CN109116098A - A kind of multi-loop electric tolerance detection system - Google Patents
A kind of multi-loop electric tolerance detection system Download PDFInfo
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- CN109116098A CN109116098A CN201811174154.7A CN201811174154A CN109116098A CN 109116098 A CN109116098 A CN 109116098A CN 201811174154 A CN201811174154 A CN 201811174154A CN 109116098 A CN109116098 A CN 109116098A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
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Abstract
The invention discloses a kind of multi-loop electric tolerance detection systems, comprising: voltage measuring apparatus pre-processes the bus voltage signal of the current period of pre-acquiring, obtains Synchronous Sampling Pulse signal, and be transmitted to signal transmission bus；Signal transmission bus broadcasts Synchronous Sampling Pulse signal；After voltage measuring apparatus receives the signal, according to the signal, synchronized sampling interrupt signal is generated；According to synchronized sampling interrupt signal, the bus voltage signal of current period is sampled, obtains voltage sample value；Voltage sample value is broadcasted by signal transmission bus；Each of at least one current measuring device current measuring device according to Synchronous Sampling Pulse signal, generates synchronized sampling interrupt signal respectively；According to synchronized sampling interrupt signal, electric loop electric current corresponding with itself on the same bus of the current period of pre-acquiring is sampled, obtains current sampling data；According to current sampling data and voltage sample value, electrical quantity is calculated.
Description
Technical field
The present invention relates to technical field of electricity, and in particular to a kind of multi-loop electric tolerance detection system.
Background technique
Traditional power equipment measuring system or multifunction instrument mostly use the mode of independent acquisition and installation, between each other
It is completely independent.The acquisition of corresponding voltage and electric current etc. is also to use the acquisition mode towards electrical separation.And the electricity in order to obtain
The related measurement datas such as voltage, power, the electrical energy measurement at gas interval would have to busbar voltage lead to each measuring system
Or on the voltage input-terminal of multifunction instrument.When needing multiple electricity on the electrical cabinet or control cabinet under same bus
It, will be accordingly in each measuring system or the voltage end of multifunction instrument when gas interval or multiple disengaging line loops measure
Between son and busbar voltage, a large amount of secondary cable is arranged.This had both not only increased cost of investment or will increase construction working
Amount.
Summary of the invention
The embodiment of the present invention is designed to provide a kind of multi-loop electric tolerance detection system, to solve existing measurement system
System or multifunction instrument multiple electrical separations or multiple inlet-outlet lines on to the electrical cabinet or control cabinet under same bus
When circuit measures, need to arrange a large amount of secondary cable, caused by cost of investment it is high, increase asking for construction workload etc.
Topic.
To achieve the above object, the embodiment of the present invention provides a kind of multi-loop electric tolerance detection system, which includes:
Voltage measuring apparatus, at least one current measuring device and signal transmission bus；
Signal transmission bus establishes the communication connection between voltage measuring apparatus and at least one current measuring device；
Voltage measuring apparatus after the bus voltage signal of the current period for pre-acquiring is pre-processed, is obtained and is synchronized
Sampling pulse signal；Synchronous Sampling Pulse signal is transmitted to signal transmission bus；
Signal transmission bus, for broadcasting Synchronous Sampling Pulse signal；
Voltage measuring apparatus is also used to, and after receiving Synchronous Sampling Pulse signal, according to Synchronous Sampling Pulse signal, is generated same
Walk Sampling interrupt signal；According to synchronized sampling interrupt signal, the bus voltage signal of current period is sampled, obtains voltage
Sampled value；Voltage sample value is broadcasted by signal transmission bus；
Each of at least one current measuring device current measuring device is respectively used to, and is believed according to Synchronous Sampling Pulse
Number, generate synchronized sampling interrupt signal；According to synchronized sampling interrupt signal, to the same bus of the current period of pre-acquiring with from
The electric current of the corresponding electric loop of body is sampled, and current sampling data is obtained；According to current sampling data and voltage sample value, calculate
The electrical quantity of electric loop corresponding with current measuring device, each of at least one current measuring device current measuring device
The electric current of different electric loops on same bus is sampled respectively.
The embodiment of the present invention has the advantages that can be total to Synchronous Sampling Pulse signal by signal transmission bus
It enjoys, voltage measuring apparatus and current measuring device is facilitated to obtain Synchronous Sampling Pulse signal.Voltage measuring apparatus and current measurement
Device according to Synchronous Sampling Pulse signal, generates synchronized sampling interrupt signal respectively, is then interrupted and is believed according to synchronized sampling respectively
Number bus voltage signal is sampled or the current signal of the different electric loops of same bus is sampled.Realize signal sampling
It is synchronous, convenient for the subsequent electrical quantity that can accurately calculate electric loop.Voltage measuring apparatus is direct by the voltage signal of acquisition
It is shared by signal transmission bus, facilitates each current measuring device that can obtain simultaneously.Pass through above-mentioned shared side
Formula can only arrange a small amount of secondary cable, measure multiple electric equipment compartments on an electrical cabinet or the control cabinet under same bus
Every or multiple inlet-outlet line electric loops electrical quantity.Without in each measuring system or multifunction instrument voltage terminal with
Between busbar voltage, a large amount of secondary cable is arranged.And then cost of investment can be reduced, while reducing construction workload.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the multi-loop electric tolerance detection system that the embodiment of the present invention 1 provides.
Specific embodiment
The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention..
Embodiment 1
The embodiment of the present invention 1 provides a kind of multiloop electric measurement detection system, specifically as shown in Figure 1, the system packet
It includes: voltage measuring apparatus V, at least one current measuring device C (n being illustrated as in Fig. 1, C1~Cn) and signal transmission bus
(M and U are illustrated as in Fig. 1).
Signal transmission bus establishes the communication connection between voltage measuring apparatus V and at least one current measuring device C.
Voltage measuring apparatus V after the bus voltage signal of the current period for pre-acquiring is pre-processed, is obtained and is synchronized
Sampling pulse signal；Synchronous Sampling Pulse signal is transmitted to signal transmission bus.
Signal transmission bus, for broadcasting Synchronous Sampling Pulse signal.
Voltage measuring apparatus V is also used to, and after receiving Synchronous Sampling Pulse signal, according to Synchronous Sampling Pulse signal, is generated
Synchronized sampling interrupt signal；According to synchronized sampling interrupt signal, the bus voltage signal of current period is sampled, obtains electricity
Press sampled value；Voltage sample value is broadcasted by signal transmission bus.
Each of at least one current measuring device C current measuring device C is respectively used to, according to Synchronous Sampling Pulse
Signal generates synchronized sampling interrupt signal；According to synchronized sampling interrupt signal, on the same bus of the current period of pre-acquiring
Electric loop electric current corresponding with itself is sampled, and current sampling data is obtained；According to current sampling data and voltage sample value, meter
The electrical quantity of electric loop corresponding with current measuring device is calculated, each of wherein at least one current measuring device electric current is surveyed
Amount device samples the electric current of different electric loops on same bus respectively.
Optionally, system further includes the first signaling interface and second signal interface, and the first signaling interface is current for inputting
The bus voltage signal in period is to voltage measuring apparatus V；Second signal interface for inputting the same bus of current period respectively
The electric current of upper difference electric loop is to each current measuring device C.
Specifically, as shown in Figure 1, the bus voltage signal of power grid is a kind of cyclical signal.Its frequency is exactly power grid frequency
Rate.First signaling interface 5 is exactly the bus voltage signal for receiving current period, is then transmit to voltage measuring apparatus V.And
Before being transmitted to voltage measuring apparatus V, certain processing can also be carried out to power grid bus voltage signal, including signal every
After, level translation and low-pass filtering, the analog signal for meeting A/D input requirements is converted to.And electric loop current signal
For the current signal for a certain electric loop (the inlet wire or outlet) output drawn from the same bus of power grid.By the electric current
Signal is input to corresponding current measuring device C by second signal interface 6.For the bus with subsequent introduced next period
Voltage signal and electric loop current signal etc. are distinguished, it is possible to understand that current described bus voltage signal and electric loop electricity
Flowing signal is the bus voltage signal and electric loop current signal in current period.
Voltage measuring apparatus V can pre-process the bus voltage signal in current period, obtain Synchronous Sampling Pulse
Signal.
It may include: specifically to analyze the bus voltage signal of current period, extract current bus voltage signal
Frequency f.The corresponding score of frequency f is cycle T.After preset fraction will be divided into period, the subcycle of unit number is determined
t.And this t is the period of Synchronous Sampling Pulse signal, it is understood that be the sampling interval.According to Synchronous Sampling Pulse signal
Period, generate periodic Synchronous Sampling Pulse signal.
And after generating periodic synchronous sampling signal, it can be broadcasted by signal transmission bus, to realize voltage
Measuring device V itself shares the synchronous sampling signal with current measuring device C.
Voltage measuring apparatus V and current measuring device C can receive synchronized sampling letter by third signaling interface 2
Number.
Voltage measuring apparatus V is also used to, and according to Synchronous Sampling Pulse signal, generates synchronized sampling interrupt signal.According to same
Sampling interrupt signal is walked, the bus voltage signal of current period is sampled, obtains voltage sample value；Voltage sample value is led to
Signal transmission bus is crossed to be broadcasted.And each of at least one current measuring device C current measuring device C is used respectively
According to Synchronous Sampling Pulse signal, generation synchronized sampling interrupt signal；According to synchronized sampling interrupt signal, to pre-acquiring
Electric loop electric current corresponding with itself is sampled on the same bus of current period, obtains current sampling data；According to electric current
Sampled value and voltage sample value calculate the electrical quantity of electric loop corresponding with current measuring device.
Optionally, voltage measuring apparatus V at least may include: the first signal sampler and the first micro-control unit.
First micro-control unit, for generating synchronized sampling interrupt signal according to Synchronous Sampling Pulse signal.
That is, after Synchronous Sampling Pulse signal is received by the interrupt pin in the first micro-control unit, the first microcontroller list
Member captures the state change for interrupting Synchronous Sampling Pulse signal in input pin, automatically generates interrupt signal.It is actually exactly to pass through
The state of synchronous sampling signal triggers the first micro-control unit and generates synchronized sampling interrupt signal.Concrete trigger condition can be root
It is triggered according to the rising edge of Synchronous Sampling Pulse signal, failing edge, high level or low level etc., concrete trigger condition can basis
Actual conditions setting, does not do excessively repeat here.
First signal sampler, for being carried out to the bus voltage signal of current period according to synchronized sampling interrupt signal
Sampling obtains voltage sample value；Voltage sample value is broadcasted by signal transmission bus.In the present embodiment, the first letter
Number sampler can be A/D sampler.
Similar, current measuring device C is included at least: second signal sampler and the second micro-control unit.
Second micro-control unit, for generating synchronized sampling interrupt signal according to Synchronous Sampling Pulse signal；Second signal
Sampler is used for according to synchronized sampling interrupt signal, to electricity corresponding with itself on the same bus of the current period of pre-acquiring
Air circuit electric current is sampled, and current sampling data is obtained.Second micro-control unit is also used to be adopted according to current sampling data and voltage
Sample value calculates the electrical quantity of electric loop corresponding with current measuring device.Optionally, electrical quantity at least may include voltage sample
Virtual value, current sample virtual value, performance number and watt-hour meter magnitude.Specific calculating process is the prior art, here no longer
Excessively repeat.
Optionally, signal transmission bus includes: the first signal transmission bus and second signal transfer bus.As shown in Figure 1,
First signal transmission bus M and second signal transfer bus U, respectively with voltage measuring apparatus V and at least one current measurement
Device C connection.
Wherein, the first signal transmission bus M passes through third signaling interface 2 and fourth signal interface 1 respectively, with voltage measurement
Device V connection, and connect respectively by third signaling interface 2 with each current measuring device C.Second signal transfer bus U
It is connect by the 5th signaling interface 3 with voltage measuring apparatus V, is connected by the 6th signaling interface 4 and each current measuring device C
It connects.
First signal transmission bus M, for broadcasting Synchronous Sampling Pulse signal；
Second signal transfer bus U, for broadcasting voltage sample value.Signal transmission bus can be universal serial bus
Or parallel bus.
Optionally, voltage measuring apparatus V is also used to, and according to voltage sample value, calculates the busbar voltage period in next period
Value；According to the periodic quantity of the busbar voltage in next period, the period of Synchronous Sampling Pulse signal is adjusted.
Specifically, the frequency of power grid is around power frequency 50Hz (Countries are 60Hz) minor fluctuations, therefore pass through electricity
The numerical value of mains frequency and a variation that pressure signal is analyzed.Therefore, correspondingly, the interval time of synchronized sampling just
It must be adjusted at any time according to grid cycle, just can guarantee a cycle for meeting bus voltage signal always according to default number etc.
The requirement divided.
A kind of multi-loop electric tolerance detection system provided in an embodiment of the present invention, can be to synchronization by signal transmission bus
Sampling pulse signal is shared, and voltage measuring apparatus V and current measuring device C is facilitated to obtain Synchronous Sampling Pulse signal.Electricity
Pressure measuring device V and current measuring device C according to Synchronous Sampling Pulse signal, generates synchronized sampling interrupt signal, then respectively
Respectively according to synchronized sampling interrupt signal to bus voltage signal sampling or to the electric current of electric loops different on same bus
Signal sampling.The synchronization of signal sampling is realized, convenient for the subsequent electrical quantity that can accurately calculate each electric loop.Voltage is surveyed
The voltage signal of acquisition is directly passed through signal transmission bus by amount device V to be shared, and facilitates each current measuring device C can
To obtain simultaneously.By above-mentioned sharing mode, a small amount of secondary cable can be only arranged, measure an electricity under same bus
The electrical quantity of multiple electrical separations or multiple inlet-outlet line electric loops on gas holder or control cabinet.Without being in each measurement
Between system or the voltage terminal and busbar voltage of multifunction instrument, a large amount of secondary cable is arranged.And then can reduce investment at
This, while reducing construction workload.
Although above having used general explanation and specific embodiment, the present invention is described in detail, at this
On the basis of invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore,
These modifications or improvements without departing from theon the basis of the spirit of the present invention are fallen within the scope of the claimed invention.
Claims (8)
1. a kind of multi-loop electric tolerance detection system, which is characterized in that the system comprises: voltage measuring apparatus, at least one
Current measuring device and signal transmission bus；
The signal transmission bus establishes the communication between the voltage measuring apparatus and at least one described current measuring device
Connection；
The voltage measuring apparatus after the bus voltage signal for the current period to pre-acquiring pre-processes, obtains same
Walk sampling pulse signal；The Synchronous Sampling Pulse signal is transmitted to the signal transmission bus；
The signal transmission bus, for broadcasting the Synchronous Sampling Pulse signal；
The voltage measuring apparatus is also used to, and after receiving the Synchronous Sampling Pulse signal, is believed according to the Synchronous Sampling Pulse
Number, generate synchronized sampling interrupt signal；According to the synchronized sampling interrupt signal, to the bus voltage signal of the current period
It is sampled, obtains voltage sample value；The voltage sample value is broadcasted by the signal transmission bus；
Each of at least one current measuring device current measuring device is respectively used to, according to the synchronized sampling arteries and veins
Signal is rushed, synchronized sampling interrupt signal is generated；According to the synchronized sampling interrupt signal, to the same of the current period of pre-acquiring
Electric loop electric current corresponding with itself is sampled on bus, obtains current sampling data；According to the current sampling data and institute
Voltage sample value is stated, the electrical quantity of electric loop corresponding with the current measuring device, at least one described current measurement are calculated
Each of device current measuring device samples the electric current of different electric loops on the same bus respectively.
2. system according to claim 1, which is characterized in that the system also includes the first signaling interface and second signals
Interface, first signaling interface are used to input the bus voltage signal of current period to the voltage measuring apparatus；Described
Binary signal interface for inputting the bus current of current period to each current measuring device respectively.
3. system according to claim 1, which is characterized in that voltage measuring apparatus is specifically used for, to the current period
Bus voltage signal analyzed, obtain the period of the bus voltage signal of current period；
After the period of the bus voltage signal of the current period is divided into default number, the subcycle of unit number is determined；
Using the subcycle of the unit number as the period of the Synchronous Sampling Pulse signal；
According to the period of the Synchronous Sampling Pulse signal, periodic Synchronous Sampling Pulse signal is generated.
4. system according to claim 1, which is characterized in that the voltage measuring apparatus includes at least the first signal sampling
Device and the first micro-control unit；
First micro-control unit, for generating synchronized sampling interrupt signal according to the Synchronous Sampling Pulse signal；
First signal sampler is used for according to the synchronized sampling interrupt signal, to the busbar voltage of the current period
Signal is sampled, and voltage sample value is obtained；The voltage sample value is broadcasted by the signal transmission bus.
5. system according to claim 1, which is characterized in that the current measuring device includes at least: second signal is adopted
Sample device and the second micro-control unit；
Second micro-control unit, for generating synchronized sampling interrupt signal according to the Synchronous Sampling Pulse signal；
The second signal sampler, for according to the synchronized sampling interrupt signal, to the same of the current period of pre-acquiring
Electric loop electric current corresponding with itself is sampled on bus, obtains current sampling data；
Second micro-control unit is also used to be calculated and the electricity according to the current sampling data and the voltage sample value
Flow measuring apparatus corresponds to the electrical quantity of electric loop.
6. system according to claim 1-5, which is characterized in that the signal transmission bus includes: the first letter
Number transfer bus and second signal transfer bus；
First signal transmission bus and the second signal transfer bus, respectively with the voltage measuring apparatus and described
The connection of at least one current measuring device；
First signal transmission bus, for broadcasting the Synchronous Sampling Pulse signal；
The second signal transfer bus, for broadcasting the voltage sample value.
7. system according to claim 1-5, which is characterized in that the electrical quantity of electric loop includes at least: electricity
Pressure sampling virtual value, current sample virtual value, performance number and watt-hour meter magnitude.
8. system according to claim 1-5, which is characterized in that voltage measuring apparatus is also used to, according to described
Voltage sample value calculates the busbar voltage periodic quantity in next period；
And the periodic quantity of the busbar voltage according to next period, the period of the Synchronous Sampling Pulse signal is adjusted
It is whole.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811174154.7A CN109116098A (en) | 2018-10-09 | 2018-10-09 | A kind of multi-loop electric tolerance detection system |
| CN201920563139.5U CN209894878U (en) | 2018-10-09 | 2019-04-23 | Multiloop electric quantity detecting system |
| CN201910330452.9A CN109856451A (en) | 2018-10-09 | 2019-04-23 | A kind of multi-loop electric tolerance detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811174154.7A CN109116098A (en) | 2018-10-09 | 2018-10-09 | A kind of multi-loop electric tolerance detection system |
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| Publication Number | Publication Date |
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| CN109116098A true CN109116098A (en) | 2019-01-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811174154.7A Withdrawn CN109116098A (en) | 2018-10-09 | 2018-10-09 | A kind of multi-loop electric tolerance detection system |
| CN201920563139.5U Active CN209894878U (en) | 2018-10-09 | 2019-04-23 | Multiloop electric quantity detecting system |
| CN201910330452.9A Pending CN109856451A (en) | 2018-10-09 | 2019-04-23 | A kind of multi-loop electric tolerance detection system |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920563139.5U Active CN209894878U (en) | 2018-10-09 | 2019-04-23 | Multiloop electric quantity detecting system |
| CN201910330452.9A Pending CN109856451A (en) | 2018-10-09 | 2019-04-23 | A kind of multi-loop electric tolerance detection system |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109116098A (en) * | 2018-10-09 | 2019-01-01 | 上海方融自动化设备有限公司 | A kind of multi-loop electric tolerance detection system |
| CN111308175A (en) * | 2020-03-16 | 2020-06-19 | 国网上海市电力公司 | Multi-loop synchronous measurement ammeter and measurement method thereof |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2735359B2 (en) * | 1990-05-08 | 1998-04-02 | 株式会社東芝 | Sampling synchronizer |
| CN102095938B (en) * | 2010-03-08 | 2012-11-21 | 北京信息科技大学 | High-precision signal processing method for insulation online monitoring of high-voltage electric-power capacitive equipment |
| CN102623966B (en) * | 2012-04-01 | 2015-01-07 | 许继电气股份有限公司 | Differential protection method for bus |
| CN103969500B (en) * | 2014-04-11 | 2017-09-12 | 深圳市中电电力技术股份有限公司 | Intelligent grid analog acquisition device, method and system |
| CN104730343A (en) * | 2015-03-18 | 2015-06-24 | 中电科技电子信息系统有限公司 | High voltage electricity capacitive equipment dielectric loss on-line monitoring method and monitoring system |
| CN104898606A (en) * | 2015-04-10 | 2015-09-09 | 航天科工深圳（集团）有限公司 | Intelligent ring main unit and monitoring unit system and monitoring method thereof |
| CN105988050B (en) * | 2015-06-11 | 2019-02-01 | 国网湖北省电力有限公司荆门供电公司 | Combining unit verification of synchronization method and device based on the output of electric current locking phase |
| CN205880052U (en) * | 2016-07-20 | 2017-01-11 | 武汉市豪迈电力自动化技术有限责任公司 | Distributing type synchronous sampling measurement system |
| CN108535551B (en) * | 2018-05-11 | 2019-09-20 | 华中科技大学 | A kind of dielectric loss method for synchronously measuring based on wireless telecommunications |
| CN109116098A (en) * | 2018-10-09 | 2019-01-01 | 上海方融自动化设备有限公司 | A kind of multi-loop electric tolerance detection system |
-
2018
- 2018-10-09 CN CN201811174154.7A patent/CN109116098A/en not_active Withdrawn
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2019
- 2019-04-23 CN CN201920563139.5U patent/CN209894878U/en active Active
- 2019-04-23 CN CN201910330452.9A patent/CN109856451A/en active Pending
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| CN109856451A (en) | 2019-06-07 |
| CN209894878U (en) | 2020-01-03 |
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Application publication date: 20190101 |