CN203606404U - Multiple transformation ratio current transformer intelligent control device - Google Patents
Multiple transformation ratio current transformer intelligent control device Download PDFInfo
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- CN203606404U CN203606404U CN201320693505.1U CN201320693505U CN203606404U CN 203606404 U CN203606404 U CN 203606404U CN 201320693505 U CN201320693505 U CN 201320693505U CN 203606404 U CN203606404 U CN 203606404U
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- 230000009466 transformation Effects 0.000 title abstract description 8
- 238000012545 processing Methods 0.000 claims abstract description 14
- HPDFFVBPXCTEDN-UHFFFAOYSA-N copper manganese Chemical compound [Mn].[Cu] HPDFFVBPXCTEDN-UHFFFAOYSA-N 0.000 claims description 12
- 238000005070 sampling Methods 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 description 7
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- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
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- 238000009530 blood pressure measurement Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
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Abstract
The utility model belongs to the field of high-voltage electric energy measuring devices, and specifically discloses a multiple transformation ratio current transformer intelligent control device. The device comprises a parameter module, a central processing module, a storage module, an input module, a display module, a current regulation multiple module, a current transformation ratio switching module, and also comprises a power module which provides operating power for the intelligent control device. The central processing module is connected with each module. Secondary current of the multiple transformation ratio current transformer is connected with input ends of the parameter module, the current regulation multiple module, and the current transformation ratio switching module. Output ends of the current regulation multiple module and the current transformation ratio switching module are connected with current input ends of metering ammeters. The device can output normal electric signals for electric energy meters under conditions of no-load, light load, and overload of the current transformer, ensuring accuracy of metering results, and further preventing related metering devices from being burnt down caused by poor overload capacity of the current transformer, and preventing power failure accidents caused by burning of the related metering devices.
Description
Technical field
The utility model belongs to high-voltage electric energy measurement apparatus field, specifically discloses a kind of variable specific current transformer intelligent controlling device.
Background technology
For a long time, the current ratio that is calculated single no-load voltage ratio and customized current transformer by transformer capacity is continued to use in electric system high pressure measurement always, and current transformer load total current more approaches its ratings, and measuring accuracy is just higher.When loading range is larger, load total current variation range is also larger, when load total current higher than ratings 120% time (now operation of current transformers is in overload), because can making measuring accuracy, the reasons such as magnetic saturation obviously reduce, in the poor situation of part current transformer overload capacity, the even relevant metering outfit of possibility scaling loss, and then cause regional power outage; When load total current lower than current transformer ratings 20% time (now operation of current transformers is in light condition), due to reasons such as resolution step-downs, also can make error in dipping greatly increase, very person cannot measure out.
In sum, provide one can make current transformer under low year, underloading, overload duty, export normal electric signal watt-hour meter metering, the control device that improves current transformer overload capacity becomes those skilled in the art needs the problem of solution badly.
Utility model content
The purpose of this utility model is to provide one can make current transformer in low year, underloading, under overload duty, export normal electric signal watt-hour meter metering, improve the control device of current transformer overload capacity, for achieving the above object, the technical solution of the utility model is: a kind of variable specific current transformer intelligent controlling device, comprise: parameter module, central processing module, memory module, load module, display module, electric current is adjusted multiple module, current switching no-load voltage ratio module, also being included as described intelligent controlling device provides the power module of working power, described central processing module is connected with each module, described variable specific current transformer secondary current connects described parameter module, electric current is adjusted multiple module, current switching no-load voltage ratio module input, and described electric current is adjusted the current input terminal of multiple module, electrical source exchange no-load voltage ratio module output terminal connection metering ammeter.
Preferably, described parameter module comprises the copper-manganese sampling resistor and the A/D modular converter that connect successively.
Preferably, two described variable specific current transformers are connected to A, C phase, it is described variable specific current transformer secondary current S1, S2, S3 line access respectively described intelligent controller s1, s2, s3 input end through auxiliary reclay that described electric current is adjusted multiple module, the 2-5 that described variable specific current transformer secondary side output current large velocity ratio is little no-load voltage ratio doubly, in little no-load voltage ratio S1 circuit, be provided with the second current transformer adapting with large velocity ratio, described the second Current Transformer Secondary electric current, through copper-manganese sampling resistor, amplifying circuit, A/D conversion, is connected to gauging table.
Preferably, two described variable specific current transformers are connected to A, C phase, described current switching no-load voltage ratio module is that described variable specific current transformer secondary current S1, S2, S3 line are changed through copper-manganese sampling resistor, auxiliary reclay, amplifying circuit, A/D, is connected to gauging table.
beneficial effect
Owing to having adopted technique scheme, the utility model compared with prior art advantage is: adopt variable specific current transformer, and select to switch no-load voltage ratio output and adjust two kinds of patterns of multiple output according to user's user demand or loading condition, wherein adjust multiple output mode and adopt the metering of monolithic ammeter, variable specific current transformer and the second operation of current transformers are in same multiplying power, minimizing interference from human factor is checked meter simple and convenient, improves the accuracy of metering result; Switch no-load voltage ratio output mode and adopt two ammeter meterings, load during lower than rated capacity 10% S1, the S2 access ammeter 1 that puts into operation measure, load while exceeding rated capacity 20% S1, the S3 access ammeter 2 that puts into operation measure, two ammeter multiplying powers and load condition adapt, metering result can be reacted the electricity consumption situation by electric unit underload and overload intuitively, is convenient to further power supply unit and carries out data statistic analysis.In the situations such as variable specific current transformer intelligent controlling device described in the utility model is in underload, overload, and load variations is large, and electricity consumption is seasonal strong, can automatically switch to reasonable no-load voltage ratio, effectively reduce the safety of line loss, assurance measuring accuracy and metering outfit.
Adopt 6, the transformer of 1250 kVA in one in experiment, the nominal transformation ratio of corresponding current transformer is 500/5, analogue transformer moves at little electric current (5%) state for a long time in zero load or light condition, current transformer for a long time, the 1-3 month, 11-12 month line loss are 11.2% by statistics, the 4-5 month, 9-10 month line loss are 17%, 6-8 month line loss is 12.8%, after install the current transformer of a 100-500/5A polytropic ratio and the operation of described variable specific current transformer intelligent controlling device additional after one month, line loss is reduced to 3.0%.
Adopt 8, the transformer of 1250 kVA in two in experiment, corresponding current transformer ratio is 75/5; 5, the transformer of 1000 kVA, corresponding current transformer ratio is 60/5; 1, the transformer of 800 kVA, corresponding current transformer ratio is 50/5; 1, the transformer of 630 kVA, corresponding current transformer ratio is 40/5, and simulate day load variations is large, the overload time is long, and evening is without electricity consumption, no-load transformer, the state that electricity consumption seasonality is strong, monthly line loss remains on 8.5% to 10.2% by statistics.After each single transformation ratio current transformer is changed to respectively to 20-100/5,15-75/5,15-75/5,10-50/5 variable specific current transformer equipped described variable specific current transformer intelligent controlling device, line loss is reduced to 4.1%.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model;
Fig. 2 is that the utility model electric current is adjusted multiple output connection figure;
Fig. 3 is that the utility model electric current is adjusted Multiple Principle figure;
Fig. 4 is the utility model current switching no-load voltage ratio output connection figure;
Fig. 5 is the utility model current switching no-load voltage ratio output principle figure;
Fig. 6 is the utility model electrical schematic diagram.
Embodiment
Below in conjunction with specific embodiment, structure of the present utility model and principle are described further, as shown in Figure 1, the utility model comprises: parameter module, central processing module, memory module, load module, display module, electric current are adjusted multiple module, current switching no-load voltage ratio module, and being also included as described intelligent controlling device provides the power module of working power; Described central processing module is connected with each module, described variable specific current transformer secondary current connects described parameter module, electric current is adjusted multiple module, current switching no-load voltage ratio module input, and described electric current is adjusted the current input terminal of multiple module, electrical source exchange no-load voltage ratio module output terminal connection metering ammeter.Described parameter module comprises the copper-manganese sampling resistor and the A/D modular converter that connect successively further; Described memory module is for preserving the input/output information of load module and central processing module, described load module is for the working value of tested electric current, the input of action moment setting value, described display module is for the demonstration of correlation parameter and state of a control, and described power module is used for providing AC220V or AC110V working power.
Variable specific current transformer secondary line accesses the copper-manganese sampling resistor input end of described intelligent controlling device, current signal is become to voltage signal and transfers to A/D modular converter, A/D modular converter voltage signal change into digital signal for central processing module computing and with memory module in the parameter set compare, export two kinds of control models, wherein adjust multiple output mode and adopt the metering of monolithic ammeter, variable specific current transformer and the second operation of current transformers are in same multiplying power, reducing interference from human factor checks meter simple and convenient, improve the accuracy of metering result, switch no-load voltage ratio output mode and adopt two ammeter meterings, load during lower than rated capacity 10% S1, the S2 access ammeter 1 that puts into operation measure, load while exceeding rated capacity 20% S1, the S3 access ammeter 2 that puts into operation measure, two ammeter multiplying powers and load condition adapt, metering result can be reacted the electricity consumption situation by electric unit underload and overload intuitively, be convenient to further power supply unit and carry out data statistic analysis, with the actual power consumption of electric unit be: the large multiplying power of number of degrees * of the little multiplying power+ammeter 2 of number of degrees * of ammeter 1.
Be the first pattern mode of connection as shown in Figure 2, electric current is adjusted 2-5 and is doubly exported, when electric current is adjusted after the instruction that multiple module receives that central processing module sends, the multiple to same large velocity ratio of the second current transformer of automatic adjustment described intelligent controlling device inside and outside variable specific current transformer, and guarantee the reasonable of current transformer ratio, output current signal is for the metering of monolithic ammeter.As shown in accompanying drawing 3 and accompanying drawing 6, outside variable specific current transformer is connected to A, C phase, it is described variable specific current transformer secondary current S1 that described electric current is adjusted multiple module, S2, S3 line accesses respectively the s1 of described intelligent controller through auxiliary reclay, s2, s3 input end, described variable specific current transformer secondary side output current large velocity ratio (S1, S3) be little no-load voltage ratio (S1, S2) 2-5 doubly, in little no-load voltage ratio S1 circuit, be provided with the 2-5 that adapts with large velocity ratio doubly (10/5, 15/5, 20/5, 25/5) the second current transformer, described the second Current Transformer Secondary electric current is through copper-manganese sampling resistor, amplifying circuit, A/D modular converter is connected to gauging table.Electric current in tested s1, by after copper-manganese sampling resistor, is sensed as light current and presses, and is adjusted into the required measuring voltage 0-3V of A/D modular converter through amplifying circuit, judges, controls intermediate relay ZJ by central processing module.Exceed rated capacity 20% when tested electric current is greater than 1A(load) time, the closed access of variable specific current transformer S1, S3 gauging table; Tested electric current is less than 0.5A(and loads lower than rated capacity 10%) time, variable specific current transformer S1, S2 closure, inner described the second current transformer is adjusted into multiplying power access gauging table identical with S1, S3.
Be the second pattern mode of connection as shown in Figure 4, the output of current switching no-load voltage ratio, when current switching no-load voltage ratio module is received after the instruction that central processing module sends, automatic switchover current transformer ratio (the corresponding metering ammeter of each no-load voltage ratio), and guarantee the reasonable of current transformer ratio, in the time that the no-load voltage ratio of certain switching is moved, other no-load voltage ratios are closed automatically.As shown in accompanying drawing 5 and accompanying drawing 6, outside variable specific current transformer is connected to A, C phase, and described current switching no-load voltage ratio module is that described variable specific current transformer secondary current S1, S2, S3 line are connected to gauging table through copper-manganese sampling resistor, auxiliary reclay, amplifying circuit, A/D modular converter.Electric current in tested s1, by after copper-manganese sampling resistor, is sensed as light current and presses, and is adjusted into the required measuring voltage 0-3V of A/D modular converter through amplifying circuit, judges, controls intermediate relay ZJ by central processing unit.Exceed rated capacity 20% when tested electric current is greater than 1A(load) time, make S1, S3 closure, gauging table 1 operation metering; Tested electric current is less than 0.5A(and loads lower than rated capacity 10%) time, auxiliary reclay contact S1, S2 closure, gauging table 2 operation meterings, calculate according to " the large multiplying power of number of degrees * of the little multiplying power+ammeter 2 of number of degrees * of ammeter 1 " by electric unit electricity consumption situation, metering result can be reacted the electricity consumption situation by electric unit underload and overload intuitively, is convenient to further power supply unit and carries out data statistic analysis.
It should be noted that term " first ", " second " are only for describing object herein, and can not be interpreted as indication or hint relative importance, for the ordinary skill in the art, can understand the concrete meaning of above-mentioned term in the utility model depending on concrete condition.
Applied specific embodiment herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment is just for helping to understand method of the present utility model and core concept thereof.The above is only preferred implementation of the present utility model, should be understood that, due to the finiteness of literal expression, and objectively there is unlimited concrete structure, for those skilled in the art, not departing under the prerequisite of the utility model principle, can also make some improvement, retouching or variation, also above-mentioned technical characterictic can be combined by rights; These improve retouching, change or combination, or without improving, the design of utility model and technical scheme are directly applied to other occasion, all should be considered as protection domain of the present utility model.
Claims (4)
1. a variable specific current transformer intelligent controlling device, it is characterized in that, comprise: parameter module, central processing module, memory module, load module, display module, electric current are adjusted multiple module, current switching no-load voltage ratio module, and being also included as described intelligent controlling device provides the power module of working power; Described central processing module is connected with each module, described variable specific current transformer secondary current connects described parameter module, electric current is adjusted multiple module, current switching no-load voltage ratio module input, and described electric current is adjusted the current input terminal of multiple module, electrical source exchange no-load voltage ratio module output terminal connection metering ammeter.
2. a kind of variable specific current transformer intelligent controlling device according to claim 1, is characterized in that, described parameter module comprises the copper-manganese sampling resistor and the A/D modular converter that connect successively.
3. a kind of variable specific current transformer intelligent controlling device according to claim 1, it is characterized in that, two described variable specific current transformers are connected to A, C phase, it is described variable specific current transformer secondary current S1 that described electric current is adjusted multiple module, S2, S3 line accesses respectively the s1 of described intelligent controller through auxiliary reclay, s2, s3 input end, the 2-5 that described variable specific current transformer secondary side output current large velocity ratio is little no-load voltage ratio doubly, in little no-load voltage ratio S1 circuit, be provided with the second current transformer adapting with large velocity ratio, described the second Current Transformer Secondary electric current is through copper-manganese sampling resistor, amplifying circuit, A/D conversion, be connected to gauging table.
4. a kind of variable specific current transformer intelligent controlling device according to claim 1, it is characterized in that, two described variable specific current transformers are connected to A, C phase, described current switching no-load voltage ratio module is that described variable specific current transformer secondary current S1, S2, S3 line are changed through copper-manganese sampling resistor, auxiliary reclay, amplifying circuit, A/D, is connected to gauging table.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320693505.1U CN203606404U (en) | 2013-11-06 | 2013-11-06 | Multiple transformation ratio current transformer intelligent control device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320693505.1U CN203606404U (en) | 2013-11-06 | 2013-11-06 | Multiple transformation ratio current transformer intelligent control device |
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| CN203606404U true CN203606404U (en) | 2014-05-21 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103777046A (en) * | 2013-11-06 | 2014-05-07 | 张泽虎 | Intelligent control device for multi-transformation ratio current transformer |
| CN109541298A (en) * | 2018-11-29 | 2019-03-29 | 宁波三星智能电气有限公司 | A kind of electric energy meter metering method |
| CN113890382A (en) * | 2021-09-22 | 2022-01-04 | 中建五局土木工程有限公司 | Adjustable CT transformation ratio digital controller based on secondary current sampling |
-
2013
- 2013-11-06 CN CN201320693505.1U patent/CN203606404U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103777046A (en) * | 2013-11-06 | 2014-05-07 | 张泽虎 | Intelligent control device for multi-transformation ratio current transformer |
| CN103777046B (en) * | 2013-11-06 | 2016-08-17 | 长沙久信电力设备有限公司 | Variable specific current transformer intelligent controlling device |
| CN109541298A (en) * | 2018-11-29 | 2019-03-29 | 宁波三星智能电气有限公司 | A kind of electric energy meter metering method |
| CN109541298B (en) * | 2018-11-29 | 2020-11-03 | 宁波三星智能电气有限公司 | Electric energy meter metering method |
| CN113890382A (en) * | 2021-09-22 | 2022-01-04 | 中建五局土木工程有限公司 | Adjustable CT transformation ratio digital controller based on secondary current sampling |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: CHANGSHA LONG LETTER ELECTRIC POWER EQUIPMENT CO., LTD. Assignor: Zhang Zehu Contract record no.: 2014430000158 Denomination of utility model: Intelligent control device for multi-transformation ratio current transformer Granted publication date: 20140521 License type: Exclusive License Record date: 20141125 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151229 Address after: Tongzi high tech Development Zone in Hunan province Changsha Po Road 410011 No. 229 Lugu International Industrial Park A-7 building 110, No. 210 Patentee after: CHANGSHA LONG LETTER ELECTRIC POWER EQUIPMENT CO., LTD. Address before: 410000, Changsha, Hunan province Furong district Mars five, 13, 604 rooms Patentee before: Zhang Zehu |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20140521 Effective date of abandoning: 20160817 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |