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Energy feedback control method and energy feedback system

A technology of energy feedback and control method, applied in electric braking system, electric vehicle, parallel feeding arrangement of single grid, etc., can solve the problem of unstable voltage on the grid side of locomotives

Active Publication Date: 2015-01-07
ZHUZHOU ELECTRIC LOCOMOTIVE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, the present invention provides an energy feedback control method and an energy feedback system to solve the problem of voltage instability at the locomotive grid side caused by feeding back all the electric energy generated by braking back to the locomotive grid side in the prior art

Method used

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  • Energy feedback control method and energy feedback system
  • Energy feedback control method and energy feedback system

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Embodiment 1

[0057] see figure 1 , which shows a schematic structural diagram of an energy feedback system provided by the present invention. Wherein, the energy feedback system includes a braking resistor, and the braking resistor is connected in series to the energy feedback system through a switch tube. Preferably, the switch tube in the present invention may be an IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor).

[0058] Also, see figure 2 , which shows a flowchart of an energy feedback control method provided by the present invention, including:

[0059] Step 101, detecting the current voltage of the locomotive grid side, and obtaining the current voltage value of the locomotive grid side.

[0060] Step 102, judging whether the current voltage value of the locomotive grid side is less than the first threshold; if less, perform step 103, and if not, perform step 104.

[0061] In the present invention, the first threshold is a value used to indicate that...

Embodiment 2

[0093] Based on the energy feedback control method provided by the previous invention, the present invention also provides an energy feedback system, such as Figure 5 As shown, it shows a schematic structural diagram of an energy feedback system provided by the present invention, including: a detection module 100 , a first judging module 200 , a second judging module 300 and a control module 400 . in,

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Abstract

The invention provides an energy feedback control method, and an energy feedback system into which a brake resistor is serially connected through a switch tube. The energy feedback control method comprises the following steps: detecting current voltage on a power grid side of a locomotive to obtain a current voltage value on the power grid side of the locomotive; judging whether the current voltage value on the power grid side of the locomotive is smaller than a first threshold value; when the current voltage value on the power grid side of the locomotive is smaller than the first threshold value, controlling the switch tube to keep a disconnected state so as to enable a brake resistor loop including the brake resistor to be in a non-working state; when the current voltage value on the power grid side of the locomotive is larger than or equal to the first threshold value, further judging whether the current voltage value on the power grid side of the locomotive is larger than a second threshold value; when the current voltage value on the power grid side of the locomotive is larger than the second threshold value, controlling the switch tube to keep a connected state so as to enable the brake resistor loop including the brake resistor to be in a working state; when the current voltage value on the power grid side of the locomotive is smaller than or equal to the second threshold value, controlling to regulate the duty ratio of the switch tube according to the first threshold value, the second threshold value, the current voltage value on the power grid side of the locomotive and total brake power. By the energy feedback control method, real-time control over energy fed back to the power grid side of the locomotive is achieved.

Description

technical field [0001] The invention relates to the technical field of energy management of electric locomotives, and more specifically relates to an energy feedback control method and an energy feedback system. Background technique [0002] When the electric locomotive is braking, in order to save energy, a regenerative braking system is usually used, and all the electric energy generated by braking is fed back to the locomotive grid side through the energy feedback system to realize energy recovery. [0003] However, in the actual operation process, sometimes feeding all the electric energy generated by braking back to the locomotive grid side will cause the current voltage of the locomotive grid side to exceed the safe range, resulting in unstable voltage on the locomotive grid side, thus affecting the locomotive electrical equipment, substation and Other locomotives in the same power supply section will cause adverse effects. Contents of the invention [0004] Based o...

Claims

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Application Information

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IPC IPC(8): H02J3/38B60L7/10
CPCB60L7/10H02J3/38
Inventor 廖洪涛王磊李顺陈安俊贺琳
Owner ZHUZHOU ELECTRIC LOCOMOTIVE CO
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