CN202997549U - State monitoring and resonance elimination system for intelligent power grid - Google Patents
State monitoring and resonance elimination system for intelligent power grid Download PDFInfo
- Publication number
- CN202997549U CN202997549U CN 201220633095 CN201220633095U CN202997549U CN 202997549 U CN202997549 U CN 202997549U CN 201220633095 CN201220633095 CN 201220633095 CN 201220633095 U CN201220633095 U CN 201220633095U CN 202997549 U CN202997549 U CN 202997549U
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- resonance
- voltage
- microprocessor
- condition monitoring
- intelligent grid
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- 238000003379 elimination reaction Methods 0.000 title claims abstract description 28
- 230000008030 elimination Effects 0.000 title claims abstract description 27
- 238000012544 monitoring process Methods 0.000 title claims abstract description 17
- 238000002955 isolation Methods 0.000 claims abstract description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 238000013016 damping Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Abstract
The utility model relates to a state monitoring and resonance elimination system for an intelligent power grid. The system comprises a microprocessor, a control circuit, a resonance elimination unit, a signal collection circuit, an isolation transformer, an AD converter, a decoder and a voltage transformer. The system is characterized in that, the voltage transformer is connected with the power grid, and outputs a detected open voltage to the signal collection circuit, and the signal is isolated by the isolation transformer; one path of the isolated signal is provided to the microprocessor for voltage comparison via the AD converter, and the other path of the isolated signal passes through the decoder, and a resonant frequency point is provided to the microprocessor for resonant frequency comparison; the control circuit controls the connection and disconnection of the voltage transformer and the power grid according to the result of the voltage comparison of the microprocessor; and the resonance elimination unit performs a resonance elimination process according to the result of the resonant frequency comparison.
Description
Technical field
The utility model relates to the system of a kind of condition monitoring for intelligent grid and resonance elimination.
Background technology
The core of intelligent grid is to build the intelligent network system of the unified networking of the various energy resources that possesses intelligent decision and adaptive adjustment capability and distributed management, can carry out Real Time Monitoring and collection to electrical network and client's power information, and adopt most economical and safest power transmission and distribution mode with power delivery to the terminal use, allocation optimum and the utilization of realization to electric energy improves reliability and the efficiency of energy utilization of operation of power networks.In China's network system, Ferroresonance Overvoltage Caused by PT and overvoltage can cause the damage of confession, power consumption equipment usually.Ferroresonance Overvoltage Caused by PT and superpotentially hold time longlyer sometimes, but sometimes very short is difficult to the reason of determining that accident occurs.Therefore, be starved of a kind of dependable performance, the intelligent grid zero sequence state device that multiple functional, automaticity is high
The utility model has carried out useful improvement in order to overcome defects.
The utility model content
The purpose of this utility model is to solve above-mentioned deficiency of the prior art, the system that provides a kind of condition monitoring for intelligent grid and resonance to eliminate.
The purpose of this utility model is that the voltage status of intelligent grid is monitored, and eliminates the impact that ferro resonance brings.
to achieve these goals, the technical solution of the utility model is: a kind of for the condition monitoring of intelligent grid and the system of resonance elimination, comprise microprocessor, control circuit, the harmonic elimination unit, signal acquisition circuit, isolating transformer, A/D converter, decoder, voltage transformer, it is characterized in that, described voltage transformer is connected with electrical network, and with the opening Voltage-output that records to signal acquisition circuit, isolate by isolating transformer again, signal one tunnel process A/D conversion that isolation obtains offers microprocessor and carries out voltage ratio, one the tunnel through described decoder export resonance frequency, offer microprocessor and carry out resonance frequency relatively, the described voltage transformer of output control that control circuit obtains according to the microprocessor voltage ratio and the break-make between electrical network, the harmonic elimination unit carries out according to the result of resonance frequency comparison the processing that resonance is eliminated.
The described system of eliminating for condition monitoring and the resonance of intelligent grid also comprises input unit, output device and warning circuit.
The beneficial effects of the utility model: the utility model can to the automatic record of the parameter of electrical network nought state, detect and harmonic elimination all kinds of resonance, and can show and the printing test result automatically.Can harmonic elimination repeatedly, record data are accurate, result of use is good.This system can be directly used in 35kV, the 10kV of 110kV transformer station, and the smart electric grid system of 35kV is used for 110kV, 220kV smart electric grid system after also can revising slightly.
Description of drawings
Fig. 1 is system block diagram of the present utility model;
Wherein, 1: warning circuit, 2: printer, 3: keyboard, 4:LED display unit, 5: microprocessor, 6:A/D transducer, 7: decoder, 8: control circuit, 9: harmonic elimination unit, 10: isolating transformer, 11: voltage transformer, 12: signal acquisition circuit.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is further described.
Embodiment of the present utility model is with reference to shown in Figure 1.
a kind of for the condition monitoring of intelligent grid and the system of resonance elimination, comprise microprocessor, control circuit, the harmonic elimination unit, signal acquisition circuit, isolating transformer, A/D converter, decoder, voltage transformer, it is characterized in that, described voltage transformer is connected with electrical network, and with the opening Voltage-output that records to signal acquisition circuit, isolate by isolating transformer again, signal one tunnel process A/D conversion that isolation obtains offers microprocessor and carries out voltage ratio, one the tunnel through described decoder export resonance frequency, offer microprocessor and carry out resonance frequency relatively, the described voltage transformer of output control that control circuit obtains according to the microprocessor voltage ratio and the break-make between electrical network, the harmonic elimination unit carries out according to the result of resonance frequency comparison the processing that resonance is eliminated.
Further, described condition monitoring and the resonance system eliminated for intelligent grid also comprises input unit, output device and warning circuit.
Further, described output device is LED display unit and printer, described LED display unit is connected real-time display frequency, crest voltage with microprocessor, described printer is used for print frequency numerical value, voltage peak, resonance frequency, voltage peak, beginning and ending time, harmonic elimination number of times.
Further, described input unit is keyboard, is used for keying in order.
Further, described warning circuit is watchdog circuit.
Further, described control circuit comprises that relay and triode control controllable silicon.
Its concrete course of work is: reflected the residual voltage of electrical network three-phase bus at the opening voltage vector of the open delta winding of voltage transformer, when electrical network one mutually or two phase voltages when changing, opening voltage is just followed variation; And when voltage transformer produces ferro resonance, will produce at the open delta end of voltage transformer the voltage signal of same frequency.This signal is entered input from voltage transformer open delta termination, then isolate by isolating transformer, then this signal divides two-way: the one tunnel sends into microprocessor after the A/D converter conversion, through relatively depositing maximum in; Another road is through frequency decoder, and during near operation voltage or earthed voltage, frequency decoder output useful signal is opened A/D and interrupted when input voltage, and microprocessor reads in resonant frequency point.According to the state of voltage max and frequency judgement electrical network and microprocessor, during greater than this resonance frequency, can be defined as resonance when voltage max.The microprocessor driven relay, the contact of relay is controlled silicon controlled microprocessor output signal by triode, drive relay, the contact of relay is controlled the silicon controlled control end by triode, controllable silicon is attempted by the open delta end, when having resonance to occur, under strong damping with the resonance signal damping, through certain harmonic elimination operate time, microprocessor is controlled the controllable silicon cut-off, if after 1s, voltage is still greater than the harmonic elimination operation voltage, then carries out the 2nd time, the 3rd time until the 6th harmonic elimination, while display frequency point value, voltage peak, and report to the police.Store the parameters such as resonance frequency, voltage peak, beginning and ending time, harmonic elimination number of times after withdrawing from resonance.When the electrical network bus has earth fault, will produce the fundamental frequency voltage of certain limit at microprocessor open delta end, when measuring the fundamental frequency voltage of this scope, recorder can automatically show, report to the police and the record trouble data.
The above execution mode has only been expressed a kind of execution mode of the present utility model, but can not therefore be interpreted as the restriction to the utility model scope.Should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.
Claims (6)
1. one kind is used for the condition monitoring of intelligent grid and the system that resonance is eliminated, comprise microprocessor, control circuit, the harmonic elimination unit, signal acquisition circuit, isolating transformer, A/D converter, decoder, voltage transformer, it is characterized in that, described voltage transformer is connected with electrical network, and with the opening Voltage-output that records to signal acquisition circuit, isolate by isolating transformer again, signal one tunnel process A/D conversion that isolation obtains offers microprocessor and carries out voltage ratio, one the tunnel through described decoder export resonance frequency, offer microprocessor and carry out resonance frequency relatively, the described voltage transformer of output control that control circuit obtains according to the microprocessor voltage ratio and the break-make between electrical network, the harmonic elimination unit carries out according to the result of resonance frequency comparison the processing that resonance is eliminated.
2. according to claim 1 for the condition monitoring of intelligent grid and the system of resonance elimination, it is characterized in that: the described system of eliminating for condition monitoring and the resonance of intelligent grid also comprises input unit, output device and warning circuit.
3. according to claim 2 for the condition monitoring of intelligent grid and the system of resonance elimination, it is characterized in that: described output device is LED display unit and printer, described LED display unit is connected real-time display frequency, crest voltage with microprocessor, described printer is used for print frequency numerical value, voltage peak, resonance frequency, voltage peak, beginning and ending time, harmonic elimination number of times.
4. according to claim 2 for the condition monitoring of intelligent grid and the system of resonance elimination, it is characterized in that: described input unit is keyboard, is used for keying in order.
5. according to claim 2 for the condition monitoring of intelligent grid and the system of resonance elimination, it is characterized in that: described warning circuit is watchdog circuit.
6. according to claim 1 for the condition monitoring of intelligent grid and the system of resonance elimination, it is characterized in that: described control circuit comprises relay and triode control controllable silicon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220633095 CN202997549U (en) | 2012-11-27 | 2012-11-27 | State monitoring and resonance elimination system for intelligent power grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220633095 CN202997549U (en) | 2012-11-27 | 2012-11-27 | State monitoring and resonance elimination system for intelligent power grid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202997549U true CN202997549U (en) | 2013-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220633095 Expired - Fee Related CN202997549U (en) | 2012-11-27 | 2012-11-27 | State monitoring and resonance elimination system for intelligent power grid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202997549U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108306274A (en) * | 2018-02-23 | 2018-07-20 | 南京南瑞继保电气有限公司 | A kind of control method that ferromagnetic resonance for electromagnetic voltage transformer is eliminated |
| CN109374967A (en) * | 2018-11-06 | 2019-02-22 | 华中科技大学 | A kind of detection method and system towards low reactance-resistance ratio SAW magnetoelectric transducer resonance frequency |
-
2012
- 2012-11-27 CN CN 201220633095 patent/CN202997549U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108306274A (en) * | 2018-02-23 | 2018-07-20 | 南京南瑞继保电气有限公司 | A kind of control method that ferromagnetic resonance for electromagnetic voltage transformer is eliminated |
| CN108306274B (en) * | 2018-02-23 | 2019-04-09 | 南京南瑞继保电气有限公司 | A kind of control method that ferromagnetic resonance for electromagnetic voltage transformer is eliminated |
| CN109374967A (en) * | 2018-11-06 | 2019-02-22 | 华中科技大学 | A kind of detection method and system towards low reactance-resistance ratio SAW magnetoelectric transducer resonance frequency |
| CN109374967B (en) * | 2018-11-06 | 2020-05-19 | 华中科技大学 | Detection method and system for resonant frequency of low-Q-value SAW (surface Acoustic wave) magnetoelectric sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130612 Termination date: 20151127 |