CN106452016B - The more PID target autocontrol methods of frequency converter - Google Patents
The more PID target autocontrol methods of frequency converter Download PDFInfo
- Publication number
- CN106452016B CN106452016B CN201610940821.2A CN201610940821A CN106452016B CN 106452016 B CN106452016 B CN 106452016B CN 201610940821 A CN201610940821 A CN 201610940821A CN 106452016 B CN106452016 B CN 106452016B
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- Prior art keywords
- pid
- frequency converter
- target
- operating status
- specified rate
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0012—Control circuits using digital or numerical techniques
Abstract
The present invention relates to converter technology fields, disclose a kind of more PID target autocontrol methods of frequency converter, including step：S1：Setting frequency converter frequency is given by PID；S2：N PID target specified rate, imparting and the one-to-one n physical quantity target point meaning of n PID target specified rate of setting, and setting a switch conditions for being converted between n PID target specified rate of 2 (n 1), n >=2, each physical quantity target point corresponds to the operating status of a PID target specified rate of frequency converter, and two switch conditions in different switching direction are equipped between the adjacent operating status of each two；S3：Frequency converter operates in PIDi‑1And PIDiIt is converted between corresponding operating status.The present invention can meet different physical quantity target point according to actual demand variation within a certain period of time and export, and automate, precision degree it is higher.
Description
Technical field
The present invention relates to Frequency Converter Control technical field, more particularly to a kind of more PID target autocontrol methods of frequency converter.
Background technology
Frequency Conversion and Speed Regulation Technique is being currently to be widely used general advanced intelligent control technology；It is negative as control fluid
The pump class of load and the control application variable-frequency governor of Fan Devices are with regard to very convenient efficient, due to physics of fluid load itself
Property feature, the constant pressure of existing pressure and temp control aspect, thermostatic control generally use PID target to control（Set one
PID adjusts desired value, and when feedback signal value is less than desired value, frequency converter sends out motor speed-up command, to be rapidly achieved target
Value, when feedback signal value be higher than desired value when frequency converter send out motor deceleration order, with reduce output reach desired value, make be
System output is always held at desired value, ensures a stable output）, at present frequency convertor PID desired value generally have following configuration
Using：
1, one PID target value single application of a PID programming system applies simple target in a system, cannot
Real demand when meeting this system different time, different conditions, different demands and target, hommization, diversification reflection are poor；
2, two independent PID programming systems are respectively corresponding there are one desired value, two systems independent utility, according to specifically wanting
It asks periphery to apply the specific a set of PID functions of order operation, the different concrete condition of system can be met and apply different PID functions
It realizes, but accuracy is poor, low by peripheral order the degree of automation；
3, a PID programming system multiple PID target values timing is applied, and artificially mechanically system requirements are timed point
Match, probably meets the primary demand in the period, but the actual demand variation in the period cannot effectively meet, impersonality,
Automation, precision.
Invention content
The present invention proposes a kind of more PID target autocontrol methods of frequency converter, solves more PID targets of the prior art certainly
The problem of automation of dynamic control, precision degree are low, and actual demand variation cannot effectively meet within a certain period of time.
A kind of more PID target autocontrol methods of frequency converter of the present invention, including step：
S1：Setting frequency converter frequency is given by PID；
S2：N PID target specified rate of setting assigns the one-to-one n physical quantity target of n PID target specified rate
Point meaning and a switch conditions for being converted between n PID target specified rate of 2 (n-1), n >=2, each physical quantity mesh
Punctuate corresponds to the operating status of a PID target specified rate of frequency converter, and corresponding different between the adjacent operating status of each two
Two switch conditions of conversion direction；
S3：Frequency converter operates in PIDi-1Corresponding operating status, and reach PIDi-1To PIDiSwitch condition when, then become
Frequency device operational objective is automatically from PIDi-1Operating status jump to PIDiOperating status；Frequency converter operates in PIDiCorresponding fortune
Row state, and reach PIDiTo PIDi-1Switch condition when, then frequency converter operational objective is automatically from PIDiOperating status redirect
To PIDi-1Operating status, the PIDiIndicate i-th of PID target specified rate.
Wherein, between the adjacent operating status of each two corresponding different switching direction the corresponding numerical value of two switch conditions
It is identical, in the step S3, if reach switch condition, and the time for persistently making a reservation for delay just executes between PID target specified rate
Redirect.
Wherein, between the adjacent operating status of each two corresponding different switching direction the corresponding numerical value of two switch conditions
It differs, switch condition includes：Reach, be higher or lower than preset frequency, electric current, voltage, power or time.
The present invention is redirected by different switching condition between multiple PID target specified rates automatically, to reach different PID targets
The corresponding different physical quantities target point of specified rate can meet different physics according to actual demand variation within a certain period of time
Measure target point output, and automate, precision degree it is higher.
Specific implementation mode
The following is a clear and complete description of the technical scheme in the embodiments of the invention, it is clear that described embodiment
Only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
The every other embodiment that art personnel are obtained without creative efforts belongs to the model that the present invention protects
It encloses.
The more PID target autocontrol methods of frequency converter of the present embodiment include：
Step S1, setting frequency converter frequency are given by PID.
Step S2, n PID target specified rate, imparting and the one-to-one n physics of n PID target specified rate of setting
Measure target point meaning and a switch conditions for being converted between n PID target specified rate of 2 (n-1), n >=2, each object
Reason amount target point corresponds to the operating status of a PID target specified rate of frequency converter, and right between the adjacent operating status of each two
Answer two switch conditions in different switching direction.Such as：It is 75 that PID target specified rate, which is arranged, needs to assign 75 specific physics
Target meaning, is 75 degree of temperature or 75bar pressure, can also be according to the kind of frequency converter external meters with the determination of frequency converter inside
Class determines.
Step S3, frequency converter operate in PIDi-1Corresponding operating status, and reach PIDi-1To PIDiSwitch condition when,
Then frequency converter operational objective is automatically from PIDi-1Operating status jump to PIDiOperating status；Frequency converter operates in PIDiIt is corresponding
Operating status, and reach PIDiTo PIDi-1Switch condition when, then frequency converter operational objective is automatically from PIDiOperating status
Jump to PIDi-1Operating status.
The present invention is redirected by switch condition between multiple PID automatically, to reach the corresponding different physical quantities mesh of different PID
Punctuate can meet different physical quantity target points according to actual demand variation within a certain period of time and export, and automate, essence
Quasi-ization degree is higher.
In the present embodiment, two switch conditions in corresponding different switching direction correspond between the adjacent operating status of each two
Numerical value it is identical, in step S3, if reach switch condition, and persistently make a reservation for delay（Such as：5 seconds）Time just execute PID target
Redirecting between specified rate.It is arranged and is delayed the output for avoiding frequency converter when switch condition or so is beated back and forth, generates table tennis
Effect.
The corresponding numerical value of two switch conditions in corresponding different switching direction may be used also between the adjacent operating status of each two
To differ.Switch condition can be reached, be higher than, being less than frequency, electric current, voltage, power or time.
Below by example（By taking n=2 as an example）The present invention is described in detail：
Hydroelectric machine is sent in Frequency Converter Control waterworks, needs to meet basic hydraulic demand, i.e. hydraulic pressure reaches 95 meters of high pressures
Power, water supply are more than standard water consumption, and meeting the comfortable hydraulic demand of user is：Hydraulic pressure reaches 100 meters of high pressures, and water consumption is mark
Two physical quantity target points are arranged in mutatis mutandis water：
1, hydraulic pressure reaches 100 meters of high pressure physical quantity target points and corresponds to PID1Target specified rate is 100；
2, hydraulic pressure reaches 95 meters of high pressure physical quantity target points and corresponds to PID2Target specified rate is 95.
If two switch conditions in corresponding different switching direction differ between the adjacent operating status of each two, such as：
PID1→PID2Switch condition is arranged to arrive at upper frequency limit, such as 50Hz, PID2→PID1Switch condition is arranged to arrive under frequency
Limit, such as 45Hz.
After booting, frequency converter is with PID1Water comfort level, maximum are most preferably used in the state operation that target gives, 100 meters of guarantee
Guarantee standard water supply, but with water increase or peak period water, such as：18:00~20:Between 00, water consumption increases, if also to protect
The hydraulic pressure of 100 meters of high pressures is held, the load of frequency converter can increase, and output frequency reaches at or above the upper limit if detecting at this time
50Hz, then it is assumed that frequency converter load is heavier, is automatically shifted to PID at this time2State operation, ensure 95 meters of basic pressures water
Pressure ensures to provide the water supply more than standard water supply again with water hydraulic pressure substantially；As water consumption decline, PID2Ensure 95 meters substantially
Frequency converter frequency declines in the case of hydraulic pressure, reach or less than running frequency lower limit 45Hz delay after, be automatically converted to target to
Determine PID1Operation ensures 100 meters of easypro suitable water hydraulic pressure.
If corresponding to the corresponding numerical value of two switch conditions in different switching direction between the adjacent operating status of each two is arranged
Identical, for the switch condition, default one is delayed, such as：5 seconds.When the value for meeting or exceeding switch condition setting in one direction is held
When 5 seconds continuous, then the conversion between PID is realized.Such as：In above-mentioned example, it is 48Hz that frequency, which is arranged, in switch condition, if frequency converter is negative
Lotus reaches 5 seconds or more more than 48Hz during exacerbation, then realizes PID1→PID2Conversion, if frequency converter load is in mitigation
In the process, reach 5 seconds or more less than 48Hz, then realize PID2→PID1Conversion.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (3)
1. a kind of more PID target autocontrol methods of frequency converter, which is characterized in that including step：
S1：Setting frequency converter frequency is given by PID；
S2：N PID target specified rate, imparting and the one-to-one n physical quantity target point of n PID target specified rate of setting
Meaning, and setting a switch conditions for being converted between n PID target specified rate of 2 (n-1), n >=2, each physical quantity
Target point corresponds to the operating status of a PID target specified rate of frequency converter, and is equipped with not between the adjacent operating status of each two
With two switch conditions of conversion direction；
S3：Frequency converter operates in PIDi-1Corresponding operating status, and reach PIDi-1To PIDiSwitch condition when, then frequency converter
Operational objective is automatically from PIDi-1Operating status jump to PIDiOperating status；Frequency converter operates in PIDiCorresponding operation shape
State, and reach PIDiTo PIDi-1Switch condition when, then frequency converter operational objective is automatically from PIDiOperating status jump to
PIDi-1Operating status, the PIDiIndicate that i-th of PID target specified rate, i take the integer of 1~n.
2. the more PID target autocontrol methods of frequency converter as described in claim 1, which is characterized in that the adjacent operation of each two
The corresponding numerical value of two switch conditions in corresponding different switching direction is identical between state, in the step S3, turns if reaching
The time changed condition, and persistently make a reservation for delay just executes redirecting between PID target specified rate.
3. the more PID target autocontrol methods of frequency converter as described in claim 1, which is characterized in that the adjacent operation of each two
The corresponding numerical value of two switch conditions in corresponding different switching direction differs between state, and switch condition includes：Reach, is high
In or less than preset frequency, electric current, voltage, power or time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610940821.2A CN106452016B (en) | 2016-11-01 | 2016-11-01 | The more PID target autocontrol methods of frequency converter |
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| CN201610940821.2A CN106452016B (en) | 2016-11-01 | 2016-11-01 | The more PID target autocontrol methods of frequency converter |
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| CN106452016A CN106452016A (en) | 2017-02-22 |
| CN106452016B true CN106452016B (en) | 2018-10-09 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426462A (en) * | 2011-11-30 | 2012-04-25 | 东北大学 | Method for accelerating stabilizing speed of ultra-fast cold variable frequency pump water pressure system |
| CN102929305A (en) * | 2012-10-29 | 2013-02-13 | 北京金自能源科技发展有限公司 | Variable-frequency speed adjustment technique-based Bang-Bang+PID (Piping and Instrument Diagram) constant pressure water supply closed-loop control method |
| CN103529695A (en) * | 2013-10-08 | 2014-01-22 | 郭景礼 | Variable-frequency speed regulation water supply system based on day parting intelligent PID (proportion integration differentiation) regulator |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7142140B2 (en) * | 2004-07-27 | 2006-11-28 | Silicon Laboratories Inc. | Auto scanning ADC for DPWM |
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- 2016-11-01 CN CN201610940821.2A patent/CN106452016B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426462A (en) * | 2011-11-30 | 2012-04-25 | 东北大学 | Method for accelerating stabilizing speed of ultra-fast cold variable frequency pump water pressure system |
| CN102929305A (en) * | 2012-10-29 | 2013-02-13 | 北京金自能源科技发展有限公司 | Variable-frequency speed adjustment technique-based Bang-Bang+PID (Piping and Instrument Diagram) constant pressure water supply closed-loop control method |
| CN103529695A (en) * | 2013-10-08 | 2014-01-22 | 郭景礼 | Variable-frequency speed regulation water supply system based on day parting intelligent PID (proportion integration differentiation) regulator |
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