CN103630866B - Transient characterisitics detection system and the method for electronic type voltage transformer - Google Patents

Transient characterisitics detection system and the method for electronic type voltage transformer Download PDF

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Publication number
CN103630866B
CN103630866B CN201310407411.8A CN201310407411A CN103630866B CN 103630866 B CN103630866 B CN 103630866B CN 201310407411 A CN201310407411 A CN 201310407411A CN 103630866 B CN103630866 B CN 103630866B
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China
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voltage
electronic type
primary
transient
voltage transformer
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CN201310407411.8A
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Chinese (zh)
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CN103630866A (en
Inventor
孙健
崔恒志
王忠东
汤汉松
袁宇波
袁晓冬
罗强
卜强生
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国家电网公司
江苏省电力公司
江苏省电力公司电力科学研究院
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Abstract

The invention discloses a kind of transient characterisitics detection system and method for electronic type voltage transformer, system comprises relay protection condition simulation unit, high frequency divider, merge cells and transient characterisitics detecting unit, the primary side high voltage U of relay protection condition simulation unit output1, a upside high voltage U1Also be converted into the standard source signal U of transient characterisitics detecting unit by high frequency divider2, tested electronic type voltage transformer and high frequency divider are in parallel, and the sampled value of tested electronic type voltage transformer sends to transient characterisitics detecting unit by the optical fiber interface of merge cells, as the measured signal of transient characterisitics detecting unit. Transient characterisitics detection system and the method for electronic type voltage transformer of the present invention, the transient characterisitics to electronic type voltage transformer that can be reliably perfect detect, be intended to improve the transient performance of electronic type voltage transformer, for the safe and stable operation of electronic type voltage transformer provides technical guarantee.

Description

Transient characterisitics detection system and the method for electronic type voltage transformer
Technical field
The present invention relates to intelligent grid detection technique field, be specifically related to a kind of transient characterisitics detection system and method for electronic type voltage transformer.
Background technology
Along with the fast development of intelligent grid; electronic type voltage transformer (EVT) is widely applied in intelligent grid; undertaking the metering to secondary side by the progress of disease quickly and accurately of power system primary side voltage; measure; protection; the IED equipment such as failure wave-recording, the quality of its performance directly affects the operation of IED equipment.
In the time of power grid operation, the frequency of the primary voltage amplitude of electronic type voltage transformer all approaches nominal parameter value, but when overvoltage appears in electrical network, or atmospheric discharge, or switching manipulation, or short trouble, or when the situation such as circuit re-switching, the voltage of network system all there will be transient process, in this process, require the electronic type voltage transformer can be to be no more than the accurate progress of disease primary voltage of error limit within the Millisecond time, this is for the IED equipment of secondary side, most important.
The transient condition of electronic type voltage transformer is divided into two classes, one class is primary side short circuit, after power supply short circuit between HV Terminal and ground connection low-voltage terminal, the secondary output voltage of electronic type voltage transformer should drop to below 10% of short circuit previous peaks in the cycle of 1 of rated frequency, another kind of is the reclosing that circuit band is detained electric charge, quantity of electric charge when line switching disconnects depends on the phase place of voltage while disconnection, the worst situation is to disconnect in voltage peak moment, secondary output voltage u (t0) is at this moment variant for the voltage transformer of different principle, in the time of circuit re-switching, u (t0) will be superimposed upon in sinusoidal signal, can cause transient error, if line disconnection in the time of primary side voltage peak, again in the time of voltage peak and symbol overlap with being detained when opposite charge, require after coincidence in 2 to 3 cycles instantaneous voltage error be no more than 10%, in 3 to 4.5 cycles, instantaneous voltage error is no more than 5%.
But, because electronic type voltage transformer is output as digital interface, traditional test macro cannot access digital quantity, thereby seriously lag behind while causing the transient test of electronic type voltage transformer, at present both at home and abroad, also not carrying out special method of testing and system for the transient characterisitics of EVT, is current urgent problem, to ensure the long-term safety stable operation of electronic type voltage transformer.
Summary of the invention
Technical problem solved by the invention is to overcome test macro traditional in prior art cannot access digital quantity, thereby seriously lag behind while causing the transient test of electronic type voltage transformer, at present both at home and abroad, also do not carry out special method of testing and system for the transient characterisitics of EVT, transient characterisitics detection system and the method for electronic type voltage transformer provided by the invention, the transient characterisitics to electronic type voltage transformer that can be reliably perfect detect, be intended to improve the transient performance of electronic type voltage transformer, improve the measuring technology of electronic type voltage transformer, for the safe and stable operation of electronic type voltage transformer provides technical guarantee.
In order to achieve the above object, the technical solution adopted in the present invention is:
A transient characterisitics detection system for electronic type voltage transformer, is characterized in that: comprise relay protection condition simulation unit, high frequency divider, merge cells and transient characterisitics detecting unit, the primary side high voltage U of described relay protection condition simulation unit output1Provide test different electric pressures used to tested electronic type voltage transformer, primary side high voltage U1Also be converted into low-voltage by high frequency divider, as the standard source signal U of transient characterisitics detecting unit2Tested electronic type voltage transformer and high frequency divider are in parallel, and be together in parallel with relay protection condition simulation unit, the sampled value of tested electronic type voltage transformer sends to transient characterisitics detecting unit by the optical fiber interface of merge cells, as the measured signal of transient characterisitics detecting unit.
The transient characterisitics detection system of aforesaid electronic type voltage transformer, is characterized in that: described relay protection condition simulation unit comprises the primary side high voltage U of output1Power supply, the first switch CB1 and second switch CB2, described the first switch CB1 is connected in parallel on the two ends of power supply, connect with the positive pole of power supply in one end of described second switch CB2, the other end is the primary side high voltage U of relay protection condition simulation unit1Output, wherein resistance R g is current-limiting resistance.
The transient characterisitics detection system of aforesaid electronic type voltage transformer, is characterized in that: described transient characterisitics detecting unit comprises
Be positioned on high-tension side front-collection unit, for sampling and processing standard source signal, and send rearmounted processing unit to;
Be positioned at the rearmounted processing unit of low-pressure side, for receiving the standard source signal of measured signal and the collection of front-collection unit, and catch the Sudden Changing Rate of relay protection, carry out data record ripple and error and calculate;
Between described front-collection unit and rearmounted processing unit by fiber optic communication, described rearmounted processing unit also by optical fiber be positioned on high-tension side merge cells and communicate, all adopt IEC61850 ?9 ?1, IEC61850 ?9 ?2 or FT3 communication protocol.
The transient characterisitics detection system of aforesaid electronic type voltage transformer, it is characterized in that: described front-collection unit comprises dsp processor, electric pressure converter, signal conditioning circuit, ADC Acquisition Circuit, battery pack, optical transmitter and optical receiver described standard source signal U2Be connected with signal conditioning circuit by electric pressure converter, described signal conditioning circuit is also connected with dsp processor by ADC Acquisition Circuit, described dsp processor sends to rearmounted processing unit by optical transmitter by the standard source signal data of collection, described dsp processor receives by optical receiver the clock sync signal that rearmounted processing unit sends, and send clock sync signal to ADC Acquisition Circuit, control collection period, described battery pack is used for improving operating voltage.
The transient characterisitics detection system of aforesaid electronic type voltage transformer, is characterized in that: described signal conditioning circuit is provided with cut-off frequency and is not less than the low-pass filter circuit of 20kHz; The AD chip of described ADC Acquisition Circuit is 24 high-speed sampling chips.
The transient characterisitics detection system of aforesaid electronic type voltage transformer, it is characterized in that: described rearmounted processing unit comprises the first fiber optical transceiver, the second fiber optical transceiver, FPGA, clock module and PowerPC primary processor, the standard source signal sampling value that described the first fiber optical transceiver sends for receiving front-collection unit, and send FPGA to; The measured signal sampled value that described the second fiber optical transceiver sends for receiving merge cells, and send FPGA to; Described clock module carries out synchronized sampling for control criterion source signal and measured signal, be connected with FPGA, described FPGA receives for offset data the additive error that link is brought in time domain, and by the data after time domain compensation, send PowerPC primary processor to, carry out data record ripple and error and calculate.
The transient characterisitics detection system of aforesaid electronic type voltage transformer, it is characterized in that: described rearmounted processing unit also comprises man-machine interface, described man-machine interface is connected with PowerPC primary processor, described man-machine interface comprises high-resolution color LCD display, shows for the graphical drafting, the error parameter that complete data.
The detection method of the transient characterisitics detection system of the electronic type voltage transformer based on above-mentioned, is characterized in that: comprises the following steps,
Step (1), according to formula (1), determines primary side high voltage U1The output voltage U of power supply1
Wherein, UpFor primary side high voltage U1The virtual value of fundametal compoment, f is fundamental frequency,For starting phase angle, UdcFor DC component, Ures(t) be residual voltage component.
Step (2), by controlling relay protection condition simulation unit, controls tested electronic type voltage transformer and enters the relay protection of primary side short circuit or the relay protection of circuit band delay electric charge reclosing;
The specified phase deviation of step (3) to measured signalWith specified delay time tdRevised, each sampled value of measured signal is carried out to time calibrating, and markers correctionWherein frFor the rated frequency value of tested electronic type voltage transformer, thereby make revised measured signal sampled value synchronize and process by markers with standard source signal sampling value;
Step (4) catches mutation voltage Δ u by transient detection, and mutation voltage Δ u is formula (2),
Δu=|u(t)-u(t-2T)|(2)
Wherein, t is current time, and T is a power frequency cycle time, and u (t) is current instantaneous voltage;
Step (5), as Δ u > when Uset, Uset is threshold voltage, Uset=0.4Up, be judged to be transient state initial;
Step (6) is if the relay protection of primary side short circuit is searched for the magnitude of voltage U of the previous cycle measured signal of transient state initial timetestPeak value Umax, and to instantaneous voltage and 0.1U after transient state initial time one cyclemaxCarry out amplitude judgement, whether qualified to judge the transient characterisitics of primary side short circuit, if the instantaneous voltage after transient state initial time one cycle is greater than 0.1Umax, the transient characterisitics of primary side short circuit are qualified.
Step (7) is if circuit band is detained the relay protection of electric charge reclosing, two cycles from transient state initial time start, whether the instantaneous voltage error ε calculating in two to three cycle time windows is greater than 10%, whether the instantaneous voltage error ε in three to four half cycles time windows is greater than 5%, whether qualified to judge the transient characterisitics of circuit band delay electric charge reclosing, if the instantaneous voltage error ε in two to three cycle time windows is greater than 10%, instantaneous voltage error ε in three to four half cycles time windows is greater than 5%, and the transient characterisitics that circuit band is detained electric charge reclosing are qualified.
The transient characterisitics detection system of aforesaid electronic type voltage transformer, it is characterized in that: step (2), by controlling relay protection condition simulation unit, controlling tested electronic type voltage transformer, to enter the method that the relay protection of primary side short circuit or circuit band be detained the relay protection of electric charge reclosing be closed second switch CB2, control the first switch CB1 by being disconnected to closure, making the voltage of tested electronic type voltage transformer primary side reduce to zero, is the relay protection of primary side short circuit; Disconnect the first switch CB1, control second switch CB2 at primary side high voltage U1Positive peak place by being closed into disconnection, at primary side high voltage U1Negative peak place by being disconnected to closure, be the relay protection that circuit band is detained electric charge reclosing.
The transient characterisitics detection system of aforesaid electronic type voltage transformer, is characterized in that: the method for calculating instantaneous voltage error ε is,
(1) error voltage Ue=Utest-Uref, wherein UtestFor the magnitude of voltage of measured signal, UrefFor the magnitude of voltage of standard source signal;
(2) by formula (3), obtain instantaneous voltage error ε, formula (3) is as follows,
ϵ = U e * 100 / 2 U p - - - ( 3 )
Wherein, UpFor primary side high voltage U1The virtual value of fundametal compoment.
The invention has the beneficial effects as follows: the transient characterisitics detection system of electronic type voltage transformer of the present invention, the transient characterisitics to electronic type voltage transformer that can be reliably perfect detect, be intended to improve the transient performance of electronic type voltage transformer, improve the measuring technology of electronic type voltage transformer, for the safe and stable operation of electronic type voltage transformer provides technical guarantee, and have the following advantages
1) detection system can be compatible without principle, different manufacturers, and the electronic type voltage transformer of different agreement interface, has very high versatility;
2) can test two kinds of relay protections that primary side short circuit and circuit band are detained electric charge reclosing, transient state examination is strict;
3) test macro does not rely on the current synchronous regime of electronic type voltage transformer, and specified phase deviation, the specified delay time of energy adaptive electro minor voltage transformer, realizes synchronous;
4) the digital quantity reception by the sampling of high accuracy high bandwidth analog quantity, and based on FPGA, has completed source data collection, catch and filtering algorithm by perfect Sudden Changing Rate, completed the calculating of error, ensured the high accuracy of detection system, measure error is no more than 1%;
5) transient characterisitics detecting unit is high and low pressure side separate type, has reduced interference and error that the long-distance transmissions of analog signal is brought, the security that has greatly improved again detection system.
Brief description of the drawings
Fig. 1 is the system block diagram of the transient characterisitics detection system of electronic type voltage transformer of the present invention.
Detailed description of the invention
Below in conjunction with Figure of description, the present invention is further illustrated.
As shown in Figure 1, a kind of transient characterisitics detection system of electronic type voltage transformer, comprises relay protection condition simulation unit, high frequency divider, merge cells and transient characterisitics detecting unit, the primary side high voltage U of relay protection condition simulation unit output1Provide test different electric pressures used to tested electronic type voltage transformer, primary side high voltage U1Also be converted into low-voltage by high frequency divider, as the standard source signal U of transient characterisitics detecting unit2High frequency divider has high bandwidth and high-precision characteristic, can ensure the high-fidelity progress of disease to transient voltage, be in parallel by tested electronic type voltage transformer and high frequency divider, and be together in parallel with relay protection condition simulation unit, the sampled value of tested electronic type voltage transformer sends to transient characterisitics detecting unit by the optical fiber interface of merge cells, as the measured signal of transient characterisitics detecting unit.
Described relay protection condition simulation unit comprises the primary side high voltage U of output1Power supply, the first switch CB1 and second switch CB2, described the first switch CB1 is connected in parallel on the two ends of power supply, connect with the positive pole of power supply in one end of described second switch CB2, the other end is the primary side high voltage U of relay protection condition simulation unit1Output.
Described transient characterisitics detecting unit comprises and is positioned on high-tension side front-collection unit, for sampling and processing standard source signal, and sends rearmounted processing unit to; Be positioned at the rearmounted processing unit of low-pressure side, for receiving the standard source signal of measured signal and the collection of front-collection unit, and catch the Sudden Changing Rate of relay protection, carry out data record ripple and error and calculate;
Between described front-collection unit and rearmounted processing unit by fiber optic communication, described rearmounted processing unit also by optical fiber be positioned on high-tension side merge cells and communicate, all adopt IEC61850 ?9 ?1, IEC61850 ?9 ?2 or FT3 communication protocol.
Described front-collection unit comprises dsp processor, electric pressure converter, signal conditioning circuit, ADC Acquisition Circuit, battery pack, optical transmitter and optical receiver, described standard source signal U2Be connected with signal conditioning circuit by electric pressure converter, electric pressure converter is by standard source signal U2Output can be for the peak value 10V gathering with interior voltage U3Described signal conditioning circuit is also connected with dsp processor by ADC Acquisition Circuit, described dsp processor sends to rearmounted processing unit by optical transmitter by the standard source signal data of collection, described dsp processor receives by optical receiver the clock sync signal that rearmounted processing unit sends, and send clock sync signal to ADC Acquisition Circuit, control collection period, described battery pack is used for improving operating voltage, and described signal conditioning circuit is provided with cut-off frequency and is not less than the low-pass filter circuit of 20kHz, the AD chip of described ADC Acquisition Circuit is 24 high-speed sampling chips, select 24 analog-digital converter AD7765 chips of ADI company, sample rate is decided to be 78kHz, now dynamic range is up to being 115dB, this turns AD chip and has outstanding DC characteristic, be highly suitable in the situation that simultaneously needs DC data AC signal is carried out to high-speed data acquisition, the built-in FIR wave filter of full range, can on nyquist frequency point, obtain the full stopband attenuation of wave filter, this characteristic can prevent that the signal aliasing that is greater than nyquist frequency from feeding back in input signal bandwidth better, AD7765 chip provides low-power consumption mode, can significantly reduce power consumption, but can not reduce output data rate or available input bandwidth, dsp processor is selected 32 floating-point TMS320C6745 chips of TI company low-power consumption, this dsp processor is taking C674xDSP core as basis, possess the floating-point advantage online periphery unique with past fixed DSP, the characteristic such as low-power consumption and low cost, frequency can reach 300MHz, comprise a group system control dedicated serial port and the multichannel message serial port (McASP) of 16 serial devices and fifo buffer nearly, in addition more comprise two external memory interfaces: 8 external asynchronous memory interfaces (EMIFA) and the applicable high speed 16 bit synchronization external memory interfaces (EMIFB) of SDRAM that NAND/NOR flash memory is suitable for.
The low power dissipation design of front-collection unit has reduced the energy consumption of battery pack, extend power-on time, avoid external power source to be linked into high-pressure side, equipment and the personal safety of test are increased, by fiber optic communication, receive the clock signal that rearmounted processing unit sends over, each sampled value is all stamped to markers, and with serial protocol, sampled value is sent to rearmounted processing unit by optical fiber interface.
Described rearmounted processing unit comprises the first fiber optical transceiver, the second fiber optical transceiver, FPGA, clock module and PowerPC primary processor, the standard source signal sampling value that described the first fiber optical transceiver sends for receiving front-collection unit, and send FPGA to, the measured signal sampled value that described the second fiber optical transceiver sends for receiving merge cells, and send FPGA to, described clock module carries out synchronized sampling for control criterion source signal and measured signal, be connected with FPGA, described FPGA receives for offset data the additive error that link is brought in time domain, and by the data after time domain compensation, send PowerPC primary processor to, carrying out data record ripple and error calculates, FPGA selects the XC3S1000 chip of xilinx company, the sampled value of the measured signal that merge cells (MU) sends, stamped markers by FPGA, the capability of sequential control that FPGA is good, greatly reduce the additive error that data receiver link is brought in time domain, PowerPC primary processor is selected the MPC8247 embedded microprocessor of Freescale company, adopt embedded real-time operating system vxworks, adopt ANSIC procedural language to write application program, the real time data that can ensure to greatest extent system receives, Sudden Changing Rate is differentiated, and data record ripple and error are calculated.
Described rearmounted processing unit also comprises man-machine interface, described man-machine interface is connected with PowerPC primary processor, described man-machine interface comprises high-resolution color LCD display, be used for the graphical drafting of data, error parameter shows, carry out the exploitation of interface and interactive software based on the shape library WindML of vxworks, WindML provides basic figure, video, audion technic, display mode setting is provided, standard input output is controlled, the functions such as point-line-surface mapping, and provide the framework of a design standard device driver, provide a series of instruments to be used for processing input equipment and process event.
As shown in Figure 1, the detection method of the transient characterisitics detection system of the electronic type voltage transformer based on above-mentioned, comprises the following steps,
Step (1), according to formula (1), determines primary side high voltage U1The output voltage U of power supply1
Wherein, UpFor primary side high voltage U1The virtual value of fundametal compoment, f is fundamental frequency,For starting phase angle, UdcFor DC component, Ures(t) be residual voltage component.
Step (2), by controlling relay protection condition simulation unit, control tested electronic type voltage transformer and enter the relay protection of primary side short circuit or the relay protection of circuit band delay electric charge reclosing, method is closed second switch CB2, control the first switch CB1 by being disconnected to closure, making the voltage of tested electronic type voltage transformer primary side reduce to zero, is the relay protection of primary side short circuit; Disconnect the first switch CB1, control second switch CB2 at primary side high voltage U1Positive peak place by being closed into disconnection, at primary side high voltage U1Negative peak place by being disconnected to closure, be the relay protection that circuit band is detained electric charge reclosing.
The specified phase deviation of step (3) to measured signalWith specified delay time tdRevised, each sampled value of measured signal is carried out to time calibrating, and markers correctionWherein frFor the rated frequency value of tested electronic type voltage transformer, thereby make revised measured signal sampled value synchronize and process by markers with standard source signal sampling value;
Step (4) catches mutation voltage Δ u by transient detection, and mutation voltage Δ u is formula (2),
Δu=|u(t)-u(t-2T)|(2)
Wherein, t is current time, and T is a power frequency cycle time, and u (t) is current instantaneous voltage.
Step (5), as Δ u > when Uset, Uset is threshold voltage, Uset=0.4Up, be judged to be transient state initial;
Step (6) is if the relay protection of primary side short circuit is searched for the magnitude of voltage U of the previous cycle measured signal of transient state initial timetestPeak value Umax, and to instantaneous voltage and 0.1U after transient state initial time one cyclemaxCarry out amplitude judgement, whether qualified to judge the transient characterisitics of primary side short circuit, if the instantaneous voltage after transient state initial time one cycle is greater than 0.1Umax, the transient characterisitics of primary side short circuit are qualified.
Step (7) is if circuit band is detained the relay protection of electric charge reclosing, two cycles from transient state initial time start, whether the instantaneous voltage error ε calculating in two to three cycle time windows is greater than 10%, whether the instantaneous voltage error ε in three to four half cycles time windows is greater than 5%, whether qualified to judge the transient characterisitics of circuit band delay electric charge reclosing, if the instantaneous voltage error ε in two to three cycle time windows is greater than 10%, instantaneous voltage error ε in three to four half cycles time windows is greater than 5%, and the transient characterisitics that circuit band is detained electric charge reclosing are qualified, the method of wherein calculating instantaneous voltage error ε is,
(1) error voltage Ue=Utest-Uref, wherein UtestFor the magnitude of voltage of measured signal, UrefFor the magnitude of voltage of standard source signal;
(2) by formula (3), obtain instantaneous voltage error ε, formula (3) is as follows,
ϵ = U e * 100 / 2 U p - - - ( 3 )
Wherein, UpFor primary side high voltage U1The virtual value of fundametal compoment.
More than show and described general principle of the present invention, principal character and advantage. The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and description, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention. The claimed scope of the present invention is defined by appending claims and equivalent thereof.

Claims (7)

1. a transient characterisitics detection system for electronic type voltage transformer, is characterized in that:Comprise that relay protection condition simulation unit, high frequency divider, merge cells and transient characterisitics detectUnit, the primary side high voltage U of described relay protection condition simulation unit output1Give tested electronicsFormula voltage transformer provides test different brackets voltage used, primary side high voltage U1Also pass throughHigh frequency divider is converted into low-voltage, as the standard source signal U of transient characterisitics detecting unit2,Tested electronic type voltage transformer and high frequency divider are in parallel, and together with relay protection conditionSimulation unit is in parallel, and the sampled value of tested electronic type voltage transformer is by the light of merge cellsFine interface sends to transient characterisitics detecting unit, as the measured signal of transient characterisitics detecting unit;
Described relay protection condition simulation unit comprises the primary side high voltage U of output1Power supply,The first switch CB1 and second switch CB2, described the first switch CB1 is connected in parallel on two of power supplyEnd, connect with the positive pole of power supply in one end of described second switch CB2, and the other end is transient state examinationTest the primary side high voltage U of condition simulation unit1Output;
Described transient characterisitics detecting unit comprises and is positioned on high-tension side front-collection unit, for adoptingCollection and cleanup standard source signal, and send rearmounted processing unit to;
Be positioned at the rearmounted processing unit of low-pressure side, for receiving measured signal and front-collection unitThe standard source signal gathering, and catch the Sudden Changing Rate of relay protection, carry out data record ripple and mistakePoor calculating;
Between described front-collection unit and rearmounted processing unit by fiber optic communication, described postpositionProcessing unit also by optical fiber be positioned on high-tension side merge cells and communicate, all adoptIEC61850-9-1, IEC61850-9-2 or FT3 communication protocol;
Described front-collection unit comprises dsp processor, electric pressure converter, signal condition electricityRoad, ADC Acquisition Circuit, battery pack, optical transmitter and optical receiver, described standard source letterNumber U2Be connected with signal conditioning circuit by electric pressure converter, described signal conditioning circuit is also logicalCross ADC Acquisition Circuit and be connected with dsp processor, described dsp processor is sent out by lightSend device that the standard source signal data of collection is sent to rearmounted processing unit, described DSP processesDevice receives by optical receiver the clock sync signal that rearmounted processing unit sends, and clock is sameStep signal sends ADC Acquisition Circuit to, controls collection period, and described battery pack is for improvingOperating voltage.
2. the transient characterisitics of electronic type voltage transformer according to claim 1 detect systemSystem, is characterized in that: described signal conditioning circuit is provided with cut-off frequency and is not less than the low of 20kHzPass filter circuit; The AD chip of described ADC Acquisition Circuit is 24 high-speed sampling chips.
3. the transient characterisitics of electronic type voltage transformer according to claim 1 detect systemSystem, is characterized in that: described rearmounted processing unit comprises the first fiber optical transceiver, the second optical fiberTransceiver, FPGA, clock module and PowerPC primary processor, described the first optical fiber transceivingThe standard source signal sampling value that device sends for receiving front-collection unit, and send FPGA to;The measured signal sampled value that described the second fiber optical transceiver sends for receiving merge cells, and passGive FPGA; Described clock module is synchronizeed with measured signal for control criterion source signalSampling, is connected with FPGA, and described FPGA receives link in time domain for offset dataThe additive error of bringing, and by the data after time domain compensation, send the main processing of PowerPC toDevice, carries out data record ripple and error and calculates.
4. the transient characterisitics of electronic type voltage transformer according to claim 1 detect systemSystem, is characterized in that: described rearmounted processing unit also comprises man-machine interface, described man-machine interfaceBe connected with PowerPC primary processor, described man-machine interface comprises high-resolution colourLCD display, shows for the graphical drafting, the error parameter that complete data.
5. the transient characterisitics of electronic type voltage transformer according to claim 1 detect systemThe detection method of system, is characterized in that: comprises the following steps,
Step (1), according to formula (1), determines primary side high voltage U1The output electricity of power supplyPress U1
Wherein, UpFor primary side high voltage U1The virtual value of fundametal compoment, f is fundamental frequency,For starting phase angle, UdcFor DC component, Ures(t) be residual voltage component;
Step (2), by controlling relay protection condition simulation unit, controls tested electronic type electricityPress transformer to enter the relay protection of primary side short circuit or circuit band and be detained electric charge reclosingRelay protection;
The specified phase deviation of step (3) to measured signalWith specified delay time tdAddTo revise, each sampled value of measured signal is carried out to time calibrating, and markers correctionWherein frFor the rated frequency value of tested electronic type voltage transformer,Thereby revised measured signal sampled value is synchronizeed by markers with standard source signal sampling valueProcess;
Step (4) catches mutation voltage Δ u by transient detection, and mutation voltage Δ u is publicFormula (2),
Δu=|u(t)-u(t-2T)|(2)
Wherein, t is current time, and T is a power frequency cycle time, and u (t) is current instantaneousVoltage;
Step (5), as Δ u > when Uset, Uset is threshold voltage, Uset=0.4Up, judgeFor transient state initial;
Step (6) if the relay protection of primary side short circuit search for before transient state initial timeThe magnitude of voltage U of a cycle measured signaltestPeak value Umax, and to transient state initial time one weekInstantaneous voltage after ripple and 0.1UmaxCarry out amplitude judgement, to judge the temporary of primary side short circuitWhether step response is qualified, if the instantaneous voltage after transient state initial time one cycle is greater than 0.1Umax,The transient characterisitics of primary side short circuit are qualified;
Step (7) is if circuit band is detained the relay protection of electric charge reclosing, initial from transient stateTwo cycles after moment start, and calculate the instantaneous voltage error in two to three cycle time windowsWhether whether ε be greater than 10%, three to four instantaneous voltage error ε in half cycles time windowBe greater than 5%, whether qualified to judge the transient characterisitics of circuit band delay electric charge reclosing, if twoInstantaneous voltage error ε in three cycle time windows is greater than 10%, and three to four half cyclesInstantaneous voltage error ε in ripple time window is greater than 5%, and circuit band is detained electric charge reclosingTransient characterisitics are qualified.
6. the transient characterisitics of electronic type voltage transformer according to claim 5 detect systemThe detection method of system, is characterized in that: step (2), and by controlling the emulation of relay protection conditionUnit, controls tested electronic type voltage transformer and enters relay protection or the line of primary side short circuitThe method that road band is detained the relay protection of electric charge reclosing is closed second switch CB2, controls theOne switch CB1, by being disconnected to closure, makes the voltage of tested electronic type voltage transformer primary sideReducing to zero, is the relay protection of primary side short circuit; Disconnect the first switch CB1, control second and openClose CB2 at primary side high voltage U1Positive peak place by being closed into disconnection, at the high electricity of primary sidePress U1Negative peak place by being disconnected to closure, be the relay protection that circuit band is detained electric charge reclosing.
7. the transient characterisitics of electronic type voltage transformer according to claim 5 detect systemThe detection method of system, is characterized in that: the method for calculating instantaneous voltage error ε is,
(1) error voltage Ue=Utest-Uref, wherein UtestFor the magnitude of voltage of measured signal, UrefFor the magnitude of voltage of standard source signal;
(2) by formula (3), obtain instantaneous voltage error ε, formula (3) is as follows,
ϵ = U e * 100 / 2 U p - - - ( 3 )
Wherein, UpFor primary side high voltage U1The virtual value of fundametal compoment.
CN201310407411.8A 2013-09-09 2013-09-09 Transient characterisitics detection system and the method for electronic type voltage transformer CN103630866B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106772190A (en) * 2016-11-23 2017-05-31 国家电网公司 The test comparison method and device of electronic type voltage transformer under the conditions of a kind of VFTO

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104007346B (en) * 2014-05-28 2017-02-22 广西电网公司电力科学研究院 Analog quantity merging unit transient state delay test method based on frequency scanning
CN103969536B (en) * 2014-06-04 2016-06-22 贵州电力试验研究院 Instrument transformer transient characteristic method of testing based on Luo-coil Digital Simulation
CN103969537B (en) * 2014-06-04 2017-08-25 贵州电力试验研究院 Analog quantity, the transformer interference source test system and method for digital quantity mixing collection
CN104268419B (en) * 2014-10-09 2017-04-12 国电南瑞科技股份有限公司 Method for recognizing distortion of analog sampling data
CN105372611B (en) * 2015-11-27 2018-08-07 许昌许继软件技术有限公司 The reliability verification method of SV data is acquired based on wave recording device
CN105548942A (en) * 2016-01-18 2016-05-04 云南电网有限责任公司电力科学研究院 System and method for analyzing transient characteristics of electronic current transformer
CN105572619A (en) * 2016-03-03 2016-05-11 云南电网有限责任公司电力科学研究院 Online transient test system for electronic current transformer
CN107525978A (en) * 2016-06-22 2017-12-29 辽宁省送变电工程公司 A kind of combining unit transient current method of testing and device based on transient state source
CN107544046B (en) * 2016-06-24 2020-11-17 中国电力科学研究院 Online error measurement system and method for voltage transformer
CN108802658A (en) * 2017-04-26 2018-11-13 西门子公司 The device and method for detecting residual voltage state in capacitive voltage transformer
CN108051769A (en) * 2017-12-12 2018-05-18 中国西电电气股份有限公司 A kind of capacitance type potential transformer transient response experimental rig and test method
CN108322216A (en) * 2018-03-07 2018-07-24 国网浙江省电力有限公司电力科学研究院 A method of protecting sampled data influence of noise for reducing high speed transient amount
CN108508399B (en) * 2018-04-02 2020-12-15 国网安徽省电力有限公司电力科学研究院 Voltage transient test method based on electronic voltage transformer transmission process simulation
CN108919158B (en) * 2018-07-17 2020-07-14 国网四川省电力公司电力科学研究院 On-site calibration method of non-contact transient voltage measuring device of alternating-current transformer substation
CN108693495B (en) * 2018-09-06 2021-03-12 广东电网有限责任公司 Sampling self-adaptive direct-current electronic transformer detection converter
CN110018435A (en) * 2019-02-21 2019-07-16 国网山东省电力公司临沂供电公司 Electronic mutual inductor calibration system and calibration method

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4338589A (en) * 1979-02-13 1982-07-06 Hewlett-Packard Company Autocalibration of compressed A/D converter
CN101545939A (en) * 2009-04-28 2009-09-30 江苏省电力试验研究院有限公司 System for verifying transient characteristics of electronic transformer compatible with IEC61850 protocol
CN102073028A (en) * 2010-10-21 2011-05-25 中国南方电网有限责任公司超高压输电公司柳州局 Onsite stable state precision calibration system of electronic voltage transformer and calibration method thereof
CN102073029B (en) * 2011-02-16 2013-06-12 安徽省电力公司合肥供电公司 Electronic mutual inductor test system and test method
CN102269787B (en) * 2011-05-16 2013-05-15 国网电力科学研究院 Detection method of harmonic characteristic of electronic voltage transformer and detection device thereof
CN102401889A (en) * 2011-11-08 2012-04-04 国网电力科学研究院 Online checking method for high-tension current transformer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106772190A (en) * 2016-11-23 2017-05-31 国家电网公司 The test comparison method and device of electronic type voltage transformer under the conditions of a kind of VFTO

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