Electrified railway is a railway that is mainly traveled by two kinds of railway trains (commonly known as trains) : electric locomotives or EMUs. The traction power of electrified railway is electric locomotive, and the locomotive itself does not carry energy, and the required energy is provided by the electric traction power supply system. Traction power supply system mainly refers to the traction substation and catenary two parts. The substation is located near the railway, and it sends the current from the power plant through the high-voltage transmission line to the contact network over the railway. The stable operation of power supply system in substation directly provides a strong guarantee for the stable operation of electrified railway.

Electrified railway is a kind of railway transportation mode which uses electricity as power energy.

In electrified railways, electricity is delivered to the locomotive through overhead catenary or third rail, etc., to drive the train. Electrified railways have many significant advantages over traditional steam and internal combustion locomotives.

First of all, it has high energy efficiency and can effectively reduce energy consumption. Electric drive systems are often more efficient than internal combustion engines, reducing energy waste.

Second, electrified railways are more powerful and can provide greater traction, allowing trains to run at higher speeds, while also pulling heavier trains and improving transport capacity.

Moreover, it is more friendly to the environment. Reduce exhaust emissions, help improve air quality, reduce environmental pollution.

Electrified railways are also more stable and reliable, reducing the probability of mechanical failure.

In terms of construction, it is necessary to lay power supply facilities such as catenary lines, as well as build supporting substations and power control systems.

However, the construction and maintenance costs of electrified railways are relatively high, and the stability of the power supply is also required.

However, with the continuous progress of technology and the adjustment of energy structure, electrified railway has been widely used and developed in the world, and has become one of the mainstream models of modern railway transportation.

There are two characteristics of power supply used in electrified railway substation: high voltage harmonics and high voltage fluctuation. Conventional power operation power supply is difficult to operate reliably in railway traction substation, our company specially designed and developed corresponding products, to adapt to the electrified railway harmonic voltage environment of high reliability power supply needs to meet the following requirements:
① The power module does not resonate with the station power supply.
② Protect the power module from damage when the resonant overvoltage is caused by external reasons.
③ Safety and life assurance of high frequency harmonic operation of power module devices.
④ AC reliable detection of railway harmonic environment to prevent misoperation and rejection

1. power system design
Adopt multiple redundant power supply architecture, including primary power supply and backup power supply. The main power supply can be mains access, and the backup power supply can be a battery pack or a diesel generator set to ensure continuous power supply in the case of mains failure.
Equipped with high performance power conversion equipment, such as rectifiers and inverters, convert input power into stable DC or AC power suitable for use by railway station equipment.
2. power monitoring and management
Install an intelligent power monitoring system to monitor the voltage, current, power, temperature and other parameters of the power supply in real time, as well as the running status of each power supply device.
Set up an early warning mechanism, when the power parameters out of the normal range or equipment failure, timely alarm and notify the relevant personnel.
Through the remote monitoring function, the centralized management and control of the power system is realized, which is convenient for operation and maintenance personnel to grasp the operation of the power supply anytime and anywhere.
3. Battery maintenance
Use high-quality, long-life batteries, and regularly carry out capacity testing and internal resistance detection to ensure good battery performance.
An intelligent battery management system is installed to optimize the charging and discharging process of the battery and extend the battery service life.
4. Energy-saving measures
Use efficient power supply equipment to reduce energy consumption.
According to the actual load of railway station equipment, reasonable adjustment of power output to avoid energy waste.
5. Emergency treatment plan
Formulate a detailed emergency plan for power failure, and clarify the emergency handling process and division of responsibilities in case of mains interruption or equipment failure.
Emergency drills should be conducted regularly to improve the emergency handling ability of operation and maintenance personnel to ensure that the power supply can be quickly restored in an emergency.
6. system optimization and upgrading
Continue to pay attention to the development of power technology and the updating needs of railway station equipment, and optimize and upgrade the power system in a timely manner.
Periodically evaluate the performance of the power system, and adjust and improve the reliability and stability of the power system according to the evaluation results.