CN108039738A - A kind of hydroelectric generating set load control method - Google Patents

A kind of hydroelectric generating set load control method Download PDF

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Publication number
CN108039738A
CN108039738A CN201810038179.8A CN201810038179A CN108039738A CN 108039738 A CN108039738 A CN 108039738A CN 201810038179 A CN201810038179 A CN 201810038179A CN 108039738 A CN108039738 A CN 108039738A
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China
Prior art keywords
unit
value
load
power
adjuster
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CN201810038179.8A
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CN108039738B (en
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陆海
苏适
罗恩博
杨洋
严玉廷
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Electric Power Research Institute of Yunnan Power System Ltd
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Electric Power Research Institute of Yunnan Power System Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/24—Arrangements for preventing or reducing oscillations of power in networks

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Eletrric Generators (AREA)
  • Control Of Water Turbines (AREA)

Abstract

This application discloses a kind of hydroelectric generating set load control method, including obtain unit AGC instructions, unit primary frequency modulation amount and unit load；Unit AGC is instructed or local unit instructs setting value IA to be superimposed the value after processing with primary frequency modulation amount, the setting value SP using the value after superposition as power of the assembling unit adjuster by selecting hand-off process；By unit load by wave filter FILTER processing, the measured value PV using the value after processing as power of the assembling unit adjuster；Power of the assembling unit adjuster carries out computing to the setting value SP and measured value PV of input, obtains PID control output valve.The hydroelectric generating set load control method that the application provides is using segmentation pid parameter control method, and compensated for the influence that generation is changed with head non-linear to existing guide vane of Hydropower Unit own characteristic, realize Hydropower Unit quick load response control, have the advantages that to realize succinct reliable, while ensureing that hydroelectric generating set load control is quick, the stability of control is also improved.

Description

A kind of hydroelectric generating set load control method
Technical field
This application involves hydropower plant monitoring and control technical field of automation, more particularly to a kind of hydroelectric generating set load control method.
Background technology
As power generation ratio of the new energy in power grid is continuously increased, the fluctuation of new energy forms more power scheduling Big challenge.For the fluctuation of the new energy grid-connected powers such as compensation wind-powered electricity generation, photovoltaic, currently used means include improving Hydropower Unit Load change ability, i.e., carry out quick peak regulation and frequency modulation by Hydropower Unit, so as to improve receiving of the electric system to new energy Ability.
But the quick load of Hydropower Unit changes the decline for causing hydroelectric generating set load control stability.For example, Head rise, guide vane are in more sensitive load responding area, and quick load control will bring the fluctuation of machine thermoelectricity group power even Vibration.
The content of the invention
This application provides hydroelectric generating set load control method, to solve easily to send out in existing hydroelectric generating set load control The problem of life, Hydropower Unit power swing.
The hydroelectric generating set load control method that the application provides includes,
Obtain unit AGC instructions, unit primary frequency modulation amount and unit load；
Unit AGC instructions or local unit are instructed into setting value IA by selecting hand-off process, by the value after processing It is superimposed with the primary frequency modulation amount, the unit is inputted using the value after superposition as the setting value SP of the power of the assembling unit adjuster Power governor；
By the unit load by wave filter FILTER processing, the survey using the value after processing as power of the assembling unit adjuster Value PV inputs the power of the assembling unit adjuster；
The power of the assembling unit adjuster carries out the setting value SP and measured value PV of input ratio, integration and differential control and transports Calculate, obtain PID control output valve, the PID control output valve is delivered to governing system.
Preferably, the power of the assembling unit adjuster setting value SP and measured value PV of input are carried out ratio, integration with it is micro- Sub-control computing, obtains PID control output valve, specifically includes,
PID Discrete control formula are as follows：
PID control output valve
Wherein, kp-proportional gain；
Ti-the time of integration；
Td-derivative time；
Ta-actual differential inertia time；
Deviation between the setting value SP and measured value PV of Δ e-unit load；
P0-unit rated load；
K1-k6-segmentation PID overall gains.
Preferably, the compensation of gain is carried out to unit change of water level, wherein the function for gain is：
KIN=FH_P(H0)/FH_P(H),
Wherein, FH_P(H0) the load curve function of guide vane standard-sized sheet under-unit rated head,
FH_P(H) the load curve function of guide vane standard-sized sheet under-unit difference rated head,
KINThe automatic gain compensation of-unit load control input.
Preferably, before the PID control output valve being delivered to governing system, the method is further included to the PID Control output valve is modified, wherein be for modified function,
KOUT=OFV-P(P),
Wherein, FV-P(P) guide vane opening perunit value and unit load perunit value are more bent than value function under-unit rated head Line；
KOUTThe non-liner revision value of-unit allocation output.
The hydroelectric generating set load control method that the application provides is directed to hydroelectric machine using segmentation pid parameter control method The influence that generation is changed with head non-linear to existing guide vane of group own characteristic compensates, and realizes Hydropower Unit and quickly bears Lotus response control, has the advantages that realization is succinct reliable, while ensureing that hydroelectric generating set load control is quick, also improves control The stability of system.
Brief description of the drawings
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below Singly introduce, it should be apparent that, for those of ordinary skills, without creative efforts, also Other attached drawings can be obtained according to these attached drawings.
Fig. 1 is the application hydroelectric generating set load control figure.
Embodiment
Fig. 1 is the application hydroelectric generating set load control figure, as shown in Figure 1, hydroelectric generating set load control method includes,
Obtain unit AGC instructions, unit primary frequency modulation amount and unit load；
Unit AGC instructions or local unit are instructed into setting value IA by selecting hand-off process, by the value after processing It is superimposed with the primary frequency modulation amount, the unit is inputted using the value after superposition as the setting value SP of the power of the assembling unit adjuster Power governor；
By the unit load by wave filter FILTER processing, the survey using the value after processing as power of the assembling unit adjuster Value PV inputs the power of the assembling unit adjuster；
The power of the assembling unit adjuster carries out the setting value SP and measured value PV of input ratio, integration and differential control and transports Calculate, obtain PID control output valve, the PID control output valve is delivered to governing system.
In the application, the power of the assembling unit adjuster setting value SP and measured value PV of input are carried out ratio, integration with Differential controls computing, obtains PID control output valve, specifically includes,
PID Discrete control formula are as follows：
PID control output valve
Wherein, kp-proportional gain；
Ti-the time of integration；
Td-derivative time；
Ta-actual differential inertia time；
Deviation between the setting value SP and measured value PV of Δ e-unit load；
P0-unit rated load；
K1-k6-segmentation PID overall gains, under normal circumstances, k1 >=k2 >=k3 >=k4 >=k5 >=k6.
The present processes further include, and the compensation of gain is carried out to unit change of water level.In the present embodiment, with reference to hydroelectric machine Group is using the herd function of the gain modifications of PID entrance deviations, the non-linear effects produced with change of water level in replenishment control, its In, the herd function for gain is：
KIN=FH_P(H0)/FH_P(H),
Wherein, FH_P(H0) the load curve function of guide vane standard-sized sheet under-unit rated head,
FH_P(H) the load curve function of guide vane standard-sized sheet under-unit difference rated head,
KINThe automatic gain compensation of-unit load control input.
In the application, exported with reference to Hydropower Unit using PID, by amendment of the guide vane opening perunit value than value function, with Compensate the non-linear considerable influence to control of guide vane.Specific real process includes, and the PID control output valve is delivered to speed governing Before system, the method, which further includes, is modified the PID control output valve, it is used for modified function and is,
KOUT=OFV-P(P),
Wherein, FV-P(P) guide vane opening perunit value and unit load perunit value are more bent than value function under-unit rated head Line；
KOUTThe non-liner revision value of-unit allocation output.
Above-described the application embodiment does not form the restriction to the application protection domain.

Claims (4)

  1. A kind of 1. hydroelectric generating set load control method, it is characterised in that including,
    Obtain unit AGC instructions, unit primary frequency modulation amount and unit load；
    Unit AGC instructions or local unit are instructed into setting value IA by selecting hand-off process, by the value after processing and institute The superposition of primary frequency modulation amount is stated, the power of the assembling unit is inputted using the value after superposition as the setting value SP of the power of the assembling unit adjuster Adjuster；
    By the unit load by wave filter FILTER processing, the measured value using the value after processing as power of the assembling unit adjuster PV inputs the power of the assembling unit adjuster；
    The power of the assembling unit adjuster carries out ratio, integration and differential to the setting value SP and measured value PV of input and controls computing, PID control output valve is obtained, the PID control output valve is delivered to governing system.
  2. 2. according to the method described in claim 1, it is characterized in that, the power of the assembling unit adjuster to the setting value SP of input with Measured value PV carries out ratio, integration and differential control computing, obtains PID control output valve, specifically includes,
    PID Discrete control formula are as follows：
    PID control output valve
    Wherein, kp-proportional gain；
    Ti-the time of integration；
    Td-derivative time；
    Ta-actual differential inertia time；
    Deviation between the setting value SP and measured value PV of Δ e-unit load；
    P0-unit rated load；
    K1-k6-segmentation PID overall gains.
  3. 3. according to the method described in claim 1, it is characterized in that, the method further includes, unit change of water level is increased The compensation of benefit, wherein the function for gain is：
    KIN=FH_P(H0)/FH_P(H),
    Wherein, FH_P(H0) the load curve function of guide vane standard-sized sheet under-unit rated head,
    FH_P(H) the load curve function of guide vane standard-sized sheet under-unit difference rated head,
    KINThe automatic gain compensation of-unit load control input.
  4. 4. according to the method described in claim 3, it is characterized in that, by the PID control output valve be delivered to governing system it Before, the method, which further includes, is modified the PID control output valve, wherein be for modified function,
    KOUT=OFV-P(P),
    Wherein, FV-P(P) guide vane opening perunit value and unit load perunit value ratio function curve under-unit rated head；
    KOUTThe non-liner revision value of-unit allocation output.
CN201810038179.8A 2018-01-16 2018-01-16 Hydroelectric generating set load control method Active CN108039738B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109597328A (en) * 2018-11-21 2019-04-09 清华大学 Frequency modulation and automatic power generation control method, device and control system
CN110161839A (en) * 2019-05-16 2019-08-23 南京理工大学 The multi-modal method of servo-controlling of revolving table position of reflection-type laser removing foreign matter device
CN112128602A (en) * 2020-09-25 2020-12-25 江苏方天电力技术有限公司 Lubricating oil temperature control method for large phase modifier capable of inhibiting intermittent internal disturbance
CN117614028A (en) * 2023-11-22 2024-02-27 湖南三江电力有限责任公司 On-line monitoring, distributing, regulating and analyzing system for load of hydroelectric generating set

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CN105785859A (en) * 2016-03-03 2016-07-20 国网山东省电力公司电力科学研究院 Optimization control system and method ensuring primary frequency modulation motion under AGC mode of thermal power generating unit

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JP2013257279A (en) * 2012-06-14 2013-12-26 Saginomiya Seisakusho Inc Vibration controller of fatigue testing machine
CN105785859A (en) * 2016-03-03 2016-07-20 国网山东省电力公司电力科学研究院 Optimization control system and method ensuring primary frequency modulation motion under AGC mode of thermal power generating unit

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109597328A (en) * 2018-11-21 2019-04-09 清华大学 Frequency modulation and automatic power generation control method, device and control system
CN109597328B (en) * 2018-11-21 2021-02-02 清华大学 Frequency modulation and automatic power generation control method, device and control system
CN110161839A (en) * 2019-05-16 2019-08-23 南京理工大学 The multi-modal method of servo-controlling of revolving table position of reflection-type laser removing foreign matter device
CN110161839B (en) * 2019-05-16 2022-08-16 南京理工大学 Multi-mode servo control method for turntable position of reflection type laser foreign matter removing device
CN112128602A (en) * 2020-09-25 2020-12-25 江苏方天电力技术有限公司 Lubricating oil temperature control method for large phase modifier capable of inhibiting intermittent internal disturbance
CN112128602B (en) * 2020-09-25 2021-09-14 江苏方天电力技术有限公司 Lubricating oil temperature control method for large phase modifier capable of inhibiting intermittent internal disturbance
CN117614028A (en) * 2023-11-22 2024-02-27 湖南三江电力有限责任公司 On-line monitoring, distributing, regulating and analyzing system for load of hydroelectric generating set

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