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Method and equipment for monitoring safety of power cables

A power cable and safety monitoring technology, applied in the field of power cables, can solve problems affecting the continuous operation of wind turbines, loss of wind power generation, shutdown of power generation systems, etc.

Active Publication Date: 2015-01-07
锐源风能技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Although this measure to protect the power cable effectively prevents the power cable from overheating, it directly leads to the shutdown of the entire power generation system, which affects the continuous operation of the wind turbine and brings certain losses to wind power generation.

Method used

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  • Method and equipment for monitoring safety of power cables
  • Method and equipment for monitoring safety of power cables
  • Method and equipment for monitoring safety of power cables

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] refer to figure 1 , a flow chart of Embodiment 1 of a power cable safety monitoring method of the present invention, the method includes:

[0067] Step 101: Receive the ambient temperature signal measured by the first temperature measuring device and the power cable surface temperature signal measured by the second temperature measuring device.

[0068] Wherein, in the technical solution of the application, the first temperature measuring device and the second temperature measuring device may use the same temperature measuring equipment, or may use different temperature measuring equipment. The embodiment of the present application does not limit the specific temperature measuring equipment used by the first temperature measuring device and the second temperature measuring device. Preferably, the above-mentioned first temperature measuring device may be a platinum thermal resistance or an infrared thermometer. The second temperature measuring device may be a platinum ...

Embodiment 2

[0089] refer to figure 2 , a flow chart of Embodiment 2 of a power cable safety monitoring method. Compared with Embodiment 1, the difference is that Embodiment 2 implements periodic monitoring of the power cable through a counter.

[0090] Step 201: Receive the ambient temperature signal measured by the first temperature measuring device and the power cable surface temperature signal measured by the second temperature measuring device.

[0091] In the second embodiment, the first temperature measuring device and the second temperature measuring device transmit the measured temperature signal to the controller through the line in real time.

[0092] Step 202: receiving the trigger signal sent by the counter due to counting overtime, and calculating the safe ampacity of the power cable according to the inverse proportional relationship between the safe ampacity of the power cable and the ambient temperature signal and the surface temperature signal under the trigger of the tri...

Embodiment 3

[0100] refer to image 3 , a flow chart of Embodiment 3 of a power cable safety monitoring method. Compared with Embodiment 1, the difference is that when the current of the power cable is greater than the safe current carrying capacity, Embodiment 3 does not immediately control the torque of the transmitter to change Instead, a timing device is used to time the time when the current-carrying capacity of the power cable is greater than the safe current-carrying capacity. If the time reaches the time that the power cable can withstand, the current in the power cable is adjusted. Frequently controlled engine torque changes cause damage to power generation equipment.

[0101]Step 301: Receive the ambient temperature signal measured by the first temperature measuring device and the power cable surface temperature signal measured by the second temperature measuring device.

[0102] Step 302: Calculate the safe ampacity of the power cable according to the inverse proportional relat...

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Abstract

The invention discloses a method and a piece of equipment for monitoring safety of power cables. The method comprises the following steps: receiving environment temperature signals measured by a first temperature-measuring device and surface temperature signals of the power cables measured by a second temperature-measuring device; calculating the safety carrying capacity of the power cables according to the inverse proportion relationship of the safety carrying capacity of the power cables with the environment temperature signals and the surface temperature signals; and comparing the obtained current signals of the power cables with the size of the safety carrying capacity, if the current signals in the power cables are larger than the safety carrying capacity, transmitting a control signal to a transducer, so that the transducer controls the torque variation according to the control signal to change the generating power to further change the current in the cables. The equipment is a piece of corresponding equipment for implementing the method. The real-time monitoring is realized, and the sizes of the power cables are dynamically changed, so that the safe effective operation of the whole generating system is ensured.

Description

technical field [0001] The invention relates to the field of power cables, in particular to a power cable safety monitoring method and equipment. Background technique [0002] The wind energy content is huge, and the wind energy available in the world is 2×10 7 MW is 10 times larger than the total amount of water energy that can be developed and utilized. Wind power generation is the main form of utilizing wind energy. The wind power drives the windmill blades to rotate, and then the speed increaser is used to increase the speed of rotation to promote the wind turbine to generate electricity, convert the kinetic energy of the wind into mechanical energy, and then convert the mechanical energy into electrical energy. Compared with coal combustion power generation and nuclear power generation, wind power generation does not need to use fuel, and will not produce radiation and air pollution. It is a clean and renewable energy source. Therefore, wind power generation has become...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/418
CPCY02P90/02
Inventor 于建军李红垒曾庆周王沛然李松强
Owner 锐源风能技术有限公司