CN106385041A - Three-grade low-voltage power distribution network voltage control device and control method thereof - Google Patents
Three-grade low-voltage power distribution network voltage control device and control method thereof Download PDFInfo
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- CN106385041A CN106385041A CN201610984819.5A CN201610984819A CN106385041A CN 106385041 A CN106385041 A CN 106385041A CN 201610984819 A CN201610984819 A CN 201610984819A CN 106385041 A CN106385041 A CN 106385041A
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Classifications
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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
-
- 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
- H02J3/12—Circuit arrangements for AC mains or AC distribution networks for adjusting voltage in AC networks by changing a characteristic of the network load
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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
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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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Abstract
The invention discloses a three-grade low-voltage power distribution network voltage control device and a control method thereof. The device comprises an integrated control system, a three-phase unbalance control device, a dynamic reactive compensating device and a line voltage adjusting device. The three-phase unbalance control device, the dynamic reactive compensating device and the line voltage adjusting device are successively connected in the line of the low-voltage power distribution network. The integrated control system performs coordinated unified control on each device, thereby performing voltage control on the low-voltage power distribution cabinet according to a three-step sequence of line voltage adjusting, three-phase unbalance control and dynamic reactive compensation. According to the control method of the three-grade low-voltage power distribution network voltage control device, first-step voltage adjustment, second-step three-phase unbalance control and third-step dynamic reactive compensation are successively performed according to data which are acquired by each device. The three-grade low-voltage power distribution network voltage control device can realize electric energy quality unified and comprehensive control on three-phase unbalance, low power factor, low end voltage, etc. Furthermore the three-grade low-voltage power distribution network voltage control device and the control method have advantages of simple control realization, high control effect, capability of suppressing resonance and preventing overregulation, etc.
Description
Technical field
The present invention relates to low-voltage distribution technical field, more particularly, to a kind of three-level formula low-voltage network voltage controlling device and
Its control method.
Background technology
With social development, mount inductive load in the customer charge of low-voltage network and just increase rapidly, due to distribution
Transformator (public area) generally existing threephase load is uneven, average load rate is low, open circuit loss is high, radius of electricity supply is big, last
The problems such as terminal voltage is of poor quality, along with the development of low-voltage network, low-voltage, low power factor and high loss problem are also progressively
Display, and be developing progressively as puzzlement low-voltage network one bottleneck problem of development.Therefore, the voltage matter of low-voltage network
Amount and saving energy and decreasing loss are administered and are just seemed and be even more important.
In current rural power grids voltage is administered, typically by platform area, three-phase imbalance device, reactive power compensator are installed
Deng equipment, voltage is administered, rural power grids low-voltage phenomenon has obtained larger improvement, the power supply quality in rural area has obtained significantly
The raising of degree.But, during current rural power grids are administered, the equipment such as three-phase imbalance device, reactive power compensator is all generally independent work
Make, that is, each equipment independently executes improvement, when a Ge Tai area adopts plurality of devices simultaneously, the parameter such as corresponding time of various equipment
Inharmonious, thus there is problems with：
(1) produce resonance：The generation of resonance overvoltage can work the mischief greatly to electrical network, such as causes voltage transformer to melt
Silk fusing, voltage transformer are burnt, grid equipment insulation is damaged etc., or even cause phase fault, protection device misoperation etc..
The generation of resonance not only can cause serious damage to electrical device and equipment, once and resonance occur, can only excise by force
Or could stop until certain device is damaged；
(2) cause toning：When rural power grids are by normally turning abnormal running mode, or improper turn normal operating mode
When, because distinct device is inconsistent for movement time, also can cause voltage toning or vibration so that the equipment such as reactive power compensator not
Disconnected carry out frequently switching, reduce the service life of equipment, cause power dissipation, being simultaneously continually changing of voltage, also can be to line
Road, load etc. impact, and equipment are caused be lost.
Content of the invention
The technical problem to be solved in the present invention is that：The technical problem existing for prior art, the present invention provides one
Kind structure is simple, electric energy regulation effect is good and can suppress resonance, avoid the three-level formula low-voltage network voltage of toning to administer dress
Put, and implementation method simple, be capable of that three-phase imbalance, power factor be low, the unification of the terminal voltage low quality of power supply is comprehensive
Close the control method administered.
For solving above-mentioned technical problem, technical scheme proposed by the present invention is：
A kind of three-level formula low-voltage network voltage controlling device, including centralized control system and respectively with described concentrate control
Three-phase imbalance controlling device, dynamic reactive compensation device and circuit regulator that system processed connects, described three-phase is uneven
Weighing apparatus controlling device, dynamic reactive compensation device and described circuit regulator are sequentially ingressed in the circuit of low-voltage network, institute
State centralized control system described three-phase imbalance controlling device, dynamic reactive compensation device and circuit regulator are assisted
Tune is uniformly controlled, with control according to circuit pressure regulation, three-phase imbalance administer and dynamic passive compensation three-level formula order to low
It is press-fitted electrical network execution voltage to administer.
Improvement further as apparatus of the present invention：Described centralized control system is specifically integrated in described three-phase imbalance and controls
In reason device, described centralized control system is passed through wirelessly to be connected with described dynamic reactive compensation device, circuit regulator.
Improvement further as apparatus of the present invention：Described three-phase imbalance controlling device is that the three-phase based on SVG is uneven
Weighing apparatus controlling device；Described three-phase imbalance controlling device also includes master controller, data acquisition unit, driver element and IGBT
Unit, described data acquisition unit gathers the three-phase current of institute's access power distribution network, is sent to described collection by described master controller
Middle control system；Described master controller receives the control instruction that described centralized control system sends, and controls described driver element to drive
Move described IGBT unit, to control three-phase current to reach poised state.
Improvement further as apparatus of the present invention：Described dynamic reactive compensation device include reactive compensation control system with
And respectively be connected with described reactive compensation control system the first collecting unit, capacitor bank units, the first wireless transmission unit,
Described reactive compensation control system gathers the voltage of institute's access power distribution network, electric current by described first collecting unit, and passes through institute
State the first wireless transmission unit and be sent to described centralized control system, and described reactive compensation control system passes through described first
Wireless transmission unit receives the control instruction that described centralized control system sends, and controls and puts into described capacitor bank units to carry out
Dynamic passive compensation.
Improvement further as apparatus of the present invention：Described circuit regulator includes automatic controller unit and difference
From described automatic controller unit connect the second collecting unit, have different voltage output gears voltage compensation transformator T,
Second wireless transmission unit, described automatic controller unit gathers the electricity of institute's access power distribution network by described second collecting unit
Pressure, and described centralized control system is transferred to by described second wireless transmission unit, and described automatic controller unit leads to
Cross described second wireless transmission unit and receive the control instruction that described centralized control system sends, control to adjust described voltage compensation
The voltage output gear of transformator T is to enter row line pressure regulation.
The present invention further provides the control method of above-mentioned three-level formula low-voltage network voltage controlling device it is characterised in that
Step includes：
1) data acquisition：Described three-phase imbalance controlling device gathers the three-phase current of institute's access power distribution network, and described
Dynamic reactive compensation device gathers the voltage of institute's access power distribution network, electric current, and the collection of described circuit regulator is accessed and joins
The voltage of electrical network；
2) first order voltage-regulation：Obtain the voltage of described circuit regulator collection, according to the shape of the voltage collecting
State judges whether to need to execute voltage-regulation, executes voltage-regulation if it is, controlling and starting described circuit regulator, return is held
Row step 1), otherwise proceed to execution step 3)；
3) second level three-phase imbalance is administered：Obtain the three-phase current of described three-phase imbalance controlling device collection, according to
The unbalanced state of the three-phase current collecting judges whether to need to execute three-phase imbalance improvement, if it is, control starting institute
State three-phase imbalance controlling device execution three-phase imbalance to administer, return execution step 1), otherwise proceed to execution step 4)；
4) third level dynamic passive compensation：Obtain voltage, the electric current of described dynamic reactive compensation device collection, according to collection
The voltage that arrives, the condition adjudgement of electric current, the need of execution dynamic passive compensation, are mended if it is, controlling and starting described dynamic reactive
Repay device execution reactive-load compensation；Return execution step 1), until exiting control.
As the improvement further of control method of the present invention, described step 2) concretely comprise the following steps：
2.1) obtain the voltage of described circuit regulator collection, and judge whether the voltage collecting exceedes voltage and preset
Value, if it is, proceed to execution step 2.2)；Otherwise described circuit regulator keeps current voltage output state, proceeds to execution
Step 3)；
2.2) judging currently whether reach preset duration, if it is, judging to need to execute voltage-regulation, proceeding to execution step
2.3)；Otherwise described circuit regulator keeps current voltage output state, proceeds to execution step 3)；
2.3) control and start described circuit regulator execution voltage-regulation, proceed to execution step 2.4)；
2.4) to described step 2.3) adjust after voltage verify, judge regulation after voltage whether exceed described voltage
Preset value, if it is, return execution step 2.3)；Otherwise complete voltage-regulation, return execution step 1).
As the improvement further of control method of the present invention, described step 3) concretely comprise the following steps：
3.1) obtain the three-phase current of described three-phase imbalance controlling device collection, calculate corresponding to described three-phase current
Tri-phase unbalance factor simultaneously judges whether to exceed default degree of unbalancedness threshold value, if it is, judging to need to execute three-phase imbalance improvement,
Proceed to execution step 3.2)；Otherwise proceed to execution step 4)；
3.2) control and start described three-phase imbalance controlling device execution three-phase imbalance improvement, proceed to execution step
3.3)；
3.3) three-phase current after the improvement of described 3.2) is verified, whether the three-phase current after judging to administer exceedes electricity
Stream preset value, if it is, return execution step 3.2)；Otherwise complete three-phase imbalance to administer, return execution step 1).
As the improvement further of control method of the present invention, described step 4) concretely comprise the following steps：
4.1) voltage, the electric current of described dynamic reactive compensation device collection are obtained, according to the voltage collecting, Current calculation
The power factor of circuit simultaneously judges whether to exceed power factor preset value, if it is, judging to need to execute reactive-load compensation, proceeding to and holding
Row step 4.2)；Otherwise return execution step 1)；
4.2) control and start described dynamic reactive compensation device execution dynamic passive compensation, proceed to execution step 4.3)；
4.3) to described step 4.2) power factor corresponding to circuit verifies after reactive-load compensation, judge whether to exceed
Described power factor preset value, if it is, return execution step 4.2)；Otherwise complete reactive-load compensation, return execution step 1).
As the improvement further of control method of the present invention, described step 1) also include dead electricity lost contact analyzing and processing step,
Concretely comprise the following steps：Described three-phase imbalance controlling device, dynamic reactive compensation device and circuit regulator collect data
When, the data according to being collected judges whether above-mentioned each device is in dead electricity or lost contact state, if it is, restarting corresponding dress
Put, otherwise proceed to execution step 2).
Compared with prior art, it is an advantage of the current invention that：
1) present invention passes through centralized control system to three-phase imbalance controlling device, dynamic reactive compensation device and circuit
Regulator coordinates and is uniformly controlled, and can give full play to the regulating power of each device, coordinates execution to distribution network line
Circuit pressure regulation, three-phase imbalance and dynamic passive compensation, realize circuit pressure regulation, three-phase imbalance and dynamic passive compensation
The quality of power supply unify comprehensive control；
2) coordinating and unifying based on centralized control system for the present invention controls, it can be avoided that three-phase imbalance controlling device, dynamic
State reactive power compensator and the action simultaneously of circuit regulator produce concussion, and by the centralized dispatching to each device, energy
Conflict between enough avoiding devices, thus effectively suppressing resonance, prevents resonance overvoltage, when resonance occurs, based on each device
Centralized Control can control timely adjustment systematic parameter, suppression resonance amplifies, and when resonance produces overvoltage, can control
Excision resonance trouble point in time；
3) present invention passes through centralized control system to three-phase imbalance controlling device, dynamic reactive compensation device and circuit
Regulator carries out first order voltage-regulation, second level three-phase imbalance is administered and the three-level formula of third level dynamic passive compensation
Voltage is administered, and is capable of that power distribution network three-phase imbalance, power factor be low, the low quality of power supply of terminal voltage unifies Synthetic
Reason, making the electric current in whole platform area administered, voltage, idle all tending to balance, thus farthest realizing energy-conservation and improvement
Quality of voltage；
4) present invention compared with, electric based on above-mentioned three-level formula in traditional resolution only in regulator back-end realization pressure regulation
Pressure is administered and can comprehensively be improved the quality of voltage of power distribution network whole piece circuit so that the voltage magnitude of circuit subcenter reaches unanimity
And have the lifting of certain amplitude；
5) present invention, compared with only compensating in simple set in traditional resolution, is administered based on above-mentioned three-level formula voltage
Line loss can be reduced by hoisting power factor to greatest extent, realize optimization and compensate；
6) present invention be based on three-level formula voltage administer, according to three-phase imbalance controlling device, dynamic reactive compensation device with
And each device action of Data Control that circuit regulator is collected, can be controlled based on the real time status of distribution network line
System is adjusted, and strong adaptability realizes the Automatic adjusument of power quality controlling in the power distribution network going for complicated electricity consumption condition.
Brief description
Fig. 1 is the structural representation of the present embodiment three-level formula low-voltage network voltage controlling device.
Fig. 2 is the structural representation of the present embodiment three-phase imbalance controlling device.
Fig. 3 is the structural representation of the present embodiment dynamic reactive compensation device.
Fig. 4 is the structural representation of the present embodiment circuit regulator.
Fig. 5 be the control method of the present embodiment three-level formula low-voltage network voltage controlling device realize schematic flow sheet.
Marginal data：1st, centralized control system；2nd, three-phase imbalance controlling device；3rd, dynamic reactive compensation device；4th, line
Road regulator.
Specific embodiment
Below in conjunction with Figure of description and concrete preferred embodiment, the invention will be further described, but not therefore and
Limit the scope of the invention.
As shown in figure 1, the present embodiment three-level formula low-voltage network voltage controlling device, including centralized control system 1 and
Three-phase imbalance controlling device 2, dynamic reactive compensation device 3 and the circuit pressure regulation dress being connected with centralized control system 1 respectively
Put 4, three-phase imbalance controlling device 2, dynamic reactive compensation device 3 and circuit regulator 4 are sequentially ingressed into low-voltage network
Circuit in, centralized control system 1 is to three-phase imbalance controlling device 2, dynamic reactive compensation device 3 and circuit regulator
4 coordinate and are uniformly controlled, and are administered according to circuit pressure regulation, three-phase imbalance and the three-level formula of dynamic passive compensation is suitable with controlling
Ordered pair low-voltage network execution voltage is administered.The present embodiment 10kV electrical network converts after high voltage isolator, distribution transformer
For 0.4kV power circuit, above-mentioned voltage controlling device is connected to distribution low-voltage platform area, and three-phase imbalance controlling device 2 passes through metering
Device TA1, TA2 connect to the low-pressure side of distribution transformer, and the low-pressure side of distribution transformer is sequentially ingressed into dynamically by circuit breaker Q F1
Reactive power compensator 3, circuit regulator 4, the outfan of circuit regulator 4 connects power supply user.
The present embodiment pass through centralized control system 1 to three-phase imbalance controlling device 2, dynamic reactive compensation device 3 and
Circuit regulator 4 coordinates and is uniformly controlled, and can give full play to the regulating power of each device, coordinates execution to power distribution network
The circuit pressure regulation of circuit, three-phase imbalance and dynamic passive compensation, realize circuit pressure regulation, three-phase imbalance and dynamic reactive
The quality of power supply compensating unifies comprehensive control；And the coordinating and unifying based on centralized control system 1 controls, it can be avoided that multiple device
Action simultaneously produces concussion, and by the centralized dispatching to each device, it can be avoided that the conflict between device, thus effectively pressing down
Resonance processed, prevents resonance overvoltage, and when resonance occurs, the centralized Control based on each device can adjust systematic parameter in time, suppression
Resonance processed amplifies, and when resonance produces overvoltage, can excise resonance trouble point in time.
In the present embodiment, centralized control system 1 is specifically integrated in three-phase imbalance controlling device 2, centralized control system 1
Pass through wirelessly to be connected with dynamic reactive compensation device 3, circuit regulator 4, based on wireless public network realize centralized control system 1 and
The data exchange of each device of far-end.The present embodiment centralized control system 1 specifically includes control module and wireless communication module, collection
Between middle control system 1 and dynamic reactive compensation device 3, circuit regulator 4, the communication protocol based on wireless communication module passes
Transmission of data, instruction, produce control instruction by control module and are transferred to each device by wireless communication module.
As shown in Fig. 2 three-phase imbalance controlling device 2 is the three-phase imbalance controlling device based on SVG in the present embodiment,
Three-phase imbalance controlling device 2 also includes master controller, data acquisition unit, driver element, IGBT unit and reactor L,
Data acquisition unit gathers the three-phase current of institute's access power distribution network, is sent to centralized control system 1 by master controller；Main control
Device receives the control instruction that centralized control system 1 sends, and controls driver element to drive IGBT unit, to control three-phase current to reach
Poised state.The present embodiment controls driving IGBT unit with specific reference to the three-phase current information of collection, by power circuit, inside
System three phase unbalance current is shifted, evenly distributes by storage capacitor, makes three-phase current reach poised state.By above-mentioned three-phase
Uneven controlling device 2 can automatically adjust, balance three-phase load, improve the exit potential of distribution transformer, and real-Time Compensation is no
Work(, that is, this device can be further compensate for idle raising power factor on the basis of solving the problems, such as three phase unbalance current.
As shown in figure 3, in the present embodiment dynamic reactive compensation device 3 include reactive compensation control system and respectively with no
First collecting unit of work(compensation control system connection, capacitor bank units N, the first wireless transmission unit, the control of reactive power compensating
System is passed through the first collecting unit and is gathered the voltage of institute's access power distribution network, electric current, and is sent to by the first wireless transmission unit
Centralized control system 1, and reactive compensation control system is by the first wireless transmission unit reception centralized control system 1 transmission
Control instruction, controls and puts into capacitor bank units N to carry out reactive-load compensation.The present embodiment is especially by switch control unit control
Cut-out or input capacitor bank units N, switch control unit FK1 includes the switching switch being connected in parallel and thyristor controlled series compensation,
Switch control unit is connected with 0.4KV distribution network line by circuit breaker Q F1.First collecting unit specifically includes current sensor
TA1 and voltmeter.By above-mentioned dynamic reactive compensation device, the zero transition procedue of electrical network and reactive power compensator can be detected
Condition, from running status and the System Reactive Power vacancy of motion tracking, analysis electrical network and reactive power compensator, need not discharge in capacitor
In the case of, select the corresponding capacitor bank of system zero transition procedue moment dynamic switching, make dynamic current and the voltage of electrical network
Aperiodic damping component close to zero, thus realizing zero transition procedue dynamic passive compensation.
As shown in figure 4, in the present embodiment circuit regulator 4 include automatic controller unit and respectively with automatically control
The second collecting unit that device unit connects, the voltage compensation transformator T with different voltage output gears, second it is wirelessly transferred list
Unit, automatic controller unit passes through the voltage that the second collecting unit gathers institute's access power distribution network, and is wirelessly transferred list by second
Unit is transferred to centralized control system 1, and automatic controller unit passes through the second wireless transmission unit and receives centralized control system 1
The control instruction sending, the voltage output gear of control and regulation voltage compensation transformator T is to carry out pressure regulation.The present embodiment circuit is adjusted
By voltage compensation transformator T as pressure regulation device, the two ends of voltage compensation transformator T are connected in parallel to by-pass switch to pressure device 4
KM1, the outfan of voltage compensation transformator T is connected with output switch KM2, by controlling by-pass switch KM1, output switch KM2,
Can control and access voltage compensation transformator T execution bypass two kinds of mode of operations of operation/pressure regulation.
When line voltage distribution Ui is low need start circuit regulator execution pressure regulation 2 when, control access output switch KM2,
Disconnect by-pass switch KM1, suitable offset voltage Δ U is produced by voltage compensation transformator T, output voltage Uo dynamic regulation is Uo
=Ui+ Δ U, so that terminal temperature difference voltage increase, meets normal electricity consumption and requires.In the present embodiment, by-pass switch KM1, output are opened
Close KM2 and be A.C. contactor, and be a switching device.
During above-mentioned voltage controlling device work, the three-phase of the accessed power distribution network of three-phase imbalance controlling device 2 Real-time Collection
Electric current is sent to centralized control system 1, dynamic reactive compensation device 3, the accessed power distribution network of circuit regulator 4 Real-time Collection
Voltage, electric current, the data collecting is uploaded to centralized control system 1 after encryption；Centralized control system 1 receives each device
The data sending simultaneously is decrypted, and produces corresponding control instruction according to the data that each device is collected, and after being encrypted
It is transferred to each device；Each device receives the data of centralized control system 1 transmission, obtains corresponding control instruction after deciphering,
Corresponding action is executed according to control instruction, realizes three-phase imbalance controlling device 2, dynamic reactive compensation device 3 and circuit
The coordination of regulator 4 controls.
As shown in figure 5, the control method of the present embodiment above-mentioned three-level formula low-voltage network voltage controlling device, step bag
Include：
1) data acquisition：Three-phase imbalance controlling device 2 gathers the three-phase current of institute's access power distribution network, and dynamic reactive
Compensation device 3 gathers the voltage that the voltage of institute's access power distribution network, electric current, and circuit regulator 4 gather institute's access power distribution network；
2) first order voltage-regulation：Obtain the voltage of circuit regulator 4 collection, sentenced according to the state of the voltage collecting
Break the need of execution voltage-regulation, if it is, control starting circuit regulator 4 execution voltage-regulation, return execution step
1), otherwise proceed to execution step 3)；
3) second level three-phase imbalance is administered：Obtain the three-phase current of three-phase imbalance controlling device 2 collection, according to collection
To the unbalanced state of three-phase current judge whether to need to execute three-phase imbalance and administer, if it is, control starting described three
Mutually uneven controlling device 2 execution three-phase imbalance is administered, and returns execution step 1), otherwise proceed to execution step 4)；
4) third level dynamic passive compensation：Obtain voltage, the electric current of dynamic reactive compensation device 3 collection, according to collecting
Voltage, electric current condition adjudgement the need of execution dynamic passive compensation, if it is, control start dynamic reactive compensation device
3 execution reactive-load compensations；Return execution step 1), until exiting control.
The present embodiment adopts said method, by centralized control system 1 to three-phase imbalance controlling device 2, dynamic reactive
Compensation device 3 and circuit regulator 4 carry out first order voltage-regulation, the improvement of second level three-phase imbalance and the third level and move
The three-level formula voltage of state reactive-load compensation is administered, and is capable of that power distribution network three-phase imbalance, power factor be low, terminal voltage is low,
Make the electric current in whole platform area administered, voltage, idle all tend to balance, thus farthest realizing energy-conservation and improving voltage
Quality；Compared with, the present embodiment is based on above-mentioned three-level formula voltage in traditional resolution only in regulator back-end realization pressure regulation
Administer, can comprehensively improve the quality of voltage of power distribution network whole piece circuit so that the voltage magnitude of circuit subcenter reaches unanimity
And have the lifting of certain amplitude；Compared with only compensating in simple set in traditional resolution, the present embodiment is based on above-mentioned
Three-level formula voltage is administered, and can reduce line loss by hoisting power factor to greatest extent, realize optimization and compensate.
The present embodiment above-mentioned three-level formula voltage is administered, according to three-phase imbalance controlling device 2, dynamic reactive compensation device 3
And each device action of Data Control that circuit regulator 4 is collected, can be entered based on the real time status of distribution network line
Row control and regulation, strong adaptability, realize the self adaptation of power quality controlling in the power distribution network going for complicated electricity consumption condition
Adjust.
In the present embodiment, step 2) concretely comprise the following steps：
2.1) obtain the voltage of circuit regulator 4 collection, and judge whether the voltage collecting exceedes voltage preset value,
If it is, i.e. voltage out-of-limit, proceed to execution step 2.2)；Otherwise circuit regulator 4 keeps current voltage output state, proceeds to
Execution step 3)；
2.2) judge currently whether reach preset duration, if it is, i.e. the out-of-limit time limit arrive, judge need execute voltage tune
Section, proceeds to execution step 2.3)；Otherwise circuit regulator 4 keeps current voltage output state, proceeds to execution step 3)；
2.3) control and start circuit regulator 4 execution voltage-regulation, proceed to execution step 2.4)；
2.4) to step 2.3) adjust after voltage verify, it is default whether the voltage after judging to adjust exceedes described voltage
Value, if it is, i.e. voltage out-of-limit, returns execution step 2.3)；Otherwise complete voltage-regulation, return execution step 1).
In the present embodiment, step 3) concretely comprise the following steps：
3.1) obtain the three-phase current of three-phase imbalance controlling device 2 collection, the three-phase corresponding to calculating three-phase current is not
Degree of balance simultaneously judges whether to exceed default degree of unbalancedness threshold value, if it is, i.e. tri-phase unbalance factor is out-of-limit, judges to need to execute three
Mutually uneven improvement, proceeds to execution step 3.2)；Otherwise proceed to execution step 4)；
3.2) control and start three-phase imbalance controlling device 2 execution three-phase imbalance improvement, proceed to execution step 3.3)；
3.3) to 3.2) administer after three-phase current verify, judge that whether to exceed electric current pre- for the three-phase current after improvement
If value, that is, electric current is out-of-limit, if it is, returning execution step 3.2)；Otherwise complete three-phase imbalance to administer, return execution step
1).
In the present embodiment, step 4) concretely comprise the following steps：
4.1) voltage, the electric current of dynamic reactive compensation device 3 collection are obtained, according to the voltage collecting, Current calculation line
The power factor on road simultaneously judges whether to exceed power factor preset value, if it is, judging to need to execute reactive-load compensation, proceeds to execution
Step 4.2)；Otherwise return execution step 1)；
4.2) control and start dynamic reactive compensation device 3 execution dynamic passive compensation, proceed to execution step 4.3)；
4.3) to step 4.2) power factor corresponding to circuit verifies after reactive-load compensation, judge whether to exceed power
Factor preset value, if it is, i.e. power factor is out-of-limit, returns execution step 4.2)；Otherwise complete reactive-load compensation, return and execute step
Rapid 1).
In the present embodiment, step 1) also include dead electricity lost contact analyzing and processing step, concretely comprise the following steps：Three-phase imbalance is administered
When device 2, dynamic reactive compensation device 3 and circuit regulator 4 collect data, according in the data judgement being collected
Stating whether each device is in dead electricity or lost contact state, if it is, restarting corresponding device, otherwise proceeding to execution step 2).
The present embodiment starts three-phase imbalance controlling device 2, dynamic reactive compensation device 3 and circuit regulator first
4 each devices；Dead electricity, lost contact analysis are carried out if it is determined that dead electricity, lost contact and default time limit by the data that each device collects
Arrive, then restart the device of dead electricity, lost contact；After the normal operation of each device, execute first order voltage-regulation：To circuit pressure regulation
The voltage that device 4 collects carries out voltage out-of-limit analysis, if voltage out-of-limit and reach pre- specified time, control circuit pressure regulation fills
Put 4 switching gears, otherwise control circuit regulator 4 keeps current gear；After the completion of first order voltage-regulation, execute the second level
Three-phase imbalance is administered：Under the premise of the gear of circuit regulator 4 keeps, three-phase imbalance controlling device 2 is collected
Three-phase current carries out the out-of-limit analysis of three-phase current, such as judges out-of-limit, then control three-phase imbalance controlling device 2 routinely parameter
Out-of-balance current is compensated, with rough balance three-phase current, Simultaneous Stabilization step down side three-phase voltage；Second level three-phase is not
After the completion of balance is administered, execute third level dynamic passive compensation：Sentenced according to the voltage of dynamic reactive compensation device 3 collection, electric current
Whether disconnected power factor is out-of-limit, if it is puts into dynamic reactive compensation device 3 and carries out reactive-load compensation.
The present embodiment three-phase imbalance controlling device 2, dynamic reactive compensation device 3 and circuit regulator 4 and concentration
When control system communication is normal, operated by the execution of above-mentioned control method is corresponding according to the control instruction receiving；Logical when occurring
During news fault, then enter contingency mode, start each device according to default response time and work independently.
Above-mentioned simply presently preferred embodiments of the present invention, not makees any pro forma restriction to the present invention.Although the present invention
Disclosed above with preferred embodiment, but it is not limited to the present invention.Therefore, every without departing from technical solution of the present invention
Content, according to the technology of the present invention essence to any simple modification made for any of the above embodiments, equivalent variations and modification, all should fall
In the range of technical solution of the present invention protection.
Claims (10)
1. a kind of three-level formula low-voltage network voltage controlling device is it is characterised in that include centralized control system (1) and difference
Three-phase imbalance controlling device (2), dynamic reactive compensation device (3) and the circuit being connected with described centralized control system (1)
Regulator (4), described three-phase imbalance controlling device (2), dynamic reactive compensation device (3) and described circuit regulator
(4) be sequentially ingressed in the circuit of low-voltage network, described centralized control system (1) to described three-phase imbalance controlling device (2),
Dynamic reactive compensation device (3) and circuit regulator (4) coordinate and are uniformly controlled, with control according to circuit pressure regulation, three
Mutually the three-level formula order of uneven improvement and dynamic passive compensation is administered to low-voltage network execution voltage.
2. three-level formula low-voltage network voltage controlling device according to claim 1 it is characterised in that：Described centralized Control
System (1) is specifically integrated in described three-phase imbalance controlling device (2), described centralized control system (1) and described dynamic nothing
Reactive power compensation installations (3), circuit regulator (4) pass through wireless connection.
3. three-level formula low-voltage network voltage controlling device according to claim 2 it is characterised in that：Described three-phase is uneven
Weighing apparatus controlling device (2) is the three-phase imbalance controlling device based on SVG；Described three-phase imbalance controlling device (2) also includes leading
Controller, data acquisition unit, driver element and IGBT unit, described data acquisition unit gathers the three of institute's access power distribution network
Phase current, is sent to described centralized control system (1) by described master controller；Described master controller receives described centralized Control
The control instruction that system (1) sends, controls described driver element to drive described IGBT unit, to control three-phase current to reach balance
State.
4. the three-level formula low-voltage network voltage controlling device according to claim 1 or 2 or 3 it is characterised in that：Described dynamic
State reactive power compensator (3) includes reactive compensation control system and be connected respectively first with described reactive compensation control system
Collecting unit, capacitor bank units, the first wireless transmission unit, it is single that described reactive compensation control system passes through described first collection
The voltage of collection institute of unit access power distribution network, electric current, and described centralized Control system is sent to by described first wireless transmission unit
System (1), and described reactive compensation control system is by the described first wireless transmission unit described centralized control system of reception (1)
The control instruction sending, controls and puts into described capacitor bank units to carry out dynamic passive compensation.
5. three-level formula low-voltage network voltage controlling device according to claim 4 it is characterised in that：Described circuit pressure regulation
Device (4) is included automatic controller unit and the second collecting unit being connected with described automatic controller unit respectively, has
The voltage compensation transformator T of different voltage output gears, the second wireless transmission unit, described automatic controller unit passes through described
Second collecting unit gathers the voltage of institute's access power distribution network, and is transferred to described concentration control by described second wireless transmission unit
System (1) processed, and described automatic controller unit is by the described second wireless transmission unit described centralized control system of reception
(1) control instruction sending, the voltage output gear controlling to adjust described voltage compensation transformator T is to enter row line pressure regulation.
6. utilize the control method of the three-level formula low-voltage network voltage controlling device described in any one in claim 1～5,
It is characterized in that step includes：
1) data acquisition：Described three-phase imbalance controlling device (2) gathers the three-phase current of institute's access power distribution network, and described dynamic
State reactive power compensator (3) gathers the voltage of institute's access power distribution network, electric current, and described circuit regulator (4) collection is connect
Enter the voltage of power distribution network；
2) first order voltage-regulation：Obtain the voltage that described circuit regulator (4) gathers, according to the state of the voltage collecting
Judge whether to need to execute voltage-regulation, execute voltage-regulation if it is, controlling and starting described circuit regulator (4), return
Execution step 1), otherwise proceed to execution step 3)；
3) second level three-phase imbalance is administered：Obtain the three-phase current that described three-phase imbalance controlling device (2) gathers, according to adopting
The unbalanced state of the three-phase current collecting judges whether to need to execute three-phase imbalance improvement, if it is, controlling startup described
Three-phase imbalance controlling device (2) execution three-phase imbalance is administered, and returns execution step 1), otherwise proceed to execution step 4)；
4) third level dynamic passive compensation：Obtain voltage, the electric current that described dynamic reactive compensation device (3) gathers, according to collection
The voltage that arrives, the condition adjudgement of electric current, the need of execution dynamic passive compensation, are mended if it is, controlling and starting described dynamic reactive
Repay device (3) execution reactive-load compensation；Return execution step 1), until exiting control.
7. control method according to claim 6 is it is characterised in that described step 2) concretely comprise the following steps：
2.1) obtain the voltage that described circuit regulator (4) gathers, and judge whether the voltage collecting exceedes voltage and preset
Value, if it is, proceed to execution step 2.2)；Otherwise described circuit regulator (4) keeps current voltage output state, proceeds to and holds
Row step 3)；
2.2) judging currently whether reach preset duration, if it is, judging to need to execute voltage-regulation, proceeding to execution step
2.3)；Otherwise described circuit regulator (4) keeps current voltage output state, proceeds to execution step 3)；
2.3) control and start described circuit regulator (4) execution voltage-regulation, proceed to execution step 2.4)；
2.4) to described step 2.3) adjust after voltage verify, it is default whether the voltage after judging to adjust exceedes described voltage
Value, if it is, return execution step 2.3)；Otherwise complete voltage-regulation, return execution step 1).
8. control method according to claim 7 is it is characterised in that described step 3) concretely comprise the following steps：
3.1) obtain the three-phase current that described three-phase imbalance controlling device (2) gathers, calculate corresponding to described three-phase current
Tri-phase unbalance factor simultaneously judges whether to exceed default degree of unbalancedness threshold value, if it is, judging to need to execute three-phase imbalance improvement,
Proceed to execution step 3.2)；Otherwise proceed to execution step 4)；
3.2) control and start described three-phase imbalance controlling device (2) execution three-phase imbalance improvement, proceed to execution step 3.3)；
3.3) three-phase current after the improvement of described 3.2) is verified, it is pre- whether the three-phase current after judging to administer exceedes electric current
If value, if it is, returning execution step 3.2)；Otherwise complete three-phase imbalance to administer, return execution step 1).
9. control method according to claim 8 is it is characterised in that described step 4) concretely comprise the following steps：
4.1) obtain voltage, the electric current that described dynamic reactive compensation device (3) gathers, according to the voltage collecting, Current calculation
The power factor of circuit simultaneously judges whether to exceed power factor preset value, if it is, judging to need to execute reactive-load compensation, proceeding to and holding
Row step 4.2)；Otherwise return execution step 1)；
4.2) control and start described dynamic reactive compensation device (3) execution dynamic passive compensation, proceed to execution step 4.3)；
4.3) to described step 4.2) power factor corresponding to circuit verifies after reactive-load compensation, judges whether to exceed described
Power factor preset value, if it is, return execution step 4.2)；Otherwise complete reactive-load compensation, return execution step 1).
10. the control method according to any one in claim 6～9 is it is characterised in that described step 1) also include losing
Electric lost contact analyzes and processes step, concretely comprises the following steps：Described three-phase imbalance controlling device (2), dynamic reactive compensation device (3) with
And circuit regulator (4) is when collecting data, the data according to being collected judge above-mentioned each device whether be in dead electricity or
Lost contact state, if it is, restarting corresponding device, otherwise proceeds to execution step 2).
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786634A (en) * | 2017-04-01 | 2017-05-31 | 北京智源新能电气科技有限公司 | A kind of static reacance generator and its multiple target capacity control method for coordinating |
| CN108321815A (en) * | 2018-03-08 | 2018-07-24 | 西安爱科赛博电气股份有限公司 | A kind of low-voltage network utility power quality control system and method |
| CN108365605A (en) * | 2018-03-08 | 2018-08-03 | 西安爱科赛博电气股份有限公司 | A kind of low-voltage network three-phase line low-voltage governing system and method |
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| CN109301846A (en) * | 2018-02-10 | 2019-02-01 | 新乡市中宝电气有限公司 | Unbalanced low voltage treatment device and method |
| CN111884238A (en) * | 2020-08-05 | 2020-11-03 | 西安西变组件有限公司 | A power quality control device for low-voltage distribution network |
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| CN114243733A (en) * | 2021-12-08 | 2022-03-25 | 国网福建省电力有限公司晋江市供电公司 | Three-phase voltage unbalance treatment device and method based on voltage dynamic compensation |
| CN114421488A (en) * | 2022-03-08 | 2022-04-29 | 广西电网有限责任公司贵港供电局 | Power distribution network low voltage treatment method based on edge calculation |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102231525A (en) * | 2011-06-28 | 2011-11-02 | 思源清能电气电子有限公司 | Voltage quality control (VQC) system based on static var generator(SVG) and method thereof |
| CN105406483A (en) * | 2015-12-18 | 2016-03-16 | 武汉世纪精能科技发展有限公司 | Low-voltage grid control system |
-
2016
- 2016-11-09 CN CN201610984819.5A patent/CN106385041A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102231525A (en) * | 2011-06-28 | 2011-11-02 | 思源清能电气电子有限公司 | Voltage quality control (VQC) system based on static var generator(SVG) and method thereof |
| CN105406483A (en) * | 2015-12-18 | 2016-03-16 | 武汉世纪精能科技发展有限公司 | Low-voltage grid control system |
Non-Patent Citations (4)
| Title |
|---|
| 周恒逸等: "基于SVG调节配变三相不平衡电流的应用研究", 《高压电器》 * |
| 周虎等: "电网三相不平衡下农网低电压治理的研究", 《电网与清洁能源》 * |
| 王元东等: "四级电压调控治理"低电压"", 《农村电气化》 * |
| 王金丽等: "配电网电能质量智能监控与治理仿真", 《电网技术》 * |
Cited By (14)
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|---|---|---|---|---|
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| CN109301846A (en) * | 2018-02-10 | 2019-02-01 | 新乡市中宝电气有限公司 | Unbalanced low voltage treatment device and method |
| CN108321815A (en) * | 2018-03-08 | 2018-07-24 | 西安爱科赛博电气股份有限公司 | A kind of low-voltage network utility power quality control system and method |
| CN108365605A (en) * | 2018-03-08 | 2018-08-03 | 西安爱科赛博电气股份有限公司 | A kind of low-voltage network three-phase line low-voltage governing system and method |
| CN109245130A (en) * | 2018-10-29 | 2019-01-18 | 上海大学 | A kind of system extending 35KV10KV substation radius of electricity supply |
| CN111884238A (en) * | 2020-08-05 | 2020-11-03 | 西安西变组件有限公司 | A power quality control device for low-voltage distribution network |
| CN112152237A (en) * | 2020-09-03 | 2020-12-29 | 国电南瑞科技股份有限公司 | Transformer area power quality management method and system based on multi-DFACTS device coordination control |
| CN112366716A (en) * | 2020-10-28 | 2021-02-12 | 广东电网有限责任公司韶关供电局 | Voltage balance system of low-voltage transformer area |
| CN112491061A (en) * | 2020-11-20 | 2021-03-12 | 国网安徽省电力有限公司黄山供电公司 | Line loss control method for distribution substation under seasonal load |
| CN113279947A (en) * | 2021-06-07 | 2021-08-20 | 哈尔滨硕诺科技有限公司 | Intelligent water pump energy-saving control system |
| CN113279947B (en) * | 2021-06-07 | 2021-10-26 | 哈尔滨硕诺科技有限公司 | Intelligent water pump energy-saving control system |
| CN114243733A (en) * | 2021-12-08 | 2022-03-25 | 国网福建省电力有限公司晋江市供电公司 | Three-phase voltage unbalance treatment device and method based on voltage dynamic compensation |
| CN114421488A (en) * | 2022-03-08 | 2022-04-29 | 广西电网有限责任公司贵港供电局 | Power distribution network low voltage treatment method based on edge calculation |
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