CN109830967A - A kind of distribution is idle and Harmonic-wave compensation system and its control method - Google Patents
A kind of distribution is idle and Harmonic-wave compensation system and its control method Download PDFInfo
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
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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
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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
- Y02E40/40—Arrangements for reducing harmonics
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
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Abstract
It is idle with Harmonic-wave compensation system and its control method that the present invention relates to a kind of distributions, belongs to reactive power compensation technology field.Load harmonic and reactive power, compensation capacity waste and the high deficiency of system cost cannot in extremely rapid succession be fully compensated in order to solve existing compensation device at present, a kind of low cost, large capacity harmonic wave and reactive power compensation planning and quickly continuous distributed idle and Harmonic-wave compensation system and its control method are provided.A kind of distribution is idle and Harmonic-wave compensation system, including several compensating units, communication module and main website, it is communicated between each compensating unit and main website by communication module, the compensating unit is mainly used for the harmonic wave compensated needed for load is calculated and idle, automatic compensation harmonic and idle, the compensating unit switching of the main website real-time control difference node.
Description
Technical field
The present invention relates to a kind of idle with Harmonic-wave compensation system and its control method, specifically a kind of distribution is idle and
Harmonic-wave compensation system and its control method belong to reactive power compensation technology field.
Background technique
As power electronic equipment is widely used in industry and civilian occasion, such as oil exploitation drilling machine, rolling mill, electric arc
Furnace, electric railway and portal crane etc., a large amount of harmonic currents and reactive power cause grid voltage sags by injection power grid
And the problems such as low power factor.The presence of harmonic current and reactive power not only increases grid line loss in power grid, can also give
Some exigent precision equipments of power supply quality bring great harm, while can also bring to the safe and stable operation of power grid
Huge hidden danger.
At present the idle and harmonic compensation device of power distribution network mainly have fixed capacitor (Fastness Capacitor,
FC), thuristor throw-in and throw-off tuned filter (Thyristor Switched Filter, TSF), thyristor-controlled reactor
(Thyristor Controlled Reactor, TCR), Active Power Filter-APF (Active Power Filter, APF) and
Static reactive generator (Static Var Generator, SVG) etc..In these devices, FC, TSF and TCR etc. belong to passive
Compensation device is unable to Continuous Compensation load harmonic and reactive power, and the response speed of these devices is slower, is not able to satisfy
The dynamic response requirement of current power distribution network；APF and SVG etc. belong to active power compensator, although being capable of quick and continuous compensation load
Harmonic wave and reactive power, but due to the limitation of the process conditions such as power electronic devices pressure resistance and project cost, it is single to compensate
Power limited.
In recent years in order to compensate for Distribution Network Harmonics with it is idle, gradually developed Passively compensated device and active power compensator phase
In conjunction with mixed compensation device.At present the mixed compensation device of mainstream there are several types of:
(1) a kind of Distribution Static Compensator (Distribution-Level Static Reactive
Compensator, DSTATCOM) it is assisted with thyristor switchable capacitor (thyristor switched capacitor, TSC)
With the mixing reactive compensation system of operation.Wherein, DSTATCOM is to Continuous Compensation reduced-capacity load reactive power, TSC to
Grading compensation big capacity load reactive power.The mixing reactive compensation system is realized low by the combination of TSC and DSTATCOM
Cost, the continuous reactive power compensation of large capacity.But the mixing reactive compensation system can only compensating reactive power and cannot compensate negative
Carry harmonic wave；Simultaneously because the system only detects load current, cause dash current when TSC switching that cannot be eliminated and can flow into
Power grid.
(2) one kind by APF, thyristor-controlled reactor (Thyristor Controlled Reactor, TCR) and is consolidated
Determine the combined operation system of capacitor FC composition.Wherein, APF compensates load harmonic current, FC and TCR cooperation compensation load nothing
Function power.But due to fixed capacitor FC not dynamic switching, causes system to be unable to dynamically track and compensate the great Rong that vary
Amount load lagging reactive power.
(3) a kind of idle and harmonic wave mixing compensation system being made of separate unit SVG and more TSC.Wherein, TSC classification is mended
Load reactive power is repaid, SVG compensates remaining reactive power and all load harmonics.Since device only detects load current, cause
Dash current when TSC switching and it is grid-connected when specific subharmonic current can flow into power grid and cannot be compensated；Also, at certain
When platform TSC breaks down and does not put into or cut off, also result in TSC cannot with SVG cooperate and cannot be fully compensated load it is idle
Power.
(4) a kind of to mix benefit by static reactive generator with the idle and harmonic wave constituted with thuristor throw-in and throw-off tuned filter
Repay system.Wherein, thuristor throw-in and throw-off tuned filter compensation load reactive power, the remaining idle function of static reactive generator compensation
Rate and all load harmonics.Device detects three of the power grid between static reactive generator and thuristor throw-in and throw-off tuned filter group
Phase current realizes the Continuous Compensation to load harmonic and reactive power.But the device reactive compensation capacity is limited to thyristor
Switching tuned filter quantity, harmonic compensation capacity are limited to static reactive generator power.
Summary of the invention
It is an object of the invention to solve to have at present compensation device cannot in extremely rapid succession be fully compensated load harmonic with
Reactive power, compensation capacity waste and the high deficiency of system cost provide a kind of low cost, large capacity harmonic wave and reactive compensation
Ability and quickly continuous distributed idle and Harmonic-wave compensation system and its control method.
A kind of distribution of the invention is idle to be achieved through the following technical solutions with Harmonic-wave compensation system:
A kind of distribution is idle and Harmonic-wave compensation system, is characterized in that including several compensating units, communication module
And main website, it is communicated between each compensating unit and main website by communication module, the compensating unit is mainly used for being calculated
The harmonic wave and idle, automatic compensation harmonic that are compensated needed for load and idle, the compensation list of the main website real-time control difference node
First switching；
The communication module is wireless communication module or light communication module；
The compensating unit is mounted on the power grid between step down side and load, including is mounted on transformer low voltage
Side, real-time detection step down side three-phase voltage first voltage sensor, static reactive generator, thuristor throw-in and throw-off tune
Humorous filter group, controller are mounted on the first current sensor of load-side, real-time detection load-side three-phase current, described quiet
Only reacance generator be equipped with the second voltage sensor for detecting its DC bus-bar voltage and detect its export three-phase current the
Two current sensors, the static reactive generator and the thuristor throw-in and throw-off tuned filter group parallel connection access power grid, described
Controller includes harmonic detecting module, current tracking module, Pulse width modulation module, power tracking module；
The first voltage sensor, the first current sensor, second voltage sensor output end and harmonic detecting
The input terminal of module connects, and the output end of the second current sensor and the output end of harmonic detecting module are transported by a difference
It calculates, operation result is input to current tracking module, and the output end of current tracking module is Pulse width modulation module, pulse width
The output end of modulation module is static reactive generator, and another output end of harmonic detecting module is power tracking module, harmonic wave
Detection module output signal gives power tracking module, and the signal of power tracking module feedback gives harmonic detecting module, power tracking
The output end of module is thuristor throw-in and throw-off tuned filter；
The thuristor throw-in and throw-off tuned filter group includes more than one thuristor throw-in and throw-off tuned filter；
A kind of distribution is idle and the control method of Harmonic-wave compensation system, is characterized in that, comprising the following steps:
1) the current fundamental reactive current I of the current three-phase current of computational load sidesqWith current harmonic current Iah、 Ibh、
Ich: first voltage sensor obtains the three-phase voltage U of power grid in nearly step down side in real timea、Ub、 Uc, the first current sense
Device obtains the three-phase current I of load-side in real timea、Ib、Ic, second voltage sensor obtains the static reactive generator in real time
DC bus-bar voltage UdcThe current of the current three-phase current of load-side is calculated in the harmonic detecting module of input controller in real time
Fundamental reactive current IsqWith current harmonic current Iah、Ibh、Ich, the current harmonic current Iah、IbhAnd IchIn include idle function
Rate；
2) the part reactive power of compensation load: by the 1) step current fundamental reactive current I is calculatedsqIt is input to power
Tracking module, power tracking module calculate thuristor throw-in and throw-off according to the output electric current of each thuristor throw-in and throw-off tuned filter
The quantity of tuned filter；
By controlling the power driving circuit of thuristor throw-in and throw-off tuned filter, and make each thuristor throw-in and throw-off tuned filter
Obtain corresponding switching signal；Each thuristor throw-in and throw-off tuned filter carries out switching according still further to the switching signal respectively obtained, with
Compensate the part reactive power of load；
3) it calculates static reactive generator and compensates fundamental reactive current Iq: 1) current fundamental wave reactive power electricity that the is calculated
Flow IsqInput power tracking module, the power tracking module is by the current fundamental reactive current of the current three-phase current of load-side
IsqSubtract the sum of the current output electric current of thuristor throw-in and throw-off tuned filter group ITmAnd obtain static reactive generator compensation fundamental wave
Reactive current Iq, power tracking module is by ITmHarmonic detecting module is fed back to, static reactive generator compensates fundamental reactive current
IqWith current harmonic current Iah、Ibh、IchCodetermine the harmonic wave and idle of static reactive generator compensation output；
Wherein, the sum of current output electric current of thuristor throw-in and throw-off tuned filter group ITmIt is obtained by method shown in formula (I)
It arrives:
ITm=N6 π fcU/ [(2 π /)2lc-1] (I)
In formula (I), l indicates that the serial inductance of single thuristor throw-in and throw-off tuned filter, c indicate single thuristor throw-in and throw-off
The capacitance of tuned filter, U indicate the phase voltage of power grid, and f indicates the fundamental frequency of power grid, and N indicates the brilliant lock of investment power grid
Pipe switching tuned filter quantity；
4) the remaining reactive power and error of compensation load: by the current harmonic current I that 1) step obtainsah、 Ibh、IchMake
For the corresponding three-phase current I for subtracting static reactive generator and currently exporting of instruction currentGa、IGb、 IGc, thus obtain harmonic current
Error；The harmonic current error obtains institute after successively being handled via the current tracking module, Pulse width modulation module
The pulse width modulating signal of harmonic current error is stated, the power driving circuit of the static reactive generator is according to harmonic wave electricity
The three-phase current that the pulse width modulating signal of stream error exports static reactive generator is modulated, and thus Continuous Compensation is negative
The remaining reactive power and harmonic wave of load；
5) investment of compensating unit: the current three-phase voltage for the power grid that the communication module obtains foundation in grid side
(Ua、Ub、Uc), the current three-phase current (I of load-sidea、Ib、Ic) the idle and harmonic data that is calculated is transmitted to main website；It is main
It stands according to realtime power in region and harmonic wave situation, the compensating unit being remotely controlled in Input area, compensating unit is mended automatically after putting into
Repay harmonic wave in route and idle.
The present invention using several compensating units and main website composition mixing compensation system compensate jointly load harmonic with
Reactive power.By detecting the three-phase current of network load side, real-time computational load is idle and harmonic wave.By controlling respective numbers
Thuristor throw-in and throw-off tuned filter (TSF) put into power grid with grading compensation load needed for most of reactive power, and
Continuous Compensation is carried out to remaining load harmonic wave and reactive power by static reactive generator (SVG), improves the robustness of system
With control precision.Main website compensates single according to harmonic wave and idle situation, the compensating unit being remotely controlled in Input area in region simultaneously
Harmonic wave after member investment in automatic compensated line and idle.
The present invention devises a kind of low cost, large capacity harmonic wave and reactive power compensation planning and quickly continuously harmonic wave and nothing
The system of function compensation ability, so that load harmonic and idle function cannot be in extremely rapid succession fully compensated by solving existing compensation device
The problems such as rate, high compensation capacity waste and system cost.Compensating unit distribution installation simultaneously, can be empty in conjunction with existing equipment
Between installed, it is convenient and efficient.
Full digital control method can be used in controller of the invention, while compensating unit and master station communication are using wireless or light
Line communication mode, so that mixing compensation system still has good dynamic property and stable state essence when the load fluctuates violently
Degree.
Present invention combination static reactive generator (SVG) is to the rapidity of reactive compensation and successional advantage and brilliant lock
Pipe switching tuned filter (TSF) supplement large capacity harmonic wave and it is idle when low-cost advantage, provide a kind of large capacity without
The high performance-price ratio scheme of function and harmonic wave quick and continuous compensation has good economic results in society, suitable for pushing away in electric system
Wide to use, application field is extensive, is especially suitable for utilization in field of oil drilling.Current most of oil exploitation drilling machines are all to use
Diesel generating set provides power for drilling machine, can avoid harmonic wave to the added losses of generating set, largely using the method for the present invention
Diesel consumption is reduced, drilling cost is substantially reduced；It can effectively reduce noise pollution after access power grid, improve power quality, reduce
The system failure keeps drilling machine stable and reliable in work, energy-saving and emission-reduction.Moreover, mixing compensation system of the invention is mountable is moving
In dynamic bin, allows to easily as oil exploitation drilling machine shifts together, any pollution not will cause to the environment of surrounding
And destruction, safety and environmental protection.
Detailed description of the invention
Fig. 1: structural schematic diagram of the invention；
Fig. 2: Fig. 1 usage state diagram；
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art's every other implementation obtained under the premise of no creative work
Example, shall fall within the protection scope of the present invention.
Embodiment 1.A kind of distribution is idle and Harmonic-wave compensation system, as shown in Figs. 1-2, including it is several compensating units, logical
Module and main website are interrogated, is communicated between each compensating unit and main website by communication module, the compensating unit is mainly used for counting
The harmonic wave compensated needed for obtaining loading and idle, automatic compensation harmonic and idle are calculated, the main website real-time control difference node
Compensating unit switching；
The communication module is wireless communication module or light communication module；
The compensating unit is mounted on the power grid between step down side and load, including is mounted on transformer low voltage
Side, real-time detection step down side three-phase voltage first voltage sensor, static reactive generator, thuristor throw-in and throw-off tune
Humorous filter group, controller are mounted on the first current sensor of load-side, real-time detection load-side three-phase current, described quiet
Only reacance generator be equipped with the second voltage sensor for detecting its DC bus-bar voltage and detect its export three-phase current the
Two current sensors, the static reactive generator and the thuristor throw-in and throw-off tuned filter group parallel connection access power grid, described
Controller includes harmonic detecting module, current tracking module, Pulse width modulation module, power tracking module；
The first voltage sensor, the first current sensor, second voltage sensor output end and harmonic detecting
The input terminal of module connects, and the output end of the second current sensor and the output end of harmonic detecting module are transported by a difference
It calculates, operation result is input to current tracking module, and the output end of current tracking module is Pulse width modulation module, pulse width
The output end of modulation module is static reactive generator, and another output end of harmonic detecting module is power tracking module, harmonic wave
Detection module output signal gives power tracking module, and the signal of power tracking module feedback gives harmonic detecting module, power tracking
The output end of module is thuristor throw-in and throw-off tuned filter；
The thuristor throw-in and throw-off tuned filter group includes more than one thuristor throw-in and throw-off tuned filter；
A kind of distribution is idle and the control method of Harmonic-wave compensation system, the following steps are included:
1) the current fundamental reactive current I of the current three-phase current of computational load sidesqWith current harmonic current Iah、 Ibh、
Ich: first voltage sensor obtains the three-phase voltage U of power grid in nearly step down side in real timea、Ub、 Uc, the first current sense
Device obtains the three-phase current I of load-side in real timea、Ib、Ic, second voltage sensor obtains the static reactive generator in real time
DC bus-bar voltage UdcThe current of the current three-phase current of load-side is calculated in the harmonic detecting module of input controller in real time
Fundamental reactive current IsqWith current harmonic current Iah、Ibh、Ich, the current harmonic current Iah、IbhAnd IchIn include idle function
Rate；
2) the part reactive power of compensation load: by the 1) step current fundamental reactive current I is calculatedsqIt is input to power
Tracking module, power tracking module calculate thuristor throw-in and throw-off according to the output electric current of each thuristor throw-in and throw-off tuned filter
The quantity of tuned filter；
By controlling the power driving circuit of thuristor throw-in and throw-off tuned filter, and make each thuristor throw-in and throw-off tuned filter
Obtain corresponding switching signal；Each thuristor throw-in and throw-off tuned filter carries out switching according still further to the switching signal respectively obtained, with
Compensate the part reactive power of load；
3) it calculates static reactive generator and compensates fundamental reactive current Iq: 1) current fundamental wave reactive power electricity that the is calculated
Flow IsqInput power tracking module, the power tracking module is by the current fundamental reactive current of the current three-phase current of load-side
IsqSubtract the sum of the current output electric current of thuristor throw-in and throw-off tuned filter group ITmAnd obtain static reactive generator compensation fundamental wave
Reactive current Iq, power tracking module is by ITmHarmonic detecting module is fed back to, static reactive generator compensates fundamental reactive current
IqWith current harmonic current Iah、Ibh、IchCodetermine the harmonic wave and idle of static reactive generator compensation output；
Wherein, the sum of current output electric current of thuristor throw-in and throw-off tuned filter group ITmIt is obtained by method shown in formula (I)
It arrives:
ITm=N6 π fcU/ [(2 π f)2lc-1] (Ⅰ)
In formula (I), l indicates that the serial inductance of single thuristor throw-in and throw-off tuned filter, c indicate single thuristor throw-in and throw-off
The capacitance of tuned filter, U indicate the phase voltage of power grid, and f indicates the fundamental frequency of power grid, and N indicates the brilliant lock of investment power grid
Pipe switching tuned filter quantity；
4) the remaining reactive power and error of compensation load: by the current harmonic current I that 1) step obtainsah、Ibh、IchMake
For the corresponding three-phase current I for subtracting static reactive generator and currently exporting of instruction currentGa、IGb、 IGc, thus obtain harmonic current
Error；The harmonic current error obtains institute after successively being handled via the current tracking module, Pulse width modulation module
The pulse width modulating signal of harmonic current error is stated, the power driving circuit of the static reactive generator is according to harmonic wave electricity
The three-phase current that the pulse width modulating signal of stream error exports static reactive generator is modulated, and thus Continuous Compensation is negative
The remaining reactive power and harmonic wave of load；
5) investment of compensating unit: the current three-phase voltage for the power grid that the communication module obtains foundation in grid side
(Ua、Ub、Uc), the current three-phase current (I of load-sidea、Ib、Ic) the idle and harmonic data that is calculated is transmitted to main website；It is main
It stands according to realtime power in region and harmonic wave situation, the compensating unit being remotely controlled in Input area, compensating unit is mended automatically after putting into
Repay harmonic wave in route and idle.
The above described is only a preferred embodiment of the present invention, being not that the invention has other forms of limitations, appoint
What those skilled in the art changed or be modified as possibly also with the technology contents of the disclosure above equivalent variations etc.
Imitate embodiment.But without departing from the technical solutions of the present invention, according to the technical essence of the invention to above embodiments institute
Any simple modification, equivalent variations and the remodeling made, still fall within the protection scope of technical solution of the present invention.
Claims (7)
1. a kind of distribution is idle and Harmonic-wave compensation system, it is characterised in that: including several compensating units, communication module and master
It stands, is communicated between each compensating unit and main website by communication module, the compensating unit is mainly used for that load is calculated
The harmonic wave of required compensation and idle, automatic compensation harmonic and idle, the compensating unit throwing of the main website real-time control difference node
It cuts.
2. a kind of distribution is idle according to claim 1 and Harmonic-wave compensation system, it is characterised in that: the communication module is
Wireless communication module or light communication module.
3. a kind of distribution according to claim 1 or claim 2 is idle and Harmonic-wave compensation system, it is characterised in that: the compensation is single
Member is mounted on the power grid between step down side and load, including is mounted on step down side, real-time detection transformer
The first voltage sensor of the three-phase voltage of low-pressure side, static reactive generator, thuristor throw-in and throw-off tuned filter group, control
Device is mounted on the first current sensor of load-side, real-time detection load-side three-phase current, sets on the static reactive generator
There is the second voltage sensor for detecting its DC bus-bar voltage and detects its second current sensor for exporting three-phase current, it is described
Static reactive generator and the thuristor throw-in and throw-off tuned filter group parallel connection access power grid, and the controller includes harmonic detecting
Module, current tracking module, Pulse width modulation module, power tracking module.
4. a kind of distribution is idle according to claim 3 and Harmonic-wave compensation system, it is characterised in that: the first voltage passes
Sensor, the first current sensor, second voltage sensor output end connect with the input terminal of harmonic detecting module, second electricity
The output end of flow sensor and the output end of harmonic detecting module pass through a difference operation, and operation result is input to current tracking
Module, the output end of current tracking module are Pulse width modulation module, and the output end of Pulse width modulation module is static nothing
Function generator, another output end of harmonic detecting module are power tracking module, harmonic detecting module output signal to power with
Track module, the signal of power tracking module feedback give harmonic detecting module, and the output end of power tracking module is thuristor throw-in and throw-off
Tuned filter.
5. a kind of distribution is idle according to claim 3 and Harmonic-wave compensation system, it is characterised in that: the thuristor throw-in and throw-off
Tuned filter group includes more than one thuristor throw-in and throw-off tuned filter.
6. the idle control method with Harmonic-wave compensation system of -5 any distributions according to claim 1, which is characterized in that packet
Include following steps:
1) the current fundamental reactive current I of the current three-phase current of computational load sidesqWith current harmonic current Iah、Ibh、Ich: the
One voltage sensor obtains the three-phase voltage U of power grid in nearly step down side in real timea、Ub、Uc, the first current sensor is real-time
Obtain the three-phase current I of load-sidea、Ib、Ic, the direct current that second voltage sensor obtains the static reactive generator in real time is female
Line voltage UdcThe harmonic detecting module of input controller, be calculated in real time the current fundamental wave of the current three-phase current of load-side without
Function electric current IsqWith current harmonic current Iah、Ibh、Ich, the current harmonic current Iah、IbhAnd IchIn include reactive power；
2) the part reactive power of compensation load: by the 1) step current fundamental reactive current I is calculatedsqIt is input to power tracking
Module, power tracking module calculate thuristor throw-in and throw-off tuning according to the output electric current of each thuristor throw-in and throw-off tuned filter
The quantity of filter；
By controlling the power driving circuit of thuristor throw-in and throw-off tuned filter, and obtain each thuristor throw-in and throw-off tuned filter
Corresponding switching signal；Each thuristor throw-in and throw-off tuned filter carries out switching according still further to the switching signal respectively obtained, with compensation
The part reactive power of load；
3) it calculates static reactive generator and compensates fundamental reactive current Iq: 1) current fundamental reactive current I that is calculatedsq
Input power tracking module, the power tracking module is by the current fundamental reactive current I of the current three-phase current of load-sidesqSubtract
Remove the sum of the current output electric current of thuristor throw-in and throw-off tuned filter group ITmAnd obtain static reactive generator compensation fundamental wave reactive power
Electric current Iq, power tracking module is by ITmHarmonic detecting module is fed back to, static reactive generator compensates fundamental reactive current IqWith
Current harmonic current Iah、Ibh、IchCodetermine the harmonic wave and idle of static reactive generator compensation output；
4) the remaining reactive power and error of compensation load: by the current harmonic current I that 1) step obtainsah、Ibh、IchAs finger
Electric current correspondence is enabled to subtract the three-phase current I that static reactive generator currently exportsGa、IGb、IGc, thus obtain harmonic current error；
The harmonic current error obtains the harmonic wave after successively being handled via the current tracking module, Pulse width modulation module
The pulse width modulating signal of current error, the power driving circuit of the static reactive generator is according to the harmonic current error
Pulse width modulating signal three-phase current that static reactive generator is exported be modulated, thus Continuous Compensation load is surplus
Remaining reactive power and harmonic wave；
5) investment of compensating unit: the current three-phase voltage (U for the power grid that the communication module obtains foundation in grid sidea、Ub、
Uc), the current three-phase current (I of load-sidea、Ib、Ic) the idle and harmonic data that is calculated is transmitted to main website；Main website according to
Realtime power and harmonic wave situation in region, the compensating unit being remotely controlled in Input area, automatic compensated line after compensating unit is put into
In harmonic wave and idle.
7. the idle control method with Harmonic-wave compensation system of a kind of distribution according to claim 6, which is characterized in that described
In step 3): the sum of current output electric current of thuristor throw-in and throw-off tuned filter group ITmIt is obtained by method shown in formula (I):
ITm=N6 π fcU/ [(2 π f)2lc-1] (I)
In formula (I), l indicates that the serial inductance of single thuristor throw-in and throw-off tuned filter, c indicate single thuristor throw-in and throw-off tuning
The capacitance of filter, U indicate the phase voltage of power grid, and f indicates the fundamental frequency of power grid, and N indicates that the thyristor of investment power grid is thrown
Cut tuned filter quantity.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110572087A (en) * | 2019-09-04 | 2019-12-13 | 湖南匡楚科技有限公司 | motor device based on electric power harmonic state control |
| CN111799807A (en) * | 2020-06-17 | 2020-10-20 | 南方电网科学研究院有限责任公司 | Cooperative voltage control method and device for multiple reactive power compensation devices of direct current transmission system |
| CN117318058A (en) * | 2023-09-27 | 2023-12-29 | 南方电网数字电网研究院有限公司 | Reactive compensation method and reactive compensation system of power distribution network |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100001698A1 (en) * | 2008-07-02 | 2010-01-07 | American Superconductor Corporation | Static VAR Corrector |
| CN101741093A (en) * | 2010-03-11 | 2010-06-16 | 哈尔滨工业大学 | Reactive power compensation and harmonic governance system and control method for realizing power compensation and harmonic governance by using the same |
| CN102882219A (en) * | 2012-10-26 | 2013-01-16 | 株洲变流技术国家工程研究中心有限公司 | Railway power supply system comprehensive electric energy quality treatment device and method thereof |
| CN104362631A (en) * | 2014-11-06 | 2015-02-18 | 张文景 | Control method for high-power reactive and harmonic dynamic hybrid compensation system |
-
2018
- 2018-09-30 CN CN201811160165.XA patent/CN109830967A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100001698A1 (en) * | 2008-07-02 | 2010-01-07 | American Superconductor Corporation | Static VAR Corrector |
| CN101741093A (en) * | 2010-03-11 | 2010-06-16 | 哈尔滨工业大学 | Reactive power compensation and harmonic governance system and control method for realizing power compensation and harmonic governance by using the same |
| CN102882219A (en) * | 2012-10-26 | 2013-01-16 | 株洲变流技术国家工程研究中心有限公司 | Railway power supply system comprehensive electric energy quality treatment device and method thereof |
| CN104362631A (en) * | 2014-11-06 | 2015-02-18 | 张文景 | Control method for high-power reactive and harmonic dynamic hybrid compensation system |
Non-Patent Citations (1)
| Title |
|---|
| 彭劲杰 等: "新型连续无功补偿装置的设计与仿真", 《电 力 系 统 及 其 自 动 化 学 报》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110572087A (en) * | 2019-09-04 | 2019-12-13 | 湖南匡楚科技有限公司 | motor device based on electric power harmonic state control |
| CN111799807A (en) * | 2020-06-17 | 2020-10-20 | 南方电网科学研究院有限责任公司 | Cooperative voltage control method and device for multiple reactive power compensation devices of direct current transmission system |
| CN117318058A (en) * | 2023-09-27 | 2023-12-29 | 南方电网数字电网研究院有限公司 | Reactive compensation method and reactive compensation system of power distribution network |
| CN117318058B (en) * | 2023-09-27 | 2024-05-03 | 南方电网数字电网研究院股份有限公司 | Reactive compensation method and reactive compensation system of power distribution network |
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