CN113153616A - Hydroelectric generating set power adjusting method and control system based on S-curve algorithm and hydroelectric generating set - Google Patents

Hydroelectric generating set power adjusting method and control system based on S-curve algorithm and hydroelectric generating set Download PDF

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CN113153616A
CN113153616A CN202110306734.2A CN202110306734A CN113153616A CN 113153616 A CN113153616 A CN 113153616A CN 202110306734 A CN202110306734 A CN 202110306734A CN 113153616 A CN113153616 A CN 113153616A
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speed
power
guide vane
hydroelectric generating
generating set
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Inventor
王聪
张建明
张治宇
刘同安
李娜
于尚北
李佶
逯鹏程
郑楚艾
庞鹏飞
田追欣
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BEIJING IWHR TECHNOLOGY CO LTD
China Institute of Water Resources and Hydropower Research
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BEIJING IWHR TECHNOLOGY CO LTD
China Institute of Water Resources and Hydropower Research
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Priority to CN202110306734.2A priority Critical patent/CN113153616A/en
Publication of CN113153616A publication Critical patent/CN113153616A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B15/00—Controlling
    • F03B15/02—Controlling by varying liquid flow
    • F03B15/04—Controlling by varying liquid flow of turbines
    • F03B15/06—Regulating, i.e. acting automatically
    • F03B15/16—Regulating, i.e. acting automatically by power output
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Water Turbines (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

The invention provides a hydroelectric generating set power adjusting method based on an S-curve algorithm, a control system and a hydroelectric generating set, relates to the technical field of hydroelectric generating sets, and solves the technical problems that the hydroelectric generating set has relatively large power oscillation and relatively unstable power when a traditional linear control algorithm is adopted to adjust the opening of a guide vane in the prior art. The method comprises the steps of adjusting the opening degree of the guide vane to adjust the power of the hydroelectric generating set, and controlling the change of the moving speed of the guide vane by an S-shaped acceleration and deceleration speed curve analysis algorithm to improve the power oscillation condition of the hydroelectric generating set. When the opening degree of the guide vane is controlled to adjust the power of the hydroelectric generating set, the speed change process of the guide vane comprises three stages which are a slow speed increasing section, a speed stabilizing section and a slow speed reducing section in sequence. The invention is used for realizing small power fluctuation and good stability when the opening degree of the guide vane is adjusted, and can better inhibit the action of power back adjustment.

Description

Hydroelectric generating set power adjusting method and control system based on S-curve algorithm and hydroelectric generating set
Technical Field
The invention relates to the technical field of hydroelectric generating sets, in particular to a hydroelectric generating set power adjusting method based on an S-curve algorithm, a control system and a hydroelectric generating set.
Background
The speed regulator of the hydroelectric generating set is used as a core device for controlling the frequency and the power of the hydroelectric generating set, and the load adjustment mainly comprises two adjusting modes, namely an opening adjusting mode and a power adjusting mode, under the grid-connected state, and the principle of the speed regulator is shown in figure 1. The speed regulator is in an opening degree regulation mode, and the closed-loop regulation of the active power of the unit is mainly realized by a monitoring system; the speed regulator receives an increase and decrease pulse signal from an LCU (lower computer of a monitoring system) and then performs guide vane switching action, so that the active power of the unit is adjusted. The speed regulator is in a power regulation mode, the LCU directly issues an active power regulation target value to the speed regulator through communication or analog quantity signals, and the speed regulator performs power closed-loop regulation in a PI regulation mode according to a power deviation value.
In the process of increasing and decreasing the power of the hydroelectric generating set in a grid-connected operation state, power oscillation, power fluctuation and power back regulation are easily caused due to the influence of nonlinear factors such as water flow inertia time constant and guide vane closing time and human factors such as unreasonable setting of regulating parameters of a monitoring system and a speed regulator. As shown in fig. 2 (in fig. 2, the curve located above is the power line), the power of the unit exhibits severe oscillation and fluctuation in the process of reducing to the target power. As shown in fig. 3 and 4 (in fig. 3, the curve located on the lower side in the abscissa 0-4s is the power line, and in fig. 4, the curve located on the upper side in the abscissa 2-14s is the power line), during the power increase and decrease of the unit, the power of the unit changes in the opposite direction due to the "water hammer" caused by the guide vane at the moment of action, i.e. the power is reversely adjusted. The problems of power oscillation, power fluctuation, counter regulation and the like of the unit in the power regulation process are widely existed in the unit operation process, and the safe and stable operation of a power plant and a power system is seriously influenced.
Disclosure of Invention
The invention aims to provide a hydroelectric generating set power adjusting method, a control system and a hydroelectric generating set based on an S-curve algorithm, and solves the technical problems that the hydroelectric generating set has relatively large power oscillation and relatively unstable power when the traditional linear control algorithm is adopted to adjust the opening degree of a guide vane in the prior art. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a hydroelectric generating set power adjusting method based on an S-curve algorithm, which comprises the following steps: the opening degree of the guide vane is adjusted to adjust the power of the hydroelectric generating set, and the power oscillation condition of the hydroelectric generating set is improved by controlling the movement speed change of the guide vane based on an S-shaped acceleration and deceleration speed curve analysis algorithm.
Further, when the opening degree of the guide vane is adjusted to adjust the power of the hydroelectric generating set, the speed change process of the guide vane comprises three stages which are a slow speed increasing stage, a speed stabilizing stage and a slow speed reducing stage in sequence; in the slow speed increasing section, the speed of the guide vane is gradually increased from the initial speed; in the slow deceleration section, the speed of the guide vane gradually decreases until the speed is the initial speed.
Further, setting the duration of the slow speed increasing section to be time T1, setting the duration of the speed stabilizing section to be time T2, and setting the duration of the slow speed decreasing section to be time T3, wherein the time T1 is the same as or different from the time T3; the time T3 is greater than the time T1 and the time T2.
Further, the ratio range of the time T1 is 15-30%; the proportion range of the time T2 is 50% -70%; the proportion range of the time T3 is 15-30%.
Further, in the speed stabilizing section, the speed of the guide vane is a certain value or the speed of the guide vane fluctuates within a certain range.
Further, the speed curve of the slow speed increasing section is S-shaped, and the acceleration in the slow speed increasing section is increased firstly and then reduced.
Further, the speed curve of the slow speed reduction section is in an S shape, and the acceleration in the slow speed increasing section is increased firstly and then reduced.
The control system comprises a control device and a driving structure, wherein the control device is connected with the driving structure, the driving structure is connected with the guide vane and drives the guide vane to act, and the control device can realize the control of speed change when the guide vane is opened and the control of speed change when the guide vane is closed based on an S-shaped acceleration and deceleration curve analysis algorithm.
Further, the control system further comprises a feedback signal structure, the feedback signal structure is connected with the control device, and the feedback signal structure is used for detecting the speed of the guide vane and feeding back a speed signal to the control device.
A hydroelectric generating set comprises the control system.
The invention provides a hydroelectric generating set power adjusting method based on an S-curve algorithm, which comprises the following steps: the opening degree of the guide vane is adjusted to adjust the power of the hydroelectric generating set, the water flow can be adjusted by adjusting the opening degree of the guide vane, and the condition of power oscillation of the hydroelectric generating set is improved by controlling the moving speed of the guide vane based on an S-shaped acceleration and deceleration speed curve analysis algorithm. When the opening of the guide vane is adjusted to adjust the power of the hydroelectric generating set, the speed change process of the guide vane comprises three stages which are a slow speed increasing section, a speed stabilizing section and a slow speed reducing section in sequence; in the slow speed increasing section, the speed of the guide vane is gradually increased from the initial speed; in the slow deceleration section, the speed of the guide vane is gradually reduced until the guide vane is the initial speed, and water hammer generated in the moment of action of the guide vane is effectively relieved due to the adoption of the control of buffering acceleration and deceleration, so that the power oscillation, fluctuation and counter regulation of the unit are effectively inhibited.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of an opening degree adjustment mode and a power adjustment mode of a hydroelectric generating set in the prior art during load adjustment in a grid-connected state;
FIG. 2 illustrates a graph of power oscillations and fluctuations of a vane in accordance with a conventional control algorithm;
FIG. 3 illustrates a graph of reverse power regulation of a vane according to a conventional control algorithm;
FIG. 4 illustrates a graph of reverse power regulation of a vane according to a conventional control algorithm;
FIG. 5 is a graph of speed versus time for an adjusting guide vane based on an S-curve acceleration and deceleration algorithm provided by the present invention;
FIG. 6 is a graph of displacement versus time for an adjusting guide vane based on an S-curve acceleration and deceleration algorithm provided by the present invention;
FIG. 7 is a graph of parameter values and time obtained by adjusting guide vanes based on an S-curve acceleration and deceleration algorithm (5% power change adjustment test);
FIG. 8 is a graph of various parameter values versus time (5% power change adjustment test) obtained by adjusting guide vanes based on a conventional control algorithm provided by the present invention;
FIG. 9 is a graph of parameter values and time obtained by adjusting guide vanes based on an S-curve acceleration and deceleration algorithm (10% power change adjustment test);
FIG. 10 is a graph of various parameter values versus time (10% power change adjustment test) obtained by adjusting guide vanes based on a conventional control algorithm provided by the present invention;
FIG. 11 is a graph of parameter values and time (20% power change adjustment test) obtained by adjusting guide vanes based on an S-curve acceleration and deceleration algorithm provided by the present invention;
FIG. 12 is a graph of various parameter values versus time (20% power change adjustment test) derived from adjusting the vanes based on a conventional control algorithm as provided by the present invention;
FIG. 13 is a graph of parameter values and time (40% power change adjustment test) obtained by adjusting guide vanes based on an S-curve acceleration and deceleration algorithm provided by the present invention;
FIG. 14 is a graph of parameter values and time (40% power change adjustment test) obtained by adjusting guide vanes based on an S-curve acceleration and deceleration algorithm provided by the present invention;
FIG. 15 is a graph of various parameter values versus time (40% power change adjustment test) obtained by adjusting guide vanes based on a conventional control algorithm provided by the present invention;
FIG. 16 is a graph of various parameter values versus time (40% power change adjustment test) obtained by adjusting guide vanes based on a conventional control algorithm provided by the present invention;
FIG. 17 is a table of values of parameters of the hydroelectric generating set during the test;
FIG. 18 is a graph of power stability index;
FIG. 19 is a graph of power regulation dynamic response.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The invention provides a hydroelectric generating set power adjusting method based on an S-curve algorithm, which comprises the following steps: the opening degree of the guide vane is adjusted to adjust the power of the hydroelectric generating set, the water flow can be adjusted by adjusting the opening degree of the guide vane, and the condition of power oscillation of the hydroelectric generating set is improved by controlling the moving speed of the guide vane based on an S-shaped acceleration and deceleration speed curve analysis algorithm. Specifically, when the opening of the guide vane is adjusted to adjust the power of the hydroelectric generating set, the speed change process of the guide vane comprises three stages which are a slow speed increasing stage, a speed stabilizing stage and a slow speed reducing stage in sequence; in the slow speed increasing section, the speed of the guide vane is gradually increased from the initial speed (the initial speed is usually zero); in the slow deceleration section, the speed of the guide vanes gradually decreases until it is the initial speed (the initial speed is typically zero). Due to the adoption of the control of buffering acceleration and deceleration, the water hammer generated in the moment of the action of the guide vane is effectively relieved, so that the power oscillation, fluctuation and counter regulation of the unit are effectively inhibited.
In the speed stabilizing section, the speed of the guide vane is a certain value or fluctuates within a certain range; the speed curve of the slow speed increasing section is in an S shape, and the acceleration in the slow speed increasing section is increased firstly and then reduced; the speed curve of the slow deceleration section is in an S shape, and the acceleration in the slow deceleration section is increased firstly and then reduced. When the opening of the guide vane is adjusted to adjust the power of the hydroelectric generating set, referring to fig. 5, a speed change curve of the guide vane based on an S-curve acceleration and deceleration algorithm is schematically shown, where AC is a slow acceleration section, CD is a speed stabilization section, and DB is a slow deceleration section. Referring to fig. 6, fig. 6 is a corresponding time-displacement diagram, in fig. 6, AC corresponds to the displacement of the slow speed increasing stage, CD corresponds to the displacement of the speed stabilizing stage, and DB corresponds to the displacement of the slow speed decreasing stage. ACDB may represent a gradual increase in the opening of the guide vanes, and EHIF may represent a gradual decrease in the opening of the guide vanes. For using a conventional linear control algorithm, see FIG. 6, governor controlThe guide vane moves at a constant speed (under the traditional control algorithm) according to the current position yAActing to a target position yBThe guide vane can generate larger impact at the moment of switching action to generate water hammer, thereby influencing the stability of the dynamic response of the unit power. Note that, in fig. 6, a line marked with ACDB and located relatively below is a displacement line of the guide vane based on the S-type acceleration/deceleration curve analysis algorithm, a line marked with EHIF and located relatively above is a displacement line of the guide vane based on the S-type acceleration/deceleration curve analysis algorithm, and in fig. 6, the other curve is a displacement line of the guide vane based on the conventional control algorithm.
Setting the time length occupied by the slow speed increasing section as time T1, setting the time length occupied by the speed stabilizing section as time T2, and setting the time length occupied by the slow speed reducing section as time T3, wherein the time T1 is the same as or different from the time T3; time T3 is greater than times T1 and T2. Preferably, the time T1 is in the range of 15% -30%; the proportion range of the time T2 is 50-70%; the proportion range of the time T3 is 15-30%. Referring to fig. 5, the AC block time ratio T1 may be set to about 20%, the CD block time ratio T2 may be set to about 60%, and the DB block time ratio T3 may be set to about 20%. Of course, the time ratio of the slow speed increasing stage, the speed stabilizing stage, and the slow speed decreasing stage is not limited to the above-described one, and the ratio can be set appropriately according to the actual situation.
A control system for realizing a hydroelectric generating set power regulation method based on an S-curve algorithm comprises a control device and a driving structure, wherein the control device is connected with the driving structure, the driving structure is connected with a guide vane and drives the guide vane to act, and the control device can realize control over the moving speed of the guide vane based on an S-shaped acceleration and deceleration speed curve analysis algorithm. Due to the adoption of the control of buffering acceleration and deceleration, the water hammer generated in the moment of the action of the guide vane is effectively relieved, so that the power oscillation, fluctuation and counter regulation of the unit are effectively inhibited. Preferably, the control system further comprises a feedback signal structure, the feedback signal structure is connected with the control device, and the feedback signal structure is used for detecting the speed of the guide vane and feeding the speed signal back to the control device.
The invention provides a hydroelectric generating set which comprises a control system provided by the invention. When the opening of the guide vane is adjusted to adjust the power of the hydropower, the water hammer generated in the moment of the action of the guide vane can be effectively relieved, so that the power oscillation, fluctuation and reverse adjustment of the unit are effectively inhibited.
Example (b):
the field test is carried out on one unit of the hydropower station, and the main parameters of the test unit are shown in figure 17. The test data is obtained from a data acquisition system of the unit speed regulator, and the data acquired in real time mainly comprises unit frequency, unit power, a set power given value and guide vane opening. On the basis of 50% of rated power of the unit, amplitude variation adjustment tests of 5%, 10%, 20% and 40% of power are carried out. The dynamic response process of power regulation based on the S-curve algorithm control strategy and the traditional linear control strategy is compared through the test.
The small-amplitude power adjustment test is carried out on the basis of 50% of rated power, and a 5% power change adjustment test is carried out. Under the condition of stable power regulation, the monitoring system directly issues a power regulation target value of 55% to the speed regulator to respectively carry out 50% -55% -50% power regulation tests, and the field test curves are shown in figures 7-8; FIG. 7 is a power regulation test curve under an S-curve control strategy; fig. 8 is a power regulation test curve under a linear control strategy. In fig. 7, when the time t is 14s, the ordinate corresponding to each curve from bottom to top is the frequency value, the power value, the set power value, and the guide vane opening in sequence; in fig. 8, when the time t is 12s, the ordinate corresponding to each curve from bottom to top is the frequency value, the power value, the set power value, and the guide vane opening degree in this order.
The small-amplitude power adjustment test is carried out on the basis of 50% of rated power, and a 10% power change adjustment test is carried out. Under the condition of stable power regulation, the monitoring system directly issues a power regulation target value of 60% to the speed regulator to respectively carry out 50% -60% -50% power regulation tests, and the field test curves are shown in figures 9-10; FIG. 9 is a power regulation test curve under the S-curve control strategy; fig. 10 is a power regulation test curve under a linear control strategy. In fig. 9, when the time t is 22s, the ordinate corresponding to each curve from bottom to top is the frequency value, the power value, the guide vane opening, and the set power value in turn; in fig. 10, when the time t is 20s, the ordinate corresponding to each curve from bottom to top is the frequency value, the power value, the guide vane opening, and the set power value in this order.
The small-amplitude power adjustment test is carried out on the basis of 50% of rated power, and a 20% power change adjustment test is carried out. Under the condition of stable power regulation, the monitoring system directly issues a power regulation target value of 70% to the speed regulator to respectively carry out 50% -70% -50% power regulation tests, and the field test curves are shown in figures 11-12; FIG. 11 is a power regulation test curve under the S-curve control strategy; fig. 12 is a power regulation test curve under a linear control strategy. In fig. 11, when the time t is 20s, the ordinate corresponding to each curve from bottom to top is the frequency value, the power value, the guide vane opening, and the set power value in turn; in fig. 12, when the time t is 20s, the ordinate corresponding to each curve from bottom to top is the frequency value, the power value, the guide vane opening, and the set power value in this order.
The small-amplitude power adjustment test is carried out on the basis of 50% of rated power, and a 40% power change adjustment test is carried out. Under the condition of stable power regulation, the monitoring system directly issues a power regulation target value of 90% to the speed regulator to respectively carry out 50% -90% -50% power regulation tests, and the field test curves are shown in figures 13-14; FIGS. 13 and 14 are power regulation test curves under the S-curve control strategy; fig. 14 and 15 are power regulation test curves under a linear control strategy. In fig. 13, when the time t is 70s, the ordinate corresponding to each curve from bottom to top is the frequency value, the power value, the guide vane opening, and the set power value in turn; in fig. 14, when the time t is 40s, the ordinate corresponding to each curve from bottom to top is the frequency value, the set power value, the power value, and the guide vane opening degree in this order. In fig. 15, when the time t is 34s, the ordinate corresponding to each curve from bottom to top is the frequency value, the power value, the guide vane opening, and the set power value in turn; in fig. 16, when the time t is 72s, the ordinate corresponding to each curve from bottom to top is the frequency value, the set power value, the guide vane opening, and the power value in this order.
At the power of 5%In the 10% small-amplitude change adjustment test, the power adjustment can finally reach a stable state under two different control strategies, and the S curve control strategy is compared with the power delta of the linear control strategyp、△PmaxSmaller, which indicates better stability; p of power under S curve control strategyfp、tfpVery small, it shows that it suppresses power back regulation better; t is tsThe dynamic response adjustment time is reflected, and the S curve control strategy also has good performance. And the comprehensive test condition shows that the adjusting quality of the S curve control strategy in the small-power adjusting process is excellent.
Power stability index deltapThe method is characterized in that the ratio of the peak-peak value of continuous fluctuation of the output power of a unit to the rated power Pr of the unit, namely the actual output power of the unit to a given value (target value) P, is realized when the unit is in a grid-connected running state and a hydro-power unit speed regulator is in a power control modesetThe maximum interval of the deviation relative values and the unit power fluctuation curve are shown in figure 18. The calculation formula is as follows, deltapIs a power stability index; delta PmaxThe maximum wave peak value of the output power of the unit in the continuous fluctuation period is MW; delta PminThe minimum trough value of the output power of the unit in the continuous fluctuation period is MW; pr is the rated power of the unit, and the unit is MW.
Figure BDA0002988005690000081
FIG. 19 is a power regulation dynamic response curve, p0The current value of the unit power is obtained; p is a radical of1The target value of the unit power is obtained; pr is the rated power of the unit; p is a radical offpThe reverse peak power of the unit; delta PmaxOvershoot for power regulation; ts is the adjustment time; t is tMTime to peak; t is t0.9Is the rise time; t is thxIs the lag time; t is tfpTo the time of reaching the inverted peak.
Overshoot Δ P of linear control strategy during 20% power regulationmax、pfpThe peak values of the inverse regulation are larger, which shows that the S curve control strategy can effectively restrain the power regulationThe power overshoot and the back regulation peak of the dynamic response process are regulated.
Fig. 13-16 are dynamic response curves of 40% power variation amplitude, and the stability and the regulation quality are better represented by the S-curve control strategy. But when care is needed, for the adjustment time tsThe linear control strategy is smaller, which shows that in order to achieve a better control effect, the linear control strategy adopts a faster guide vane action mode under a high-power change amplitude to achieve rapid power adjustment, however, the instability of the power in the adjustment process is increased by the mode.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (10)

1. A hydroelectric generating set power adjusting method based on an S-curve algorithm is characterized by comprising the following steps:
the opening degree of the guide vane is adjusted to adjust the power of the hydroelectric generating set, and the moving speed of the guide vane is controlled to improve the power oscillation condition of the hydroelectric generating set based on an S-shaped acceleration and deceleration speed curve analysis algorithm.
2. The hydroelectric generating set power adjusting method based on the S-curve algorithm of claim 1, wherein when the opening degree of the guide vane is adjusted to adjust the power of the hydroelectric generating set, the speed change process of the guide vane comprises three stages which are a slow speed increasing stage, a speed stabilizing stage and a slow speed decreasing stage in sequence;
in the slow speed increasing section, the speed of the guide vane is gradually increased from the initial speed;
in the slow deceleration section, the speed of the guide vane gradually decreases until the speed is the initial speed.
3. The hydroelectric generating set power adjusting method based on the S-curve algorithm of claim 2, wherein the time length occupied by the slow speed increasing section is set as time T1, the time length occupied by the speed stabilizing section is set as time T2, the time length occupied by the slow speed reducing section is set as time T3,
the time T1 is the same as or different from the time T3;
the time T3 is greater than the time T1 and the time T2.
4. The hydroelectric generating set power adjusting method based on the S-curve algorithm of claim 3, wherein the time T1 is 15-30% by weight;
the proportion range of the time T2 is 50% -70%;
the proportion range of the time T3 is 15-30%.
5. The hydroelectric generating set power adjusting method based on the S-curve algorithm of claim 1, wherein in the speed stabilizing section, the speed of the guide vane is a certain value or fluctuates within a certain range.
6. The hydroelectric generating set power adjusting method based on the S-curve algorithm of claim 1, wherein the speed curve of the slow speed increasing section is S-shaped, and the acceleration in the slow speed increasing section is increased firstly and then decreased.
7. The hydroelectric generating set power adjusting method based on the S-curve algorithm of claim 1, wherein the speed curve of the slow deceleration section is S-shaped, and the acceleration in the slow acceleration section is increased and then decreased.
8. A control system for implementing the hydroelectric generating set power regulation method based on the S-curve algorithm according to any one of claims 1 to 7, comprising a control device and a drive structure, wherein,
the control device is connected with the driving structure, the driving structure is connected with the guide vane and drives the guide vane to act, and the control device can realize control of the moving speed of the guide vane based on an S-shaped acceleration and deceleration speed curve analysis algorithm.
9. The control system of claim 8, further comprising a feedback signal structure coupled to the control device, the feedback signal structure configured to detect a speed of the guide vane and to feed a speed signal back to the control device.
10. A hydroelectric generating assembly comprising a control system as claimed in claim 8.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114396353A (en) * 2021-12-18 2022-04-26 华能澜沧江水电股份有限公司 Method and system for judging power oscillation of speed regulator of water turbine

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003324993A (en) * 2002-05-07 2003-11-14 Toshiba Corp Speed regulation controller of hydroelectric power station
CN104500326A (en) * 2014-12-09 2015-04-08 华能澜沧江水电有限公司 Starting-up method for hydraulic turbine set of power station
US20170268477A1 (en) * 2014-07-29 2017-09-21 Alstom Renewable Technologies Method for stabilizing the rotation speed of a hydraulic machine with s-characteristics and installation for converting hydraulic energy into electrical energy
CN107834610A (en) * 2017-11-29 2018-03-23 西南交通大学 A kind of mains frequency dynamic analysing method for considering hydraulic turbine water hammer effect
CN108131238A (en) * 2017-12-21 2018-06-08 国网福建省电力有限公司 A kind of New PID Control method for inhibiting water hammer pressure fluctuation
CN108304615A (en) * 2017-12-28 2018-07-20 华中科技大学 A kind of the Bi-objective preferred method and system of pump-storage generator Running test
CN108443057A (en) * 2018-05-25 2018-08-24 云南电网有限责任公司电力科学研究院 A kind of control method and control device of guide vanes of water turbine aperture
CN110412864A (en) * 2019-08-07 2019-11-05 国网重庆市电力公司电力科学研究院 Turbine Governor System Shift speed segmentally rate test method and readable storage medium storing program for executing
CN111987736A (en) * 2020-09-01 2020-11-24 国网四川省电力公司电力科学研究院 Control method of direct current frequency limit controller for compensating water hammer effect of water turbine

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003324993A (en) * 2002-05-07 2003-11-14 Toshiba Corp Speed regulation controller of hydroelectric power station
US20170268477A1 (en) * 2014-07-29 2017-09-21 Alstom Renewable Technologies Method for stabilizing the rotation speed of a hydraulic machine with s-characteristics and installation for converting hydraulic energy into electrical energy
CN104500326A (en) * 2014-12-09 2015-04-08 华能澜沧江水电有限公司 Starting-up method for hydraulic turbine set of power station
CN107834610A (en) * 2017-11-29 2018-03-23 西南交通大学 A kind of mains frequency dynamic analysing method for considering hydraulic turbine water hammer effect
CN108131238A (en) * 2017-12-21 2018-06-08 国网福建省电力有限公司 A kind of New PID Control method for inhibiting water hammer pressure fluctuation
CN108304615A (en) * 2017-12-28 2018-07-20 华中科技大学 A kind of the Bi-objective preferred method and system of pump-storage generator Running test
CN108443057A (en) * 2018-05-25 2018-08-24 云南电网有限责任公司电力科学研究院 A kind of control method and control device of guide vanes of water turbine aperture
CN110412864A (en) * 2019-08-07 2019-11-05 国网重庆市电力公司电力科学研究院 Turbine Governor System Shift speed segmentally rate test method and readable storage medium storing program for executing
CN111987736A (en) * 2020-09-01 2020-11-24 国网四川省电力公司电力科学研究院 Control method of direct current frequency limit controller for compensating water hammer effect of water turbine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
蔡卫江，靳光永，施海东，荣红: "水电高占比电力系统水轮机调速器控制策略研究", 《水电厂自动化》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114396353A (en) * 2021-12-18 2022-04-26 华能澜沧江水电股份有限公司 Method and system for judging power oscillation of speed regulator of water turbine
CN114396353B (en) * 2021-12-18 2023-11-10 华能澜沧江水电股份有限公司 Water turbine speed regulator power oscillation judging method and system

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