CN110535175A - It is applied to the constant-power control method and system of the micro-source inverter of micro-capacitance sensor - Google Patents
It is applied to the constant-power control method and system of the micro-source inverter of micro-capacitance sensor Download PDFInfo
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- CN110535175A CN110535175A CN201910772918.0A CN201910772918A CN110535175A CN 110535175 A CN110535175 A CN 110535175A CN 201910772918 A CN201910772918 A CN 201910772918A CN 110535175 A CN110535175 A CN 110535175A
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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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
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Abstract
The present disclosure proposes the constant-power control method for the micro-source inverter for being applied to micro-capacitance sensor and systems, acquire the output of inverter to the voltage and current signal of bus, carry out Park Transformation and obtain voltage vod, voq, electric current iLd, iLq；It is poor that the current value and iLd that active reference value and vod are obtained after being divided by are made, and is input to electric current monocycle controller and is adjusted, the watt current after being adjusted；It is poor that the current value and iLq that idle reference value and voltage voq are obtained after being divided by are made, and is input to electric current monocycle controller and is adjusted, the reactive current after being adjusted；It is control signal after signal modulation SPWM by the signal obtained after the watt current and reactive current progress Parker inverse transformation after adjusting；Control signal exports to inverter the control for realizing switch tube, and the power for exporting micro battery inverter is consistent with value and power reference.The disclosure preferably keeps system voltage and frequency is maintained at rated value and is nearby fluctuated with small deviation.
Description
Technical field
This disclosure relates to distribution network technology field, more particularly to the invariable power control for the micro-source inverter for being applied to micro-capacitance sensor
Method and system processed.
Background technique
With the development of electric power network technique, currently, including a variety of micro batteries in power distribution network, reapective features are different, and power generation is former
Reason is different.If using the wind resource feature naturally complementary in time with sunlight resource, by wind-power electricity generation and photovoltaic power generation
Simultaneously in input coefficient, interval when independent power supply can be naturally made up, and then it is a degree of reliable to have system naturally
Power supply performance.
The storage for being stored with battery and super capacitor progress energy of energy in micro-capacitance sensor, when carrying out the configuration of energy
It is used after needing to realize microgrid inverter the energy progress inversion by storage, currently, the energy stored for super capacitor
How to control is the technical issues that need to address.
Summary of the invention
The purpose of this specification embodiment is to provide the constant-power control method for being applied to the micro-source inverter of micro-capacitance sensor,
The power for exporting micro battery is consistent with value and power reference.
This specification embodiment provides the constant-power control method for being applied to the micro-source inverter of micro-capacitance sensor, by following
Technical solution is realized:
Include:
The output of inverter is acquired to the voltage and current signal of bus, Park Transformation is carried out and obtains voltage vod, voq, electricity
Flow iLd, iLq；
It is poor that the current value and iLd that active reference value and vod are obtained after being divided by are made, and is input to electric current monocycle controller and is adjusted
Section, the watt current after being adjusted；
It is poor that the current value and iLq that idle reference value and voltage voq are obtained after being divided by are made, be input to electric current monocycle controller into
Row is adjusted, the reactive current after being adjusted；
By the signal obtained after the watt current and reactive current progress Parker inverse transformation after adjusting by signal modulation
It is control signal after SPWM；
Control signal exports to inverter the control for realizing switch tube, the power and power for exporting micro battery inverter
Reference value is consistent.
This specification embodiment provides the power limitation control system for being applied to the micro-source inverter of micro-capacitance sensor, by following
Technical solution is realized:
Include:
Voltage current transformation module, is configured as: acquiring the output of inverter to the voltage and current signal of bus, carries out
Park Transformation obtains voltage vod, voq, electric current iLd, iLq；
Watt current adjustment module, is configured as: it is poor that the current value and iLd that active reference value obtains after being divided by with vod are made,
It is input to electric current monocycle controller to be adjusted, the watt current after being adjusted；
Reactive current adjustment module, is configured as: the current value and iLq that idle reference value obtains after being divided by with voltage voq
It is poor to make, and is input to electric current monocycle controller and is adjusted, the reactive current after being adjusted；
Signal adjusting module is configured as: will be obtained after the watt current and reactive current progress Parker inverse transformation after adjusting
The signal obtained is control signal after signal modulation SPWM；
Control signal exports to inverter the control for realizing switch tube, the power and power for exporting micro battery inverter
Reference value is consistent.
Compared with prior art, the beneficial effect of the disclosure is:
For the disclosure for supercapacitor, capacity is small, if the power of abrupt release is compared with may well reach under its capacity
Limit, therefore support system voltage and frequency can not be used to, power limitation control mode can be used to its inverter, make to control super
The power command value of capacitor is equal to performance number obtained in capacity configuration calculating process.
When relatively high power difference occurs in system, the presence of supercapacitor can optimize accumulator charging/discharging process, keep away
The frequent charge and discharge of battery-free, and can be better maintained system voltage and frequency is maintained at rated value nearby with small deviation
Fluctuation.
Detailed description of the invention
The Figure of description for constituting a part of this disclosure is used to provide further understanding of the disclosure, and the disclosure is shown
Meaning property embodiment and its explanation do not constitute the improper restriction to the disclosure for explaining the disclosure.
Fig. 1 is the three-phase voltage-type inverter main circuit diagram of embodiment of the present disclosure；
Fig. 2 is the PQ control principle drawing of embodiment of the present disclosure；
Fig. 3 is the iLd control structure block diagram of embodiment of the present disclosure；
Fig. 4 is that the electric current loop open loop of embodiment of the present disclosure passes letter Bode figure；
Fig. 5 (a) is the active and reactive power figure that micro- source of embodiment of the present disclosure exports；
Fig. 5 (b) is a phase busbar voltage and frequency, current waveform figure of embodiment of the present disclosure.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the disclosure.Unless another
It indicates, all technical and scientific terms used herein has usual with disclosure person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the disclosure.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
The disclosure uses power limitation control mode to supercapacitor interface inverter, and is discussed in detail value and power reference
Acquisition modes.Then networking dynamic simulation and analysis are carried out, simulation results show the validity of model and control strategy.
Examples of implementation one
Interface inverter of the three-phase voltage-type inverter as micro- source.Its main circuit is as shown in Figure 1.In Fig. 1, VDC is straight
Side input voltage source is flowed, the port output voltage of all kinds of micro batteries is represented；Lf and Cf constitutes LC filter；Z is load；vA,vB,
VC is the bridge arm mid-point voltage of inverter；Voa, vob, voc are output voltage of the inverter after filtering, namely are load electricity
Pressure；ILa, iLb, iLc are the electric current for flowing through filter inductance；ICa, iCb, iCc are the electric current for flowing through filter capacitor；ioa,iob,
Ioc is the output electric current after filtering.
Referring to shown in attached drawing 2, power limitation control mode can be described as PQ control mode again, and main target is to keep micro battery defeated
Power out is consistent with value and power reference.It is commonly available to micro-capacitance sensor to be incorporated into the power networks with bulk power grid, or can be provided by other micro- sources
The case where voltage and the independent operating of frequency support, need to only control the output work of the i.e. adjustable micro battery of output electric current of inversion
Rate exports it according to reference power instruction value.Therefore, it need to only design an electric current monocycle controller and adjust active and idle electricity
Stream.
Overall technology design is: acquiring the output of inverter to the voltage and current signal of bus, carries out Park Transformation and obtain
Obtain voltage vod,voq, vod,voqFor the d-q axis instantaneous voltage obtained after Park Transformation, electric current iLd, iLq, iLd, iLqTo flow through filtering
The dq shaft current component of inductance, current reference value that active reference value and vod are obtained after being divided by simultaneously are made poor with iLd, are input to electricity
Stream monocycle controller is adjusted, the watt current after being adjusted.Electric current loop: three-phase instantaneous value electric current becomes after Park Transformation
At dq axis component, then it is compared with the reference signal of power controller output, and PI control is carried out to error.Herein because
It realizes the accurate control to power, therefore uses pi regulator.
It is poor that the current value and iLq that idle reference value and voltage voq are obtained after being divided by are made, be input to electric current monocycle controller into
Row is adjusted, the reactive current after being adjusted, and will be obtained after the watt current and reactive current progress Parker inverse transformation after adjusting
Information control signal after signal modulation SPWM for 6 tunnels, it is to the signal that dq axis output voltage component is controlled, this is straight
The anti-Park Transformation of modulated signal is flowed, three-phase alternating current modulated signal can be obtained, be divided into six tunnels.Output to inverter is realized to switch
The control of pipe, the power for exporting micro battery are consistent with value and power reference.
Assuming that the d axis in two-phase rotating coordinate system is overlapped with busbar voltage vector vod, then busbar voltage vector q axis point
Measuring voq is 0, ignores the electric current flowed through on filter capacitor, inverter output power is represented by
P=vodiLd
Q=-vodiLq (1)
Vod in formula (1) is constant, it can thus be concluded that the dq axis reference value of electric current loop is
iLdref=Pref/vod
iLqref=Qref/vod (2)
Electric current monocycle, which will be realized, accurately controls power, therefore uses pi regulator.Provide iLdControl structure block diagram as scheme
3。
The voltage of the micro-source inverter output of PQ control mode is determined by micro- source of bulk power grid or offer voltage and frequency support
It is fixed, the output power of the i.e. adjustable micro battery of output electric current of inversion need to be only controlled, exports it according to reference power instruction value.
Therefore, it need to only design an electric current monocycle controller and adjust active and reactive current.
Electric current loop: three-phase instantaneous value electric current becomes dq axis component after Park Transformation, then exports with power controller
Reference signal is compared, and carries out PI control to error, because to realize the accurate control to power, therefore PI is used to adjust
Device.
Simultaneously: compared with capacitance current ring, using inductive current ring, system stability is slightly higher.Therefore it is electric in PQ control system
It flows ring and uses filter inductance current feedback.
In figure, LfFilter inductance is represented, Kpi is the proportionality coefficient of PI controller；Kii is integral coefficient.Ignore vod's
Disturbance, merges small inertia time constant, enables TII=Ti+0.5Ts, and the electric current loop open loop for obtaining iLd passes letter and is
LfFilter inductance is represented, Kpi is the proportionality coefficient of PI controller；Kii is integral coefficient.Ignore the disturbance of vod,
Merge small inertia time constant, enables TII=Ti+0.5Ts, KPWMFor PWM link equieffective ratio coefficient.
It is designed into II type system, it is as follows that PQ control electric current loop pi regulator parameter may finally be obtained
Using parameter listed by table 1, Kpi=0.0428, Kii=122.45 can be obtained.Electric current loop open loop passes letter amplitude-frequency characteristic
Bode figure is as shown in Figure 4.
1 main circuit parameter of table and control system time constant
From fig. 4, it can be seen that at this time system Phase margin be 41.1 °, therefore designed controller parameter can make be
System is stablized.
Examples of implementation two
Power limitation control operation emulation: emulation operating condition introduction: simulation time 1s；The 0-0.4s period, it is desirable that micro- source is defeated
Active power 10kW out, 0.4-1s require micro- source active power of output 6.7kW；0-0.6s, it is desirable that micro- source not output reactive power,
0.6-1s requires micro- source output reactive power 5kvar.Current controller proportional gain takes Kpi=0.0428, and integral gain takes Kii
=122.45.Shown in simulation result such as Fig. 5 (a)-Fig. 5 (b).
By observing Fig. 5 (a) it is found that the micro battery using power limitation control then can follow power command value to change accordingly
Itself output；By 5 (b) it is found that system busbar voltage and frequency are because there is bulk power grid to support, not by the wave of micro-capacitance sensor output power
Dynamic and change, it is constant to be maintained at rated value, current phase then before 0.6s with voltage in phase, according to idle after 0.6s
The change of instruction and phase offset occurs.Thus the correctness that power limitation control mode designs is demonstrated.
Examples of implementation three
This specification embodiment provides the power limitation control system for being applied to the micro-source inverter of micro-capacitance sensor, by following
Technical solution is realized:
Include:
Voltage current transformation module, is configured as: acquiring the output of inverter to the voltage and current signal of bus, carries out
Park Transformation obtains voltage vod, voq, electric current iLd, iLq；
Watt current adjustment module, is configured as: it is poor that the current value and iLd that active reference value obtains after being divided by with vod are made,
It is input to electric current monocycle controller to be adjusted, the watt current after being adjusted；
Reactive current adjustment module, is configured as: the current value and iLq that idle reference value obtains after being divided by with voltage voq
It is poor to make, and is input to electric current monocycle controller and is adjusted, the reactive current after being adjusted；
Signal adjusting module is configured as: will be obtained after the watt current and reactive current progress Parker inverse transformation after adjusting
The signal obtained is control signal after signal modulation SPWM；
Control signal exports to inverter the control for realizing switch tube, the power and power for exporting micro battery inverter
Reference value is consistent.
The design part examples of implementation one of the design parameter of electric current monocycle controller in the examples of implementation, herein no longer into
The detailed discussion of row.
Examples of implementation four
This specification embodiment provides a kind of computer equipment, including memory, processor and storage are on a memory
And the computer program that can be run on a processor, which is characterized in that realize and be applied to when the processor executes described program
The step of constant-power control method of the micro-source inverter of micro-capacitance sensor.
In the examples of implementation, be applied to the detailed process of the constant-power control method of the micro-source inverter of micro-capacitance sensor referring to
Examples of implementation one no longer carry out detailed discussion herein.
It should be noted that although being referred to several modules or submodule of equipment in the detailed description above, it is this
Division is only exemplary rather than enforceable.In fact, in accordance with an embodiment of the present disclosure, two or more above-described moulds
The feature and function of block can embody in a module.Conversely, the feature and function of an above-described module can be with
Further division is to be embodied by multiple modules.
Examples of implementation five
A kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the program is by processor
The step of constant-power control method for the micro-source inverter for being applied to micro-capacitance sensor is realized when execution.
In the examples of implementation, be applied to the detailed process of the constant-power control method of the micro-source inverter of micro-capacitance sensor referring to
Examples of implementation one no longer carry out detailed discussion herein.
In the present embodiment, computer program product may include computer readable storage medium, containing for holding
The computer-readable program instructions of row various aspects of the disclosure.Computer readable storage medium, which can be, can keep and store
By the tangible device for the instruction that instruction execution equipment uses.Computer readable storage medium for example can be-- but it is unlimited
In-- storage device electric, magnetic storage apparatus, light storage device, electric magnetic storage apparatus, semiconductor memory apparatus or above-mentioned
Any appropriate combination.
It is understood that in the description of this specification, reference term " embodiment ", " another embodiment ", " other
The description of embodiment " or " first embodiment~N embodiment " etc. means specific spy described in conjunction with this embodiment or example
Sign, structure, material or feature are included at least one embodiment or example of the invention.In the present specification, to above-mentioned
The schematic representation of term may not refer to the same embodiment or example.Moreover, the specific features of description, structure, material
Person's feature can be combined in any suitable manner in any one or more of the embodiments or examples.
The foregoing is merely preferred embodiment of the present disclosure, are not limited to the disclosure, for the skill of this field
For art personnel, the disclosure can have various modifications and variations.It is all within the spirit and principle of the disclosure, it is made any to repair
Change, equivalent replacement, improvement etc., should be included within the protection scope of the disclosure.
Claims (10)
1. being applied to the constant-power control method of the micro-source inverter of micro-capacitance sensor, characterized in that include:
The output of inverter is acquired to the voltage and current signal of bus, Park Transformation is carried out and obtains voltage vod, voq, electric current
iLd,iLq；
It is poor that the current value and iLd that active reference value and vod are obtained after being divided by are made, and is input to electric current monocycle controller and is adjusted,
Watt current after being adjusted；
It is poor that the current value and iLq that idle reference value and voltage voq are obtained after being divided by are made, and is input to electric current monocycle controller and is adjusted
Section, the reactive current after being adjusted；
By the signal obtained after the watt current and reactive current progress Parker inverse transformation after adjusting after signal modulation SPWM
To control signal；
Control signal exports to inverter the control for realizing switch tube, the power and power reference for exporting micro battery inverter
Value is consistent.
2. being applied to the constant-power control method of the micro-source inverter of micro-capacitance sensor as described in claim 1, characterized in that described
Inverter is three-phase voltage-type inverter.
3. being applied to the constant-power control method of the micro-source inverter of micro-capacitance sensor as described in claim 1, characterized in that assuming that
D axis in two-phase rotating coordinate system is overlapped with busbar voltage vector vod, then busbar voltage vector q axis component voq is 0, is ignored
The electric current on filter capacitor is flowed through, inverter output power is expressed as
P=vodiLd
Q=-vodiLq。
4. being applied to the constant-power control method of the micro-source inverter of micro-capacitance sensor as claimed in claim 3, characterized in that vod
Constant, the dq axis reference value of electric current loop is
iLdref=Pref/vod
iLqref=Qref/vod。
5. being applied to the constant-power control method of the micro-source inverter of micro-capacitance sensor as described in claim 1, characterized in that described
Electric current monocycle controller is pi regulator, and Kpi is the proportionality coefficient of pi regulator；Kii is integral coefficient, ignores the disturbance of vod,
Merge small inertia time constant, enable TII=Ti+0.5Ts, the electric current loop open loop for obtaining iLd passes letter and is
6. being applied to the constant-power control method of the micro-source inverter of micro-capacitance sensor as claimed in claim 5, characterized in that PQ control
Electric current loop pi regulator parameter processed is as follows:
7. being applied to the power limitation control system of the micro-source inverter of micro-capacitance sensor, characterized in that include:
Voltage current transformation module, is configured as: acquiring the output of inverter to the voltage and current signal of bus, carries out Parker
Transformation obtains voltage vod, voq, electric current iLd, iLq；
Watt current adjustment module, is configured as: it is poor that the current value and iLd that active reference value obtains after being divided by with vod are made, input
It is adjusted to electric current monocycle controller, the watt current after being adjusted；
Reactive current adjustment module, is configured as: it is poor that the current value and iLq that idle reference value obtains after being divided by with voltage voq are made,
It is input to electric current monocycle controller to be adjusted, the reactive current after being adjusted；
Signal adjusting module is configured as: by what is obtained after the watt current and reactive current progress Parker inverse transformation after adjusting
Signal is control signal after signal modulation SPWM；
Control signal exports to inverter the control for realizing switch tube, the power and power reference for exporting micro battery inverter
Value is consistent.
8. the use as claimed in claim 7 to the power limitation control system of the micro-source inverter of micro-capacitance sensor, characterized in that described
Inverter is three-phase voltage-type inverter.
9. a kind of computer equipment including memory, processor and stores the meter that can be run on a memory and on a processor
Calculation machine program, which is characterized in that realized when the processor executes described program claim 1-6 it is any it is described be applied to it is micro-
The step of constant-power control method of the micro-source inverter of power grid.
10. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the program is by processor
The step of the constant-power control method of any micro-source inverter for being applied to micro-capacitance sensor of claim 1-6 is realized when execution
Suddenly.
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| CN113890032A (en) * | 2021-09-30 | 2022-01-04 | 国网北京市电力公司 | Power electronic transformer control method and system for power quality management of transformer area |
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