High-Voltage Testing: man-made lightning at the 1939 World's Fair [History

Blalock, Thomas J.

doi:10.1109/mpe.2009.935480

Cited by 3 publications

(3 citation statements)

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“…HV tests are used to determine the dielectric properties such as the dielectric strength, partial discharges, and dielectric losses of MV and HV insulation materials [17]. Power grid HV equipment and their HV testing have a long history of more than one century [18]. Organizations such as IEC and IEEE standardize these test procedures for particular voltage classes.…”

Section: Fundamentals Of Hv Testing Applicationmentioning

confidence: 99%

Design of Integrated Hybrid Configuration of Modular Multilevel Converter and Marx Generator to Generate Complex Waveforms for Dielectric Testing of Grid Assets

Ganeshpure,

Soeiro,

Niasar

et al. 2024

IEEE Open J. Ind. Electron. Soc.

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This article proposes a new configuration of a Modular Multilevel Converter (MMC) and a Marx generator to generate fast-rising impulse waveforms. This new configuration improves the capabilities of the MMC-based high voltage arbitrary wave shape generator to generate fast-rising impulse since the MMC topology faces many inherent limitations. Similar to the conventional superimposed circuit of the AC transformer or DC rectifier circuit with the Marx generator, three hybrid circuits of MMC and the Marx generator are introduced, where the most optimal choice is made considering the practical aspect of testing, such as the size, cost and the preparation time. Then, the detailed analytical study is performed on the Marx generator circuit and MMC circuit, and when both circuits are coupled together to deliver a complete guideline on choosing various system parameters when the impulse wave shape and the load capacitor are given. The concept of this new hybrid configuration is demonstrated with a scaled-down prototype where the impulse with a rise time of 1 µs is superimposed on different arbitrary wave shapes. Similarly, the MATLAB-Simulink simulation model validates the proposed configuration for a 200 kV DC link voltage and 67 submodules with the desired impulse performance.

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Section: Fundamentals Of Hv Testing Applicationmentioning

confidence: 99%

Design of Integrated Hybrid Configuration of Modular Multilevel Converter and Marx Generator to Generate Complex Waveforms for Dielectric Testing of Grid Assets

Ganeshpure,

Soeiro,

Niasar

et al. 2024

IEEE Open J. Ind. Electron. Soc.

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show abstract

“…During these dielectric tests, the equipment insulation behaves electrically as a capacitance [11]. The history of testing power grid equipment spans over a century [12] and is standardized by organizations such as IEC and IEEE for specific voltage classes. As per the standard [13], MV equipment has operating voltage of 1 kV and 36 kV, and they need to be tested for higher voltage of such as 100 kV and 250 kV.…”

Section: Hv Awg Applicationmentioning

confidence: 99%

“…It is related to the slope of the insertion index as T c = a/N . Depending upon the current capability of the HV DC source, the time for charging should be calculated from (12).…”

Section: Stagementioning

confidence: 99%

Demonstration of Scalable Series-Connected Submodule of Modular-Multilevel-Converter- Based Arbitrary Wave Shape Generator Used for High-Voltage Testing From Off-the-Shelf Component

Ganeshpure,

Soeiro,

Gagic

et al. 2023

IEEE Open J. Ind. Electron. Soc.

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To test HV equipment with increasingly complex transients obtained from various power system studies, this article demonstrates a hardware implementation of a Medium Voltage (MV) Submodule (SM) to be used in a Modular Multilevel Converter (MMC)-based High Voltage (HV) Arbitrary Wave shape Generator (AWG). The MV SM is scalable with its own onboard Auxiliary Power Supply (APS), and it is constructed by connecting 3 Full-Bridge SMs in series from the commercially available component. The designed MV SM can be operated for a wide voltage range of 0.8 kV to 2.7 kV to incorporate different test objects ranging from HV insulation material to MV equipment and generate wide output range of 0.12 kV to 1.2 kV. Considering the hardware non-idealities in the APS, gate driver, and switches, the series operation of three SMs is ensured using an arm energy controller. Based on the current-based model of APS, SM capacitance design criteria are updated for variable frequency output waveform, and the minimum DC-link voltage is calculated for the proper start-up of this scalable MMC module. Apart from the variable voltage per SM, the HV AWG application poses different conditions, such as a low value of SM capacitance value and the HV DC sources with a current rating of a few tens of milliamperes. Hence, this paper proposes exclusive design guidelines for the proper start-up, steady-state and shut-down operation of the MMC-based AWG. Additionally, this article dives deeper analytically into the soft start-up algorithm to understand its working principle and to design the average charging current within the limit for any number of submodules of the arm. In the end, their performance is showcased with a single MV SM per arm, operating at a different voltage (0.8 kV to 2.7 kV) and frequency levels (1 Hz to 600 Hz) and generating different wave shapes, such as triangular, sinusoidal with different harmonics and pulse waveforms. Additionally, the Fault Ride Through (FRT) capability is verified for the MMC-based HV AWG.

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Design Trade-Offs of Modular Multilevel Converter-Based Arbitrary Wave Shape Generator for Conventional and Unconventional High Voltage Testing

Ganeshpure

Soeiro

Niasar

et al. 2021

IEEE Open J. Ind. Electron. Soc.

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High-Voltage Testing: man-made lightning at the 1939 World's Fair [History

Cited by 3 publications

References 0 publications

Design of Integrated Hybrid Configuration of Modular Multilevel Converter and Marx Generator to Generate Complex Waveforms for Dielectric Testing of Grid Assets

Design of Integrated Hybrid Configuration of Modular Multilevel Converter and Marx Generator to Generate Complex Waveforms for Dielectric Testing of Grid Assets

Demonstration of Scalable Series-Connected Submodule of Modular-Multilevel-Converter- Based Arbitrary Wave Shape Generator Used for High-Voltage Testing From Off-the-Shelf Component

Design Trade-Offs of Modular Multilevel Converter-Based Arbitrary Wave Shape Generator for Conventional and Unconventional High Voltage Testing

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