CN204595529U - Two no-load voltage ratio metering intelligent controlling device - Google Patents
Two no-load voltage ratio metering intelligent controlling device Download PDFInfo
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- CN204595529U CN204595529U CN201520296977.2U CN201520296977U CN204595529U CN 204595529 U CN204595529 U CN 204595529U CN 201520296977 U CN201520296977 U CN 201520296977U CN 204595529 U CN204595529 U CN 204595529U
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Abstract
The utility model relates to a kind of two no-load voltage ratio metering intelligent controlling device, include 2 or 3 two transformation ratio current transformer of high voltage, microcomputerized controller, two all single-phase with one the no-load voltage ratio operation circuit of transformation ratio current transformer of each high voltage is electrically connected, single-phase no-load voltage ratio operation circuit comprises measurement mutual inductor, relay node one, relay node two, relay node three, relay node four and high-precision measuring type current transformer, microcomputerized controller detects the two transformation ratio current transformer high-voltage side current value of high voltage in real time by measuring mutual inductor and carries out shoving filtering, if detect, current value is more than or equal to the little no-load voltage ratio rated current upper limit of the two transformation ratio current transformer of high voltage, then device enters large velocity ratio state of a control, otherwise enter little no-load voltage ratio state of a control.This pair of no-load voltage ratio metering intelligent controlling device can make the watt-hour meter measuring device of the two transformation ratio current transformer of employing high voltage realize the automatic switchover of size no-load voltage ratio and single ammeter measuring, to improve measuring accuracy.
Description
Technical field
The utility model relates to a kind of two no-load voltage ratio metering intelligent controlling device, automatically switches and single ammeter measuring for making to adopt the watt-hour meter measuring device of the two transformation ratio current transformer of high voltage to realize size no-load voltage ratio at present, to improve measuring accuracy.
Background technology
There is the large phenomenon of unit customer charge size differences in electric system, especially rural area spring sowing autumn harvest electricity consumption, smelting industry, seasonality go into operation the unit user (its electric pressure is generally 10KV) that the Discontinuous manufacture such as industry runs, these unit customer charge size differences, have even more than 10 times, this causes very large difficulty to the configuration of current transformer.When line current is 20% ~ 120% of ratings time, the precision of current transformer is higher, causes watt metering precision higher, exceeds this scope and then can measure misalignment.When line load electric current lower than ratings 20% time, current transformer exciting current is little, cause the negative sense relative error of metering to increase, and the less error of electric current is larger, cause electric quantity metering leak meter; When line current is greater than 120% of ratings, current transformer saturation effects, causes the negative sense relative error of metering to increase, and electric current more big error is larger, also cause electric quantity metering leak meter.
Two transformation ratio current transformer is adopted to be widen current rating scope, improve the ideal solution of measuring accuracy, measure with current mutual inductor with high transforming ratio when large load operation, measure by little transformation ratio current transformer when Smaller load runs, to realize section metering, ensure the gamut measuring accuracy from small area analysis to big current, be very suitable for the electricity consumption user that load variations is large.But, because two transformation ratio current transformer needs to have a power failure when manually changing no-load voltage ratio, manual patching operations, slewing rate is slow, bring very large difficulty to two applying of transformation ratio current transformer, therefore, adopt two transformation-ratio meter amount controllers of microcomputer automatic control to necessitate.For two transformation ratio current transformer, two transformation-ratio meter amount controllers of current employing microcomputer automatic control have to due to the design problem of its control mode use two watt-hour meter, i.e. large velocity ratio electricity-measuring meter and little no-load voltage ratio electricity-measuring meter, to tackle watt metering when large velocity ratio running status and little no-load voltage ratio running status respectively, two watt-hour meter are used to carry out measuring the realization being both not easy to meter reading and being also unfavorable for automatic data logging.
Utility model content
The technical problems to be solved in the utility model is: provide a kind of two no-load voltage ratio metering intelligent controlling device, automatically switch and single ammeter measuring to make the adopting watt-hour meter measuring device of the two transformation ratio current transformer of high voltage to realize size no-load voltage ratio at present, to improve measuring accuracy.
The utility model solves the technical scheme that its technical matters adopts: a kind of two no-load voltage ratio metering intelligent controlling device, include 2 or 3 two transformation ratio current transformer of high voltage, microcomputerized controller, two all single-phase with one the no-load voltage ratio operation circuit of transformation ratio current transformer of each high voltage is electrically connected, described single-phase no-load voltage ratio operation circuit includes the measurement mutual inductor detecting the two transformation ratio current transformer high-voltage side current value of high voltage, relay node one, relay node two, relay node three, relay node four and high-precision measuring type current transformer, relay node one accesses in the high-voltage side circuit of the two transformation ratio current transformer of high voltage, relay node four accesses in the low voltage side circuit of the two transformation ratio current transformer of high voltage, at the no-load voltage ratio wiring point of the two transformation ratio current transformer of high voltage cut-in relay node two successively to the circuit between its low voltage side terminals, terminals of high-precision measuring type current transformer primary side, terminals of high-precision measuring type Current Transformer Secondary side and relay node three, simultaneously, another terminals of high-precision measuring type current transformer primary side, another terminals of high-precision measuring type Current Transformer Secondary side are connected with two terminals of the relay node one in high voltage pair transformation ratio current transformer high-voltage side circuit respectively, measurement mutual inductor in described each single-phase no-load voltage ratio operation circuit and relay node one, relay node two, relay node three, the control end of relay node four is all electrically connected with microcomputerized controller, microcomputerized controller is with the filtration module that shoves simultaneously, the large velocity ratio (no-load voltage ratio of the P1-P3 end of the two transformation ratio current transformer of Fig. 1 high voltage appearance) of the two transformation ratio current transformer of described high voltage is n: 5, little no-load voltage ratio (no-load voltage ratio of the P1-P2 end of the two transformation ratio current transformer of Fig. 1 high voltage appearance) is n/x: 5, and the no-load voltage ratio of described high-precision measuring type current transformer is x: 1.
Working method and the principle of this pair of no-load voltage ratio metering intelligent controlling device are as follows: make microcomputerized controller pass through to measure mutual inductor and detect the current value of the two transformation ratio current transformer high-voltage side of high voltage in real time and carry out filtering (preventing from frequently carrying out state switching) of shoving, if detect, the current value of the two transformation ratio current transformer high-voltage side of high voltage is more than or equal to the little no-load voltage ratio rated current upper limit of the two transformation ratio current transformer of high voltage, then microcomputerized controller makes relay node one and relay node four simultaneously closed with the no-load voltage ratio state that has high input, and closed moment relay node two also all close with relay node three (to guarantee that high voltage pair transformation ratio current transformer is not opened a way), relay node two and relay node San Tong method disconnect exiting little no-load voltage ratio state (simultaneously also preventing large velocity ratio electric current from flowing through the secondary side of high-precision measuring type current transformer) subsequently, now, no-load voltage ratio by n: 5 is measured by the watt-hour meter be connected with this control device, if detect, the current value of the two transformation ratio current transformer high-voltage side of high voltage is less than the little no-load voltage ratio rated current upper limit of the two transformation ratio current transformer of high voltage, then microcomputerized controller makes relay node two and relay node San Tong method closed to drop into little no-load voltage ratio state, and closed moment relay node one also all close with relay node four (to guarantee that high voltage pair transformation ratio current transformer is not opened a way), relay node one and relay node four disconnect exiting large velocity ratio state (simultaneously also preventing from being short-circuited between the primary side of high-precision measuring type current transformer and secondary side) simultaneously subsequently, now, still the no-load voltage ratio according to n: 5 is measured by the watt-hour meter be connected with this control device, so, by adopting this control device, only need a watt-hour meter can measure for the different no-load voltage ratio states of the two transformation ratio current transformer of high voltage.
The beneficial effects of the utility model are: this pair of no-load voltage ratio metering intelligent controlling device can make to adopt the watt-hour meter measuring device of the two transformation ratio current transformer of high voltage to realize size no-load voltage ratio at present and automatically switch and single ammeter measuring, to improve measuring accuracy, to be convenient to meter reading and automatic data logging; No-load voltage ratio automatic switching procedure only needs a microcomputerized controller to control, and apparatus structure is simple, implementation cost is low, control procedure is stable; And when control device enters large velocity ratio measure control state, large velocity ratio current signal directly exports watt-hour meter to, does not lose galvanometer accuracy of measurement.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Fig. 1 is the utility model is connected when using structural representation (arrow represents signal transmission direction) with three-phase and four-line watt-hour meter.
Fig. 2 be a single-phase no-load voltage ratio operation circuit in the utility model structural representation (draw the two transformation ratio current transformer of a high voltage be attached thereto simultaneously and control the microcomputerized controller of its effect, with make schematic diagram complete, understand; Arrow represents signal transmission direction).
In figure: 1. the single-phase no-load voltage ratio operation circuit 3-1. of two transformation ratio current transformer 2. microcomputerized controllers 3. of high voltage measures mutual inductor 3-2. relay node one 3-3. relay node two 3-4. relay node three 3-5. relay node four 3-6. high-precision measuring type current transformer 4. three-phase and four-line watt-hour meter
Embodiment
A kind of two no-load voltage ratio metering intelligent controlling device, as Fig. 1, shown in Fig. 2, it includes 2 or 3 two transformation ratio current transformer 1 of high voltage, microcomputerized controller 2, two all single-phase with one the no-load voltage ratio operation circuit 3 of transformation ratio current transformer 1 of each high voltage is electrically connected, described single-phase no-load voltage ratio operation circuit 3 includes the measurement mutual inductor 3-1 detecting the two transformation ratio current transformer 1 high-voltage side current value of high voltage, relay node one 3-2, relay node two 3-3, relay node three 3-4, relay node four 3-5 and high-precision measuring type current transformer 3-6, relay node one 3-2 accesses in the high-voltage side circuit of the two transformation ratio current transformer 1 of high voltage, relay node four 3-5 accesses in the low voltage side circuit of the two transformation ratio current transformer 1 of high voltage, at the no-load voltage ratio wiring point of the two transformation ratio current transformer 1 of high voltage cut-in relay node two 3-3 successively to the circuit between its low voltage side terminals, terminals of high-precision measuring type current transformer 3-6 primary side, terminals of high-precision measuring type current transformer 3-6 secondary side and relay node three 3-4, simultaneously, another terminals of high-precision measuring type current transformer 3-6 primary side, another terminals of high-precision measuring type current transformer 3-6 secondary side are connected with two terminals of relay node one 3-2 in high voltage pair transformation ratio current transformer 1 high-voltage side circuit respectively, measurement mutual inductor 3 in each single-phase no-load voltage ratio operation circuit 3 and relay node one 3-2, relay node two 3-3, relay node three 3-4, the control end of relay node four 3-5 is all electrically connected with microcomputerized controller 2, microcomputerized controller 2 is with the filtration module that shoves simultaneously, the large velocity ratio (no-load voltage ratio of the P1-P3 end of the two transformation ratio current transformer of Fig. 2 high voltage appearance) of the two transformation ratio current transformer 1 of high voltage is n: 5, little no-load voltage ratio (no-load voltage ratio of the P1-P2 end of the two transformation ratio current transformer of Fig. 2 high voltage appearance) is n/x: 5, and the no-load voltage ratio of high-precision measuring type current transformer 3-6 is x: 1.
Working method and the principle of this pair of no-load voltage ratio metering intelligent controlling device are as follows: make microcomputerized controller 2 detect the current value of two transformation ratio current transformer 1 high-voltage side of high voltage in real time by measuring mutual inductor 3-1 and carry out shoving filtering, if detect, the current value of two transformation ratio current transformer 1 high-voltage side of high voltage is more than or equal to the rated current upper limit of the little transformation ratio current transformer of the two transformation ratio current transformer 1 of high voltage, then microcomputerized controller 2 makes relay node one 3-2 and relay node four 3-5 simultaneously closed with the no-load voltage ratio state that has high input, and also all close to guarantee that the two transformation ratio current transformer 1 of high voltage is not opened a way at closed moment relay node two 3-3 and relay node three 3-4, relay node two 3-3 and relay node three 3-4 disconnects exiting little no-load voltage ratio state simultaneously subsequently, also prevent large velocity ratio electric current from flowing through the secondary side of high-precision measuring type current transformer 3-6 simultaneously, if detect, the current value of two transformation ratio current transformer 1 high-voltage side of high voltage is less than the rated current upper limit of the little transformation ratio current transformer of the two transformation ratio current transformer 1 of high voltage, then microcomputerized controller 2 makes relay node two 3-3 and relay node three 3-4 simultaneously closed to drop into little no-load voltage ratio state, and also all close to guarantee that the two transformation ratio current transformer 1 of high voltage is not opened a way at closed moment relay node one 3-2 and relay node four 3-5, relay node one 3-2 and relay node four 3-5 disconnects exiting large velocity ratio state simultaneously subsequently, also prevent from being short-circuited between the primary side of high-precision measuring type current transformer 3-6 and secondary side simultaneously.
This pair of no-load voltage ratio metering intelligent controlling device can be connected with three-phase and four-line watt-hour meter and uses, also can be connected with phase three-wire three watt-hour meter and use, when this pair of no-load voltage ratio metering intelligent controlling device to be connected with phase three-wire three watt-hour meter use time, it comprises 2 high voltages pair transformation ratio current transformer and 2 single-phase no-load voltage ratio operation circuits (2 high voltage pair transformation ratio current transformer connect A phase line and the C phase line of electric power system respectively).
Above-described embodiment is only for explaining explanation the utility model, but not the restriction to the utility model rights protection, the change of every any unsubstantiality carried out on the basis of the utility model essence scheme, all should fall in protection domain of the present utility model.
Claims (1)
1. a two no-load voltage ratio metering intelligent controlling device, include 2 or 3 two transformation ratio current transformer (1) of high voltage, microcomputerized controller (2), it is characterized in that: two all single-phase with one the no-load voltage ratio operation circuit (3) of transformation ratio current transformer (1) of each high voltage is electrically connected, described single-phase no-load voltage ratio operation circuit (3) includes the measurement mutual inductor (3-1) detecting two transformation ratio current transformer (1) the high-voltage side current value of high voltage, relay node one (3-2), relay node two (3-3), relay node three (3-4), relay node four (3-5) and high-precision measuring type current transformer (3-6), relay node one (3-2) accesses in the high-voltage side circuit of the two transformation ratio current transformer (1) of high voltage, relay node four (3-5) accesses in the low voltage side circuit of the two transformation ratio current transformer (1) of high voltage, at the no-load voltage ratio wiring point of the two transformation ratio current transformer (1) of high voltage cut-in relay node two (3-3) successively to the circuit between its low voltage side terminals, terminals of high-precision measuring type current transformer (3-6) primary side, terminals of high-precision measuring type current transformer (3-6) secondary side and relay node three (3-4), simultaneously, another terminals of high-precision measuring type current transformer (3-6) primary side, another terminals of high-precision measuring type current transformer (3-6) secondary side are connected with two terminals of the relay node one (3-2) in high voltage pair transformation ratio current transformer (1) high-voltage side circuit respectively, measurement mutual inductor (3) in described each single-phase no-load voltage ratio operation circuit (3) and relay node one (3-2), relay node two (3-3), relay node three (3-4), the control end of relay node four (3-5) is all electrically connected with microcomputerized controller (2), microcomputerized controller (2) is with the filtration module that shoves simultaneously, the large velocity ratio of the two transformation ratio current transformer (1) of described high voltage is n: 5, and little no-load voltage ratio is n/x: 5, and the no-load voltage ratio of described high-precision measuring type current transformer (3-6) is x: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520296977.2U CN204595529U (en) | 2015-05-04 | 2015-05-04 | Two no-load voltage ratio metering intelligent controlling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520296977.2U CN204595529U (en) | 2015-05-04 | 2015-05-04 | Two no-load voltage ratio metering intelligent controlling device |
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| CN204595529U true CN204595529U (en) | 2015-08-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520296977.2U Withdrawn - After Issue CN204595529U (en) | 2015-05-04 | 2015-05-04 | Two no-load voltage ratio metering intelligent controlling device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104991482A (en) * | 2015-05-04 | 2015-10-21 | 保定双寅电气有限公司 | Dual transformation ratio metering intelligent controlling device and control mode thereof |
| CN106154009A (en) * | 2016-08-12 | 2016-11-23 | 山东亿玛信诺电气有限公司 | Wide cut metering current mulual inductor |
-
2015
- 2015-05-04 CN CN201520296977.2U patent/CN204595529U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104991482A (en) * | 2015-05-04 | 2015-10-21 | 保定双寅电气有限公司 | Dual transformation ratio metering intelligent controlling device and control mode thereof |
| CN104991482B (en) * | 2015-05-04 | 2017-10-17 | 保定双寅电气有限公司 | Double no-load voltage ratio metering intelligent controlling devices and its control mode |
| CN106154009A (en) * | 2016-08-12 | 2016-11-23 | 山东亿玛信诺电气有限公司 | Wide cut metering current mulual inductor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150826 Effective date of abandoning: 20171017 |