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Inversion feedback type regeneration device simulation method suitable for power flow simulation calculation

A simulation calculation and regenerative device technology, which is applied to circuit devices, AC network circuits, and AC networks with the same frequency from different sources, etc., can solve the problems of inability to accurately simulate the electrical characteristics of inverter feedback regenerative devices, etc. Achieve the effects of strong versatility, simple implementation, and high calculation accuracy

Pending Publication Date: 2021-12-28
CHINA RAILWAY ELECTRIFICATION SURVEY DESIGN & RES INST
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Problems solved by technology

[0013] At present, in the power flow simulation calculation of urban rail transit power supply systems, the generalized load modeling method for inverter feedback regenerative devices is basically equivalent to the model of voltage source plus internal resistance or the model of pure current source, which cannot accurately simulate the equivalent of the inverter. The Complicated Electrical External Characteristics of Variable Feedback Regenerative Device

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  • Inversion feedback type regeneration device simulation method suitable for power flow simulation calculation
  • Inversion feedback type regeneration device simulation method suitable for power flow simulation calculation
  • Inversion feedback type regeneration device simulation method suitable for power flow simulation calculation

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Embodiment Construction

[0042] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0043] An embodiment of the present invention provides a method for simulating an inverter feedback type regenerative device suitable for power flow simulation calculation, including the following steps:

[0044] S1: Establish the main circuit model, such as figure 2 As shown, the main circuit model is formed by parallel connection of two branches, of which branch one is composed of switching elements K 1 , resistance element R , controlled voltage source U iv Formed in series, branch two consists of switching elements K 2 , controlled current source I iv formed in series. The voltage sensor collects the DC grid side voltage of the main circuit model u dc , the current sensor collects the DC grid side input current of ...

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Abstract

The invention provides an inversion feedback type regeneration device simulation method suitable for power flow simulation calculation, and the method comprises the following steps that a main circuit model which is formed by connecting two branches in parallel is established, wherein the first branch is formed by connecting a switch element K1, a resistor element R and a controlled voltage source Uiv in series, and the second branch is formed by connecting a switch element K2 and a controlled current source Iiv in series; a control system calculation unit is established, and calculation of each simulation step length is carried out according to constant parameters set before simulation and the direct current network side voltage udc and the direct current network side input current idc, collected in simulation, of the main circuit model. Complex electrical external characteristics of the inversion feedback type regeneration device are simulated by establishing the universal main circuit model and the control system calculation unit, a converter circuit containing a large number of power electronic devices does not need to be established, the engineering precision requirement is met, and the simulation speed is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of power flow simulation calculation of a rail transit power supply system, and in particular relates to a simulation method of an inverter feedback type regeneration device suitable for power flow simulation calculation. Background technique [0002] At present, most urban rail transit power supply systems use rectifier units to convert electric energy from three-phase alternating current to direct current to power trains. Since the diode rectification circuit of the rectifier unit can only flow energy in one direction, a large amount of regenerative braking energy generated by the train during frequent braking cannot be returned to the upper-level AC network of the power supply system through the rectifier unit. If the regenerative braking energy generated by a train cannot be absorbed by adjacent trains, it will be consumed on braking resistors or brake shoes, resulting in energy waste and temperature ris...

Claims

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Application Information

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IPC IPC(8): H02J3/06H02J3/38
CPCH02J3/06H02J3/38H02J2203/20
Inventor 陈怀鑫肖立君李汉卿李力鹏靳佩跃赵兴华王世峰刘广欢孔清刘芊康克农
Owner CHINA RAILWAY ELECTRIFICATION SURVEY DESIGN & RES INST
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