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Train based on virtual synchronous generator technology uninterrupted phase-separation passing study

Wang Ying, Yang Huan, Chen Xiaoqiang, Guo Ya

Archives of Electrical Engineering

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2023

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Vol. 72, nr 3

755--768

EN

The problem of large speed loss exists in the traditional passing through the electric phase-separation method of trains, which is more prominent when trains pass through an electric phase-separation zone in the uphill section of long ramps and may lead to the trains not passing through the phase-separation zone safely. In order to solve this problem, based on the energy storage type railroad power conditioner, a train uninterrupted phase-separation passing system based on the energy storage type railroad power conditioner is proposed. The energy storage railroad power conditioner can realize the recovery and utilization of regenerative braking energy of the electrified railroad. In the structure of the energy storage railroad power conditioner, the single-phase inverter is led from the middle DC side of the energy storage railroad power conditioner and connected to the neutral line through the LCL filter and the step-up transformer, which constitutes an uninterrupted phase separation passing system. The single-phase inverter is controlled using virtual synchronous generator technology, which allows the single-phase inverter to have external characteristics similar to those of a synchronous generator, providing support for the voltage and frequency in the neutral zone. The power required by the train to pass the electric phase-separation is provided by the power supply arm or the energy storage system, which not only improves the utilization rate of regenerative braking energy but also realizes the uninterrupted phase separation passing of the train through the control of the voltage in the neutral region.

2

The Guaranteed Power Supply System on the Base of Alternative and Renewable Energy Sources

Abramovich B. N., Sychev Y. A., Fedorov A. V.

Electrical Power Quality and Utilisation. Journal

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2015

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Vol. 18, iss. 1

1--6

EN

The necessity of developing and implementation of the guaranteed power supply system using distributed generation on the base of alternative and renewable energy sources is proved in conditions of responsible technological processes. The theoretical and experimental researches were made in raw mineral enterprises, which have a great amount of responsible technological consumers. The permitted duration of power supply interruption for responsible consumers of continuous technological processes of raw mineral industry is determined. The effectiveness of distributed generation using for guaranteed power supply mode is shown. The reasonability of solar, wind and followed oil gas energy applying in role of power sources for distributed generation is also proved in the paper. The basic variants of guaranteed power supply system structure are described and offered in the paper for all kind of industry and technique, especially for responsible digital control systems and telecommunications.

3

Bezpieczny Mikrosterownik Logiczny dla systemów krytycznych

Sałamaj M., Kujawa K.

Pomiary Automatyka Kontrola

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2014

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R. 60, nr 11

1037--1040

PL

Artykuł przedstawia tematykę związaną z projektowaniem nowego układu bezpiecznego, który w przyszłości zdolny byłby nie tylko do bezpiecznego i precyzyjnego zarządzania określonymi systemami krytycznymi ale również rozwiązaniami uniwersalnymi. Prezentowane wyniki badań obejmują propozycję nowej koncepcji układowej Bezpiecznego Mikrosterownika Logicznego (BML) w zakresie dywersyfikacji jego rozwiązań, które przeprowadzono z użyciem jak najprostszych mechanizmów oraz rozwiązań technicznych. Tego typu podejście pozwoliło na otrzymanie prostego i bezpiecznego mikrosystemu decyzyjno-sterującego, w którym zastosowane mechanizmy oraz rozwiązania zwiększyły bezawaryjność oraz niezawodność jego funkcjonowania. W rezultacie, tak zaproponowana jednostka sterująca okazała się rozwiązaniem jak najbardziej uniwersalnym, która może być stosowana do zarządzania dowolnym systemem krytycznym jak również (w miarę postępu technologicznego przy jednoczesnym spadku cen rozwiązań technicznych) dowolnym uniwersalnym systemem czasu rzeczywistego.

EN

The article presents the issues related to the design of a new safety unit, which in the future would not only be able to manage certain critical systems safely and accurately but also universal solutions. The research results presented include a proposal for a new systemic concept of a Safety Logical Microcontroller (BML), concerning the diversification of its solutions, which was carried out using the simplest mechanisms and technical solutions. This approach allowed to obtain a simple and safe decision-making and control microsystem, in which the applied mechanisms and solutions increase reliability of its operation. As a result, the proposed control unit has proved to be the very universal solution, which can be used to manage any critical system as well as (as technology advances with the simultaneous decrease in the price of technical solutions) any universal real-time system.