CN215116734U - Generator transformer trouble record ripples device - Google Patents
Generator transformer trouble record ripples device Download PDFInfo
- Publication number
- CN215116734U CN215116734U CN202120682561.XU CN202120682561U CN215116734U CN 215116734 U CN215116734 U CN 215116734U CN 202120682561 U CN202120682561 U CN 202120682561U CN 215116734 U CN215116734 U CN 215116734U
- Authority
- CN
- China
- Prior art keywords
- voltage
- direct
- resistance plate
- power supply
- generator transformer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model discloses a generator transformer fault recorder, which comprises a direct current control power supply, a voltage to earth acquisition module, a generator transformer fault recorder and a working grounding device; the voltage-to-ground acquisition module is connected with the work grounding device and the direct-current control power supply lead, and the voltage-to-ground acquisition module is connected with the generator transformer fault recorder lead. The problem that the fault wave recording device of the microcomputer type generator transformer is not connected with the direct current voltage to ground is solved. The direct-current system grounding alarm caused when the direct-current control power supply to ground voltage acquisition module is connected into a direct-current to ground voltage loop is avoided, and the technical performance and the fault analysis parameters of the generator transformer fault recording device are improved.
Description
Technical Field
The utility model relates to an electric power detects technical field, especially relates to a generator transformer trouble recorder.
Background
The dc system provides reliable dc power for control, signal, relay protection, automation, emergency lighting, etc. in power plants (substations), and provides reliable operating power for operation. The reliability of the direct current system plays an important role in the safe operation of the power plant (substation), and is an important guarantee condition for the safe operation of the power plant (substation). In the international 'technical requirement for transformer fault recorder of GB/T14598.301-2010 microcomputer type generator' 4.7.1.3 article, "the generator transformer fault recorder is required to monitor dc quantities, which are used to record the voltages of positive and negative electrodes of dc control power supplies of power plants and substations to ground, the voltage/current of a generator rotor, the voltage/current of a main exciter rotor, and the like. "
At present, only the voltage/current of a generator rotor and the voltage of a direct current bus are generally accessed in the fault recording device of a microcomputer type generator transformer in a power plant (transformer substation), and most of the voltage to ground of the positive electrode and the negative electrode of a direct current control power supply is not accessed in the fault recording device of the microcomputer type generator transformer, so that the analysis and judgment of the relay protection refusal and the malfunction fault caused by the short circuit and the grounding of the direct current control power supply are not accurate, and the analysis and the judgment of the change of the voltage to ground of the direct current control power supply during the relay protection fault are not facilitated.
There is chinese patent publication No. CN111679653A, publication No. 2020.09.18, which discloses an intelligent fault recording device and a dc field control loop fault positioning method, including: an analysis processing module; the input module is connected with the analysis processing module; the alarm module is connected with the analysis processing module; the input module comprises an opening/closing signal input module, a linkage signal input module, an intermediate relay node position signal input module, a switch/disconnecting link position signal input module and a high-voltage bus voltage/current signal input module; the analysis processing module comprises a control loop associated signal configuration module and an operation module; the fault of the DC field control loop can be more conveniently and quickly positioned.
In addition, chinese patent publication No. CN209927945U, publication No. 2020.01.10, discloses a fault recording apparatus for a dc system, which includes a recording storage unit, a sample-and-hold unit, and a filtering and energy-storing circuit, wherein a power input end of the recording storage unit is connected to a power supply apparatus through the filtering and energy-storing circuit, a first interface of the recording storage unit is connected to an output end of the power supply apparatus, a second interface of the recording storage unit is connected to a first interface of the sample-and-hold unit, the sample-and-hold unit is connected to an apparatus for supplying power to the sample-and-hold unit through another filtering and energy-storing circuit, and the filtering and energy-storing circuit is connected to a dc bus and an output end of a charger through a plurality of detection circuits. Through the scheme, the problem that most of the conventional online monitoring equipment has no fault wave recording function or the wave recording function is influenced by the power supply and cannot ensure the integrity can be effectively solved. The circuit structure is simple and the cost is low.
The above patent application has the following drawbacks: one is that the voltage to ground of a direct current control power supply of the generator transformer fault recording device is not collected; the other is that the direct current control power supply has no insulation enhancement to the ground voltage acquisition module (element), and when the direct current control power supply is connected to the ground voltage acquisition module (element), the direct current system is easy to generate a ground alarm.
SUMMERY OF THE UTILITY MODEL
In order to overcome prior art's defect, the utility model provides a generator transformer trouble record ripples device, its purpose generator transformer trouble record ripples device inserts direct current control power supply and records ripples volume to the ground voltage, when being convenient for relay protection, operation, control circuit trouble, looks over the direct current control power supply and to the ground voltage situation of change, whether analysis direct current control power supply takes place direct current ground connection or short circuit when relay protection, operation, control circuit trouble.
In order to solve the technical problem, the utility model discloses a technical scheme is:
the utility model provides a generator transformer trouble oscillograph, includes direct current control power, work earthing device and generator transformer trouble oscillograph, its characterized in that: the voltage-to-ground acquisition module comprises a first voltage-dividing resistance plate, a second voltage-dividing resistance plate, a first direct-current voltage transmitter, a second direct-current voltage transmitter and a 24V switching power supply, wherein the anode of the direct-current control power supply and a working grounding device are respectively and electrically connected with the first voltage-dividing resistance plate, and the first direct-current voltage transmitter is respectively and electrically connected with the first voltage-dividing resistance plate and a generator transformer fault recorder; the negative electrode of the direct current control power supply and the working grounding device are respectively and electrically connected with the second voltage division resistance plate, and the second direct current voltage transmitter is respectively and electrically connected with the second voltage division resistance plate and the generator transformer fault recorder; the 24V switching power supply is electrically connected with the first direct-current voltage transmitter and the second direct-current voltage transmitter respectively. Collecting the voltage to ground of a direct current control power supply by using a voltage dividing resistance plate and a direct current voltage transmitter, converting the collected direct current voltage to ground by the direct current voltage transmitter into 4-20mA analog quantity and uploading the analog quantity to a generator transformer fault recorder, setting a high/low limit starting value and a sudden change starting value of the recorded direct current voltage to ground in the generator transformer fault recorder, and continuously monitoring the voltage to ground of the direct current control power supply by the generator transformer fault recorder and starting recording when the voltage is high or low or the sudden change value; the direct-current control power supply is connected to the ground voltage recording quantity at the generator transformer fault recording device, so that the change condition of the ground voltage of the direct-current control power supply can be checked when the relay protection, operation and control circuit has faults, and whether direct-current grounding or short circuit occurs when the relay protection, operation and control circuit has faults or not is analyzed.
Preferably, the positive electrode of the direct-current control power supply and the working grounding device are respectively connected to the input end of the first voltage-dividing resistance plate, the input end of the first direct-current voltage transmitter is connected with the output end of the first voltage-dividing resistance plate, and the output end of the first direct-current voltage transmitter is connected with the fault recorder of the generator transformer; the negative electrode of the direct current control power supply and the working grounding device are respectively connected to the input end of the second voltage division resistance plate, the input end of the second direct current voltage transmitter is connected with the output end of the second voltage division resistance plate, and the output end of the second direct current voltage transmitter is connected with the fault recorder of the generator transformer;
the first direct-current voltage transmitter converts the low voltage output by the first voltage-dividing resistor plate into an analog quantity signal of 4-20 mA; and the second direct-current voltage transmitter converts the low voltage output by the second voltage-dividing resistor plate into an analog quantity signal of 4-20 mA.
Furthermore, the first voltage division resistance plate and the second voltage division resistance plate are respectively composed of a series resistor, a parallel resistor and a capacitor. The resistance value of the series resistor is 1.64M omega, the resistance value of the parallel resistor is 166 omega, and the capacitance is 2.2 mu F.
Further, the work grounding device comprises a grounding copper bar and a fuse. The work grounding device, the first voltage division resistance plate, the second voltage division resistance plate, the first direct-current voltage transmitter, the second direct-current voltage transmitter and the 24V switching power supply are arranged in the direct-current screen.
The utility model has the advantages of it is following:
the utility model discloses a direct current control power supply is to ground voltage collection module comprises direct current voltage changer, partial pressure resistance board, work earthing device, and the partial pressure resistance board of high resistance can make direct current to ground voltage measurement circuit not take place ground connection and report an emergency and ask for help or increased vigilance; the grounding device consists of a grounding copper bar and a series-connected fuse, so that the influence on the safe operation of the generator transformer fault recording device when the direct-current voltage-to-ground voltage measuring circuit fails is avoided; through the utility model discloses the method can insert the direct current control power supply to ground voltage to generator transformer trouble record ripples device through several simple components, has improved generator transformer trouble record ripples device technical performance and failure analysis parameter.
Drawings
Fig. 1 is a block diagram of the present invention.
The labels in the figure are: 1. the device comprises a direct current control power supply, a 1.1 positive pole, a 1.2 negative pole, a 2 working grounding device, a 3 first voltage division resistance plate, a 4 second voltage division resistance plate, a 5 first direct current voltage transmitter, a 6 second direct current voltage transmitter, a 7 generator transformer fault recorder and an 8 and 24V switching power supply.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to the following examples, which are conventional unless otherwise specified, and the materials can be commercially obtained from the disclosure without further specification.
A generator transformer fault recorder is shown in figure 1 and comprises a direct current control power supply 1, a working grounding device 2, a generator transformer fault recorder 7 and a ground voltage acquisition module, wherein the ground voltage acquisition module comprises a first voltage division resistance plate 3, a second voltage division resistance plate 4, a first direct current voltage transmitter 5, a second direct current voltage transmitter 6 and a 24V switching power supply 8, an anode 1.1 of the direct current control power supply 1 and the working grounding device 2 are respectively and electrically connected with the first voltage division resistance plate 3, and the first direct current voltage transmitter 5 is respectively and electrically connected with the first voltage division resistance plate 3 and the generator transformer fault recorder 7; the negative electrode 1.2 of the direct current control power supply 1 and the working grounding device 2 are respectively and electrically connected with the second voltage division resistance plate 4, and the second direct current voltage transmitter 6 is respectively and electrically connected with the second voltage division resistance plate 4 and the generator transformer fault recorder 7; the 24V switching power supply 8 is electrically connected with the first direct current voltage transducer 5 and the second direct current voltage transducer 6 respectively. The 24V switching power supply 8 supplies operating power to the first dc voltage transmitter 5 and the second dc voltage transmitter 6.
The positive electrode 1.1 of the direct-current control power supply and the working grounding device 2 are respectively connected to the input end of the first voltage-dividing resistor plate 3, the input end of the first direct-current voltage transmitter 5 is connected with the output end of the first voltage-dividing resistor plate 3, and the output end of the first direct-current voltage transmitter 5 is connected with the generator transformer fault recorder 7; the negative electrode 1.2 of the direct current control power supply and the working grounding device 2 are respectively connected to the input end of the second voltage-dividing resistor plate 4, the input end of the second direct current voltage transmitter 6 is connected with the output end of the second voltage-dividing resistor plate 4, and the output end of the second direct current voltage transmitter 6 is connected with the generator transformer fault recorder 7.
The first voltage division resistance plate and the second voltage division resistance plate are composed of series resistors, parallel resistors and capacitors. The resistance value of the series resistor is 1.64M omega, the resistance value of the parallel resistor is 166 omega, and the capacitance is 2.2 mu F.
When the direct current system is connected to the ground, the grounding resistance is smaller than 30 kilomega to cause grounding alarm of a direct current system insulation monitoring device, the first voltage division resistance plate 3 enables the direct current single phase to be in voltage reduction, and the resistance of a measuring loop is increased and high-frequency noise of an input end is filtered; the model selection specification parameter of the first direct current voltage transmitter 5 is 0-30V/4-20mA, double voltage allowance is kept, and the first direct current voltage transmitter 5 is prevented from being burnt out when the first voltage division resistance plate 3 fails; the working grounding device 2 comprises a grounding copper bar and a fuse connected in series, and the fuse can be fused when the direct-current voltage-to-ground measurement circuit fails so as to protect a measurement circuit instrument; the first voltage division resistance plate 3 is connected with the anode 1.1 of the direct current control power supply and the working grounding device 3 through leads; the input end of the first direct-current voltage transmitter 5 is connected with the output end of the first voltage division resistance plate 3 through a lead, and the first direct-current voltage transmitter 5 converts the direct-current voltage-to-ground voltage passing through the first voltage division resistance plate 3 into 4-50mA analog quantity for the generator transformer fault recorder 7 to use; the generator transformer fault recorder 7 is characterized in that a direct-current analog quantity input end is connected with an output end of the first direct-current voltage transmitter 5 through a lead, the generator transformer fault recorder 7 displays a sampling value of the direct-current control power supply positive electrode ground voltage on the generator transformer fault recorder 7 according to a direct-current control power supply positive electrode ground voltage input value provided by the first direct-current voltage transmitter 5, meanwhile, a direct-current control power supply positive electrode ground voltage high/low limit starting value and a sudden change starting value are set in a fixed value of the generator transformer fault recorder 7, the generator transformer fault recorder continuously monitors the direct-current control power supply positive electrode ground voltage, and starts wave recording when the direct-current control power supply positive electrode ground voltage reaches the direct-current control power supply positive electrode ground voltage high/low limit or sudden change value in the generator transformer fault recorder.
The principle of the direct-current control power supply negative electrode voltage-to-ground voltage measuring loop is the same as that of the direct-current control power supply negative electrode voltage-to-ground voltage measuring loop.
The working grounding device 2, the first voltage division resistance plate 3, the second voltage division resistance plate 4, the first direct-current voltage transmitter 5, the second direct-current voltage transmitter 6 and the 24V switching power supply 8 are arranged in the direct-current screen.
According to the first direct-current voltage transmitter 5, the second direct-current voltage transmitter 5, the first voltage dividing resistance plate 3, the second voltage dividing resistance plate 4, the generator transformer fault recorder 7, the work grounding device 2, the direct-current control power supply anode 1.1 and the direct-current control power supply cathode 1.2, the grounding voltage monitoring and recording functions of the microcomputer type generator transformer fault recorder on the direct-current control power supply anode and cathode voltage values can be achieved.
The utility model provides a generator transformer trouble oscillograph device not insert the problem of direct current control power supply to ground voltage. The direct current control power supply ground current collection module (element) is subjected to model selection and embodiment description; insulation enhancement is carried out on the direct current control power supply to ground voltage acquisition modules (elements), so that direct current system ground alarm caused when the direct current control power supply to ground voltage acquisition modules (elements) are connected into a direct current control power supply to ground voltage loop is avoided; the direct current to ground voltage acquisition mode of the fault recording device of the microcomputer type generator transformer is explained in detail.
Claims (8)
1. The utility model provides a generator transformer trouble oscillograph device, includes direct current control power supply (1), work earthing device (2) and generator transformer trouble oscillograph (7), its characterized in that: the voltage transformer further comprises a voltage acquisition module for the ground, wherein the voltage acquisition module for the ground comprises a first voltage division resistance plate (3), a second voltage division resistance plate (4), a first direct-current voltage transmitter (5), a second direct-current voltage transmitter (6) and a 24V switching power supply (8); the positive electrode (1.1) of the direct-current control power supply (1) and the working grounding device (2) are respectively and electrically connected with the first voltage division resistance plate (3), and the first direct-current voltage transmitter (5) is respectively and electrically connected with the first voltage division resistance plate (3) and the generator transformer fault recorder (7); the negative electrode (1.2) of the direct current control power supply (1) and the working grounding device (2) are respectively and electrically connected with the second voltage division resistance plate (4), and the second direct current voltage transmitter (6) is respectively and electrically connected with the second voltage division resistance plate (4) and the generator transformer fault recorder (7); the 24V switching power supply (8) is electrically connected with the first direct-current voltage transmitter (5) and the second direct-current voltage transmitter (6) respectively.
2. The generator transformer fault recording device of claim 1, wherein: the positive electrode (1.1) and the working grounding device (2) of the direct-current control power supply (1) are respectively connected to the input end of the first voltage-dividing resistance plate (3), the input end of the first direct-current voltage transducer (5) is connected with the output end of the first voltage-dividing resistance plate (3), and the output end of the first direct-current voltage transducer (5) is connected with a generator transformer fault recorder (7); the negative electrode (1.2) of the direct current control power supply (1) and the working grounding device (2) are respectively connected to the input end of the second voltage division resistance plate (4), the input end of the second direct current voltage transmitter (6) is connected with the output end of the second voltage division resistance plate (4), and the output end of the second direct current voltage transmitter (6) is connected with the generator transformer fault recorder (7);
3. the generator transformer fault recording device of claim 2, wherein: the first direct-current voltage transmitter (5) converts the low voltage output by the first voltage division resistance plate (3) into an analog quantity signal of 4-20 mA; and the second direct-current voltage transmitter (6) converts the low voltage output by the second voltage division resistance plate (4) into an analog quantity signal of 4-20 mA.
4. The generator transformer fault recording device of claim 1, wherein: the first voltage division resistance plate (3) and the second voltage division resistance plate (4) are respectively composed of series resistors, parallel resistors and capacitors.
5. The generator transformer fault recording device of claim 3, wherein: the resistance value of the series resistor is 1.64M omega, the resistance value of the parallel resistor is 166 omega, and the capacitance is 2.2 mu F.
6. The generator transformer fault recording device of claim 1, wherein: the working grounding device (2) comprises a grounding copper bar and a fuse.
7. The generator transformer fault recording device of claim 1, wherein: the working grounding device (2) is connected with a grounding grid wire of a power plant and/or a transformer substation.
8. The generator transformer fault recording device of claim 1, wherein: the working grounding device (2), the first voltage division resistance plate (3), the second voltage division resistance plate (4), the first direct-current voltage transmitter (5), the second direct-current voltage transmitter (6) and the 24V switching power supply (8) are arranged in the direct-current screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120682561.XU CN215116734U (en) | 2021-04-02 | 2021-04-02 | Generator transformer trouble record ripples device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120682561.XU CN215116734U (en) | 2021-04-02 | 2021-04-02 | Generator transformer trouble record ripples device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215116734U true CN215116734U (en) | 2021-12-10 |
Family
ID=79346918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120682561.XU Active CN215116734U (en) | 2021-04-02 | 2021-04-02 | Generator transformer trouble record ripples device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215116734U (en) |
-
2021
- 2021-04-02 CN CN202120682561.XU patent/CN215116734U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1908681B (en) | Over-voltage monitoring sensor for AD electricity system | |
| CN201611384U (en) | Motor status monitoring and failure diagnosis system | |
| CN109828177B (en) | Fault wave recording device of direct current system | |
| CN201637803U (en) | Portable failure data recorder | |
| CN213986651U (en) | Multi-state online monitoring system for lightning arrester | |
| CN101316050A (en) | Method and device for monitoring running state of transforming station direct current system | |
| CN106168638A (en) | A kind of method utilizing protective relaying device to realize high-voltage parallel capacitor on-line monitoring | |
| CN108226645A (en) | A kind of vacuum circuit breaker divide-shut brake coil direct current resistance m easurem ent device | |
| CN111965498B (en) | Automatic inspection and fault positioning device for insulation state of hydraulic generator screw | |
| CN106597181A (en) | Operation monitoring system and method of high-voltage power transformer | |
| CN111650542A (en) | Detection device and method for preventing slow fusing of generator set terminal voltage transformer fuse | |
| CN203838236U (en) | Device for detecting electric crossing of direct-current system | |
| CN215116734U (en) | Generator transformer trouble record ripples device | |
| CN112977542A (en) | High-voltage equipment on-line monitoring method for high-speed rail train | |
| CN214953952U (en) | Capacitor power-taking switch with fault diagnosis function | |
| CN215894738U (en) | High tension switchgear PT cabinet operation monitoring devices | |
| CN115575778A (en) | Calibration system and calibration method of direct-current insulation monitoring device | |
| CN216926933U (en) | Electrical equipment abnormal signal capture device | |
| CN213986711U (en) | Nuclear power plant enclosed bus transient shell voltage measuring platform | |
| CN214150852U (en) | Transformer voiceprint and voltage acquisition device | |
| CN112946360B (en) | Method for detecting power consumption of power module secondary board card based on curve fitting method | |
| CN114184891A (en) | Direct current power supply fault recording device | |
| CN109164338B (en) | High-power medium-voltage direct-current dry-type load device with online monitoring function | |
| CN114089090A (en) | Power distribution network fault indicator with capacitor voltage division power taking function and control method thereof | |
| CN112986665A (en) | Secondary ground grid voltage monitoring device and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |