CN202033416U - Electric energy measuring device - Google Patents
Electric energy measuring device Download PDFInfo
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- CN202033416U CN202033416U CN2011200852588U CN201120085258U CN202033416U CN 202033416 U CN202033416 U CN 202033416U CN 2011200852588 U CN2011200852588 U CN 2011200852588U CN 201120085258 U CN201120085258 U CN 201120085258U CN 202033416 U CN202033416 U CN 202033416U
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Abstract
The utility model discloses an electric energy measuring device, comprising an electric energy measuring module, a voltage sensor used for measuring a traction voltage and feeding back to the voltage of a power grid when a regenerative braking is carried out, and a current sensor used for measuring a traction current and a regenerative braking current. The voltage sensor and the current sensor both are connected with an input port of an energy-metering module, the electric energy measuring device can measure the voltage, the current, the positive-going electric energy and the reverse electric energy, display and store the data real timely, provide a USB interface for calling data and provide a 485 interface, a CAN interface and a MVB bus interface to communicate, and has strong practicability.
Description
Technical field
The utility model relates to a kind of electrical quantity measurement arrangement, is particularly useful for the electrical measurement of field of track traffic.
Background technology
At present, national subway train does not all have ammeter, can't add up the electricity consumption situation.The voltage height of subway electrical network, electric current is big, and the development difficulty of electrical measurement equipment is big, with universal meter very big difference is arranged, and ammeter all can only be surveyed alternating current mostly, and is direct current on the subway.
In addition, the most of ammeter in market only can be surveyed the forward electric weight, seldom surveys reverse electric weight, does not almost have and survey positive and negative electric weight simultaneously.
Ammeter on the market, majority are to come power taking amount data with artificial meter reading method, and be promptly inconvenient, occurs human error again easily, causes dispute.
Therefore, be necessary to survey the electrical measurement equipment that alternating current, direct current can be surveyed galvanic forward electric weight, reverse electric weight again at train exploitation one cover.
The utility model content
The utility model wants the technical solution problem to provide a kind of electrical quantity measurement arrangement, this electrical quantity measurement arrangement energy measurement alternating current, direct current, and measure galvanic forward electric weight, reverse electric weight, practical.
The utility model is to solve the problems of the technologies described above the technical scheme that is adopted to be:
A kind of electrical quantity measurement arrangement comprises processor, meter can module, feed back to the voltage sensor of voltage of electrical network and the current sensor that is used to measure traction current and regenerative braking electric current when being used to measure traction voltage and regenerative braking; Voltage sensor and current sensor all join with the input port of counting the energy module.
The voltage sensor model is: NTQG3A, the current sensor model is: NTQG4A.
Described meter can module adopt ADE7753, CS5460 or CS5463.
USB interface is connected with processor.
RS485 interface, CAN interface and MVB interface all join with processor.
Described processor is LPC2138 or LM3S9B95.
Traction voltage is same loop with the voltage that feeds back to electrical network, during train braking, the voltage of train is higher than net and presses, so electric current can feed back to electrical network from train, the direction of voltage direction during still with traction voltage is identical, this moment, the feedback current direction was just in time opposite with the traction current direction, so as long as adopt the current sensor that can survey the both forward and reverse directions electric current just can survey positive and negative electric weight.
Each trailer system in the train or each pantograph are installed 1 voltage sensor, 1 current sensor and 1 electrical measurement module (electrical measurement module comprise processor, meter can module and related communication or transmission interface).Voltage sensor and current sensor utilize hall principle to adopt isolation method to gather voltage signal and current signal, and with signal in current system send to electric weight survey in the module can chip, meter can chip be calculated voltage, electric current, forward electric weight and reverse electric weight automatically.The processor that electric weight is surveyed in the module regularly reads voltage, electric current, forward electric weight and the reverse electric quantity data of meter energy chip, and gathers the time data in the clock chip in real time, forms the electric quantity data record together.Processor is issued display chip for its demonstration with electric quantity data.The electrical measurement module also leaves USB interface, is used for fetching data and downloading.Its theory diagram is seen accompanying drawing 1.
Traction and regenerative braking (brake) are two kinds of different operating states of train.The formula of electric weight: w=u*i*t, w are energy (meter energy chip calculates automatically), and u is voltage (voltage sensor collection), and i is electric current (electrical quantity sensor collection), and t is the time.During traction, train is a consumer, and at this moment, u is for just, and i flow into train from electrical network, and direction is being for just, so this state electric weight w is just (how many electric weight train has imported from electrical network); During regenerative braking (brake), train can be regarded generator as, at this moment, u is being for just, and i flow into electrical network from train (because during regenerative braking, the voltage of train can be than the voltage height of electrical network, so current i can flow into electrical network), direction is for negative, so this state electric weight w is for negative.This two states voltage and current the circuit of process all be the same, can not exist under the synchronization, train promptly flows out electric current to electrical network, again from the electric current input current.In sum, voltage just is always, electric current at traction state for just, electric current at the regenerative braking state for negative, as long as, can just can survey positive electric weight (traction electric weight) and anti-electric weight (feeding back to the electric weight of electrical network) by chip in conjunction with special-purpose meter so select 1 current sensor that can survey reversal for use.
Beneficial effect:
Electrical quantity measurement arrangement of the present utility model has been filled up the blank in train electrical measurement field, adopts voltage sensor and current sensor measurement electric weight, compares manual metering, automaticity height, accuracy height.Voltage sensor and current sensor all adopt Hall magnetic balance type sensor, and electric isolation performance is strong, can guarantee effectively that measurement data is accurate, and the support equipment reliable operation.In addition, this device can be measured forward electric weight and reverse electric weight simultaneously, provides USB interface to fetch data and download, and is therefore powerful.
Description of drawings
Fig. 1 is the electrical quantity measurement arrangement theory diagram;
Fig. 2 is the structural principle block diagram of embodiment 1.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Embodiment 1:
The theory diagram of electrical quantity measurement arrangement has following function as shown in Figure 2: 1, the current signal of high speed acquisition voltage sensor and current sensor output; 2, according to sensor signal, binding time calculates electric weight and forms train electric quantity data record, carries out real-time storage; 3, adopt 8 charactron timesharing to show train traction electric weight, regenerative braking electric weight, voltage and current; 4, provide USB interface, make things convenient for the user to read the electric quantity data record; 5, provide 1 tunnel interface that downloads; 6, reserve 1 road RS485 interface.
Feed back to the voltage of electrical network when adopting Hall high isolation measurement traction voltage of magnetic balance voltage sensor and regenerative braking.And will record signal and send the electrical measurement module to current system.This sensor has the precision height, the advantage that response speed is fast.
Adopt Hall high isolation measurement traction current of magnetic balance current sensor and regenerative braking electric current.And will record signal and send the electrical measurement module to current system.
Present embodiment has following function:
Detect the train electric weight
Modularization idea is adopted in system design, convenient installation, maintenance and maintenance.Select high isolation, high-precision voltage and current sensor measurement electric current and voltage for use, can guarantee the train existing equipment not to be impacted, feed back to the electric weight of electrical network when accurately measuring train traction electric weight and regenerative braking.
Real-time storage and demonstration electric weight;
Equipment is stored voltage, electric current, power and the electric quantity data of this time point at set intervals.Can show information such as train traction electric weight, the electric weight that feeds back to electrical network, voltage and current in real time.
Equipment provides self check and the function that reports an error, and as: communication is unsuccessful, pickup wire does not connect with error in data etc., can reduce the difficulty of plant maintenance greatly.
Claims (6)
1. an electrical quantity measurement arrangement is characterized in that, comprises processor, meter can module, feed back to the voltage sensor of voltage of electrical network and the current sensor that is used to measure traction current and regenerative braking electric current when being used to measure traction voltage and regenerative braking; Voltage sensor and current sensor all join with the input port of counting the energy module.
2. electrical quantity measurement arrangement according to claim 1 is characterized in that, the voltage sensor model is: NTQG3A, the current sensor model is: NTQG4A.
3. electrical quantity measurement arrangement according to claim 1 is characterized in that, described meter can module adopt ADE7753, CS5460 or CS5463.
4. electrical quantity measurement arrangement according to claim 1 is characterized in that USB interface is connected with processor.
5. electrical quantity measurement arrangement according to claim 1 is characterized in that, RS485 interface, CAN interface and MVB interface all join with processor.
6. according to each described electrical quantity measurement arrangement of claim 1-5, it is characterized in that described processor is LPC2138 or LM3S9B95.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200852588U CN202033416U (en) | 2011-03-28 | 2011-03-28 | Electric energy measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200852588U CN202033416U (en) | 2011-03-28 | 2011-03-28 | Electric energy measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202033416U true CN202033416U (en) | 2011-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200852588U Expired - Lifetime CN202033416U (en) | 2011-03-28 | 2011-03-28 | Electric energy measuring device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103645376A (en) * | 2013-11-15 | 2014-03-19 | 益和电气集团股份有限公司 | Digital current voltmeter of wireless transmission signal |
| CN104034960A (en) * | 2014-05-15 | 2014-09-10 | 苏州市万松电气有限公司 | Train-mounted electrical-energy monitoring system with multiple redundancies |
| CN107677886A (en) * | 2017-08-03 | 2018-02-09 | 上海地铁电子科技有限公司 | Railcar trailer system operation energy consumption measurement apparatus and method |
| CN110261664A (en) * | 2019-07-03 | 2019-09-20 | 神州电科科技(北京)有限公司 | A kind of attached wires of AC electrified railway train is by pyroelectric monitor system |
| CN110488088A (en) * | 2019-08-26 | 2019-11-22 | 中车株洲电力机车有限公司 | Rail transit locomotive and the energy measuring method and device run in different sections |
| CN111103010A (en) * | 2018-12-27 | 2020-05-05 | 冯丽雅 | Portable digital display hygrothermograph |
| CN111897277A (en) * | 2020-09-18 | 2020-11-06 | 成都飞英思特科技有限公司 | Electric equipment control system |
-
2011
- 2011-03-28 CN CN2011200852588U patent/CN202033416U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103645376A (en) * | 2013-11-15 | 2014-03-19 | 益和电气集团股份有限公司 | Digital current voltmeter of wireless transmission signal |
| CN104034960A (en) * | 2014-05-15 | 2014-09-10 | 苏州市万松电气有限公司 | Train-mounted electrical-energy monitoring system with multiple redundancies |
| CN107677886A (en) * | 2017-08-03 | 2018-02-09 | 上海地铁电子科技有限公司 | Railcar trailer system operation energy consumption measurement apparatus and method |
| CN111103010A (en) * | 2018-12-27 | 2020-05-05 | 冯丽雅 | Portable digital display hygrothermograph |
| CN110261664A (en) * | 2019-07-03 | 2019-09-20 | 神州电科科技(北京)有限公司 | A kind of attached wires of AC electrified railway train is by pyroelectric monitor system |
| CN110488088A (en) * | 2019-08-26 | 2019-11-22 | 中车株洲电力机车有限公司 | Rail transit locomotive and the energy measuring method and device run in different sections |
| CN111897277A (en) * | 2020-09-18 | 2020-11-06 | 成都飞英思特科技有限公司 | Electric equipment control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111109 |
|
| CX01 | Expiry of patent term |