WindSun Science & Technology Co., Ltd. (FGI) is a national high-tech enterprise affiliated with Shandong Energy Group, specializing in power electronics energy-saving control technology, and integrating R&D, production, sales and services into a whole. On April 13,2021, FGI went public on The Science and Technology Innovation Board ceremoniously. Stock code: 688663.
In urban rail transit projects, DC-AC variable-voltage variable-frequency transmission is generally used. The braking method of the vehicle is electric braking (regenerative braking) + mechanical braking. In operation, electric braking is the main method, and mechanical braking is the auxiliary. During the operation of the train, due to the short distance between stations, the train starts and brakes frequently, and the braking energy is considerable. According to experience, in addition to a certain proportion of the energy generated by subway regenerative braking (usually 20% to 80%, which varies according to the train operating density and interval distance) is absorbed and utilized by other adjacent trains, the remaining part will be mainly used by the trains. The absorbing resistor is dissipated as heat or absorbed by the absorbing device on the line. At present, the main absorption method of domestic urban rail transit is to use resistance energy consumption absorption device to deal with regenerative energy during train operation, which not only wastes energy, but also increases the burden of air conditioning and ventilation devices in the station, and increases urban rail construction costs and operating costs. If this part of the energy can be absorbed and reused, these problems will be solved. Hybrid type, that is, a combination of energy-feeding type and energy-consuming type, or a combination of other two modes. It not only has the characteristics of energy consumption type stability and small investment, but also has the advantages of energy-feeding type and economical application. FDBL-series products are braking energy absorption devices used in urban rail transit. They are designed with high reliability, easy operation and high performance to meet the needs of users for locomotive feedback energy absorption. Has the following characteristics: Reduce the DC voltage fluctuation range, improve the voltage quality, and stabilize the system voltage. The inverter device adopts redundant design to meet the requirements of high system reliability. Modular design of power circuit, easy maintenance and good interchangeability. It can be used for energy feedback, PWM rectification, and reactive power compensation. One machine has multiple functions. Complete protection functions, with bias voltage, short circuit, overcurrent, overheating and other protections, high operational reliability. When connecting with the system, there is no need to consider the phase sequence of the AC system, and the connection is convenient. The circuit parameters of the inverter device are carefully designed, the heat generation is small, the equipment structure is compact, and the floor area is small. Small maintenance and low operating cost. Can be installed in parallel, easy to expand capacity. Host computer control, easy to install and debug. The high-voltage main circuit and the controller are connected by optical fiber, which is safe and reliable.
System Performance
Product number
FDBL-XXX/XXX-XXX/XXX-KH
rated power
250kW-8000kW
Rated DC voltage
DC750V/DC1500V (optional)
DC no-load voltage
750V series DC800V, 1500V series DC1650V
DC long-term working voltage fluctuation range
750V series DC500～900V, 1500V series DC1000V～1800V
DC side maximum voltage
750V series DC1000V, 1500V series DC2000V;
Start voltage value
750V series DC800V～950V continuously and smoothly adjustable, 1500V series DC1600V～1950V continuously and smoothly adjustable
Rated AC voltage
AC0.4kV/1.18kV/10kV/20kV/35kV optional
Way of working
Intermittent work system, 30 seconds/2 minutes
control method
PWM
frequency
The inverter part automatically tracks the grid frequency on the AC side
Harmonics at rated conditions
≤3%;
control method
PWM (conduction ratio adjustment range 5%-95%
Chopper Module Efficiency
greater than or equal to 98%
Resistance value tolerance
-5%～+7%
Resistor maximum operating temperature
≤300℃
Resistance cabinet cooling method
air cooling
Resistive material
Ni—Cr non-magnetic material, the resistance temperature drift change is small
system response time
≤100ms (from zero to full load)
cooling method
Forced air cooling, fan start is controlled by power unit temperature, fan start target value can be set
Auxiliary supply voltage
DC power supply DC220V/DC110V. AC power supply AC220V/AC380V
working environment
-10～+45℃, the temperature change of the working environment is not more than ±5℃/h, and the maximum relative humidity of the air is not more than 90%.
Altitude
not more than 1000m
Installation conditions
Indoor installation
Dimensions of each power section of the hybrid absorption device
Note: The company reserves the right to upgrade and improve the product, and the product size will be changed without prior notice.
Product Advantages
Advantages: Hybrid type, that is, the combination of energy-feeding and energy-consuming type, or a combination of other two modes. It has characteristics of stability and small investment of energy consumption type, also has advantages of economical and applicable of energy-feed type.
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