CN108649616A - Generating set load serial burning control control method and system based on mains frequency variation - Google Patents
Generating set load serial burning control control method and system based on mains frequency variation Download PDFInfo
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- CN108649616A CN108649616A CN201810419926.2A CN201810419926A CN108649616A CN 108649616 A CN108649616 A CN 108649616A CN 201810419926 A CN201810419926 A CN 201810419926A CN 108649616 A CN108649616 A CN 108649616A
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- load
- pid controller
- frequency
- setting value
- mains frequency
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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
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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
- H02J3/24—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)
Abstract
The invention discloses a kind of generating set load serial burning control control method and system based on mains frequency variation, mains frequency setting value and mains frequency instantaneous value difference pushing electric network frequency PID controller and tracking judgment module；Deviation, which is obtained, according to mains frequency setting value and power grid instantaneous value calculates frequency PID controller operating status Rule of judgment automatically；When the two deviation reaches a certain threshold condition, frequency PID controller is completed from the switching for tracing into automatic adjustment；When in automatic adjustment state, the output of PID controller is adjusted according to mains frequency setting value and the deviation of mains frequency instantaneous value dynamic, corrects the load setting value of unit load PID controller；Otherwise, it is 0 to export, and mains frequency PID controller does not correct the load setting value of unit load PID controller；The load setting value of load PID controller receives frequency PID controller output generates corresponding load adjustment instruction in conjunction with the load instantaneous value of reception.
Description
Technical field
The present invention relates to a kind of generating set load serial burning control control methods and system based on mains frequency variation.
Background technology
With new technology, the mature of new equipment in electric system, heavy-duty generator group has been in power construction at present
The leading position of power supply supply is accounted for, wind-power electricity generation, photovoltaic generation and nuclear energy power generation are quickly grown, while long range, large capacity
UHV transmission line be also widely applied, larger variation has occurred in entire NETWORK STRUCTURE PRESERVING POWER SYSTEM.
Novel NETWORK STRUCTURE PRESERVING POWER SYSTEM is pushing power technology to develop, resource is energy-saving, is improving environment etc. economy
Social benefit is notable, but under new electric structure situation, the pressure of power grid high-quality stable operation is also increasing, such as great Rong
It is unfavorable that the protection blocking of the unplanned outage, extra high voltage line of measuring generating set brings the safe and stable operation of regional power grid
It influences, the supply load of wind-power electricity generation area of concentration, which can exist, demodulates peak phenomenon, therefore how in new NETWORK STRUCTURE PRESERVING POWER SYSTEM shape
Under formula, timely Optimal improvements power equipment control technical solution, it is in a period of time from now on to promote power grid operation ability
One important technology project.
Invention content
The present invention is to solve the above-mentioned problems, it is proposed that a kind of generating set load serial burning control control based on mains frequency variation
Method and system processed, the present invention can promote generating set and quickly change certainly when generating set load is in mains frequency fluctuation
Body generated output, adjustment operation of power networks frequency return the ability of normal operation range.
To achieve the goals above, the present invention adopts the following technical scheme that：
A kind of generating set load serial burning control control system based on mains frequency variation, including frequency PID controller, tracking
Judgment module and load PID controller, wherein：
The tracking judgment module, is configured as receives frequency setting value and instantaneous value, and frequency is determined according to the two deviation
PID controller operating status Rule of judgment, determines the working condition of frequency PID controller；
The frequency PID controller is configured as receives frequency setting value and instantaneous value, receives sentencing for tracking judgment module
Broken strip part is as a result, switching oneself state determines unit load PID controls according to the two deviation dynamic and oneself state adjustment output
The load setting value of device processed；
The load PID controller is configured as the load setting value of receives frequency PID controller output, in conjunction with reception
Load instantaneous value, generate the instruction of corresponding load adjustment.
Further, the tracking judgment module, when the deviation of frequency setting value and instantaneous value reaches given threshold condition
When, frequency PID controller completes the switching from tracking mode to automatic adjustment state.
Further, when frequency PID controller is in automatic adjustment state, according to mains frequency setting value and power grid frequency
The deviation dynamic of rate instantaneous value adjusts the output of PID controller, corrects the load setting value of unit load PID controller；Work as electricity
When net frequency PID controller is in tracking mode, it is 0 to export, and mains frequency PID controller does not correct unit load PID control
The load setting value of device.
Further, the frequency PID controller utilizes the different output result of input switching.
Further, the output of the frequency PID controller inputs to load PID controller after clipping module.
Further, the output valve of the frequency PID controller after amplitude limit passes through ADD with initially set load setting value
Module is transferred to load PID controller after being added summation, as final load setting value.
Further, the load PID controller is according to unit load design setting value and unit load instantaneous value deviation
Dynamic regulation is carried out, the load adjusting device of output order to generating set changes unit load and contributes, makes unit actual load
Equal to actual load setting value, the quick adjusting of unit load is completed.
Working method based on above system, includes the following steps：
(1) mains frequency setting value judges mould with mains frequency instantaneous value difference pushing electric network frequency PID controller and tracking
Block；
(2) deviation is obtained according to mains frequency setting value and power grid instantaneous value and calculates frequency PID controller operating status automatically
Rule of judgment；When the two deviation reaches a certain threshold condition, frequency PID controller is completed from tracing into cutting for automatic adjustment
It changes；
(3) when mains frequency PID controller is in automatic adjustment state, according to mains frequency setting value and mains frequency
The deviation dynamic of instantaneous value adjusts the output of PID controller, corrects the load setting value of unit load PID controller；Work as power grid
When frequency PID controller is in tracking mode, it is 0 to export, and mains frequency PID controller does not correct unit load PID controller
Load setting value；
(4) the load setting value of load PID controller receives frequency PID controller output, the load in conjunction with reception are real-time
Value generates corresponding load adjustment instruction.
Further, mains frequency setting value dynamic is set, and frequency instantaneous value is power grid real time execution frequency.
Preferably 50Hz.
Switching threshold be (0-0.2].
Compared with prior art, beneficial effects of the present invention are：
Mains frequency variation is introduced into the closed-loop control system of unit load by the present invention, forms the tandem control of unit load
System adjusts circuit according to the size dynamic corrections unit load of frequency fluctuation deviation, improves unit in mains frequency fluctuation
Load is regulated the speed, and the frequency modulation peak modulation capacity of power grid is enhanced.Control system parameter of the present invention only with the generation load of unit and
The running frequency of power grid is reference, therefore the technical solution has extensive fit in the generating equipments such as thermal power generation, wind-power electricity generation
The property used.
Description of the drawings
The accompanying drawings which form a part of this application are used for providing further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation do not constitute the improper restriction to the application for explaining the application.
Fig. 1 is the generating set load serial burning control Control system architecture schematic diagram changed based on mains frequency.
Specific implementation mode：
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific implementation mode, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or combination thereof.
In the present invention, term for example "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", " side ",
The orientation or positional relationship of the instructions such as "bottom" is to be based on the orientation or positional relationship shown in the drawings, only to facilitate describing this hair
Bright each component or component structure relationship and the relative of determination, not refer in particular to either component or element in the present invention, cannot understand
For limitation of the present invention.
In the present invention, term such as " affixed ", " connected ", " connection " shall be understood in a broad sense, and indicate may be a fixed connection,
Can also be to be integrally connected or be detachably connected；It can be directly connected, it can also be indirectly connected through an intermediary.For
The related scientific research of this field or technical staff can determine the concrete meaning of above-mentioned term in the present invention as the case may be,
It is not considered as limiting the invention.
For generating set load in mains frequency fluctuation, how to promote generating set and quickly change self generating
Power, adjustment operation of power networks frequency return the ability of normal operation range, and the present invention provides a set of based on mains frequency variation
Generating set load serial burning control control system, structure principle chart is as shown in Figure 1, include mainly mains frequency PID controller, unit
Load PID controller, frequency adjust the modules such as fling-cut switch.
Work step is as follows：
(1) mains frequency setting value judges mould with mains frequency instantaneous value difference pushing electric network frequency PID controller and tracking
Block.Mains frequency setting value can dynamically be set, and generally be fixed as 50Hz in China, frequency instantaneous value is power grid real time execution frequency
Rate.
(2) mains frequency PID controller, when mains frequency PID controller is in automatic adjustment state, according to power grid frequency
Rate setting value and the deviation of mains frequency instantaneous value dynamic adjust the output of PID controller, correct unit load PID controller
Load setting value；When mains frequency PID controller is in tracking mode, it is 0 to export, and mains frequency PID controller is not corrected
The load setting value of unit load PID controller.
(3) frequency PID controller tracks judgment module, and it is automatic to obtain deviation according to mains frequency setting value and power grid instantaneous value
Calculate frequency PID controller operating status Rule of judgment.When the two deviation reaches a certain threshold condition, frequency PID controller
It completes from the switching for tracing into automatic adjustment, switching threshold is generally 0-0.2, and this programme switching threshold is set as 0.033.Frequency
PID controller working condition is as shown in table 1.
1 frequency PID controller working condition table of table
(4) frequency adjusts fling-cut switch module, can carry out manual switching by operations staff, is controlled when needing input frequency PID
When system is modified the setting value of unit load PID controller, the function is put into, frequency PID controller output valve is through amplitude limit mould
Block is sent to the setting value of unit load PID controller；When cutting off the function, system mask frequency PID controller output valve, no
The setting value of unit load PID controller is modified.
(5) clipping module carries out amplitude limit to frequency PID controller output valve, limits and set to unit load PID controller
The extent of amendment of value ensures the stable operation of system.
(6) ADD module, by unit load setting value and frequency PID controller to the correction value of unit load setting value into
Row summation, produces the actual setpoint of unit load PID controller.
(7) unit load PID controller, according to unit load design setting value and unit load instantaneous value deviation into action
State is adjusted, the load adjusting device of output order to generating set, is changed unit load and is contributed, and so that unit actual load is equal to real
Border load setting value completes the quick adjusting of unit load.
The foregoing is merely the preferred embodiments of the application, are not intended to limit this application, for the skill of this field
For art personnel, the application can have various modifications and variations.Within the spirit and principles of this application, any made by repair
Change, equivalent replacement, improvement etc., should be included within the protection domain of the application.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (10)
1. a kind of generating set load serial burning control control system based on mains frequency variation, it is characterized in that：Including frequency PID control
Device, tracking judgment module and load PID controller, wherein：
The tracking judgment module, is configured as receives frequency setting value and instantaneous value, and frequency PID controls are determined according to the two deviation
Device operating status Rule of judgment processed, determines the working condition of frequency PID controller；
The frequency PID controller is configured as receives frequency setting value and instantaneous value, receives the judgement item of tracking judgment module
Part is as a result, switching oneself state determines unit load PID controller according to the two deviation dynamic and oneself state adjustment output
Load setting value；
The load PID controller is configured as the load setting value of receives frequency PID controller output, in conjunction with the negative of reception
Lotus instantaneous value generates corresponding load adjustment instruction.
2. a kind of generating set load serial burning control control system based on mains frequency variation as described in claim 1, feature
It is：The tracking judgment module, when the deviation of frequency setting value and instantaneous value reaches given threshold condition, frequency PID control
Device completes the switching from tracking mode to automatic adjustment state.
3. a kind of generating set load serial burning control control system based on mains frequency variation as described in claim 1, feature
It is：When frequency PID controller is in automatic adjustment state, according to the deviation of mains frequency setting value and mains frequency instantaneous value
Dynamic adjusts the output of PID controller, corrects the load setting value of unit load PID controller；When mains frequency PID controller
When in tracking mode, it is 0 to export, and mains frequency PID controller does not correct the load setting value of unit load PID controller.
4. a kind of generating set load serial burning control control system based on mains frequency variation as described in claim 1, feature
It is：The frequency PID controller utilizes the different output result of input switching.
5. a kind of generating set load serial burning control control system based on mains frequency variation as described in claim 1, feature
It is：The output of the frequency PID controller inputs to load PID controller after clipping module.
6. a kind of generating set load serial burning control control system based on mains frequency variation as claimed in claim 5, feature
It is：The output valve of frequency PID controller after amplitude limit passes after being added summation by ADD module with initially set load setting value
It is defeated by load PID controller, as final load setting value.
7. a kind of generating set load serial burning control control system based on mains frequency variation as described in claim 1, feature
It is：The load PID controller carries out dynamic regulation according to unit load design setting value and unit load instantaneous value deviation, defeated
Go out instruction to the load adjusting device of generating set, changes unit load and contribute, unit actual load is made to be set equal to actual load
Definite value completes the quick adjusting of unit load.
8. based on the working method of the system as described in any one of claim 1-7, it is characterized in that：Include the following steps：
(1) mains frequency setting value and mains frequency instantaneous value difference pushing electric network frequency PID controller and tracking judgment module；
(2) deviation is obtained according to mains frequency setting value and power grid instantaneous value and calculates the judgement of frequency PID controller operating status automatically
Condition；When the two deviation reaches a certain threshold condition, frequency PID controller is completed from the switching for tracing into automatic adjustment；
(3) real-time according to mains frequency setting value and mains frequency when mains frequency PID controller is in automatic adjustment state
The deviation dynamic of value adjusts the output of PID controller, corrects the load setting value of unit load PID controller；Work as mains frequency
When PID controller is in tracking mode, it is 0 to export, and mains frequency PID controller does not correct the negative of unit load PID controller
Lotus setting value；
(4) the load setting value of load PID controller receives frequency PID controller output, it is raw in conjunction with the load instantaneous value of reception
It is instructed at corresponding load adjustment.
9. working method as claimed in claim 8, it is characterized in that：Mains frequency setting value dynamic is set, and frequency instantaneous value is
Power grid real time execution frequency.
10. working method as claimed in claim 8, it is characterized in that：Switching threshold be (0-0.2].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810419926.2A CN108649616A (en) | 2018-05-04 | 2018-05-04 | Generating set load serial burning control control method and system based on mains frequency variation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810419926.2A CN108649616A (en) | 2018-05-04 | 2018-05-04 | Generating set load serial burning control control method and system based on mains frequency variation |
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| CN108649616A true CN108649616A (en) | 2018-10-12 |
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| CN201810419926.2A Pending CN108649616A (en) | 2018-05-04 | 2018-05-04 | Generating set load serial burning control control method and system based on mains frequency variation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112803438A (en) * | 2021-02-25 | 2021-05-14 | 中国五环工程有限公司 | Frequency control system and method for multiple generators in isolated network operation power plant |
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| CN101997312A (en) * | 2010-12-08 | 2011-03-30 | 浙江省电力试验研究院 | Method for quickly and effectively inhibiting frequency fluctuation of island power grid |
| US20140375054A1 (en) * | 2013-06-24 | 2014-12-25 | Industrial Cooperation Foundation Chonbuk National University | Method of controlling inertia in wind farm |
| CN107611977A (en) * | 2017-08-31 | 2018-01-19 | 国网山东省电力公司电力科学研究院 | Industrial thermic load group participates in the control system and method for primary frequency regulation of power network |
| CN107769275A (en) * | 2017-11-14 | 2018-03-06 | 国网山东省电力公司电力科学研究院 | The load coordinated control system and method for wind-power electricity generation and thermoelectric generator group |
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2018
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101105520A (en) * | 2007-08-08 | 2008-01-16 | 陕西电力科学研究院 | Generating set primary frequency regulation test method and emulating instrument for test |
| CN101997312A (en) * | 2010-12-08 | 2011-03-30 | 浙江省电力试验研究院 | Method for quickly and effectively inhibiting frequency fluctuation of island power grid |
| US20140375054A1 (en) * | 2013-06-24 | 2014-12-25 | Industrial Cooperation Foundation Chonbuk National University | Method of controlling inertia in wind farm |
| CN107611977A (en) * | 2017-08-31 | 2018-01-19 | 国网山东省电力公司电力科学研究院 | Industrial thermic load group participates in the control system and method for primary frequency regulation of power network |
| CN107769275A (en) * | 2017-11-14 | 2018-03-06 | 国网山东省电力公司电力科学研究院 | The load coordinated control system and method for wind-power electricity generation and thermoelectric generator group |
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| CN112803438A (en) * | 2021-02-25 | 2021-05-14 | 中国五环工程有限公司 | Frequency control system and method for multiple generators in isolated network operation power plant |
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Application publication date: 20181012 |
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