 10 Ω to the neutral point of the main transformer in stations was discussed by the authors of [15,16], and Dutta and Bhattacharya researched a current injection method through simulation calculations and online monitoring [17].…”

Section: Introductionmentioning

confidence: 99%

Combination Optimization Configuration Method of Capacitance and Resistance Devices for Suppressing DC Bias in Transformers

Wang

Liu

2019

Energies

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The ground current of a high-voltage direct current (HVDC) transmission system can cause DC bias in transformers near the grounding electrode during monopole operations, which affects the alternating current (AC) power system operation. Owing to multiple bias current flow paths, a capacitance blocking device installed at the neutral point of a transformer may increase the DC bias in adjacent transformers, while suppressing the DC current in that transformer. This paper introduces the use of an effective bias current indicator to describe the effect of the grounding current on transformers in a network, considering the wiring characteristics of the autotransformers and the power system topology. Additionally, a combination optimization method for the capacitance and resistance is applied in order to determine the minimum number of installed devices that restrict the maximum effective bias current throughout the network to a permissible range. A genetic algorithm based on an improved roulette selection method is adopted to solve the optimal configuration problem. The method is validated by using a test case based on the Xizhe HVDC transmission receiving-end grid near the Jinsi grounding electrode. The configuration of the capacitance and resistance was optimized by the improved genetic algorithm. This method can achieve the desired level of DC bias management with fewer devices than the conventional method, which verifies the feasibility and superiority of the proposed optimization method.

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Blocking Device Placement for Mitigating the Effects of Geomagnetically Induced Currents

Cited by 65 publications

References 14 publications

A Review of Geomagnetically Induced Current Effects on Electrical Power System: Principles and Theory

A Review of Geomagnetically Induced Current Effects on Electrical Power System: Principles and Theory

A Safety Evaluation Method for a Power System Influenced by a Geomagnetic Storm

Combination Optimization Configuration Method of Capacitance and Resistance Devices for Suppressing DC Bias in Transformers

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