CN107887926A - A kind of garden type load virtual synchronous machine coordinated control system - Google Patents
A kind of garden type load virtual synchronous machine coordinated control system Download PDFInfo
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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
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention provides a kind of garden type load virtual synchronous machine coordinated control system, and it includes dispatching of power netwoks end, system-level concentration tuning controller, Active Power Filter-APF APF, AC power and environment monitoring module；Also include photovoltaic generating module, power electronics load module, energy-storage system module, reactive compensation module, customer charge module and device level frequency modulation and voltage modulation controller；The device level frequency modulation and voltage modulation controller is controlled photovoltaic generating module, power electronics load module and energy-storage system module in real time, the system-level concentration tuning controller is controlled to whole system, load virtual synchronous machine is reached the control targe of primary frequency modulation and frequency modulation frequency modulation.Response time of the present invention according to different load virtual synchronous machine, controlled range, propose the device level controllable burden decentralised control methodology based on virtual synchronous frequency modulation and voltage modulation technology, realize in the short time or during communication failure system virtual synchronous machine autonomous operation.
Description
Technical field
The invention belongs to motor control technology field, more particularly to a kind of garden type load virtual synchronous machine coordinates control system
System.
Background technology
With being continuously increased for new energy permeability, the installation ratio of conventional synchronization generator will be reduced gradually, power train
Spinning reserve capacity and rotary inertia in system are relative to be reduced, and this safe and stable operation to power network brings severe challenge.Again
Person, combining inverter control strategy is different, and distributed power source output power has the characteristics that fluctuation, uncertain in addition, very
Difficulty realizes its plug and play and autonomous coordinated operation.Synchronous generator has friendly advantage natural to power network, if using for reference tradition
Operation of Electric Systems experience, make combining inverter that there is the operation characteristic of similar synchronous generator, then distributed power source can be achieved
Friendly access and improve stability of power system.In addition, the related control strategies of conventional synchronization generator and theory analysis side
Method can be also effectively introduced into wherein.
Therefore, domestic and foreign scholars propose virtual synchronous generator (VSG) technology, the synchronous hair of combining inverter simulation can be made
Motor operation mechanism.Specifically, main ontology model, active frequency modulation and idle pressure regulation by simulating synchronous generator etc.
Characteristic, make combining inverter can be comparable with conventional synchronization generator from operating mechanism and external characteristics.VSG is because being integrated with synchronization
The advantages of generator and enjoy scholar to favor, its application in modern power systems also will be increasingly extensive.VSG essence is to pass through
The operation principle of inverter simulation synchronous generator is controlled, so as to obtain the operation characteristic of similar synchronous generator.VSG control with
The essential distinction of conventional inverter control is that the former simulates the operating mechanism of synchronous generator by control algolithm, but it still may be used
Part retains traditional inverter control link.
The content of the invention
Response time of the present invention according to different load virtual synchronous machine, controlled range, proposition are based on virtual synchronous frequency modulation
The device level controllable burden decentralised control methodology of voltage-regulating technique, the virtual synchronous of system when realizing interior short time or communication failure
Machine autonomous operation.
The present invention is specially a kind of garden type load virtual synchronous machine coordinated control system, and the garden type load is virtually same
Step machine coordinated control system includes dispatching of power netwoks end, system-level concentration tuning controller, Active Power Filter-APF APF, alternating current
Source and environment monitoring module；The dispatching of power netwoks end is carried out with the system-level concentration tuning controller by signal transmssion line
It is bi-directionally connected；The system-level concentration tuning controller is bi-directionally connected with signal transmission bus；The active power filtering
Device APF is connected to electrical bus by grid-connected switch, and the Active Power Filter-APF APF and corresponding grid-connected switch pass through signal
Transmission line is connected to signal transmission bus；The AC power is connected to electrical bus by grid-connected switch, and the grid-connected switch is also
Signal transmission bus is connected to by signal transmssion line；The environment monitoring module is connected to signal by signal transmssion line and transmitted
Bus；
The garden type load virtual synchronous machine coordinated control system also includes photovoltaic generating module, power electronics load mould
Block, energy-storage system module, reactive compensation module and customer charge module；The photovoltaic generating module include photovoltaic module array,
Header box, inverter and corresponding grid-connected switch, photovoltaic module array, header box, inverter and corresponding grid-connected switch pass through electric power
Line is sequentially connected；The power electronics load module includes cold heat load, rectifier and corresponding grid-connected switch, cold heat load,
Rectifier and corresponding grid-connected switch are sequentially connected by power line；The energy-storage system module includes battery management system BMS, electricity
Chi Dui, bidirectional rectifying inverter and corresponding grid-connected switch, battery pile, bidirectional rectifying inverter and corresponding grid-connected switch pass through electric power
Line is sequentially connected；The grid-connected switch of photovoltaic generating module, power electronics load module and energy-storage system module passes through power line
It is connected to the first transformer；The reactive compensation module is connected to electrical bus by corresponding grid-connected switch and the second transformer,
The grid-connected switch and the second transformer are connected to signal transmission bus by signal transmssion line；The customer charge module includes electricity
Electrical automobile charging pile, general load and can cutting load, the electric automobile charging pile passes through corresponding grid-connected switch and the 3rd becomes
Depressor is connected to electrical bus, and the grid-connected switch and the 3rd transformer are connected to signal transmission bus by signal transmssion line；Institute
State general load and electrical bus is connected to by corresponding grid-connected switch and the 4th transformer, the grid-connected switch and the 4th transformer lead to
Cross signal transmssion line and be connected to signal transmission bus；It is described can cutting load be connected to by corresponding grid-connected switch and the 5th transformer
Electrical bus, the grid-connected switch and the 5th transformer are connected to signal transmission bus by signal transmssion line；
The garden type load virtual synchronous machine coordinated control system also includes device level frequency modulation and voltage modulation controller, described to set
Standby level frequency modulation and voltage modulation controller is connected to signal transmission bus by signal transmssion line；The device level frequency modulation and voltage modulation controller leads to
The header box, inverter and corresponding grid-connected switch for crossing signal transmssion line and photovoltaic generating module are connected；The device level frequency modulation
Cold heat load, rectifier and corresponding grid-connected switch of the voltage regulator controllers also by signal transmssion line to power electronics load module
It is connected；The device level frequency modulation and voltage modulation controller also passes through signal transmssion line and the battery management system of energy-storage system module
BMS, bidirectional rectifying inverter and corresponding grid-connected switch are connected；The device level frequency modulation and voltage modulation controller is also transmitted by signal
Line is connected to first transformer；
The device level frequency modulation and voltage modulation controller is to photovoltaic generating module, power electronics load module and energy-storage system module
Controlled in real time, the system-level concentration tuning controller is controlled to whole system, reaches load virtual synchronous machine
The control targe of primary frequency modulation and frequency modulation frequency modulation.
Further, the voltage-regulating system of virtual synchronous machine is the voltage control system of a closed loop, same by measuring
The terminal voltage of generator is walked, excitation voltage is controlled according to the change of terminal voltage, to keep the stabilization of generator voltage.
Further, the voltage-regulating system includes voltage tune difference module and proportional, integral adjustment module；The electricity
Pressure adjusts the formula of voltage difference coefficient of difference module to beWherein, Δ UDChange for the terminal voltage of generator, Δ IQ
Change for reactive current, the value of difference coefficient is smaller, and the fluctuation of voltage is each in parallel to ensure with regard to smaller during sudden load change
Inverter undertakes corresponding load by rated capacity, and lower relation of plane is also met between difference coefficient and distribution power：K1Q1=
K2Q2=...=KnQn, difference coefficient is smaller, and the power of distribution is bigger；The proportional, integral adjustment module share three it is defeated
Enter, respectively the rated voltage U of virtual synchronous generatorref, voltage adjust difference module output UrefAnd inverter output U0, its
Specifically regulation process is：Work as QNDuring=Q, that is, virtual synchronous generator operation is in the state of nominal reactive, U 'ref=
Uref, the output voltage of system is rated voltage, when reactive load is mutated, Δ Q ≠ 0, by the regulation of excitation controller, is
System operates in a new voltage level.
Further, the detailed process of the frequency regulation of virtual synchronous machine is：It is synchronous when system operation is in rated frequency
Power input to machine changes delta PmIt is zero, the output of functions combination device is rated power PmN, now balanced with electromagnetic power；Work as load
When uprushing, virtual synchronous motor output electromagnetic power increases therewith, but mechanical output control lag, can not now become therewith
Change, virtual synchronous generator power is unbalance, and system frequency reduces therewith, and after detecting frequency change, system is adjusted by frequency
System call interception inputs mechanical output, until it is balanced with electromagnetic power again, frequency settles out again；When load dump,
Virtual synchronous motor output electromagnetic power reduces therewith, but mechanical output control lag, can not now change therewith, virtual same
Step generator power is unbalance, and system frequency increases therewith, and after detecting frequency change, system is defeated by functions combination system call interception
Enter mechanical output, until it is balanced with electromagnetic power again, frequency settles out again；When load is uprushed, inputted in increase
Frequency is also diminishing while mechanical output, and this is primary frequency modulation；System is set to come back to volume by changing frequency adjustment curve
Determine frequency, as frequency modulation frequency modulation.
Further, for the different inverter of capacity, it loads distribution and meets R1P1=R2P2=...=RnPn, RnFor
Difference coefficient, PnFor the load of n-th inverter distribution.
Brief description of the drawings
Fig. 1 is a kind of structure composition schematic diagram of garden type load virtual synchronous machine coordinated control system of the present invention；
Fig. 2 is the structured flowchart of voltage-regulating system of the present invention；
Fig. 3 is the structured flowchart of frequency regulating system of the present invention.
Embodiment
Below in conjunction with the accompanying drawings to a kind of specific embodiment party of garden type load virtual synchronous machine coordinated control system of the present invention
Formula elaborates.
As shown in figure 1, the garden type load virtual synchronous machine coordinated control system of the present invention includes dispatching of power netwoks end, system
Level concentrates tuning controller, Active Power Filter-APF APF, AC power and environment monitoring module；The dispatching of power netwoks end with
The system-level concentration tuning controller is bi-directionally connected by signal transmssion line；It is described it is system-level concentration tuning controller with
Signal transmission bus is bi-directionally connected；The Active Power Filter-APF APF is connected to electrical bus by grid-connected switch, described
Active Power Filter-APF APF and corresponding grid-connected switch are connected to signal transmission bus by signal transmssion line；The alternating current
Source is connected to electrical bus by grid-connected switch, and the grid-connected switch is also connected to signal transmission bus by signal transmssion line；Institute
State environment monitoring module and signal transmission bus is connected to by signal transmssion line.
The garden type load virtual synchronous machine coordinated control system also includes photovoltaic generating module, power electronics load mould
Block, energy-storage system module, reactive compensation module and customer charge module；The photovoltaic generating module include photovoltaic module array,
Header box, inverter and corresponding grid-connected switch, photovoltaic module array, header box, inverter and corresponding grid-connected switch pass through electric power
Line is sequentially connected；The power electronics load module includes cold heat load, rectifier and corresponding grid-connected switch, cold heat load,
Rectifier and corresponding grid-connected switch are sequentially connected by power line；The energy-storage system module includes battery management system BMS, electricity
Chi Dui, bidirectional rectifying inverter and corresponding grid-connected switch, battery pile, bidirectional rectifying inverter and corresponding grid-connected switch pass through electric power
Line is sequentially connected；The grid-connected switch of photovoltaic generating module, power electronics load module and energy-storage system module passes through power line
It is connected to the first transformer；The reactive compensation module is connected to electrical bus by corresponding grid-connected switch and the second transformer,
The grid-connected switch and the second transformer are connected to signal transmission bus by signal transmssion line；The customer charge module includes electricity
Electrical automobile charging pile, general load and can cutting load, the electric automobile charging pile passes through corresponding grid-connected switch and the 3rd becomes
Depressor is connected to electrical bus, and the grid-connected switch and the 3rd transformer are connected to signal transmission bus by signal transmssion line；Institute
State general load and electrical bus is connected to by corresponding grid-connected switch and the 4th transformer, the grid-connected switch and the 4th transformer lead to
Cross signal transmssion line and be connected to signal transmission bus；It is described can cutting load be connected to by corresponding grid-connected switch and the 5th transformer
Electrical bus, the grid-connected switch and the 5th transformer are connected to signal transmission bus by signal transmssion line.
The garden type load virtual synchronous machine coordinated control system also includes device level frequency modulation and voltage modulation controller, described to set
Standby level frequency modulation and voltage modulation controller is connected to signal transmission bus by signal transmssion line；The device level frequency modulation and voltage modulation controller leads to
The header box, inverter and corresponding grid-connected switch for crossing signal transmssion line and photovoltaic generating module are connected；The device level frequency modulation
Cold heat load, rectifier and corresponding grid-connected switch of the voltage regulator controllers also by signal transmssion line to power electronics load module
It is connected；The device level frequency modulation and voltage modulation controller also passes through signal transmssion line and the battery management system of energy-storage system module
BMS, bidirectional rectifying inverter and corresponding grid-connected switch are connected；The device level frequency modulation and voltage modulation controller is also transmitted by signal
Line is connected to first transformer.
The device level frequency modulation and voltage modulation controller is to photovoltaic generating module, power electronics load module and energy-storage system module
Controlled in real time, the system-level concentration tuning controller is controlled to whole system, reaches load virtual synchronous machine
The control targe of primary frequency modulation and frequency modulation frequency modulation.
As shown in Fig. 2 the voltage-regulating system of virtual synchronous machine is the voltage control system of a closed loop, it is same by measuring
The terminal voltage of generator is walked, excitation voltage is controlled according to the change of terminal voltage, to keep the stabilization of generator voltage.
The voltage-regulating system includes voltage and adjusts difference module and proportional, integral adjustment module；The voltage adjusts differential mode
The formula of the voltage difference coefficient of block isWherein, Δ UDChange for the terminal voltage of generator, Δ IQFor idle electricity
Rheology, the value of difference coefficient is smaller, and the fluctuation of voltage is with regard to smaller during sudden load change, to ensure each inverter in parallel
Corresponding load is undertaken by rated capacity, lower relation of plane is also met between difference coefficient and distribution power：K1Q1=K2Q2=...
=KnQn, difference coefficient is smaller, and the power of distribution is bigger；The proportional, integral adjustment module shares three inputs, is respectively
The rated voltage U of virtual synchronous generatorref, voltage adjust difference module output U 'refAnd inverter output U0, its specific tune
Section process is：Work as QNDuring=Q, that is, virtual synchronous generator operation is in the state of nominal reactive, U 'ref=Uref, system
Output voltage be rated voltage, when reactive load is mutated, Δ Q ≠ 0, by the regulation of excitation controller, system operation exists
One new voltage level.
As shown in figure 3, the detailed process of the frequency regulation of virtual synchronous machine is：When system operation is in rated frequency, together
Walk power input to machine changes delta PmIt is zero, the output of functions combination device is rated power PmN, now balanced with electromagnetic power；When negative
When load is uprushed, virtual synchronous motor output electromagnetic power increases therewith, but mechanical output control lag, can not now become therewith
Change, virtual synchronous generator power is unbalance, and system frequency reduces therewith, and after detecting frequency change, system is adjusted by frequency
System call interception inputs mechanical output, until it is balanced with electromagnetic power again, frequency settles out again；When load dump,
Virtual synchronous motor output electromagnetic power reduces therewith, but mechanical output control lag, can not now change therewith, virtual same
Step generator power is unbalance, and system frequency increases therewith, and after detecting frequency change, system is defeated by functions combination system call interception
Enter mechanical output, until it is balanced with electromagnetic power again, frequency settles out again；When load is uprushed, inputted in increase
Frequency is also diminishing while mechanical output, and this is primary frequency modulation；System is set to come back to volume by changing frequency adjustment curve
Determine frequency, as frequency modulation frequency modulation.
For the different inverter of capacity, it loads distribution and meets R1P1=R2P2=...=RnPn, RnFor difference coefficient,
PnFor the load of n-th inverter distribution.
Finally it should be noted that only illustrating technical scheme rather than its limitations with reference to above-described embodiment.Institute
The those of ordinary skill in category field is it is to be understood that those skilled in the art can repair to the embodiment of the present invention
Change or equivalent substitution, but these modifications or change are among pending claims are applied for.
Claims (5)
- A kind of 1. garden type load virtual synchronous machine coordinated control system, it is characterised in that the garden type load virtual synchronous Machine coordinated control system includes dispatching of power netwoks end, system-level concentration tuning controller, Active Power Filter-APF APF, AC power And environment monitoring module；The dispatching of power netwoks end is carried out double with the system-level concentration tuning controller by signal transmssion line To connection；The system-level concentration tuning controller is bi-directionally connected with signal transmission bus；The Active Power Filter-APF APF is connected to electrical bus by grid-connected switch, and the Active Power Filter-APF APF and corresponding grid-connected switch are passed by signal Defeated line is connected to signal transmission bus；The AC power is connected to electrical bus by grid-connected switch, and the grid-connected switch is also logical Cross signal transmssion line and be connected to signal transmission bus；The environment monitoring module is connected to signal transmission always by signal transmssion line Line；The garden type load virtual synchronous machine coordinated control system also include photovoltaic generating module, power electronics load module, Energy-storage system module, reactive compensation module and customer charge module；The photovoltaic generating module includes photovoltaic module array, confluxed Case, inverter and corresponding grid-connected switch, photovoltaic module array, header box, inverter and corresponding grid-connected switch by power line according to Secondary connection；The power electronics load module includes cold heat load, rectifier and corresponding grid-connected switch, cold heat load, rectification Device and corresponding grid-connected switch are sequentially connected by power line；The energy-storage system module includes battery management system BMS, battery Heap, bidirectional rectifying inverter and corresponding grid-connected switch, battery pile, bidirectional rectifying inverter and corresponding grid-connected switch pass through power line It is sequentially connected；The grid-connected switch of photovoltaic generating module, power electronics load module and energy-storage system module is connected by power line It is connected to the first transformer；The reactive compensation module is connected to electrical bus by corresponding grid-connected switch and the second transformer, should Grid-connected switch and the second transformer are connected to signal transmission bus by signal transmssion line；The customer charge module includes electronic Automobile charging pile, general load and can cutting load, the electric automobile charging pile passes through corresponding grid-connected switch and the 3rd transformation Device is connected to electrical bus, and the grid-connected switch and the 3rd transformer are connected to signal transmission bus by signal transmssion line；It is described General load is connected to electrical bus by corresponding grid-connected switch and the 4th transformer, and the grid-connected switch and the 4th transformer pass through Signal transmssion line is connected to signal transmission bus；It is described can cutting load electricity is connected to by corresponding grid-connected switch and the 5th transformer Power bus, the grid-connected switch and the 5th transformer are connected to signal transmission bus by signal transmssion line；The garden type load virtual synchronous machine coordinated control system also includes device level frequency modulation and voltage modulation controller, the device level Frequency modulation and voltage modulation controller is connected to signal transmission bus by signal transmssion line；The device level frequency modulation and voltage modulation controller passes through letter Number transmission line is connected to the header box, inverter and corresponding grid-connected switch of photovoltaic generating module；The device level frequency modulation and voltage modulation Controller is also connected by signal transmssion line to the cold heat load, rectifier and corresponding grid-connected switch of power electronics load module Connect；The device level frequency modulation and voltage modulation controller is also by the battery management system BMS of signal transmssion line and energy-storage system module, double It is connected to rectification adverser and corresponding grid-connected switch；The device level frequency modulation and voltage modulation controller is also connected by signal transmssion line To first transformer；The device level frequency modulation and voltage modulation controller is carried out to photovoltaic generating module, power electronics load module and energy-storage system module Control in real time, the system-level concentration tuning controller are controlled to whole system, load virtual synchronous machine is reached once The control targe of frequency modulation and frequency modulation frequency modulation.
- 2. a kind of garden type load virtual synchronous machine coordinated control system according to claim 1, it is characterised in that virtual The voltage-regulating system of synchronous machine is the voltage control system of a closed loop, by measuring the terminal voltage of synchronous generator, according to The change control excitation voltage of terminal voltage, to keep the stabilization of generator voltage.
- 3. a kind of garden type load virtual synchronous machine coordinated control system according to claim 2, it is characterised in that described Voltage-regulating system includes voltage and adjusts difference module and proportional, integral adjustment module；It is poor that the voltage adjusts the voltage of difference module to adjust The formula of coefficient isWherein, Δ UDChange for the terminal voltage of generator, Δ IQChange for reactive current, it is poor to adjust The value of coefficient is smaller, and the fluctuation of voltage is with regard to smaller during sudden load change, to ensure that each inverter in parallel presses rated capacity Corresponding load is undertaken, lower relation of plane is also met between difference coefficient and distribution power：K1Q1=K2Q2=...=KnQn, it is poor to adjust Coefficient is smaller, and the power of distribution is bigger；The proportional, integral adjustment module shares three inputs, and respectively virtual synchronous is sent out The rated voltage U of motorref, voltage adjust difference module output U 'refAnd inverter output U0, it specifically adjusts process and is： Work as QNDuring=Q, that is, virtual synchronous generator operation is in the state of nominal reactive, U 'ref=Uref, the output voltage of system For rated voltage, when reactive load is mutated, Δ Q ≠ 0, by the regulation of excitation controller, system operation is in a new electricity Voltage levels.
- 4. a kind of garden type load virtual synchronous machine coordinated control system according to claim 1, it is characterised in that virtual Synchronous machine frequency regulation detailed process be：When system operation is in rated frequency, synchronous motor input power changes delta Pm It is zero, the output of functions combination device is rated power PmN, now balanced with electromagnetic power；When load is uprushed, virtual synchronous motor Output electromagnetic power increases therewith, but mechanical output control lag, can not now change therewith, virtual synchronous generator power Unbalance, system frequency reduces therewith, and after detecting frequency change, system adjusts input mechanical output by frequency regulating system, Until it is balanced with electromagnetic power again, frequency settles out again；When load dump, virtual synchronous motor output electromagnetic work Rate reduces therewith, but mechanical output control lag, can not now change therewith, and virtual synchronous generator power is unbalance, system Frequency increases therewith, and after detecting frequency change, system inputs mechanical output by functions combination system call interception, until it is again Balanced with electromagnetic power, frequency settles out again；When load is uprushed, frequency also exists while increase inputs mechanical output Diminish, this is primary frequency modulation；System is set to come back to rated frequency, as frequency modulation frequency modulation by changing frequency adjustment curve.
- A kind of 5. garden type load virtual synchronous machine coordinated control system according to claim 4, it is characterised in that for The different inverter of capacity, it loads distribution and meets R1P1=R2P2=...=RnPn, RnFor difference coefficient, PnFor n-th inversion The load of power distribution.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108377004A (en) * | 2018-04-23 | 2018-08-07 | 华北电力科学研究院有限责任公司 | Frequency modulation method and system are coordinated in wind storage based on virtual synchronous machine |
| CN109347138A (en) * | 2018-09-25 | 2019-02-15 | 科大智能（合肥）科技有限公司 | A kind of garden light storage micro-capacitance sensor control method |
| CN111030159A (en) * | 2018-10-10 | 2020-04-17 | 中国电力科学研究院有限公司 | Photovoltaic virtual synchronous generator control method and system |
| CN114759610A (en) * | 2022-04-06 | 2022-07-15 | 上海电气工程设计有限公司 | Wind and light combustion and storage integrated energy system based on wind and light virtual synchronous machine |
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| CN109347138B (en) * | 2018-09-25 | 2021-12-14 | 科大智能（合肥）科技有限公司 | Method for realizing control of park light storage micro-grid |
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| CN111030159B (en) * | 2018-10-10 | 2022-12-16 | 中国电力科学研究院有限公司 | Photovoltaic virtual synchronous generator control method and system |
| CN114759610A (en) * | 2022-04-06 | 2022-07-15 | 上海电气工程设计有限公司 | Wind and light combustion and storage integrated energy system based on wind and light virtual synchronous machine |
| CN114759610B (en) * | 2022-04-06 | 2024-05-10 | 上海电气工程设计有限公司 | Wind-light combustion comprehensive energy system based on wind-light virtual synchronous machine |
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