CN203054144U - Range unit for measuring short circuit of transmission line - Google Patents
Range unit for measuring short circuit of transmission line Download PDFInfo
- Publication number
- CN203054144U CN203054144U CN 201220665513 CN201220665513U CN203054144U CN 203054144 U CN203054144 U CN 203054144U CN 201220665513 CN201220665513 CN 201220665513 CN 201220665513 U CN201220665513 U CN 201220665513U CN 203054144 U CN203054144 U CN 203054144U
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- range unit
- transmission line
- converter
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Abstract
The utility model discloses a range unit for measuring short circuit of a transmission line. The range unit comprises a current transformer, a signal conditioning circuit, an A/D converter, DSP, a power switching circuit, a power supply and a PC, wherein the current transformer is connected with the A/D converter through the signal conditioning circuit, the A/D converter is connected with DSP, the DSP is connected with the PC, and the power supply is connected with the DSP through the power switching circuit. The range unit is rapid in data acquisition and high in analog-to-digital conversion precision. When a power transmission cable fails, the range unit can rapidly and accurately capture transient traveling wave signals, record, analyze and process the fault information and timely and accurately locate fault. As DSP technology gradually applies in the transient signal analysis and processing in power systems, the range unit shows excellent use value and economic benefit.
Description
Technical field
The utility model belongs to the electric circuit inspection field, is specifically related to a kind of distance measuring equipment of power transmission line short trouble.
Background technology
Short trouble is one of most common failure of transmission line of electricity, if can not in time detect and get rid of, will cause very serious economy loss and personnel's injury.Utilizing traveling wave method to find range, is electric system method commonly used, but because the row velocity of wave propagation is very fast, no better than the light velocity.Work such as the monitoring of signal, analyzing and processing, control, transmission when therefore, designed range measurement system must be finished in the very short time fault taken place.Considering in the present cable traveling wave fault location system to have the low problem of precision, is target with speed and the precision that improves localization of fault, and it is very important designing a kind of power transmission line short trouble distance measuring equipment.
Summary of the invention
At the deficiency that prior art exists, the purpose of this utility model is, a kind of distance measuring equipment of the power transmission line short trouble based on DSP is provided.
In order to realize above-mentioned task, the utility model adopts following technical scheme to be achieved:
A kind of distance measuring equipment of power transmission line short trouble, comprise current transformer, signal conditioning circuit, A/D converter, DSP, power-switching circuit, power supply and PC, wherein, current transformer links to each other with A/D converter by signal conditioning circuit, A/D converter links to each other with DSP, DSP links to each other with PC, and power supply links to each other with DSP by power-switching circuit.
The utility model also has following technical characterstic:
Described current transformer adopts the HCT217AC current transformer.
Described DSP adopts the TMS320VC5507 chip.
Adopt the TPS70202 power conversion chip in the described power-switching circuit.
The utlity model has fast data collection and higher A/D conversion accuracy, when the transmission of electricity cable breaks down, can capture the transient state travelling wave signal rapidly and accurately, and can accurately record, analyze and handle these failure messages at a high speed, thereby can carry out localization of fault timely and accurately.Be accompanied by the deep application of DSP technology in the electrical power system transient signal analysis and processing, the utility model will show good use value and economic benefit.
Description of drawings
Fig. 1 is annexation synoptic diagram of the present utility model.
Fig. 2 is signal conditioning circuit figure of the present utility model.
Fig. 3 is power-switching circuit figure of the present utility model.
Below in conjunction with drawings and Examples particular content of the present utility model is done explanation in further detail.
Embodiment
Below provide specific embodiment of the utility model, need to prove that the utility model is not limited to following specific embodiment, all equivalents of doing on present techniques scheme basis all fall into protection domain of the present utility model.
Defer to technique scheme, as shown in Figure 1, a kind of distance measuring equipment of power transmission line short trouble, comprise current transformer, signal conditioning circuit, A/D converter, DSP, power-switching circuit, power supply and PC, wherein, current transformer links to each other with A/D converter by signal conditioning circuit, and A/D converter links to each other with DSP, DSP links to each other with PC, and power supply links to each other with DSP by power-switching circuit.
The utility model also has following technical characterstic:
Described current transformer adopts the HCT217AC current transformer, is connected in the power transmission line circuit to be measured, and being used for the current transitions in the transmission line of electricity is measurable current signal to be measured.
Described signal conditioning circuit is used for current signal to be measured is nursed one's health as shown in Figure 2, in the real work, can carry out fine adjustments to the value of variable resistor R2 according to actual conditions, thereby the assurance system is to the accuracy requirement of output voltage.
Described DSP adopts the TMS320VC5507 chip, and DSP is a kind of microprocessor of uniqueness, receives simulating signal, is converted to 0 or 1 digital signal.Again digital signal is made amendment, deletes, strengthened, it is not only programmable, and travelling speed can reach the per second number with ten million bar complicated order program, considerably beyond general purpose microprocessor in fact the time.
Adopt the TPS70202 power conversion chip in the described power-switching circuit, as shown in Figure 3, the TPS70202 power conversion chip can produce the two-way adjustable voltage respectively by 5V voltage, and the size of voltage is 1.22V and 5.5V, and the output current of two-way power supply is 250mA and 500mA.
Current transformer is connected in the power transmission line circuit to be measured, is measurable current signal to be measured with the current transitions in the power transmission line to be measured, after the current signal entering signal modulate circuit conditioning to be measured, changes among the digital signal input DSP through A/D converter.When power transmission line is not short-circuited fault, the digital signal of input DSP is low level, when power transmission line is short-circuited fault, the digital signal of input DSP is high level, when digital signal is high level, DSP sends instruction, and the control A/D converter stops to gather current signal to be measured within the predetermined time; DSP uploads to PC with the digital signal of gathering simultaneously.PC utilizes the wavelet analysis tool box, finishes analysis and processing to signal.And then calculate the particular location that fault takes place.
Claims (4)
1. the distance measuring equipment of a power transmission line short trouble, it is characterized in that, comprise current transformer, signal conditioning circuit, A/D converter, DSP, power-switching circuit, power supply and PC, wherein, current transformer links to each other with A/D converter by signal conditioning circuit, A/D converter links to each other with DSP, and DSP links to each other with PC, and power supply links to each other with DSP by power-switching circuit.
2. the distance measuring equipment of power transmission line short trouble as claimed in claim 1 is characterized in that, described current transformer adopts the HCT217AC current transformer.
3. the distance measuring equipment of power transmission line short trouble as claimed in claim 1 is characterized in that, described DSP adopts the TMS320VC5507 chip.
4. the distance measuring equipment of power transmission line short trouble as claimed in claim 1 is characterized in that, adopts the TPS70202 power conversion chip in the described power-switching circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220665513 CN203054144U (en) | 2012-12-03 | 2012-12-03 | Range unit for measuring short circuit of transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220665513 CN203054144U (en) | 2012-12-03 | 2012-12-03 | Range unit for measuring short circuit of transmission line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203054144U true CN203054144U (en) | 2013-07-10 |
Family
ID=48737084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220665513 Expired - Fee Related CN203054144U (en) | 2012-12-03 | 2012-12-03 | Range unit for measuring short circuit of transmission line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203054144U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103529275A (en) * | 2013-10-25 | 2014-01-22 | 国家电网公司 | Short-circuit current analysis method and device of regional power grid |
| CN105717353A (en) * | 2016-02-18 | 2016-06-29 | 四川中光防雷科技股份有限公司 | Power transmission line transient current collecting device |
-
2012
- 2012-12-03 CN CN 201220665513 patent/CN203054144U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103529275A (en) * | 2013-10-25 | 2014-01-22 | 国家电网公司 | Short-circuit current analysis method and device of regional power grid |
| CN105717353A (en) * | 2016-02-18 | 2016-06-29 | 四川中光防雷科技股份有限公司 | Power transmission line transient current collecting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130710 Termination date: 20131203 |