CN203444095U - Portable synchronous phasor measurement unit (PMU) tester - Google Patents
Portable synchronous phasor measurement unit (PMU) tester Download PDFInfo
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- CN203444095U CN203444095U CN201320502903.0U CN201320502903U CN203444095U CN 203444095 U CN203444095 U CN 203444095U CN 201320502903 U CN201320502903 U CN 201320502903U CN 203444095 U CN203444095 U CN 203444095U
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Abstract
The utility model discloses a portable synchronous phasor measurement unit (PMU) tester. An external GPS receiver is connected with a PPS synchronous clock receiving module which is connected with an FPGA high speed data processing module. The FPGA high speed data processing module is connected with a high speed DAC conversion module and sends output to the high speed DAC conversion module. The high speed DAC conversion module sends output to an AC power output module and a phase pulse output module. The main CPU management module of a DSP is connected with a debugging computer. According to the portable synchronous phasor measurement unit (PMU) tester, a hardware scheme of 'DSP+FPGA+ high speed DAC+AC power module' is employed, a high precision GPS clock synchronous signal processing method is used, the FPGA logic and DSP program design control technology with strict compensation analog delay is employed, and a high precision synchronization phase angle output is ensured.
Description
Technical field
The utility model relates to the pick-up unit of a kind of synchronous phasor measuring device PMU, particularly a kind of Portable synchronous phasor measuring set PMU tester.
Background technology
Research and the application of the WAMS based on synchronous phasor measuring device (Phasor Measurement Unit, PMU) (Wide Area Measurement System, WAMS) are the advanced subject in current power system automation field.At home, for coordinating national power networking, each grid company is installed synchronous phasor measuring device (PMU) in important transformer station and generating plant successively, builds Real-Time Dynamic Monitoring System of Power system, and realizes the monitoring of dynamic process of electrical power system and analysis by dispatching center main website.At present to the method for inspection of PMU adopt high-precision AC test source, gps clock, high-speed oscilloscope or oscillograph to catch to record the voltage, current waveform of a period of time, on this basis by analytical calculation signal carve at a time phase angle, with the comparison of PMU data, evaluate the measuring error of PMU.This method is only applicable to laboratory study or sampling observation, and because traditional calibration equipment etc. can not provide Dynamic Phasors information, the amplitude information of Power System Steady-state can only be provided, and the field performance test of PMU only can be checked its amplitude precision, and of paramount importance parameter-phase angle but cannot be checked.To sum up, due to the constraint of routine inspection instrument and means, dynamic property and the most steady-state behaviour of PMU at the scene all cannot being checked, there is dead band in check work, has directly affected the correctness of WAMS monitoring and early warning analysis function.Therefore, urgently develop the portable PMU tester that is applicable to field test and solve the problems referred to above.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art part, and provide a kind of domestic PMU device scene that can solve to detect, the Portable synchronous phasor measuring set PMU tester of the reliability service of the also field test of standard PMU simultaneously, assurance PMU system.
A kind of Portable synchronous phasor measuring set PMU tester, include the host CPU administration module of DSP, FPGA high-speed data processing module, high-speed DAC modular converter, PPS synchronous clock receiver module, external GPS receiving equipment, phase pulse output module, AC power output module and power module, described external GPS receiving equipment is connected with PPS synchronous clock receiver module, PPS synchronous clock receiver module is connected with FPGA high-speed data processing module, FPGA high-speed data processing module is connected and exports to high-speed DAC modular converter, high-speed DAC modular converter outputs to AC power output module and phase pulse output module, the host CPU administration module of described DSP is connected with debugging computer.
Portable synchronous phasor measuring set PMU tester DSP host CPU administration module of the present utility model is as the Total Management Module of PMU tester, be responsible for receiving the test execution scheme of PMU testing software, carry out control algolithm master routine, control the output of inner modules etc.FPGA high-speed data processing module is mainly used in the accurate control exchanging and the pulse of key phase is exported, and receives the modulation of DSP to the amplitude of alternating voltage electric current, phase place, frequency.PPS synchronous clock receiver module is less than 0.05 degree (2.77 microsecond) of standard-required in order to make to export phase angle and absolute time error, require: gps signal receiver module time error ± 100ns, local time reference temperature are floated be less than ± 1.5ppm, high-speed DDS frequency synthesis 1MHz.AI AC power output module requirement degree of stability is high, the output response time short (10us level); Require high conformity, the output response time is controlled by component parameters; Require reproduciblely, export the corresponding time can be compensated by the time delay pre-control compensation logic in system diagram, thereby reach output phase angle, there is absolute time mark.
Described Portable synchronous phasor measuring set PMU tester also includes DI and opens into module and DO and output module, and described DI opens and into module, outputs module with DO and be connected with the host CPU administration module of DSP by internal bus.
In sum, the utility model following advantage compared to existing technology:
Portable synchronous phasor measuring set PMU tester of the present utility model adopts the hardware plan of " DSP+FPGA+ high-speed DAC+AC power module ", utilize high-precision gps clock synchronizing signal disposal route, adopt fpga logic, the DSP program design control technology of strict compensating analog time delay, guaranteed that high-precise synchronization phase angle output, the domestic output that has realized first electric current and voltage take the phase place accuracy error that GPS absolute time signal is benchmark and be less than 0.05 °; The output of key phase pulse be take the phase place accuracy error that GPS absolute time signal is benchmark and is less than 0.05 °.
(2)the DSP program that adopts DA output real time algorithm, realizes the output of various PMU dynamic measuring signals, comprising: AC signal amplitude, frequency, phase angle step change, simulate the AC signal modulation of low-frequency oscillation etc.
1) alternating voltage amplitude step mutational range: rated voltage ± 10%, ± 20%, ± 50%, the transitional processes time is less than 200us.
2) alternating voltage phase angle step mutational range: ± 15 °, ± 45 °, ± 90 °, the transitional processes time is less than 200us.
3) alternating current voltage frequency step mutational range: ± 0.01Hz scale is adjustable, the transitional processes time is less than 200us.
4) alternating voltage which amplitude modulation amount 10%; Modulating frequency 0.1 ~ 4.5Hz, be simultaneously less than ± 0.001Hz of frequency accuracy.
5) ac power frequency modulation voltage 0.5Hz, modulation period 0.5s ~ 10s, simultaneously amplitude accuracy error be less than ± 0.05%.
(3)adopt high-precision AC power model, tester can provide 3 cross streams electric currents, 3 cross streams voltage high precision outputs:
1) alternating voltage range 0～100V, output area 0～120%, accuracy error is less than ± and 0.05%, harmonic distortion rate THD is less than 0.05%.
2) alternating voltage range 0～5A, output area 0～120%, accuracy error is less than ± and 0.05%, harmonic distortion rate THD is less than 0.05%.
3) frequency is adjustable between 45 Hz～55 Hz, be less than ± 0.001Hz of frequency accuracy error.
4) can export 2～13 subharmonic, harmonic signal scope is 0～20%, harmonic component accuracy is less than ± and 0.2%.
5) active power and reactive power accuracy error be less than ± 0.1%, degree of stability is less than 0.01%/1min, single alternating-current voltage source peak power output 20VA/ phase.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of Portable synchronous phasor measuring set PMU tester of the present utility model.
Embodiment
Below in conjunction with embodiment, the utility model is described in more detail.
Embodiment 1
A kind of Portable synchronous phasor measuring set PMU tester as shown in Figure 1, include the host CPU administration module of DSP, FPGA high-speed data processing module, high-speed DAC modular converter, PPS synchronous clock receiver module, external GPS receiving equipment, phase pulse output module, AC power output module and power module, described external GPS receiving equipment is connected with PPS synchronous clock receiver module, PPS synchronous clock receiver module is connected with FPGA high-speed data processing module, FPGA high-speed data processing module is connected and exports to high-speed DAC modular converter, high-speed DAC modular converter outputs to AC power output module and phase pulse output module, the host CPU administration module of described DSP is connected with debugging computer.Described Portable synchronous phasor measuring set PMU tester also includes DI and opens into module and DO and output module, and described DI opens and into module, outputs module with DO and be connected with the host CPU administration module of DSP by internal bus.
It is same as the prior art that the present embodiment is not stated part.
Claims (2)
1. a Portable synchronous phasor measuring set PMU tester, it is characterized in that: the host CPU administration module that includes DSP, FPGA high-speed data processing module, high-speed DAC modular converter, PPS synchronous clock receiver module, external GPS receiving equipment, phase pulse output module, AC power output module and power module, described external GPS receiving equipment is connected with PPS synchronous clock receiver module, PPS synchronous clock receiver module is connected with FPGA high-speed data processing module, FPGA high-speed data processing module is connected and exports to high-speed DAC modular converter, high-speed DAC modular converter outputs to AC power output module and phase pulse output module, the host CPU administration module of described DSP is connected with debugging computer.
2. Portable synchronous phasor measuring set PMU tester according to claim 1, it is characterized in that: described Portable synchronous phasor measuring set PMU tester also includes DI and opens into module and DO and output module, described DI opens and into module, outputs module with DO and be connected with the host CPU administration module of DSP by internal bus.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320502903.0U CN203444095U (en) | 2013-08-16 | 2013-08-16 | Portable synchronous phasor measurement unit (PMU) tester |
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| CN201320502903.0U CN203444095U (en) | 2013-08-16 | 2013-08-16 | Portable synchronous phasor measurement unit (PMU) tester |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111999690A (en) * | 2020-08-25 | 2020-11-27 | 中电普瑞电力工程有限公司 | Batch factory detection system and method for adaptive PMU device |
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2013
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111999690A (en) * | 2020-08-25 | 2020-11-27 | 中电普瑞电力工程有限公司 | Batch factory detection system and method for adaptive PMU device |
| CN111999690B (en) * | 2020-08-25 | 2023-08-22 | 中电普瑞电力工程有限公司 | Batch delivery detection system and method for self-adaptive PMU devices |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140219 Termination date: 20180816 |