CN100438256C - Power-less compensation control method - Google Patents
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- CN100438256C CN100438256C CNB2006101179762A CN200610117976A CN100438256C CN 100438256 C CN100438256 C CN 100438256C CN B2006101179762 A CNB2006101179762 A CN B2006101179762A CN 200610117976 A CN200610117976 A CN 200610117976A CN 100438256 C CN100438256 C CN 100438256C
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- 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
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- Y02E40/30—Reactive power compensation
Abstract
The control method uses voltage as first controlled variable, current as second controlled variable, power factor as third controlled variable, reactive current as fourth controlled variable, number of loop as fifth controlled variable. Comparing voltage, current, power factor, reactive current, and number of loop with their threshold values setup in advance, the method carries out voltage control, current control, power factor control, reactive current control, and number of loop control in sequence. Whole procedure is a large circulation. Based on ever changing parameter such as voltage, current, power factor, reactive current, and number of loop of product, the method does corresponding handling to implement synthetical and stable control.
Description
Technical field
The present invention relates to a kind of power-less compensation control method, specifically, be based on the multi-parameter comprehensive control method of reactive power compensation.
Background technology
Reactive-load compensator be a kind ofly can reduce line loss, saves energy, stablize line voltage, improve the electrical network three-phase imbalance, for the equipment of transformer increase-volume, be widely used in the electric power system.
Traditional has the following disadvantages based on monolithic processor controlled reactive-load compensator:
According to the difference of control physical quantity, reactive-load compensator can be divided into power factor controlling type, reactive current control type, Reactive Power Control type, and their master control physical quantity is comparatively single, and misoperation takes place when determining compensation rate easily, can not compensate accurately and reliably.
For power factor type reactive-load compensator, its master control physical quantity is a power factor.During work with the throwing of current power factor and setting, cut thresholding and compare, with determine to drop into, excision still is to remain unchanged.According to compensation principle, after dropping into one group of electric capacity (implementing) by connecting output circuit, because load is lighter, can make power factor leading, power factor one is leading, will excise one group of electric capacity (implementing by the disjunction output circuit) immediately, and excision back power factor is not enough, can drop into one group of electric capacity again, therefore, above-mentioned power factor type reactive-load compensator has the defective that easily forms throw in-of oscillation when underload.
For reactive power type reactive-load compensator, its master control physical quantity is a reactive power.Calculate current reactive power during work earlier, if reactive power is greater than the offset of next step capacitor group, then drop into a capacitor group (implementing),, then excise a capacitor group (implementing) by the disjunction output circuit if currency is leading by connecting output circuit.Mainly there is following defective in this control method when using: the performance number of capacitor group is a nominal value, in use be proportional to operating voltage, when voltage ripple of power network is big, the nominal value of capacitor group and actual value difference are bigger, be used as the switching Rule of judgment of reactive-load compensator with this, then action error is bigger, misoperation easily.
For reactive current type reactive-load compensator, its master control physical quantity is a reactive current.Its compensation principle and reactive power type reactive-load compensator are similar, calculate current reactive current during work earlier, if reactive current is greater than the offset of next step capacitor group, then drop into a capacitor group (implementing) by connecting output circuit, if currency is leading, then excise a capacitor group (implementing) by the disjunction output circuit.Mainly there is following defective in this control method when using: the current value of capacitor group is a nominal value, in use be proportional to operating voltage, when voltage ripple of power network is big, the nominal value of capacitor group and actual value difference are bigger, be used as the switching Rule of judgment of reactive-load compensator with this, then action error is bigger, misoperation easily.
Summary of the invention
The technical problem to be solved in the present invention is, a kind of power-less compensation control method is provided, and can overcome the shortcoming that above-mentioned single master control physical quantity control produces, and realizes reliable and stable compensation.
In order to achieve the above object, technical scheme of the present invention is as follows:
A kind of power-less compensation control method comprises the steps: 1) magnitude of voltage and the voltage setting value of current electrical network compared, if this magnitude of voltage is greater than the overvoltage set point or less than the under voltage set point, then redirect execution in step 6; Otherwise 2) current value and the current setting value with current electrical network compares, if this electric current is less than current setting value, and then redirect execution in step 6; Otherwise 3) power factor and the thresholding set point with current electrical network compares, if this power factor is more than or equal to excision thresholding set point, then redirect execution in step 6; If this power factor is then returned step 1 less than excision thresholding set point and greater than dropping into the thresholding set point; Otherwise 4) reactive current value and the reactive current set point with current electrical network compares, if the reactive current value smaller or equal to the reactive current set point, is then returned step 1; Otherwise 5) calculate the access failure output circuit and count M; If M is not equal to 0, then connect No. one output circuit (expression drops into one group of electric capacity), return step 1 then; If M equals 0, then directly return step 1; 6) calculate the on output circuit and count L; If L is not equal to 0, then disjunction No. one output circuit (one group of electric capacity of expression excision) returns step 1 then; If L equals 0, then directly return step 1.
Adopting above-mentioned control method, is first controlled quentity controlled variable with voltage, has guaranteed the normal working voltage of reactive-load compensator, has exempted the work that loads under overvoltage, the under voltage situation; Because when working under overvoltage and under-voltage state, bigger to the harm of reactive-load compensator and auxiliary products thereof, especially under over-voltage condition, the generating device phenomenon of burning easily is so be first controlled quentity controlled variable with voltage.With electric current is second controlled quentity controlled variable, as constraints, can exempt reactive-load compensator work under the underload situation, thereby avoid the situation of reactive-load compensator throw in-of oscillation under the underload situation, simultaneously from the compensation policy angle, the necessity that under the situation of underloading, does not also compensate.With power factor is the 3rd controlled quentity controlled variable, and as the major control physical quantity, control strategy is straightforward, compensates with clearly defined objective.With reactive current is the 4th controlled quentity controlled variable, as auxiliary major control physical quantity, the throw in-of oscillation phenomenon that exists in the time of can avoiding having only power factor controlling is (when dropping into a certain group of load, estimate earlier to drop into and judge, in the time of after judging input, can surpassing power factor excision thresholding, do not take to connect the action of output circuit, to eliminate the throw in-of oscillation phenomenon).With the output circuit number is the 5th controlled quentity controlled variable, as the constraints of reactive-load compensator output action, when judging can not output action the time, does not send output order.The return voltage sampling of above-mentioned many places, calculation process place, i.e. expression restarts to carry out voltage control, order is carried out Current Control, power factor controlling, reactive current control, output circuit numerical control system then, whole process is a systemic circulation, can make corresponding processing at the parameter situation (voltage, electric current, power factor, reactive current, output circuit number) that product constantly changes, realize Comprehensive Control, stable control.
Description of drawings
Fig. 1 is the basic principle block diagram of power-less compensation control method of the present invention;
Fig. 2 is the theory diagram of voltage parameter control among Fig. 1;
Fig. 3 is the theory diagram of current parameters control among Fig. 1;
Fig. 4 is the principle block diagram of power factor controlling among Fig. 1;
Fig. 5 is a reactive current parameter control principle block diagram among Fig. 1;
Fig. 6 is an output circuit numerical control system principle block diagram among Fig. 1;
Fig. 7 is the reactive-load compensator overall structure schematic diagram of the method according to this invention design;
Fig. 8 is a reactive-load compensator master control program process blocks schematic diagram of the present invention;
Fig. 9 reactive-load compensator output program of the present invention process blocks schematic diagram.
Embodiment
According to Fig. 1 to Fig. 9, provide preferred embodiment of the present invention, and described in detail below, enable to understand better function of the present invention, characteristics.
The multi-parameter comprehensive control method of reactive power compensation of the present invention adopts following Control Parameter: voltage, electric current, power factor, reactive current, output output circuit number.Wherein, be first controlled quentity controlled variable with voltage, electric current is second controlled quentity controlled variable, and power factor is the 3rd controlled quentity controlled variable, and reactive current is the 4th controlled quentity controlled variable, and the output circuit number is the 5th controlled quentity controlled variable.
Described multi parameters control principle is as follows:
The operating state of reactive-load compensator can be divided in advance (power factor surpasses the excision thresholding), lag behind (power factor is not more than and drops into thresholding), stable (power factor drops between thresholding and the excision thresholding) three kinds of states.
Under hysteretic state, then need following parameter to satisfy if will take to drop into action (promptly connecting output circuit): voltage (greater than under-voltage value smaller or equal to overpressure value) in claimed range, electric current must reach certain numerical value (more than or equal to the undercurrent value), reactive current must reach certain value (greater than the reactive current thresholding), and access failure output circuit number is non-vanishing; These parameters all satisfy then can be taked to drop into action, does not then take to drop into action if do not satisfy.
Under leading state, if will take excision action (being the disjunction output circuit) then to need following parameter to satisfy: on output circuit number is non-vanishing, then can take the excision action if satisfy.Simultaneously, if voltage overruns or electric current less than certain numerical value, and on output circuit number is non-vanishing, equally also can cause the excision action.
Under stable state, if voltage overruns, electric current is less than certain numerical value, if these two conditions have arbitrary satisfy and on output circuit number non-vanishing, then can take excision action, if two conditions do not satisfy or on output circuit number is zero and does not take the excision action.
As shown in Figure 1, during reactive-load compensator work, at first carry out voltage (first controlled quentity controlled variable) control and treatment, carry out electric current (second controlled quentity controlled variable) control and treatment then, and then carry out power factor (the 3rd controlled quentity controlled variable) control and treatment, and then carry out reactive current (the 4th controlled quentity controlled variable) control and treatment, carry out output circuit number (the 5th controlled quentity controlled variable) control and treatment at last, final control output.
When carrying out voltage control, as shown in Figure 2, comprise the steps: to carry out voltage sample, sampled result is calculated, draw current line voltage value, and and given upper voltage limit, lower voltage limit compare, voltage is if be higher than upper voltage limit or be lower than lower voltage limit, then changes A2 flow process (output circuit numerical control system is so that judged whether that the on output circuit can disjunction) over to, otherwise change A1 flow process (Current Control judges that electric current is whether in scope) over to.
Voltage-controlled effect is a normal working voltage of having guaranteed reactive-load compensator, has avoided reactive-load compensator to load on the phenomenon of easily burning under the over-voltage condition.When voltage does not satisfy condition, then change the output circuit number over to and judge, seeing if there is the on output circuit can disjunction; When voltage satisfied condition, order changed Current Control over to and further judges.
When carrying out Current Control, as shown in Figure 3, comprise the steps: to carry out current sample, sampled result is calculated, drawn current power network current value, and compare with given lower current limit, current value is if be lower than lower current limit, then change B2 (output circuit numerical control system is so that judged whether that the on output circuit can disjunction) flow process over to, otherwise order changes B1 flow process (power factor controlling) over to.
The effect of Current Control is to guarantee that the reactive-load compensator compensation time will have certain load, can avoid under underloading situation power factor type reactive-load compensator that the situation of throw in-of oscillation takes place easily mostly.When electric current does not satisfy condition, then change the output circuit number over to and judge, seeing if there is on output circuit number can disjunction; When electric current satisfied condition, order changed power factor controlling over to and further judges.
When carrying out power factor controlling, as shown in Figure 4, comprise the steps: to carry out the power factor sampling, sampled result is calculated, draw current power factor of electric network value, and and given input thresholding, excision thresholding compare, power factor value is if smaller or equal to dropping into thresholding, then change C1 flow process (reactive current control) over to, and if power factor value is more than or equal to the excision thresholding, then change C2 flow process (output circuit numerical control system) over to, otherwise change C3 flow process (being back to voltage control) over to.
The effect of power factor controlling is to judge whether to satisfy throwing, tangent condition, and control strategy is straightforward, compensates with clearly defined objective.If power factor satisfies the excision condition, then change the output circuit number over to and judge, seeing if there is on output circuit number can disjunction; If power factor satisfies the input condition, then change reactive current control over to and further judge.
When carrying out reactive current control, as shown in Figure 5, comprising the steps: to carry out reactive current calculates, draw current reactive current value, and and given reactive current thresholding (will threshold value be compensated) according to the difference of current voltage and nominal voltage compare, if the reactive current value then changes D2 flow process (being back to voltage control) over to, otherwise changes D1 flow process (output circuit numerical control system) over to smaller or equal to the reactive current thresholding.
The effect of reactive current control is: when power factor satisfies the input condition, when next step capacitor group input is carried out in preparation, whether can make power factor of electric network leading after only judging this group capacitor group input, if it can be leading, then do not take to drop into action, if can not be leading, then change output circuit numerical control system over to and further differentiate.Can eliminate the phenomenon of throw in-of oscillation like this.
Simultaneously, because the reactive current thresholding has been carried out compensation deals (voltage compensation, promptly be to convert the electric capacity nominal value under the nominal voltage under the virtual voltage actual value), so can eliminate, avoid misoperation because voltage fluctuation brings bigger action error when big.
When carrying out output circuit numerical control system, as shown in Figure 6, comprising the steps: to carry out the output circuit number calculates, compare to fixed number with the loop,, then change E1 flow process (dropping into output) over to if judge and to connect, can disjunction if judge, then change E2 flow process (excision output) over to,, then change E3 flow process (being back to voltage control) over to if judge and to export.
The effect of output circuit numerical control system is: with the final restraint conditions of output circuit number as connection or disjunction action, no matter the parameter state of front how, the necessary condition of final action is that the output circuit number must can be connected or can disjunction, thus with the output circuit number as final Control Parameter.
With voltage is primary controlled condition, guarantees the reactive-load compensator normal running conditions; With the electric current is action constraints, prevents the reactive-load compensator misoperation; With the power factor is the major control amount, determines the reactive power compensation amount; For auxiliary major control physical quantity, prevent the reactive-load compensator misoperation with reactive current; With the output circuit number is the output action necessary condition; The shortcoming (the easy throw in-of oscillation of power factor type underload, reactive power type, easy misoperation when the voltage fluctuation of reactive current type reactive-load compensator is big) that has produced when having avoided original single master control physical quantity to control realizes comprehensive, stable control.
Fig. 7 is a certain reactive-load compensator (rated operational voltage 380V, output circuit several 10) overall plan schematic diagram, (Us, Is represent voltage, electric current input respectively) in the drawings, single-chip microcomputer carries out data sampling, data analysis by peripheral circuit to the place electrical network and according to keyboard to set up data is handled, and delivers to show output and control output.Fig. 8 is certain reactive-load compensator master control program process blocks schematic diagram (calculating of relevant voltage, electric current, power factor, reactive current, output circuit number etc. will be described below), also is the supplementary notes to control method among Fig. 7.Fig. 9 reactive-load compensator is an output program process blocks schematic diagram, also is the supplementary notes to Fig. 8.
According to Fig. 7-Fig. 9, describe control method of the present invention in detail below.
At first carry out voltage sample (employing universal circuit), and calculate the magnitude of voltage of current electrical network by data processing (single-chip microcomputer).Computational methods can adopt the arithmetic average value-based algorithm, that is:
Wherein, n is an integer, can get n=10 here, promptly gets mean value 10 times; Also can pass through the recurrence average value-based algorithm, that is:
Simultaneously also can in program, calculate voltage U by other algorithm.
Voltage setting value to voltage U and user's (keyboard) compares then, and several situations are arranged:
(1) if voltage U greater than overvoltage set point (scope 400V～450V can set), then the overvoltage indicator light is bright, changing the output circuit number simultaneously over to differentiates, as if on output circuit number is not 0, then disjunction No. one output circuit, return voltage sampling again, calculation process place again; If on output circuit number is 0, then do not take the excision action, directly return voltage sampling, calculation process place.
(2) if voltage U less than under voltage set point (300V can not set), then the under voltage indicator light is bright, change the output circuit number simultaneously over to and differentiate, if on output circuit number is not 0, then disjunction No. one output circuit, return voltage sampling again, calculation process place again; If on output circuit number is 0, then do not take the disjunction action, directly return voltage sampling, calculation process place.
(3) if voltage U smaller or equal to overvoltage set point (scope 400V～450V can set) and more than or equal under voltage set point (300V can not set), then voltage U satisfies normal running conditions, changes Current Control over to.
Can guarantee the normal working voltage of reactive-load compensator by voltage control, avoid reactive-load compensator to load on the phenomenon of easily burning under the over-voltage condition.
Current Control comprises current sample (employing universal circuit), and calculates the current value of current electrical network by data processing (single-chip microcomputer).Computational methods can adopt the arithmetic average value-based algorithm, that is:
Wherein, n is an integer, can get n=10 here, promptly gets mean value 10 times; Also can pass through the recurrence average value-based algorithm, that is:
Simultaneously also can in program, calculate electric current I by other algorithm.
Current setting value to electric current I and user's (keyboard) compares then, and several situations are arranged:
(1) (50mA～500mA), then the undercurrent indicator light is bright, changes the differentiation of output circuit number simultaneously over to, is not 0 as if on output circuit number, then disjunction No. one output circuit, return voltage sampling again, calculation process place again if electric current I is less than user's current setting value; If on output circuit number is 0, then do not take the disjunction action, directly return voltage sampling, calculation process place.
(2) if electric current I more than or equal to user's current setting value (50mA～500mA can set), then electric current I satisfies normal running conditions, changes power factor controlling over to.
Guaranteed that by Current Control the reactive-load compensator compensation time will have certain load, can avoid under underloading situation power factor type reactive-load compensator that the situation of throw in-of oscillation takes place easily mostly.
Power factor controlling comprises the power factor sampling, and calculates the power factor of current electrical network by data processing (single-chip microcomputer).Computational methods can adopt power method, that is:
S=U * I,
Wherein n is an integer, can get n=10 here, promptly gets 10 mean values; Also can be by recording the phase angle between voltage U and the electric current I
Calculate
Right simultaneously
Get arithmetic mean, that is:
Wherein n is an integer, S represents apparent power, P represents active power, and U represents voltage effective value, and I represents current effective value, U1 is the instantaneous sampling value of the voltage first time, I1 is the instantaneous sampling value of the electric current first time, and U2 is the instantaneous sampling value of the voltage second time, and I2 is the instantaneous sampling value of the electric current second time, Un is the instantaneous sampling value of the n time voltage, and In is the instantaneous sampling value of n primary current.Can get n=10 here, promptly get mean value 10 times.
Power factor set point to power factor and user's (keyboard) compares then, and several situations are arranged:
(1) if power factor is excised thresholding set point (0.94～-0.99, can set) more than or equal to the user, then is expressed as leading state, changing the output circuit number simultaneously over to differentiates, as if on output circuit number is not 0, then disjunction No. one output circuit, return voltage sampling again, calculation process place again; If on output circuit number is 0, then do not take the disjunction action, directly return voltage sampling, calculation process place.
(2) if power factor drops into thresholding set point (0.99～0.80) smaller or equal to the user, then be expressed as hysteretic state, change reactive current control over to.
(3) if power factor greater than dropping into thresholding and less than the excision thresholding, then representing to be in stable state, is not taked output action, directly return voltage sampling, calculation process place.
By power factor controlling, can judge whether product satisfies throwing, tangent condition, for compensation provides important evidence.
Reactive current control comprises the power factor sampling, and calculates the reactive current value Iq of current electrical network by data processing (single-chip microcomputer).Computational methods can adopt
Draw reactive current.
Reactive current set point to reactive current Iq and user's (keyboard) compares then, and several situations are arranged:
(1) the reactive current value is set (thresholding) value (for example 20A/400V) greater than reactive current, represent that then next step drops into electric capacity and can not cause in advance, can drop into, if on output circuit number is not 10 (expression also has the backlash road), then connect No. one output circuit, return voltage sampling then, calculation process place.
(2), represent that then next step drops into electric capacity and can cause in advance, does not then take to drop into action, directly return voltage sampling, calculation process place if the reactive current value is set (thresholding) value (for example 20A) smaller or equal to reactive current.Attention is carried out voltage compensation to reactive current threshold value (nominal value), and for example if certain reactive current thresholding is 20A/400V, this moment, voltage was 440V, and then the reactive current thresholding also should be enlarged into 22A/440V in proportion.
By reactive current control, can avoid the phenomenon of throw in-of oscillation.Simultaneously again because of the reactive current threshold value has been taked voltage compensation,, avoid misoperation so can eliminate because voltage fluctuation brings bigger action error than greatly the time.
The output circuit numerical control is made as final output constraint condition, and a plurality of inlets are arranged in whole multi parameters control.The output circuit number of this product is 10, and expression can be exported 10 group capacitor groups at most.When carrying out output circuit numerical control system, calculate the on output circuit earlier and count L (L is an integer, and L≤10), calculate the access failure output circuit and count M (M is an integer, and M=10-L).Then the output circuit number is differentiated, several situations is arranged:
(1) when dropping into differentiation, if M is not equal to 0, expression can also drop into, and then takes to drop into action, return voltage sampling then, calculation process place; If M=0, expression cannot drop into, and does not then take output action, directly return voltage sampling, calculation process place.
(2) when excising differentiation, if L is not equal to 0, expression can also be excised, and then takes the excision action, return voltage sampling then, calculation process place; If L=0, expression cannot be excised, and does not then take output action, directly return voltage sampling, calculation process place.
The return voltage sampling of above-mentioned many places, calculation process place, i.e. expression restarts to carry out voltage control, order is carried out Current Control, power factor controlling, reactive current control, output circuit numerical control system then, whole process is a systemic circulation, can make corresponding processing at the parameter situation (voltage, electric current, power factor, reactive current, output circuit number) that product constantly changes, realize Comprehensive Control, stable control.
Shortcoming (the easy throw in-of oscillation of power factor type underload that this control method has produced when principle has avoided original single master control physical quantity to control, reactive power type, easy misoperation when the voltage fluctuation of reactive current type reactive-load compensator is big), can realize comprehensive, stable control, reach better technical effect.
The front provides the description to preferred embodiment, so that any technical staff in this area can use or utilize the present invention.To this preferred embodiment, those skilled in the art can make various modifications or conversion on the basis that does not break away from the principle of the invention.Be that every simple, equivalence of doing according to the claims and the description of the present patent application changes and modification, all fall into the claim protection range of patent of the present invention.
Claims (10)
1, a kind of power-less compensation control method comprises the steps:
1) magnitude of voltage and the voltage setting value with current electrical network compares, if this magnitude of voltage is greater than the overvoltage set point or less than the under voltage set point, and then redirect execution in step 6; Otherwise
2) current value and the current setting value with current electrical network compares, if this electric current is less than current setting value, and then redirect execution in step 6; Otherwise
3) power factor and the thresholding set point with current electrical network compares, if this power factor is more than or equal to excision thresholding set point, then redirect execution in step 6; If this power factor is then returned step 1 less than excision thresholding set point and greater than dropping into the thresholding set point; Otherwise
4) reactive current value and the reactive current set point with current electrical network compares, if the reactive current value smaller or equal to the reactive current set point, is then returned step 1; Otherwise
5) calculate the access failure output circuit and count M; If M is not equal to 0, then connect No. one output circuit, return step 1 then; If M equals 0, then directly return step 1;
6) calculate the on output circuit and count L; If L is not equal to 0, then disjunction No. one output circuit returns step 1 then; If L equals 0, then directly return step 1.
2, power-less compensation control method as claimed in claim 1 is characterized in that, the magnitude of voltage of described current electrical network obtains as follows:
Carry out voltage sample by voltage sampling circuit;
Handle by single-chip data, calculate the magnitude of voltage of current electrical network.
3, power-less compensation control method as claimed in claim 2 is characterized in that, the magnitude of voltage that single-chip microcomputer calculates current electrical network adopts arithmetic average value-based algorithm or recurrence average value-based algorithm.
4, power-less compensation control method as claimed in claim 1 is characterized in that, the current value of described current electrical network obtains as follows:
Carry out current sample by current sampling circuit;
Handle by single-chip data, calculate the current value of current electrical network.
5, power-less compensation control method as claimed in claim 4 is characterized in that, the current value that single-chip microcomputer calculates current electrical network adopts arithmetic average value-based algorithm or recurrence average value-based algorithm.
6, power-less compensation control method as claimed in claim 1 is characterized in that, the power factor of described current electrical network obtains as follows:
Handle by single-chip data, calculate the power factor of current electrical network.
7, power-less compensation control method as claimed in claim 6 is characterized in that, the power factor that single-chip microcomputer calculates current electrical network adopts power method, promptly
S=U * I,
Wherein n is an integer, S represents apparent power, P represents active power, and U represents voltage effective value, and I represents current effective value, U1 is the instantaneous sampling value of the voltage first time, I1 is the instantaneous sampling value of the electric current first time, and U2 is the instantaneous sampling value of the voltage second time, and I2 is the instantaneous sampling value of the electric current second time, Un is the instantaneous sampling value of the n time voltage, and In is the instantaneous sampling value of n primary current.
8, power-less compensation control method as claimed in claim 6 is characterized in that, the power factor that single-chip microcomputer calculates current electrical network as follows:
Record the phase angle between voltage U and the electric current I
Calculate
Right
Get arithmetic mean, that is:
Wherein n is an integer.
9, power-less compensation control method as claimed in claim 8 is characterized in that, the reactive current value of described current electrical network obtains as follows:
Handle by single-chip data, calculate the reactive current value of current electrical network.
10, power-less compensation control method as claimed in claim 9 is characterized in that, single-chip microcomputer calculates the reactive current value of current electrical network
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1060723A (en) * | 1990-10-08 | 1992-04-29 | 徐福海 | Power factory monitoring method and device |
| JPH09322407A (en) * | 1996-05-27 | 1997-12-12 | Nissin Electric Co Ltd | Control method for reactive power compensator |
| JP2000156902A (en) * | 1998-11-19 | 2000-06-06 | Nissin Electric Co Ltd | Method and apparatus for control of electric railroad rolling stock |
| CN1571237A (en) * | 2004-04-29 | 2005-01-26 | 江苏省电力公司泰州供电公司 | Dynamic control method for capacitor switching in low-voltage reactive compensation |
| US20050184708A1 (en) * | 2004-02-24 | 2005-08-25 | William Pippin | Power factor correction circuit |
-
2006
- 2006-11-03 CN CNB2006101179762A patent/CN100438256C/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1060723A (en) * | 1990-10-08 | 1992-04-29 | 徐福海 | Power factory monitoring method and device |
| JPH09322407A (en) * | 1996-05-27 | 1997-12-12 | Nissin Electric Co Ltd | Control method for reactive power compensator |
| JP2000156902A (en) * | 1998-11-19 | 2000-06-06 | Nissin Electric Co Ltd | Method and apparatus for control of electric railroad rolling stock |
| US20050184708A1 (en) * | 2004-02-24 | 2005-08-25 | William Pippin | Power factor correction circuit |
| CN1571237A (en) * | 2004-04-29 | 2005-01-26 | 江苏省电力公司泰州供电公司 | Dynamic control method for capacitor switching in low-voltage reactive compensation |
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| CN1979993A (en) | 2007-06-13 |
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Assignee: Zhejiang Delixi International Electrical Co., Ltd. Assignor: Delixi Group Instrument & Meter Co., Ltd. Contract fulfillment period: 2008.12.17 to 2013.12.16 contract change Contract record no.: 2009330000128 Denomination of invention: Power-less compensation control method Granted publication date: 20081126 License type: Exclusive license Record date: 2009.1.16 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.12.17 TO 2013.12.16; CHANGE OF CONTRACT Name of requester: ZHEJIANG PROVINCE DELIXI INTERNATIONAL POWER CO., Effective date: 20090116 |