CN101846708B - Method for detecting power-failure counting function of distribution transformer terminals in batch - Google Patents
Method for detecting power-failure counting function of distribution transformer terminals in batch Download PDFInfo
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- CN101846708B CN101846708B CN2010101714000A CN201010171400A CN101846708B CN 101846708 B CN101846708 B CN 101846708B CN 2010101714000 A CN2010101714000 A CN 2010101714000A CN 201010171400 A CN201010171400 A CN 201010171400A CN 101846708 B CN101846708 B CN 101846708B
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Abstract
The invention discloses a method for detecting power-failure counting function of distribution transformer terminals in batch, which comprises the following steps of: 1, connecting voltage and current lines to a plurality of distribution transformer terminals to be detected, and hanging on a meter hanging frame; 2, setting the communication connection of the terminals to be detected and a PC; 3, setting the connection mode, and voltage and current basic parameters of the terminals to be detected through the PC; 4, setting or calling the pre-stored test scheme through PC software; 5, sending commands to the distribution transformer terminals to be detected and a source table control cabinet by using the PC, outputting various voltage environments, and testing the distribution transformer terminals to be detected; and 6, reading voltage and current values of a standard table through a serial port and sequentially calculating real voltage monitoring data by using the PC, and comparing the voltage monitoring data of the terminals read by the PC through the network with the voltage monitoring data values of the standard table to obtain a conclusion. The method solves the problems that the conventional detection method has troublesome indoor detection process, too long actual detection time, high workload and the like, and has the advantages of high efficiency of production test, accurate and reliable test results and the like.
Description
Technical field
The present invention relates to the field tests of distribution transformer terminals power failure monitoring and statistics function, a kind of method of batch detection distribution transformer terminals power-failure counting function is provided.
Background technology
Whether qualified the power-failure counting function of distribution transformer terminals equipment is needs to detect; Conventional detection mainly is the power-off event of artificial manufacturing distribution transformer terminals; Wait for the corresponding time, the scene is checked distribution transformer terminals record or is utilized single the calling together of main website program to read the distribution transformer terminals data recorded and compare detection then.Specific as follows; Distribution transformer terminals is hung in the power utilization environment; Artificial then outage manufactures the terminal power-off event; Wait for again surpassing 24 hours, perhaps for more time be used for striding and day stride the detection of the power off time of moon power-failure counting function, and need repeat repeatedly to detect the detection of frequency of power cut in the power-failure counting.Detect to get up to waste time and energy; Need to wait for actual time for a long time; And can only detect a terminal at every turn; Such method not only can't satisfy existing each distribution transformer terminals producer and the high efficiency meter inspection work of metrological service of Utilities Electric Co., can not carry out detailed detection comprehensively to the power-failure counting function of distribution transformer terminals.
Summary of the invention
For efficient and accuracy problem that the power-failure counting function that solves existing distribution transformer terminals equipment detects, the present invention provides a kind of method of batch detection distribution transformer terminals power-failure counting function.
To achieve these goals, the batch detector methods that the present invention taked may further comprise the steps:
A. a plurality of tested distribution transformer terminals are connected the voltage and current line, and hang on the meter hanging frame;
B. the IP that sets tested distribution transformer terminals is connected communication with port numbers with the PC communication;
C. basic parameters such as the mode of connection through the good tested distribution transformer terminals of PC software setting, voltage, electric current;
D. perhaps call the distribution transformer terminals power-failure counting testing scheme of preserving in advance through the PC software setting;
E. send instruction by PC to tested distribution transformer terminals and three phase power source, simulate various power failure environment, tested distribution transformer terminals is tested automatically;
F. call the power failure data of reading tested distribution transformer terminals together through the PC network, and compare, draw the accuracy conclusion of tested distribution transformer terminals power-failure counting function with the power failure data value of theory.
In the said step e tested distribution transformer terminals tested automatically and comprise: power-failure counting inspection normal time, stride the power-failure counting inspection that resets of month power-failure counting inspection and terminal.
Described power-failure counting inspection normal time may further comprise the steps:
7) design a plurality of scheme subitems through PC, each scheme subitem is that each phase voltage of three phase power source output is got a value in the 0%-150% of normal voltage scope, and each phase current of output is got a value in the 0%-100% of normalized current scope;
8) export the electric current of three-phase 100%U voltage, 50%I by PC power controlling source, and make tested distribution transformer terminals under this voltage, move more than or equal to 1 minute;
9) by PC be provided with tested distribution transformer terminals and PC time itself for certain year in such a month, and on such a day certain constantly, this is greater than all scheme subitems required time that all is finished from the time gap on 24 o'clock same day constantly;
10) by scheme subitem order; Set each phase voltage and the electric current of PC control three phase power source output scheme sub-project; And note the moment t1 that each scheme subitem begins, the duration T minute (T＞=3) that the operating scheme sub-project is set is noted moment t2 at this moment by PC again; Carry out one time step 2) and then carry out next scheme subitem, so be circulated to all scheme subitems and all be finished;
11) by power-failure counting data normal time of the PC theory of computation, the power-failure counting data comprise: added up power off time the same day; Added up frequency of power cut the same day; The each zero hour and finish time that has a power failure on the same day;
12) call the power-failure counting data of reading dut terminal record by PC together through network, and with theoretical value relatively, calculate error, if error in allowed limits then be judged as qualifiedly, otherwise is defective.
Saidly stride the inspection of month power-failure counting and may further comprise the steps:
1) a plurality of scheme subitems of design, each scheme subitem are that each phase voltage of three phase power source output is got a value in the 0%-150% of normal voltage scope, and each phase current of output is got a value in the 0%-100% of normalized current scope;
7), and make the terminal under this electric current and voltage, move more than or equal to 1 minute by PC power controlling source output three-phase 100%U voltage, 50%I electric current;
8) by PC tested distribution transformer terminals and PC time itself is set and carves for some time at certain month the end of month certain year, this is less than all scheme subitems required time that all is finished from the time gap on 24 o'clock same day constantly;
9) by scheme subitem order; Set each phase voltage and the electric current of PC control three phase power source output scheme sub-project; And note the moment t1 that each scheme subitem begins, the duration T minute (T＞=3) that the operating scheme sub-project is set is noted moment t2 at this moment by PC again; Carry out one time step 2) and then carry out next scheme subitem, so be circulated to all scheme subitems and all be finished;
10) by month power-failure counting data of striding of the PC theory of computation, comprising: when the month to date power off time; When the month to date frequency of power cut; The of that month each zero hour and finish time that has a power failure;
11) call the power-failure counting data of reading dut terminal record by PC together through network, and with theoretical value relatively, calculate error, if error in allowed limits then be judged as qualifiedly, otherwise is defective.
The reset power-failure counting inspection of said terminal may further comprise the steps:
3) call the power-failure counting data of reading dut terminal by PC together through network, comprising: had a power failure the cumulative time same day, the cumulative number that had a power failure the same day, and had a power failure the zero hour and the finish time same day at every turn;
4) send reset instruction by PC through network and make the terminal reset, and wait for 5 minutes and let it reach the standard grade automatically;
3) call the power-failure counting data of reading dut terminal together through network once more by PC, with 1) said data relatively, see whether change, then defective if change, if do not change then qualified.
The used equipment of the batch detector methods of distribution transformer terminals power-failure counting function of the present invention comprises: be used for to three phase power source send the control sourse instruction PC, be used for the three phase power source in the source of rising, Ji Yuan and be used for and connect the meter hanging frame of a plurality of tested distribution transformer terminals of carry when being used to obtain the standard of standard time; Described PC has control line to be electrically connected with each parts and tested distribution transformer terminals, and described three phase power source is connected with a plurality of tested distribution transformer terminals live wires, and the electric current line and the pressure-wire of a plurality of tested distribution transformer terminals are attempted by on the described meter hanging frame.
Said PC possesses can let the IP and the port numbers of terminal connected reference.
Said tested distribution transformer terminals is for using the distribution transformer terminals of Guangdong Power Grid company 0903 edition distribution transforming office terminal communication protocol.
Beneficial effect of the present invention is: this method adopts PC control; Can realize that automatic batch carries out the detection of the power-failure counting function of distribution transformer terminals; This method is also repaiied through network the time at seized terminal surely is set, and the time that reaches is striden the effect of striding the moon day fast, has improved detection speed; This method can also be provided with the different detection scheme, and can a plurality of contents of distribution transformer terminals power-failure counting function be detected, and has improved the accuracy that detects.Generally speaking the inventive method has improved the efficient that the distribution transformer terminals power-failure counting function detects; Alleviated the work load of electric-power metering department and terminal producer research and development debugging; Reduced the time that the distribution transformer terminals power-failure counting function detects; Make also simultaneously that the content of this Function detection is more detailed comprehensively, the result of detection is also more accurate.
Description of drawings
Set accompanying drawing and specific embodiment are done further detailed description to the present invention below.
Fig. 1 is the process flow diagram of method of testing in the distribution transformer terminals power-failure counting function detection method of the present invention;
Fig. 2 is a device structure synoptic diagram described in the distribution transformer terminals power-failure counting function detection method of the present invention;
Fig. 3 is the wiring diagram (is example with the three-phase and four-line) at three phase power source and tested polylith terminal in the distribution transformer terminals power-failure counting function detection method of the present invention;
Fig. 4 is the communication figure of PC and each equipment room in the distribution transformer terminals power-failure counting function detection method of the present invention.
Embodiment
Referring to Fig. 2 and shown in Figure 3, the used equipment of batch detector methods of the present invention comprises: be used for to three phase power source send the control sourse instruction PC 1, be used for the three phase power source 2 in the source of rising, base source 3 and be used for and connect the meter hanging frame 4 of a plurality of tested distribution transformer terminals of carry when being used to obtain the standard of standard time; Described PC has control line to be electrically connected with each parts and tested distribution transformer terminals 5; Three phase power source is connected with a plurality of tested distribution transformer terminals live wires; The electric current line and the pressure-wire of a plurality of tested distribution transformer terminals are attempted by on the meter hanging frame; PC possesses can let the IP and the port numbers of terminal connected reference; Tested distribution transformer terminals also can be to use power load management system data transmission stipulations distribution transformer monitoring and metering terminal for using the distribution transformer terminals of Guangdong Power Grid company 0903 edition distribution transforming office terminal communication protocol.
Referring to Fig. 1, the batch detector methods step of distribution transformer terminals power-failure counting function of the present invention is following:
A. a plurality of tested distribution transformer terminals are connected the voltage and current line, and hang on the meter hanging frame;
B. the IP that sets tested distribution transformer terminals is connected communication with port numbers with the PC communication;
C. basic parameters such as the mode of connection through the good tested distribution transformer terminals of PC software setting, voltage, electric current;
D. perhaps call the distribution transformer terminals power-failure counting testing scheme of preserving in advance through the PC software setting;
E. send instruction by PC to tested distribution transformer terminals and three phase power source, simulate various power failure environment, tested distribution transformer terminals is tested automatically;
F. call the power failure data of reading tested distribution transformer terminals together through the PC network, and compare, draw the accuracy conclusion of tested distribution transformer terminals power-failure counting function with the power failure data value of theory.
In the said step e tested distribution transformer terminals tested automatically and comprise: power-failure counting inspection normal time, stride the power-failure counting inspection that resets of month power-failure counting inspection and terminal.
Described power-failure counting inspection normal time may further comprise the steps:
1) design a plurality of scheme subitems through PC, each scheme subitem is that each phase voltage of three phase power source output is got a value in the 0%-150% of normal voltage scope, and each phase current of output is got a value in the 0%-100% of normalized current scope;
2) export the electric current of three-phase 100%U voltage, 50%I by PC power controlling source, and make tested distribution transformer terminals under this voltage, move more than or equal to 1 minute;
3) by PC be provided with tested distribution transformer terminals and PC time itself for certain year in such a month, and on such a day certain constantly, this is greater than all scheme subitems required time that all is finished from the time gap on 24 o'clock same day constantly;
4) by scheme subitem order; Set each phase voltage and the electric current of PC control three phase power source output scheme sub-project; And note the moment t1 that each scheme subitem begins, the duration T minute (T＞=3) that the operating scheme sub-project is set is noted moment t2 at this moment by PC again; Carry out one time step 2) and then carry out next scheme subitem, so be circulated to all scheme subitems and all be finished;
5) by power-failure counting data normal time of the PC theory of computation, the power-failure counting data comprise: added up power off time the same day; Added up frequency of power cut the same day; The each zero hour and finish time that has a power failure on the same day;
6) call the power-failure counting data of reading dut terminal record by PC together through network, and with theoretical value relatively, calculate error, if error in allowed limits then be judged as qualifiedly, otherwise is defective.
Saidly stride the inspection of month power-failure counting and may further comprise the steps:
1) a plurality of scheme subitems of design, each scheme subitem are that each phase voltage of three phase power source output is got a value in the 0%-150% of normal voltage scope, and each phase current of output is got a value in the 0%-100% of normalized current scope;
2), and make the terminal under this electric current and voltage, move more than or equal to 1 minute by PC power controlling source output three-phase 100%U voltage, 50%I electric current;
3) by PC tested distribution transformer terminals and PC time itself is set and carves for some time at certain month the end of month certain year, this is less than all scheme subitems required time that all is finished from the time gap on 24 o'clock same day constantly;
4) by scheme subitem order; Set each phase voltage and the electric current of PC control three phase power source output scheme sub-project; And note the moment t1 that each scheme subitem begins, the duration T minute (T＞=3) that the operating scheme sub-project is set is noted moment t2 at this moment by PC again; Carry out one time step 2) and then carry out next scheme subitem, so be circulated to all scheme subitems and all be finished;
5) by month power-failure counting data of striding of the PC theory of computation, comprising: when the month to date power off time; When the month to date frequency of power cut; The of that month each zero hour and finish time that has a power failure;
6) call the power-failure counting data of reading dut terminal record by PC together through network, and with theoretical value relatively, calculate error, if error in allowed limits then be judged as qualifiedly, otherwise is defective.
The reset power-failure counting inspection of said terminal may further comprise the steps:
1) call the power-failure counting data of reading dut terminal by PC together through network, comprising: had a power failure the cumulative time same day, the cumulative number that had a power failure the same day, and had a power failure the zero hour and the finish time same day at every turn;
2) send reset instruction by PC through network and make the terminal reset, and wait for 5 minutes and let it reach the standard grade automatically;
3) call the power-failure counting data of reading dut terminal together through network once more by PC, with 1) said data relatively, see whether change, then defective if change, if do not change then qualified.
Specific practice is as follows:
See also shown in Figure 1ly, in step S101, tested distribution transformer terminals is connected pressure-wire and hang on the meter hanging frame; The IP that in step S102, sets terminal to be detected with port numbers so that be connected communication with PC; At basic parameters such as the mode of connection of step S103 through the good terminal to be detected of PC software setting, voltage, electric currents; Then perhaps call the distribution transformer terminals power-failure counting testing scheme of preserving in advance among the step S104 through the PC software setting; Then send instruction to tested distribution transformer terminals and three phase power source again at step S105, simulate various power failure environment, tested distribution transformer terminals is tested by PC; In step S106, call the power failure data of reading the terminal together, and compare, judge the conclusion of tested distribution transformer terminals power-failure counting function with the power failure data value of theory through the PC network; The standard time of Ji Yuan when in step S107, reading through PC, and will reduce the time to be provided with and give tested distribution transformer terminals.
Wherein, among the step S105 tested distribution transformer terminals tested and specifically comprise following substep: substep S105-1, carry out the normal time power-failure counting to tested distribution transformer terminals and detect; Substep S105-2 strides moon power-failure counting to tested distribution transformer terminals and detects; Substep S105-3 detects the tested distribution transformer terminals power-failure counting that resets.
In substep S105-1, tested distribution transformer terminals is carried out the calibrating scheme that normal time, power-failure counting detected is specially down:
A1: each phase voltage percent value: ua=ub=uc=58% of three phase power source output; Each phase voltage percent value: ia=ib=ic=0% of three phase power source output; Duration T=3.
A2: each phase voltage percent value: ua=ub=uc=62% of three phase power source output; Each phase voltage percent value: ia=ib=ic=0% of three phase power source output; Duration T=3.
A3: each phase voltage percent value: ua=ub=uc=65% of three phase power source output; Each phase voltage percent value: ia=ib=ic=0% of three phase power source output; Duration T=3.
A4: each phase voltage percent value: ua=ub=uc=100% of three phase power source output; Each phase voltage percent value: ia=ib=ic=50% of three phase power source output; Duration T=3.
A5: each phase voltage percent value: ua=ub=uc=20% of three phase power source output; Each phase voltage percent value: ia=ib=ic=0% of three phase power source output; Duration T=5.
A6: each phase voltage percent value: ua=ub=uc=65% of three phase power source output; Each phase voltage percent value of three phase power source output: i a=ib=ic=0%; Duration T=3.
A7: each phase voltage percent value: ua=ub=uc=65% of three phase power source output; Each phase voltage percent value: ia=ib=ic=0.4% of three phase power source output; Duration T=5.
A8: each phase voltage percent value: ua=ub=uc=80% of three phase power source output; Each phase voltage percent value: ia=ib=ic=50% of three phase power source output; Duration T=3.
In substep S105-1, the described theoretical accumulative total power off time of step 5, its computing method are following:
Accumulative total power off time
divides wherein; (the number of times of the actual power failure of N=; The finish time that ti2=has a power failure for the i time; The zero hour that ti1=has a power failure for the i time, ti1, ti2 all are unit with the second)
The finish time and the zero hour are changed into branch divided by 60 with the second for the unit subtraction calculations goes out to add up behind each power off time number second again, and this algorithm helps to reduce the error of theory of computation cumulative time in the testing process.
In substep S105-2, it is identical with substep S105-1 that tested distribution transformer terminals is striden the calibrating scheme that moon power-failure counting detects.
In substep S105-3, the tested distribution transformer terminals power-failure counting that resets is detected and may further comprise the steps:
1) call the power-failure counting data of reading dut terminal by PC together through network, comprising: had a power failure the cumulative time same day, the cumulative number that had a power failure the same day, and had a power failure the zero hour and the finish time same day at every turn;
2) send reset instruction by the PC machine through network and make the terminal reset, and wait for 5 minutes and let it reach the standard grade automatically;
3) call the power-failure counting data of reading dut terminal together through network once more by PC, with 1) said data relatively, see whether change, then defective if change, if do not change then qualified.
Claims (7)
1. the method for the power-failure counting function of a batch detection distribution transformer terminals is characterized in that may further comprise the steps:
A. a plurality of tested distribution transformer terminals are connected the voltage and current line, and hang on the meter hanging frame;
B. the IP that sets tested distribution transformer terminals is connected communication with port numbers with the PC communication;
C. pass through the mode of connection, voltage, the current basic parameters of the good tested distribution transformer terminals of PC software setting;
D. perhaps call the distribution transformer terminals power-failure counting testing scheme of preserving in advance through the PC software setting;
E. send instruction by PC to tested distribution transformer terminals and three phase power source, simulate various power failure environment, tested distribution transformer terminals is tested automatically;
F. call the power failure data of reading tested distribution transformer terminals together through the PC network, and compare, draw the accuracy conclusion of tested distribution transformer terminals power-failure counting function with the power failure data value of theory.
2. the method for the power-failure counting function of batch detection distribution transformer terminals according to claim 1 is characterized in that: in the said step e tested distribution transformer terminals tested automatically and comprise: power-failure counting inspection normal time, stride the power-failure counting inspection that resets of month power-failure counting inspection and terminal.
3. the method for the power-failure counting function of batch detection distribution transformer terminals according to claim 2 is characterized in that: described power-failure counting inspection normal time may further comprise the steps:
1) design a plurality of scheme subitems through PC, each scheme subitem is that each phase voltage of three phase power source output is got a value in the 0%-150% of normal voltage scope, and each phase current of output is got a value in the 0%-100% of normalized current scope;
2) export the electric current of three-phase 100%U voltage, 50%I by PC power controlling source, and make tested distribution transformer terminals under this voltage, move more than or equal to 1 minute;
3) by PC be provided with tested distribution transformer terminals and PC time itself for certain year in such a month, and on such a day certain constantly, this is greater than all scheme subitems required time that all is finished from the time gap on 24 o'clock same day constantly;
4) by scheme subitem order; Set each phase voltage and the electric current of PC control three phase power source output scheme sub-project; And note the moment t1 that each scheme subitem begins, the set duration T of operating scheme sub-project was noted the moment t2 of this moment again more than or equal to 3 minutes by PC; Carry out one time step 2) and then carry out next scheme subitem, so be circulated to all scheme subitems and all be finished;
5) by power-failure counting data normal time of the PC theory of computation, the power-failure counting data comprise: added up power off time the same day; Added up frequency of power cut the same day; The each zero hour and finish time that has a power failure on the same day;
6) call the power-failure counting data of reading dut terminal record by PC together through network, and with theoretical value relatively, calculate error, if error in allowed limits then be judged as qualifiedly, otherwise is defective.
4. the method for the power-failure counting function of batch detection distribution transformer terminals according to claim 3 is characterized in that: saidly stride the inspection of month power-failure counting and may further comprise the steps:
1) a plurality of scheme subitems of design, each scheme subitem are that each phase voltage of three phase power source output is got a value in the 0%-150% of normal voltage scope, and each phase current of output is got a value in the 0%-100% of normalized current scope;
2), and make the terminal under this electric current and voltage, move more than or equal to 1 minute by PC power controlling source output three-phase 100%U voltage, 50%I electric current;
3) by PC tested distribution transformer terminals and PC time itself is set and carves for some time at certain month the end of month certain year, this is less than all scheme subitems required time that all is finished from the time gap on 24 o'clock same day constantly;
4) by scheme subitem order; Set each phase voltage and the electric current of PC control three phase power source output scheme sub-project; And note the moment t1 that each scheme subitem begins, the set duration T of operating scheme sub-project was noted the moment t2 of this moment again more than or equal to 3 minutes by PC; Carry out one time step 2) and then carry out next scheme subitem, so be circulated to all scheme subitems and all be finished;
5) by month power-failure counting data of striding of the PC theory of computation, comprising: when the month to date power off time; When the month to date frequency of power cut; The of that month each zero hour and finish time that has a power failure;
6) call the power-failure counting data of reading dut terminal record by PC together through network, and with theoretical value relatively, calculate error, if error in allowed limits then be judged as qualifiedly, otherwise is defective.
5. the method for the power-failure counting function of batch detection distribution transformer terminals according to claim 4 is characterized in that: the reset power-failure counting inspection of said terminal may further comprise the steps:
1) call the power-failure counting data of reading dut terminal by PC together through network, comprising: had a power failure the cumulative time same day, the cumulative number that had a power failure the same day, and had a power failure the zero hour and the finish time same day at every turn;
2) send reset instruction by PC through network and make the terminal reset, and wait for 5 minutes and let it reach the standard grade automatically;
3) call the power-failure counting data of reading dut terminal together through network once more by PC, with 1) said data relatively, see whether change, then defective if change, if do not change then qualified.
6. according to the used equipment of batch detector methods of the described any distribution transformer terminals power-failure counting function of claim 1 to 5, it is characterized in that: comprise be used for to three phase power source send the control sourse instruction PC, be used for the source of rising three phase power source, be used to obtain the standard scale of actual current voltage, Ji Yuan and be used for and connect the meter hanging frame of a plurality of tested distribution transformer terminals of carry when being used to obtain the standard of standard time; Described PC has control line to be electrically connected with each parts and tested distribution transformer terminals, and described three phase power source is connected with a plurality of tested distribution transformer terminals live wires, and the electric current line and the pressure-wire of a plurality of tested distribution transformer terminals are attempted by on the described meter hanging frame.
7. equipment according to claim 6 is characterized in that: it is through GPRS/CDMA network and serial ports RS232 that said PC is connected with the communication at terminal to be tested.
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| CN104198797A (en) * | 2014-08-26 | 2014-12-10 | 广东电网公司电力科学研究院 | Voltage detection method, system and device |
| CN105301412A (en) * | 2015-11-20 | 2016-02-03 | 国网上海市电力公司 | Method and system for automatic terminal detection |
| CN108665186B (en) * | 2018-05-22 | 2021-03-12 | 广东电网有限责任公司电力科学研究院 | Distribution transformer overload power failure monitoring method and device based on metering automation system |
| CN111239660A (en) * | 2019-09-17 | 2020-06-05 | 惠州化能汇通智能科技有限公司 | Novel full-automatic batch calibration device of distribution transformer intelligent monitoring terminal |
| CN112766636B (en) * | 2020-12-23 | 2022-11-15 | 国网河南省电力公司电力科学研究院 | Distribution transformer power failure judgment method based on electric quantity information acquired by power consumption information acquisition terminal |
| CN114034948A (en) * | 2021-10-25 | 2022-02-11 | 国网江西省电力有限公司电力科学研究院 | Distribution transformer outage study and judgment method based on multi-source data fusion |
| CN114500350B (en) * | 2021-12-27 | 2024-02-06 | 中国航天空气动力技术研究院 | Ground station instruction verification system |
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| CN1088843C (en) * | 1996-07-22 | 2002-08-07 | 施鲁博格工业公司 | Electronic metering device with automatic service sensor |
| CN2483882Y (en) * | 2000-10-11 | 2002-03-27 | 陈钢 | Power distribution integral test instrument for data receiving and transmiting |
| CN1347184B (en) * | 2000-10-11 | 2010-12-29 | 陈钢 | Distribution load monitor system |
| CN101634680B (en) * | 2009-08-07 | 2011-09-07 | 北京晧通兴业科技有限公司 | Remote monitoring device and remote monitoring method of distribution transformer |
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