CN202502175U - Overvoltage transmission test system based on CVT - Google Patents
Overvoltage transmission test system based on CVT Download PDFInfo
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- CN202502175U CN202502175U CN2012201074193U CN201220107419U CN202502175U CN 202502175 U CN202502175 U CN 202502175U CN 2012201074193 U CN2012201074193 U CN 2012201074193U CN 201220107419 U CN201220107419 U CN 201220107419U CN 202502175 U CN202502175 U CN 202502175U
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Abstract
The utility model relates to an overvoltage transmission test system based on a CVT. The overvoltage transmission test system comprises a CVT, a digital oscilloscope, an impulse voltage divider and an impulse voltage test device, wherein the CVT is connected with the digital oscilloscope, the impulse voltage divider and the impulse voltage test device respectively, the digital oscilloscope is connected with the impulse voltage divider, and the impulse voltage divider is connected with the impulse voltage test device. The CVT comprises a high-voltage capacitor, an intermediate-voltage capacitor, a low-voltage capacitor, a grounding knife switch, a ball-shaped gap, a lightning arrester, a compensation reactor and an intermediate transformer, wherein the high-voltage capacitor, the intermediate capacitor and the low-voltage capacitor are successively connected in series, the grounding knife switch and the ball-shaped gap are respectively connected in parallel at two ends of the low-voltage capacitor, and the lightning arrester and the compensation reactor are connected in series and thereafter are connected in parallel at the two ends of the low-voltage capacitor. Compared with the prior art, the overvoltage transmission test system based on the CVT of the utility model has the advantages of high sensitivity, structural simplicity and the like.
Description
Technical field
The utility model relates to a kind of superpotential pilot system of electric system, especially relates to a kind of transmission superpotential pilot system based on CVT.
Background technology
At present, inner along with power system development in electric system, recognized transient state process of electric power system very early, i.e. Hyper-Voltage of Power Systems is to the influence of insulation of electrical installation.Therefore very necessary when monitoring in real time for the superpotential of electrical network, also received people's attention.
Capacitance type potential transformer (CVT) is to extract voltage by series capacitor; Again through the voltage transformer (VT) of transformer transformation as the voltage source of table meter, relay protection etc., capacitance type potential transformer can also be coupled to power transmission line with carrier frequency and be used for long distance communication, distant place measurement, optionally circuit carrier current protection, remote control, telex etc.Therefore compare with conventional electromagnetic potential transformer, the capacitance type potential transformer device is except that preventing because of the voltage transformer (VT) core sataration causes the ferroresonance on economical and safety, to also have a lot of superior parts.So far still CVT is not used to transmit the technology report of superpotential pilot system.
The utility model content
The purpose of the utility model is exactly to provide a kind of highly sensitive, the transmission superpotential pilot system based on CVT simple in structure for the defective that overcomes above-mentioned prior art existence.
The purpose of the utility model can realize through following technical scheme:
A kind of transmission superpotential pilot system based on CVT; Comprise CVT, digital oscilloscope, surge voltage voltage divider and impulse voltage test equipment; Described CVT is connected with digital oscilloscope, surge voltage voltage divider, impulse voltage test equipment respectively; Described digital oscilloscope is connected with the surge voltage voltage divider, and described surge voltage voltage divider is connected with impulse voltage test equipment.
Described CVT comprises high-voltage capacitance, middle piezoelectricity appearance, low-voltage capacitance, ground connection disconnecting link, sphere gap, lightning arrester, compensation reactor and medium voltage device; Described high-voltage capacitance, middle piezoelectricity hold, low-voltage capacitance is connected successively; Described ground connection disconnecting link, sphere gap are connected in parallel on the low-voltage capacitance two ends respectively; Be connected in parallel on the low-voltage capacitance two ends after described lightning arrester, the compensation reactor series connection; The primary coil one of described intermediate transformer terminates between high-voltage capacitance, the middle piezoelectricity appearance, and the other end is connected between lightning arrester, the compensation reactor, and the secondary coil of described intermediate transformer is connected on the digital oscilloscope.
Described surge voltage voltage divider comprises the first dividing potential drop electric capacity and the second dividing potential drop electric capacity that connects successively; The described first dividing potential drop electric capacity is connected with high-voltage capacitance, impulse voltage test equipment respectively; The described second dividing potential drop capacity earth, described digital oscilloscope are connected between the first dividing potential drop electric capacity and the second dividing potential drop electric capacity.
Compared with prior art, the utility model is highly sensitive, and is simple in structure.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Among the figure: the C1-high-voltage capacitance, piezoelectricity holds among the C2-, C3-low-voltage capacitance, the C4-first dividing potential drop electric capacity; The C5-second dividing potential drop electric capacity, K-ground connection disconnecting link, P-sphere gap; The L-compensation reactor, BL-lightning arrester, DPO-digital oscilloscope; S-impulse voltage test equipment, F-surge voltage voltage divider, T-medium voltage device.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is elaborated.
Embodiment
As shown in Figure 1; A kind of transmission superpotential pilot system based on CVT; Comprise CVT, digital oscilloscope DPO, surge voltage voltage divider F and impulse voltage test equipment S; Described CVT is connected with digital oscilloscope DPO, surge voltage voltage divider F, impulse voltage test equipment S respectively, and described digital oscilloscope DPO is connected with surge voltage voltage divider F, and described surge voltage voltage divider F is connected with impulse voltage test equipment S.
Described CVT comprises that high-voltage capacitance C1, middle piezoelectricity hold C2, low-voltage capacitance C3, ground connection disconnecting link K, sphere gap P, lightning arrester BL, compensation reactor L and medium voltage device T; Described high-voltage capacitance C1, middle piezoelectricity hold C2, low-voltage capacitance C3 connects successively; Described ground connection disconnecting link K, sphere gap P are connected in parallel on low-voltage capacitance C3 two ends respectively; Be connected in parallel on low-voltage capacitance C3 two ends after described lightning arrester BL, the compensation reactor L series connection; The primary coil one of described intermediate transformer T terminates at high-voltage capacitance C1, middle piezoelectricity holds between the C2; The other end is connected between lightning arrester BL, the compensation reactor L, and the secondary coil of described intermediate transformer T is connected on the digital oscilloscope DPO.
Described surge voltage voltage divider F comprises the first dividing potential drop capacitor C 4 and the second dividing potential drop capacitor C 5 that connects successively; The described first dividing potential drop capacitor C 4 is connected with high-voltage capacitance C1, impulse voltage test equipment S respectively; The described second dividing potential drop capacitor C, 5 ground connection, described digital oscilloscope DPO is connected between the first dividing potential drop capacitor C 4 and the second dividing potential drop capacitor C 5.
Surge voltage voltage divider F is a resistance-capacitance type, and in test as standard voltage divider, its voltage that obtains is as the input signal of CVT high-pressure side, and impulse voltage test equipment S is 3200KV, and system's ceiling voltage of CVT is 550KV.Selected for use respectively in the low-voltage capacitance C3 test to carry and surveyed harmonic wave electric capacity (about 20uF) and the noninductive electric capacity of homemade high capacity high frequency (about 18 μ F) through probe decay in 100: 1, (1a 1n) popped one's head in through 10: 1 and decays and the output of medium voltage device T leading-out terminal has been selected.DPO is digital oscilloscope TDS644B, and the high sampling rate of single channel is greater than 5GSa/s, 1GHz analog bandwidth, sensitivity 1mV/div.
Claims (3)
1. transmission superpotential pilot system based on CVT; It is characterized in that; Comprise CVT, digital oscilloscope, surge voltage voltage divider and impulse voltage test equipment; Described CVT is connected with digital oscilloscope, surge voltage voltage divider, impulse voltage test equipment respectively, and described digital oscilloscope is connected with the surge voltage voltage divider, and described surge voltage voltage divider is connected with impulse voltage test equipment.
2. a kind of transmission superpotential pilot system according to claim 1 based on CVT; It is characterized in that; Described CVT comprises high-voltage capacitance, middle piezoelectricity appearance, low-voltage capacitance, ground connection disconnecting link, sphere gap, lightning arrester, compensation reactor and medium voltage device; Described high-voltage capacitance, middle piezoelectricity hold, low-voltage capacitance is connected successively; Described ground connection disconnecting link, sphere gap are connected in parallel on the low-voltage capacitance two ends respectively, are connected in parallel on the low-voltage capacitance two ends after described lightning arrester, the compensation reactor series connection, and the primary coil one of described intermediate transformer terminates between high-voltage capacitance, the middle piezoelectricity appearance; The other end is connected between lightning arrester, the compensation reactor, and the secondary coil of described intermediate transformer is connected on the digital oscilloscope.
3. a kind of transmission superpotential pilot system according to claim 2 based on CVT; It is characterized in that; Described surge voltage voltage divider comprises the first dividing potential drop electric capacity and the second dividing potential drop electric capacity that connects successively; The described first dividing potential drop electric capacity is connected with high-voltage capacitance, impulse voltage test equipment respectively, and the described second dividing potential drop capacity earth, described digital oscilloscope are connected between the first dividing potential drop electric capacity and the second dividing potential drop electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201074193U CN202502175U (en) | 2012-03-20 | 2012-03-20 | Overvoltage transmission test system based on CVT |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201074193U CN202502175U (en) | 2012-03-20 | 2012-03-20 | Overvoltage transmission test system based on CVT |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202502175U true CN202502175U (en) | 2012-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012201074193U Expired - Lifetime CN202502175U (en) | 2012-03-20 | 2012-03-20 | Overvoltage transmission test system based on CVT |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487636A (en) * | 2013-09-23 | 2014-01-01 | 国家电网公司 | Cvt transient over-voltage sensor |
| CN104502880B (en) * | 2014-12-12 | 2018-03-30 | 国家电网公司 | A kind of equivalent test circuit of can type capacitor voltage mutual inductor transient characterisitics |
-
2012
- 2012-03-20 CN CN2012201074193U patent/CN202502175U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487636A (en) * | 2013-09-23 | 2014-01-01 | 国家电网公司 | Cvt transient over-voltage sensor |
| CN104502880B (en) * | 2014-12-12 | 2018-03-30 | 国家电网公司 | A kind of equivalent test circuit of can type capacitor voltage mutual inductor transient characterisitics |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121024 |
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| CX01 | Expiry of patent term |