CN109917168B - Laser power supply high-speed measurement system and method - Google Patents
Laser power supply high-speed measurement system and method Download PDFInfo
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- CN109917168B CN109917168B CN201711323721.6A CN201711323721A CN109917168B CN 109917168 B CN109917168 B CN 109917168B CN 201711323721 A CN201711323721 A CN 201711323721A CN 109917168 B CN109917168 B CN 109917168B
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- 238000005259 measurement Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000005070 sampling Methods 0.000 claims description 8
- 239000013307 optical fiber Substances 0.000 claims description 6
- 230000009365 direct transmission Effects 0.000 claims description 5
- 239000004020 conductor Substances 0.000 claims description 3
- 238000000691 measurement method Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 230000003287 optical effect Effects 0.000 abstract description 3
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Abstract
The invention discloses a laser power supply high-speed measurement system and a method, wherein the system comprises a mutual inductor, a far-end signal acquisition module and a merging unit, and the method comprises the following steps: the mutual inductor outputs analog quantity to the far-end signal acquisition module; the far-end signal acquisition module performs analog-to-digital conversion, digital processing and electro-optical conversion on the signals, converts the analog signals to be detected into digital optical signals and outputs the digital optical signals to the merging unit; the merging unit forwards the digital signal to the protection device. According to the technical scheme, the remote signal acquisition module based on laser energy supply is used for acquiring the output signal of the electronic transformer on site, the digital signal is transmitted, and the time delay is less than 100 mu s through data processing of the merging unit.
Description
Technical Field
The invention belongs to the field of high-voltage direct-current transmission, and particularly relates to a laser power supply high-speed measurement system and method.
Background
The direct current power grid can realize the partition interconnection of a plurality of alternating current power grids, and is an important solution for constructing the cross-regional power grid interconnection, the direct current voltage measuring device is a key device for ensuring the reliable operation of the power grid, the stable operation of the power grid depends on the direct current voltage measuring device to provide quick and accurate primary current and voltage information for the direct current protection device, and the reliable action within 100 mu s is generally required. The primary system high-voltage side mutual inductor needs to convert all analog quantities (current quantity and voltage quantity) to be measured into digital quantities to be sent to the ground due to the insulation requirement of an insulation platform to the ground, each mutual inductor is provided with a photoelectric conversion system due to the dispersed arrangement of primary equipment, and a merging unit needs to merge signals of a plurality of mutual inductors and then provide the signals to a protection device.
The composition of a laser power supply high-speed measurement system is shown in figure 1, and mainly comprises a far-end acquisition module, a merging unit and a protection device 3. The delay of the acquisition system mainly comes from the following sources, firstly, the mutual inductor and the far-end acquisition module are installed on a primary high-voltage side, and all equipment are not in electrical contact with the ground. Therefore, the analog quantity of the measuring equipment of the device must be converted into a digital quantity optical signal to be transmitted to a control protection device on the ground. However, in consideration of the limitation of the system power supply system, it is required that the power consumption of the device of the acquisition system on the high-voltage primary side is low. However, since the physical positions of the primary devices are dispersed, the multi-channel analog sampling data codes are sent to the merging unit, and the coded data need to be restored at the merging unit side, so that the sampling values of each channel of analog are obtained and then merged. Since the conversion of multiple data paths necessarily introduces additional delay, a merging unit data processing method is needed to reduce the delay of the acquisition signal of the protection device.
Disclosure of Invention
The invention aims to provide a laser power supply high-speed measurement system and a laser power supply high-speed measurement method, which can realize that the time delay is less than 100 mu s under the structure of a laser power supply measurement system.
In order to achieve the above purpose, the solution of the invention is:
a laser power supply high-speed measuring system comprises a mutual inductor, a far-end signal acquisition module and a merging unit, wherein the mutual inductor is used for measuring a voltage and current signal of a primary conductor and outputting an analog quantity signal; the analog quantity signal is converted into a digital signal through a far-end signal acquisition module, is accessed to the merging unit, and is accessed to the protection device after passing through the merging unit; the merging unit adopts a direct-sampling and direct-transmission data processing mechanism to forward the received digital signals to the protection device after merging processing.
Further, after receiving the data packet, the merging unit checks the data packet, and transmits the acquired digital signal to a corresponding receiving end according to an original format, and the receiving end responds after receiving the data.
Furthermore, the mutual inductor adopts a decoupling full-symmetric direct current divider and a broadband direct current divider with symmetrically matched resistance-capacitance parameters.
Furthermore, the far-end signal acquisition module and the merging unit are connected by optical fibers.
The invention also provides a measuring method of the laser power supply high-speed measuring system, which comprises the following steps:
and 3, merging the digital signals transmitted by the far-end signal acquisition module by a merging unit through a direct-sampling and direct-transmission data processing mechanism, merging and transmitting the digital signals to a protection device, namely, after the merging unit receives a data packet, checking the data packet, transmitting the acquired digital signals to a corresponding receiving end according to an original format, and responding after the receiving end receives the data.
Further, in step 1, the mutual inductor outputs a step signal.
Further, in step 2, the digital signal output by the far-end signal acquisition module is transmitted to the merging unit through an optical fiber.
By adopting the scheme, the invention realizes the ultra-short time delay of the direct current measuring device and the parallel output of the multi-path data with different rates by adopting the short time delay mutual inductor and the data processing and transmission technology of the direct-current transmission of the merging unit, and the application requirement of the direct current control protection equipment.
Drawings
FIG. 1 is a simplified diagram of a laser powered high speed measurement system;
FIG. 2 is an overall architecture diagram of a laser powered high speed measurement system;
fig. 3 is a delay configuration diagram of a laser-powered high-speed measurement system.
Detailed Description
The technical scheme of the invention is explained in detail in the following with the accompanying drawings.
As shown in fig. 1 and fig. 2, the present invention provides a laser power supply high-speed measurement system, in which a transformer is used to output an analog signal, and the analog signal is from a primary conductor; the analog quantity signal is converted into a digital signal through a far-end signal acquisition module, is accessed into the merging unit, and is accessed into the protection device after passing through the merging unit.
In this embodiment, the transformer is a decoupling fully-symmetric dc shunt, a broadband dc voltage divider with symmetrically matched resistance-capacitance parameters, and outputs after a step signal is applied once.
The far-end signal acquisition module is positioned on the primary high-voltage side of the direct-current system and used for converting the analog quantity signal output by the mutual inductor into a digital signal.
And the merging unit receives the digital signal and forwards the digital signal to the protection device. The far-end signal acquisition module is connected with the merging unit through optical fibers, sampling is carried out at 50kHz and forwarding is carried out, transmitted digital signals are subjected to Manchester coding, and the 60044-8 protocol is adopted to transmit the digital signals.
The invention also provides a measuring method of the laser power supply high-speed measuring system, which comprises the following steps:
and 3, merging the digital signals transmitted by the far-end signal acquisition module by a merging unit through a direct-sampling and direct-transmission data processing mechanism, merging and transmitting the digital signals to a protection device, namely, after the merging unit receives a data packet, checking the data packet, transmitting the acquired digital signals to a corresponding receiving end according to an original format, and responding after the receiving end receives the data.
Further, in step 1, the mutual inductor outputs a step signal.
Further, in step 2, the digital signal output by the far-end signal acquisition module is transmitted to the merging unit through an optical fiber.
Fig. 3 is a time delay configuration diagram of a laser power supply high-speed measurement system, and the merging unit adopts a direct-to-direct data processing and transmission technology to realize the ultra-short time delay of a direct-current measurement device and the parallel output of multiple paths of data with different rates, thereby meeting the application requirements of direct-current control and protection equipment.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modifications made on the basis of the technical scheme according to the technical idea of the present invention fall within the protection scope of the present invention.
Claims (6)
1. A laser power supply high-speed measuring system is characterized in that: the system comprises a mutual inductor, a far-end signal acquisition module and a merging unit, wherein the mutual inductor is used for measuring a voltage and current signal of a primary conductor and outputting an analog quantity signal, and the mutual inductor is a short-delay mutual inductor; the analog quantity signal is converted into a digital signal through a far-end signal acquisition module, is accessed to the merging unit, and is accessed to the protection device after passing through the merging unit; the merging unit adopts a direct-sampling and direct-transmission data processing mechanism to merge and transmit the received digital signals to the protection device, namely, after the merging unit receives the data packet, the merging unit checks the data packet, the acquired digital signals are transmitted to corresponding receiving terminals according to the original format, and the receiving terminals respond after receiving the data.
2. The laser-powered high-speed measurement system of claim 1, wherein: the mutual inductor adopts a decoupling full-symmetric direct current divider and a broadband direct current divider with symmetrically matched resistance-capacitance parameters.
3. The laser-powered high-speed measurement system of claim 1, wherein: the far-end signal acquisition module is connected with the merging unit through optical fibers.
4. A measuring method of a laser power supply high-speed measuring system is characterized in that: the method comprises the following steps:
step 1, a mutual inductor applies analog quantity to an analog quantity input port of a far-end signal acquisition module, wherein the mutual inductor is a short-delay mutual inductor;
step 2, the far-end signal acquisition module converts the analog quantity signal into a digital signal and transmits the digital signal to the merging unit;
and 3, merging the digital signals transmitted by the far-end signal acquisition module by a merging unit through a direct-sampling and direct-transmission data processing mechanism, merging and transmitting the digital signals to a protection device, namely, after the merging unit receives a data packet, checking the data packet, transmitting the acquired digital signals to a corresponding receiving end according to an original format, and responding after the receiving end receives the data.
5. The measurement method according to claim 4, characterized in that: in the step 1, the mutual inductor outputs a step signal.
6. The measurement method according to claim 4, characterized in that: in the step 2, the digital signal output by the far-end signal acquisition module is transmitted to the merging unit through the optical fiber.
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| CN201711323721.6A CN109917168B (en) | 2017-12-13 | 2017-12-13 | Laser power supply high-speed measurement system and method |
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| CN109917168B true CN109917168B (en) | 2022-03-29 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101930064A (en) * | 2009-06-23 | 2010-12-29 | 华东电力试验研究院有限公司 | Delay measuring method of merging unit and system thereof |
| CN202486199U (en) * | 2012-03-22 | 2012-10-10 | 淄博职业学院 | Data acquisition unit of electronic type mutual inductor |
| CN103969500A (en) * | 2014-04-11 | 2014-08-06 | 深圳市中电电力技术股份有限公司 | Device, method and system for collecting smart power grid analog quantity |
| CN105548769A (en) * | 2016-01-13 | 2016-05-04 | 江苏省电力公司电力科学研究院 | Relay protection action delay time grading test system and method |
| CN106896282A (en) * | 2017-01-06 | 2017-06-27 | 许继集团有限公司 | A kind of data sampling method and the combining unit for data sampling |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103808998B (en) * | 2012-11-15 | 2017-11-28 | 国家电网公司 | Measurement loop device and the implementation method of metering |
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- 2017-12-13 CN CN201711323721.6A patent/CN109917168B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101930064A (en) * | 2009-06-23 | 2010-12-29 | 华东电力试验研究院有限公司 | Delay measuring method of merging unit and system thereof |
| CN202486199U (en) * | 2012-03-22 | 2012-10-10 | 淄博职业学院 | Data acquisition unit of electronic type mutual inductor |
| CN103969500A (en) * | 2014-04-11 | 2014-08-06 | 深圳市中电电力技术股份有限公司 | Device, method and system for collecting smart power grid analog quantity |
| CN105548769A (en) * | 2016-01-13 | 2016-05-04 | 江苏省电力公司电力科学研究院 | Relay protection action delay time grading test system and method |
| CN106896282A (en) * | 2017-01-06 | 2017-06-27 | 许继集团有限公司 | A kind of data sampling method and the combining unit for data sampling |
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Effective date of registration: 20240114 Address after: 211102, No. 69, Su Yuan Avenue, Jiangning District, Jiangsu, Nanjing Patentee after: NR ELECTRIC Co.,Ltd. Patentee after: NR ENGINEERING Co.,Ltd. Patentee after: NR ELECTRIC POWER ELECTRONICS Co.,Ltd. Address before: 211102, No. 69, Su Yuan Avenue, Jiangning District, Jiangsu, Nanjing Patentee before: NR ELECTRIC Co.,Ltd. Patentee before: NR ENGINEERING Co.,Ltd. |