CN103091541A - Intelligent substation secondary transient voltage measuring device and measuring method - Google Patents
Intelligent substation secondary transient voltage measuring device and measuring method Download PDFInfo
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- CN103091541A CN103091541A CN2012105458426A CN201210545842A CN103091541A CN 103091541 A CN103091541 A CN 103091541A CN 2012105458426 A CN2012105458426 A CN 2012105458426A CN 201210545842 A CN201210545842 A CN 201210545842A CN 103091541 A CN103091541 A CN 103091541A
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Abstract
The invention discloses an intelligent substation secondary transient voltage measuring device and measuring method which is characterized by comprising a voltage transformer, a voltage measuring probe, an oscilloscope, a fiber optical transceiver and a computer, wherein a secondary coil of the voltage transformer is connected with the oscilloscope through voltage measurement, and the oscilloscope is connected with the computer through the fiber optical transceiver. The intelligent substation secondary transient voltage measuring device can accurately measure and visually display the secondary transient voltage of the intelligent substation due to the voltage transformer, the voltage measuring probe, the oscilloscope, the fiber optical transceiver and the computer, and can ensure safe and reliable operation of the substation.
Description
Technical field
The present invention relates to high voltage power transmission and transforming engineering electromagnetic compatibility technology field, refer to particularly a kind of intelligent substation secondary transient voltage measurement mechanism and measuring method.
Technical background
The final goal of intelligent substation is to make intelligent assembly and high-tension apparatus form integrated layout, realizes the optimized network control structure of " a two-layer net "; So just make and be arranged in a large number the intelligent assembly (protection, control, measurement, metering and Condition Monitoring Unit) of protection in cell and move forward in the high-voltage switch gear field; can these be worked under the extremely abominable electromagnetic environment of switch yard by the intelligent assembly that microelectronic component forms, and caused Operation of Electric Systems department and device fabrication business's extensive concern.For this reason in the urgent need to being connected to the transient state disturbance voltage on secondary device in the measuring switch field, grasp the characterisitic parameters such as substation secondary transient state disturbance voltage amplitude, frequency and waveform, in order to formulate accordingly the transient voltage immunity standard of secondary equipment of intelligent converting station, guarantee the substation safety reliability service.High due to substation secondary transient voltage frequency, amplitude is high, is difficult to accurate measurement, also there is no the substation secondary transient voltage measurement mechanism of science, standard at present.
Summary of the invention
Purpose of the present invention will provide a kind of intelligent substation secondary transient voltage measurement mechanism and measuring method exactly, and these apparatus and method can the interior secondary transient voltage of Measurement accuracy intelligent substation.
For realizing this purpose, the intelligent substation secondary transient voltage measurement mechanism that the present invention is designed, it is characterized in that: it comprises voltage transformer (VT), voltage measurement probe, oscillograph, fiber optical transceiver and computer, wherein, the primary winding of described voltage transformer (VT) connects high-tension line, the secondary coil of voltage transformer (VT) is popped one's head in by voltage measurement and is connected oscillograph, and described oscillograph connects computer by fiber optical transceiver.
In technique scheme, it also comprises the first shielded box and secondary shielding case, and described voltage measurement probe is positioned at the first shielded box, and oscillograph is positioned at the secondary shielding case.
Connect by cable between described voltage measurement probe and oscillograph, also be connected by cable between the secondary coil of described voltage measurement probe and voltage transformer (VT).
Be connected by optical fiber between described oscillograph and fiber optical transceiver.
The bandwidth of described voltage measurement probe is 50MHz, and the voltage measurement scope of voltage measurement probe is at 0 ~ 30kV.
Described oscillographic bandwidth is 500MHz, and oscillographic storage depth is 125MB.
The shield effectiveness of described the first shielded box and secondary shielding case is more than 50dB.
A kind of substation secondary transient voltage measuring method of utilizing above-mentioned intelligent substation secondary transient voltage measurement mechanism is characterized in that it comprises the steps:
Step 1: produce the transient state disturbance voltage in the secondary coil of voltage transformer side when the transformer substation switch switching;
Step 2: the voltage measurement probe is sensed the secondary transient state disturbance voltage signal of secondary coil of voltage transformer;
Step 3: computer sends instruction to oscillograph, controls the secondary transient state disturbance voltage signal that oscillograph receiver voltage measuring sonde is sensed;
Step 4: described oscillograph characterizes out the waveform of secondary transient state disturbance voltage signal, and this waveform signal is transferred to computer by fiber optical transceiver;
Step 5: computer docking is received to such an extent that waveform signal is analyzed, and draws the characterisitic parameter of secondary transient state disturbance voltage waveform, amplitude and frequency.
Connect by cable between described voltage measurement probe and oscillograph, also be connected by cable between the secondary coil of described voltage measurement probe and voltage transformer (VT), described cable all is enclosed with masking foil.
Cable length scope between described voltage measurement probe and oscillograph is 0.5 ~ 2m, cable length between the secondary coil of described voltage measurement probe and voltage transformer (VT) is 0.5 ~ 1m, connect by optical fiber between described fiber optical transceiver and oscillograph, the distance that connects optical fiber between described fiber optical transceiver and oscillograph is 150 ~ 250m.
The present invention is by arranging voltage transformer (VT), voltage measurement probe, oscillograph, fiber optical transceiver and computer, make the secondary transient voltage in this device energy Measurement accuracy intelligent substation, and carry out visualization display, for the transient voltage immunity standard of formulating secondary equipment of intelligent converting station provides reference data.In addition, use the present invention can guarantee the substation safety reliability service.
Description of drawings
Fig. 1 is structured flowchart of the present invention;
Fig. 2 is the time domain waveform of oscilloscope measurement in the present invention;
Fig. 3 is that in the present invention, computer docking is received to get the waveform that obtains after analyzing of waveform signal;
Wherein, 1-voltage transformer (VT), 2-voltage measurement probe, 3-oscillograph, 4-fiber optical transceiver, 5-computer, the 6-the first shielded box, 7-secondary shielding case.
Embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments:
Intelligent substation secondary transient voltage measurement mechanism in figure shown in 1, it comprises voltage transformer (VT) 1, voltage measurement probe 2, oscillograph 3, fiber optical transceiver 4 and computer 5, wherein, the primary winding of voltage transformer (VT) 1 connects high-tension line, the secondary coil of voltage transformer (VT) 1 is popped one's head in by voltage measurement and 2 is connected oscillographs 3, and oscillograph 3 connects computers 5 by fiber optical transceiver 4.
In technique scheme, it also comprises the first shielded box 6 and secondary shielding case 7, and voltage measurement probe 2 is positioned at the first shielded box 6, and oscillograph 3 is positioned at secondary shielding case 7.
In technique scheme, connects by cable between voltage measurement probe 2 and oscillograph 3, voltage measurement pop one's head in 2 with the secondary coil of voltage transformer (VT) 1 between also be connected by cable.
In technique scheme, be connected by optical fiber between oscillograph 3 and fiber optical transceiver 4.Above-mentioned fiber optical transceiver 4 is selected HTB-1100S 25KM single-mode fiber transceiver, and light signal is converted to the netting twine signal, and computer 5 is connected with oscillograph 3.
In technique scheme, the bandwidth of voltage measurement probe 2 is 50MHz, and the voltage measurement scope of voltage measurement probe 2 is at 0 ~ 30kV.Above-mentioned voltage measurement probe 2 is selected Tyke P6015A high-voltage probe, its bandwidth 75MHz, attenuation ratio 1000X, load 100M Ω/3pF.Utilize the stube cable of probe itself to be connected with measured piece, guarantee that stube cable is short as far as possible, generally be no more than 1m, and with masking foil, stube cable wrapped up, simultaneously voltage measurement probe 2 is placed in the first shielded box 6, the first shielded box 6 volumes are advisable just to hold measuring sonde.
In technique scheme, the bandwidth of oscillograph 3 is 500MHz, and the storage depth of oscillograph 3 is 125MB.Above-mentioned oscillograph 3 is selected Yokogawa 2104 types, its bandwidth 500MHz, sampling rate 2.5GS/s, storage depth 125MB.Utilize two ends for the stube cable of BNC type joint, voltage measurement probe 2 to be connected with oscillograph 3, stube cable is short as far as possible, generally is no more than 1m.And with masking foil, stube cable is wrapped up, simultaneously oscillograph 3 is placed in secondary shielding case 7, oscillograph 3 adopts accumulator to add the method for supplying power to of inverter, accumulator and inverter also are placed in secondary shielding case 7, and the volume of secondary shielding case 7 is advisable just to hold oscillograph 3, accumulator and inverter.Also voltage measurement can be popped one's head in 2, oscillograph, accumulator and inverter be placed in a volume adequate shielding case, connected mode is constant.
In technique scheme, the shield effectiveness of the first shielded box 6 and secondary shielding case 7 is more than 50dB.
When the present invention installed: voltage measurement probe 2 and oscillograph 3 were arranged in the shielded box of measure field, and fiber optical transceiver 4 and computer 5 are placed on the measurement zone in a distant place.
A kind of intelligent substation secondary transient voltage measuring method, it comprises the steps:
Step 1: produce the transient state disturbance voltage in voltage transformer (VT) 1 secondary coil side when the transformer substation switch switching;
Step 2: voltage measurement probe 2 is sensed the secondary transient state disturbance voltage signal of voltage transformer (VT) 1 secondary coil;
Step 3: computer 5 sends instruction to oscillograph 3, controls the secondary transient state disturbance voltage signal that oscillograph 3 receiver voltage measuring sondes 2 are sensed;
Step 4: oscillograph 3 characterizes out the waveform (as shown in Figure 2) of secondary transient state disturbance voltage signal, and this waveform signal is transferred to computer 5 by fiber optical transceiver 4;
Step 5: 5 pairs, computer receives to such an extent that waveform signal is analyzed, and draws the characterisitic parameter (as shown in Figure 3) of secondary transient state disturbance voltage waveform, amplitude and frequency.
In technique scheme, connects by cable between voltage measurement probe 2 and oscillograph 3, voltage measurement pop one's head in 2 with the secondary coil of voltage transformer (VT) 1 between also be connected by cable, cable all is enclosed with masking foil.Masking foil can guarantee the closure of above-mentioned electrical connection.
In technique scheme, cable length scope between voltage measurement probe 2 and oscillograph 3 is 0.5 ~ 2m, cable length between the secondary coil of voltage measurement probe 2 and voltage transformer (VT) 1 is 0.5 ~ 1m, connect by optical fiber between fiber optical transceiver 4 and oscillograph 3, the distance that connects optical fiber between described fiber optical transceiver 4 and oscillograph 3 is 150 ~ 250m.
When the present invention works: produce the transient state disturbance voltage in voltage transformer (VT) 1 secondary coil side when the transformer substation switch switching, the secondary transient state disturbance voltage signal of voltage measurement probe 2 induced voltage mutual inductor 1 secondary coils, this signal is sent to oscillograph 3, oscillograph 3 characterizes out the waveform of secondary transient state disturbance voltage signal, this waveform signal sends computer 5 to by fiber optical transceiver 4 and shows, formulates the transient voltage immunity standard of secondary equipment of intelligent converting station for the technician.
The content that this instructions is not described in detail belongs to the known prior art of this area professional and technical personnel.
Claims (10)
1. intelligent substation secondary transient voltage measurement mechanism, it is characterized in that: it comprises voltage transformer (VT) (1), voltage measurement probe (2), oscillograph (3), fiber optical transceiver (4) and computer (5), wherein, the primary winding of described voltage transformer (VT) (1) connects high-tension line, the secondary coil of voltage transformer (VT) (1) by voltage measurement pop one's head in (2) connect oscillograph (3), described oscillograph (3) connects computer (5) by fiber optical transceiver (4).
2. intelligent substation secondary transient voltage measurement mechanism according to claim 1, it is characterized in that: it also comprises the first shielded box (6) and secondary shielding case (7), described voltage measurement probe (2) is positioned at the first shielded box (6), and oscillograph (3) is positioned at secondary shielding case (7).
3. intelligent substation secondary transient voltage measurement mechanism according to claim 1, it is characterized in that: connect by cable between described voltage measurement probe (2) and oscillograph (3), described voltage measurement is popped one's head in and also is connected by cable between the secondary coil of (2) and voltage transformer (VT) (1).
4. intelligent substation secondary transient voltage measurement mechanism according to claim 1 is characterized in that: be connected by optical fiber between described oscillograph (3) and fiber optical transceiver (4).
5. intelligent substation secondary transient voltage measurement mechanism according to claim 1 is characterized in that: the bandwidth of described voltage measurement probe (2) is 50MHz, and the voltage measurement scope of voltage measurement probe (2) is at 0 ~ 30kV.
6. intelligent substation secondary transient voltage measurement mechanism according to claim 1, it is characterized in that: the bandwidth of described oscillograph (3) is 500MHz, the storage depth of oscillograph (3) is 125MB.
7. intelligent substation secondary transient voltage measurement mechanism according to claim 2, it is characterized in that: the shield effectiveness of described the first shielded box (6) and secondary shielding case (7) is more than 50dB.
8. a substation secondary transient voltage measuring method of utilizing the described intelligent substation secondary of claim 1 transient voltage measurement mechanism, is characterized in that, it comprises the steps:
Step 1: produce the transient state disturbance voltage in voltage transformer (VT) (1) secondary coil side when the transformer substation switch switching;
Step 2: voltage measurement probe (2) is sensed the secondary transient state disturbance voltage signal of voltage transformer (VT) (1) secondary coil;
Step 3: computer (5) sends instruction to oscillograph (3), controls the secondary transient state disturbance voltage signal that oscillograph (3) receiver voltage measuring sonde (2) is sensed;
Step 4: described oscillograph (3) characterizes out the waveform of secondary transient state disturbance voltage signal, and this waveform signal is transferred to computer (5) by fiber optical transceiver (4);
Step 5: computer (5) draws the characterisitic parameter of secondary transient state disturbance voltage waveform, amplitude and frequency to receiving to such an extent that waveform signal is analyzed.
9. intelligent substation secondary transient voltage measuring method according to claim 8, it is characterized in that: connect by cable between described voltage measurement probe (2) and oscillograph (3), also be connected by cable between the secondary coil of described voltage measurement probe (2) and voltage transformer (VT) (1), described cable all is enclosed with masking foil.
10. intelligent substation secondary transient voltage measuring method according to claim 9, it is characterized in that: the cable length scope between described voltage measurement probe (2) and oscillograph (3) is 0.5 ~ 2m, cable length between the secondary coil of described voltage measurement probe (2) and voltage transformer (VT) (1) is 0.5 ~ 1m, connect by optical fiber between described fiber optical transceiver (4) and oscillograph (3), the distance that connects optical fiber between described fiber optical transceiver (4) and oscillograph (3) is 150 ~ 250m.
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| CN106249074A (en) * | 2016-07-21 | 2016-12-21 | 国家电网公司 | Real time on-line monitoring device to intelligent substation assembly electromagnetic interference |
| CN104267252B (en) * | 2014-10-13 | 2017-07-04 | 西安交通大学 | A kind of decoupling method of use capacitance sensor measuring transformer coil transient voltage |
| CN109991468A (en) * | 2019-03-21 | 2019-07-09 | 中国电力科学研究院有限公司 | A kind of method and device for testing ultra-high voltage transformer station electrical secondary system disturbance voltage |
| CN111521885A (en) * | 2020-02-25 | 2020-08-11 | 天津大学 | Non-interference electrical equipment transient electric field distribution measuring method |
| CN116449077A (en) * | 2023-04-23 | 2023-07-18 | 国网江苏省电力有限公司 | Method for performing time-frequency analysis on PT secondary side disturbance voltage based on Wigner-Ville distribution algorithm |
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| CN116449077A (en) * | 2023-04-23 | 2023-07-18 | 国网江苏省电力有限公司 | Method for performing time-frequency analysis on PT secondary side disturbance voltage based on Wigner-Ville distribution algorithm |
| CN116449077B (en) * | 2023-04-23 | 2024-03-26 | 国网江苏省电力有限公司 | Method for performing time-frequency analysis on PT secondary side disturbance voltage based on Wigner-Ville distribution algorithm |
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