CN108206526A - A kind of capacitor switching partition control method and device - Google Patents
A kind of capacitor switching partition control method and device Download PDFInfo
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- CN108206526A CN108206526A CN201810059362.6A CN201810059362A CN108206526A CN 108206526 A CN108206526 A CN 108206526A CN 201810059362 A CN201810059362 A CN 201810059362A CN 108206526 A CN108206526 A CN 108206526A
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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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
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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
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The present invention a kind of capacitor switching partition control method of offer and device, subregion has been carried out to it according to the voltage value per phase in three-phase bus and reactive-load compensation amount, then control method of capacitor switching has been formulated it in the section according to residing for each phase, preferentially benefit capacitor is divided to carry out switching corresponding phase, so three-phase imbalance will not be caused.When all points of benefit capacitors of certain phase are all put into or after switching, if this mutually cannot still be in ideal operation interval, then switching is carried out to common benefit capacitor；Since all points of benefit capacitors of the phase at this time all have been put into or cut off, so the difference in voltage between three-phase is minimum at this time, the probability that three-phase imbalance occurs is reduced.
Description
Technical field
The invention belongs to the control of reactive power compensating technical fields of electric system, and in particular to a kind of capacitor switching subregion control
Method and apparatus processed.
Background technology
The power of power grid output includes two parts；First, active power；Second is that reactive power.Electric energy is directly consumed, electricity
Mechanical energy, thermal energy, chemical energy or acoustic energy can be changed into, using these energy works done, this Partial Power is known as active power；It does not consume
Electric energy only converts electrical energy into another form of energy, and this energy be capable of the necessary requirement of work done as electrical equipment, and
And this can be periodically switched in power grid with electric energy, this Partial Power is known as reactive power, as electromagnetic component is established
The electric energy that magnetic field occupies, capacitor establish the electric energy shared by electric field.
Electric current is in inductance element during work done, and current hysteresis is after 90 ° of voltage, and electric current is in capacitor element during work done,
90 ° of electric current leading voltage.In same circuit, inductive current is opposite with condenser current direction, 180 ° of mutual deviation.If in electromagnetism
Capacitor element in element circuitry is installed proportionally, the electric current of the two is made to cancel out each other, makes the vector and voltage vector of electric current
Between angle reduce.The device with capacitive power load and inductive load and same circuit is connected in, energy exists
It is exchanged with each other between two kinds of loads.In this way, the reactive power that the required reactive power of inductive load can be exported by capacitive load
Compensation.
Reactive power compensation, and referred to as reactive-load compensation play the power factor for improving power grid in power supply system
Effect, can reduce the loss of supply transformer and landline, improve power supply efficiency, improve power supply environment, it is rational to select
Compensation device is selected, can accomplish to reduce the loss of power grid to greatest extent, improves power grid quality.
Existing reactive power compensator is that one group of compensation capacitor is set in circuit, as shown in Figure 1, single in every phase
The compensation capacitor solely set is point benefit capacitor, for mutually individually carrying out reactive-load compensation to corresponding；It is set jointly between three-phase
The compensation capacitor put is mends capacitor altogether, for being carried out at the same time reactive-load compensation to three-phase.By to dividing benefit capacitor and common benefit
The switching control of capacitor, can be adjusted the voltage of three-phase bus.It is using point benefit capacitor or is mending capacitor altogether
When the voltage of three-phase bus is adjusted, it is likely that the problem of causing imbalance of three-phase voltage.
Invention content
The present invention provides a kind of capacitor switching partition control method and device, for solve switching divide benefit capacitor or
When person mends capacitor altogether, the problem of caused imbalance of three-phase voltage.
A kind of capacitor switching partition control method, includes the following steps：
According to the deficient benefit preset value of the upper voltage limit value of each phase of three-phase bus, lower limiting value and its reactive-load compensation amount, cross and mend in advance
If value, subregion is carried out according to following conditions：
Section 1：The voltage value of the phase is more than, and reactive-load compensation amount is less than deficient benefit preset value；
Section 2a：The difference that the voltage value of the phase is more than between voltage preset lower limit value, with voltage preset upper limit value is less than
First preset value, and the reactive-load compensation amount of the phase is less than deficient benefit preset value；
Section 2b：The difference that the voltage value of the phase is more than between voltage preset lower limit value, with voltage preset upper limit value is more than
First preset value, and the reactive-load compensation amount of the phase is less than deficient benefit preset value；
Section 3：The voltage value of the phase is less than voltage preset lower limit value, and reactive-load compensation amount is more than deficient benefit preset value, is less than
Cross benefit preset value；
Section 4：The voltage value of the phase is less than voltage preset lower limit value, and reactive-load compensation amount was more than benefit preset value；
Section 5a：The difference that the voltage value of the phase is less than between voltage preset upper limit value, with voltage preset lower limit value is less than
Second preset value, and the reactive-load compensation amount of the phase was more than benefit preset value；
Section 5b：The difference that the voltage value of the phase is less than between voltage preset upper limit value, with voltage preset lower limit value is more than
Second preset value, and the reactive-load compensation amount of the phase was more than benefit preset value；
Section 6：The voltage value of the phase is more than pressure preset upper limit value, and reactive-load compensation amount is more than deficient benefit preset value, less than pressure
Preset upper limit value；
Section 7：The voltage value of the phase is between voltage preset lower limit value and voltage preset upper limit value；And reactive-load compensation amount exists
It crosses between benefit preset value and deficient benefit preset value；
The section residing for each phase of three-phase bus is detected, when certain is mutually in section 3 or section 4, is judged input by the phase
Divide whether benefit capacitor is less than point benefit way of the phase；If it is less, put into point benefit capacitor of the phase；Otherwise, institute is put into
State the common benefit capacitor of three-phase bus；
When certain is mutually in section 1 or section 6, judge whether point benefit capacitor input by the phase of overtension is more than
In 1；If it is larger than or equal to then cutting off point benefit capacitor of the phase；Otherwise, the common benefit capacitor of the three-phase bus is cut off.
A kind of capacitor switching partition control method provided by the present invention, when the voltage value of certain phase in three-phase bus is too small or
When excessive, first benefit capacitor is divided to carry out switching, other phase attonitys, so three-phase imbalance will not be caused the phase.When this
All points of benefit capacitors of phase all put into or switching after, if the voltage value of the phase is still too small or excessive, to it is common mend electricity
Container carries out switching；Since all points of benefit capacitors of the phase at this time all have been put into or cut off, so at this time between three-phase
Difference in voltage is minimum, reduces the probability that three-phase imbalance occurs.
Further, when certain of three-phase bus is mutually in section 2b, point benefit capacitor of the phase is put into；Work as three-phase bus
When certain is mutually in section 5b, point benefit capacitor of the phase is cut off；When certain of three-phase bus is mutually in section 2a, section 5a or area
Between 7 when, the action of no switching.
It is in optimal working condition, so not needing to perform switching when certain in three-phase bus is mutually in section 7
Action；When certain in three-phase bus is mutually in section 2a, section 5a, in order to avoid concussion caused by switched capacitor, so
Switching action is not performed yet；When three-phase bus is mutually in section 2b, this is mutually in undercompensation state, when three-phase bus phase
This, so the two sections only divide benefit capacitor to carry out switching the phase, prevents mutually in overcompensation state during in section 5b
Only there is three-phase imbalance.
Further, after the common benefit capacitor of three-phase bus all puts into common benefit, this is mutually still in section 3 or section
4, then send out the too low warning of the phase voltage.
Further, after the common benefit capacitor of three-phase bus is all cut off, this is mutually still in section 1 or section 6, then
Send out the excessively high warning of the phase voltage.
A kind of capacitor switching zone control device, including processor；
The processor is owed for upper voltage limit value, lower limiting value and its reactive-load compensation amount according to each phase of three-phase bus
It mends preset value, cross benefit preset value, subregion is carried out according to following conditions：
Section 1：The voltage value of the phase is more than, and reactive-load compensation amount is less than deficient benefit preset value；
Section 2a：The difference that the voltage value of the phase is more than between voltage preset lower limit value, with voltage preset upper limit value is less than
First preset value, and the reactive-load compensation amount of the phase is less than deficient benefit preset value；
Section 2b：The difference that the voltage value of the phase is more than between voltage preset lower limit value, with voltage preset upper limit value is more than
First preset value, and the reactive-load compensation amount of the phase is less than deficient benefit preset value；
Section 3：The voltage value of the phase is less than voltage preset lower limit value, and reactive-load compensation amount is more than deficient benefit preset value, is less than
Cross benefit preset value；
Section 4：The voltage value of the phase is less than voltage preset lower limit value, and reactive-load compensation amount was more than benefit preset value；
Section 5a：The difference that the voltage value of the phase is less than between voltage preset upper limit value, with voltage preset lower limit value is less than
Second preset value, and the reactive-load compensation amount of the phase was more than benefit preset value；
Section 5b：The difference that the voltage value of the phase is less than between voltage preset upper limit value, with voltage preset lower limit value is more than
Second preset value, and the reactive-load compensation amount of the phase was more than benefit preset value；
Section 6：The voltage value of the phase is more than pressure preset upper limit value, and reactive-load compensation amount is more than deficient benefit preset value, less than pressure
Preset upper limit value；
Section 7：The voltage value of the phase is between voltage preset lower limit value and voltage preset upper limit value；And reactive-load compensation amount exists
It crosses between benefit preset value and deficient benefit preset value；
The processor is additionally operable to the section residing for detection each phase of three-phase bus, when certain is mutually in section 3 or section 4,
Judge whether point benefit capacitor input by the phase is less than point benefit way of the phase；If it is less, put into point benefit electricity of the phase
Container；Otherwise, the common benefit capacitor of the three-phase bus is put into；
When certain is mutually in section 1 or section 6, judge whether point benefit capacitor input by the phase of overtension is more than
In 1；If it is larger than or equal to then cutting off point benefit capacitor of the phase；Otherwise, the common benefit capacitor of the three-phase bus is cut off.
Further, when certain of three-phase bus is mutually in section 2b, point benefit capacitor of the phase is put into；Work as three-phase bus
When certain is mutually in section 5b, point benefit capacitor of the phase is cut off；When certain of three-phase bus is mutually in section 2a, section 5a or area
Between 7 when, the action of no switching.
Further, after the common benefit capacitor of three-phase bus all puts into common benefit, this is mutually still in section 3 or section
4, then send out the too low warning of the phase voltage.
Further, after the common benefit capacitor of three-phase bus is all cut off, this is mutually still in section 1 or section 6, then
Send out the excessively high warning of the phase voltage.
Description of the drawings
Fig. 1 is point schematic diagram mended and mended altogether；
Fig. 2 is capacitor switching block plan in capacitor switching block plan in embodiment of the method 1 and embodiment of the method 2；
Fig. 3 is the control flow chart of switched capacitor when single-phase voltage is too low in embodiment of the method 1；
Fig. 4 is the control flow chart of switched capacitor when single-phase voltage is excessively high in embodiment of the method 2.
Specific embodiment
The present invention provides a kind of capacitor switching partition control method and device, for solve using divide benefit capacitor or
Capacitor is mended altogether when the voltage of three-phase bus is adjusted, the problem of caused imbalance of three-phase voltage.
A kind of capacitor switching partition control method, includes the following steps：
According to the deficient benefit preset value of the upper voltage limit value of each phase of three-phase bus, lower limiting value and its reactive-load compensation amount, cross and mend in advance
If value, subregion is carried out according to following conditions：
Section 1：The voltage value of the phase is more than, and reactive-load compensation amount is less than deficient benefit preset value；
Section 2a：The difference that the voltage value of the phase is more than between voltage preset lower limit value, with voltage preset upper limit value is less than
First preset value, and the reactive-load compensation amount of the phase is less than deficient benefit preset value；
Section 2b：The difference that the voltage value of the phase is more than between voltage preset lower limit value, with voltage preset upper limit value is more than
First preset value, and the reactive-load compensation amount of the phase is less than deficient benefit preset value；
Section 3：The voltage value of the phase is less than voltage preset lower limit value, and reactive-load compensation amount is more than deficient benefit preset value, is less than
Cross benefit preset value；
Section 4：The voltage value of the phase is less than voltage preset lower limit value, and reactive-load compensation amount was more than benefit preset value；
Section 5a：The difference that the voltage value of the phase is less than between voltage preset upper limit value, with voltage preset lower limit value is less than
Second preset value, and the reactive-load compensation amount of the phase was more than benefit preset value；
Section 5b：The difference that the voltage value of the phase is less than between voltage preset upper limit value, with voltage preset lower limit value is more than
Second preset value, and the reactive-load compensation amount of the phase was more than benefit preset value；
Section 6：The voltage value of the phase is more than pressure preset upper limit value, and reactive-load compensation amount is more than deficient benefit preset value, less than pressure
Preset upper limit value；
Section 7：The voltage value of the phase is between voltage preset lower limit value and voltage preset upper limit value；And reactive-load compensation amount exists
It crosses between benefit preset value and deficient benefit preset value；
The section residing for each phase of three-phase bus is detected, if certain is mutually in section 3 or section 4, is judged input by the phase
Divide benefit capacitor whether be less than the phase point mend way；If it is less, put into point benefit capacitor of the phase；Otherwise, it puts into
The common benefit capacitor of the three-phase bus；
When certain is mutually in section 1 or section 6, judge whether point benefit capacitor input by the phase of overtension is more than
In 1；If it is larger than or equal to then cutting off point benefit capacitor of the phase；Otherwise, the common benefit capacitor of the three-phase bus is cut off.
The present invention is described in detail below in conjunction with the accompanying drawings.
The present embodiment provides a kind of reactive-load compensation capacitor switching control device, including processor, is connected on processor
There is the device due to detecting three-phase bus voltage.
For processor for carrying out data processing, specific method is as follows：
Subregion is carried out according to the voltage per phase in three-phase bus and reactive-load compensation amount first, block plan is as shown in Figure 2：
When the voltage value of three-phase bus phase is more than UH, and reactive-load compensation amount is less thanWhen, it is judged as that this is mutually in
Section 1；
When the voltage value of three-phase bus phase is more than UH, and reactive-load compensation amount is more thanIt is less thanWhen, sentence
Break and be mutually in section 6 for this；
When the voltage value of three-phase bus phase is less than UL, and reactive-load compensation amount is more thanIt is less thanWhen, sentence
Break and be mutually in section 3 for this；
When the voltage value of three-phase bus phase is less than UL, and during reactive-load compensation amount, and reactive-load compensation amount is more thanWhen,
It is judged as that this is mutually in section 4；
When the voltage value of three-phase bus phase is more than ULAnd less than UH, and the reactive-load compensation amount of the phase is less than
When：
If the voltage value and U of the phaseHBetween difference be less than Δ U1, it is judged as that this is mutually in section 2a；
If the voltage value and U of the phaseHBetween difference be more than Δ U1, it is judged as that this is mutually in section 2b；
When the voltage value of three-phase bus phase is more than ULAnd less than UH, and the reactive-load compensation amount of the phase is more than
When：
If the voltage value and U of the phaseLBetween difference be less than Δ U2, it is judged as that this is mutually in section 5a；
If the voltage value and U of the phaseLBetween difference be more than Δ U2, it is judged as that this is mutually in section 5b；
When the voltage value of three-phase bus phase is more than ULAnd less than UH, and reactive-load compensation amount is less thanIt is more thanWhen, it is judged as that this is mutually in section 7.
Above-mentioned ULFor voltage preset lower limit value, UHFor voltage preset upper limit value,It owes to mend preset value,
To cross benefit preset value, Δ U1For the first preset value, Δ U2For the second preset value.
Then the voltage and current of three-phase bus is detected, judges the section residing for each phase；
When three-phase bus is mutually in section 7, this mutually in ideal interval, mends not to point benefit capacitor and altogether capacitor
Carry out switching action；
When three-phase bus is mutually in section 2a, in order to avoid switching shakes, capacitance is mended not to point benefit capacitor and altogether
Device carries out switching action；
When three-phase bus is mutually in section 5a, in order to avoid switching shakes, capacitance is mended not to point benefit capacitor and altogether
Device carries out switching action；
When three-phase bus is mutually in section 2b, point benefit capacitor of the phase is put into；
When three-phase bus is mutually in section 5b, point benefit capacitor of the phase is cut off；
When the voltage of three-phase bus phase is in section 3 or section 4, as A phases are in section 3 or section in three-phase bus
When 4, then to the flow chart of A phase voltages adjusting as shown in figure 3, step is as follows：
(1) judge whether a point benefit capacitors count for A phase input compensations is less than a point benefit way；
If it is less, a point benefit capacitors count for the input compensation of A phases adds one, that is, increase point benefit electricity input by A phases
Container；
Otherwise enter in next step；
(2) judge whether the common complement amount input by three-phase bus is less than and mend way altogether；
If it is less, complement amount adds one altogether, that is, increase the quantity for mending capacitor altogether；
Otherwise enter in next step；
(3) alarm of " A phase voltages are too low " is sent out.
When the voltage of three-phase bus phase is in section 1 or section 6, as A phases are in section 1 or section in three-phase bus
When 6, then to the flow chart of A phase voltages adjusting as shown in figure 4, step is as follows：
(1) judge whether a point benefit capacitors count for A phase input compensations is more than or equal to 1；
If it is larger than or equal to then a point benefit capacitors count for the input compensation of A phases subtracts one, that is, cuts off input by an A phase
Divide benefit capacitor；
Otherwise enter in next step；
(2) judge whether the common complement amount input by three-phase bus is more than or equal to 1；
If it is larger than or equal to then complement amount subtracts one altogether, that is, cuts off one group and mend capacitor altogether；
Otherwise enter in next step；
(3) alarm of " A phase voltages are excessively high " is sent out.
Specific embodiment of the present invention is presented above, but the present invention is not limited to described embodiment.
Under the thinking provided in the present invention, to the skill in above-described embodiment by the way of being readily apparent that those skilled in the art
Art means are converted, are replaced, are changed, and play the role of with the present invention in relevant art means it is essentially identical, realize
Goal of the invention it is also essentially identical, the technical solution formed in this way is finely adjusted above-described embodiment to be formed, this technology
Scheme is still fallen in protection scope of the present invention.
Claims (8)
1. a kind of capacitor switching partition control method, which is characterized in that include the following steps：
(1) it is mended according to the deficient benefit preset value of the upper voltage limit value of each phase of three-phase bus, lower limiting value and its reactive-load compensation amount, excessively default
Value carries out subregion according to following conditions：
Section 1：The voltage value of the phase is more than, and reactive-load compensation amount is less than deficient benefit preset value；
Section 2a：The difference that the voltage value of the phase is more than between voltage preset lower limit value, with voltage preset upper limit value is less than first
Preset value, and the reactive-load compensation amount of the phase is less than deficient benefit preset value；
Section 2b：The difference that the voltage value of the phase is more than between voltage preset lower limit value, with voltage preset upper limit value is more than first
Preset value, and the reactive-load compensation amount of the phase is less than deficient benefit preset value；
Section 3：The voltage value of the phase is less than voltage preset lower limit value, and reactive-load compensation amount is more than deficient benefit preset value, is mended less than crossing
Preset value；
Section 4：The voltage value of the phase is less than voltage preset lower limit value, and reactive-load compensation amount was more than benefit preset value；
Section 5a：The difference that the voltage value of the phase is less than between voltage preset upper limit value, with voltage preset lower limit value is less than second
Preset value, and the reactive-load compensation amount of the phase was more than benefit preset value；
Section 5b：The difference that the voltage value of the phase is less than between voltage preset upper limit value, with voltage preset lower limit value is more than second
Preset value, and the reactive-load compensation amount of the phase was more than benefit preset value；
Section 6：The voltage value of the phase is more than pressure preset upper limit value, and reactive-load compensation amount is more than deficient benefit preset value, default less than pressure
Upper limit value；
Section 7：The voltage value of the phase is between voltage preset lower limit value and voltage preset upper limit value；And reactive-load compensation amount is crossing benefit
Between preset value and deficient benefit preset value；
(2) section residing for each phase of three-phase bus is detected, when certain is mutually in section 3 or section 4, judges point input by the phase
Mend point benefit way whether capacitor is less than the phase；If it is less, put into point benefit capacitor of the phase；Otherwise, described in input
The common benefit capacitor of three-phase bus；
When certain is mutually in section 1 or section 6, judge whether point benefit capacitor input by the phase of overtension is more than or equal to 1；
If it is larger than or equal to then cutting off point benefit capacitor of the phase；Otherwise, the common benefit capacitor of the three-phase bus is cut off.
2. a kind of capacitor switching partition control method according to claim 1, which is characterized in that when certain of three-phase bus
When being mutually in section 2b, point benefit capacitor of the phase is put into；When three-phase bus is mutually in section 5b, point benefit of the phase is cut off
Capacitor；When certain of three-phase bus is mutually in section 2a, section 5a or section 7, no switching action.
3. a kind of capacitor switching partition control method according to claim 1, which is characterized in that when being total to for three-phase bus
After benefit capacitor all puts into common benefit, this is mutually still in section 3 or section 4, then sends out the too low warning of the phase voltage.
4. a kind of capacitor switching partition control method according to claim 1, which is characterized in that when being total to for three-phase bus
After benefit capacitor is all cut off, this is mutually still in section 1 or section 6, then sends out the excessively high warning of the phase voltage.
5. a kind of capacitor switching zone control device, which is characterized in that including processor；
The processor, it is pre- for upper voltage limit value, the deficient benefit of lower limiting value and its reactive-load compensation amount according to each phase of three-phase bus
If value crosses benefit preset value, subregion is carried out according to following conditions：
Section 1：The voltage value of the phase is more than, and reactive-load compensation amount is less than deficient benefit preset value；
Section 2a：The difference that the voltage value of the phase is more than between voltage preset lower limit value, with voltage preset upper limit value is less than first
Preset value, and the reactive-load compensation amount of the phase is less than deficient benefit preset value；
Section 2b：The difference that the voltage value of the phase is more than between voltage preset lower limit value, with voltage preset upper limit value is more than first
Preset value, and the reactive-load compensation amount of the phase is less than deficient benefit preset value；
Section 3：The voltage value of the phase is less than voltage preset lower limit value, and reactive-load compensation amount is more than deficient benefit preset value, is mended less than crossing
Preset value；
Section 4：The voltage value of the phase is less than voltage preset lower limit value, and reactive-load compensation amount was more than benefit preset value；
Section 5a：The difference that the voltage value of the phase is less than between voltage preset upper limit value, with voltage preset lower limit value is less than second
Preset value, and the reactive-load compensation amount of the phase was more than benefit preset value；
Section 5b：The difference that the voltage value of the phase is less than between voltage preset upper limit value, with voltage preset lower limit value is more than second
Preset value, and the reactive-load compensation amount of the phase was more than benefit preset value；
Section 6：The voltage value of the phase is more than pressure preset upper limit value, and reactive-load compensation amount is more than deficient benefit preset value, default less than pressure
Upper limit value；
Section 7：The voltage value of the phase is between voltage preset lower limit value and voltage preset upper limit value；And reactive-load compensation amount is crossing benefit
Between preset value and deficient benefit preset value；
The processor is additionally operable to the section residing for detection each phase of three-phase bus, when certain is mutually in section 3 or section 4, judges
Divide point benefit way whether benefit capacitor is less than the phase input by the phase；If it is less, put into point benefit capacitor of the phase；
Otherwise, the common benefit capacitor of the three-phase bus is put into；
When certain is mutually in section 1 or section 6, judge whether point benefit capacitor input by the phase of overtension is more than or equal to 1；
If it is larger than or equal to then cutting off point benefit capacitor of the phase；Otherwise, the common benefit capacitor of the three-phase bus is cut off.
6. a kind of capacitor switching zone control device according to claim 5, which is characterized in that when certain of three-phase bus
When being mutually in section 2b, point benefit capacitor of the phase is put into；When three-phase bus is mutually in section 5b, point benefit of the phase is cut off
Capacitor；When certain of three-phase bus is mutually in section 2a, section 5a or section 7, no switching action.
7. a kind of capacitor switching zone control device according to claim 5, which is characterized in that when being total to for three-phase bus
After benefit capacitor all puts into common benefit, this is mutually still in section 3 or section 4, then sends out the too low warning of the phase voltage.
8. a kind of capacitor switching zone control device according to claim 5, which is characterized in that when being total to for three-phase bus
After benefit capacitor is all cut off, this is mutually still in section 1 or section 6, then sends out the excessively high warning of the phase voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810059362.6A CN108206526B (en) | 2018-01-22 | 2018-01-22 | Capacitor switching partition control method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810059362.6A CN108206526B (en) | 2018-01-22 | 2018-01-22 | Capacitor switching partition control method and device |
Publications (2)
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| CN108206526B (en) | 2020-12-04 |
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