Equivalent locomotive-traction network coupling experiment platform and its test method
An experimental platform and traction net technology, applied in the field of rail transit teaching and research equipment
Active Publication Date: 2019-01-08
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology
[0004] The object of the present invention is to provide an experimental platform for vehicle-network coupling, which can reproduce phenomena such as harmonic resonance, harmonic instability, and low-frequency network voltage oscillations that frequently occur on the railway site, and can simultaneously analyze the locomotive / traction Network impedance frequency characteristics are tested to provide technical support for solving power quality problems in high-speed rail traction power supply systems
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Embodiment 1
[0020] Embodiment 1: adopt as figure 1 In the basic circuit shown, the equivalent traction transformer (200) is a single-phase isolation transformer with an adjustable transformation ratio, and the initial transformation ratio is 1:1; the voltage sensors TV1 and TV2 use Hall voltage sensors, and their model is CHV -50P; the current sensor TA adopts a Hall current sensor, and its model is LA-50P; the rectifier C adopts a single-phase PWM rectifier, and its topology is a two-level or diode-clamped three-level structure; the supporting capacitor is an electrolytic capacitor; The drive and protection circuit Q adopts such as figure 2 The scheme shown, its core part is the KA962 driver chip; the monitoring and control module MC adopts such as Figure 5 The control scheme shown is implemented by using a DSP controller or other microprocessors in actual implementation.
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The invention discloses an equivalent locomotive-traction network coupling test platform and a test method thereof. The phenomena, including harmonic resonance, unstable harmonic wave, low frequency network pressure vibration, and the like, which frequently occur on the railway site can reemerge through the test platform, and meanwhile, the impedance frequency characteristics of locomotive / traction network can be tested and a technical support is supplied for solving the power quality problem of the high-speed rail traction power supply.
Description
Technical field: [0001] The invention relates to the field of rail transit teaching and research equipment, in particular to the vehicle-network coupling experiment platform technology. Background technique: [0002] By the end of 2015, the national railway operating mileage exceeded 120,000 kilometers, ranking second in the world, including 20,000 kilometers of high-speed railways, ranking first in the world. The rapid development of high-speed rail has begun to significantly affect our lives. Not only that, my country's high-speed railway is going to the world and has become an important national business card of China's "going out strategy" and "one belt and one road strategy". It is a great task to ensure the safe and stable operation of such a large-scale high-speed railway. Judging from the operation of high-speed railways in recent years, power quality problems such as harmonic resonance, harmonic instability, and low-frequency network voltage oscillations have been ...
Claims
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IPC IPC(8): G01R27/02G01R31/00H02M7/217
CPCG01R27/02G01R31/008H02M7/217
Inventor 胡海涛陶海东杨孝伟朱晓娟周毅何正友
Owner SOUTHWEST JIAOTONG UNIV