CN201740855U - On-line multifunctional monitoring device of generator excited system - Google Patents
On-line multifunctional monitoring device of generator excited system Download PDFInfo
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- CN201740855U CN201740855U CN2010202177268U CN201020217726U CN201740855U CN 201740855 U CN201740855 U CN 201740855U CN 2010202177268 U CN2010202177268 U CN 2010202177268U CN 201020217726 U CN201020217726 U CN 201020217726U CN 201740855 U CN201740855 U CN 201740855U
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 7
- 238000005259 measurement Methods 0.000 claims description 40
- 238000005070 sampling Methods 0.000 claims description 32
- 238000012544 monitoring process Methods 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 5
- 230000002349 favourable effect Effects 0.000 abstract 1
- 230000035772 mutation Effects 0.000 abstract 1
- 230000005284 excitation Effects 0.000 description 16
- 230000003750 conditioning effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000005622 photoelectricity Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
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Abstract
The utility model discloses an on-line multifunctional monitoring device of a generator excited system, which relates to the monitoring technology of the generator excited system. The utility model is structurally characterized in that a generator rotator current and voltage measuring loop (1), a generator stator current and voltage measuring loop (2), a rectifier bridge AC side current and voltage measuring loop (3) and a switching value measuring loop (4) are respectively connected with a prepositive sampler computer system (5), and the prepositive sampler computer system (5), a background computer (6) and a display device (7) are sequentially connected at the front part and the back part. The utility model carries out real-time monitoring on the state of the excited system, reflects the state of a generator and the excited system in time, guides the equipment operation, improves the safe operation level of the generator and electric networks, can realize automatic recording and broadcasting on mutation events, is favorable for fault analysis and accident handling, and can be installed and used on the excited system of each combined generator.
Description
Technical field
The utility model relates to a kind of monitoring technology of generator excited system, relates in particular to the online multifunctional monitoring device of a kind of generator excited system.
Background technology
Excitation system is the important component part of synchronous generator, is one of crucial opertaing device of generator; It has direct influence to operational reliability, economy and other characteristic of generator; Good excitation system can improve electric system and generator stability limit level and running technology economic target effectively.Because excitation system has important effect for the stable operation of generator and electric system, so in a single day excitation system break down, and its influence that causes will be very big.In order to guarantee that excitation system normally moves, reduce the loss that fault causes, need to adopt the energizing apparatus of high reliability on the one hand; On the other hand, in order in time to understand the running status of excitation system, the processing of quickening accident and the analysis of causes need so the state of excitation system is monitored the behaviour of going forward side by side the record ripple.
For ease of maintenance and the fault analysis of carrying out equipment, the generator failure wave recording device all is housed in many power plant.Sending out change group fault oscillograph is one of important secondary device of electric system, its effect has two: the one, and the situation of change of monitoring and recording system various electric parameters under different operating conditions and malfunction, understand the running status Changing Pattern of each electric parameters of unit, for systematic analysis provides foundation; The 2nd, the action behavior of check unit relay protection and automatic safety device plays an important role for guaranteeing safe operation of power system and improving the quality of power supply.But it is limited to the monitoring variable of excitation system to send out change group fault wave recording device, and to the not monitoring basically of excitation system power cell.When fault takes place, when particularly excitation system breaks down, can only point out to protect the reason of tripping operation, can't carry out deep analysis to generation, the development of fault.And excitation system is a continuous dynamic adjustment process, it is various that its system forms complexity, failure cause and phenomenon, and be tied in a hundred and one ways with many external variables such as generator and electric system, this has brought very big difficulty with safeguarding decision-making just for operation maintenance personnel's fault judgement.
At present, the domestic online multifunctional monitoring device that does not still have the independent configuration of generator excitation system.
Summary of the invention:
The purpose of this utility model is exactly in order to overcome the shortcoming and deficiency that prior art exists, to provide a kind of generator excited system online multifunctional monitoring device.
The purpose of this utility model is achieved in that
The utility model includes generator rotor current voltage measurement circuit, generator unit stator current-voltage measurement loop, rectifier bridge ac-side current voltage measurement circuit, switching value measurement loop, preposition sampling thief computer system, background computer and display device;
Generator rotor current voltage measurement circuit, generator unit stator current-voltage measurement loop, rectifier bridge ac-side current voltage measurement circuit and switching value are measured the loop and are connected with preposition sampling thief computer system respectively; Preposition sampling thief computer system, background computer are connected successively with display device.
Principle of work
The input end of generator rotor current voltage measurement circuit links to each other with Generator's Rotor Circuit, directly detects generator amature voltage, and detects generator rotor current by shunt; Generator rotor current voltage measurement circuit output terminal links to each other with preposition sampling thief computer system, detected generator amature voltage and electric current is delivered to the A/D change-over circuit that extends out in the preposition sampling thief computer system board sample after isolating conditioning.
The input end in generator unit stator current-voltage measurement loop links to each other with generator terminal voltage mutual inductor summation current transformer, its output terminal links to each other with preposition sampling thief computer system, three-phase alternating voltage signal and three-phase alternating current signal are isolated the built-in A/D change-over circuit of CPU of delivering to preposition sampling thief computer system after the conditioning sample, and by calculating generator active power, reactive power and power factor.
The input end of rectifier bridge ac-side current voltage measurement circuit links to each other with the voltage transformer (VT) summation current transformer of rectifier bridge AC side, its output terminal links to each other with preposition sampling thief computer system, three-phase alternating voltage signal and three-phase alternating current signal are isolated the built-in A/D change-over circuit of CPU of delivering to preposition sampling thief computer system after the conditioning sample, and will cross the pilot angle of the phase-detection rectifier bridge between the measuring voltage electric current.
The input end that switching value is measured the loop links to each other with signals such as generator outlet isolating switch, generator field isolating switch, rectifier bridge AC side switch and DC side switches, its output terminal links to each other with preposition sampling thief computer system, the switching value signal is sent switching value input circuit in the preposition sampling thief computing machine plate after photoelectricity is isolated.
The output terminal of preposition sampling thief computer system links to each other with the input end of background computer, the result who detects is delivered to background computer carry out state on_line monitoring and record ripple.
The output terminal of background computer links to each other with the input end of display device, is used to show relevant information.
Background computer disposes related software, to realize state and the parameter online to generator excited system, to the generator excited system logout, the generator excited system fault is recorded ripple, to generator excited system test and performance evaluation.
The utlity model has following advantage and good effect:
1, the state of excitation system is monitored in real time, in time reflect the state of generator and excitation system, equipment operation is instructed, improve the safety operation level of generator and electrical network.
2, catastrophic event is recorded ripple automatically, help fault analysis and accident treatment.
3, can on the excitation system of the machine that respectively generates electricity by way of merging two or more grid systems, install and use.
Description of drawings
Fig. 1 is the utility model block diagram.
Wherein:
1-generator rotor current voltage measurement circuit;
2-generator unit stator current-voltage measurement loop;
3-rectifier bridge ac-side current voltage measurement circuit;
The 4-switching value is measured the loop;
The preposition sampling thief computer system of 5-;
The 6-background computer;
The 7-display device.
Embodiment
Describe in detail below in conjunction with drawings and Examples:
One, overall
As Fig. 1, the utility model includes generator rotor current voltage measurement circuit 1, generator unit stator current-voltage measurement loop 2, rectifier bridge ac-side current voltage measurement circuit 3, switching value measurement loop 4, preposition sampling thief computer system 5, background computer 6 and display device 7;
Generator rotor current voltage measurement circuit 1, generator unit stator current-voltage measurement loop 2, rectifier bridge ac-side current voltage measurement circuit 3 and switching value are measured loop 4 and are connected with preposition sampling thief computer system 5 respectively; Preposition sampling thief computer system 5, background computer 6 and display device 7 front and back are connected successively.
Two, functional block
1, the generator rotor current voltage measurement circuit 1
Draw DC voltage from book box rotor side in generator rotor current voltage measurement circuit 1 through electric resistance partial pressure after isolated amplifier (as ISO122 or ISO124) is delivered to filtering and the gain adjustment circuit of being made up of operational amplifier, the d. c. voltage signal conditioning of input is delivered to the A/D change-over circuit that preposition sampling thief computer system 5 extends out for the voltage signal of 0-10V, be used to measure generator amature voltage.
In addition, draw the signal of self power generation machine rotor side direct current shunt and deliver to filtering and the gain adjustment circuit of forming by operational amplifier, the d. c. voltage signal conditioning of input is delivered to the A/D change-over circuit that preposition sampling thief computer system 5 extends out for the voltage signal of 0-10V through isolated amplifier (as ISO122 or ISO124).Be used for measuring the generating rotor current.
2, generator unit stator current-voltage measurement loop 2
The three-phase voltage that draws self power generation machine stator side after measuring mutual inductor and isolating, is transformed to the alternating signal of 0-10V through operational amplifier in generator unit stator current-voltage measurement loop 2, deliver to preposition sampling thief computer system 5 built-in A/D change-over circuits.Be used to measure the three-phase alternating voltage signal of generator unit stator side.In addition, ac voltage signal also is transformed to square-wave signal behind shaping circuit, delivers to the high speed signal input circuit in the preposition sampling thief computer system 5, is used to measure the frequency of generator and the phase place of voltage.
Meanwhile, the three-phase current that draws self power generation machine stator side in generator unit stator current-voltage measurement loop 2 after measuring mutual inductor and isolating, be transformed to the alternating signal of 0-10V through operational amplifier, deliver to preposition sampling thief computer system 5 built-in A/D change-over circuits.Be used to measure the three-phase alternating current signal of generator unit stator side.
3, rectifier bridge ac-side current voltage measurement circuit 3
The three-phase voltage that draws self-rectifying bridge AC side after measuring mutual inductor and isolating, is transformed to the alternating signal of 0-10V through operational amplifier at rectifier bridge ac-side current voltage measurement circuit 3, delivers to preposition sampling thief computer system 5 built-in A/D change-over circuits.The three-phase alternating voltage signal that is used for the rectifier bridge AC side.In addition, ac voltage signal also is transformed to square-wave signal behind shaping circuit, delivers to the high speed signal input circuit in the preposition sampling thief computer system 5, is used to measure the phase place of the three-phase alternating voltage amount of rectifier bridge AC side.
Meanwhile, the ac current signal that draws the three-phase current of self-rectifying bridge AC side or rectifier bridge brachium pontis in rectifier bridge ac-side current voltage measurement circuit 3 after measuring mutual inductor and isolating, be transformed to the alternating signal of 0-10V through operational amplifier, deliver to preposition sampling thief computer system 5 built-in A/D change-over circuits.Be used to measure the three-phase alternating current signal of rectifier bridge AC side.In addition, ac current signal also is transformed to square-wave signal behind shaping circuit, delivers to the high speed signal input circuit in the preposition sampling thief computer system 5, is used to measure the phase place of the three-phase alternating current flow of rectifier bridge AC side.
4, switching value is measured loop 4
Switching value is measured loop 4 and is adopted photoelectric isolation technology, and its function is that signals such as generator outlet isolating switch, generator field isolating switch, rectifier bridge AC side switch and DC side switch are delivered to switching value input circuit in the preposition sampling thief computer system 5 after photoelectricity is isolated.
5, preposition sampling thief computer system 5
Preposition sampling thief computer system 5 is made of DSP.
Its function is to gather generator amature voltage and the rotor current that generator rotor current voltage measurement circuit 1 is introduced; Gather generator unit stator side three-phase voltage and the three-phase current that introduce in generator unit stator current-voltage measurement loop 2, measure generator frequency, and the active power of calculating generator and reactive power and power factor; Gather rectifier bridge AC side three-phase voltage and three-phase current and phase place that rectifier bridge ac-side current voltage measurement circuit 3 is introduced, and calculate the pilot angle of rectifier bridge; Gather the generator of switching value measurement loop 4 introducings and the switching value of excitation system.And the data after will calculating are sent background computer 6.
6, background computer 6
Its function is that the data that preposition sampling thief is sent here are analyzed, calculate, shown, and records ripple.
7, display device 7
Display device 7 can be selected CRT or touch-screen for use.
Its function is to carry out parameter and state demonstration, figure and curve display.
Claims (1)
1. online multifunctional monitoring device of generator excited system is characterized in that:
Include generator rotor current voltage measurement circuit (1), generator unit stator current-voltage measurement loop (2), rectifier bridge ac-side current voltage measurement circuit (3), switching value measurement loop (4), preposition sampling thief computer system (5), background computer (6) and display device (7);
Generator rotor current voltage measurement circuit (1), generator unit stator current-voltage measurement loop (2), rectifier bridge ac-side current voltage measurement circuit (3) and switching value are measured loop (4) and are connected with preposition sampling thief computer system (5) respectively; Be connected successively before and after preposition sampling thief computer system (5), background computer (6) and the display device (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202177268U CN201740855U (en) | 2010-06-01 | 2010-06-01 | On-line multifunctional monitoring device of generator excited system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202177268U CN201740855U (en) | 2010-06-01 | 2010-06-01 | On-line multifunctional monitoring device of generator excited system |
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| CN201740855U true CN201740855U (en) | 2011-02-09 |
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| CN2010202177268U Expired - Lifetime CN201740855U (en) | 2010-06-01 | 2010-06-01 | On-line multifunctional monitoring device of generator excited system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103887768A (en) * | 2014-04-09 | 2014-06-25 | 南京保合太和电力科技有限公司 | Excitation system rectifier bridge differential protection method and system |
| WO2015090020A1 (en) * | 2013-12-18 | 2015-06-25 | 国电南瑞科技股份有限公司 | System and method for on-site test of excitation device |
| CN105116873A (en) * | 2015-07-15 | 2015-12-02 | 贵州电力试验研究院 | Heat-engine plant multi-automatic adjusting loop evaluation diagnosis method |
| CN105137145A (en) * | 2014-06-05 | 2015-12-09 | 国网山西省电力公司电力科学研究院 | High precision anti-interference wave recorder |
| CN106338689A (en) * | 2016-08-26 | 2017-01-18 | 国电南瑞科技股份有限公司 | Self-check method for running state of synchronous motor excitation system |
| CN108931702A (en) * | 2018-06-05 | 2018-12-04 | 中国大唐集团科学技术研究院有限公司华中分公司 | A kind of excitation system low current test abnormality method of discrimination |
-
2010
- 2010-06-01 CN CN2010202177268U patent/CN201740855U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015090020A1 (en) * | 2013-12-18 | 2015-06-25 | 国电南瑞科技股份有限公司 | System and method for on-site test of excitation device |
| CN103887768A (en) * | 2014-04-09 | 2014-06-25 | 南京保合太和电力科技有限公司 | Excitation system rectifier bridge differential protection method and system |
| CN103887768B (en) * | 2014-04-09 | 2016-07-06 | 南京保合太和电力科技有限公司 | Excitation system rectifier bridge differential protecting method and system |
| CN105137145A (en) * | 2014-06-05 | 2015-12-09 | 国网山西省电力公司电力科学研究院 | High precision anti-interference wave recorder |
| CN105116873A (en) * | 2015-07-15 | 2015-12-02 | 贵州电力试验研究院 | Heat-engine plant multi-automatic adjusting loop evaluation diagnosis method |
| CN106338689A (en) * | 2016-08-26 | 2017-01-18 | 国电南瑞科技股份有限公司 | Self-check method for running state of synchronous motor excitation system |
| CN106338689B (en) * | 2016-08-26 | 2018-11-30 | 国电南瑞科技股份有限公司 | A kind of synchronous motor excitation system operating status self checking method |
| CN108931702A (en) * | 2018-06-05 | 2018-12-04 | 中国大唐集团科学技术研究院有限公司华中分公司 | A kind of excitation system low current test abnormality method of discrimination |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE ELECTRIC NET CROP. Effective date: 20121025 Owner name: ELECTRIC POWER RESEARCH INSTITUTE, HUBEI ELECTRIC Free format text: FORMER OWNER: HUBEI PROV. POWER TEST INST. Effective date: 20121025 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20121025 Address after: 430077, 361 East Main Street, Wuchang District, Hubei, Wuhan Patentee after: Hubei Electric Power Research Institute of Power Company Patentee after: State Grid Corporation of China Address before: 430077 Hubei city of Wuhan province Wuchang Xudong Avenue No. 361 Patentee before: Hubei Prov. Power Test Inst. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110209 |