CN107797052A - String supplementary set Chinese style acquisition system protection act delay measurement system and method - Google Patents
String supplementary set Chinese style acquisition system protection act delay measurement system and method Download PDFInfo
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- CN107797052A CN107797052A CN201610798506.0A CN201610798506A CN107797052A CN 107797052 A CN107797052 A CN 107797052A CN 201610798506 A CN201610798506 A CN 201610798506A CN 107797052 A CN107797052 A CN 107797052A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
- G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
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- General Physics & Mathematics (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The present invention disclose it is a kind of go here and there supplementary set Chinese style acquisition system protection act delay measurement system and method, system includes signal generation apparatus, remote signaling acquisition module, combining unit, protection device, waveform recording device and signal processing unit, is the step of method：Signal generation apparatus applies analog quantity to remote signaling acquisition module, and the analog quantity accesses waveform recording device simultaneously；Analog signalses are converted to data signal by remote signaling acquisition module, are transferred to combining unit；Data signal is transmitted to protection device by combining unit, and protection device judges whether to break down, and protection signal is sent after reaching action definite value, closes output relay, the action signal access waveform recording device of relay；Signal processing unit calculates the signal of signal generation apparatus output and the phase difference of the action signal of relay, obtains protection act delay.This technical scheme can accurate measurement string supplementary set Chinese style acquisition system protection act delay, for protect definite value selection foundation is provided.
Description
Technical field
It is special the invention belongs to flexible AC transmission FACTS (Flexible AC Transmission Systems) field
It is not related to a kind of string supplementary set Chinese style acquisition system protection act delay measurement system and method.
Background technology
Because tandem type flexible AC transmission equipment is typically used in series in circuit, therefore when line failure, series connection
Very big overvoltage will be born on type flexible AC transmission equipment, therefore typically all configures various overvoltage protective devices, and is matched somebody with somebody
Various defencive functions are put, tandem type flexible AC transmission equipment is very high for the rapidity requirement of protection act, general to require
Action message in 100us.Measurement current transform er on single-phase insulated platform is up to 8, divider 1, due to insulated platform
Insulating requirements over the ground, all analog quantitys (magnitude of current and voltage) to be measured, which need to be converted to digital quantity, is sent to ground, if often
Individual one photo-translating system of CT configuration, then the cost of single-phase sampling system will rise.If by all Current Mutual Inductances
Device secondary cable, which is connected at same photoelectric conversion device, carries out unified conversion, referred to as centralized acquisition mode, substantially reduces and makes
Valency.
The composition of string supplementary set Chinese style acquisition system is shown in Fig. 1, mainly includes distal end acquisition module, combining unit, protection device 3
Most of, the bang path of signal in systems is shown in Fig. 2.
The delay of acquisition system mainly has following source, the string being arranged on insulated platform of acquisition system centralized first
One end of connection type flexible AC transmission equipment is connected with insulated platform, and all devices and ground are without electrical link on insulated platform.
Therefore the analog quantity of its measuring apparatus must be converted into digital quantity optical signal transmission to the control protective unit on ground.But consider
The limitation of centralized acquisition system power supply mode, it is desirable to which the power consumption of equipment of the centralized acquisition system on high-voltage isulation platform will
It is low.But the sampling of centralization is sent to combining unit due to carrying out coding to multi-analog sampled data, in combining unit side
Need to reduce coded data, obtain the sampled value of every road analog quantity.The traffic rate of optical fiber is limited, and the data conversion of multichannel must
Extra delay is so introduced, the delay of centralized acquisition system is bigger than the de-centralized acquisition system of routine.Need a kind of survey
The protection act delay of amount method accurate measurement string supplementary set Chinese style acquisition system.
The high/ultrahigh voltage transmission system platform data acquisition system of the designs of ZL0323627.9 and 200620012632.0
System does not provide the delay data of measurement protection system, the problems such as whole-sample delay is big or indefinite be present, and
The 200410032354.0 Time delay measurement methods provided are used for the communications field, are not used to measure centralization sampling protection system
Delay.
The content of the invention
The purpose of the present invention, it is to provide a kind of string supplementary set Chinese style acquisition system protection act delay measurement system and side
Method, its can accurate measurement string supplementary set Chinese style acquisition system protection act delay, for protect definite value selection foundation is provided.
In order to reach above-mentioned purpose, solution of the invention is：
One kind string supplementary set Chinese style acquisition system protection act delay measurement system, including signal generation apparatus, remote signaling
Acquisition module, combining unit, protection device, waveform recording device and signal processing unit, wherein, signal generation apparatus is to defeated
Go out analog signalses, the analog signalses access to the waveform recording device；The analog signalses are also through remote signaling
Acquisition module is changed into data signal, accesses the combining unit, and the protection device is accessed to after combining unit；It is described
The output end connection waveform recording device of protection device, and the output end of waveform recording device connection signal processing unit.
Above-mentioned signal generation apparatus uses reaying protection test instrument.
Connected between said distal ends signal acquisition module and combining unit with optical fiber.
Above-mentioned waveform recording device uses multichannel oscillograph.
One kind string supplementary set Chinese style acquisition system protection act Time delay measurement method, comprises the following steps：
Step 1, signal generation apparatus applies analog quantity, the simulation to the analog input port of remote signaling acquisition module
Amount accesses waveform recording device simultaneously；
Step 2, analog signalses are converted to data signal by remote signaling acquisition module, are transferred to combining unit；
Step 3, the data signal that remote signaling acquisition module transmits is transmitted to protection device, protection device by combining unit
Judge whether to break down, protection signal is sent after reaching action definite value, and close output relay, the action of relay
Signal accesses waveform recording device；
Step 4, signal processing unit calculates the phase of the signal of signal generation apparatus output and the action signal of relay
Difference, obtain protection act delay.
In above-mentioned steps 1, signal generation apparatus output step signal, output analog quantity is within a sampling period from zero
Rise to more than protection device action definite value.
The particular content of above-mentioned steps 4 is：Signal processing unit input signal step moment on wave recording is used as ginseng
According to point, for witness mark to the time difference at actuating of relay waveform change moment, the time difference is centralized sampling system
Sampling time delay.
In above-mentioned steps 2, the data signal of remote signaling acquisition module output is transferred to combining unit by optical fiber.
In above-mentioned steps 3, the action signal of relay accesses waveform recording device after stabilization is handled.
After such scheme, the waveform of the invention by comparing input analog amount signal and protective relay action signal
The accurate delay for obtaining system, for the actuation time of accurate evaluation protection system, application is direct current step signal, is avoided
In regular alternating current protection, the protection act that the computational methods difference of actuation time virtual value is brought is delayed the problem of inconsistent.
Brief description of the drawings
Fig. 1 is the integrated stand composition of existing string supplementary set Chinese style acquisition system；
Fig. 2 is the delay pie graph of string supplementary set Chinese style acquisition system；
Fig. 3 is the integrated stand composition of measuring system of the present invention；
Fig. 4 is the fundamental diagram of measuring system of the present invention；
Fig. 5 is the flow chart of measuring method of the present invention.
Embodiment
Below with reference to accompanying drawing, technical scheme is described in detail.
As shown in figure 3, the present invention provides a kind of string supplementary set Chinese style acquisition system protection act delay measurement system, to survey
The delay of amount string supplementary set Chinese style acquisition system, the measuring system include signal generation apparatus, remote signaling acquisition module, merged
Unit, protection device, waveform recording device and signal processing unit, wherein, signal generation apparatus to export analog signalses,
The analog signalses access to the waveform recording device；The analog signalses are also changed into through remote signaling acquisition module
Data signal, accesses the combining unit, and the protection device is accessed to after combining unit.
Coordinate shown in Fig. 4, in the present embodiment, signal generation apparatus is reaying protection test instrument, it is, of course, also possible to from
Other signal source output devices.Signal generation apparatus exports step signal, and output analog quantity rises within a sampling period
To more than protection device action definite value.
Remote signaling acquisition module is located at high voltage platform, and the analog signalses the signal generation apparatus is exported turn
It is changed to data signal.
The output of signal generation apparatus accesses waveform recording device simultaneously.
The combining unit receives data signal and is transmitted to the protection device.The remote signaling acquisition module is with closing
And connected between unit with optical fiber, the data signal of transmission passes through Manchester's code, and numeral letter is transmitted using 60044-8 agreements
Number.
The protection device receives the data signal of combining unit forwarding, obtains sampling code value after decoding, is multiplied by corresponding
The original value of sampling is obtained after downsampling factor.Protection module built in the protection device, some protection definite values are set, when detecting
Continuous 3 sampled values all meet to judge protection act during protection act condition, issue protection act instruction, control exit relay
Action.
The exit relay contact access waveform recording device of the protection device.
The waveform recording device is multichannel oscillograph or other waveform recording devices.
Signal processing unit is to the delay data according to the shape information of recording device records acquisition combining unit, this reality
Apply in example, the method for its acquisition delay data is：The input signal step moment is as reference point, measurement reference on wave recording
For point to the time difference at actuating of relay waveform change moment, the time difference is the sampling time delay of centralized sampling system.Signal
Processing unit can be the waveform analysis function that waveform analysis software or oscillograph carry.
Based on above measuring system, as shown in figure 5, the present invention also provides a kind of string supplementary set Chinese style acquisition system protection act
Time delay measurement method, comprises the following steps：
Step 1, signal generation apparatus applies the analog quantity (magnitude of current to the analog input port of remote signaling acquisition module
Or voltage), the analog quantity accesses waveform recording device simultaneously；Wherein, signal generation apparatus output is step signal, output
Analog quantity is raised to more than protection device action definite value within a sampling period (such as 50us) from above freezing；
Step 2, analog signalses are converted to data signal by remote signaling acquisition module, and it is single to be transferred to merging by optical fiber
Member；
Step 3, the sampled data that remote signaling acquisition module transmits is transmitted to protection device, protection device by combining unit
Judge whether to break down by protection algorism, send protection signal after reaching action definite value, and drive and output relay
Action, output relay is closed, after stabilization is handled, the action signal of relay connects the action signal of the amount of outputing output contact
Enter waveform recording device；
Step 4, signal processing unit calculates the step signal of signal generation apparatus output and the action signal of relay
Phase difference, obtain protection act delay.
The technological thought of above example only to illustrate the invention, it is impossible to protection scope of the present invention is limited with this, it is every
According to technological thought proposed by the present invention, any change done on the basis of technical scheme, the scope of the present invention is each fallen within
Within.
Claims (9)
1. one kind string supplementary set Chinese style acquisition system protection act delay measurement system, it is characterised in that：Including signal generation apparatus,
Remote signaling acquisition module, combining unit, protection device, waveform recording device and signal processing unit, wherein, signal fills
Put to export analog signalses, the analog signalses access to the waveform recording device；The analog signalses also pass through
Remote signaling acquisition module is changed into data signal, accesses the combining unit, and the protection is accessed to after combining unit
Device；The output end connection waveform recording device of the protection device, and the output end of waveform recording device connection signal transacting
Unit.
2. string supplementary set Chinese style acquisition system protection act delay measurement system as claimed in claim 1, it is characterised in that：It is described
Signal generation apparatus uses reaying protection test instrument.
3. string supplementary set Chinese style acquisition system protection act delay measurement system as claimed in claim 1, it is characterised in that：It is described
Connected between remote signaling acquisition module and combining unit with optical fiber.
4. string supplementary set Chinese style acquisition system protection act delay measurement system as claimed in claim 1, it is characterised in that：It is described
Waveform recording device uses multichannel oscillograph.
5. one kind string supplementary set Chinese style acquisition system protection act Time delay measurement method, it is characterised in that comprise the following steps：
Step 1, signal generation apparatus applies analog quantity to the analog input port of remote signaling acquisition module, and the analog quantity is same
When access waveform recording device；
Step 2, analog signalses are converted to data signal by remote signaling acquisition module, are transferred to combining unit；
Step 3, the data signal that remote signaling acquisition module transmits is transmitted to protection device by combining unit, and protection device judges
Whether break down, protection signal is sent after reaching action definite value, and close output relay, the action signal of relay
Access waveform recording device；
Step 4, signal processing unit calculates the signal of signal generation apparatus output and the phase difference of the action signal of relay, obtains
It is delayed to protection act.
6. string supplementary set Chinese style acquisition system protection act Time delay measurement method as claimed in claim 5, it is characterised in that：It is described
In step 1, signal generation apparatus output step signal, output analog quantity is raised to protection dress within a sampling period from above freezing
Put more than action definite value.
7. string supplementary set Chinese style acquisition system protection act Time delay measurement method as claimed in claim 6, it is characterised in that：It is described
The particular content of step 4 is：Signal processing unit input signal step moment on wave recording refers to as reference point, measurement
For point to the time difference at actuating of relay waveform change moment, the time difference is the sampling time delay of centralized sampling system.
8. string supplementary set Chinese style acquisition system protection act Time delay measurement method as claimed in claim 5, it is characterised in that：It is described
In step 2, the data signal of remote signaling acquisition module output is transferred to combining unit by optical fiber.
9. string supplementary set Chinese style acquisition system protection act Time delay measurement method as claimed in claim 5, it is characterised in that：It is described
In step 3, the action signal of relay accesses waveform recording device after stabilization is handled.
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| CN201610798506.0A CN107797052A (en) | 2016-08-31 | 2016-08-31 | String supplementary set Chinese style acquisition system protection act delay measurement system and method |
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| CN201610798506.0A CN107797052A (en) | 2016-08-31 | 2016-08-31 | String supplementary set Chinese style acquisition system protection act delay measurement system and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111239666A (en) * | 2020-02-07 | 2020-06-05 | 云南电网有限责任公司电力科学研究院 | Transient characteristic test system of far-end module box |
| CN111934760A (en) * | 2020-08-14 | 2020-11-13 | 南方电网科学研究院有限责任公司 | Signal processing transmission delay characteristic detection device and method and terminal equipment |
| CN113702894A (en) * | 2021-09-23 | 2021-11-26 | 云南电网有限责任公司电力科学研究院 | Fault diagnosis method and device for remote module and merging unit |
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