CN109888777A - Multifucntional comprehensive distribution equipment - Google Patents
Multifucntional comprehensive distribution equipment Download PDFInfo
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- CN109888777A CN109888777A CN201910194727.0A CN201910194727A CN109888777A CN 109888777 A CN109888777 A CN 109888777A CN 201910194727 A CN201910194727 A CN 201910194727A CN 109888777 A CN109888777 A CN 109888777A
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- 230000005611 electricity Effects 0.000 claims description 4
- 238000011217 control strategy Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims 3
- 238000003908 quality control method Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 5
- 230000009466 transformation Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
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- 238000001914 filtration Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000011664 signaling Effects 0.000 description 2
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- 230000033228 biological regulation Effects 0.000 description 1
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- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
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- 208000014674 injury Diseases 0.000 description 1
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- 238000000465 moulding Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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- 230000001012 protector Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000004092 self-diagnosis Methods 0.000 description 1
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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
- 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 present invention relates to grid automation technical fields, in particular to a kind of Multifucntional comprehensive distribution equipment, including high-power more level cascade h-bridge converters, three-phase four-leg inverter and control module, high-power more level cascade h-bridge converters are used to for three-phase alternating current being converted into direct current, and three-phase four-leg inverter is used to inhibit the influence of three-phase load unbalance；Control module acquisition input side and the electric current of outlet side, voltage and output control signal after handling collected data.The present apparatus simplifies original system, greatly reduces project cost, improves functional reliability；Many additional functionalities such as power flowcontrol, utility power quality control can also be realized on the basis of realizing conventional func, control is flexible, new and effective, high quality power distribution network is constructed, so that power grid is obtained higher safety, economy, provides more effective control means for smart grid.
Description
Technical field
The present invention relates to grid automation technical field, in particular to a kind of Multifucntional comprehensive distribution equipment.
Background technique
Traditional power distribution network is generally being equipped with distribution transformer for radio area at present, for will exchange 10kv(or
35kv) voltage is converted to 380v supply user.As shown in figure 4, distribution transformer system is generally complex, in distribution transformer
High and low pressure side need to configure power switch, to cut off load or fault current；In order to guarantee the power quality of user, guarantee function
For rate factor in qualified range, power distribution station need to configure reactive power compensator, such as SVG；If harmonic content is exceeded, also need to match
Filter is set, such as active power filtering APF；In order to realize distribution network automated control, realize 4 distant functions (telemetering, remote signalling, remote control,
Remote regulating), also need configuration Distribution transformer TTU.Certainly configuration electric power metering device, such as the kilowatt-hour meter of massive quantity power supply and measurement etc. are also needed
Deng.Many devices are configured, system is on the one hand made to become cumbersome, is unfavorable for safeguarding, on the other hand also improves cost.
Summary of the invention
The purpose of the present invention is to provide a kind of Multifucntional comprehensive distribution equipments, improve big while functional reliability
Width reduces cost.
In order to achieve the above object, the technical solution adopted by the present invention are as follows: a kind of Multifucntional comprehensive distribution equipment, including
High-power more level cascade h-bridge converters, three-phase four-leg inverter and control module, high-power more level grades
Connection H bridge type current transformer is used to for three-phase alternating current being converted into direct current and its input side connection high-voltage fence, its output DC side
For DC bus in parallel, three-phase four-leg inverter is used to inhibit the influence of three-phase load unbalance and the connection of its input side is straight
Flow bus, its outlet side constitutes low-voltage alternating-current and exports user side；Control module acquires the electric current of input side and outlet side, voltage simultaneously
High-power more level cascade h-bridge converters are output control signals to after handling collected data realizes that current transformer is defeated
It the control of active power and reactive power and outputs control signals to three-phase four-leg inverter out and realizes flow of power direction
Control.
Compared with prior art, there are following technical effects by the present invention: the present apparatus simplifies original system, greatly reduces
Project cost improves functional reliability；In realization conventional electric power transformer, the voltage class transformation of reactive power compensator, electricity
Air bound is from can also realize power flowcontrol, utility power quality control etc. on the basis of the basic functions such as, energy transmission and reactive compensation
Many additional functionalities, control flexibly, construct new and effective, high quality power distribution network, power grid are made to obtain higher safety, economy
Property, more effective control means are provided for smart grid.
Detailed description of the invention
Fig. 1 is the principle of the present invention block diagram；
Fig. 2 is the circuit diagram of high-power more level cascade h-bridge converters in the present invention；
Fig. 3 is the circuit diagram of three-phase four-leg inverter in the present invention；
Fig. 4 is power distribution station typical wiring figure in the prior art.
Specific embodiment
Below with reference to Fig. 1 to Fig. 3, the present invention is described in further detail.
Refering to fig. 1, a kind of Multifucntional comprehensive distribution equipment, including high-power more level cascade h-bridge converters, three
Phase four-leg inverter and control module, high-power more level cascade h-bridge converters are used for three-phase alternating current
Being converted into direct current and its input side connection high-voltage fence, its output DC side is DC bus in parallel, and three-phase four-arm is inverse
It is defeated to become influence and its input side connection DC bus, its outlet side composition low-voltage alternating-current of the device for inhibiting three-phase load unbalance
User side out；Control module acquisition input side and the electric current of outlet side, voltage simultaneously export after handling collected data
Control signal to high-power more level cascade h-bridge converters realize current transformer active power of output and reactive power control,
And output control signals to the control that three-phase four-leg inverter realizes flow of power direction.With modern power electronics technology and
The development of industrial control technology, it is flexible that we can use the various converters of device for high-power power electronic composition
Realize that electric energy converts between various forms in ground.Using these technologies, we fill in which can be convenient in a set of combined power electrical power distribution
Set inner realization voltage transformation, reactive compensation, high current blocking, active power filtering and distribution network automated control function etc..It realizes high
Distribution network voltage conversion, the control of power quality of effect.It no longer needs to traditional transformer, reactive power compensator (SVG) etc..
This is the qualitative leap that power grid power transmission and transformation field technological progress is realized using modern power electronics technology.The present apparatus simplifies original
System greatly reduces project cost, improves functional reliability.Realizing conventional electric power transformer, reactive power compensator
Can also be realized on the basis of the basic functions such as voltage class transformation, electrical isolation, energy transmission and reactive compensation power flowcontrol,
Many additional functionalities such as utility power quality control, control flexibly, construct new and effective, high quality power distribution network, obtain power grid more
High safety, economy, provide more effective control means for smart grid.
The present apparatus has many advantages, such as: (1) small in size, light-weight, non-environmental-pollution；(2) user terminal can be kept when running
Voltage magnitude is constant, does not change with load；(3) it can guarantee that power end electric current, user terminal voltage are sinusoidal waveform, power factor
It is adjustable；(4) there is high controllability, source side, the voltage of user side or electric current are controllable, and power can two-way flow；(5) simultaneous
There is breaker function, device for high-power power electronic instantaneously (Microsecond grade) can turn off failure high current, multiple without being reconfigured
Miscellaneous protective relaying device；(6) active/reactive energy measurement of high-precision can be achieved in source side or user side, fills instead of metering
It sets；(7) comprehensive with device, there are DC links, so direct current and alternating current can be exported simultaneously, such as mix battery or other storages
After energy element, the reliability of power supply can be improved；(8) device contains intelligent control unit, may be implemented it is comprehensive with device itself from
The functions such as detection, self diagnosis, self-shield, self- recoverage, and can realize the connected network communication of the comprehensive state with device or control, it realizes remote
Journey AVC (voltage automatic control), for realizing that intelligent power network has positive effect.
Referring to Fig.2, in order to solve power electronic devices work in the application of high-power, present apparatus high-voltage fence
Input side uses high-power more level cascade h-bridge converters of PWM (pulse modulation technology) control, and described is high-power more
Level cascade h-bridge converter is made of 18 insulated gate bipolar transistor Q1 ~ Q18；Emitter, the transistor of transistor Q1
The collector of Q4 and the end Ua of high-voltage fence are connected；The emitter of transistor Q2, the collector of transistor Q5, transistor Q7
Emitter and the collector of transistor Q10 be connected；The emitter of transistor Q3, the collector of transistor Q6, transistor
The emitter of Q8, the collector of transistor Q11, the emitter of transistor Q13, transistor Q16 collector and high-voltage fence
The end Ub be connected；The emitter of transistor Q9, the collector of transistor Q12, transistor Q14 emitter and transistor
The collector of Q17 is connected；The end Uc of the emitter of transistor Q15, the collector of transistor Q18 and high-voltage fence is connected
It is logical；The collector of transistor Q1, Q2, Q3, Q7, Q8, Q9, Q13, Q14, Q15 are connected and the anode as DC bus, crystal
The emitter of pipe Q4, Q5, Q6, Q10, Q11, Q12, Q16, Q17, Q18 are connected and the cathode as DC bus；Control module
Be connected the on-off for controlling each transistor with the gate pole of transistor Q1 ~ Q18.The main feature of this circuit has two o'clock: (1) adapting to
The variation range of high-line input voltage；(2) the voltage and current stress for reducing component, uses the low-voltage power switch of low cost
And capacitor.Source side is essentially the rectification link of multiple power levels block coupled in series, and high-pressure side input voltage is divided equally each
In a module, so as to reduce the voltage born on the single power module in high-pressure side, output DC side is direct current in parallel
Bus.The link is the AC/DC current transformer that exchange is converted to direct current, the four quadrant running under PQ coordinate can be achieved in principle, both
Absorbable power grid capacitive reactive power, also can absorb power grid inductive reactive power, and active power is also bidirectional reversible.
Its control get up it is also very convenient, the control module is taken according to instantaneous power theory based on voltage oriented
Direct Power Control strategy or based on Virtual shipyard orientation direct Power Control strategy to high-power more level Cascade H bridge types
Current transformer is controlled as follows: the high-power more level cascade h-bridge converter output electric currents of (S1) control and power grid electricity
The flow direction of current transformer reactive power can be realized in generator rotor angle between pressure；(S2) high-power more level Cascade H bridge type unsteady flows are controlled
The flow direction of current transformer active power can be realized in the amplitude of device output electric current.I.e. by the output electric current of control current transformer
The control of current transformer active power of output and reactive power can be realized in vector.
Refering to Fig. 3, low-voltage alternating-current exports the three-phase four-arm formula inversion link that user side is PWM control, to inhibit three-phase negative
The unbalanced influence of lotus, the three-phase four-leg inverter include capacitor C, 8 insulated gate bipolar transistor Q19 ~ Q26,
Filter and inductance L, capacitor C are connected in parallel between the positive and negative anodes of DC bus；The collector and direct current of transistor Q19 ~ Q22 is female
The anode of line is connected, and the emitter of transistor Q23 ~ Q26 is connected with the cathode of DC bus；Emitter, the crystal of transistor Q19
The collector of pipe Q23 is connected and draws a branch to be grounded by inductance L；The collection of the emitter of transistor Q20, transistor Q24
The first input end of electrode and filter is connected, the collector and filter of the emitter of transistor Q21, transistor Q25
The second input terminal be connected, the third input terminal phase of the emitter of transistor Q22, the collector of transistor Q26 and filter
Even；The output end of filter is the output end of three-phase four-leg inverter；The gate pole phase of control module and transistor Q19 ~ Q26
It is used in conjunction in the on-off for controlling each transistor.Similarly, the control module is by exporting electric current to three-phase four-leg inverter
The control in flow of power direction may be implemented in the control of phase and amplitude, can by the requirement of customer charge side, realize constant voltage,
Constant idle or constant power factor power demands improve power quality.
Preferably, the working power of control module may be derived from DC bus, therefore in the present embodiment, including energy-storage travelling wave tube, storage
Energy element is connected for storing electric energy and providing electric energy for control module with the positive and negative anodes of DC bus.DC bus one is well matched small
Capacity energy storage components can be improved power supply reliability if with large capacity energy-storage travelling wave tube, and may participate in peak load regulation network, low Chu Gaofang,
Low ebb electricity price is enjoyed, economy is improved.
Preferably, the transistor Q1 ~ Q26 is insulated gate bipolar tran sistor.Control module can remotely or just
Comprehensive starting or shutting down with device is realized in ground operation, no longer needs in high-pressure side configuration isolation disconnecting link or to fall with high-voltage switch gear
Fall insurance；Control module is furnished with corresponding defencive function, such as quick over-voltage over-current protection, under-frequency over frequency protection simultaneously；Control
Molding block is furnished with various communication interfaces, realizes long-range four distant (telemetering, remote signalling, the remote control, remote regulating) functions with dispatching of power netwoks side；Cause
Transless isolation, to prevent injury of the high voltage to people, low-pressure side many places are configured with over-voltage protector, above functions and mould
Plate is all common technique, is just no longer elaborated here.
Claims (10)
1. a kind of Multifucntional comprehensive distribution equipment, it is characterised in that: including high-power more level cascade h-bridge converters,
Three-phase four-leg inverter and control module, high-power more level cascade h-bridge converters are used for three-phase alternating current
It is DC bus in parallel, three-phase four-arm that electricity, which is converted into direct current and its input side connection high-voltage fence, its output DC side,
Inverter is used to inhibit the influence of three-phase load unbalance and its input side connection DC bus, its outlet side constitute low-voltage alternating-current
Export user side；Control module acquisition input side and the electric current of outlet side, voltage and defeated after handling collected data
Control signal realizes the control of current transformer active power of output and reactive power to high-power more level cascade h-bridge converters out
Make and output control signals to the control that three-phase four-leg inverter realizes flow of power direction.
2. Multifucntional comprehensive distribution equipment as described in claim 1, it is characterised in that: high-power more level grades
Connection H bridge type current transformer is made of 18 insulated gate bipolar transistor Q1 ~ Q18.
3. Multifucntional comprehensive distribution equipment as claimed in claim 2, it is characterised in that: emitter, the crystalline substance of transistor Q1
The collector of body pipe Q4 and the end Ua of high-voltage fence are connected；The emitter of transistor Q2, the collector of transistor Q5, crystal
The emitter of pipe Q7 and the collector of transistor Q10 are connected；The emitter of transistor Q3, the collector of transistor Q6, crystalline substance
The emitter of body pipe Q8, the collector of transistor Q11, the emitter of transistor Q13, transistor Q16 collector and high pressure
The end Ub of power grid is connected；The emitter of transistor Q9, the collector of transistor Q12, transistor Q14 emitter and crystal
The collector of pipe Q17 is connected；The end Uc of the emitter of transistor Q15, the collector of transistor Q18 and high-voltage fence is connected
It is logical；The collector of transistor Q1, Q2, Q3, Q7, Q8, Q9, Q13, Q14, Q15 are connected and the anode as DC bus, crystal
The emitter of pipe Q4, Q5, Q6, Q10, Q11, Q12, Q16, Q17, Q18 are connected and the cathode as DC bus；Control module
Be connected the on-off for controlling each transistor with the gate pole of transistor Q1 ~ Q18.
4. Multifucntional comprehensive distribution equipment as claimed in claim 3, it is characterised in that: the three-phase four-arm inversion
Device includes that capacitor C, 8 insulated gate bipolar transistor Q19 ~ Q26, filter and inductance L, capacitor C are connected in parallel on DC bus
Positive and negative anodes between.
5. Multifucntional comprehensive distribution equipment as claimed in claim 4, it is characterised in that: the current collection of transistor Q19 ~ Q22
Pole is connected with the anode of DC bus, and the emitter of transistor Q23 ~ Q26 is connected with the cathode of DC bus；Transistor Q19's
Emitter, transistor Q23 collector be connected and draw a branch and be grounded by inductance L；Emitter, the crystalline substance of transistor Q20
The first input end of the collector of body pipe Q24 and filter is connected, the collector of the emitter of transistor Q21, transistor Q25
And the second input terminal of filter is connected, the of the emitter of transistor Q22, the collector of transistor Q26 and filter
Three input terminals are connected；The output end of filter is the output end of three-phase four-leg inverter；Control module and transistor Q19 ~
The gate pole of Q26 is connected the on-off for controlling each transistor.
6. Multifucntional comprehensive distribution equipment as claimed in claim 5, it is characterised in that: the control module takes root
According to the Direct Power control based on voltage oriented direct Power Control strategy or based on Virtual shipyard orientation of instantaneous power theory
System strategy is to high-power more level cascade h-bridge converters by controlling.
7. Multifucntional comprehensive distribution equipment as claimed in claim 6, it is characterised in that: the control module is to big function
The more level cascade h-bridge converters of rate are controlled as follows:
(S1) unsteady flow can be realized in the generator rotor angle controlled between high-power more level cascade h-bridge converter output electric currents and network voltage
The flow direction of device reactive power；
(S2) current transformer active power can be realized in the amplitude for controlling high-power more level cascade h-bridge converter output electric currents
Flow direction.
8. Multifucntional comprehensive distribution equipment as claimed in claim 7, it is characterised in that: the control module by pair
The control in flow of power direction may be implemented in the control of three-phase four-leg inverter output current phase and amplitude.
9. Multifucntional comprehensive distribution equipment as claimed in claim 8, it is characterised in that: including energy-storage travelling wave tube, energy storage member
Part is connected for storing electric energy and providing electric energy for control module with the positive and negative anodes of DC bus.
10. Multifucntional comprehensive distribution equipment as claimed in claim 9, it is characterised in that: the transistor Q1 ~ Q26
It is insulated gate bipolar tran sistor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910194727.0A CN109888777B (en) | 2019-03-14 | 2019-03-14 | Multifunctional comprehensive power distribution device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910194727.0A CN109888777B (en) | 2019-03-14 | 2019-03-14 | Multifunctional comprehensive power distribution device |
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| CN109888777B CN109888777B (en) | 2024-02-20 |
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