CN207301284U - The primary frequency modulation performance detecting system of generating set - Google Patents
The primary frequency modulation performance detecting system of generating set Download PDFInfo
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- CN207301284U CN207301284U CN201721328582.1U CN201721328582U CN207301284U CN 207301284 U CN207301284 U CN 207301284U CN 201721328582 U CN201721328582 U CN 201721328582U CN 207301284 U CN207301284 U CN 207301284U
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Abstract
The primary frequency modulation performance detecting system of the generating set of the utility model, including microprocessor, A/D modular converters, voltage transformer, current transformer, power-factor measurement module and frequency measuring block, voltage transformer and current transformer measure the magnitude of voltage and current value of generator respectively；It is characterized in that：Power-factor measurement module, frequency measuring block measure the power factor of generator and the frequency of generator output alternating current respectively, and microprocessor is connected with the display module of display generator voltage, electric current, power factor and output frequency.The performance detecting system of the utility model can reflect the parameters of generator in real time, solve the problems, such as by testing the Primary frequency control ability of test generator with actual conditions not being inconsistent in the past, substantially increase the time of Resolving probiems, generator is improved in time there are problem, improve Primary frequency control ability, so as to electric power grid frequency stabilization to a certain extent, there is certain novelty.
Description
Technical field
A kind of primary frequency modulation performance detecting system of generating set is the utility model is related to, more specifically, more particularly to
It is a kind of can the voltage of actual response generator, electric current, power factor, frequency, the generating set of the situation of change of tach signal
Primary frequency modulation performance detecting system.
Background technology
With the development of the social economy, human lives are growing day by day to the demand of electric power, the stability of supply of electric power with
And reliability will directly influence the stability of enterprise's shop equipment and the life of the people and property safety, and mains frequency is
Generated output and the foundation of power load balance, reflect the balance between power supply and demand, are one of power quality three norms,
And the important control parameter of Operation of Electric Systems.When generated output and power load are equal in magnitude, mains frequency is stablized.When
When power grid occurrence frequency disturbs, recovering the stabilization of power grids needs by each composition in generating set in power grid and interconnected electric power system
Partial coordination is controlled to complete.Primary frequency modulation, refers to the frequency of power grid when offrating, generator set control in power grid
The increase and decrease of system robot brain active power, limitation mains frequency change, makes mains frequency remain stable and automatically controlled
Journey.The control of one secondary frequencies for serious generating set stop transport or load synthesis after the fast quick-recovery of frequency and stablize play it is non-
Often important effect.The primary frequency modulation performance index of control zone also becomes a big key element of power network safety operation.
The main method of detection primary frequency modulation performance index is exactly to be tested by conventional primary frequency modulation to detect unit at present
Primary frequency modulation performance.Shortcoming is can only be by the change frequency of step（Rotating speed）Difference signal tests the primary frequency modulation energy of unit
Power.But since actual mains frequency is continually changing, original primary frequency modulation, which is tested, particularly under grid fault conditions does
Method cannot detect the primary frequency modulation performance of unit well.
The content of the invention
The shortcomings that the utility model is in order to overcome above-mentioned technical problem, there is provided it is a kind of can actual response generator electricity
Pressure, electric current, power factor, frequency, the situation of change of tach signal generating set primary frequency modulation performance detecting system.
The primary frequency modulation performance detecting system of the generating set of the utility model, including microprocessor, A/D modular converters,
Voltage transformer, current transformer, power-factor measurement module and frequency measuring block, voltage transformer and current transformer point
Magnitude of voltage and current value that Ce Liang be on generator output road；It is characterized in that：Voltage transformer and current transformer it is defeated
Go out after the processing of RMS to DC circuit and input to the input terminal of A/D modular converters, the output of A/D modular converters and microprocessor
The input terminal of device is connected；Power-factor measurement module, frequency measuring block measure power factor and the power generation of generator respectively
Machine exports the input terminal phase exported with microprocessor of the frequency of alternating current, power-factor measurement module and frequency measuring block
Connection；The microprocessor is connected with for voltage, electric current, power factor and output during showing generator primary frequency modulation frequently
The display module of rate.
The primary frequency modulation performance detecting system of the generating set of the utility model, including the rotating speed of generator is measured
Speed probe, the output of speed probe is connected with the input terminal of microprocessor.
The primary frequency modulation performance detecting system of the generating set of the utility model, the A/D modular converters use model
The analog-digital converter of ADS1256, microprocessor use the chip of model MSP430F149.
The beneficial effects of the utility model are：The primary frequency modulation performance detecting system of the generating set of the utility model, leads to
The output terminal crossed in generator sets voltage transformer, current transformer, power-factor measurement module, frequency measuring block and turns
Fast sensor, realizes measurement of the generator in primary frequency modulation process voltage, electric current, power factor, frequency, tach signal, and
Come out by display module real-time display.So that in the case that disturbance or electric network fault occur in actual moving process for power grid,
The performance detecting system of the utility model can reflect the parameters of generator in real time, solve and passed through experiment in the past
Test the problem of Primary frequency control ability and the actual conditions of generator are not inconsistent, can actual response go out grid disturbance or fault condition
Under, generator carries out voltage, electric current, power factor, frequency, the situation of change of tach signal during primary frequency modulation, and then reacts hair
The primary frequency modulation performance of motor, substantially increases the time of Resolving probiems, and generator is improved in time there are problem, improves once
Fm capacity, so that electric power grid frequency stabilization to a certain extent, has certain novelty.
Brief description of the drawings
Fig. 1 is the schematic diagram of the primary frequency modulation performance detecting system of the generating set of the utility model.
In figure：1 generator, 2 voltage transformers, 3 current transformers, 4 power-factor measurement modules, 5 frequency measuring blocks,
6 speed probes, 7 RMS to DC circuits, 8 A/D modular converters, 9 microprocessors, 10 display modules.
Embodiment
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, the schematic diagram of the primary frequency modulation performance detecting system of the generating set of the utility model is given, its
By microprocessor 9, A/D modular converters 8, voltage transformer 2, current transformer 3, power-factor measurement module 4, frequency measurement mould
Block 5, speed probe 6 form, and microprocessor 9 has the function that signal acquisition, data operation and control output.Voltage transformer
2 and current transformer 3 be arranged on the outlet line of generator 1, carried out for the magnitude of voltage and current value that are exported to generator 1
Measurement；The output signal of voltage transformer 2 and current transformer 3 is inputted to A/D and turned after the processing of RMS to DC circuit 7
The input terminal of block 8 is changed the mold, after the voltage and current analog signal of input is converted into digital signal by A/D modular converters 8, then it is defeated
Enter to the input terminal of microprocessor 9.
The output terminal of shown generator 1 is additionally provided with power-factor measurement module 4 and frequency measuring block 5, power factor
Input terminal of the output of measurement module 4 and frequency measuring block 5 with microprocessor 9 is connected.4 He of power-factor measurement module
The power factor to generator 1 and the frequency of the output AC energy of generator 1 measure frequency measuring block 5 respectively, and will
Measurement power factor and frequency signal are inputted into microprocessor 9.
Be provided with the speed probe 6 measured to its rotating speed on shown generator 1, the output of speed probe 6 with
Microprocessor 9 is connected, to send the tach signal of detection into microprocessor 9.Shown microprocessor 9 is connected with aobvious
Show module 10, voltage, electric current, power factor, frequency and the tach signal that display module 10 is used to gather microprocessor 9 are shown
Out.
Shown A/D modular converters 8 can use the analog-digital converter of model ADS1256, and ADS1256 is micro energy lose, height
Precision, 8 passages, the high-performance analog-digital converter of 24（ADC）, include programmable gain amplifier（PGA）, can during PGA=1
The effective resolution of up to 25.3 is provided；During PGA=64, it is possible to provide the effective resolution of up to 22.5.Microprocessor 9 can
Using the chip of model MSP430F149,
The performance detecting system of the utility model can reflect the parameters of generator in real time, solve in the past
The problem of Primary frequency control ability and actual conditions by testing test generator are not inconsistent, can actual response go out grid disturbance or therefore
In the case of barrier, generator carries out voltage, electric current, power factor, frequency, the situation of change of tach signal during primary frequency modulation, and then
The primary frequency modulation performance of generator is reacted, the time of Resolving probiems is substantially increased, generator is improved in time there are problem, it is complete
Kind Primary frequency control ability, so that electric power grid frequency stabilization to a certain extent, has certain novelty.
Claims (3)
1. a kind of primary frequency modulation performance detecting system of generating set, including microprocessor（9）, A/D modular converters（8）, voltage
Mutual inductor（2）, current transformer（3）, power-factor measurement module（4）And frequency measuring block（5）, voltage transformer and electric current
Mutual inductor measures magnitude of voltage and current value on generator output road respectively；It is characterized in that：Voltage transformer and electric current are mutual
The output of sensor is through RMS to DC circuit（7）Processing after input to A/D modular converters（8）Input terminal, A/D modular converters
Output be connected with the input terminal of microprocessor；Power-factor measurement module, frequency measuring block measure generator respectively
The frequency of power factor and generator output alternating current, the output of power-factor measurement module and frequency measuring block with micro- place
The input terminal of reason device is connected；The microprocessor is connected with for showing voltage, electric current, work(during generator primary frequency modulation
The display module of rate factor and output frequency（10）.
2. the primary frequency modulation performance detecting system of generating set according to claim 1, it is characterised in that：Including to power generation
Machine（1）The speed probe that measures of rotating speed（6）, the output of speed probe and microprocessor（9）Input terminal be connected
Connect.
3. the primary frequency modulation performance detecting system of generating set according to claim 1 or 2, it is characterised in that：The A/D
Modular converter（8）Using the analog-digital converter of model ADS1256, microprocessor（9）Using the core of model MSP430F149
Piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721328582.1U CN207301284U (en) | 2017-10-17 | 2017-10-17 | The primary frequency modulation performance detecting system of generating set |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721328582.1U CN207301284U (en) | 2017-10-17 | 2017-10-17 | The primary frequency modulation performance detecting system of generating set |
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| Publication Number | Publication Date |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111896805A (en) * | 2020-08-05 | 2020-11-06 | 贵州电网有限责任公司 | Frequency response test signal output device and method for continuous signal output |
| CN111896833A (en) * | 2020-08-05 | 2020-11-06 | 贵州电网有限责任公司 | Offline real-time dynamic frequency response test method |
| CN111896806A (en) * | 2020-08-05 | 2020-11-06 | 贵州电网有限责任公司 | Frequency response test system and test method |
-
2017
- 2017-10-17 CN CN201721328582.1U patent/CN207301284U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111896805A (en) * | 2020-08-05 | 2020-11-06 | 贵州电网有限责任公司 | Frequency response test signal output device and method for continuous signal output |
| CN111896833A (en) * | 2020-08-05 | 2020-11-06 | 贵州电网有限责任公司 | Offline real-time dynamic frequency response test method |
| CN111896806A (en) * | 2020-08-05 | 2020-11-06 | 贵州电网有限责任公司 | Frequency response test system and test method |
| CN111896805B (en) * | 2020-08-05 | 2023-10-27 | 贵州电网有限责任公司 | Frequency response test signal output device and method for continuous signal output |
| CN111896806B (en) * | 2020-08-05 | 2023-10-27 | 贵州电网有限责任公司 | Frequency response test system and test method |
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