CN104111367A - Ultra-high voltage direct current voltage transformer - Google Patents
Ultra-high voltage direct current voltage transformer Download PDFInfo
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- CN104111367A CN104111367A CN201410312931.5A CN201410312931A CN104111367A CN 104111367 A CN104111367 A CN 104111367A CN 201410312931 A CN201410312931 A CN 201410312931A CN 104111367 A CN104111367 A CN 104111367A
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- optical fiber
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Abstract
The invention relates to an ultra-high voltage direct current voltage transformer, including a base, a voltage divider, an insulator, a cover plate and fluorescent optical fiber temperature measuring equipment. The voltage divider is arranged in an airtight gas chamber surrounded by the base at the lower end, the insulator in the middle, and the cover plate at the upper end, and the airtight gas chamber is filled with SF gas; the fluorescent optical fiber temperature measuring equipment includes fluorescent optical fiber temperature sensors, an adapter optical fiber, a fluorescent optical fiber temperature measuring instrument, an optical fiber converter and a PC; and the fluorescent optical fiber temperature sensors are uniformly fixed on the voltage divider along a height direction of the voltage divider, and are connected with the adapter optical fiber through a through device fixed on the base in a sealed manner. The temperature of the voltage divider in the airtight gas chamber is monitored in real time through the fluorescent optical fiber temperature measuring equipment that is arranged, and temperature inside the direct current voltage transformer is detected; and in cooperation with the fluorescent optical fiber temperature sensors uniformly fixed on the voltage divider, temperature monitoring can be performed comprehensively and reliably, and the entire temperature monitoring adopts optical signal transmission, and is not affected by high voltage and strong electromagnetic interference.
Description
Technical field
The invention belongs to high-voltage transmission equipment field, relate to a kind of extra-high voltage direct-current voltage transformer (VT).
Background technology
Direct current transportation demonstrates than the more advantage of alternating current at aspects such as high-power UHV (ultra-high voltage) long distance power transmission, cable power transmission and the non-same period of networkings, and DC voltage transformer, as the measurement mechanism of polar curve voltage, is requisite equipment in direct current transportation.DC voltage transformer adopts capacitance-resistance voltage division principle, obtains a little voltage signal, and its partial pressure unit is voltage divider, and voltage divider is made up of a large amount of resistance, electric capacity, and resistance, electric capacity have sufficiently high thermal stability.Because the power of single resistance, electric capacity is certain, along with carrying the raising of piezoelectric voltage grade, resistance, the electric capacity quantity of composition voltage divider increase.When electric pressure is lower, require lower to the thermal stability of resistance, electric capacity; In the time that electric pressure reaches extra-high voltage, voltage divider is made up of a large amount of resistance, electric capacity, its inside will produce a large amount of heats, and the area of dissipation of DC voltage transformer is smaller, to reach temperature after thermal equilibrium higher with environment, the test of the thermal stability to resistance capacitance of bringing due to temperature rise produces thereupon, and the safe reliability that its resistance capacitance uses is also reducing, and the resistance being brought by temperature rise, the accuracy of capacitance measurement are also reducing.Temperature inner in existing monitoring voltage mutual inductor operational process is obtained by thermal simulation method, exist temperature simulation error large, can not Real-Time Monitoring etc. problem.
Summary of the invention
For the problems of the prior art, the invention provides one can Real-Time Monitoring temperature variation, measures extra-high voltage direct-current voltage transformer (VT) accurately.
The present invention is achieved through the following technical solutions:
A kind of extra-high voltage direct-current voltage transformer (VT), comprises base, voltage divider, insulator, cover plate and fluorescence fiber temperature measurement device; Voltage divider is arranged in the sealed gas chamber that the cover plate of insulator, the upper end at base, the middle part of lower end surrounds, the inner SF that fills of sealed gas chamber
6gas; Described fluorescence fiber temperature measurement device comprises the fluorescent optical fiber temperature sensor, switching optical fiber, fluorescence fiber temperature measurement instrument, optic fiber converter and the PC that connect successively; Fluorescent optical fiber temperature sensor is evenly fixed on voltage divider along voltage divider short transverse, and the perforation device being fixed on base by sealing is connected with switching optical fiber.
Preferably, voltage divider lower end is fixed on base, and upper end is fixed on insulator by back up pad; Voltage divider upper end is connected with cover plate by conductor.
Further, voltage divider is made up of some partial pressure unit that are successively installed in series, and each partial pressure unit comprises several resistance and the electric capacity that are arranged in parallel, and resistance and electric capacity both sides are fixed with flange respectively; The flange of each partial pressure unit is docking series connection mutually successively.
Further, fluorescent optical fiber temperature sensor comprises the optical connector, connection optical fiber and the temperature sensing probe that connect successively; Optical connector connects with corresponding perforation device, and temperature sensing probe is fixed on resistance or electric capacity.
Further again, connect optical fiber and comprise optical fiber and be successively set on inner sheath and the spiral sheath of fiber outer layer.
Further again, temperature sensing probe is made up of rare earth temperature sensing material.
Further again, to arrange on the voltage divider total six roots of sensation of fluorescent optical fiber temperature sensor; Two temperature sensing probes are fixed on the resistance and electric capacity in the partial pressure unit on top, on resistance and electric capacity in partial pressure unit in the middle of two temperature sensing probes are fixed on, on resistance and electric capacity in the partial pressure unit bottom two temperature sensing probes are fixed on.
Preferably, connecting device is fixedly connected with base by connecting device plate; Connect device and be fixed on and connect on device plate by threaded hole, and by being set in the sealing gasket sealing connecting on device; Connect between device plate and base fixing by the O-ring seal sealing arranging.
Further, connecting device two ends is optical connector, and inner embedding has the optical module that connects two ends optical connector; The optical connector at two ends connects respectively fluorescent optical fiber temperature sensor and switching optical fiber.
Further again, optical connector adopts ST type optical connector.
Compared with prior art, the present invention has following useful technique effect:
The present invention by the fluorescence fiber temperature measurement device arranging can Real-Time Monitoring sealed gas chamber in the temperature of voltage divider, thereby the temperature of DC voltage transformer inside can be detected; And cooperation is evenly fixed on the fluorescent optical fiber temperature sensor on voltage divider, can carry out reliably temperature monitoring comprehensively, and whole temperature monitoring adopts optical signal transmission, therefore be not subject to the impact of high voltage, strong electromagnetic, can judge accurately whether the temperature detecting has exceeded the normal working temperature of voltage divider, ensure the safe operation of DC voltage transformer; Fluorescent optical fiber temperature sensor is that light signal is delivered to fluorescence fiber temperature measurement instrument through switching optical fiber transmission by the temperature inversion sensing, fluorescence fiber temperature measurement instrument carries out modulation and demodulation to temperature light signal, be transferred to again and in optic fiber converter, carry out opto-electronic conversion, optic fiber converter is transferred to the temperature signal after conversion on PC again, demonstrates the temperature that the inner each fluorescent optical fiber temperature sensor of DC voltage transformer is measured on PC.The present invention not only can be used for extra-high voltage direct-current voltage transformer (VT) to monitor, but also the internal temperature curve can be used in adopting thermal simulation method to obtain is verified.
Further, by the connection setting of voltage divider upper and lower side in sealed gas chamber, ensure to play connection high pressure and ground, played the effect of dividing potential drop.
Further, utilize the voltage divider that is composed in series that flange docks mutually, thereby can adjust the capacity of voltage divider easily, be also beneficial to and safeguard and the layout of fluorescent optical fiber temperature sensor point for measuring temperature
Further, by the combination setting that connects outer fiber sheath, ensured its high temperature resistant and resistance to SF in sealed gas chamber
6gaseous environment, has extended the life-span, has ensured the stability of work, and by the selection to temperature sensing probe, has guaranteed the sensitivity to temperature sense, has shortened the reaction time.
Further, by the even setting to point for measuring temperature, concrete respectively in upper and lower two ends and middle setting, thus can monitor the temperature of the inner different parts of DC voltage transformer, ensure monitoring accurately and reliably.
Further, utilize perforation device plate realize the unified location to some perforation devices and install, can need to adjust according to difference the quantity of perforation device; And ensure to connect the sealing of device plate and base by O-ring seal, utilize sealing gasket to ensure to connect the sealing that device is connected with perforation device plate, thereby make the present invention there is sealing reliably and with long-term, improved the stability of its dividing potential drop performance.
Further, by the setting to the structure that connects device and optical connector, in ensureing sealed gas chamber sealing property, make the easy for installation of fluorescence fiber temperature measurement device and safeguard simply, having improved installation accuracy, having reduced labour intensity.
Brief description of the drawings
Fig. 1 is the structural representation described in example of the present invention.
Fig. 2 is the structure enlarged drawing at I place in Fig. 1.
Fig. 3 is the structural representation of partial pressure unit in example of the present invention.
Fig. 4 is the structural representation of fluorescent optical fiber temperature sensor in example of the present invention.
Fig. 5 is the syndeton schematic diagram that connects device plate in example of the present invention; Wherein 5a is front elevation, the right pseudosection that 5b is 5a.
In figure: 1 is base, 2 is voltage divider, and 3 is insulator, 4 is cover plate, and 5 is fluorescent optical fiber temperature sensor, and 6 for connecting device plate, 7 is switching optical fiber, and 8 is terminal box, and 9 is fluorescence fiber temperature measurement instrument, 10 is light breakout box, and 11 is PC, and 12 is resistance, 13 is electric capacity, and 14 is ST type optical connector, and 15 for connecting optical fiber, 16 is temperature sensing probe, and 17 for connecting device, and 18 is sealing gasket.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail:
A kind of extra-high voltage direct-current voltage transformer (VT) of the present invention, as shown in Figure 1, it comprises base 1, voltage divider 2, insulator 3, cover plate 4 and fluorescence fiber temperature measurement device; Voltage divider 2 is arranged in the sealed gas chamber that the cover plate 4 of insulator 3, the upper end at base 1, the middle part of lower end surrounds, the inner SF that fills of sealed gas chamber
6gas; Described fluorescence fiber temperature measurement device comprises the fluorescent optical fiber temperature sensor 5, switching optical fiber 7, fluorescence fiber temperature measurement instrument 9, optic fiber converter 10 and the PC that connect successively; Fluorescent optical fiber temperature sensor 5 is evenly fixed on voltage divider 2 along voltage divider 2 short transverses, and the perforation device 17 being fixed on base 1 by sealing is connected with switching optical fiber 7.
Wherein, as shown in Figure 1, voltage divider 2 lower ends are fixed on base 1, and upper end is fixed on insulator 3 by back up pad; Voltage divider 2 upper ends are connected with cover plate 4 by conductor; Voltage divider 2 is made up of some partial pressure unit that are successively installed in series, and as shown in Figure 3, each partial pressure unit comprises several resistance and the electric capacity that are arranged in parallel, and resistance and electric capacity both sides are fixed with flange respectively; The flange of each partial pressure unit is docking series connection mutually successively.As shown in Figure 3, fluorescent optical fiber temperature sensor comprises the optical connector, connection optical fiber 15 and the temperature sensing probe 16 that connect successively; Optical connector connects with corresponding perforation device 17, and temperature sensing probe 16 is fixed on resistance or electric capacity.Connecting optical fiber 15 comprises optical fiber and is successively set on the outer field inner sheath 1502 of optical fiber 1501 and spiral sheath 1503.In this preferred embodiment, be made for example with temperature sensing probe 16 by rare earth temperature sensing material and describe.
As shown in Figure 5, the total six roots of sensation of fluorescent optical fiber temperature sensor 5 arranging on voltage divider 2; As shown in Figure 1, two temperature sensing probes 16 are fixed on the resistance and electric capacity in the partial pressure unit on top, on resistance and electric capacity in partial pressure unit in the middle of two temperature sensing probes are fixed on, on resistance and electric capacity in the partial pressure unit bottom two temperature sensing probes are fixed on.
As shown in Figure 5, connecting device 17 is fixedly connected with base 1 by connecting device plate 6; Connect device 17 and be fixed on and connect on device plate 6 by threaded hole, and seal by being set in the sealing gasket 18 connecting on device 17; Connect between device plate 6 and base 1 fixing by the O-ring seal sealing arranging.As shown in Figure 2, connecting device 17 two ends is optical connector, and inner embedding has the optical module that connects two ends optical connector; The optical connector at two ends connects respectively fluorescent optical fiber temperature sensor 5 and switching optical fiber 7.This describes as an example of optical connector employing ST type optical connector 14 example in preferably implementing.
When specific works, referring to Fig. 1 and Fig. 2, DC voltage transformer of the present invention, fluorescent optical fiber temperature sensor 5 will sense that Liu road optical signalling enters fluorescence fiber temperature measurement instrument 9 by connection optical fiber 15, perforation device 17, switching optical fiber 7, fluorescence fiber temperature measurement instrument 9 to temperature signal be coupled, modulation, demodulation, the optical signal transmission obtaining is to optic fiber converter 10, optic fiber converter 10 is transferred on PC 11 after light signal being realized to opto-electronic conversion again, demonstrates the inner each temperature of surveying 1 warm spot of DC voltage transformer on PC 11.Fluorescence fiber temperature measurement instrument 9 can be arranged on the inside of the terminal box 8 of base 1 arranged outside.
Referring to Fig. 3, voltage divider 2 is composed in series by partial pressure unit shown in some joint Fig. 2, and each partial pressure unit comprises several resistance and a Capacitance parallel connection composition, and resistance, electric capacity both sides are fixed with flange, the flange of each partial pressure unit docks mutually, thereby forms voltage divider 2.
Referring to Fig. 1, Fig. 3, described voltage divider 2 is installed in insulator 3, and lower end is fixed on base 1, and upper end is fixed on insulator 3 by back up pad.Voltage divider 2 upper ends are connected with cover plate by conductor, thus play connect high pressure with ground, dividing potential drop effect.
Referring to Fig. 1, Fig. 3, Fig. 5, the total six roots of sensation of described fluorescent optical fiber temperature sensor 5, point for measuring temperature is uniformly distributed along voltage divider 2 short transverses.Two temperature sensing probes 16 are fixed on the resistance 12 and electric capacity 13 on voltage divider 2 tops, two temperature sensing probes 16 are fixed on the resistance 12 and electric capacity 13 in the middle of voltage divider, two temperature sensing probes 16 are fixed on the resistance 12 and electric capacity 13 of voltage divider bottom, thereby can monitor the temperature of the inner different parts of DC voltage transformer.
Referring to Fig. 4, described fluorescent optical fiber temperature sensor 5 is made up of ST type optical connector 14, connection optical fiber 15, temperature sensing probe 16.Connect optical fiber 15 and have inner sheath 1502 and spiral sheath 1503 double shieldings at optical fiber 1501 skins.Temperature sensing probe 16 is rare earth temperature sensing material.
Referring to Fig. 5, connect device 17 and be fixed on and connect on device plate 6 by threaded hole, connect device 17 and seal by sealing gasket 18 with perforation device plate 6.Connect between device plate 6 and base 1 and seal by O-ring seal.Connect device plate 6 and can increase or reduce the quantity that connects device 17 according to the needs of different points for measuring temperature.
Referring to Fig. 5, described perforation device 17 should be served as the transmission channel of fiber-optic signal, be connected with board 19 as mechanical structured member again, therefore, need to be designed to machinery and optical module by connecting device 17, connecting device two ends is ST type optical connector, and one end is used for connecting the ST type optical connector 14 of fluorescent optical fiber temperature sensor 5, and one end is used for connecting the ST type optical connector 14 of outside switching optical fiber 7.Connecting device 17 shells is hardware, and the inner ST type optical connector 14 that embeds optical module connection two ends, because DC voltage transformer inside is SF
6gas, the parts that all whiles are connected with external environment condition with inner plenum all require to have sealing property, and the structure that connects device 17 has made itself to possess sealing reliably and with long-term, and it also has excellent sealing property with being connected of web member.
Setting when specific works to sum up, this temperature measuring equipment of the present invention can detect the temperature of DC voltage transformer inside in real time, judges that whether this temperature has exceeded the normal working temperature of resistance, electric capacity, ensures DC voltage transformer safe operation.Can, for the measurement of the internal temperature of extra-high voltage direct-current voltage transformer (VT) experimental phase, the internal temperature curve that adopts thermal simulation method to obtain be verified, also can, for a long time for extra-high voltage engineering, the safe operation of DC voltage transformer be monitored.Monitoring numerical value accurately and reliably, has high temperature resistant resistance to SF
6the characteristic of environment, and be not subject to the impact of high voltage, strong electromagnetic, reflect accurately the temperature of DC voltage transformer inside.
Above content is in conjunction with concrete preferred implementation further description made for the present invention; can not assert that the specific embodiment of the present invention only limits to this; for general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; can also make some simple deduction or replace, all should be considered as belonging to the present invention and determine scope of patent protection by submitted to claims.
Claims (10)
1. an extra-high voltage direct-current voltage transformer (VT), is characterized in that, comprises base (1), voltage divider (2), insulator (3), cover plate (4) and fluorescence fiber temperature measurement device; Voltage divider (2) is arranged in the sealed gas chamber that the cover plate (4) of insulator (3), the upper end at base (1), the middle part of lower end surrounds, the inner SF that fills of sealed gas chamber
6gas; Described fluorescence fiber temperature measurement device comprises the fluorescent optical fiber temperature sensor (5), switching optical fiber (7), fluorescence fiber temperature measurement instrument (9), optic fiber converter (10) and the PC that connect successively; It is upper that fluorescent optical fiber temperature sensor (5) is evenly fixed on voltage divider (2) along voltage divider (2) short transverse, and the perforation device (17) being fixed on base (1) by sealing is connected with switching optical fiber (7).
2. a kind of extra-high voltage direct-current voltage transformer (VT) according to claim 1, is characterized in that, it is upper that described voltage divider (2) lower end is fixed on base (1), and upper end is fixed on insulator (3) by back up pad; Voltage divider (2) upper end is connected with cover plate (4) by conductor.
3. a kind of extra-high voltage direct-current voltage transformer (VT) according to claim 2, it is characterized in that, described voltage divider (2) is made up of some partial pressure unit that are successively installed in series, each partial pressure unit comprises several resistance and the electric capacity that are arranged in parallel, and resistance and electric capacity both sides are fixed with flange respectively; The flange of each partial pressure unit is docking series connection mutually successively.
4. a kind of extra-high voltage direct-current voltage transformer (VT) according to claim 3, is characterized in that, described fluorescent optical fiber temperature sensor comprises the optical connector, connection optical fiber (15) and the temperature sensing probe (16) that connect successively; Optical connector connects with corresponding perforation device (17), and temperature sensing probe (16) is fixed on resistance or electric capacity.
5. a kind of extra-high voltage direct-current voltage transformer (VT) according to claim 4, it is characterized in that, connect optical fiber (15) and comprise optical fiber and be successively set on the outer field inner sheath of optical fiber (1501) (1502) and spiral sheath (1503).
6. a kind of extra-high voltage direct-current voltage transformer (VT) according to claim 4, is characterized in that, temperature sensing probe (16) is made up of rare earth temperature sensing material.
7. a kind of extra-high voltage direct-current voltage transformer (VT) according to claim 4, is characterized in that, the total six roots of sensation of the upper fluorescent optical fiber temperature sensor (5) arranging of voltage divider (2); Two temperature sensing probes (16) are fixed on resistance (12) in the partial pressure unit on top and electric capacity (13), resistance (12) in partial pressure unit in the middle of two temperature sensing probes (16) are fixed on is upper with electric capacity (13), on resistance (12) and electric capacity (13) in the partial pressure unit bottom two temperature sensing probes (16) are fixed on.
8. a kind of extra-high voltage direct-current voltage transformer (VT) according to claim 1, is characterized in that, connects device (17) and is fixedly connected with base (1) by connecting device plate (6); Connect device (17) and be fixed on and connect device plate (6) above by threaded hole, and by being set in sealing gasket (18) sealing connecting on device (17); Connect between device plate (6) and base (1) fixing by the O-ring seal sealing arranging.
9. a kind of extra-high voltage direct-current voltage transformer (VT) according to claim 8, is characterized in that, described perforation device (17) two ends are optical connector, and inner embedding has the optical module that connects two ends optical connector; The optical connector at two ends connects respectively fluorescent optical fiber temperature sensor (5) and switching optical fiber (7).
10. according to a kind of extra-high voltage direct-current voltage transformer (VT) described in claim 4 or 9, it is characterized in that, described optical connector adopts ST type optical connector (14).
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| CN201410312931.5A CN104111367B (en) | 2014-07-02 | 2014-07-02 | A kind of extra-high voltage direct-current voltage transformer |
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| CN201410312931.5A CN104111367B (en) | 2014-07-02 | 2014-07-02 | A kind of extra-high voltage direct-current voltage transformer |
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| CN104111367A true CN104111367A (en) | 2014-10-22 |
| CN104111367B CN104111367B (en) | 2016-11-23 |
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Cited By (5)
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| CN106468728A (en) * | 2015-08-20 | 2017-03-01 | 中国电力科学研究院 | A kind of divider with temperature monitoring |
| CN107179429A (en) * | 2017-05-09 | 2017-09-19 | 西安交通大学 | A kind of new capacitance-resistance parallel voltage divider |
| CN108091455A (en) * | 2017-11-09 | 2018-05-29 | 西安唯实输配电技术有限公司 | A kind of intelligent insulator with internal flaw monitoring and external pollution degree monitoring |
| CN108414815A (en) * | 2018-01-19 | 2018-08-17 | 四方继保（武汉）软件有限公司 | A kind of Novel DC voltage measuring apparatus |
| WO2019227826A1 (en) * | 2018-05-31 | 2019-12-05 | 全球能源互联网研究院有限公司 | Wideband voltage transformer |
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