CN107425530A - A kind of high voltage converter and reactive-load compensation integration topological structure and method - Google Patents
A kind of high voltage converter and reactive-load compensation integration topological structure and method Download PDFInfo
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- CN107425530A CN107425530A CN201710699730.9A CN201710699730A CN107425530A CN 107425530 A CN107425530 A CN 107425530A CN 201710699730 A CN201710699730 A CN 201710699730A CN 107425530 A CN107425530 A CN 107425530A
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- Prior art keywords
- reactive
- load compensation
- high voltage
- voltage converter
- circuit breaker
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
- H02J3/1842—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein at least one reactive element is actively controlled by a bridge converter, e.g. active filters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
- H02J3/1864—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein the stepless control of reactive power is obtained by at least one reactive element connected in series with a semiconductor switch
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Ac-Ac Conversion (AREA)
- Inverter Devices (AREA)
Abstract
The present invention provides a kind of high voltage converter and reactive-load compensation integration topological structure and method, including high voltage converter, power circuit breaker QF1, motor breaking device QF2, reactive-load compensation circuit breaker Q F3, reactor L, input side current sensor CT1, input side voltage sensor PT1, outlet side current sensor CT2, outlet side voltage sensor PT2.It is used as reactive-load compensation in use, by the way of power network is directly powered to inverter input in high voltage converter, protects the safety of its inner member；And in reactive-load compensation, motor can freely depart from, and be independent of each other with reactive power compensator.Make multi-level concatenation high voltage converter can when needing motor motor, moreover it is possible to reactive-load compensation is carried out to power network when not needing motor, and ensures the safe and reliable of two application of function simultaneously.
Description
Technical field
The present invention relates to high-voltage frequency converter technology field, more particularly to a kind of high voltage converter and reactive-load compensation integration are opened up
Flutter structure and method.
Background technology
As the algorithmic technique of multi-level concatenation high voltage converter reaches its maturity, vast frequency conversion producer is all carrying out frequency conversion
Feature expand, to expand frequency conversion business.Due to the continuity of many multi-level concatenation high voltage converter motors
Not high, often in standby or inspecting state, this is motor for the very high multi-level concatenation high voltage converter of price
One greatly wastes.Because multi-level concatenation high voltage converter realizes two-way nothing plus some auxiliary equipment cans in itself
Work(compensation function, if so multi-level concatenation high voltage converter motor can be made when needing motor, it is not necessary to
Multi-level concatenation high voltage converter is carried out reactive-load compensation during motor, then can greatly improve the application effect of frequency converter
Rate.
The A of Publication No. CN 102946137 Chinese patent disclose it is a kind of based on high voltage converter bypass harmonic wave without
Work(compensating control method, and a kind of circuit topological structure is provided, high voltage converter forms shunt circuit with bypass, its mains side
Circuit breaker Q F1 and the circuit breaker Q F2 of motor side be arranged inside shunt circuit, its operation principle makes high-pressure frequency-conversion therein
Device is powered when carrying out reactive-load compensation work by motor side power supply is counter, is powered by the inversion circuit in frequency converter to frequency converter is counter,
And when carrying out reactive-load compensation, motor can not depart from compensation loop, and this anti-topological structure powered is not suitable for more level levels
The high voltage converter of connection type, easily IGBT therein is caused to damage, and this topological structure can not disengage in circuit
Motor.
The content of the invention
In order to solve problem described in background technology, the present invention provides a kind of high voltage converter and reactive-load compensation integration is opened up
Structure and method are flutterred, high voltage converter is used as reactive-load compensation in use, using power network directly to the side of inverter input power supply
Formula, protect the safety of its inner member；And in reactive-load compensation, motor can freely depart from, mutual with reactive power compensator
Do not influence.Make multi-level concatenation high voltage converter can when needing motor motor, moreover it is possible to need not drive
Reactive-load compensation is carried out during motor to power network, while two application of function of guarantee is safe and reliable.In order to achieve the above object, this
Invention is realized using following technical scheme：
A kind of high voltage converter and reactive-load compensation integration topological structure, including high voltage converter, power circuit breaker QF1,
Motor breaking device QF2, reactive-load compensation circuit breaker Q F3, reactor L, input side current sensor CT1, input side voltage sensor
PT1, outlet side current sensor CT2, outlet side voltage sensor PT2.
Described high voltage converter is multi-level concatenation high voltage converter, described reactive-load compensation circuit breaker Q F3 and electricity
Anti- device L is composed in series reactive-load compensation output loop, and it is connected to the input and output end of described high voltage converter, and described
High voltage converter form shunt circuit, described power circuit breaker QF1 is connected between power network and described shunt circuit, institute
The motor breaking device QF2 stated is connected between described shunt circuit and motor.
A kind of high voltage converter and reactive-load compensation integral method：
1) during standby mode, power circuit breaker QF1, motor breaking device QF2, reactive-load compensation circuit breaker Q F3 are in separating brake shape
State, wherein motor breaking device QF2 and reactive-load compensation circuit breaker Q F3 have interlocking；
2) during motor pattern, power circuit breaker QF1 closes a floodgate, and motor breaking device QF2 closes a floodgate, reactive-load compensation breaker
QF3 separating brakes, multi-level concatenation high voltage converter are run according to the control mode motor adjusted；
3) during reactive-load compensation pattern, power circuit breaker QF1 closes a floodgate, motor breaking device QF2 separating brakes, reactive-load compensation breaker
QF3 closes a floodgate, and the output of multi-level concatenation high voltage converter is connected to the grid, and proceeds by reactive-load compensation.
During reactive-load compensation pattern, user's circuit breaker Q F1 closes a floodgate, and described multi-level concatenation high voltage converter is by power network end
Directly power.
During reactive-load compensation pattern, reactive-load compensation circuit breaker Q F3 closes a floodgate, the output of described multi-level concatenation high voltage converter
The reactive-load compensation electric current at end is fed back to power network via QF3 and L composition reactive-load compensation output loops and compensated.
During reactive-load compensation pattern, motor breaking device QF2 separating brakes, and due to being used with motor breaking device QF2 interlocked, electricity
Machine can not be run, and motor drive mode can not work simultaneously with reactive-load compensation pattern, and motor driving and reactive-load compensation are independently
Operation, does not interfere with each other.
The control port of described high voltage converter is also associated with the idle benefit of needs sent from power network higher level control terminal
Repay the current signal of node, during reactive-load compensation pattern, user, which can provide power network higher level, needs the running current of candidate compensation buses
Signal, to realize closed loop no-power compensation function.
Compared with prior art, the beneficial effects of the invention are as follows：
1st, high voltage converter of the invention and reactive-load compensation integration topological structure and method, power circuit breaker QF1 is set
Put outside the shunt circuit of high voltage converter, as the total power switch of system, when high voltage converter is used as reactive-load compensation,
By power network directly to converter power supply loop power supply, without, to inverter supply, ensure that multi-level concatenation height by inverter side
The safety of IGBT elements inside voltage frequency changer.
2nd, high voltage converter of the invention and reactive-load compensation integration topological structure and method, motor breaking device QF2 is set
Put outside shunt circuit, when high voltage converter is used as reactive-load compensation, motor can freely depart from.
3rd, high voltage converter of the invention and reactive-load compensation integration topological structure and method, by reactive-load compensation breaker
The reactive-load compensation output loop that QF3 and reactor L is composed in series, when high voltage converter is used as reactive-load compensation, by high-pressure frequency-conversion
The input and output end of device connect, and are accessed by input in power network, make the idle benefit of high voltage converter output end
Repaying electric current can feed back in power network.
4th, high voltage converter of the invention and reactive-load compensation integration topological structure and method, due to multi-level concatenation height
IGBT pressure voltages inside voltage frequency changer are low, reactor L can prevent it is grid-connected it is flashy shove, protect frequency converter inside IGBT
It is without damage.
5th, high voltage converter of the invention and reactive-load compensation integration topological structure and method, during reactive-load compensation pattern, also
Power network higher level can be provided according to user needs the running current signal of candidate compensation buses, to realize closed loop reactive-load compensation work(
Energy.
Brief description of the drawings
Fig. 1 is a kind of high voltage converter and reactive-load compensation integration topological structure schematic diagram of the present invention；
Circuit signal when Fig. 2 is standby mode in a kind of high voltage converter and reactive-load compensation integral method of the invention
Figure；
Circuit when Fig. 3 is motor drive mode in a kind of high voltage converter and reactive-load compensation integral method of the invention
Schematic diagram；
Circuit when Fig. 4 is reactive-load compensation pattern in a kind of high voltage converter of the present invention and reactive-load compensation integral method shows
It is intended to；
Fig. 5 is a kind of more level cascading topological structures of multi-level concatenation high voltage converter provided in an embodiment of the present invention
Figure.
Embodiment
Embodiment provided by the invention is described in detail below in conjunction with accompanying drawing.
As shown in figure 1, a kind of high voltage converter and reactive-load compensation integration topological structure, including high voltage converter, power supply
Circuit breaker Q F1, motor breaking device QF2, reactive-load compensation circuit breaker Q F3, reactor L, input side current sensor CT1, input side
Voltage sensor PT1, outlet side current sensor CT2, outlet side voltage sensor PT2.
Described high voltage converter is multi-level concatenation high voltage converter, described reactive-load compensation circuit breaker Q F3 and electricity
Anti- device L is composed in series reactive-load compensation output loop, and it is connected to the input and output end of described high voltage converter, and described
High voltage converter form shunt circuit, described power circuit breaker QF1 is connected between power network and described shunt circuit, institute
The motor breaking device QF2 stated is connected between described shunt circuit and motor.
A kind of high voltage converter and reactive-load compensation integral method：
1) as shown in Fig. 2 during standby mode, power circuit breaker QF1, motor breaking device QF2, reactive-load compensation circuit breaker Q F3
In gate-dividing state, wherein motor breaking device QF2 and reactive-load compensation circuit breaker Q F3 have interlocking；
2) as shown in figure 3, during motor pattern, power circuit breaker QF1 closes a floodgate, and motor breaking device QF2 closes a floodgate, idle benefit
Circuit breaker Q F3 separating brakes are repaid, multi-level concatenation high voltage converter is run according to the control mode motor adjusted；
3) as shown in figure 4, during reactive-load compensation pattern, power circuit breaker QF1 closes a floodgate, motor breaking device QF2 separating brakes, idle benefit
Circuit breaker Q F3 combined floodgates are repaid, the output of multi-level concatenation high voltage converter is connected to the grid, and proceeds by reactive-load compensation.
During reactive-load compensation pattern, user's circuit breaker Q F1 closes a floodgate, and described multi-level concatenation high voltage converter is by power network end
Directly power.
During reactive-load compensation pattern, reactive-load compensation circuit breaker Q F3 closes a floodgate, the output of described multi-level concatenation high voltage converter
The reactive-load compensation electric current at end is fed back to power network via QF3 and L composition reactive-load compensation output loops and compensated.
During reactive-load compensation pattern, motor breaking device QF2 separating brakes, and due to being used with motor breaking device QF2 interlocked, electricity
Machine can not be run, and motor drive mode can not work simultaneously with reactive-load compensation pattern, and motor driving and reactive-load compensation are independently
Operation, does not interfere with each other.
The control port of described high voltage converter is also associated with the idle benefit of needs sent from power network higher level control terminal
Repay the current signal of node, during reactive-load compensation pattern, user, which can provide power network higher level, needs the running current of candidate compensation buses
Signal, to realize closed loop no-power compensation function.
The operation principle of topological structure of the present invention is：
1) high voltage power supply is obtained by power circuit breaker QF1, multi-level concatenation is switched by motor breaking device QF2
High voltage converter motor, entered by reactive-load compensation circuit breaker Q F3 to switch multi-level concatenation High Voltage Transducer Upon Wirenet
Row reactive-load compensation, grid-connected flashy shove is prevented by reactor L.
2) input side current sampling device CT1 samples for input current, input side voltage sampling apparatus PT1, for defeated
Enter voltage sample and lock phase.Outlet side current sampling device CT2 and output voltage sampling device PT2 is used for output current and output
The sampling of voltage, and then carry out motor control and no-power compensation function control.User, which can also provide power network higher level, needs idle benefit
The running current signal of node is repaid, to realize closed loop no-power compensation function.
In the handoff procedure of three of the above mode of operation, motor breaking device QF2 and reactive-load compensation circuit breaker Q F3 have interlocking,
Electrical interlocks and it is mechanical interlocked will do, fully ensure that system safety.
Described standby mode, it is the off working state of this topological structure.
Described motor pattern, it is the motor working condition of this topological structure.Can combined process use it is suitable
Drive pattern carry out motor driving.
Described reactive-load compensation pattern, it is the reactive-load compensation working condition of this topological structure.Enter this pattern before, it is necessary to
Multi-level concatenation high voltage converter input side chain phase is carried out, outlet side presses input side voltage output, the input and output voltage same period
Correct and grid-connected, ensure that the outlet side of multi-level concatenation high voltage converter is connected to the grid with the disturbance of minimum, start idle benefit
Repay.
As shown in figure 5, more level cascaded topology knots for a kind of multi-level concatenation high voltage converter provided by the invention
Structure implements illustration, and the master controller of the separate unit multi-level concatenation high voltage converter in figure includes master control borad, analog board, power supply
Plate, backboard and Fa Bo plates.Master control borad processing core control algolithm；Analog board reception current sampling device, voltage sampling apparatus
The voltage and current signal provided with user's superior node, it is converted into the accessible signal of master control borad；Power panel is each for providing
The power supply that board needs；The electricity and data transfer that backboard is used between each board；Send out ripple plate and multi-level concatenation high-pressure frequency-conversion
The power cell of device carries out data interaction by optical-fibre communications, to controlling and protecting power cell.
Above example is implemented under premised on technical solution of the present invention, gives detailed embodiment and tool
The operating process of body, but protection scope of the present invention is not limited to the above embodiments.Method therefor is such as without spy in above-described embodiment
It is conventional method not mentionlet alone bright.
Claims (6)
1. a kind of high voltage converter and reactive-load compensation integration topological structure, including high voltage converter, power circuit breaker QF1, electricity
Machine circuit breaker Q F2, reactive-load compensation circuit breaker Q F3, reactor L, input side current sensor CT1, input side voltage sensor
PT1, outlet side current sensor CT2, outlet side voltage sensor PT2；
Characterized in that, described high voltage converter is multi-level concatenation high voltage converter, described reactive-load compensation breaker
QF3 and reactor L is composed in series reactive-load compensation output loop, and it is connected to the input of described high voltage converter and output
End, shunt circuit is formed with described high voltage converter, described power circuit breaker QF1 is connected to power network and described in parallel time
Between road, described motor breaking device QF2 is connected between described shunt circuit and motor.
2. a kind of high voltage converter and reactive-load compensation integral method, it is characterised in that：
1) during standby mode, power circuit breaker QF1, motor breaking device QF2, reactive-load compensation circuit breaker Q F3 are in gate-dividing state, its
Middle motor breaking device QF2 and reactive-load compensation circuit breaker Q F3 have interlocking；
2) during motor pattern, power circuit breaker QF1 closes a floodgate, and motor breaking device QF2 closes a floodgate, F3 points of reactive-load compensation circuit breaker Q
Lock, multi-level concatenation high voltage converter are run according to the control mode motor adjusted；
3) during reactive-load compensation pattern, power circuit breaker QF1 is closed a floodgate, motor breaking device QF2 separating brakes, and reactive-load compensation circuit breaker Q F3 is closed
Lock, the output of multi-level concatenation high voltage converter are connected to the grid, and proceed by reactive-load compensation.
3. a kind of high voltage converter and reactive-load compensation integration topological structure and method according to claim 1-2, it is special
Sign is, during reactive-load compensation pattern, user's circuit breaker Q F1 closes a floodgate, and described multi-level concatenation high voltage converter is by power network end
Directly power.
4. a kind of high voltage converter and reactive-load compensation integration topological structure and method according to claim 1-2, it is special
Sign is, during reactive-load compensation pattern, reactive-load compensation circuit breaker Q F3 closes a floodgate, the output of described multi-level concatenation high voltage converter
The reactive-load compensation electric current at end is fed back to power network via QF3 and L composition reactive-load compensation output loops and compensated.
5. a kind of high voltage converter and reactive-load compensation integration topological structure and method according to claim 1-2, it is special
Sign is, during reactive-load compensation pattern, motor breaking device QF2 separating brakes, and due to motor breaking device QF2 interlocked use, electricity
Machine can not be run, and motor drive mode can not work simultaneously with reactive-load compensation pattern, and motor driving and reactive-load compensation are independently
Operation, does not interfere with each other.
6. a kind of high voltage converter and reactive-load compensation integration topological structure and method according to claim 1-2, it is special
Sign is that the control port of described high voltage converter is also associated with needing reactive-load compensation from what power network higher level control terminal was sent
The current signal of node, during reactive-load compensation pattern, user, which can provide power network higher level, needs the running current of candidate compensation buses to believe
Number, to realize closed loop no-power compensation function.
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| CN201710699730.9A CN107425530A (en) | 2017-08-16 | 2017-08-16 | A kind of high voltage converter and reactive-load compensation integration topological structure and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114256852A (en) * | 2021-12-22 | 2022-03-29 | 浙江芯能光伏科技股份有限公司 | Reactive compensation method for photovoltaic power station and photovoltaic power station |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102946137A (en) * | 2012-10-24 | 2013-02-27 | 国电南京自动化股份有限公司 | Harmonic wave reactive compensation control method based on high-voltage inverter bypass |
| CN204835554U (en) * | 2015-08-31 | 2015-12-02 | 张琦 | Device is synthesized to frequency conversion and electric energy quality |
| WO2016029831A1 (en) * | 2014-08-25 | 2016-03-03 | 国家电网公司 | Direct current voltage compensation method for parallel mixed-type multi-level converter |
| CN106602962A (en) * | 2017-02-07 | 2017-04-26 | 北京利德华福电气技术有限公司 | Power-variable frequency operation synchronization switching method based on high voltage frequency converter motor control system |
-
2017
- 2017-08-16 CN CN201710699730.9A patent/CN107425530A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102946137A (en) * | 2012-10-24 | 2013-02-27 | 国电南京自动化股份有限公司 | Harmonic wave reactive compensation control method based on high-voltage inverter bypass |
| WO2016029831A1 (en) * | 2014-08-25 | 2016-03-03 | 国家电网公司 | Direct current voltage compensation method for parallel mixed-type multi-level converter |
| CN204835554U (en) * | 2015-08-31 | 2015-12-02 | 张琦 | Device is synthesized to frequency conversion and electric energy quality |
| CN106602962A (en) * | 2017-02-07 | 2017-04-26 | 北京利德华福电气技术有限公司 | Power-variable frequency operation synchronization switching method based on high voltage frequency converter motor control system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114256852A (en) * | 2021-12-22 | 2022-03-29 | 浙江芯能光伏科技股份有限公司 | Reactive compensation method for photovoltaic power station and photovoltaic power station |
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Effective date of registration: 20210607 Address after: 312000 Economic Development Zone, Shangyu District, Shaoxing City, Zhejiang Province Applicant after: WOLONG ELECTRIC GROUP Co.,Ltd. Applicant after: WOLONG ELECTRIC GROUP LIAONING RONGXIN ELECTRIC TRANSMISSION Co.,Ltd. Address before: 114051 Anshan City, Liaoning, the East District of science and Technology Road No. 108 Applicant before: WOLONG ELECTRIC GROUP LIAONING RONGXIN ELECTRIC TRANSMISSION Co.,Ltd. |