CN203232076U - Digitized transformer station electric energy meter - Google Patents
Digitized transformer station electric energy meter Download PDFInfo
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- CN203232076U CN203232076U CN 201320288746 CN201320288746U CN203232076U CN 203232076 U CN203232076 U CN 203232076U CN 201320288746 CN201320288746 CN 201320288746 CN 201320288746 U CN201320288746 U CN 201320288746U CN 203232076 U CN203232076 U CN 203232076U
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Abstract
Disclosed in the utility model is a digitized transformer station electric energy meter. The electric energy meter is provided with a protocol interface chip, a clock module, a display module, a button module, a bluetooth communication module, an electric energy storage module, an optical fiber communication module, a mutual back-up power supply module, a control output module, and a power pulse module. Besides, the electric energy meter is also provided with a digital signal central processor that is in control and signal connection with the clock module, the display module, the button module, the bluetooth communication module, the electric energy storage module, the optical fiber communication module, the mutual back-up power supply module, the control output module, and the power pulse module; and the digital signal central processor is in optical fiber connection with a combination unit by a protocol interface chip. And the combination unit is in signal connection with an electronic type current transformer by an ECT and is in signal connection with an electronic type voltage transformer. According to the utility model, the provided digitized transformer station electric energy meter is suitable for serving as an electric energy meter in a digital transformer station in the power industry; the error is small; the reliability and the stability are high; and an error code error can be avoided.
Description
Technical field
The utility model relates to a kind of electric instrument technical field, specifically is that a kind of storage shows electric energy, shows the multifunctional meter meter of electric parameters such as voltage, electric current, power, power factor in real time, especially is applied to the electric energy meter of power industry digital transformer substation.
Background technology
At present, China's conventional substation has following shortcoming with electric energy meter: 1. insulation system complexity, cost height; 2. contain iron core, can't eliminate problems such as CT is saturated, ferroresonance; 3. anti-electromagnetic interference performance is poor, and low-pressure side has the danger of open circuit high pressure; 4. dynamic range is little, and measuring accuracy is low; 4. the current transformer that has needs oil-filled, has danger such as inflammable, explosive; 5. volume is big, Heavy Weight; 6. long-time use error is big, the cable inconsistent fault that causes of ground connection, CT characteristic degradation and characteristic that wears out; 7. transmission error is big.Conventional supervisory system adopts forceful electric power transmission information, and power consumption is big in transmission channel, thereby can produce bigger error in transmission course.8. can not remote transmission signal.To use the cross section big in the conventional supervisory system, the control cable that dielectric level is high, its transmission range is nearer, can not be used for remote information transmission.9. maintenance workload is big.Electromagnetic type or small scale integration debugging and maintenance workload are big, and automaticity is low, and some equipment also is subjected to the influence of environment easily.As little current signal transmission, be subject to electromagnetic environment, the influence of environment temperature.10. the goods and materials waste is big.In the conventional supervisory system, transmission of Information all is man-to-man mode, and electric energy metrical uses independent current transformer, and other equipment can not use.Therefore, need improve with the electric energy meter technology existing power station.
The utility model content
The utility model proposes a kind of digital transformer substation electric energy meter at the deficiencies in the prior art, and this electric energy meter carries out fiber-optic signal with outdoor merge cells and is connected, and merge cells is connected with electronic mutual inductor and obtains voltage, current digital signal.Solve CT dynamic range little and saturation problem and the inconsistent fault that causes of characteristic with adopting electronic mutual inductor essence, guaranteed the reliability of protection from the source.Transmission information is whole after adopting fiber optic network, and the secondary circuit design is greatly simplified, and significantly reduces operation maintenance personnel's misoperation fault, has also thoroughly solved the cable problem of aging, and system reliability is fully ensured.Optical fiber information is transmitted at passage, and a lot of equipment can share.
To achieve these goals, the utility model provides following technical scheme:
The digital transformer substation electric energy meter, it is characterized in that: be provided with the protocol interface chip, clock module, display module, select the key-press module of the Presentation Function of display module, bluetooth communication, the power storage module of storage of electrical energy information, the optical fiber communication module, mutual stand-by power source module, by the unpaid time-consuming cut-out isolating switch of ammeter, realize the control output module of pre paid functionality, regularly export the output pulses module of pulse indicated power, and be provided with metering and the voltage that carries out electric energy, electric current, the digital signal central processing unit that the power electrical quantity calculates, this digital signal central processing unit and above-mentioned clock module and display module, key-press module, bluetooth communication, the power storage module, the optical fiber communication module, mutual stand-by power source module, the control output module, the output pulses module is controlled with signal and is connected, and carries out optical fiber by described protocol interface chip with a merge cells that the voltage and current signal is provided and be connected.
The utility model progress is improved and the additional project of enforcement is:
Described merge cells is connected with digital transformer substation primary side electronic current mutual inductor signal by ECT, and be connected with digital transformer substation primary side electronic type voltage transformer signal by EVT, the signal of current transformer and voltage transformer (VT) induction is delivered to ECT, EVT, merge cells sends synchronizing clock signals, and ECT and EVT send the digital signal of voltage and current respectively and give merge cells.
Digital transformer substation electric energy meter and traditional electrical epiphase ratio mainly contain following advantage:
(1), the error of intelligent substation electric energy metered system is better than traditional transformer station.Numeral input electric energy meter receives the digital stream by the current-voltage sampling point of optical fiber transmission, has avoided the metering system additive error that causes because of secondary current voltage analog signal loss substantially.
(2), the high reliability of digital transformer substation electric energy meter.Adopt optical-fibre communications between numeral input electric energy meter and merge cells or electronic mutual inductor physics, realize complete electrical isolation, guarantee under various complex electromagnetic environments, can not cause the change of digital current, voltage signal transmission.Simultaneously, this table has fully phased out the secondary current input, has effectively eliminated potential safety hazards such as overcurrent or secondary current open circuit.
(3), the high stability of digitalized electrical energy meter.The input of the employing digital signal of ammeter, no analog quantity sample circuit, the influence of effectively avoiding the resistance capacitance variation, drift, electromagnetic interference (EMI) etc. of traditional ammeter Yin Wendu, sample circuit to cause precision in the long-time running.
(4), data reliability.Electric current, voltage digital signal adopt standard agreement to transmit, and receiving end is that electric energy meter can carry out verification to electric current, the voltage signal from mutual inductor or merge cells, the influence of effectively having avoided probable bit error that electric energy metrical is caused.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment
Below in conjunction with drawings and Examples the utility model is further specified: embodiment, referring to figure numbers substation electric energy meter 6, be provided with protocol interface chip 61, clock module 62, display module 63, select the key-press module 64 of the Presentation Function of display module, bluetooth communication 65, the power storage module 66 of storage of electrical energy information, optical fiber communication module 67, mutual stand-by power source module 68, by the unpaid time-consuming cut-out isolating switch of ammeter, realize the control output module 69 of pre paid functionality, regularly export the output pulses module 71 of pulse indicated power, and be provided with metering and the voltage that carries out electric energy, electric current, the digital signal central processing unit 70 that the power electrical quantity calculates, this digital signal central processing unit and above-mentioned clock module and display module, key-press module, bluetooth communication, the power storage module, the optical fiber communication module, mutual stand-by power source module, the control output module, the output pulses module is controlled with signal and is connected, and carries out optical fiber by described protocol interface chip with a merge cells 5 that the voltage and current signal is provided and be connected.Described merge cells is connected with digital transformer substation primary side electronic current mutual inductor 1 signal by ECT3, and is connected with digital transformer substation primary side electronic type voltage transformer 2 signals by EVT4.
Should be pointed out that for those skilled in the art under the prerequisite that does not break away from the utility model principle, can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (2)
1. a digital transformer substation electric energy meter (6), it is characterized in that: be provided with protocol interface chip (61), clock module (62), display module (63), select the key-press module (64) of the Presentation Function of display module, bluetooth communication (65), the power storage module (66) of storage of electrical energy information, optical fiber communication module (67), mutual stand-by power source module (68), by the unpaid time-consuming cut-out isolating switch of ammeter, realize the control output module (69) of pre paid functionality, regularly export the output pulses module (71) of pulse indicated power, and be provided with metering and the voltage that carries out electric energy, electric current, the digital signal central processing unit (70) that the power electrical quantity calculates, this digital signal central processing unit and above-mentioned clock module and display module, key-press module, bluetooth communication, the power storage module, the optical fiber communication module, mutual stand-by power source module, the control output module, the output pulses module is controlled with signal and is connected, and carries out optical fiber by described protocol interface chip with a merge cells (5) that the voltage and current signal is provided and be connected.
2. digital transformer substation electric energy meter according to claim 1, it is characterized in that: described merge cells is connected with digital transformer substation primary side electronic current mutual inductor (1) signal by ECT (3), and is connected with digital transformer substation primary side electronic type voltage transformer (2) signal by EVT (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320288746 CN203232076U (en) | 2013-05-22 | 2013-05-22 | Digitized transformer station electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320288746 CN203232076U (en) | 2013-05-22 | 2013-05-22 | Digitized transformer station electric energy meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203232076U true CN203232076U (en) | 2013-10-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320288746 Expired - Fee Related CN203232076U (en) | 2013-05-22 | 2013-05-22 | Digitized transformer station electric energy meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203232076U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104833846A (en) * | 2015-05-21 | 2015-08-12 | 江阴众和电力仪表有限公司 | Optical fiber current sensor intelligent electric meter |
| CN105182136A (en) * | 2015-09-22 | 2015-12-23 | 中国农业大学 | Electric energy quality measuring device based on bluetooth |
| CN110441563A (en) * | 2019-07-29 | 2019-11-12 | 中国电力科学研究院有限公司 | A kind of intelligent electric energy meter device and communication means based on Bluetooth communication |
-
2013
- 2013-05-22 CN CN 201320288746 patent/CN203232076U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104833846A (en) * | 2015-05-21 | 2015-08-12 | 江阴众和电力仪表有限公司 | Optical fiber current sensor intelligent electric meter |
| CN105182136A (en) * | 2015-09-22 | 2015-12-23 | 中国农业大学 | Electric energy quality measuring device based on bluetooth |
| CN110441563A (en) * | 2019-07-29 | 2019-11-12 | 中国电力科学研究院有限公司 | A kind of intelligent electric energy meter device and communication means based on Bluetooth communication |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131009 Termination date: 20180522 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |