CN103616599B - A kind of movable detector for dynamic reactive power compensation and method of testing thereof - Google Patents
A kind of movable detector for dynamic reactive power compensation and method of testing thereof Download PDFInfo
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Abstract
The present invention relates to a kind of movable detector for dynamic reactive power compensation and method of testing thereof.Detector comprises sampling unit, detecting unit, synchronism output unit and disturbance generating unit, and sampling unit is connected with detecting unit and synchronism output unit respectively, and disturbance generating unit is connected with detecting unit and synchronism output unit respectively; Detector is connected with dynamic reactive compensation device, detects primary side and secondary side simultaneously.Instant invention overcomes can the shortcoming of a disturbance testing and emulation simulation test, comprehensively can test under system accidental conditions to dynamic reactive compensation device complete machine simultaneously.Movable detector for dynamic reactive power compensation with the secondary side voltage of disturbance voltage current transformer for target, place capacity is little, compact conformation, equipment set can be arranged in the space of the accurate cabinet size of two station symbols, be fixed in small electrical tool car and transport, Different field is tested, realizes the packaged type test function of equipment.
Description
Technical field
The present invention relates to pick-up unit and the detection method thereof of reactive power compensator, be specifically related to a kind of movable detector for dynamic reactive power compensation and method of testing thereof.
Background technology
At present, dynamic passive compensation equipment has been widely used in the wind energy turbine set of China, generation of electricity by new energy and industrial circle.Along with wind-power electricity generation proportion in electric power energy is increasing, wind generator system can not be ignored the impact of power network safety operation.The control performance of the dynamic reactive voltage compensation equipment that wind energy turbine set is installed will directly have influence on safe and stable operation and the high-low voltage ride-through capability of Wind turbines.Therefore, the Site Detection before wind energy turbine set dynamic passive compensation equipment investment is most important.
Conventional wind energy turbine set dynamic reactive compensation device test can be divided into a disturbance testing and emulation simulation test.Namely disturbance test directly produces disturbance at electrical network primary side and tests, and affects wind energy turbine set and normally runs, and the large cost of equipment volume is high simultaneously, not easily moves.Analog simulation test adopts Digital Simulation mould electric network fault with regard to power electronic devices, reactive compensator controller is tested, the method can the properties of full test controller, but analogue system is expensive and cannot test the overall performance of dynamic reactive compensation device.
Summary of the invention
For the deficiencies in the prior art, the object of this invention is to provide a kind of movable detector for dynamic reactive power compensation, another object is to provide a kind of packaged type dynamic reactive compensation device method of testing, instant invention overcomes can the shortcoming of a disturbance testing and emulation simulation test, comprehensively can test under system accidental conditions to dynamic reactive compensation device complete machine simultaneously.
The object of the invention is to adopt following technical proposals to realize:
The invention provides a kind of movable detector for dynamic reactive power compensation, described detector is connected with dynamic reactive compensation device, its improvements are, described detector comprises sampling unit, detecting unit, synchronism output unit and disturbance generating unit, described sampling unit is connected with detecting unit and synchronism output unit respectively, and described disturbance generating unit is connected with detecting unit and synchronism output unit respectively; Described detector detects primary side and the secondary side of dynamic reactive compensation device simultaneously;
The voltage and current signal of analog quantity for gathering the access point of dynamic reactive compensation device and examining point voltage and current signal, and is converted to digital signal by described sampling unit, digital signal is transferred in detecting unit and synchronism output unit respectively;
Described detecting unit, for detecting gathered voltage and current signal, carries out phase-locked process to gathered signal, and is sent to by lockin signal in disturbance generating unit and synchronism output unit;
The disturbance of generation, harmonic wave and voltage fluctuation signal, for generation of the disturbance needed for dynamic reactive compensation device performance test, harmonic wave and voltage fluctuation signal, are loaded in the sampled signal of system voltage and electric current in synchronous or asynchronous mode by described disturbance generating unit simultaneously;
Described synchronism output unit is used for the electric current and voltage sampled signal after to loading disturbance and carries out phase-locking adjustment, and the deviation of signal that dynamic reactive compensation device is finally exported or time delay are no more than virtual voltage mutual inductor summation current transformer sampling deviation or time delay.
Preferably, described sampling unit adopts dual micro processor pattern, and the exchanges data between dual micro processor is realized by dual port RAM, is respectively used to the collection of 64 tunnel telemetries and calculating and the message exchange with RTU main frame; Dual micro processor respectively selects two panels 12 A/D converters, carries out the A/D sampling of voltage and current respectively;
Described detecting unit is made up of the many groups sample holding unit T/H, the multicircuit switch MUX that connect successively and band output latch A/D analog to digital converter;
Described synchronism output unit adopts the A/D converter of multi-channel synchronal sampling/maintenance, 14 bit parallels, 1 ~ 4 in 8 simulating signals can be carried out synchronized sampling/maintenance, be converted to digital quantity respectively;
Described disturbance generating unit adopts current mode electrical energy power quality disturbance generator, and current mode electrical energy power quality disturbance generator, by the low frequency loop using back-to-back H bridge model block to form radio circuit and cascade, completes the function that current quality disturbance occurs jointly.
Preferably, when described detecting unit carries out phase-locked process, adopt synchronous soft phase-lock mode, adopt fictitious rotor method to process three-phase synchronous voltage and current signal, obtain the synchronous point of sampled signal pulse and the frequency of synchronizing signal.
Preferably, described disturbance generating unit is by loading the standard disturbing signal preset or the disturbing signal formulated according to field demand, and disturbing signal and the lockin signal of detecting unit carry out going together synchronous, feeding synchronism output unit.
Preferably, sampled signal superposes with simultaneous perturbation signal by described synchronism output unit, verify according to lockin signal simultaneously, after the compensation of delay calculating whole system, voltage and current signal is converted to analog output to tested dynamic reactive compensation device by (this time delay is hardware sampling and computation delay, carries out compensation of delay by predictive PI algorithm).
Preferably, described detector is arranged in the space of the accurate cabinet size of two station symbols, and the cabinet of standard cabinet is of a size of 800*800*2200, is fixed in small electrical tool car and transports, test Different field,
The present invention is based on the method for testing of a kind of movable detector for dynamic reactive power compensation that another object provides, its improvements are, described method comprises the steps:
(1) sampling unit gathers the access point of dynamic reactive compensation device and examines point voltage and current signal, and the voltage and current signal of analog quantity is converted to digital signal, digital signal is transferred in detecting unit and synchronism output unit respectively;
(2) detecting unit detects the voltage and current signal gathered, and carries out phase-locked process to gathered signal, and is sent to by lockin signal in disturbance generating unit and synchronism output unit;
(3) disturbance needed for the performance test of disturbance generating unit generation dynamic reactive compensation device, harmonic wave and voltage fluctuation signal, be loaded in the sampled signal of system voltage and electric current by the disturbance of generation, harmonic wave and voltage fluctuation signal in synchronous or asynchronous mode simultaneously;
(4) synchronism output unit carries out phase-locking adjustment to the electric current and voltage sampled signal after loading disturbance, and the deviation of signal that dynamic reactive compensation device is finally exported or time delay are no more than virtual voltage mutual inductor summation current transformer sampling deviation or time delay.
Preferably, in described step (2), when detecting unit carries out phase-locked process, adopt synchronous soft phase-lock mode, adopt fictitious rotor method to process three-phase synchronous voltage and current signal, obtain the synchronous point of pulse and the frequency of synchronizing signal.
Preferably, described fictitious rotor method refers to: line voltage u
gab, u
gbc, u
gcaq axle component u is converted to obtain through park
gq; If line voltage contains negative sequence component and harmonic components, then q axle component contains frequency multiplication ripple and higher hamonic wave;
It is radian that described flexible phase-locked loop SPLL exports phase angular unit, and when phase angle reaches 2 π, integrator resets and restarts integration.
Preferably, in described step (3), described disturbance generating unit is by loading the standard disturbing signal preset or the disturbing signal formulated according to field demand, and disturbing signal and the lockin signal of detecting unit carry out going together synchronous, feeding synchronism output unit.
Preferably, in described step (4), sampled signal superposes with simultaneous perturbation signal by described synchronism output unit, verify according to lockin signal simultaneously, after the compensation of delay calculating whole system, voltage and current signal is converted to analog output to tested dynamic reactive compensation device by (this time delay is hardware sampling and computation delay, carries out compensation of delay by predictive PI algorithm).
Compared with the prior art, the beneficial effect that the present invention reaches is:
1, overcome can the shortcoming of a disturbance testing and emulation simulation test for movable detector for dynamic reactive power compensation, comprehensively can test under system accidental conditions to dynamic reactive compensation device complete machine simultaneously.
2, movable detector for dynamic reactive power compensation with the secondary side voltage of disturbance voltage current transformer for target, place capacity is little, compact conformation, equipment set can be arranged in the space of the accurate cabinet size of two station symbols, be fixed in small electrical tool car and transport, Different field is tested, realizes the packaged type test function of equipment.
3, system disturbance phenomenon can realize arbitrarily in detector; First and second part of dynamic reactive compensation device can be detected simultaneously; Test process without impact, does not need wind energy turbine set or electrical network to change the method for operation to system; Testing apparatus connecting system is simple, is easy to operation; Detection speed is fast; Low compared to other mode equipment manufacturing cost, single testing cost is low.
4, detector for dynamic reactive power compensation volume compact, can make movable type, convenient transport.
Accompanying drawing explanation
Fig. 1 is movable detector for dynamic reactive power compensation schematic diagram provided by the invention;
Fig. 2 is soft phase-locked loop polar plot provided by the invention;
Fig. 3 is soft phase-locked loop control block diagram provided by the invention;
Fig. 4 is detector for dynamic reactive power compensation method of testing schematic diagram provided by the invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Movable detector for dynamic reactive power compensation provided by the invention is made up of multiple processing unit, by sampling to PT/CT secondary side electric current and voltage, simultaneously by simultaneous perturbation signal loading in sampled signal, final generate needed for disturbing signal.Detector for dynamic reactive power compensation principle as shown in Figure 1.Detector is connected with dynamic reactive compensation device, detector comprises sampling unit, detecting unit, synchronism output unit and disturbance generating unit, sampling unit is connected with detecting unit and synchronism output unit respectively, and disturbance generating unit is connected with detecting unit and synchronism output unit respectively; Described detector detects primary side and the secondary side of dynamic reactive compensation device simultaneously.
Sampling unit is responsible for the access point of dynamic reactive compensation device and the sampling processing of examination point voltage and current signal, and analog signals is converted to digital signal and processes by sampling unit fast, digital quantity signal is sent into synchronism output unit simultaneously.
Detecting unit is responsible for the signal detecting the electric current and voltage gathered, and carries out phase-locked process to signal collected.Detecting unit has strict demand to the synchronizing signal produced, and dynamic reactive compensation device can be caused during sampled signal inaccurate serious to control unstability.Detecting unit requires that the tracking lock time is short as much as possible, and response speed is fast as much as possible.Genlock adopts fictitious rotor method, and process three-phase synchronous voltage and current signal, obtain the synchronous point of pulse and the frequency of synchronizing signal, the advantage of adopting in this way to measure the frequency of synchronizing signal in real time.As shown in Figure 2, specific implementation block diagram as shown in Figure 3 for soft phase-locked principle.Line voltage u
gab, u
gbc, u
gcaq axle component u is converted to obtain through park
gq.If line voltage contains negative sequence component and harmonic components, then q axle component contains frequency multiplication ripple and higher hamonic wave.Under the occasion that phase-locked requirement is not too high, often omit special filtering link.It is radian that SPLL exports phase angular unit, and when phase angle reaches 2 π, integrator resets and restarts integration.In order to prevent phase angle from shaking when integrator resets, the moment t of 2 π must be reached by accurate Calculation phase angle
2 π, and integrator is at t
2 πmoment resets.The lockin signal that detecting unit produces sends into disturbance generating unit and synchronism output unit.
Disturbance generating unit is responsible for producing the signal such as disturbance, harmonic wave, voltage fluctuation needed for dynamic reactive compensation device performance test, is loaded in the sampled signal of system voltage and electric current by the signal of generation in synchronous or asynchronous mode simultaneously.Disturbance generating unit is by the disturbing signal loading default standard disturbing signal or formulate according to field demand, and disturbing signal and detecting unit lockin signal carry out going together synchronous, feeding synchronism output unit.
Synchronism output unit is responsible for the electric current and voltage sampled signal after to loading disturbance and is carried out phase-locking adjustment, and the deviation of signal (time delay) that device is finally exported is no more than virtual voltage and current transformer sampling deviation (time delay).The one-piece construction of packaged type dynamic passive compensation pick-up unit ensure that pick-up unit is to the synchronism of fault simulation and electrical network and accuracy.Sampled signal superposes with simultaneous perturbation signal by synchronism output unit, verifies according to lockin signal simultaneously, final voltage and current signal is converted to analog output after the compensation of delay calculating whole system to tested dynamic reactive compensation device.
Described sampling unit adopts dual micro processor (CPU) pattern, and dual micro processor is relatively independent, and the exchanges data between dual micro processor is realized by dual port RAM, is respectively used to the high speed acquisition of 64 tunnel telemetries and calculating and the message exchange with RTU main frame; For ensureing sampling accuracy, dual micro processor respectively selects two panels 12 high-speed a/d converters, adopts the A/D of voltage and current to sample (signal enters A/D after the process such as voltage follow, sampling keep) respectively.
Described detecting unit adopts organizes sample holding unit (T/H), multicircuit switch (MUX) and band output latch analog to digital converter (A/D) composition more.
Described synchronism output unit adopts high speed, multi-channel synchronal sampling/maintenance, 14 bit parallel A/D converters, 1 ~ 4 in 8 simulating signals can be carried out synchronized sampling/maintenance, be converted to digital quantity respectively.With it and single-chip microcomputer can built-up circuit structure simple, slewing rate is fast, precision is high, high-speed synchronous data acquiring system, realize gathering while 1 ~ 4 analog quantity.
Disturbance generating unit adopts current mode electrical energy power quality disturbance generator, by the low frequency loop using back-to-back H bridge model block to form radio circuit and cascade, jointly complete the function that current quality disturbance occurs, the various perturbed problems that can occur in effective high-precision analog electrical Force system: the problems etc. such as harmonic current generation, current fluctuation, load unbalanced, power factor.Packaged type dynamic reactive compensation device adopts DSP, FPGA and CPLD unit, together constitutes the control core of device.
Movable detector for dynamic reactive power compensation with the secondary side voltage of disturbance voltage current transformer for target, place capacity is little, compact conformation, equipment set can be arranged in the space of the accurate cabinet size of two station symbols, be fixed in small electrical tool car and transport, Different field is tested, realizes the packaged type test function of equipment.
The present invention also provides a kind of method of testing of movable detector for dynamic reactive power compensation, and its schematic diagram as shown in Figure 4, comprises the steps:
(1) sampling unit gathers the access point of dynamic reactive compensation device and examines point voltage and current signal, and the voltage and current signal of analog quantity is converted to digital signal, digital signal is transferred in detecting unit and synchronism output unit respectively;
(2) detecting unit detects the voltage and current signal gathered, and carries out phase-locked process to gathered signal, and is sent to by lockin signal in disturbance generating unit and synchronism output unit; Detecting unit adopts synchronous soft phase-lock mode when carrying out phase-locked process, adopt fictitious rotor method to process three-phase synchronous voltage and current signal, obtain the synchronous point of pulse and the frequency of synchronizing signal.
(3) disturbance needed for the performance test of disturbance generating unit generation dynamic reactive compensation device, harmonic wave and voltage fluctuation signal, be loaded in the sampled signal of system voltage and electric current by the disturbance of generation, harmonic wave and voltage fluctuation signal in synchronous or asynchronous mode simultaneously; Disturbance generating unit is by loading the standard disturbing signal preset or the disturbing signal formulated according to field demand, and disturbing signal and the lockin signal of detecting unit carry out going together synchronous, feeding synchronism output unit.
(4) synchronism output unit carries out phase-locking adjustment to the electric current and voltage sampled signal after loading disturbance, and the deviation of signal that dynamic reactive compensation device is finally exported or time delay are no more than virtual voltage mutual inductor summation current transformer sampling deviation or time delay; Sampled signal superposes with simultaneous perturbation signal by synchronism output unit, verifies according to lockin signal simultaneously, voltage and current signal is converted to analog output after the compensation of delay calculating whole system to tested dynamic reactive compensation device.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although with reference to above-described embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or equivalent replacement, and not departing from any amendment of spirit and scope of the invention or equivalent replacement, it all should be encompassed in the middle of right of the present invention.
Claims (11)
1. a movable detector for dynamic reactive power compensation, described detector is connected with dynamic reactive compensation device, it is characterized in that, described detector comprises sampling unit, detecting unit, synchronism output unit and disturbance generating unit, described sampling unit is connected with detecting unit and synchronism output unit respectively, and described disturbance generating unit is connected with detecting unit and synchronism output unit respectively; Described detector detects primary side and the secondary side of dynamic reactive compensation device simultaneously;
The voltage and current signal of analog quantity for gathering the access point of dynamic reactive compensation device and examining point voltage and current signal, and is converted to digital signal by described sampling unit, digital signal is transferred in detecting unit and synchronism output unit respectively;
Described detecting unit, for detecting gathered voltage and current signal, carries out phase-locked process to gathered signal, and is sent to by lockin signal in disturbance generating unit and synchronism output unit;
The disturbance of generation, harmonic wave and voltage fluctuation signal, for generation of the disturbance needed for dynamic reactive compensation device performance test, harmonic wave and voltage fluctuation signal, are loaded in the sampled signal of system voltage and electric current in synchronous or asynchronous mode by described disturbance generating unit simultaneously;
Described synchronism output unit is used for the electric current and voltage sampled signal after to loading disturbance and carries out phase-locking adjustment, and the deviation of signal that dynamic reactive compensation device is finally exported or time delay are no more than virtual voltage mutual inductor summation current transformer sampling deviation or time delay.
2. detector as claimed in claim 1, it is characterized in that, described sampling unit adopts dual micro processor pattern, and the exchanges data between dual micro processor is realized by dual port RAM, is respectively used to the collection of 64 tunnel telemetries and calculating and the message exchange with RTU main frame; Dual micro processor respectively selects two panels 12 A/D converters, carries out the A/D sampling of voltage and current respectively;
Described detecting unit is made up of the many groups sample holding unit T/H, the multicircuit switch MUX that connect successively and band output latch A/D analog to digital converter;
Described synchronism output unit adopts the A/D converter of multi-channel synchronal sampling/maintenance, 14 bit parallels, 1 ~ 4 in 8 simulating signals can be carried out synchronized sampling/maintenance, be converted to digital quantity respectively;
Described disturbance generating unit adopts current mode electrical energy power quality disturbance generator, and current mode electrical energy power quality disturbance generator, by the low frequency loop using back-to-back H bridge model block to form radio circuit and cascade, completes the function that current quality disturbance occurs jointly.
3. detector as claimed in claim 1 or 2, it is characterized in that, described detecting unit adopts synchronous soft phase-lock mode when carrying out phase-locked process, adopt fictitious rotor method to process three-phase synchronous voltage and current signal, obtain the synchronous point of sampled signal pulse and the frequency of synchronizing signal.
4. detector as claimed in claim 1 or 2, it is characterized in that, described disturbance generating unit is by loading the standard disturbing signal preset or the disturbing signal formulated according to field demand, and disturbing signal and the lockin signal of detecting unit carry out going together synchronous, feeding synchronism output unit.
5. detector as claimed in claim 1 or 2, it is characterized in that, sampled signal superposes with simultaneous perturbation signal by described synchronism output unit, verify according to lockin signal simultaneously, voltage and current signal is converted to analog output after the compensation of delay calculating whole system to tested dynamic reactive compensation device.
6. detector as claimed in claim 1 or 2, it is characterized in that, described detector is arranged in the space of the accurate cabinet size of two station symbols, and the cabinet of standard cabinet is of a size of 800*800*2200, be fixed in small electrical tool car and transport, Different field is tested.
7. a method of testing for movable detector for dynamic reactive power compensation, is characterized in that, described method comprises the steps:
(1) sampling unit gathers the access point of dynamic reactive compensation device and examines point voltage and current signal, and the voltage and current signal of analog quantity is converted to digital signal, digital signal is transferred in detecting unit and synchronism output unit respectively;
(2) detecting unit detects the voltage and current signal gathered, and carries out phase-locked process to gathered signal, and is sent to by lockin signal in disturbance generating unit and synchronism output unit;
(3) disturbance needed for the performance test of disturbance generating unit generation dynamic reactive compensation device, harmonic wave and voltage fluctuation signal, be loaded in the sampled signal of system voltage and electric current by the disturbance of generation, harmonic wave and voltage fluctuation signal in synchronous or asynchronous mode simultaneously;
(4) synchronism output unit carries out phase-locking adjustment to the electric current and voltage sampled signal after loading disturbance, and the deviation of signal that dynamic reactive compensation device is finally exported or time delay are no more than virtual voltage mutual inductor summation current transformer sampling deviation or time delay.
8. method of testing as claimed in claim 7, it is characterized in that, in described step (2), detecting unit adopts synchronous soft phase-lock mode when carrying out phase-locked process, adopt fictitious rotor method to process three-phase synchronous voltage and current signal, obtain the synchronous point of pulse and the frequency of synchronizing signal.
9. method of testing as claimed in claim 8, it is characterized in that, described fictitious rotor method refers to: line voltage u
gab, u
gbc, u
gcaq axle component u is converted to obtain through park
gq; If line voltage contains negative sequence component and harmonic components, then q axle component contains frequency multiplication ripple and higher hamonic wave;
It is radian that described synchronous soft phase-lock mode exports phase angular unit, and when phase angle reaches 2 π, integrator resets and restarts integration.
10. method of testing as claimed in claim 7, it is characterized in that, in described step (3), described disturbance generating unit is by loading the standard disturbing signal preset or the disturbing signal formulated according to field demand, disturbing signal and the lockin signal of detecting unit carry out going together synchronous, send into synchronism output unit.
11. method of testings as claimed in claim 7, it is characterized in that, in described step (4), sampled signal superposes with simultaneous perturbation signal by described synchronism output unit, verify according to lockin signal simultaneously, voltage and current signal is converted to analog output after the compensation of delay calculating whole system to tested dynamic reactive compensation device.
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| CN104122477A (en) * | 2014-08-08 | 2014-10-29 | 国家电网公司 | Device and method for testing dynamic reactive power compensation device based on virtual instrument technology |
| CN105629045A (en) * | 2014-11-10 | 2016-06-01 | 国家电网公司 | Protection tester based on PCM-FM wireless transmission |
| CN104569702A (en) * | 2015-02-13 | 2015-04-29 | 国家电网公司 | Testing system of unified power quality controller and testing method thereof |
| CN105337318B (en) * | 2015-10-20 | 2019-08-16 | 国家电网公司 | Wind turbines generator operation as synchronous condenser aptitude tests method and system |
| CN108107287B (en) * | 2017-06-07 | 2023-04-25 | 国网山西省电力公司电力科学研究院 | Performance detection device and method based on closed-loop response dynamic reactive power generation device |
| CN107783041A (en) * | 2017-11-27 | 2018-03-09 | 华北电力科学研究院有限责任公司 | The test of transducer drive electric system power supply disturbance tolerance, evaluation method and device |
| CN109038597B (en) * | 2018-08-17 | 2021-09-14 | 青海电研科技有限责任公司 | Voltage fluctuation control method, control device thereof, and computer-readable storage medium |
| CN112269087A (en) * | 2020-10-26 | 2021-01-26 | 国网河北省电力有限公司电力科学研究院 | High-low voltage ride through capability detection system of reactive power compensation device |
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| JP2006271075A (en) * | 2005-03-23 | 2006-10-05 | Fuji Electric Systems Co Ltd | Control system for reactive power compensation device |
| CN101364737A (en) * | 2007-08-08 | 2009-02-11 | 陈劲游 | Method capable of on-line detecting and controlling reactive compensating capacitor and reactive compensating controller thereof |
| CN101533053B (en) * | 2009-04-24 | 2010-12-29 | 东北大学 | Load simulation and detection device of static reactive power compensation testing platform |
| CN102305886B (en) * | 2011-05-31 | 2013-07-24 | 浙江大学 | Fundamental voltage synchronous signal detection method during harmonic distortion and unbalance of network voltage |
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