CN219552603U - Synchronous wave recording system of gas turbine generator and steam turbine generator - Google Patents
Synchronous wave recording system of gas turbine generator and steam turbine generator Download PDFInfo
- Publication number
- CN219552603U CN219552603U CN202223377240.2U CN202223377240U CN219552603U CN 219552603 U CN219552603 U CN 219552603U CN 202223377240 U CN202223377240 U CN 202223377240U CN 219552603 U CN219552603 U CN 219552603U
- Authority
- CN
- China
- Prior art keywords
- turbine generator
- wave recording
- voltage
- input end
- screen
- 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
Landscapes
- Control Of Eletrric Generators (AREA)
Abstract
The utility model relates to the technical field of synchronous inspection of generators, in particular to a synchronous wave recording system of a gas turbine generator and a steam turbine generator, which comprises a fault wave recording screen; the voltage input end of the fault wave recording screen is connected with the secondary side voltage of the voltage transformers at two sides of the parallel point of the gas turbine generator or the steam turbine generator through cables respectively; and the switching value input end of the fault wave recording screen is connected with a parallel point switch closing signal of the gas turbine generator or the steam turbine generator through a cable to serve as a basis for judging test results, and a closing signal of a synchronous screen closing relay serves as a starting signal. The method solves the problems that the existing synchronous wave recording test before the generator is started needs to be carried out wiring and parameter setting on two sides respectively, if the wiring is wrong, the electrified equipment is mistakenly touched, and when the parameter setting is wrong, the organic unit repeatedly operates, and the grid connection time of the unit is delayed.
Description
Technical Field
The utility model relates to the technical field of synchronous inspection of generators, in particular to a synchronous wave recording system of a gas turbine generator and a steam turbine generator.
Background
The gas generator is a novel and efficient new energy generator which uses combustible gas such as liquefied gas, natural gas and the like as combustion matters to replace gasoline and diesel oil as engine power. The fault recorder is used for the power system, can automatically and accurately record the change conditions of various electric quantities in the processes before and after the fault when the system is in fault, and has important functions of analyzing and processing accidents, judging whether the protection is in correct action and improving the safe running level of the power system through analysis and comparison of the electric quantities.
At present, a movable or portable wave recorder is purchased for carrying out wiring wave recording on equipment at a production site before starting a generator, two parallel points of the generator running along a component axis of the gas turbine are adopted, one is a GCB (i.e. a generator outlet breaker) switch, and the other is a main transformer high-voltage side switch, and the synchronous voltage angles of the two parallel points are different, so that two parameter setting and wire dismounting operations are respectively carried out for each test.
However, in the existing design scheme (as shown in patent number 201910415170.9), wiring and parameter setting are required to be performed on two sides respectively, if wiring is wrong, the problem that electrified equipment is touched by mistake is caused, and when the parameter of the equipment is wrong, the problem that the grid connection time of the machine set is delayed due to repeated operation of the machine set is solved.
Therefore, a synchronous wave recording system of a gas turbine generator and a steam turbine generator is generated.
Disclosure of Invention
The utility model provides a synchronous wave recording system of a gas turbine generator and a steam turbine generator, which mainly solves the problems that the existing synchronous wave recording test of the generator before starting needs to be respectively connected with wires and parameters, if the wires are wrong, the charged equipment is mistakenly touched, and when the parameters of the equipment are wrong, the repeated operation of an organic unit can delay the grid-connected time of the unit.
The utility model provides a synchronous wave recording system of a gas turbine generator, which comprises a fault wave recording screen; the voltage input ends of the fault wave recording screen are respectively connected with the secondary side voltage of the voltage transformers at two sides of the parallel point of the gas turbine generator through cables; the switching value input end of the fault wave recording screen is connected with the parallel point switch closing signal of the gas turbine generator through a cable to serve as a basis for judging test results, and the closing signal of the synchronous screen closing relay serves as a starting signal.
Preferably, the voltage input end of the fault wave recording screen is connected to the outlet of the gas turbine generator and the GCB control cabinet at the low-voltage side of the main transformer of the gas turbine generator respectively.
Preferably, the voltage input end of the fault record screen comprises a first voltage input end and a second voltage input end;
the first voltage input end obtains secondary voltage of the gas turbine generator outlet voltage transformer;
and the second voltage input end acquires the secondary voltage of the voltage transformer in the GCB control cabinet at the low-voltage side of the main transformer of the gas turbine generator.
Preferably, the parallel point switch closing signal and the synchronous screen closing relay closing signal are connected to the switching value end of the fault wave recording screen.
The utility model also provides a synchronous wave recording system of the turbine generator, which comprises a fault wave recording screen; the voltage input end of the fault wave recording screen is connected with the secondary side voltage of the voltage transformers at two sides of the parallel point of the steam turbine generator through cables respectively; the switching value input end of the fault wave recording screen is connected with the parallel point switch closing signal of the turbine generator through a cable to serve as a basis for judging test results, and the closing signal of the synchronous screen closing relay serves as a starting signal.
Preferably, the voltage input end of the fault wave recording screen is connected to the outlet of the turbine generator and the generator set protection screen of the turbine generator respectively.
Preferably, the voltage input end of the fault record screen comprises a first voltage input end and a second voltage input end;
the first voltage input end obtains the secondary voltage of the voltage transformer at the outlet of the steam turbine generator;
and the second voltage input end acquires the voltage after 220kV switching in the generator-transformer group protection screen of the steam turbine generator.
Preferably, the parallel point switch closing signal and the synchronous screen closing relay are connected to the switching value end of the fault wave recording screen.
From the above, the technical scheme provided by the utility model can obtain the following beneficial effects:
firstly, in the technical scheme provided by the utility model, the screen cabinet with the existing design is adopted as a fault wave recording screen, so that the problems of cost surge and high operation risk caused by introducing new equipment are avoided;
secondly, in the technical scheme provided by the utility model, through adding a design loop, the voltages at two sides of the parallel points are connected to the same fault wave recording screen, so that debugging can be realized in the fault wave recording screen, fixed connection is maintained, and repeated disconnection wires are not needed;
thirdly, in the technical scheme provided by the utility model, the fault wave recording screen can calculate the acquired voltage value to obtain the differential pressure between two sides of the parallel points according to an algorithm formula, so that the parameters of the two parallel points are set, the success rate of the test is greatly improved, and further, synchronous wave recording is simply and conveniently realized.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a block diagram of a synchronous recording system according to embodiment 1 of the present utility model;
FIG. 2 is a block diagram of a synchronous recording system according to embodiment 2 of the present utility model;
fig. 3 is a circuit diagram of the synchronous recording system in embodiment 1 and embodiment 2 of the present utility model.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are merely some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without any inventive effort, are intended to be within the scope of the utility model.
The existing synchronous wave recording test before the generator is started needs to be respectively connected with two sides and parameters are set, if the connection is wrong, the problem that electrified equipment is touched by mistake is caused, and when the parameters are wrong, the problem that a machine set is repeatedly operated and the grid connection time is delayed is solved.
It should be emphasized that in this embodiment, a parallel point switch position signal is also introduced, that is, a combination signal or a split signal of a switch in which the generator is integrated into the system to operate, and the state of the parallel point switch can be determined according to the parallel point switch position signal. Correspondingly, whether the synchronous test result is successful or not is judged according to the state of the parallel point switch, and whether the synchronous grid connection requirement of the unit is met or not is judged. In addition, the wiring scheme of embodiment 1 or embodiment 2 may also be selected according to the parallel point switch installation position.
Example 1
As shown in fig. 1 and 3, in order to solve the above-mentioned problems, the present embodiment provides a synchronous wave recording system of a gas turbine generator, which mainly includes a fault wave recording screen 10; the voltage input end of the fault wave recording screen 10 is connected with the secondary side voltage of the voltage transformers at two sides of the parallel point of the gas turbine generator through cables respectively; the switching value input end of the fault wave recording screen 10 is connected into a parallel point switch closing signal of a gas turbine generator through a cable to serve as a basis for judging test results, and a closing relay of the synchronous screen 20 receives a closing signal to serve as a starting signal.
Preferably, the switching relay in this embodiment is connected to the switching value channel of the fault record screen 10. In this embodiment, the switching-on exit signal in this embodiment adopts a standby node of the switching-on relay of the synchronous screen 20 of the gas turbine generator, and the standby node is a passive switching signal and is connected to the switching value channel of the fault wave recording screen 10.
Preferably, in this embodiment, the fault record sampling frequency of the fault record screen 10 is 5kHz, which meets the frequency required by the test.
In this embodiment, the switching signal that incorporates the gas turbine generator into the system operation is taken from the GCB control cabinet; the method comprises the steps of combining a gas turbine generator into a system to operate under the control of GCB, acquiring voltage values at two sides of parallel points when a closing outlet signal is triggered, and calculating the pressure difference according to a preset algorithm and the like. The risk of equipment wiring errors and parameter equipment errors can be effectively reduced, and meanwhile, the labor intensity and the purchasing cost are reduced.
More specifically, the voltage input ends of the fault wave recording screen 10 are respectively connected to the outlet of the gas turbine generator and the GCB control cabinet on the low-voltage side of the main transformer of the gas turbine generator.
Preferably, the voltage input terminal of the fault record screen 10 includes a first voltage input terminal and a second voltage input terminal; the first voltage input end obtains secondary voltage of a voltage transformer at an outlet of the gas turbine generator; and the second voltage input end acquires the secondary voltage of the voltage transformer in the GCB control cabinet at the low-voltage side of the main transformer of the gas turbine generator.
In this embodiment, when the voltage values at two sides of the parallel point, that is, the voltage values at two sides of the switch where the generator is integrated into the system to operate are detected, the differential pressure at two sides of the parallel point can be calculated according to the following formula, for example, taking phase a as an example, and the other two phases are as follows:
"a-phase voltage difference" = "to-be-combined side a-phase voltage" - "system side a-phase voltage";
the "to-be-combined side A-phase voltage" is the A-phase voltage of the generator side of the integrated power grid operation; the "system side phase a voltage" is the phase a voltage of the grid system that needs to be incorporated.
In this embodiment, the fault recording screen 10 can find the corresponding voltage channel and switching value channel according to the original factory drawing, connect with the corresponding point on the gas turbine generator through the cable, modify the data such as the fixed value and the condition of starting recording, and realize the synchronous detection according to the pressure difference between two sides of the parallel point obtained by the calculation.
Example 2
As shown in fig. 2 and 3, in order to solve the foregoing problems, the present embodiment provides an air wave recording system of a turbine generator, which mainly includes a fault wave recording screen 10; the voltage input end of the fault wave recording screen 10 is connected with the secondary side voltage of the voltage transformers at two sides of the parallel point of the steam turbine generator through cables respectively; the fault wave recording screen 10 is connected into a switching value input end of the turbine generator through a cable, is connected into a parallel point switch closing signal of the turbine generator through the cable to serve as a basis for judging test results, and is connected with a closing relay of the synchronous screen 20 to receive a closing signal to serve as a starting signal.
In this embodiment, the connection between the turbine generator and the gas turbine generator in embodiment 1 is consistent, and the synchronous detection is achieved by receiving the pressure difference at the corresponding position, so reference may be made to the corresponding description and operation procedure in embodiment 1.
In this embodiment, the parallel point switching signal is taken from a 220kV GIS cubicle, i.e. an SF6 gas insulated high voltage switchgear.
More specifically, the voltage input end of the fault wave recording screen 10 is connected to the outlet of the turbine generator and the generator set protection screen of the turbine generator respectively.
Preferably, the voltage input terminal of the fault record screen 10 includes a first voltage input terminal and a second voltage input terminal; the first voltage input end obtains the secondary voltage of an outlet voltage transformer of the steam turbine generator; and the second voltage input end acquires the 220kV switched voltage in the generator-transformer group protection screen of the steam turbine generator.
In this embodiment, when the voltages at two sides of the parallel point are detected, that is, the voltage values at two sides of the switch where the generator is integrated into the system to operate, the differential pressure at two sides of the parallel point can be calculated according to the following formula, for example, taking phase a as an example, when the voltage is used for phase B, the voltages of phase a and phase B are calculated, and when the voltage is used for phase C, the voltages of phase B and phase C are calculated:
the "to-be-combined side A-phase voltage" is the A-phase voltage of the generator side of the integrated power grid operation; the system side A phase voltage is the A phase voltage of the power grid system which needs to be integrated; the "system side C-phase voltage" is the C-phase voltage of the grid system that needs to be incorporated.
In this embodiment, the calculation formula of the differential pressure is different from that of embodiment 1, mainly because the voltage at two sides of the parallel point of the turbine generator passes through the corner of the main transformer, so that an algorithm needs to be introduced to eliminate the influence of the corner, so as to obtain an accurate differential pressure value.
In summary, the embodiment provides a synchronous wave recording system of a gas turbine generator and a steam turbine generator, by adding a new design loop, two sides of a parallel point can be directly debugged through the calculation result of a fault wave recording screen, and fixed access is maintained, so that repeated disconnection wires are avoided; meanwhile, two parallel point parameters can be arranged in the wave recording device, so that the success rate of the test is greatly improved.
The above-described embodiments do not limit the scope of the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the above embodiments should be included in the scope of the present utility model.
Claims (8)
1. The synchronous wave recording system of the gas turbine generator is characterized in that: the fault wave recording screen is included; the voltage input ends of the fault wave recording screen are respectively connected with the secondary side voltage of the voltage transformers at two sides of the parallel point of the gas turbine generator through cables; the switching value input end of the fault wave recording screen is connected with the parallel point switch closing signal of the gas turbine generator through a cable to serve as a basis for judging test results, and the closing signal of the synchronous screen closing relay serves as a starting signal.
2. The synchronous wave recording system of a gas turbine generator as set forth in claim 1, wherein: and the voltage input end of the fault wave recording screen is respectively connected with the outlet of the gas turbine generator and the GCB control cabinet at the low-voltage side of the main transformer of the gas turbine generator.
3. The synchronous wave recording system of a gas turbine generator as set forth in claim 2, wherein: the voltage input end of the fault wave recording screen comprises a first voltage input end and a second voltage input end;
the first voltage input end obtains secondary voltage of the gas turbine generator outlet voltage transformer;
and the second voltage input end acquires the secondary voltage of the voltage transformer in the GCB control cabinet at the low-voltage side of the main transformer of the gas turbine generator.
4. The synchronous wave recording system of a gas turbine generator as set forth in claim 1, wherein: and the parallel point switch closing signal and the synchronous screen closing relay closing signal are connected to the switching value end of the fault wave recording screen.
5. The synchronous wave recording system of the turbine generator is characterized in that: the fault wave recording screen is included; the voltage input end of the fault wave recording screen is connected with the secondary side voltage of the voltage transformers at two sides of the parallel point of the steam turbine generator through cables respectively; the switching value input end of the fault wave recording screen is connected with the parallel point switch closing signal of the turbine generator through a cable to serve as a basis for judging test results, and the closing signal of the synchronous screen closing relay serves as a starting signal.
6. The synchronous wave recording system of a turbine generator according to claim 5, wherein: and the voltage input end of the fault wave recording screen is respectively connected with the outlet of the steam turbine generator and the generator-transformer group protection screen of the steam turbine generator.
7. The synchronous wave recording system of a turbine generator as set forth in claim 6, wherein: the voltage input end of the fault wave recording screen comprises a first voltage input end and a second voltage input end;
the first voltage input end obtains the secondary voltage of the voltage transformer at the outlet of the steam turbine generator;
and the second voltage input end acquires the voltage after 220kV switching in the generator-transformer group protection screen of the steam turbine generator.
8. The synchronous wave recording system of a turbine generator according to claim 5, wherein: and the parallel point switch closing signal and the synchronous screen closing relay are connected to the switching value end of the fault wave recording screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223377240.2U CN219552603U (en) | 2022-12-14 | 2022-12-14 | Synchronous wave recording system of gas turbine generator and steam turbine generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223377240.2U CN219552603U (en) | 2022-12-14 | 2022-12-14 | Synchronous wave recording system of gas turbine generator and steam turbine generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219552603U true CN219552603U (en) | 2023-08-18 |
Family
ID=87736025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223377240.2U Active CN219552603U (en) | 2022-12-14 | 2022-12-14 | Synchronous wave recording system of gas turbine generator and steam turbine generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219552603U (en) |
-
2022
- 2022-12-14 CN CN202223377240.2U patent/CN219552603U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107966633B (en) | Method and system for rapidly judging single-phase earth fault line of power distribution network of power supply system | |
| Zhalefar et al. | A high-speed adaptive single-phase reclosing technique based on local voltage phasors | |
| CN104217634B (en) | Distribution true-value simulation test method | |
| CN103280785B (en) | A kind of HVDC (High Voltage Direct Current) transmission line guard method of identifiable design high resistance earthing fault | |
| CN110854924B (en) | One-time voltage-on synchronous phase-checking linkage switching inspection system and inspection method for electrical system | |
| Jianfei et al. | Experimental analysis of EMC immunity for field installed intelligent equipment, of intelligent substation | |
| CN105353283A (en) | AC voltage-withstand test method for 500kV GIL equipment | |
| Andrea et al. | Arcing fault in aircraft distribution network | |
| CN113162040B (en) | System and method for power supply non-voltage nuclear phase for high-voltage plant of power plant | |
| RU2718471C1 (en) | Method of monitoring connections in a device for determining a damaged feeder in networks with neutral, earthed through an arc-suppression coil | |
| Ke et al. | A novel power transformer condition monitoring system based on wide-band measurement of core earth signals and correlation analysis with multi-source data | |
| CN219552603U (en) | Synchronous wave recording system of gas turbine generator and steam turbine generator | |
| CN102565614B (en) | Alternating voltage loop test method | |
| CN116047184A (en) | Nuclear phase method and system for same-frequency same-phase withstand voltage test of three-phase co-tank GIS | |
| Helać et al. | Power Transformer Neutral Point Grounding Methods: Analysis of Fault Characteristics | |
| Li et al. | Research on DC component decay time constant of 1000 kV AC filter circuit breakers in UHV converter station | |
| CN215678700U (en) | High-coupling split reactor type current limiter short-circuit current limiting test loop | |
| Stewart et al. | Conducted immunity requirements for equipment operational during high voltage network switching operations | |
| Kuzmin | Development of the intelligent single phase-to-ground-fault current compensation system for 6–35 kV networks | |
| Cheng et al. | Research on field electromagnetic compatibility test method of system level for electronic transformers | |
| Silva et al. | HVDC Converter Transformers Protection-Part 1: Signal Processing Aspects | |
| Li et al. | The experimental technique and practical scheme of intelligent switch in power distribution IoT | |
| CN116073345B (en) | Intelligent comprehensive grounding management system | |
| CN202872357U (en) | Optimized comprehensive protection device of power grid | |
| JP3197000B2 (en) | Field test method for special high-voltage line using switching surge |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |