CN104081213A - Power measuring apparatus - Google Patents
Power measuring apparatus Download PDFInfo
- Publication number
- CN104081213A CN104081213A CN201280068429.3A CN201280068429A CN104081213A CN 104081213 A CN104081213 A CN 104081213A CN 201280068429 A CN201280068429 A CN 201280068429A CN 104081213 A CN104081213 A CN 104081213A
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- China
- Prior art keywords
- electric power
- phase
- voltage
- current
- measurement
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/06—Arrangements for measuring electric power or power factor by measuring current and voltage
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
Abstract
Provided is a power measuring apparatus which can measure a plurality of kinds of alternating current power at the same time. In the present invention, "correspondence relationship information" stored in a storage unit (6) indicates kinds of alternating current power measured by means of a first circuit (3), a second circuit (4), and a third circuit (5). On the basis of the correspondence relationship information stored in the storage unit (6), an arithmetic processing unit (1) calculates alternating current power by each of the kinds using voltage values measured by means of a voltage measuring unit (2), and current values measured by means of the current measuring units (30, and so on).
Description
Technical field
The present invention relates to be configured to measure the power measurement device that is supplied to instantaneous electric power and the accumulative total electric power amount etc. of load from AC (interchange) electric system.
Background technology
As conventional example, for example, multicircuit electricity dynamometer is described in patent documentation 1.This conventional example comprises: measurement mechanism body, and it is configured to measure respectively the electric power amount of multiple circuit; And one or more unit of setting up, it is connected to this measurement mechanism body.Connect (setting up) to measurement mechanism body by setting up unit, can measure the electric power amount of multiple circuit more than circuit quantity that quantity is equipped with for measurement mechanism body.
Incidentally, in the situation that measuring AC electric power, voltage measurement place and current measurement place are different aspect the type (single-phase or three-phase) of AC electric power and wire laying mode (2 line formulas, 3 line formulas or 4 line formulas).For example, in the case of measuring the AC electric power (the AC electric power of the phase between two lines) of single-phase 2 line formulas, need to measure the voltage between lines of two lines and the electric current of the arbitrary line in these lines of flowing through.For example, in the case of measuring the AC electric power (the AC electric power of the phase between three lines) of unidirectional 3 line formulas, need to measure the voltage between lines between ground wire and two power leads and flow through these two lines electric current separately, and in the case of measuring the AC electric power (the AC electric power of the three-phase between three lines) of three-phase 3 line formulas, need to measure voltage between lines between the line of each phase and the electric current of wantonly two lines in these lines of flowing through.In the case of measuring the AC electric power (the AC electric power of the three-phase between four lines) of three-phase 4 line formulas, need to measure N phase and R mutually between, N phase and S mutually between and voltage between lines between mutually of N phase and T and R phase, S phase and T phase current separately mutually.In addition, except voltage measurement place is different with current measurement place, according to the type of AC electric power, for calculating the also difference of algorithm of instantaneous electric power and accumulative total electric power amount etc.
In the conventional example described in patent documentation 1, measurement mechanism body and set up unit and dispose separately the arithmetic processing section for carrying out the calculating relevant with instantaneous electric power and accumulative total electric power amount etc.But each arithmetic processing section is not all configured to the dissimilar AC electric power of parallel computation.That is to say, for the dissimilar AC electric power of parallel computation, arithmetic processing section need to be obtained with voltage measurement place with the current measurement place relevant information corresponding with the type of AC electric power.But, in the conventional example described in patent documentation 1, measurement mechanism body and set up unit and be not configured to obtain this information.Therefore, the AC electric power of measuring multiple types in the conventional example described in patent documentation 1, number of units that need to be corresponding with the type of AC electric power set up unit.
prior art document
patent documentation
Patent documentation 1: TOHKEMY 2005-55404
Summary of the invention
The present invention makes in view of the above problems, and its objective is the power measurement device that a kind of AC electric power that can the multiple types of parallel measurement is provided.
A kind of power measurement device of the present invention, it is configured to measure the alternating electromotive force of supplying with from AC electric power systems, and described power measurement device is characterised in that and comprises: voltage measurement portion, it is configured to measure the voltage of described alternating electromotive force; Multiple current measurement portion, it is configured to measure the electric current of described alternating electromotive force separately; Storage part, it is configured to store the information of the corresponding relation between described multiple current measurement portion and the type of described alternating electromotive force; And arithmetic processing section, it is configured to the information of the corresponding relation based on storing in described storage part, calculates all types of alternating electromotive force in multiple types with the measured measured current value of magnitude of voltage and described current measurement portion of described voltage measurement portion.
In this power measurement device, preferably, described storage part is configured to the alternating electromotive force for single-phase 2 line formulas, the information that storage is relevant with the place of described voltage measurement portion measuring voltage.
According to power measurement device of the present invention, calculate described multiple kind AC electric power separately due to the information of the corresponding relation between multiple current measurement portions and the type of AC electric power of arithmetic processing section based on storing in storage part, with the measured measured current value of magnitude of voltage and described current measurement portion of described voltage measurement portion, AC electric power that therefore can the multiple types of parallel measurement.
Brief description of the drawings
Fig. 1 is the block diagram that the structure of the embodiment of power measurement device is shown.
Fig. 2 is the process flow diagram of the operation of the arithmetic processing section in the embodiment of explanation power measurement device.
Fig. 3 is the block diagram that the structure of the embodiment of power measurement device is shown.
Embodiment
As shown in Figure 1, the power measurement device M of the present embodiment comprises arithmetic processing section 1, voltage measurement portion 2, the first circuit 3, second circuit 4, tertiary circuit 5, storage part 6, Data Management Department 7, data input/out parts 8 and power supply unit 9 etc.
Voltage measurement portion 2 is configured to export the voltage of the AC electric power AC electric power of three-phase 4 line formulas (this illustrated example for) by making to supply with from electric system, the voltage measurement signal that each phase voltage step-down of R phase, S phase, T phase and N phase obtains to arithmetic processing section 1.
The first circuit 3 comprises three current measurement portions 30,31 and 32, and each current measurement portion 30,31 and 32 is connected with respectively current transformer 33,34 and 35.Second circuit 4 comprises three current measurement portions 40,41 and 42, and each current measurement portion 40,41 and 42 is connected with respectively current transformer 43,44 and 45.Tertiary circuit 5 comprises three current measurement portions 50,51 and 52, and each current measurement portion 50,51 and 52 is connected with respectively current transformer 53,54 and 55.By nine current transformers 33 ..., 55 be mounted to separately arbitrary power lead of R phase, S phase and T phase, and be configured to current measurement portion 30 ..., respective electrical flow measurement portion in 52 supplies with and the proportional secondary current of phase current of the corresponding power lead of flowing through.These nine current measurement portions 30 ..., 52 comprise separately for by corresponding current transformer 33 ..., 55 secondary current converts the resistor (not shown) of voltage to, and will export arithmetic processing section 1 to by the current measurement signal that voltage signal is converted to.
Arithmetic processing section 1 mainly comprises microcomputer.Will from nine current measurement portions 30 ..., 52 current measurement signal and input to multiple input ports of the microcomputer of arithmetic processing section 1 from the voltage measurement signal of voltage measurement portion 2.Arithmetic processing section 1 is configured to convert the current measurement signal of inputting via these input ports and voltage measurement signal current value and the magnitude of voltage of digital format to, and uses obtained current value and magnitude of voltage to calculate instantaneous electric power and accumulative total electric power amount etc.
Data Management Department 7 comprises the nonvolatile semiconductor memory (such as flash memory etc.) of electrically rewritable, and is configured to store the result of calculation (such as instantaneous electric power and accumulative total electric power amount etc.) of arithmetic processing section 1.Data input/out parts 8 comprises liquid crystal display, storage card slot and/or the general data transmission circuit with touch panel, and be configured to the result of calculation of arithmetic processing section 1 to be presented in liquid crystal display, this result is write to storage card, and/or this result is transferred to external device (ED).
Storage part 6 comprises the nonvolatile semiconductor memory (such as flash memory etc.) of electrically rewritable, and be configured to store multiple current measurement portion 30 ..., 52 and the type of AC electric power between the information of corresponding relation.Power supply unit 9 is configured to generate DC (direct current) electric power according to the AC electric power of supplying with from electric system, and generated DC electric power is supplied to each assembly 1～8 as work with electric power.
" information of corresponding relation " of in storage part 6, storing specifies the type of utilizing the AC electric power that the first circuit 3, second circuit 4 and tertiary circuit 5 will measure separately.For example, in the example of Fig. 1, the first circuit 3 is designed to measure in place the AC electric power of three-phase 4 line formulas, and second circuit 4 and tertiary circuit 5 are designed to measure in three places the AC electric power of single-phase 2 line formulas separately.Therefore, in this example, storage part 6 storages following " information of corresponding relation ", are wherein somebody's turn to do " information of corresponding relation " expression " the first circuit 3 is measured the AC electric power of three-phase 4 line formulas in a place ", " second circuit 4 is measured the AC electric power of single-phase 2 line formulas in three places " and " tertiary circuit 5 is measured the AC electric power of single-phase 2 line formulas in three places ".Note, should " information of corresponding relation " input from outside via data input/out parts 8, and be written into storage part 6 via arithmetic processing section 1.
The operation of arithmetic processing section 1 then, is described with reference to the process flow diagram of Fig. 2.Arithmetic processing section 1 is obtained " information of corresponding relation " relevant with the first circuit 3, the example of Fig. 1, is obtained the information in expression " the AC electric power of three-phase 4 line formulas, a place " from storage part 6.The information of arithmetic processing section 1 based on accessed, use the phase voltage of the measured each phase of the current value of each phase current of three current measurement portions 30,31 and 32 of the first circuit 3 measured T phase, S phase and R phase and voltage measurement portion 2, calculate instantaneous electric power and the accumulative total electric power amount etc. of the AC electric power of three-phase 4 line formulas.Subsequently, arithmetic processing section 1 is obtained " information of corresponding relation " relevant with second circuit 4, the example of Fig. 1, is obtained the information in expression " the AC electric power of single-phase 2 line formulas, three places " from storage part 6.The information of arithmetic processing section 1 based on accessed, use the phase voltage of the measured each phase of the current value of the measured each phase current of three current measurement portions 40,41 and 42 of second circuit 4 and voltage measurement portion 2, for the instantaneous electric power of each AC electric power that calculates mutually single-phase 2 line formulas and electric power amount etc. totally.Then, arithmetic processing section 1 is obtained " information of corresponding relation " relevant with tertiary circuit 5, the example of Fig. 1, is obtained the information in expression " the AC electric power of single-phase 2 line formulas, three places " from storage part 6.Here, note, in the case of measuring the AC electric power of single-phase 2 line formulas, storage part 6 also stores the corresponding relation between the current measurement place of each current measurement portion 40,41,42,50,51 and 52 and the voltage measurement place of voltage measurement portion 2.For example, according to second circuit 4, make current measurement portion 40 relevant to the voltage (phase voltage) of R phase, make current measurement portion 41 relevant to the voltage (phase voltage) of T phase, and make current measurement portion 42 relevant to the voltage (phase voltage) of S phase, and these corresponding relations are stored in storage part 6.
Then, the information of arithmetic processing section 1 based on accessed, use the phase voltage of the measured each phase of the current value of the measured each phase current of three current measurement portions 50,51 and 52 of tertiary circuit 5 and voltage measurement portion 2, for the instantaneous electric power of each AC electric power that calculates mutually single-phase 2 line formulas and electric power amount etc. totally.The result of calculation (such as instantaneous electric power and accumulative total electric power amount etc.) that arithmetic processing section 1 obtains each circuit 3～5 is stored in Data Management Department 7.
As mentioned above, due to arithmetic processing section 1 be configured to the corresponding relation based on storing in storage part 6 information, use the measured magnitude of voltage of voltage measurement portion 2 and current measurement portion 30 ... measured current value calculates multiple types AC electric power separately, AC electric power that therefore can the multiple types of parallel measurement.In addition, owing to utilizing a power measurement device M to carry out the AC electric power of the multiple types of parallel measurement, therefore compared with the conventional example of the AC electric power by carry out the multiple types of parallel measurement with many table apparatus, can suppress the skew of the error of voltage measurement and/or the processing of power system calculation timing.In addition,, owing to can utilizing a power measurement device M to carry out the AC electric power of the multiple types of parallel measurement, therefore, compared with the conventional example of needs at least two table apparatus, can reduce the required cost of power measurement and reduce installation site.
The power measurement device M of the present embodiment is not limited to the example of the AC electric power of parallel measurement three-phase 4 line formulas shown in Fig. 1 and the AC electric power of single-phase 2 line formulas.For example, power measurement device M can be configured to AC electric power or the AC electric power of parallel measurement three-phase 3 line formulas and/or the AC electric power of single-phase 3 line formulas nine single-phase 2 line formulas of place parallel measurement as shown in Figure 3.
Claims (2)
1. a power measurement device, it is configured to measure the alternating electromotive force of supplying with from AC electric power systems, and described power measurement device is characterised in that and comprises:
Voltage measurement portion, it is configured to measure the voltage of described alternating electromotive force;
Multiple current measurement portion, it is configured to measure the electric current of described alternating electromotive force separately;
Storage part, it is configured to store the information of the corresponding relation between described multiple current measurement portion and the type of described alternating electromotive force; And
Arithmetic processing section, it is configured to the information of the corresponding relation based on storing in described storage part, calculates all types of alternating electromotive force in multiple types with the measured measured current value of magnitude of voltage and described current measurement portion of described voltage measurement portion.
2. power measurement device according to claim 1, is characterized in that, described storage part is configured to the alternating electromotive force for single-phase 2 line formulas, the information that storage is relevant with the place of described voltage measurement portion measuring voltage.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2012/053212 WO2013121499A1 (en) | 2012-02-13 | 2012-02-13 | Power measuring apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104081213A true CN104081213A (en) | 2014-10-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280068429.3A Pending CN104081213A (en) | 2012-02-13 | 2012-02-13 | Power measuring apparatus |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104081213A (en) |
| WO (1) | WO2013121499A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6198679B2 (en) * | 2014-06-06 | 2017-09-20 | 三菱電機株式会社 | Multi-circuit power measuring device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4083000A (en) * | 1976-09-07 | 1978-04-04 | Sangamo Weston, Inc. | Rotating disc multielement polyphase meter |
| CN86208293U (en) * | 1986-11-03 | 1987-06-17 | 北京农业工程大学 | Intelligent electrical load tester |
| CN1091833A (en) * | 1993-03-02 | 1994-09-07 | 潍坊电子器材组装厂 | Watt-hour meter time-sharing recording and load control unit |
| JP2005055404A (en) * | 2003-08-07 | 2005-03-03 | Matsushita Electric Works Ltd | Multi-circuit watt-hour meter and extension unit of multi-circuit watt-hour meter |
| JP2010197223A (en) * | 2009-02-25 | 2010-09-09 | Hioki Ee Corp | Wattmeter |
| CN201654088U (en) * | 2010-03-19 | 2010-11-24 | 内江电业局 | Multi-path real-time synchronous parallel electric energy acquisition device |
| CN201945630U (en) * | 2010-12-20 | 2011-08-24 | 杭州海兴电力科技有限公司 | Multifunctional intelligent electric energy meter |
-
2012
- 2012-02-13 WO PCT/JP2012/053212 patent/WO2013121499A1/en active Application Filing
- 2012-02-13 CN CN201280068429.3A patent/CN104081213A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4083000A (en) * | 1976-09-07 | 1978-04-04 | Sangamo Weston, Inc. | Rotating disc multielement polyphase meter |
| CN86208293U (en) * | 1986-11-03 | 1987-06-17 | 北京农业工程大学 | Intelligent electrical load tester |
| CN1091833A (en) * | 1993-03-02 | 1994-09-07 | 潍坊电子器材组装厂 | Watt-hour meter time-sharing recording and load control unit |
| JP2005055404A (en) * | 2003-08-07 | 2005-03-03 | Matsushita Electric Works Ltd | Multi-circuit watt-hour meter and extension unit of multi-circuit watt-hour meter |
| JP2010197223A (en) * | 2009-02-25 | 2010-09-09 | Hioki Ee Corp | Wattmeter |
| CN201654088U (en) * | 2010-03-19 | 2010-11-24 | 内江电业局 | Multi-path real-time synchronous parallel electric energy acquisition device |
| CN201945630U (en) * | 2010-12-20 | 2011-08-24 | 杭州海兴电力科技有限公司 | Multifunctional intelligent electric energy meter |
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| Publication number | Publication date |
|---|---|
| WO2013121499A1 (en) | 2013-08-22 |
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Effective date of registration: 20160202 Address after: Osaka Japan Applicant after: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT Co.,Ltd. Address before: Osaka Japan Applicant before: Matsushita Electric Industrial Co.,Ltd. |
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Application publication date: 20141001 |