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.
The energy consumption type, that is, the resistance absorption device, works on the principle that when the DC voltage rises to the set value due to the regenerative braking of the train, the equipment is started, and this part of the energy is consumed to the resistance, thereby stabilizing the voltage of the DC traction network.
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; 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; 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; Complete fault monitoring circuit, fault data upload function; excellent performance and price ratio.
System Performance
Product number
FDBL-XXX-XXX-H
rated power
200kW-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
Way of working
Intermittent working system, 20s/120s
control method
PWM (conduction ratio adjustment range 5%~95%)
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
noise
≦80dB
Resistance box
The stainless-steel cabinet is adopted, and the shell is sturdy and beautiful; the cabinet is equipped with a temperature sensor to realize over-temperature alarm and tripping
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 energy-consuming absorption device (excluding resistance)
Rated capacity (kW)
Voltage class (V)
Dimensions
Length (mm)
Height (mm)
Depth (mm)
Below 4000
DC750
1400
2300
1200
Below 4000
DC1500
1400
2300
1200
3000-8000
DC1500/DC750
1500
2300
1300
Note: We company reserves the right to upgrade and improve the product, and the product size will be changed without prior notice.
Product Advantages
The energy consumption type, that is, the resistance absorption device, works on the principle that when the DC voltage rises to the set value due to the regenerative braking of the train, the equipment is started, and this part of the energy is consumed to the resistance, thereby stabilizing the voltage of the DC traction network.
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