CN114483432A - Electric open-limit control method for speed regulator of high-head and large-amplitude hydropower station unit - Google Patents

Electric open-limit control method for speed regulator of high-head and large-amplitude hydropower station unit Download PDF

Info

Publication number
CN114483432A
CN114483432A CN202111547428.4A CN202111547428A CN114483432A CN 114483432 A CN114483432 A CN 114483432A CN 202111547428 A CN202111547428 A CN 202111547428A CN 114483432 A CN114483432 A CN 114483432A
Authority
CN
China
Prior art keywords
guide vane
unit
opening
load
limit
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.)
Pending
Application number
CN202111547428.4A
Other languages
Chinese (zh)
Inventor
钟智
刘建维
逄晓东
张晓东
贺臻
刘靖明
梅晓敏
马春立
田尔旋
贺家维
王新永
李旭红
王远洪
李锐奎
龚登位
陈映喜
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huaneng Lancang River Hydropower Co Ltd
Original Assignee
Huaneng Lancang River Hydropower Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Huaneng Lancang River Hydropower Co Ltd filed Critical Huaneng Lancang River Hydropower Co Ltd
Priority to CN202111547428.4A priority Critical patent/CN114483432A/en
Publication of CN114483432A publication Critical patent/CN114483432A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
    • 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
    • F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
    • F03B11/008—Measuring or testing arrangements
    • 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
    • F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
    • 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
    • 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
    • F03B15/14—Regulating, i.e. acting automatically by or of water level
    • 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

Landscapes

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

Abstract

The invention discloses an electrical open-limit control method for a speed regulator of a high-waterhead and large-amplitude hydropower station unit, which is characterized in that the electrical open-limit of a guide vane is set in a correlation manner by a method for classifying and controlling different running states of the unit and by utilizing the reverse close characteristic of the running waterhead of the unit and the electrical open-limit of the guide vane and depending on the self-adaptive function of the waterhead of the existing speed regulator, namely the function of automatically identifying the actual running waterhead of the unit by the speed regulator, so that the accurate control of the electrical open-limit of the guide vane in the no-load state, the power generation state and the starting process of the speed regulator is realized. The electric limit opening and closing accurate control of the guide vanes under different unit operation states is realized, the problem that manual setting of electric limit opening is inaccurate and untimely is solved, the operation risk of unit startup failure or overspeed is reduced, the risk that the electric limit opening and closing is improper when the unit output is limited or operates in overload is avoided, and the stable operation of the unit is effectively guaranteed.

Description

Electric open-limit control method for speed regulator of high-head and large-amplitude hydropower station unit
Technical Field
The invention relates to an electrical open-limit control method for a high-water-head and large-amplitude hydropower station unit speed regulator, belonging to the technical field of hydropower station speed regulator control systems.
Background
The electric opening limit generally refers to the opening limit of the guide vane through electric control, and the speed regulating system limits the opening of the guide vane of the water turbine through an electric control mode, so that the normal operation of the unit is prevented from being influenced by the overlarge opening of the guide vane. When the running water head of the water turbine generator set changes, according to a water turbine output formula P which is 9.81QH, under the condition that the output P is the same, the water head H and the flow Q are in an inverse relation, the flow Q and the opening degree of the guide vane are generally in a positive correlation, namely the water head H and the opening degree of the guide vane have the characteristic of inverse correlation. Aiming at different unit operating water heads, the corresponding guide vane opening degrees when the unit is fully loaded are different, namely when the unit operating water head changes, the guide vane electric opening limit needs to be correspondingly adjusted.
At present, a speed regulator of a high-water-head and large-amplitude hydroelectric power plant generally adopts a manual modification method to set the electrical open limit of a guide vane, so that risks of untimely modification and unreasonable setting exist, manual modification cannot accurately control the electrical open limit of the guide vane in due time according to the running state of a unit, the problems of unit startup failure, startup overspeed, limited power generation output, overload running and the like are easily caused, meanwhile, manual modification has a large misoperation risk, and the safe and stable running of the unit is seriously influenced.
Disclosure of Invention
The invention provides an electrical open-limit control method for a high-water-head and large-amplitude hydropower station unit speed regulator, aiming at the problems that the existing speed regulator guide vane electrical open-limit setting is not timely and accurate, cannot be automatically adjusted according to the change of the operation state, has large operation risk and the like.
The invention relates to a method for controlling the different running states of a unit in a classified manner, which is characterized in that the electric open limit of a guide vane is set in a correlated manner by utilizing the reverse close characteristic of the running water head and the electric open limit of the guide vane of the unit and depending on the self-adaptive function of the water head of the existing speed regulator, namely the function of the speed regulator for automatically identifying the actual running water head of the unit, so that the accurate control of the no-load state, the power generation state and the electric open limit of the guide vane in the starting process of the speed regulator is realized.
The invention is realized by the following technical scheme: an electrical open-limit control method for a high-head and large-amplitude hydropower station unit speed regulator comprises the following steps:
(1) carrying out data statistics on the actual operation working conditions of the unit, finding out the guide vane opening degree of the unit in an idle state and the guide vane opening degree of the unit in a maximum load state under each operation water head, setting the guide vane opening degrees as the idle opening degree and the maximum opening degree, and forming a data statistics table;
(2) inquiring the statistical table value in the step (1) by using a table look-up method according to the self-adaptive function of the water head of the speed regulator of the power plant, and automatically setting the correlation between the running water head of the unit received by the speed regulator and the no-load opening degree and the maximum opening degree to obtain the no-load opening degree or the maximum opening degree corresponding to the current running water head;
the method can not accurately correspond to the no-load opening or the maximum opening, accurately calculates the no-load opening or the maximum opening of the current water head according to a linear interpolation method, and realizes the accurate setting of the no-load opening or the maximum opening under each running water head:
linear interpolation formula
Figure BDA0003416125140000021
I.e. no-load or maximum opening corresponding to the head H
Figure BDA0003416125140000022
Wherein: h1、H2The boundary value of the interval in which the water head H is located in the statistical data, Y1、Y2Respectively corresponding to water heads of H1、H2The idle opening or maximum opening;
(3) by utilizing the corresponding relation between the water head of the speed regulator and the electrical opening limit of the guide vane, namely the reverse correlation characteristic between the running water head of the unit and the electrical opening limit of the guide vane, namely the characteristic that a certain water head value corresponds to a certain corresponding electrical opening limit of the guide vane and the electrical opening limit value of the guide vane is reduced along with the increase of the water head, the value after the amplification processing of the no-load opening degree or the maximum opening degree value of the unit is used as the electrical opening limit of the guide vane in the no-load state or the maximum load state of the unit:
A. in the no-load state, the no-load opening degree Y corresponding to a certain water head H is obtained through the step (2)No loadFurther obtain the electrical open limit Y of the guide vaneNo load max＝k×YNo loadK is a correction coefficient, k is more than 1.0 and less than 1.5, YNo loadThe no-load opening degree is obtained;
B. in the power generation state, the maximum opening degree Y corresponding to a certain water head H is obtained through the step (2)Maximum ofFurther obtain the electrical open limit Y of the guide vanePower generation max＝YMaximum of+ delta, delta being correction factor, 1 & ltdelta & lt 10 and Ymax≤100，YMaximum ofIs the maximum opening degree;
(4) obtaining the electric open limit Y of the guide vane in the step (3)No load maxAnd electric open limit Y of guide vanePower generationmaxAnd then, setting the maximum value of the opening value Y of the output guide vane of the speed regulator according to the state of the unit:
A. in the no-load state, the maximum value of the opening value Y of the output guide vane of the speed regulator is set as YNo load maxThe electric limitation of the opening degree of the guide vane when the unit is in a no-load state is realized;
B. setting the maximum value of the opening value Y of the output guide vane of the speed regulator to Y in the power generation statePower generation maxAnd the electrical limitation of the opening of the guide vane in the generating state of the unit is realized.
The control method of the speed regulating system in the starting process mainly adopts guide vane opening open-loop control, namely, the opening of the guide vane is controlled and changed within a certain time, so that the unit is stably accelerated to the rated rotating speed. The optimal starting rule of the unit is found out by combining a turbine rotating wheel dynamic stress test, namely the rule that the opening degree of the guide vane changes along with the rotating speed, and the method for controlling the electrical opening limit of the guide vane by dividing the rotating speed threshold is used, so that the accurate control of the electrical opening limit of the sectional guide vane in the starting process is realized, the unit is ensured to be started and synchronized quickly, and the running risk of the unit that the unit fails to start or is over-speeded is avoided.
The control operation when the unit is started is as follows: when the set is started, the guide vane is gradually opened at a certain speed v and shows a slope linear action trend, and the accurate control of the electrical open limit of the multi-section guide vane is realized by combining a rotating speed threshold, namely combining a dynamic stress test of a turbine runner and changing the electrical open limit amplification coefficient k of the guide vane in the starting process1、k2And the unit frequency control boundary value f1、f2Namely, the threshold value of the rotation speed of the unit is changed, the starting rule of the unit is changed, the dynamic stress condition of the blades of the water turbine runner under different starting rules of the unit is analyzed, and the electric opening amplification coefficient k of the guide vane in the starting process corresponding to the starting rule of the unit with the minimum dynamic stress of the water turbine runner is found out1、k2And the unit frequency control boundary value f1、f2I.e. the rotational speed threshold. The guide vane no-load opening degree Y obtained through the step (2)No loadWhen the unit frequency f<f1Time, guide vane electric open limit YStart max＝k1×YNo loadSetting the opening value of the output guide vane of the speed regulator according to the calculation result; frequency f of the unit1≤f＜f2At Hz, the guide vanes are electrically openedLimit of YStart max＝k2×YNo loadSetting the opening value of the output guide vane of the speed regulator according to the calculation result; the frequency f of the rotating unit is more than or equal to f2When the speed regulator is turned into the idle state, the maximum value of the opening value Y of the output guide vane of the speed regulator is set as YNo load max。
F is1、f2The set frequency value is obtained by combining a dynamic stress test of a water turbine runner, namely the set frequency control boundary value.
K is1、k2The electric open limit amplification coefficient of the guide vane during the starting process corresponding to the set starting rule with the minimum dynamic stress of the water turbine runner.
The invention has the advantages and effects that: by using the method, the speed regulator can realize the classified control of the electric limit opening of the guide vane according to the running state of the unit through the identified unit state, and respectively and accurately control the electric limit opening of the guide vane in the no-load state, the power generation state and the starting process of the unit. The speed regulation is through the accurate control to the electric limit of opening of stator, makes the electric limit of opening of stator follow the water head and changes and set up automatically, has realized the electric accurate control of opening of stator under the different unit running state, has solved the manual work and has set up the electric limit of opening inaccurate, untimely problem, reduces the operation risk of unit start failure or overspeed, has avoided electric limit of opening to set up the risk of the limit of exerting oneself or overload operation of improper unit, effectively ensures the unit steady operation.
Drawings
FIG. 1 is a linear interpolation relation graph of the unit operation water head and the guide vane electrical open limit in embodiment 1;
fig. 2 is a control diagram of the electrical open limit of the guide vanes in the startup process of embodiment 1.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
(1) Data statistics is carried out on the actual operation working conditions of the unit, the guide vane opening degree of the unit in an idle state and the guide vane opening degree of the unit in a maximum load under each operation water head are found, the guide vane opening degrees and the guide vane opening degrees are set as the idle opening degree and the maximum opening degree, a data statistics table is formed, in the embodiment, the parameters of the power plant in a small bay for counting the idle opening degree and the maximum opening degree under each water head are taken as an example, and the following table 1 is shown:
Figure BDA0003416125140000041
(2) inquiring the statistical table value in the step (1) by using a table look-up method according to the self-adaptive function of the water head of the speed regulator of the power plant, and automatically setting the correlation between the running water head of the unit received by the speed regulator and the no-load opening degree and the maximum opening degree to obtain the no-load opening degree or the maximum opening degree corresponding to the current running water head; for example, the governor receives a maximum opening degree of 96% when the unit operating head is 2270 decimeters;
the no-load opening degree or the maximum opening degree under the current waterhead can be inquired by using a table look-up method, but because of the discreteness of statistical data, when the operating waterhead is in the parameter interval of the upper table, the adjacent waterhead can only be roughly used to correspond to the no-load opening degree or the maximum opening degree, and the no-load opening degree or the maximum opening degree cannot be accurately corresponding to the operation waterhead: if the water head is 2300 decimeters, the specific maximum opening degree cannot be inquired, and the maximum opening degree value 89% corresponding to 2390 decimeters can be used as the maximum opening degree value under the water head approximately, so that the method is not accurate;
because the no-load opening degree or the maximum opening degree can be approximately considered to be in a linear proportional change trend along with the water head when the unit operates in a small-range water head interval, as shown in fig. 1, the no-load opening degree or the maximum opening degree of the current water head can be accurately calculated according to a linear interpolation method, and the accurate setting of the no-load opening degree or the maximum opening degree under each operating water head is realized:
linear interpolation formula
Figure BDA0003416125140000042
I.e. no-load or maximum opening corresponding to the head H
Figure BDA0003416125140000043
Wherein: h1、H2The boundary value of the interval in which the water head H is located in the statistical data, Y1、Y2Respectively corresponding to water heads of H1、H2The idle opening or maximum opening;
if the water head H is 2300 decimeters, looking up the table to know the H corresponding to the H12270 dm, H2And (2) calculating the no-load opening degree corresponding to the water head H by using a linear interpolation method, namely 2390 decimeters:
Figure BDA0003416125140000051
calculating the maximum opening corresponding to the known water head H:
Figure BDA0003416125140000052
when the water head value is in the numerical range of the statistical table, the calculation of the no-load opening degree or the maximum opening degree value can be more accurate by applying a linear interpolation method on the basis of a table look-up method;
(3) by utilizing the corresponding relation between the water head of the speed regulator and the electrical opening limit of the guide vane, namely the reverse correlation characteristic between the running water head of the unit and the electrical opening limit of the guide vane, a certain water head value corresponds to a certain corresponding electrical opening limit of the guide vane, and according to the running experience, the value obtained after the amplification treatment of the no-load opening degree or the maximum opening degree value of the unit is generally used as the electrical opening limit of the guide vane when the unit is in an no-load state or a maximum load state:
A. in the no-load state, the no-load opening degree Y corresponding to the water head H of 2300 decimeters is obtained through the step (2)No load15.3%, and obtaining the electric limit of the guide vane YNo load max＝k×YNo loadK is a correction coefficient, k is more than 1.0 and less than 1.5, YNo loadThe no-load opening degree is obtained; the guide vane electric open limit Y of the small bay power plant unit of the embodiment is in the no-load stateNo load max＝1.2×YNo load1.2 × 15.3% ═ 18.36%; the k value is selected according to the running characteristics of the unit;
B. in the power generation state, the maximum opening degree Y corresponding to the water head H of 2300 decimeters is obtained in the step (2)Maximum of94.25%, and obtaining the electric limit of the guide vane YPower generation max＝YMaximum of+ delta, delta being correction factor, 1 & ltdelta & lt 10 and YPower generation max≤100，YMaximum ofTo the maximum opening degree, Y is obtainedPower generation max94.25% + 2% + 96.25%; the delta value is selected according to the running characteristics of the unit;
(4) obtaining the electric open limit Y of the guide vane in the step (3)No load maxAnd electric open limit Y of guide vanePower generation maxAnd then, setting the maximum value of the opening value Y of the output guide vane of the speed regulator according to the state of the unit:
A. in the no-load state, when the water head is H2300 decimeters, the maximum value of the opening value Y of the output guide vane of the speed regulator is set as YNo load max18.36%, realizing the electrical limitation of the opening degree of the guide vane when the unit is in the no-load state;
B. in the power generation state, when the water head is H2300 decimeters, the maximum value of the opening value Y of the output guide vane of the speed regulator is set as YPower generation max96.25%, realizing the electrical limitation of the opening of the guide vane in the generating state of the unit;
(5) in the embodiment, according to the unit characteristics, the dynamic stress test of the rotating wheel of the combined water turbine of the Bay power plant is carried out by changing the electrical open-limit amplification coefficient k of the guide vane during the starting process1、k2And the unit frequency control boundary value f1、f2Namely, the threshold value of the rotation speed of the unit is changed, the starting rule of the unit is changed, the dynamic stress condition of the blades of the water turbine runner under different starting rules of the unit is analyzed, and the electric opening amplification coefficient k of the guide vane in the starting process corresponding to the starting rule of the unit with the minimum dynamic stress of the water turbine runner is found out1＝1.4、k21.3 and a unit frequency control limit value f1＝45Hz、f247.5Hz, the rotational speed threshold.
When a bay power plant is started, the guide vanes are gradually opened at the speed of 0.25% of the opening degree of the guide vanes per second, the guide vanes are in the trend of slope linear action, when a water head H is 2300 decimeters, when the frequency of a unit is less than 45Hz, the electrical opening limit of the guide vanes is 1.4 times of no-load opening degree, namely the electrical opening limit Y of the guide vanesStart maxSetting the opening value of the output guide vane of the speed regulator according to the calculation result, wherein the opening value is 1.4 multiplied by 15.3 percent and 21.42 percent; when the frequency of the unit is more than or equal to 45Hz and less than 47.5Hz, the electric open limit of the guide vane is 1.3 times of no-load opening degree, namely the electric open limit Y of the guide vaneStart maxThe opening value of output guide vane of speed regulator is set according to the calculation result of 1.3X 15.3% ~ 19.89%(ii) a When the frequency of the set is more than or equal to 47.5Hz, the set is converted into an idle load state, and the maximum value of the opening degree value Y of the output guide vane of the speed regulator is set as YNo load max. As shown in fig. 2.

Claims (4)

1. An electrical open-limit control method for a high-head and large-amplitude hydropower station unit speed regulator is characterized by comprising the following steps:
(1) carrying out data statistics on the actual operation working conditions of the unit, finding out the guide vane opening degree of the unit in an idle state and the guide vane opening degree of the unit in a maximum load state under each operation water head, setting the guide vane opening degrees as the idle opening degree and the maximum opening degree, and forming a data statistics table;
(2) inquiring the statistical table value in the step (1) by using a table look-up method according to the self-adaptive function of the water head of the speed regulator of the power plant, and automatically setting the correlation between the running water head of the unit received by the speed regulator and the no-load opening degree and the maximum opening degree to obtain the no-load opening degree or the maximum opening degree corresponding to the current running water head;
the method can not accurately correspond to the no-load opening or the maximum opening, accurately calculates the no-load opening or the maximum opening of the current water head according to a linear interpolation method, and realizes the accurate setting of the no-load opening or the maximum opening under each running water head:
linear interpolation formula
Figure FDA0003416125130000011
I.e. no-load or maximum opening corresponding to the head H
Figure FDA0003416125130000012
Wherein: h1、H2The boundary value of the interval in which the water head H is located in the statistical data, Y1、Y2Respectively corresponding to water heads of H1、H2The idle opening or maximum opening;
(3) by utilizing the corresponding relation between the water head of the speed regulator and the electrical opening limit of the guide vane, namely the reverse correlation characteristic between the running water head of the unit and the electrical opening limit of the guide vane, namely the characteristic that a certain water head value corresponds to a certain corresponding electrical opening limit of the guide vane and the electrical opening limit value of the guide vane is reduced along with the increase of the water head, the value after the amplification processing of the no-load opening degree or the maximum opening degree value of the unit is used as the electrical opening limit of the guide vane in the no-load state or the maximum load state of the unit:
A. in the no-load state, the no-load opening degree Y corresponding to a certain water head H is obtained through the step (2)No loadFurther obtain the electrical open limit Y of the guide vaneNo load max＝k×YNo loadK is a correction coefficient, k is more than 1.0 and less than 1.5, YNo loadThe no-load opening degree is obtained;
B. in the power generation state, the maximum opening degree Y corresponding to a certain water head H is obtained through the step (2)Maximum ofFurther obtain the electrical open limit Y of the guide vanePower generation max＝YMaximum of+ delta, delta being correction factor, 1 & ltdelta & lt 10 and Ymax≤100，YMaximum ofIs the maximum opening degree;
(4) obtaining the electric open limit Y of the guide vane in the step (3)No load maxAnd electric open limit Y of guide vaneMax of electric power generationAnd then, setting the maximum value of the opening value Y of the output guide vane of the speed regulator according to the state of the unit:
A. in the no-load state, the maximum value of the opening value Y of the output guide vane of the speed regulator is set as YNo load maxThe electric limitation of the opening degree of the guide vane when the unit is in a no-load state is realized;
B. setting the maximum value of the opening value Y of the output guide vane of the speed regulator to Y in the power generation statePower generation maxAnd the electrical limitation of the opening of the guide vane in the generating state of the unit is realized.
2. The electrical open-limit control method of the speed regulator of the high-water-head large-amplitude hydropower station unit according to claim 1, which is characterized by comprising the following steps of: the control operation when the unit is started is as follows: when the unit is started, the guide vane is gradually opened at a certain speed v, and the guide vane no-load opening Y obtained in the step (2)No loadWhen the unit frequency f<f1Time, guide vane electric open limit YStart max＝k1×YNo loadSetting the opening value of the output guide vane of the speed regulator according to the calculation result; frequency f of the unit1≤f＜f2At Hz, the guide vane is electrically openStart max＝k2×YNo loadSetting governor output guide vane opening according to the calculation resultA value of the metric; the frequency f of the rotating unit is more than or equal to f2When the speed regulator is turned into the idle state, the maximum value of the opening value Y of the output guide vane of the speed regulator is set as YNo load max。
3. The electrical open-limit control method of the speed regulator of the high-head and large-amplitude hydropower station set according to claim 2, characterized by comprising the following steps of: f is1、f2The set frequency value is obtained by combining a dynamic stress test of a water turbine runner, namely the set frequency control boundary value.
4. The high-head large-amplitude hydropower station unit speed regulator electrical open-limit control method according to claim 2, characterized in that: k is1、k2The electric open limit amplification coefficient of the guide vane during the starting process corresponding to the set starting rule with the minimum dynamic stress of the water turbine runner.
CN202111547428.4A 2021-12-16 2021-12-16 Electric open-limit control method for speed regulator of high-head and large-amplitude hydropower station unit Pending CN114483432A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111547428.4A CN114483432A (en) 2021-12-16 2021-12-16 Electric open-limit control method for speed regulator of high-head and large-amplitude hydropower station unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111547428.4A CN114483432A (en) 2021-12-16 2021-12-16 Electric open-limit control method for speed regulator of high-head and large-amplitude hydropower station unit

Publications (1)

Publication Number Publication Date
CN114483432A true CN114483432A (en) 2022-05-13

Family

ID=81493814

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111547428.4A Pending CN114483432A (en) 2021-12-16 2021-12-16 Electric open-limit control method for speed regulator of high-head and large-amplitude hydropower station unit

Country Status (1)

Country Link
CN (1) CN114483432A (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1734085A (en) * 2004-08-13 2006-02-15 武汉事达电气股份有限公司 Double-channel cross redundancy system for digital microcomputer governor of large-scale hydroturbine
CN102437809A (en) * 2011-12-14 2012-05-02 国网电力科学研究院 Method for controlling speed regulating system of hydroelectric unit in island mode
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
CN108035838A (en) * 2017-12-07 2018-05-15 武汉四创自动控制技术有限责任公司 Full factory's Turbine Governor System health state evaluation and optimization method
CN108708818A (en) * 2018-04-11 2018-10-26 中国长江电力股份有限公司 A kind of governor head and no-load opening combination curve self-correction self-adaptation control method
CN109253041A (en) * 2018-09-12 2019-01-22 华能澜沧江水电股份有限公司糯扎渡水电厂 A kind of the head control system and method for hydrogenerator governor
CN112392650A (en) * 2020-10-23 2021-02-23 桑河二级水电有限公司 Control method for low-frequency suppression during load shedding of bulb tubular unit and storage medium
CN113123920A (en) * 2021-04-21 2021-07-16 雅砻江流域水电开发有限公司 Method for preventing limiting fluctuation of opening degree of guide vane of speed regulator
CN113623127A (en) * 2021-09-14 2021-11-09 中国长江电力股份有限公司 Method for controlling working state of electric control system of speed regulator of hydroelectric generating set in one-key opening guide vane drainage mode of monitoring system

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1734085A (en) * 2004-08-13 2006-02-15 武汉事达电气股份有限公司 Double-channel cross redundancy system for digital microcomputer governor of large-scale hydroturbine
CN102437809A (en) * 2011-12-14 2012-05-02 国网电力科学研究院 Method for controlling speed regulating system of hydroelectric unit in island mode
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
CN108035838A (en) * 2017-12-07 2018-05-15 武汉四创自动控制技术有限责任公司 Full factory's Turbine Governor System health state evaluation and optimization method
CN108708818A (en) * 2018-04-11 2018-10-26 中国长江电力股份有限公司 A kind of governor head and no-load opening combination curve self-correction self-adaptation control method
CN109253041A (en) * 2018-09-12 2019-01-22 华能澜沧江水电股份有限公司糯扎渡水电厂 A kind of the head control system and method for hydrogenerator governor
CN112392650A (en) * 2020-10-23 2021-02-23 桑河二级水电有限公司 Control method for low-frequency suppression during load shedding of bulb tubular unit and storage medium
CN113123920A (en) * 2021-04-21 2021-07-16 雅砻江流域水电开发有限公司 Method for preventing limiting fluctuation of opening degree of guide vane of speed regulator
CN113623127A (en) * 2021-09-14 2021-11-09 中国长江电力股份有限公司 Method for controlling working state of electric control system of speed regulator of hydroelectric generating set in one-key opening guide vane drainage mode of monitoring system

Similar Documents

Publication Publication Date Title
US7586205B2 (en) Method and system for regulation of the rotational speed of a rotor on a wind turbine
Merabet et al. Torque and pitch angle control for variable speed wind turbines in all operating regimes
MX2011000030A (en) Power curtailment of wind turbines.
CN102374118B (en) Power control method for wind generating set
CN107394817B (en) Method and system for wind power to participate in frequency modulation of power system
CN112412691A (en) Primary frequency modulation method for speed regulator of variable-speed pumped storage unit
Pradhan et al. Enhancement in primary frequency contribution using dynamic deloading of wind turbines
CN110374807B (en) Soft shutdown control method for wind generating set and wind generating set
CN105634009A (en) Frequency modulation method for hydraulic power plant
CN108700019B (en) Method, system and device for operating a hydraulic turbine
CN113039359A (en) Method for controlling a wind turbine and corresponding wind turbine
EP3580448B1 (en) Improvements to the stabilization of hydraulic machines with s-zone characteristics
CN108512233B (en) Actual water head-based primary frequency modulation calculation method for hydroelectric generating set
CN114483432A (en) Electric open-limit control method for speed regulator of high-head and large-amplitude hydropower station unit
CN114725956A (en) Improved method for regulating frequency of hydroelectric generating set under no-load working condition
Van et al. Ouput power smoothening of variable-speed wind turbine systems by pitch angle control
Egoigwe et al. Application of a fuzzy logic controller for hydropower generator speed regulation
CN103089539B (en) Adjusting method of wind generating set power
Van et al. Adaptive fuzzy logic control to enhance pitch angle controller for variable-speed wind turbines
CN107110104B (en) Method for stabilizing the rotational speed of a hydraulic machine with S characteristics and device for converting hydraulic energy into electrical energy
WO2020120008A1 (en) Method and controller for full-power control of a wind turbine
CN111555679A (en) Alternating-current excitation variable-speed pumped storage unit control system and method
JP4394422B2 (en) Horizontal axis wind turbine and control method thereof
CN113464354B (en) Water turbine control method applied to hydropower station with long pressurized water diversion channel
CN114156911A (en) Primary frequency modulation performance optimization method under hydroelectric generating set opening degree mode

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination