CN108802484A - A kind of gas isolated REAL-TIME SELF wideband high voltage meter - Google Patents
A kind of gas isolated REAL-TIME SELF wideband high voltage meter Download PDFInfo
- Publication number
- CN108802484A CN108802484A CN201810645858.1A CN201810645858A CN108802484A CN 108802484 A CN108802484 A CN 108802484A CN 201810645858 A CN201810645858 A CN 201810645858A CN 108802484 A CN108802484 A CN 108802484A
- Authority
- CN
- China
- Prior art keywords
- voltage
- electric field
- electrode
- measuring device
- optical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 85
- 230000005684 electric field Effects 0.000 claims abstract description 57
- 239000012212 insulator Substances 0.000 claims abstract description 28
- 238000012545 processing Methods 0.000 claims abstract description 26
- 238000007789 sealing Methods 0.000 claims abstract description 24
- 239000013307 optical fiber Substances 0.000 claims abstract description 8
- 230000010287 polarization Effects 0.000 claims abstract description 6
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000000206 photolithography Methods 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- 229910013641 LiNbO 3 Inorganic materials 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 28
- 239000003990 capacitor Substances 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 7
- 238000009413 insulation Methods 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- 230000007774 longterm Effects 0.000 description 3
- 229910003327 LiNbO3 Inorganic materials 0.000 description 2
- 230000005697 Pockels effect Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005350 ferromagnetic resonance Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000033772 system development Effects 0.000 description 1
- 239000013598 vector Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/24—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
本发明涉及一种气体绝缘的无需电容分压器的实时自校准宽频高电压测量装置，属于光学电压测量装置技术领域。高压电极和绝缘密封板分别固定在所述空心绝缘子的两端，完成所述空心绝缘子的密封；所述圆筒屏蔽层沿所述空心绝缘子内壁一圈设置；绝缘密封板的底部固定有基准电压电极，在所述基准电压电极的下方设有绝缘套筒，所述绝缘套筒的下端连接有接地电极；所述绝缘套筒内部中轴线处固定有集成光学电场传感器，所述集成光学电场传感器通过保偏光纤分别与SLD光源、光信号接收机连接，所述光信号接收机的输出端连接信号处理单元。本发明所述电压测量装置消除了温度以及外界电场对电压测量装置测量精度的影响。
The invention relates to a gas-insulated real-time self-calibrating broadband high-voltage measuring device without a capacitor voltage divider, and belongs to the technical field of optical voltage measuring devices. The high-voltage electrodes and insulating sealing plates are respectively fixed at both ends of the hollow insulator to complete the sealing of the hollow insulator; the cylindrical shielding layer is arranged along the inner wall of the hollow insulator; the bottom of the insulating sealing plate is fixed with a reference voltage An insulating sleeve is provided below the reference voltage electrode, and the lower end of the insulating sleeve is connected to a ground electrode; an integrated optical electric field sensor is fixed on the inner axis of the insulating sleeve, and the integrated optical electric field sensor It is respectively connected to the SLD light source and the optical signal receiver through the polarization maintaining optical fiber, and the output end of the optical signal receiver is connected to the signal processing unit. The voltage measuring device of the invention eliminates the influence of temperature and external electric field on the measurement accuracy of the voltage measuring device.
Description
技术领域technical field
本发明涉及一种气体绝缘的实时自校准宽频高电压测量装置，属于光学电压测量装置技术领域。The invention relates to a gas-insulated real-time self-calibrating broadband high-voltage measuring device, which belongs to the technical field of optical voltage measuring devices.
背景技术Background technique
随着我国电力系统容量的增加、运行电压等级的提高以及输电距离的增长，整个系统的监测、控制及保护必须满足更高的要求。传统的电磁式电压互感器因为存在绝缘难度高、动态范围小、铁磁谐振、频带窄等方面的问题已经难以满足电力系统发展的需要。With the increase of the capacity of my country's power system, the increase of operating voltage level and the increase of transmission distance, the monitoring, control and protection of the whole system must meet higher requirements. Traditional electromagnetic voltage transformers have been difficult to meet the needs of power system development due to problems such as high insulation difficulty, small dynamic range, ferromagnetic resonance, and narrow frequency band.
电子技术以及光电技术的不断发展，使光学电压互感器逐渐表现出替代传统电压互感器的巨大潜力。光学电压互感器主要利用泡克尔斯效应，通过对光信号的调制测量计算待测电压。目前光学电压互感器的传感器部分主要分为体调制型光学电压传感器和集成光学电场传感器，由于存在动态响应范围大、灵敏度高、频带宽等方面的优势，集成光学电场传感器成为未来发展的趋势。然而由于测量精度受温度以及外界干扰电场的影响严重，使得采用集成光学电场传感器的光学电压互感器在长期运行的稳定性和可靠性上难以满足实用化的要求。中国发明专利201110334618.8公开了一种光学电压传感器的自校准方法，其采用光学晶体作为光学电压传感单元，电压直接施加于光学晶体上，存在绝缘问题，无法用于高电压测量。中国发明专利201410419943.8公开了一种光学电压互感器，本质上是基于法拉第旋光效应的电流互感器，利用高压电容器将电压转换电流进行测量。中国发明专利201610998948.X公开了一种纳米材料介电屏蔽型电子式光学电压互感器，无法消除温度对测量精度的影响。中国发明专利201510426486.X公开了一种基于SF6同轴电容分压的光学电压互感器，采用内部的SF6同轴电容器作为高压侧分压电容，采用高性能的NPO电容作为低压侧分压电容，本质上基于电容分压器原理，且无法消除温度对测量精度的影响。中国发明专利201110365247.X公布了一种电容分压型自校准光学电压互感器，其原理是通过高精度电容分压器，将被测电压转化为低压进行测量。With the continuous development of electronic technology and optoelectronic technology, optical voltage transformers gradually show great potential to replace traditional voltage transformers. The optical voltage transformer mainly uses the Pockels effect to calculate the voltage to be measured through the modulation measurement of the optical signal. At present, the sensor part of optical voltage transformer is mainly divided into volume modulation optical voltage sensor and integrated optical electric field sensor. Due to the advantages of large dynamic response range, high sensitivity and wide frequency bandwidth, integrated optical electric field sensor has become the future development trend. However, since the measurement accuracy is seriously affected by temperature and external interference electric field, it is difficult for the optical voltage transformer with integrated optical electric field sensor to meet the practical requirements in terms of long-term operation stability and reliability. Chinese invention patent 201110334618.8 discloses a self-calibration method for an optical voltage sensor, which uses an optical crystal as the optical voltage sensing unit, and the voltage is directly applied to the optical crystal, which has insulation problems and cannot be used for high voltage measurement. Chinese invention patent 201410419943.8 discloses an optical voltage transformer, which is essentially a current transformer based on the Faraday rotation optical effect, and uses a high-voltage capacitor to convert voltage into current for measurement. Chinese invention patent 201610998948.X discloses a nano-material dielectric shielding electronic optical voltage transformer, which cannot eliminate the influence of temperature on measurement accuracy. Chinese invention patent 201510426486.X discloses an optical voltage transformer based on SF6 coaxial capacitor voltage division. The internal SF6 coaxial capacitor is used as the voltage divider capacitor on the high voltage side, and the high-performance NPO capacitor is used as the voltage divider capacitor on the low voltage side. It is essentially based on the principle of capacitive voltage divider, and the influence of temperature on measurement accuracy cannot be eliminated. Chinese invention patent 201110365247.X discloses a capacitive voltage divider type self-calibrating optical voltage transformer. The principle is to convert the measured voltage into a low voltage for measurement through a high-precision capacitive voltage divider.
发明内容Contents of the invention
为了消除温度以及外界电场对电压测量装置测量精度的影响，本发明的目的在于提供一种气体绝缘的且无需电容分压器的实时自校准宽频高电压测量装置。首先，该光学电压测量装置的电场传感器在测量被测电压的同时，测量另一组与被测电压频率不同的基准电压，由于温度对两组电压的测量精度影响一致，可以通过对基准电压测量值的校准完成对被测电压测量值的自动温度补偿；另外，通过引入一组常规互感器测量数据，采用一种三相解耦的方法得到其他两相电压对于本相测量值的影响因素，进而完成对外界干扰电场的修正；使光学电压测量装置在长期运行的稳定性和可靠性上能够满足实用化的要求。In order to eliminate the influence of temperature and external electric field on the measurement accuracy of the voltage measuring device, the object of the present invention is to provide a real-time self-calibrating broadband high-voltage measuring device that is gas-insulated and does not require a capacitive voltage divider. First, the electric field sensor of the optical voltage measurement device measures the measured voltage while measuring another set of reference voltages with a different frequency from the measured voltage. Since the temperature has the same effect on the measurement accuracy of the two sets of voltages, it can be measured by measuring the reference voltage The calibration of the measured voltage completes the automatic temperature compensation of the measured voltage measurement value; in addition, by introducing a set of conventional transformer measurement data, a three-phase decoupling method is used to obtain the influence factors of other two-phase voltages on the current phase measurement value, Furthermore, the correction of the external disturbance electric field is completed; the stability and reliability of the optical voltage measurement device in long-term operation can meet the practical requirements.
为实现上述目的，本发明提供的技术方案如下：In order to achieve the above object, the technical scheme provided by the invention is as follows:
一种采用集成光学电场传感器的光学电压测量装置，包括高压接线端子、高压电极、圆筒屏蔽层、空心绝缘子、绝缘密封板、基准电压电极、集成光学电场传感器、绝缘套筒、接地电极、保偏光纤、稳压变频电源、SLD光源、光信号接收机和信号处理单元；其中：An optical voltage measurement device using an integrated optical electric field sensor, comprising a high voltage terminal, a high voltage electrode, a cylindrical shielding layer, a hollow insulator, an insulating sealing plate, a reference voltage electrode, an integrated optical electric field sensor, an insulating sleeve, a grounding electrode, a protection Polarized optical fiber, stabilized voltage variable frequency power supply, SLD light source, optical signal receiver and signal processing unit; of which:
高压电极和绝缘密封板分别固定在所述空心绝缘子的两端，完成所述空心绝缘子的密封；所述圆筒屏蔽层沿所述空心绝缘子内壁一圈设置；The high-voltage electrodes and insulating sealing plates are respectively fixed on both ends of the hollow insulator to complete the sealing of the hollow insulator; the cylindrical shielding layer is arranged along the inner wall of the hollow insulator;
所述高压电极固定在所述空心绝缘子的顶端，且所述高压电极连接高压接线端子，以获得被测电压；The high-voltage electrode is fixed on the top of the hollow insulator, and the high-voltage electrode is connected to a high-voltage terminal to obtain a measured voltage;
所述绝缘密封板固定在所述空心绝缘子的底端，在所述绝缘密封板的底部固定有基准电压电极，所述基准电压电极连接稳压变频电源；在所述基准电压电极的下方设有绝缘套筒，且所述绝缘套筒的上端与绝缘密封板的下端连接，所述绝缘套筒的下端连接有接地电极；所述绝缘套筒内部中轴线处固定有集成光学电场传感器，所述集成光学电场传感器通过保偏光纤分别与SLD光源、光信号接收机连接，所述光信号接收机的输出端连接信号处理单元。The insulating sealing plate is fixed on the bottom end of the hollow insulator, and a reference voltage electrode is fixed on the bottom of the insulating sealing plate, and the reference voltage electrode is connected to a constant voltage variable frequency power supply; An insulating sleeve, and the upper end of the insulating sleeve is connected to the lower end of the insulating sealing plate, and the lower end of the insulating sleeve is connected to a ground electrode; an integrated optical electric field sensor is fixed on the inner axis of the insulating sleeve, and the The integrated optical electric field sensor is respectively connected to the SLD light source and the optical signal receiver through the polarization maintaining optical fiber, and the output end of the optical signal receiver is connected to the signal processing unit.
进一步的，所述圆筒屏蔽层为阻容性屏蔽材料套管，且所述圆筒屏蔽层与所述空心绝缘子同轴。Further, the cylindrical shielding layer is a sleeve of resistive-capacitance shielding material, and the cylindrical shielding layer is coaxial with the hollow insulator.
进一步的，所述高压电极、绝缘密封板、基准电压电极、绝缘套筒和接地电极均为与所述空心绝缘子同轴心的圆柱体。Further, the high voltage electrode, the insulating sealing plate, the reference voltage electrode, the insulating sleeve and the grounding electrode are all cylinders coaxial with the hollow insulator.
进一步的，所述高压电极、基准电压电极和接地电极均为铜质电极。Further, the high voltage electrode, the reference voltage electrode and the ground electrode are all copper electrodes.
进一步的，所述信号处理单元包括依次连接的抗混叠滤波器、A/D转换模块、数字信号处理系统和光电输出模块，其中所述抗混叠滤波器的输入端连接光信号接收机的输出端，所述抗混叠滤波器的输出端连接A/D转换模块的输入端，所述A/D转换模块的输出端连接数字信号处理系统的输入端，所述数字信号处理系统的输出端连接光电输出模块。Further, the signal processing unit includes an anti-aliasing filter, an A/D conversion module, a digital signal processing system, and a photoelectric output module connected in sequence, wherein the input end of the anti-aliasing filter is connected to the optical signal receiver Output terminal, the output terminal of the anti-aliasing filter is connected to the input terminal of the A/D conversion module, the output terminal of the A/D conversion module is connected to the input terminal of the digital signal processing system, and the output terminal of the digital signal processing system Connect to the photoelectric output module.
进一步的，所述集成光学电场传感器为基于共路干涉的集成光学电场传感器，以x切z传的LiNbO3晶片作为衬底，使用Ti扩散法制作光波导，并通过光刻的方法在光波导附近制作偶极子天线和电极。Further, the integrated optical electric field sensor is an integrated optical electric field sensor based on common path interference, using an x-cut z - passed LiNbO3 wafer as a substrate, using a Ti diffusion method to fabricate an optical waveguide, and using a photolithography method on the optical waveguide Make a dipole antenna and electrodes nearby.
本发明的有益效果为：The beneficial effects of the present invention are:
1、该电压测量装置采用气体绝缘，采用集成光学电场传感器，电场可测范围大，无需电容分压器将被测电压由高压转换为低压，降低了制造成本与难度。1. The voltage measuring device is insulated by gas and adopts an integrated optical electric field sensor. The electric field can be measured in a large range. There is no need for a capacitive voltage divider to convert the measured voltage from high voltage to low voltage, which reduces the manufacturing cost and difficulty.
2、该电压测量装置使用基准电压校准的方法，消除了温度对光学电压测量装置测量精度的影响，提高了光学电压测量装置在长期运行中的稳定性。2. The voltage measuring device adopts a reference voltage calibration method, which eliminates the influence of temperature on the measurement accuracy of the optical voltage measuring device, and improves the stability of the optical voltage measuring device in long-term operation.
3、该电压测量装置采用集成光学电场传感器，具有动态响应范围大、灵敏度高、频带宽等方面的优势，其有效频率响应能够达到100MHz。3. The voltage measurement device adopts an integrated optical electric field sensor, which has the advantages of large dynamic response range, high sensitivity, and wide frequency band, and its effective frequency response can reach 100MHz.
4、该电压测量装置采用阻容性屏蔽材料套管，能够有效的减少外界电场对光学电压测量装置测量精度的影响，提高了电压测量装置的抗干扰能力。4. The voltage measuring device adopts a resistance-capacitance shielding material casing, which can effectively reduce the influence of the external electric field on the measurement accuracy of the optical voltage measuring device, and improve the anti-interference ability of the voltage measuring device.
5、该电压测量装置使用气体间隙绝缘，可以较小尺寸的电压测量装置实现高压测量，重量轻、制造难度小，仅使用一个电场传感器，成本低廉。5. The voltage measuring device uses gas gap insulation, can realize high-voltage measurement with a smaller-sized voltage measuring device, is light in weight, less difficult to manufacture, and only uses one electric field sensor, so the cost is low.
附图说明Description of drawings
图1为本发明所述电压测量装置的结构示意图；Fig. 1 is the structural representation of voltage measurement device of the present invention;
图2为本发明所述信号处理单元的结构示意图；Fig. 2 is a schematic structural diagram of the signal processing unit of the present invention;
其中，1-高压接线端子、2-高压电极、3-圆筒屏蔽层、4-空心绝缘子、5-绝缘密封板、6-基准电压电极、7-集成光学电场传感器、8-绝缘套筒、9-接地电极、10-保偏光纤、11-稳压变频电源、12-SLD光源、13-光信号接收机和14-信号处理单元，141-抗混叠滤波器，142-A/D转换模块，143-数字信号处理系统，144-光电输出模块。Among them, 1-high voltage terminal, 2-high voltage electrode, 3-cylindrical shielding layer, 4-hollow insulator, 5-insulation sealing plate, 6-reference voltage electrode, 7-integrated optical electric field sensor, 8-insulation sleeve, 9-Grounding electrode, 10-Polarization maintaining fiber, 11-Voltage stabilized power supply, 12-SLD light source, 13-Optical signal receiver and 14-Signal processing unit, 141-Anti-aliasing filter, 142-A/D conversion Module, 143-digital signal processing system, 144-optical output module.
具体实施方式Detailed ways
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本发明，并不用于限定本发明。In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
如图1所示，一种气体绝缘的实时自校准宽频高电压测量装置，包括高压接线端子1、高压电极2、圆筒屏蔽层3、空心绝缘子4、绝缘密封板5、基准电压电极6、集成光学电场传感器7、绝缘套筒8、接地电极9、保偏光纤10、稳压变频电源11、SLD光源12、光信号接收机13和信号处理单元14；其中：As shown in Figure 1, a gas-insulated real-time self-calibrating broadband high-voltage measuring device includes a high-voltage terminal 1, a high-voltage electrode 2, a cylindrical shielding layer 3, a hollow insulator 4, an insulating sealing plate 5, a reference voltage electrode 6, Integrated optical electric field sensor 7, insulating sleeve 8, ground electrode 9, polarization maintaining optical fiber 10, regulated variable frequency power supply 11, SLD light source 12, optical signal receiver 13 and signal processing unit 14; wherein:
高压电极2和绝缘密封板5分别固定在所述空心绝缘子4的两端，完成所述空心绝缘子4的密封；所述圆筒屏蔽层3沿所述空心绝缘子4内壁一圈设置；The high-voltage electrode 2 and the insulating sealing plate 5 are respectively fixed on both ends of the hollow insulator 4 to complete the sealing of the hollow insulator 4; the cylindrical shielding layer 3 is arranged along the inner wall of the hollow insulator 4;
所述高压电极2固定在所述空心绝缘子4的顶端，且所述高压电极2连接高压接线端子1，以获得被测电压；The high-voltage electrode 2 is fixed on the top of the hollow insulator 4, and the high-voltage electrode 2 is connected to the high-voltage terminal 1 to obtain a measured voltage;
所述绝缘密封板5固定在所述空心绝缘子4的底端，在所述绝缘密封板5的底部固定有基准电压电极6，所述基准电压电极6连接稳压变频电源11；在所述基准电压电极6的下方设有绝缘套筒8，且所述绝缘套筒8的上端与绝缘密封板5的下端连接，所述绝缘套筒8的下端连接有接地电极9；所述绝缘套筒8内部中轴线处固定有集成光学电场传感器7，所述集成光学电场传感器7通过保偏光纤10分别与SLD光源12、光信号接收机13连接，所述光信号接收机13的输出端连接信号处理单元14。The insulating sealing plate 5 is fixed on the bottom of the hollow insulator 4, and a reference voltage electrode 6 is fixed on the bottom of the insulating sealing plate 5, and the reference voltage electrode 6 is connected to a constant voltage variable frequency power supply 11; An insulating sleeve 8 is provided below the voltage electrode 6, and the upper end of the insulating sleeve 8 is connected to the lower end of the insulating sealing plate 5, and the lower end of the insulating sleeve 8 is connected to a ground electrode 9; the insulating sleeve 8 An integrated optical electric field sensor 7 is fixed on the inner central axis, and the integrated optical electric field sensor 7 is respectively connected to the SLD light source 12 and the optical signal receiver 13 through the polarization maintaining optical fiber 10, and the output end of the optical signal receiver 13 is connected to the signal processing Unit 14.
所述圆筒屏蔽层3为阻容性屏蔽材料套管，且所述圆筒屏蔽层3与所述空心绝缘子4同轴。The cylindrical shielding layer 3 is a sleeve of resistive-capacitive shielding material, and the cylindrical shielding layer 3 is coaxial with the hollow insulator 4 .
所述高压电极2、绝缘密封板5、基准电压电极6、绝缘套筒8和接地电极9均为与所述空心绝缘子4同轴心的圆柱体。The high voltage electrode 2 , the insulating sealing plate 5 , the reference voltage electrode 6 , the insulating sleeve 8 and the grounding electrode 9 are all cylinders coaxial with the hollow insulator 4 .
所述高压电极2、基准电压电极6、和接地电极9均为铜质电极。The high voltage electrode 2, the reference voltage electrode 6, and the ground electrode 9 are copper electrodes.
如图2所示，所述信号处理单元14包括依次连接的抗混叠滤波器141、A/D转换模块142、数字信号处理系统143和光电输出模块144，其中所述抗混叠滤波器141的输入端连接光信号接收机13的输出端，所述抗混叠滤波器141的输出端连接A/D转换模块142的输入端，所述A/D转换模块142的输出端连接数字信号处理系统143的输入端，所述数字信号处理系统143的输出端连接光电输出模块144。As shown in Figure 2, the signal processing unit 14 includes an anti-aliasing filter 141, an A/D conversion module 142, a digital signal processing system 143 and a photoelectric output module 144 connected in sequence, wherein the anti-aliasing filter 141 The input end of the anti-aliasing filter 141 is connected to the output end of the optical signal receiver 13, the output end of the anti-aliasing filter 141 is connected to the input end of the A/D conversion module 142, and the output end of the A/D conversion module 142 is connected to the digital signal processing The input end of the system 143 and the output end of the digital signal processing system 143 are connected to the photoelectric output module 144 .
所述集成光学电场传感器7为基于共路干涉的集成光学电场传感器，以x切z传的LiNbO3晶片作为衬底，使用Ti扩散法制作光波导，并通过光刻的方法在光波导附近制作偶极子天线和电极。The integrated optical electric field sensor 7 is an integrated optical electric field sensor based on common path interference, with an x-cut z - passed LiNbO3 wafer as a substrate, using a Ti diffusion method to make an optical waveguide, and making it near the optical waveguide by photolithography Dipole antenna and electrodes.
所述集成光学电场传感器7根据光信号由Pockels效应产生的相位延迟计算所述集成光学电场传感器7处竖直方向的电场强度，进而得到被测电压；所述集成光学电场传感器7处竖直方向的电场强度表示为：The integrated optical electric field sensor 7 calculates the electric field intensity in the vertical direction at the integrated optical electric field sensor 7 according to the phase delay that the optical signal produces by the Pockels effect, and then obtains the measured voltage; the vertical direction at the integrated optical electric field sensor 7 places The electric field strength of is expressed as:
E＝E1+E2+E3 E＝E 1 +E 2 +E 3
式中，E1表示高压电极2上的被测电压U1在集成光学电场传感器7处产生的竖直方向电场强度；E2表示基准电压电极6上的基准电压U2在集成光学电场传感器7处产生的竖直方向电场强度；E3表示干扰电场在集成光学电场传感器7处产生的竖直方向电场强度。In the formula, E 1 represents the vertical direction electric field strength generated by the measured voltage U 1 on the high-voltage electrode 2 at the integrated optical electric field sensor 7; E 2 represents the reference voltage U 2 on the reference voltage electrode 6 at the integrated optical electric field sensor 7 The vertical electric field intensity generated at the place; E 3 represents the vertical electric field intensity generated by the interfering electric field at the integrated optical electric field sensor 7.
一种消除外界温度和电场对电压测量装置测量精度影响的方法，基于上述采用集成光学电场传感器并具有温漂校准功能的光学电压测量装置，包括以下步骤：A method for eliminating the influence of external temperature and electric field on the measurement accuracy of a voltage measuring device, based on the above-mentioned optical voltage measuring device using an integrated optical electric field sensor and having a temperature drift calibration function, comprising the following steps:
步骤1，所述电压测量装置的集成光学电场传感器在测量被测电压U1的同时，测量另一组与被测电压频率不同的基准电压U2，通过对基准电压测量值的校准完成对被测电压测量值的自动温度补偿；具体的：Step 1, the integrated optical electric field sensor of the voltage measuring device measures another set of reference voltage U 2 different in frequency from the measured voltage U 1 while measuring the measured voltage U 1 , and the measured value of the reference voltage is calibrated to complete the Automatic temperature compensation of voltage measurement values; specifically:
步骤1-1，分别测得被测电压U1和基准电压U2：Step 1-1, measure the measured voltage U 1 and the reference voltage U 2 respectively:
被测电压U1在集成光学电场传感器处产生的竖直方向电场强度E1与被测电压U1存在线性关系，并表示为：E1＝k1U1，式中k1为相关系数；There is a linear relationship between the vertical electric field intensity E 1 generated by the measured voltage U 1 at the integrated optical electric field sensor and the measured voltage U 1 , which is expressed as: E 1 =k 1 U 1 , where k 1 is the correlation coefficient;
基准电压U2在集成光学电场传感器处产生的竖直方向电场强度E2表示为：E2＝k2U2，式中k2为相关系数。The vertical electric field intensity E 2 generated by the reference voltage U 2 at the integrated optical electric field sensor is expressed as: E 2 =k 2 U 2 , where k 2 is the correlation coefficient.
步骤1-2，集成光学电场传感器将检测到的同时含被测电压U1与基准电压U2的信号通过保偏光纤传送至光信号接收机，再由光信号接收机将接收到的信号发送至信号处理单元。Step 1-2, the integrated optical electric field sensor transmits the detected signal containing the measured voltage U 1 and the reference voltage U 2 to the optical signal receiver through the polarization maintaining optical fiber, and then the optical signal receiver sends the received signal to to the signal processing unit.
步骤1-3，光信号接收机发出的信号经过抗混叠滤波器后，输出至A/D转换模块，A/D转换模块将模拟信号转换为数字信号并将数字信号传输至数字信号处理系统，所述数字信号处理系统将A/D转换模块输出的同时含有被测电压分量与基准电压分量的信号进行数字滤波处理，分别得到被测电压的测量值U1′与基准电压的测量值U2′。Step 1-3, the signal sent by the optical signal receiver is output to the A/D conversion module after passing through the anti-aliasing filter, and the A/D conversion module converts the analog signal into a digital signal and transmits the digital signal to the digital signal processing system , the digital signal processing system digitally filters the signal output by the A/D conversion module and contains the measured voltage component and the reference voltage component, and obtains the measured value U 1 ' of the measured voltage and the measured value U of the reference voltage respectively. 2 ′.
步骤1-4，所述数字信号处理系统进一步将基准电压的测量值U2＇与基准电压的实际值U2进行比较计算，得到电压测量装置实时的灵敏度k，其中k＝U2/U2′，最后利用电压测量装置实时的灵敏度k完成对被测电压的测量值U1′的校准，得到不受外界温度影响的输出电压信号：U″1＝kU1。Step 1-4, the digital signal processing system further compares the measured value U 2 ' of the reference voltage with the actual value U 2 of the reference voltage, and obtains the real-time sensitivity k of the voltage measuring device, where k=U 2 /U 2 ′, and finally use the real-time sensitivity k of the voltage measuring device to calibrate the measured value U 1 ′ of the measured voltage to obtain an output voltage signal that is not affected by the external temperature: U″ 1 =kU 1 .
步骤2，通过引入一组常规电压测量装置测量数据，采用三相解耦的方法消除相邻相电压对本相电压测量装置准确度的干扰，具体的：Step 2, by introducing a set of measurement data from a conventional voltage measurement device, the three-phase decoupling method is used to eliminate the interference of adjacent phase voltages on the accuracy of the current phase voltage measurement device, specifically:
步骤2-1，使用A相电压测量装置、B相电压测量装置、C相电压测量装置分别测得电场波形为和 Step 2-1, use the A-phase voltage measuring device, B-phase voltage measuring device, and C-phase voltage measuring device to measure the electric field waveform as and
其中，分别为A、B、C三相的电压向量；kaa、kab、kac分别为A相电压、B相电压、C相电压对A相集成光学电场传感器的影响系数，kba、kbb、kbc分别为A相电压、B相电压、C相电压对B相集成光学电场传感器的影响系数，kca、kcb、kcc分别为A相电压、B相电压、C相电压对C相集成光学电场传感器的影响系数。in, are the voltage vectors of A, B, and C phases; k aa , k ab , and k ac are the influence coefficients of A-phase voltage, B-phase voltage, and C-phase voltage on the A-phase integrated optical electric field sensor, k ba , k bb , k bc are the influence coefficients of A-phase voltage, B-phase voltage and C-phase voltage on B-phase integrated optical electric field sensor respectively, k ca , k cb , k cc are A-phase voltage, B-phase voltage and C-phase voltage on C Influence coefficient of phase-integrated optical electric field sensor.
步骤2-2，引入一组常规电压测量装置测量数据，首先将作为已知量，通过试验测得kaa、kbb、kcc，且kaa、kbb、kcc保持不变；通过 kaa计算出kab、kac，通过kbb计算出kba、kbc，通过kcc计算出kca、kcb。Step 2-2, introduce a group of conventional voltage measurement device measurement data, first put As known quantities, k aa , k bb , k cc are measured through experiments, and k aa , k bb , k cc remain unchanged; k aa calculates k ab , k ac , through k bb calculates k ba , k bc , through k cc calculates k ca , k cb .
步骤2-3，根据得到的影响系数，构造一个矩阵A，有以下关系式：Step 2-3, according to the obtained influence coefficient, construct a matrix A, There are the following relations:
对所述矩阵A取逆，得到解耦矩阵B，B＝A-1。The matrix A is inverted to obtain a decoupling matrix B, where B=A −1 .
步骤2-4，利用解耦矩阵B，以及A、B、C相电压测量装置测得的电场波形求解A、B、C相电压 Step 2-4, using the decoupling matrix B, and the electric field waveforms measured by the A, B, and C phase voltage measuring devices Solve the A, B, C phase voltage
步骤2-5，得到解耦后的三相电压信号由该三相电压测量装置独立的电压波形，经过解耦得到三相电压的实际波形，从而消除相邻相电压对本相电压测量装置准确度的干扰。Step 2-5, get the decoupled three-phase voltage signal The independent voltage waveform of the three-phase voltage measuring device is decoupled to obtain the actual waveform of the three-phase voltage, thereby eliminating the interference of adjacent phase voltages on the accuracy of the current phase voltage measuring device.
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810645858.1A CN108802484B (en) | 2018-06-21 | 2018-06-21 | Gas-insulated real-time self-calibration broadband high-voltage measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810645858.1A CN108802484B (en) | 2018-06-21 | 2018-06-21 | Gas-insulated real-time self-calibration broadband high-voltage measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108802484A true CN108802484A (en) | 2018-11-13 |
| CN108802484B CN108802484B (en) | 2020-10-16 |
Family
ID=64084270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810645858.1A Active CN108802484B (en) | 2018-06-21 | 2018-06-21 | Gas-insulated real-time self-calibration broadband high-voltage measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108802484B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110031789A (en) * | 2019-04-09 | 2019-07-19 | 西北核技术研究所 | The gamut caliberating device and scaling method of high-voltage nanosecond pulse divider scale factor |
| CN110531141A (en) * | 2019-09-24 | 2019-12-03 | 国网重庆市电力公司电力科学研究院 | A kind of sub- voltage sensor system of Intelligent insulation |
| CN110542839A (en) * | 2019-09-09 | 2019-12-06 | 重庆大学 | All-optical insulation fault monitoring system for SF6 gas-insulated equipment |
| CN113655262A (en) * | 2021-04-12 | 2021-11-16 | 重庆大学 | Voltage measurement self-decoupling method based on multi-dimensional equivalent capacitance calculation |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1844941A (en) * | 2006-05-23 | 2006-10-11 | 清华大学 | A photoelectric integrated strong electric field measurement system |
| CN1844942A (en) * | 2006-05-23 | 2006-10-11 | 清华大学 | A photoelectric integrated sensor for strong electric field measurement |
| CN102435829A (en) * | 2011-10-28 | 2012-05-02 | 哈尔滨工业大学 | Optical voltage sensor and self-calibration method for realizing sensor |
| CN102445581A (en) * | 2011-11-17 | 2012-05-09 | 哈尔滨工业大学 | Capacitive voltage-division type self-calibration optical voltage transducer |
| CN103424594A (en) * | 2013-07-26 | 2013-12-04 | 易能乾元（北京）电力科技有限公司 | High-tension sensing optical voltage transformer |
| CN104849535A (en) * | 2015-05-29 | 2015-08-19 | 清华大学 | Method for decoupling three-phase overvoltage measurement waveform by utilizing overvoltage waveform jump |
| CN105629049A (en) * | 2016-03-30 | 2016-06-01 | 三峡大学 | Gauss quadrature algorithm-based optical voltage transformer |
-
2018
- 2018-06-21 CN CN201810645858.1A patent/CN108802484B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1844941A (en) * | 2006-05-23 | 2006-10-11 | 清华大学 | A photoelectric integrated strong electric field measurement system |
| CN1844942A (en) * | 2006-05-23 | 2006-10-11 | 清华大学 | A photoelectric integrated sensor for strong electric field measurement |
| CN102435829A (en) * | 2011-10-28 | 2012-05-02 | 哈尔滨工业大学 | Optical voltage sensor and self-calibration method for realizing sensor |
| CN102445581A (en) * | 2011-11-17 | 2012-05-09 | 哈尔滨工业大学 | Capacitive voltage-division type self-calibration optical voltage transducer |
| CN103424594A (en) * | 2013-07-26 | 2013-12-04 | 易能乾元（北京）电力科技有限公司 | High-tension sensing optical voltage transformer |
| CN104849535A (en) * | 2015-05-29 | 2015-08-19 | 清华大学 | Method for decoupling three-phase overvoltage measurement waveform by utilizing overvoltage waveform jump |
| CN105629049A (en) * | 2016-03-30 | 2016-06-01 | 三峡大学 | Gauss quadrature algorithm-based optical voltage transformer |
Non-Patent Citations (2)
| Title |
|---|
| 严向坤 等: "介电屏蔽体的光学电压互感器的电场仿真研究", 《黑龙江科技信息》 * |
| 谢施君 等: "基于集成光学电场传感器的过电压测量技术", 《高电压技术》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110031789A (en) * | 2019-04-09 | 2019-07-19 | 西北核技术研究所 | The gamut caliberating device and scaling method of high-voltage nanosecond pulse divider scale factor |
| CN110031789B (en) * | 2019-04-09 | 2022-04-01 | 西北核技术研究所 | Full-range calibration device and calibration method for high-voltage nanosecond pulse voltage divider scale factor |
| CN110542839A (en) * | 2019-09-09 | 2019-12-06 | 重庆大学 | All-optical insulation fault monitoring system for SF6 gas-insulated equipment |
| CN110542839B (en) * | 2019-09-09 | 2021-11-23 | 重庆大学 | For SF6All-optical insulation fault monitoring system of gas insulation equipment |
| CN110531141A (en) * | 2019-09-24 | 2019-12-03 | 国网重庆市电力公司电力科学研究院 | A kind of sub- voltage sensor system of Intelligent insulation |
| CN113655262A (en) * | 2021-04-12 | 2021-11-16 | 重庆大学 | Voltage measurement self-decoupling method based on multi-dimensional equivalent capacitance calculation |
| CN113655262B (en) * | 2021-04-12 | 2024-01-16 | 重庆大学 | Voltage measurement self-decoupling method based on multidimensional equivalent capacitance calculation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108802484B (en) | 2020-10-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108802484B (en) | Gas-insulated real-time self-calibration broadband high-voltage measuring device | |
| CN102445581B (en) | Capacitive voltage-division type self-calibration optical voltage transducer | |
| CN201514849U (en) | Composite insulation compensation type electronic voltage transformer | |
| CN105629049A (en) | Gauss quadrature algorithm-based optical voltage transformer | |
| CN103217571B (en) | Differential type D-dot voltage transformer and voltage detecting method thereof | |
| US8519698B2 (en) | Presettable transducer for electrical quantities | |
| JP2002532688A (en) | Voltage sensor | |
| CN106199118B (en) | Capacitor voltage-dividing type zero sequence voltage transformer with power output | |
| CN101576579B (en) | Coaxial-symmetrical discrete capacitive voltage divider used for nanosecond high voltage pulse measurement | |
| CN102426281A (en) | Longitudinal modulation optical voltage sensor | |
| CN206804718U (en) | Solid compound inslation shield type voltage transformer based on coaxial capacitance | |
| CN108828493B (en) | Method for eliminating influence of temperature and other phase electric fields on precision of optical voltage transformer | |
| CN102305883B (en) | High-voltage electric energy metering device | |
| CN106872795A (en) | A kind of system and method for being measured to transient state space electric field | |
| CN113655267B (en) | A spherical six-electrode overvoltage sensor with zero angle deviation measurement | |
| CN114594305A (en) | Differential non-contact voltage sensor | |
| CN102654530A (en) | High-voltage electrode discharge current measuring device | |
| Zhao et al. | Study on performance of novel optical voltage transformer based on current measurement | |
| CN104977449A (en) | An Optical Voltage Transformer Based on SF6 Coaxial Capacitive Voltage Divider | |
| CN208367075U (en) | Individual struts formula optical current voltage combination transformer | |
| CN106405465A (en) | Voltage transformer measurement error checking method | |
| CN205404672U (en) | Optics voltage transformer based on gaussian quadrature algorithm | |
| US11486906B2 (en) | Voltage measuring device and gas-insulated switching apparatus | |
| CN110441575B (en) | A common box type gas-insulated metal-enclosed switchgear GIS electronic voltage transformer | |
| CN108519504B (en) | Independent pillar type optical current and voltage combined transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |