CN101571574B - Current measuring system for rotor damping winding of hydraulic generator - Google Patents
Current measuring system for rotor damping winding of hydraulic generator Download PDFInfo
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- CN101571574B CN101571574B CN2009100722577A CN200910072257A CN101571574B CN 101571574 B CN101571574 B CN 101571574B CN 2009100722577 A CN2009100722577 A CN 2009100722577A CN 200910072257 A CN200910072257 A CN 200910072257A CN 101571574 B CN101571574 B CN 101571574B
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Abstract
The invention discloses a current measuring system for a rotor damping winding of a hydraulic generator. A hall current sensor is sleeved on a damping bar at the damping winding end part of a generator to be measured, and the output signal of the hall current sensor is connected to the signal input end of a multi-channel high-speed wireless data collecting and communicating device which is installed on the central body of a generator rotor through a leading wire; the data collection, transmission and reception of the current signal of the damping winding are realized by a host computer on which a wireless communication network card is installed through a wireless data collecting and communicating system controlled by a wireless LAN. The invention realizes the direct, reliable and accurate measurement of the damping winding current of the hydraulic generator rotor, and changes the original condition that the parameters of accurate damping winding current cannot be obtained in a long time. The invention is extremely favorable to the optimized design of a generator rotor structure and the development of a new product, and makes the on-line monitoring of the damping winding current of the hydraulic generator possible at the same time.
Description
Technical field
The present invention relates to a kind of current measuring system for rotor damping winding of hydraulic generator.
Background technology
Damping winding is an ingredient in the hydraulic generator rotor structure.The hydraulic generator unit is in operational process; If load unstable or take place that unexpected variation, field regulator or speed regulator break down and hydraulic turbine torque inhomogeneous etc.; All possibly cause hydrogenerator to produce vibration; In the oscillatory process, the rotating speed of generator, voltage, electric current, power and torque etc. all can the variations of generating period property, when serious hydrogenerator and electric system lost and cause compressor emergency shutdown or more serious accident synchronously.Damping winding is set on the hydraulic generator rotor can suppresses this oscillatory occurences effectively, improve the stability of Operation of Electric Systems; Damping winding is born asymmetric load or is taken place at generator and can also weaken effectively and over-voltage, to avoid the generation of catastrophic failure under the situation of unsymmetrical short-circuit simultaneously.The induction current in the damping winding and the regularity of distribution of electric current are the key factors of decision damping winding design proposal.At present, the measurement to the damping winding electric current does not still have ripe method.Damping winding is positioned at the hydraulic generator rotor pole surface; Complex structure; And rotor is in rotary state; Electric current composition in the damping winding is also very complicated, brings great difficulty for the measurement of damping winding electric current, thereby the damping winding electric current is considered to a parameter that can't realize directly accurately measuring always.Up to the present; Only there is only a few to measure the damping winding method of current indirectly; The common feature of these methods is in measuring process, to have introduced more calculating, because the electromagnetic field in the motor is non-linear and distributivity, this calculating will be introduced the error of calculation that is difficult to overcome.When adopting the signal slip ring that the signal of rotating part is drawn, introduce the contact error of slip ring etc. again inevitably.
Summary of the invention
The invention provides a kind of through direct, the reliable and accurate current measuring system for rotor damping winding of hydraulic generator of technology realization such as adopt that advanced means of testing is communicated by letter with modern network.The present invention realizes through following technical scheme: a kind of current measuring system for rotor damping winding of hydraulic generator is sleeved on Hall current sensor on the amortisseur bar of tested generator damping winding end; Multi-channel high-speed data acquisition and communicator and DC/DC power module are mounted and fixed on the generator amature centrosome as far as possible on the position near the axle center, the output signal of Hall current sensor are connected to the signal input part of multi-channel high-speed data acquisition and communicator through signal lead; The field voltage leading-out terminal on the generator amature is connected to the input end of DC/DC power module through power supply lead wire; The voltage output end of DC/DC power module is connected respectively to the power input of each Hall current sensor and multi-channel high-speed data acquisition and communicator through power supply lead wire; The wireless communication networks cartoon is crossed the USB USB to be connected with host computer; The host computer of TT&C application software has been installed; Through WLAN control data acquisition and communication system, realize data acquisition, transmission and reception to the damping winding current signal.
The present invention has realized directly, the reliably and accurately measurement to hydraulic generator rotor damping winding electric current, has changed to obtain original situation of damping winding current parameters accurately for a long time always.The present invention has avoided adopting in the past and has measured the various errors that the damping winding method of current causes or introduces indirectly.The novel Hall current sensor that adopts among the present invention is based on the magnetic potential balance principle; And bandwidth is 100kHz; Thereby the damping winding current signal that has guaranteed sensor output can not produce distortion, has promptly fundamentally guaranteed the accuracy and the precision of damping winding current measurement; Realize data acquisition, transmission and reception through employing wireless LAN communication technology among the present invention to the damping winding current signal; The contact error of having been introduced when not only having avoided adopting the signal slip ring that the signal of rotating part is drawn; And should technology having that transmission speed is fast, the characteristics of long transmission distance than other wireless communication technology, the real-time that has satisfied the signal transmission requires and than the requirement of long-distance transmissions.The power supply that is installed in each device on the generator amature among the present invention is taken from the field voltage on the generator amature, and for each device provides reliable and continual power supply, this makes the on-line monitoring of generator damping winding electric current become possibility.Achievement of the present invention helps the optimal design of generator rotor structure and the exploitation of new product very much.
Description of drawings
Fig. 1 is the present invention's each Unit Installation structural representation on generator amature
Fig. 2 is a system architecture theory diagram of the present invention
Embodiment
A kind of current measuring system for rotor damping winding of hydraulic generator as shown in Figure 1 is sleeved on TBC200EH type Hall current sensor 1 on the amortisseur bar 3 of tested generator amature 2 damping winding ends; NI WLS-9215 type multi-channel high-speed data acquisition and communicator 4 and MHM28D05 type DC/DC power module 5 are mounted and fixed on generator amature 1 centrosome as far as possible on the position near the axle center; As shown in Figure 2, the output signal of TBC200EH type Hall current sensor 1 is connected to the signal input part of NIWLS-9215 type multi-channel high-speed data acquisition and communicator 4 through signal lead 6; The field voltage leading-out terminal 8 on the generator amature 2 is connected to the input end of MHM28D05 type DC/DC power module 5 through power supply lead wire 7; The voltage output end of MHM28D05 type DC/DC power module 5 is connected respectively to the power input of each TBC200EH type Hall current sensor 1 and NI WLS-9215 type multi-channel high-speed data acquisition and communicator 4 through power supply lead wire 7; DL-Link DWA-140 type wireless communication networks cartoon is crossed the USB USB to be connected with host computer; The host computer of TT&C application software has been installed; Through WLAN control data acquisition and communication system, realize data acquisition, transmission and reception to the damping winding current signal.Measuring system of the present invention has adopted the wireless LAN communication technology based on the Wi-Fi standard; The employed frequency of operation of this wireless transmission technology is 2.4GHz; When WLS-9215 type multi-channel high-speed data acquisition and the communicator 4 of host computer on generator amature sends the instruction that requires image data and transmission data; Or WLS-9215 type multi-channel high-speed data acquisition and communicator 4 send in the data procedures that collects to host computer; Want earlier analog signal conversion to be become digital signal; And then the digital signal after will changing again is modulated into and satisfies the digital signal that communication protocol requires, then through (being WLS-9215 type multi-channel high-speed data acquisition and communicator and DL-Link DWA-140 type radio communication network interface card) the separately built-in wireless transmit and the transmission and the reception of this digital signal of receiving trap completion.
The present invention has realized directly, the reliably and accurately measurement to hydraulic generator rotor damping winding electric current, has changed to obtain original situation of damping winding current parameters accurately for a long time always; The optimal design and the new product development that can be generator rotor structure provide important scientific basis, simultaneously, also make the on-line monitoring of hydrogenerator damping winding electric current become possibility.
Claims (1)
1. a current measuring system for rotor damping winding of hydraulic generator is characterized in that: Hall current sensor (1) is sleeved on the amortisseur bar (3) of tested generator amature (2) damping winding end; Multi-channel high-speed data acquisition and communicator (4) and DC/DC power module (5) are mounted and fixed on generator amature (2) centrosome as far as possible on the position near the axle center, the output signal of Hall current sensor (1) are connected to the signal input part of multi-channel high-speed data acquisition and communicator (4) through signal lead (6); The field voltage leading-out terminal (8) on the generator amature is connected to the input end of DC/DC power module (5) through power supply lead wire (7); The voltage output end of DC/DC power module (5) is connected respectively to the power input of each Hall current sensor (1) and multi-channel high-speed data acquisition and communicator (4) through power supply lead wire (7); The wireless communication networks cartoon is crossed the USB USB to be connected with host computer; The host computer of TT&C application software has been installed; Through WLAN control data acquisition and communication system, realize data acquisition, transmission and reception to the damping winding current signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100722577A CN101571574B (en) | 2009-06-12 | 2009-06-12 | Current measuring system for rotor damping winding of hydraulic generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100722577A CN101571574B (en) | 2009-06-12 | 2009-06-12 | Current measuring system for rotor damping winding of hydraulic generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101571574A CN101571574A (en) | 2009-11-04 |
| CN101571574B true CN101571574B (en) | 2012-04-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100722577A Active CN101571574B (en) | 2009-06-12 | 2009-06-12 | Current measuring system for rotor damping winding of hydraulic generator |
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| CN (1) | CN101571574B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102088205A (en) * | 2009-12-07 | 2011-06-08 | 河南省电力公司许昌供电公司 | Communication network card for protecting and monitoring device |
| CN102169136B (en) * | 2010-02-26 | 2013-07-10 | 马铭远 | Method and system for monitoring brush current of generator on line |
| CN101819257B (en) * | 2010-05-19 | 2012-06-20 | 丰满发电厂 | Generator rotor parameter measuring device |
| CN102967385A (en) * | 2012-05-24 | 2013-03-13 | 哈尔滨电机厂有限责任公司 | Rotor coil temperature measuring instrument for hydro-generator |
| CN107040097A (en) * | 2017-05-05 | 2017-08-11 | 哈尔滨理工大学 | A kind of generator motor that sliver defect inspection is damped with rotor |
| CN112881911B (en) * | 2021-01-27 | 2022-09-09 | 哈动国家水力发电设备工程技术研究中心有限公司 | Variable-speed double-fed motor testing device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2244265Y (en) * | 1995-09-26 | 1997-01-01 | 刘群利 | Three phase ac. generator |
| JP2003271234A (en) * | 2002-03-13 | 2003-09-26 | Mitsubishi Electric Corp | Condition remote monitor system |
| CN2624363Y (en) * | 2002-12-30 | 2004-07-07 | 东方电机控制设备有限公司 | Shaft urrent transformer |
-
2009
- 2009-06-12 CN CN2009100722577A patent/CN101571574B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2244265Y (en) * | 1995-09-26 | 1997-01-01 | 刘群利 | Three phase ac. generator |
| JP2003271234A (en) * | 2002-03-13 | 2003-09-26 | Mitsubishi Electric Corp | Condition remote monitor system |
| CN2624363Y (en) * | 2002-12-30 | 2004-07-07 | 东方电机控制设备有限公司 | Shaft urrent transformer |
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| Publication number | Publication date |
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| CN101571574A (en) | 2009-11-04 |
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