CN203312767U - Generator protecting device - Google Patents
Generator protecting device Download PDFInfo
- Publication number
- CN203312767U CN203312767U CN2013204034031U CN201320403403U CN203312767U CN 203312767 U CN203312767 U CN 203312767U CN 2013204034031 U CN2013204034031 U CN 2013204034031U CN 201320403403 U CN201320403403 U CN 201320403403U CN 203312767 U CN203312767 U CN 203312767U
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- generator
- protection
- unit
- rotor
- earth fault
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Abstract
The utility model discloses a generator protecting device. The generator protecting device comprises a rotator ground protection unit (10), a relay (201) and a hand switch valve (301), wherein the rotator ground protection unit is connected with the negative electrode of a rotator winding of a generator and to the ground and is used for generating a protection action signal; the relay is connected with the rotator ground protection unit (10) and used for switching on an alarm circuit (401) based on the protection action signal; and one end of the hand switch valve is connected with the rotator ground protection unit (10), the other end of the hand switch valve is connected with an excitation unit (501) and the hand switch valve is used for controlling the stop of the generator. According to the utility model, the rotator ground protection unit is used for generating the protection action signal and the relay is used for switching on the alarm circuit based on the protection action signal, so online detection protection is performed when an alarm occurs; when the stop is needed during detection, the hand switch valve can be used for turning off the excitation unit and stopping the generator to run; and the generator protecting device is easy to use.
Description
Technical field
The utility model relates to the technical field of generator protection, more particularly, relates to a kind of protection equipment for generator.
Background technology
The safe operation of generator plays conclusive effect to normal operation and the quality of power supply that guarantees electric power system; generator itself is also a very valuable generating equipment simultaneously; therefore; usually for various fault and irregular operating state, install the protective relaying device of perfect performance.Common protection equipment for generator is exactly a kind of common protective relaying device.
At present, the protection equipment for generator of nuclear energy power generation, by between rotor winding and the earth, injecting low-voltage ac signal, carry out rotor insulation against ground detection, and protection comprises 2 sections definite values, and the first stage refers to that earth resistance moves in signal while being not more than 4k Ω; Second stage refers to that earth resistance moves in sequential trip while being not more than 2k Ω, now by transformer unit, protects the tripping high-voltage switch gear, ends the operation of generator.But the practice in for various reasons; for example; if the rotor earth fault protection brush can not lift when measuring; two measurement brushes can form closed-loop path by brush holder, because brush holder is ground connection, will directly trigger two sections trip signals of generator amature one point earth; now the rotor loop insulation resistance is not down to predetermined value; therefore cause unnecessary shutdown, end the normal operation of generator, had a strong impact on generator normal power generation and the quality of power supply.
The utility model content
The technical problems to be solved in the utility model is; above-mentioned protective device for prior art often triggers trip signal because of misoperation; cause that generator shuts down suddenly; have a strong impact on the defect of normal power generation and the quality of power supply; a kind of protection equipment for generator is provided; can avoid unnecessary shutdown, the systems stabilisation quality of power supply.
The technical scheme that its technical problem that solves the utility model adopts is:
A kind of protection equipment for generator, is characterized in that, comprising: with generator amature winding negative pole, be connected with ground, for generation of the rotor earth fault protection unit of protection actuating signal;
With described rotor earth fault protection unit, be connected, according to the protection actuating signal, connect the relay of warning circuit; And
One end is connected with described rotor earth fault protection unit, and the other end is connected with the excitation unit, be used to controlling the manual switch valve of generator outage.
In protection equipment for generator of the present utility model, described rotor earth fault protection unit adopts and exchanges pouring-in rotor earth fault protection, comprise: measuring unit, for the voltage and current of Measurement and analysis from the loop that main insulation forms of the alternating current component process generator amature of rotor winding injection;
With described measuring unit, be connected, the voltage and current of described measuring unit measurement analyzed, calculated to the master controller of rotor winding insulation against ground value output protection actuating signal;
Wherein, described master controller is connected with described manual switch valve with described relay respectively.
In protection equipment for generator of the present utility model, described rotor earth fault protection unit also comprises with described master controller and being connected, and shows detailed fault and the monitoring means of type of alarm.
Implement protection equipment for generator of the present utility model, has following beneficial effect: by adding manual switch valve, avoided causing that because of misoperation and some other reasonses rotor earth fault protection unit triggers trip signal affects generator normal power generation and the quality of power supply; By realizing warning function, when hearing warning, carry out scene and detect online and take corresponding measure; according to detection case, when needs are shut down, turn-off the excitation unit by manual switch valve, end the operation of generator; avoid and reduced unnecessary shutdown, having stablized the system power quality.
The accompanying drawing explanation
The utility model is described in further detail below in conjunction with drawings and Examples, in accompanying drawing:
Fig. 1 is the structural representation of the utility model protection equipment for generator embodiment;
Fig. 2 is the structural representation of measuring unit in Fig. 1;
Fig. 3 is the principle schematic of measuring unit in Fig. 1.
Embodiment
For technical characterictic of the present utility model, purpose and effect being had more clearly, understand, now contrast accompanying drawing and describe embodiment of the present utility model in detail.
As shown in Figure 1, in the structural representation of the utility model protection equipment for generator embodiment, for convenience of explanation, only show the part relevant to the utility model.
The protection equipment for generator that the utility model embodiment provides in Fig. 1 comprises rotor earth fault protection unit 10, relay 201, warning circuit 401, manual switch valve 301 and excitation unit 501.Ground protection unit 10 is connected with ground with generator amature winding negative pole, for generation of the protection actuating signal; Relay 201 is connected with rotor earth fault protection unit 10, for according to the protection actuating signal, connecting warning circuit 401; Manual switch valve 301 1 ends are connected with rotor earth fault protection unit 10, the other end is connected with excitation unit 501, for manually controlling generator outage, what wherein rotor earth fault protection unit 10 adopted is to exchange pouring-in rotor earth fault protection, comprise measuring unit 101, master controller 102 and monitoring means 103, measuring unit 101 is by between rotor winding and the earth, injecting low-voltage alternating current power supply, from the voltage and current of rotor winding Measurement and analysis injected frequency; The voltage and current that 102 pairs of measuring units of master controller 101 are measured is analyzed, and calculates rotor winding insulation against ground value output protection actuating signal; Monitoring means 103 is connected with master controller 102, shows detailed fault and type of alarm.Hearing while reporting to the police, carrying out that scene is online to be detected, can autostop in running, but according to detection case, by manual switch valve 301, turn-off excitation unit 501 when needs are shut down, the operation of termination generator.
Fig. 2 and Fig. 3 are respectively structural representation and the principle schematic of measuring unit 101 in rotor earth fault protection unit 10; additional 40V between a 3A and 4A; the AC power of 50Hz; ((resistance-capacitance network of R01～R08) be connected in parallel injects the low-voltage ac voltage signal to rotor loop for C01～C08) and resistance by resistance R 1～R4 and by 8 groups of electric capacity; being injected between rotor winding negative pole and ground of this voltage signal symmetry, measure alternating voltage U over the ground
AWith loop current I
A.
After by measuring unit 101, measuring alternating voltage and loop current over the ground, calculate the impedance over the ground of rotor winding by master controller 102, by certain compensation, and then calculate rotor winding resistance to earth R
fWhen rotor winding resistance to earth is not more than 4k Ω; namely arrive one section definite value of generator rotor one-point grounding protection; now master controller 102 sends the protection actuating signal; by relay 201, connect warning circuit; and in monitoring means 103, show detailed fault and type of alarm, can overview alarm whether be the spurious alarm that the measuring circuit fault causes.Because the rotor one point earth appears in generator; do not form circuit loop; the fault point no current passes through; to generator itself, can not cause damage in a short time; when occurring reporting to the police; carry out the online detection in scene, according to detection case, by manual switch valve, end again the operation of generator when needs are shut down.
The above is described embodiment of the present utility model by reference to the accompanying drawings; but the utility model is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; rather than restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; not breaking away from the scope situation that the utility model aim and claim protect, also can make a lot of forms, within these all belong to protection of the present utility model.
Claims (3)
1. a protection equipment for generator, is characterized in that, comprising: with generator amature winding negative pole, be connected with ground, for generation of the rotor earth fault protection unit (10) of protection actuating signal;
With described rotor earth fault protection unit (10), be connected, according to the protection actuating signal, connect the relay (201) of warning circuit (401); And
One end is connected with described rotor earth fault protection unit (10), and the other end is connected with excitation unit (501), the manual switch valve (301) be used to controlling generator outage.
2. a kind of protection equipment for generator according to claim 1, it is characterized in that, described rotor earth fault protection unit (10) adopts and exchanges pouring-in rotor earth fault protection, comprise: measuring unit (101), for the voltage and current of Measurement and analysis from the loop that main insulation forms of the alternating current component process generator amature of rotor winding injection;
With described measuring unit (101), be connected, the voltage and current of described measuring unit (101) measurement analyzed, calculated to the master controller (102) of rotor winding insulation against ground value output protection actuating signal;
Wherein, described master controller (102) is connected with described manual switch valve (301) with described relay (201) respectively.
3. a kind of protection equipment for generator according to claim 2, is characterized in that, described rotor earth fault protection unit (10) also comprises with described master controller (102) and being connected, and shows the monitoring means (103) of detailed fault and type of alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204034031U CN203312767U (en) | 2013-07-08 | 2013-07-08 | Generator protecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204034031U CN203312767U (en) | 2013-07-08 | 2013-07-08 | Generator protecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203312767U true CN203312767U (en) | 2013-11-27 |
Family
ID=49618942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013204034031U Expired - Lifetime CN203312767U (en) | 2013-07-08 | 2013-07-08 | Generator protecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203312767U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111509669A (en) * | 2020-05-08 | 2020-08-07 | 国网山东省电力公司电力科学研究院 | Rotor current protection method and system for synchronous phase modulator |
-
2013
- 2013-07-08 CN CN2013204034031U patent/CN203312767U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111509669A (en) * | 2020-05-08 | 2020-08-07 | 国网山东省电力公司电力科学研究院 | Rotor current protection method and system for synchronous phase modulator |
| CN111509669B (en) * | 2020-05-08 | 2022-04-08 | 国网山东省电力公司电力科学研究院 | Rotor current protection method and system for synchronous phase modulator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131127 |