CN108957113A - Network-based transformer substation capacitor electric current Online Transaction Processing and test method - Google Patents
Network-based transformer substation capacitor electric current Online Transaction Processing and test method Download PDFInfo
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- CN108957113A CN108957113A CN201810792380.5A CN201810792380A CN108957113A CN 108957113 A CN108957113 A CN 108957113A CN 201810792380 A CN201810792380 A CN 201810792380A CN 108957113 A CN108957113 A CN 108957113A
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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
Abstract
The invention discloses a kind of network-based transformer substation capacitor electric current Online Transaction Processing and measurement methods, pass through setting CPU element and the analog board connecting with CPU element, interface board, power supply unit, touch screen unit, Petersen coil control unit and resonance eliminator control unit, analog board is connect with interface board, interface board is connected to multichannel circuit under test, it is controlled using CPU element by interface board and realizes multichannel measurement, and utilize CPU element control Petersen coil control unit and resonance eliminator control unit, realize that the connection status and state of Petersen coil and resonance eliminator return, it ensure that the in stable condition of resonance eliminator and Petersen coil, realize that the state of Petersen coil and resonance eliminator in circuit under test is automatically controlled by Petersen coil control unit and resonance eliminator control unit, it avoids and when each measurement needs artificially to have a power failure Operation does not need the state of scene confirmation resonance eliminator and Petersen coil, reduces labor intensity of workers, by CPU element automatic measurement, as a result accurately.
Description
Technical field
The invention belongs to the studying technological domains of transformer substation capacitor electric current Online Transaction Processing, are related to a kind of network-based
Transformer substation capacitor electric current Online Transaction Processing and test method.
Background technique
The precise measurement of capacitor current for earthing is the premise of Petersen coil reasonable compensation at present, and it is current it is automatic with
There is also some problems for measurement of the track compensation device to capacitance current, especially with the raising of cable run ratio, power grid
Degree of asymmetry further declines.The measurement accuracy of previous measuring device, the network small to these degrees of asymmetry declines to a great extent very
To being unable to measure, it is therefore necessary to expand the scope of application of capacitance current measurement device to meet growing needs.And base
Being applicable not only to traditional power grid in the capacitance current measurement principle of signal injection method, to be particularly useful for power grid degree of asymmetry small
Power grid, actual needs can be substantially met.The principle of signal injection method is constantly to be sent out from microcomputer measuring and controlling device to power grid
Alien frequencies signal, while receiving the feedback signal from power grid can be by being calculated electricity according to corresponding equivalent circuit and algorithm
The capacitive earth current value of net.
It being required according to associate power operating standard, isolated neutral system capacitance current reaches 10A (35kV) and 30A (10kV),
System neutral must install Petersen coil.After single-phase earthing occurs in system, grounding point flows through capacitance current, and neutral point occurs
Electric voltage displacement, the Petersen coil for being mounted on neutral point just provide inductive current, make grounding point condenser current compensation to lesser number
Value prevents ground connection arc short-circuit, while lowering arc-gap voltage resume speed, improves arc gap dielectric strength, prevents arc reignition, make
At intermittent grounding surge.The clamped effect of Petersen coil, can also be effectively prevented the generation of ferro-resonance over-voltage.
The Petersen coil on neutral point must be first disconnected in test, Petersen coil is either with or without the judgement disconnected as us
Condition, and Petersen coil is returned either with or without the state of disconnection, as the Rule of judgment for starting test.After only Petersen coil disconnects
Just start to test.It must be shorted resonance eliminator in test, judge whether resonance eliminator short circuit succeeds, and using this as testing capacitor electricity
The Rule of judgment of stream.Standard testing principle is as shown in Figure 1.
System operation mode shown in FIG. 1 be from the method for operation necessary to open delta measuring system capacitance current,
And for general distribution network systems, be not under such method of operation, for example, be further connected in systems Petersen coil,
The high-pressure side PT neutral point is connected to high resistant resonance eliminator, PT open delta is connected to secondary resonance elimination device etc..Common uses the wiring side 3PT
Its method of operation of the distribution of formula is as shown in Figure 2.
In order to use tester to carry out the measurement of capacitance current, it is necessary to which the method for operation is converted to Fig. 1, mark shown in Fig. 3
The quasi- method of operation.Secondary operation personnel compounding practice is needed above and is confirmed.
It when the prior art measures capacitance current every time, needs to have a power failure, is shorted resonance eliminator and disconnection arc extinguishing coil, upper electrical measurement
Amount is measured subsequent teasel root electricity, restores the reset condition of resonance eliminator and Petersen coil；Prior art people must arrive scene every time
Confirm the state of resonance eliminator and Petersen coil.
Summary of the invention
The purpose of the present invention is to provide a kind of network-based transformer substation capacitor electric current Online Transaction Processing and test sides
Method, with overcome the deficiencies in the prior art.
In order to achieve the above objectives, the present invention adopts the following technical scheme:
Network-based transformer substation capacitor electric current Online Transaction Processing, including CPU element and the mould being connect with CPU element
Quasi- plate, interface board, power supply unit, touch screen unit, Petersen coil control unit and resonance eliminator control unit, analog board and interface
Plate connection；
Interface board is used for the switching of multichannel circuit under test；
CPU element is for signal output, signal acquisition and signal processing；
Analog board includes pumping signal unit and signal acquisition unit；
CPU element issues pumping signal to circuit under test by analog board, and signal acquisition unit is for acquiring circuit under test
Feedback signal is simultaneously transmitted to CPU element；
Petersen coil control unit is used to control the connection status of the Petersen coil in circuit under test and state returns；
Resonance eliminator control unit is used to control the connection status of the resonance eliminator in circuit under test and state returns；
Power supply unit is used for system power supply, and operation of the touch screen unit for CPU element controls.
It further, further include the distal end host computer controlled for realizing CPU element far-end operation, distal end host computer is used for
Realize measurement and real-time monitoring to circuit under test capacitance current in distal end, by distal end host computer can be realized long-range measurement,
Parametric calibration and parameter setting function, the monitoring interface real-time display on the host computer of distal end measure progress.
Further, intelligent controller or contactor is respectively adopted in resonance eliminator control unit and Petersen coil control unit,
The state of resonance eliminator and Petersen coil in circuit under test controls and state returns.
Further, the line packet K of the outlet terminal connection contactor of CPU element2, line that CPU element passes through contactor
Wrap K2It controls on Petersen coil route with the concatenated control switch K2 of Petersen coil, realizes that Petersen coil is disconnected in circuit under test
The auxiliary contact of road and access, Petersen coil are coupled with the feedback terminal of CPU element, realize that the state of resonance eliminator returns.
Further, the line packet K of the outlet terminal connection contactor of CPU elementi, line that CPU element passes through contactor
Wrap KiControl the control switch K in parallel with resonance eliminator on resonance eliminator route, realize resonance eliminator in circuit under test it is short-circuit with it is logical
Road, the auxiliary contact of resonance eliminator are coupled with the feedback terminal of CPU element, realize that the state of resonance eliminator and Petersen coil returns.
Further, CPU element uses TMS320F2812CPU processor.
Further, power supply unit uses the excitation power supply of low ripple low noise.
It further, further include the secondary harmonic elimination control unit for being connected to CPU element, secondary harmonic elimination control unit is for controlling
The connection status and state of secondary resonance elimination device processed return.
A kind of transformer substation capacitor electric current on-line testing method, which comprises the following steps:
Step 1), CPU element issue circuit switching signal to interface board, and interface board, which switches to test macro, to be needed to measure
Circuit under test all the way；
Step 2), CPU element issue electric signal to the Petersen coil that disconnection arc extinguishing coil is connect with circuit under test and control list
Member, Petersen coil control unit cut off circuit under test on Petersen coil, Petersen coil control unit by Petersen coil with it is to be measured
Circuit connection state feeds back to CPU element；CPU element issues the resonance eliminator signal in short-circuit circuit under test to resonance eliminator control simultaneously
Unit processed, the resonance eliminator in resonance eliminator control unit short circuit circuit under test, resonance eliminator control unit is by the harmonic elimination in circuit under test
Device connection status feeds back to CPU element；
Step 3), CPU element receive resonance eliminator control unit and Petersen coil control unit feedback signal, if harmonic elimination
Device and Petersen coil are respectively at short circuit and off state, CPU element issue the excitation for measuring circuit under test capacitance current
Pumping signal is transmitted to circuit under test by interface board by signal to analog board, analog board, and pumping signal is after circuit under test
Signal acquisition unit is fed back to, the pumping signal after circuit under test is fed back to CPU element by signal acquisition unit, and CPU is mono-
Member handles the pumping signal after circuit under test, realizes the capacitance current detection in circuit under test.
Further, in step 2), there are secondary resonance elimination device, CPU element in the circuit under test all the way if necessary to measurement
It issues and disconnects the electric signal that connect with circuit under test of secondary resonance elimination device to secondary harmonic elimination control unit, secondary harmonic elimination control unit
Disconnect the connection of secondary resonance elimination device and circuit under test.
Compared with prior art, the invention has the following beneficial technical effects:
A kind of network-based transformer substation capacitor electric current Online Transaction Processing of the present invention, by setting CPU element and with
Analog board, interface board, power supply unit, touch screen unit, Petersen coil control unit and the resonance eliminator control list of CPU element connection
Analog board is connect by member with interface board, and interface board is connected to multichannel circuit under test, is controlled in fact using CPU element by interface board
Existing multichannel measurement, and using CPU element control Petersen coil control unit and resonance eliminator control unit, realize Petersen coil with
The connection status and state of resonance eliminator return, and ensure that the in stable condition of resonance eliminator and Petersen coil, and pass through Petersen coil
Control unit and resonance eliminator control unit realize that the state of Petersen coil and resonance eliminator in circuit under test automatically controls, and avoid
The operation for needing artificially to have a power failure when measurement every time does not need the state of scene confirmation resonance eliminator and Petersen coil, reduces worker
Labor intensity, measurement efficiency is high, by CPU element automatic measurement, as a result accurately.
Further, further include the distal end host computer controlled for realizing CPU element far-end operation, can be realized distal end and control
System measurement, it is efficient and convenient.
Further, CPU element uses TMS320F2812CPU processor, and stable structure is high-efficient.
A kind of transformer substation capacitor electric current on-line testing method accesses circuit under test by CPU element control interface plate first；
It realizes the automatic control between multichannel circuit under test, then utilizes CPU element control Petersen coil control unit and resonance eliminator control
Unit processed realizes that resonance eliminator in circuit under test and Petersen coil control are in a state to be tested, and is received and gone out by CPU element
Arc coil control unit and resonance eliminator control unit state return signal；Data are accurate, avoid the operation artificially having a power failure and
The state of scene confirmation resonance eliminator and Petersen coil.
Further, the disconnection that secondary harmonic elimination control unit realizes secondary resonance elimination device is controlled using CPU element, utilized
CPU element can be realized the full control that circuit is once run in circuit under test, avoid leaking disconnected secondary resonance elimination device in manual operation,
Cause result inaccurate.
Detailed description of the invention
Fig. 1 is the existing capacitance current measurement figure based on signal injection method.
Fig. 2 is the existing distribution method of operation figure using the 3PT mode of connection.
Fig. 3 is existing distribution method of operation transfer principle figure.
Fig. 4 is present system structural block diagram.
Fig. 5 is CPU element power supply and reset circuit figure.
Fig. 6 is CPU element storage circuit figure.
Fig. 7 is that CPU element deposits reading circuit figure.
Fig. 8 is CPU element external world terminal structure schematic diagram.
Fig. 9 is analog board signal acquisition unit circuit diagram.
Figure 10 is analog board pumping signal element circuit schematic diagram.
Figure 11 is present system power supply unit schematic diagram.
Figure 12 is present system interface board schematic diagram.
Figure 13 is that present system tests structural schematic diagram.
Figure 14 is Petersen coil control unit attachment structure schematic diagram of the present invention.
Figure 15 is resonance eliminator control unit attachment structure schematic diagram of the present invention.
Specific embodiment
The invention will be described in further detail with reference to the accompanying drawing:
As shown in Fig. 4, Figure 13, network-based transformer substation capacitor electric current Online Transaction Processing, including CPU element and with
Analog board, interface board, power supply unit, touch screen unit, Petersen coil control unit and the resonance eliminator control list of CPU element connection
Member；Analog board is connect with interface board；
Interface board is used for the switching of multichannel circuit under test, the interface of interface board be connected to simultaneously multiple needs measure it is to be measured
Circuit；
CPU element is for signal output, signal acquisition and signal processing；
Analog board includes pumping signal unit and signal acquisition unit；
CPU element issues pumping signal to circuit under test by analog board, and signal acquisition unit is for acquiring circuit under test
Feedback signal is simultaneously transmitted to CPU element；
Petersen coil control unit is used to control the connection status of the Petersen coil in circuit under test and state returns, and needs
Disconnection arc extinguishing coil and state return when measuring the capacitance current in circuit under test, do not need to keep Petersen coil to connect when measurement
It connects, and Petersen coil connection status is back to CPU element
Resonance eliminator control unit is used to control the connection status of the resonance eliminator in circuit under test and state returns, and needs to measure
Short circuit resonance eliminator when capacitance current in circuit under test does not need to keep resonance eliminator connection when measurement, and resonance eliminator is connected shape
State is back to CPU element；
Power supply unit is used for system power supply, and operation of the touch screen unit for CPU element controls.
CPU element uses TMS320F2812CPU processor；TMS320F2812 is dsp processor, 32 fixed point high speed numbers
Word processing device, maximum operating frequency 150M；
It further include secondary harmonic elimination control unit, secondary harmonic elimination control unit is connected to CPU element, for controlling secondary harmonic elimination
The connection status and state of device return；
A kind of transformer substation capacitor electric current on-line testing method, which comprises the following steps:
Step 1), CPU element issue circuit switching signal to interface board, and interface board, which switches to test macro, to be needed to measure
Circuit under test all the way；
Step 2), CPU element issue electric signal to the Petersen coil that disconnection arc extinguishing coil is connect with circuit under test and control list
Member, Petersen coil control unit cut off circuit under test on Petersen coil, Petersen coil control unit by Petersen coil with it is to be measured
Circuit connection state feeds back to CPU element；CPU element issues the resonance eliminator signal in short-circuit circuit under test to resonance eliminator control simultaneously
Unit processed, the resonance eliminator in resonance eliminator control unit short circuit circuit under test, resonance eliminator control unit is by the harmonic elimination in circuit under test
Device connection status feeds back to CPU element；
Step 3), CPU element receive resonance eliminator control unit and Petersen coil control unit feedback signal, if harmonic elimination
Device and Petersen coil are respectively at short circuit and off state, CPU element issue the excitation for measuring circuit under test capacitance current
Pumping signal is transmitted to circuit under test by interface board by signal to analog board, analog board, and pumping signal is after circuit under test
Signal acquisition unit is fed back to, the pumping signal after circuit under test is fed back to CPU element by signal acquisition unit, and CPU is mono-
Member handles the pumping signal after circuit under test, realizes the capacitance current detection in circuit under test.
In step 2), there is secondary resonance elimination device in the circuit under test all the way if necessary to measurement, CPU element, which issues, disconnects two
The electric signal that secondary harmonic elimination apparatus is connect with circuit under test to secondary harmonic elimination control unit, secondary harmonic elimination control unit disconnects secondary disappear
The connection of humorous device and circuit under test.
As shown in fig. 6, IS61LV25616AL enters standby mode when/CE is in high level；In such a mode, power consumption
CMOS can be reduced to input standard；Using IS61LV25616AL low triggering chip select pin (/CE) and export enabled pin (/
OE), memory expansion is realized；Write-in and reading that enabled pin (/WE) will fully control memory is written in low triggering；It is same
High-order (/UB) is allowed to access for byte and low level (/LB) is accessed；
As shown in fig. 7, built-in 128K*16 FLASH in TMS320F2812 piece, is consolidated using what programming plug-in unit can be convenient
Change user program, FLASH can be encrypted；Built-in 18K*16 SRAM in TMS320F2812 piece；Built-in 4K* in TMS320F2812 piece
16 BOOT ROM；Built-in 1K*16 OTP ROM in TMS320F2812 piece；Extend 256K*8 RAM, FM25L256B-G type
It number is widely used, the data for possessing unlimited read-write cycle and 10 years retain；256K*16 SRAM, IS61LV25616 are extended,
For data-storing；IS61LV25616AL is the high-speed static random access memory of a 256K*16 word lengths；
IS61LV25616AL is manufactured using the high-performance CMOS process of ISSI company, high-performance, low-power consumption；Special reset chip
MAX706R guarantees reliable reset, there is individual reset button, can hand-reset；
As shown in figure 8, the two-way RS-232 of CPU element connects serial ports, RS-232 connects serial ports touch screen unit, i.e. pin all the way
155 and 157 pin touch screen units；Another way RS-232, which connects serial ports and connects USR-TCP232-T2 serial ports, turns network interface；For network interface
Position machine communication, network linking, specific pin 90 and pin 91 connect USR-TCP232-T2 serial ports and turn network interface.
CPU element includes 16 road AD input interfaces, and wherein pin 3 and 4 tunnel of pin are connected to analog board, CPU element and mould
Current limliting and operational amplifier circuit, 0~3V of input range are equipped between quasi- plate；
As shown in figure 5, the I/O voltage due to TMS320F2812 is 3.3V level, and ADC is then 5V level, it is therefore desirable to
Electrical level transferring chip 74LVC245 realizes isolation features；1 road DA output interface is provided, MCP4921, which is one, has external electrical
Pressure is with reference to 12 single channels with SPI interface.Just profound wave is exchanged for 0-2.5V when generating measurement；1 EEPROM, core are provided
Piece is 24LC64, with iic bus data transmission experiment；It provides SPI interface to draw, facilitates networking；MCBSP interface is provided to draw
Out；6 tunnel PWM wave output interfaces, inverse plugging design are provided；Extend out the uneven bottoms source input interface on 2 tunnels；Extend out up to 5 tunnels
Maskable interrupts source input interface, wherein 1 tunnel can be triggered by key；Up to 50 road CPLD I/O interfaces are provided；In dsp system
All use multisystem power supply power supply, TPS767D318 power supply chip, it is possible to provide different electrical power (+5V, 3.3V, 3.3VA, 1.8V,
GND, GNDF), maximum output current 1000MA；
Analog board includes pumping signal unit and signal acquisition unit；
As shown in Figure 10, pumping signal unit: from external wiring terminal PT open delta signal sampling from external capacitor
Value, through high-power MOS 2SK1020 signal processing, optocoupler 521 is isolated, and is loaded on the 2.5V sine wave that single-chip simulation goes out.
As shown in figure 9, signal acquisition unit: pumping signal is loaded into the i.e. single 8 channel number words control simulation electronic of CD4051B
Switch inputs into control signal A, B, C and INH there are three two, has low conduction impedance and very low cut-off leakage current；Amplitude
The analog signal of peak value to 20V can control to be sent to through amplifier TL082CP data processing for the digital signal of 4.5~20V
MAX267 converts digital signal for analog signal and is sent to DSP data processing；Send display and distal end host computer.
As shown in figure 11, power supply unit is directly provided by external power supply module, more reliable and more stable；The work of offer system
Supply voltage+5V, -5V ,+9V；Input AC 220V is selected, the input terminal of power supply unit is input to after switching, power supply is single
First output voltage is respectively+5V, -5V ,+9V ,+12V；It ensure that the reliability and stability of system working power.Excitation is provided
Power supply+the 30V, -30V of signal.
In the present system in view of the sampling of excitation power supply ripple and influence of noise data, using the confession of low ripple low noise
Electric unit provides excitation power supply.
As shown in figure 12, interface board receives certain measuring signal all the way of measurement that CPU element sends, amplifies through triode
Certain corresponding relay all the way of driving, connects Measurement channel, is then issued and swashed by pumping signal transmission unit by CPU element
It encourages signal, after pumping signal passes through circuit under test, feeds back return signal, signal acquisition unit is by collected feedback signal transmission
To CPU element；
It communicates network interface measurement and receives serial port of mainboard communications protocol, communicated through network interface and host computer.
State returns to the auxiliary contact for being connected to corresponding relay, realizes resonance eliminator and Petersen coil through DSP judgement feedback
State return.
Touch screen unit: the full menu in Chinese of touch screen unit shows that serial line interface, 5V powers；It can by touch screen unit
To realize on-the-spot test operation and parameter setting function.
Distal end host computer is used for measurement and real-time monitoring in distal end realization to this capacitance current, can by distal end host computer
To realize long-range measurement, parametric calibration and parameter setting function；Monitoring interface real-time display measures progress.It is primary in circuit under test
The full control of operation circuit refer to simultaneously to resonance eliminator, Petersen coil and the secondary resonance elimination device in circuit under test carry out it is short-circuit or
Open circuit control realizes that circuit under test is in a state to be tested.
Resonance eliminator control unit, Petersen coil control unit and secondary harmonic elimination control unit be respectively adopted intelligent controller or
Contactor realizes that the state control of the resonance eliminator and Petersen coil in circuit under test and state return；As shown in figure 14, CPU is mono-
The line packet K of the outlet terminal connection contactor of member2, the line packet K of contactor2Control Petersen coil route on Petersen coil string
The control switch K2 of connection realizes open circuit and access of the Petersen coil in circuit under test；As shown in figure 15, the output of CPU element
The line packet K of terminals connection contactori, the line packet K of contactor2Control control switch in parallel with resonance eliminator on resonance eliminator route
K realizes short circuit and access of the resonance eliminator in circuit under test；It is mono- that the auxiliary contact of resonance eliminator and Petersen coil are coupled with CPU
The feedback terminal of member realizes that the state of resonance eliminator and Petersen coil returns.
Claims (10)
1. network-based transformer substation capacitor electric current Online Transaction Processing, which is characterized in that mono- including CPU element and with CPU
Analog board, interface board, power supply unit, touch screen unit, Petersen coil control unit and the resonance eliminator control unit of member connection, mould
Quasi- plate is connect with interface board；
Interface board is used for the switching of multichannel circuit under test；
CPU element is for signal output, signal acquisition and signal processing；
Analog board includes pumping signal unit and signal acquisition unit；
CPU element issues pumping signal to circuit under test by analog board, and signal acquisition unit is for acquiring circuit under test feedback
Signal is simultaneously transmitted to CPU element；
Petersen coil control unit is used to control the connection status of the Petersen coil in circuit under test and state returns；
Resonance eliminator control unit is used to control the connection status of the resonance eliminator in circuit under test and state returns；
Power supply unit is used for system power supply, and operation of the touch screen unit for CPU element controls.
2. network-based transformer substation capacitor electric current Online Transaction Processing according to claim 1, which is characterized in that also wrap
The distal end host computer for realizing the control of CPU element far-end operation is included, distal end host computer is used to realize in distal end to circuit under test
The measurement and real-time monitoring of capacitance current can be realized long-range measurement, parametric calibration and parameter setting function by distal end host computer
Can, the monitoring interface real-time display on the host computer of distal end measures progress.
3. network-based transformer substation capacitor electric current Online Transaction Processing according to claim 1, which is characterized in that harmonic elimination
Intelligent controller or contactor, the resonance eliminator in circuit under test is respectively adopted in device control unit and Petersen coil control unit
And the state control and state return of Petersen coil.
4. network-based transformer substation capacitor electric current Online Transaction Processing according to claim 3, which is characterized in that CPU
The line packet K of the outlet terminal connection contactor of unit2, CPU element passes through the line packet K of contactor2It controls on Petersen coil route
With the concatenated control switch K2 of Petersen coil, realize open circuit and access of the Petersen coil in circuit under test, Petersen coil it is auxiliary
It helps contact to be coupled with the feedback terminal of CPU element, realizes that the state of resonance eliminator returns.
5. network-based transformer substation capacitor electric current Online Transaction Processing according to claim 3, which is characterized in that CPU
The line packet K of the outlet terminal connection contactor of uniti, CPU element passes through the line packet K of contactoriControl resonance eliminator route on
The control switch K of resonance eliminator parallel connection realizes short circuit and access of the resonance eliminator in circuit under test, the auxiliary contact difference of resonance eliminator
It is connected to the feedback terminal of CPU element, realizes that the state of resonance eliminator and Petersen coil returns.
6. network-based transformer substation capacitor electric current Online Transaction Processing according to claim 1, which is characterized in that CPU
Unit uses TMS320F2812CPU processor.
7. network-based transformer substation capacitor electric current Online Transaction Processing according to claim 1, which is characterized in that power supply
Unit uses the excitation power supply of low ripple low noise.
8. network-based transformer substation capacitor electric current Online Transaction Processing according to claim 1, which is characterized in that also wrap
The secondary harmonic elimination control unit for being connected to CPU element is included, secondary harmonic elimination control unit is used to control the connection of secondary resonance elimination device
State and state return.
9. a kind of transformer substation capacitor electric current based on transformer substation capacitor electric current Online Transaction Processing according to any one of claims 8 is surveyed online
Method for testing, which comprises the following steps:
Step 1), CPU element issue circuit switching signal to interface board, and test macro is switched to need to measure one by interface board
Road circuit under test；
The electric signal that step 2), CPU element sending disconnection arc extinguishing coil are connect with circuit under test goes out to Petersen coil control unit
Arc coil control unit cuts off the Petersen coil in circuit under test, and Petersen coil control unit connects Petersen coil and circuit under test
The state of connecing feeds back to CPU element；CPU element issues resonance eliminator signal to the resonance eliminator in short-circuit circuit under test and controls list simultaneously
Member, the resonance eliminator in resonance eliminator control unit short circuit circuit under test, resonance eliminator control unit connect the resonance eliminator in circuit under test
The state of connecing feeds back to CPU element；
Step 3), CPU element receive resonance eliminator control unit and Petersen coil control unit feedback signal, if resonance eliminator and
Petersen coil is respectively at short circuit and off state, CPU element issue the pumping signal for measuring circuit under test capacitance current
To analog board, pumping signal is transmitted to circuit under test by interface board by analog board, and pumping signal is fed back after circuit under test
To signal acquisition unit, the pumping signal after circuit under test is fed back to CPU element, CPU element pair by signal acquisition unit
Pumping signal after circuit under test is handled, and realizes the capacitance current detection in circuit under test.
10. transformer substation capacitor electric current on-line testing method according to claim 8, which is characterized in that
In step 2), there is secondary resonance elimination device in the circuit under test all the way if necessary to measurement, CPU element, which issues, disconnects secondary disappear
For the electric signal that humorous device is connect with circuit under test to secondary harmonic elimination control unit, secondary harmonic elimination control unit disconnects secondary harmonic elimination dress
Set the connection with circuit under test.
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