CN213125588U - Primary frequency modulation low-frequency oscillation suppressor - Google Patents
Primary frequency modulation low-frequency oscillation suppressor Download PDFInfo
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- CN213125588U CN213125588U CN202021397391.2U CN202021397391U CN213125588U CN 213125588 U CN213125588 U CN 213125588U CN 202021397391 U CN202021397391 U CN 202021397391U CN 213125588 U CN213125588 U CN 213125588U
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- speed regulator
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Abstract
The utility model discloses a primary frequency modulation low frequency oscillation suppressor in power station frequency modulation field, including the speed regulator, the left side electric connection of speed regulator has first wire, and the bottom electric connection of first wire has the second wire, the right-hand member electric connection of second wire has the differentiator, there is the overspeed governor on the right side of differentiator through wire electric connection, the right side electric connection of speed regulator has the third wire, the right side and the third wire electric connection of overspeed governor. The utility model discloses in, through the speed regulator, reach the effect to PID speed regulation, through differentiator and overspeed governor, reach the effect of leading output of incoming signal and stack on PID outputs, through first wire, second wire and third wire, reach the effect of connecting speed regulator, differentiator and overspeed governor, this inhibitor increases the lead through the differentiator and gives PID output, makes the output phase place after the stack advance by a wide margin, and unit power lags behind the reduction.
Description
Technical Field
The utility model relates to a power station frequency modulation field specifically is primary control low frequency oscillation suppressor.
Background
The primary frequency modulation performance of the hydropower station influences the stable operation of a power grid, the effectiveness of primary frequency modulation electric quantity is particularly important, but the primary frequency modulation of the hydroelectric generating set is influenced by PID parameters, a control system, a water hammer effect and the like, the power response of the generating set has certain lag time, and under the condition that a small grid-opening mode is generally adopted in the southwest area at present (the PID parameters are greatly reduced), the adjusting rate of the generating set is greatly reduced, and the power lag time is longer; when the frequency of a power grid fluctuates, the power of a unit with high power grid frequency is reduced, the power of a unit with low power grid frequency is increased, but the influence of lag time is caused, the power of the unit with high power grid frequency is high, and the power of the unit with low power grid frequency is low, so that the power of the unit negatively contributes to the frequency modulation of the power grid, the oscillation of the power grid cannot be fully inhibited, and even worsened.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a primary control low frequency oscillation suppressor to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
the primary frequency modulation low-frequency oscillation suppressor comprises a speed regulator, wherein the left side of the speed regulator is electrically connected with a first lead, the bottom of the first lead is electrically connected with a second lead, the right end of the second lead is electrically connected with a differentiator, the right side of the differentiator is electrically connected with a speed limiter through a lead, the right side of the speed regulator is electrically connected with a third lead, and the right side of the speed limiter is electrically connected with the third lead.
As a further aspect of the present invention: one end of the first lead, which is far away from the speed regulator, is electrically connected with the hydroelectric generating set.
As a further aspect of the present invention: the top of the second wire is fixedly connected with a fourth wire, and the left side of the fourth wire is fixedly connected with the third wire.
As a further aspect of the present invention: the differentiator is electrically connected with the speed limiter through a lead, and the speed limiter is positioned at the rear end of the differentiator.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses in, through the speed regulator, reach the effect to PID speed regulation, through differentiator and overspeed governor, reach the effect of leading output of incoming signal and stack on PID outputs, through first wire, second wire and third wire, reach the effect of connecting speed regulator, differentiator and overspeed governor, this inhibitor increases the lead through the differentiator and gives PID output, makes the output phase place after the stack advance by a wide margin, and unit power lags behind the reduction.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. a speed regulator; 2. a first conductive line; 3. a second conductive line; 4. a differentiator; 5. a speed limiter; 6. a third conductive line; 7. and a fourth conductive line.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, in an embodiment of the present invention, a primary frequency modulation low-frequency oscillation suppressor includes a speed regulator 1, a first conducting wire 2 is electrically connected to a left side of the speed regulator 1, a second conducting wire 3 is electrically connected to a bottom of the first conducting wire 2, a differentiator 4 is electrically connected to a right end of the second conducting wire 3, a speed limiter 5 is electrically connected to a right side of the differentiator 4 through a conducting wire, a third conducting wire 6 is electrically connected to a right side of the speed regulator 1, and the right side of the speed limiter 5 is electrically connected to the third conducting wire 6.
The PID speed regulation effect is achieved through the speed regulator 1, the effect of outputting an input signal in advance and superposing the input signal on the PID output is achieved through the differentiator 4 and the speed limiter 5, the effect of connecting the speed regulator 1, the differentiator 4 and the speed limiter 5 is achieved through the first lead 2, the second lead 3 and the third lead 6, the advance is added to the PID output through the differentiator 4 by the suppressor, the superposed output phase is greatly advanced, and the unit power lag is reduced.
In this embodiment, one end of the first conducting wire 2, which is far away from the speed regulator 1, is electrically connected with the hydroelectric generating set.
In this embodiment, the top of the second conducting wire 3 is fixedly connected with a fourth conducting wire 7, and the left side of the fourth conducting wire 7 is fixedly connected with the third conducting wire 6.
In the present embodiment, differentiator 4 and speed limiter 5 are electrically connected by a wire, and speed limiter 5 is located at the rear end of differentiator 4.
The utility model discloses a theory of operation is: a differentiator 4 and a speed limiter 5 are added outside a speed regulator 1, an input signal is output in advance and is superposed on PID output, the superposed output value is advanced in phase compared with the non-superposed PID output value, the lag time is shorter, the phase difference with the power grid frequency is smaller, the power grid frequency stability is facilitated, the PID speed regulation effect is achieved through the speed regulator 1, the effect of outputting the input signal in advance and superposing the input signal on the PID output is achieved through the differentiator 4 and the speed limiter 5, the effect of connecting the speed regulator 1, the differentiator 4 and the speed limiter 5 is achieved through a first lead 2, a second lead 3 and a third lead 6, the advance is increased through the differentiator 4 to the PID output, the superposed output phase is greatly advanced, and the unit power lag is reduced.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (4)
1. Primary frequency modulation low frequency oscillation suppressor, including speed regulator (1), its characterized in that: the left side electric connection of speed regulator (1) has first wire (2), and the bottom electric connection of first wire (2) has second wire (3), the right-hand member electric connection of second wire (3) has differentiator (4), wire electric connection limited speed ware (5) is passed through on the right side of differentiator (4), the right side electric connection of speed regulator (1) has third wire (6), the right side and the third wire (6) electric connection of overspeed governor (5).
2. A primary frequency modulation low frequency oscillation suppressor according to claim 1 wherein: one end of the first lead (2) far away from the speed regulator (1) is electrically connected with the hydroelectric generating set.
3. A primary frequency modulation low frequency oscillation suppressor according to claim 1 wherein: the top of the second lead (3) is fixedly connected with a fourth lead (7), and the left side of the fourth lead (7) is fixedly connected with the third lead (6).
4. A primary frequency modulation low frequency oscillation suppressor according to claim 1 wherein: the differentiator (4) is electrically connected with the speed limiter (5) through a lead, and the speed limiter (5) is positioned at the rear end of the differentiator (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021397391.2U CN213125588U (en) | 2020-07-15 | 2020-07-15 | Primary frequency modulation low-frequency oscillation suppressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021397391.2U CN213125588U (en) | 2020-07-15 | 2020-07-15 | Primary frequency modulation low-frequency oscillation suppressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213125588U true CN213125588U (en) | 2021-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021397391.2U Active CN213125588U (en) | 2020-07-15 | 2020-07-15 | Primary frequency modulation low-frequency oscillation suppressor |
Country Status (1)
| Country | Link |
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| CN (1) | CN213125588U (en) |
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2020
- 2020-07-15 CN CN202021397391.2U patent/CN213125588U/en active Active
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