CN110011331A - A method of primary frequency regulation of power network is participated in using velocity fluctuation pump - Google Patents
A method of primary frequency regulation of power network is participated in using velocity fluctuation pump Download PDFInfo
- Publication number
- CN110011331A CN110011331A CN201910250723.XA CN201910250723A CN110011331A CN 110011331 A CN110011331 A CN 110011331A CN 201910250723 A CN201910250723 A CN 201910250723A CN 110011331 A CN110011331 A CN 110011331A
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- Prior art keywords
- frequency
- pump
- velocity fluctuation
- primary
- regulation
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Eletrric Generators (AREA)
- Control Of Water Turbines (AREA)
Abstract
A kind of method participating in primary frequency regulation of power network using velocity fluctuation pump disclosed by the invention, primary frequency regulation of power network is carried out using a kind of velocity fluctuation pump frequency modulation system, velocity fluctuation pump frequency modulation system includes velocity fluctuation pump and primary frequency modulation control system, velocity fluctuation pump includes water pump, motor and frequency converter, primary frequency modulation control system includes sequentially connected rotation speed measuring module, frequency control module and frequency measuring block, when mains frequency deviation is more than the frequency dead band of setting, according to mains frequency deviation information, frequency regulator in frequency control module issues control command, i.e. corresponding revolving speed adjustment amount, in conjunction with real-time pump rotary speed, frequency converter is output to as rotary speed setting value after clipping, control motor speed, variable-ratio water pump input power is controlled with this, to adjust mains frequency.Method disclosed by the invention has expanded power grid frequency modulation resource, improves safe stability of power system, reduces electric system cost of investment, considerable economic benefit is brought to pumping plant.
Description
Technical field
The invention belongs to mains frequency control technology fields, and in particular to a kind of once to be adjusted using velocity fluctuation pump participation power grid
The method of frequency.
Background technique
With the Devoting Major Efforts To Developing of China's new energy, the accounting of wind-powered electricity generation, Photovoltaic generation installed capacity in power grid is increasing,
Its randomness, intermittence and unadjustable property reduce grid stability quickly, huge challenge are brought to power grid frequency modulation, so that electric
Net is higher and higher to the requirement on flexibility of frequency modulation, especially in the area that photovoltaic power generation and wind-powered electricity generation are concentrated, power grid frequency modulation capacity requirement
It dramatically increases.And the turbine-generator units as one of the main variable frequency power source of power grid, the effect of the anti-tune due to caused by water hammer make machine
The problems such as group response time increases, slower there are frequency modulation movement.Therefore, it is necessary to expand China's frequency modulation resource, abundant primary tune
Frequency technological means.
Water pump is the medium-and-large-sized industrial user of electric system, is widely used in power plant, water treatment plant, agricultural irrigation etc., especially
The energy-conserving action of its velocity fluctuation pump increases its dosage year by year.The input power of water pump and the cube of revolving speed are directly proportional, if adjusting
The revolving speed of water-saving pump then can quickly adjust its input power, to adjust network re-active power balance from load side, be equivalent to and hold
The primary frequency function for carrying on a shoulder pole power grid, can expand frequency modulation resource significantly.
Velocity fluctuation pump can quickly change revolving speed by frequency converter, achieve the purpose that quickly to adjust input power, response
Speed faster, even up to arrives ms grades compared with turbine-generator units.Therefore, it responds and participates in from load side using velocity fluctuation pump
Primary frequency regulation of power network is a kind of effective method, but current velocity fluctuation pump and control method only plays energy-efficient purposes,
It cannot participate in power grid frequency modulation.
Summary of the invention
The object of the present invention is to provide a kind of methods for participating in primary frequency regulation of power network using velocity fluctuation pump, solve extensive
The problem of photovoltaic, wind-power electricity generation concentrate access power grid, and primary frequency modulation scarcity of resources, grid stability is caused to reduce.
The technical scheme adopted by the invention is that a method of primary frequency regulation of power network is participated in using velocity fluctuation pump, is used
A kind of velocity fluctuation pump frequency modulation system progress primary frequency regulation of power network, velocity fluctuation pump frequency modulation system includes velocity fluctuation pump and primary frequency modulation control
System processed, velocity fluctuation pump connect primary frequency modulation control system, and velocity fluctuation pump includes water pump, motor and frequency converter, primary frequency modulation
Control system includes sequentially connected rotation speed measuring module, frequency control module and frequency measuring block, rotation speed measuring module and
Real-time pump rotary speed and real-time grid frequency information are passed to frequency control module respectively by frequency measuring block, and frequency controls mould
The output end of block is connected to frequency converter, and frequency control module includes frequency dead band link, frequency regulator and revolving speed limiting element；
When mains frequency deviation is more than the frequency dead band of setting, according to mains frequency deviation information, frequency regulator hair
Control command out, i.e., corresponding revolving speed adjustment amount are used as after revolving speed limiting element clipping and turn in conjunction with real-time pump rotary speed
Fast given value is output to frequency converter, controls motor speed to control the input power of velocity fluctuation pump and realizes mains frequency
It adjusts.
Other features of the invention also reside in,
Specific operation process includes the following steps:
Step 1, power grid given frequency f is setnFor 50Hz, real-time grid frequency f and fnCompare, calculates mains frequency deviation
Δ f=| f-fn|；
Step 2, frequency control parameters are set, including primary frequency modulation allows frequency operating dead zone and rotational speed regulation or more
Limit；
Step 3, the exemplary frequency deviation values Δ f that step 1 obtains is by frequency dead band link, when mains frequency deviation delta f is more than
When the frequency dead band that step 2 is arranged, frequency regulator exports corresponding revolving speed adjustment amount Δ ω；When exemplary frequency deviation values Δ f is permitting
Perhaps within the scope of frequency operating dead zone, water pump only draws water as conventional water pump, is not involved in primary frequency regulation of power network；
Step 4, revolving speed adjustment amount Δ ω is combined with real-time pump rotary speed ω, is ω ± Δ ω, is limited by revolving speed
Rotary speed setting value ω is used as after link clippingrIt is output to frequency converter, the revolving speed of water pump is adjusted by frequency converter, water pump is adjusted with this
Input power, to realize adjusting to mains frequency.
Frequency dead band is determined according to the operating condition of primary frequency regulation of power network demand and velocity fluctuation pump in step 2；Revolving speed
The changes in flow rate range that adjusting bound then allows according to pumping plant determines.
The invention has the advantages that a kind of method for participating in primary frequency regulation of power network using velocity fluctuation pump, by once adjusting
The design of frequency control system solves large-scale photovoltaic, wind-power electricity generation concentrates access power grid, leads to primary frequency modulation scarcity of resources, electricity
The problem of net stability reduces.It has the advantage that compared with the prior art
(1) velocity fluctuation pump, which participates in primary frequency regulation of power network, can expand power grid frequency modulation resource, enrich primary frequency modulation means, while its
Revolving speed can continuously adjust, and can meet the requirement of input power variation at any time, be capable of 24 hours responsive electricity grid primary frequency modulations
Demand.
(2) since water pump input power is directly proportional to the cube of revolving speed, velocity fluctuation pump may be implemented by rotational speed regulation
Power quickly adjusts, and can preferably balance the random fluctuation of wind-powered electricity generation, photovoltaic etc., improves grid stability.
(3) primary frequency modulation is participated in from network load side, allows the production for increasing new energy without adding special tune
Frequency power station reduces electric system cost of investment.
(4) under the premise of not influencing pumping plant normal operation, by providing paid ancillary service for power grid, pumping plant can be given
Bring considerable economic benefit.
Detailed description of the invention
Fig. 1 is a kind of velocity fluctuation pump frequency modulation system of method that primary frequency regulation of power network is participated in using velocity fluctuation pump of the invention
Structural schematic diagram；
Fig. 2 is a kind of knot that frequency control module in the method for primary frequency regulation of power network is participated in using velocity fluctuation pump of the invention
Structure schematic diagram.
Specific embodiment
The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
A kind of method participating in primary frequency regulation of power network using velocity fluctuation pump of the invention, using a kind of velocity fluctuation pump frequency modulation system
System carries out primary frequency regulation of power network, as shown in Figure 1, velocity fluctuation pump frequency modulation system includes velocity fluctuation pump and primary frequency modulation control system,
Velocity fluctuation pump connects primary frequency modulation control system, and velocity fluctuation pump includes water pump, motor and frequency converter, primary frequency modulation control system
Including sequentially connected rotation speed measuring module, frequency control module and frequency measuring block, rotation speed measuring module and frequency measurement
Real-time pump rotary speed and real-time grid frequency information are passed to frequency control module, the output of frequency control module respectively by module
End is connected to frequency converter, and frequency control module includes frequency dead band link, frequency regulator and revolving speed limiting element；
As shown in Fig. 2, the preset control strategy in frequency regulator, when mains frequency deviation is more than the frequency dead band of setting
When, according to mains frequency deviation information, frequency regulator issues control command, i.e., corresponding revolving speed adjustment amount, with real-time water pump
Revolving speed combines, and is output to frequency converter as rotary speed setting value after revolving speed limiting element clipping, controls motor speed, thus
The input power for controlling water pump, realizes the adjusting of mains frequency.
A kind of method participating in primary frequency regulation of power network using velocity fluctuation pump of the invention, specific operation process include following step
It is rapid:
Step 1, power grid given frequency f is setnFor 50Hz, real-time grid frequency f and fnCompare, calculates mains frequency deviation
Δ f=| f-fn|；
Step 2, frequency control parameters are set, including primary frequency modulation allows frequency operating dead zone and rotational speed regulation or more
Limit；
Frequency dead band is determined according to the operating condition of primary frequency regulation of power network demand and velocity fluctuation pump in step 2；Revolving speed
The changes in flow rate range that adjusting bound then allows according to pumping plant determines；
Step 3, the exemplary frequency deviation values Δ f that step 1 obtains is by frequency dead band link, when mains frequency deviation delta f is more than
When the frequency dead band that step 2 is arranged, frequency regulator exports corresponding revolving speed adjustment amount Δ ω according to preset control strategy；When frequency
Rate deviation Δ f is allowing within the scope of frequency operating dead zone, and water pump only draws water as conventional water pump, is not involved in power grid and once adjusts
Frequently；
Step 4, revolving speed adjustment amount Δ ω is combined with real-time pump rotary speed ω, is ω ± Δ ω, is limited by revolving speed
Rotary speed setting value ω is used as after link clippingrIt is output to frequency converter, the revolving speed of water pump is adjusted by frequency converter, water pump is adjusted with this
Input power, to realize adjusting to mains frequency.
When mains frequency is greater than 50Hz, illustrate network re-active power surplus, needing to increase network load makes active power
Balance, primary frequency modulation control system increases it by input power by the revolving speed that above four steps increase velocity fluctuation pump at this time,
To make mains frequency decline.
On the contrary, illustrating network re-active power deficiency, it is desirable to reduce network load makes active when mains frequency is less than 50Hz
Power-balance, primary frequency modulation control system makes it reduce input work by the revolving speed that above four steps reduce velocity fluctuation pump at this time
Rate, so that mains frequency be made to rise.
A kind of method participating in primary frequency regulation of power network using velocity fluctuation pump of the invention, solves large-scale photovoltaic, wind-force
The problem of access power grid is concentrated in power generation, and primary frequency modulation scarcity of resources, grid stability is caused to reduce；The present invention uses velocity fluctuation pump
Quickly change revolving speed by frequency converter, simultaneously because input power is directly proportional to the cube of revolving speed, can achieve quick adjusting
Input power participates in the purpose of primary frequency regulation of power network, and response speed faster, even up to arrives ms compared with turbine-generator units
Grade.Therefore, using velocity fluctuation pump loads a large amount of in power grid, high quality frequency modulation ancillary service is provided from load side for power grid, is to mention
High grid stability, the effective ways for enhancing power grid frequency modulation ability.Power grid frequency modulation resource can not only be expanded, primary frequency modulation hand is enriched
Section improves safe stability of power system, while can give full play to existing resource, reduces electric system cost of investment, moreover it is possible to logical
It crosses frequency modulation ancillary service and brings considerable economic benefit to pumping plant.
Claims (3)
1. a kind of method for participating in primary frequency regulation of power network using velocity fluctuation pump, which is characterized in that use a kind of velocity fluctuation pump frequency modulation
System carries out primary frequency regulation of power network, and the velocity fluctuation pump frequency modulation system includes velocity fluctuation pump and primary frequency modulation control system, described
Velocity fluctuation pump connects the primary frequency modulation control system, and the velocity fluctuation pump includes water pump, motor and frequency converter, described primary
Frequency-modulation control system includes sequentially connected rotation speed measuring module, frequency control module and frequency measuring block, and the revolving speed is surveyed
The frequency information of the revolving speed of real-time water pump and real-time grid is passed to the frequency respectively by amount module and the frequency measuring block
The output end of rate control module, the frequency control module connects the frequency converter, and the frequency control module includes that frequency is dead
Area's link, frequency regulator and revolving speed limiting element；
When mains frequency deviation is more than the frequency dead band of setting, according to mains frequency deviation information, the frequency regulator hair
Control command out, i.e., corresponding revolving speed adjustment amount, in conjunction with the real-time pump rotary speed, by the revolving speed limiting element clipping
It is output to the frequency converter as rotary speed setting value afterwards, the motor speed is controlled, to control the input work of velocity fluctuation pump
Rate realizes the adjusting of mains frequency.
2. a kind of method for participating in primary frequency regulation of power network using velocity fluctuation pump as described in claim 1, which is characterized in that specific
Operating process includes the following steps:
Step 1, power grid given frequency f is setnFor 50Hz, real-time grid frequency f and fnCompare, calculates mains frequency deviation delta f=
|f-fn|；
Step 2, the frequency control parameters are set, including primary frequency modulation allows frequency operating dead zone and rotational speed regulation or more
Limit；
Step 3, the exemplary frequency deviation values Δ f that step 1 obtains passes through the frequency dead band link, when mains frequency deviation delta f is more than
When the frequency dead band that step 2 is arranged, the frequency regulator exports corresponding revolving speed adjustment amount Δ ω；As exemplary frequency deviation values Δ f
Allowing within the scope of frequency operating dead zone, water pump only draws water as conventional water pump, is not involved in primary frequency regulation of power network；
Step 4, revolving speed adjustment amount Δ ω is combined with real-time pump rotary speed ω, is ω ± Δ ω, is limited by the revolving speed
Rotary speed setting value ω is used as after link clippingrIt is output to the frequency converter, adjusts the revolving speed of water pump, by the frequency converter with this
The input power of water pump is adjusted, to realize the adjusting to mains frequency.
3. a kind of method for participating in primary frequency regulation of power network using velocity fluctuation pump as claimed in claim 2, which is characterized in that described
Frequency dead band is determined according to the operating condition of primary frequency regulation of power network demand and variable-ratio water pump in step 2；In rotational speed regulation
The changes in flow rate range that lower limit then allows according to pumping plant determines.
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| CN201910250723.XA CN110011331A (en) | 2019-03-29 | 2019-03-29 | A method of primary frequency regulation of power network is participated in using velocity fluctuation pump |
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| CN201910250723.XA CN110011331A (en) | 2019-03-29 | 2019-03-29 | A method of primary frequency regulation of power network is participated in using velocity fluctuation pump |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110401212A (en) * | 2019-08-09 | 2019-11-01 | 华北水利水电大学 | A kind of wind and solar hybrid generating system based on pump-storage generator |
| CN111541281A (en) * | 2020-05-13 | 2020-08-14 | 中国电力工程顾问集团华东电力设计院有限公司 | Auxiliary frequency modulation method and device for optimal wheel cycle efficiency point of power generation system |
| CN112202384A (en) * | 2020-08-25 | 2021-01-08 | 海南广源隆节能环保股份有限公司 | Automatic control safety protection method and device for photoelectric water control system |
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| CN102629762A (en) * | 2012-04-24 | 2012-08-08 | 湖北省电力公司电力试验研究院 | Floating frequency difference regulation and variable rate load instruction modification-based primary frequency regulation method |
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2019
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110401212A (en) * | 2019-08-09 | 2019-11-01 | 华北水利水电大学 | A kind of wind and solar hybrid generating system based on pump-storage generator |
| CN111541281A (en) * | 2020-05-13 | 2020-08-14 | 中国电力工程顾问集团华东电力设计院有限公司 | Auxiliary frequency modulation method and device for optimal wheel cycle efficiency point of power generation system |
| CN112202384A (en) * | 2020-08-25 | 2021-01-08 | 海南广源隆节能环保股份有限公司 | Automatic control safety protection method and device for photoelectric water control system |
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