CN110429609A - Microgrid voltage regulation and control system and method - Google Patents
Microgrid voltage regulation and control system and method Download PDFInfo
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- CN110429609A CN110429609A CN201910810344.1A CN201910810344A CN110429609A CN 110429609 A CN110429609 A CN 110429609A CN 201910810344 A CN201910810344 A CN 201910810344A CN 110429609 A CN110429609 A CN 110429609A
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000004891 communication Methods 0.000 claims abstract description 47
- 230000001105 regulatory effect Effects 0.000 claims abstract description 27
- 238000005070 sampling Methods 0.000 claims abstract description 10
- 238000007665 sagging Methods 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 10
- 230000001276 controlling effect Effects 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 7
- 230000003111 delayed effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000006855 networking Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
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- 238000005457 optimization Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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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
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
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Abstract
The application discloses little electric wire netting voltage regulation system and method, including a plurality of controllers of interconnect, every controller all includes: a voltage sampling module for acquiring the output voltage of the corresponding inverter; a difference value calculation module for determining a voltage difference value according to the output voltage and the reference voltage; a delay determining module for determining the waiting time corresponding to the voltage difference value according to the communication waiting rule; the delay triggering module is used for determining the voltage difference value as a target voltage regulating value when the voltage difference value sent by other controllers is received in the waiting time, and is also used for determining the voltage difference value in the controller as the target voltage regulating value after the waiting time and sending the target voltage regulating value to all other controllers; and performing voltage compensation according to the target voltage regulating value, and triggering the voltage sampling module. In the application, the controllers are mutually connected to form a network, the communication control mode is simple to realize, the applicability is high, the requirements on the communication speed and the reliability of the system are not high, and the cost of a communication part is greatly reduced.
Description
Technical field
The present invention relates to micro-capacitance sensors to run field, in particular to a kind of micro-capacitance sensor voltage regulator control system and method.
Background technique
The principal mode that micro-capacitance sensor is utilized as distributed energy, because its is miniature, cleaning, autonomous, flexible the features such as due to it is standby
By the favor of people.In micro-capacitance sensor, it is power supply for electrical equipment that distributed energy passes through inverter to be incorporated to ac bus mostly, therefore
The power quality of micro-capacitance sensor is determined to the control effect of inverter.The control method that wherein inverter uses is generally sagging control
It makes, the sagging coefficient in the sagging control of traditional inverter immobilizes, thus carries out load switching and function in isolated island micro-capacitance sensor
Rate is likely to result in the great variety of inverter output voltage when adjusting, so that the amplitude and reason of isolated island microgrid inverter voltage
Think to generate relatively large deviation between value, to the electrical equipment in system, especially sensitive load, threatens, seriously affect isolated island
Quality of voltage in microgrid inverter.
In order to solve this voltage deviation, research staff proposes the scheme of more shunt chopper pressure regulation, obtains first
The operation data of all inverters in micro-capacitance sensor, then issues the control instruction to each inverter, to realize to inverter
Sagging control reaches the preferable dynamic characteristic that real-time tracking adjusts contravarianter voltage.But this method wants system communication
Ask higher, the regulating power of system is highly susceptible to the influence of communication delay.
Therefore, how to provide a kind of scheme of solution above-mentioned technical problem is that current those skilled in the art need to solve
Problem.
Summary of the invention
In view of this, the purpose of the present invention is to provide the lower micro-capacitance sensor voltage tune of a kind of pair of system communication Capability Requirement
Control system and method.Its concrete scheme is as follows:
A kind of micro-capacitance sensor voltage regulator control system, including with multiple inverters multiple controllers correspondingly, it is multiple described
Controller is connected with each other, and each controller includes:
Voltage sample module, for obtaining the output voltage of the corresponding inverter；
Difference calculating module, for determining voltage difference according to the output voltage and reference voltage；
Be delayed determining module, for determining the waiting time of the corresponding voltage difference according to communication standby rule；
Time-delayed trigger module, will when for receiving the voltage difference of other controllers transmissions within the waiting time
The voltage difference is determined as target pressure regulation value, be also used to after the waiting time by voltage difference in the controller determine
For the target pressure regulation value and it is sent to other all controllers；
Voltage regulating module for carrying out voltage compensation according to the target pressure regulation value, and triggers the voltage sample module, with
Update current output voltage, current voltage difference, current waiting time.
Preferably, any Time-delayed trigger module includes:
Timer, for the timing since when receiving the signal of the waiting time and when reaching the waiting time
Export trigger signal；
Communicating circuit owns for the voltage difference of place controller to be sent to other when receiving the trigger signal
The controller is also used to receive the voltage difference that other described controllers are sent；
Logic circuit is made for that will receive the voltage difference that other the described controllers received before the trigger signal are sent
Be sent to the voltage regulating module for target pressure regulation value, be also used to when receiving the trigger signal by voltage in the controller
Difference is sent to the voltage regulating module as the target pressure regulation value.
Preferably, to be specially the voltage difference positively related communicate the communication standby rule with the waiting time
To rule.
Preferably, the communication standby rule be specially the voltage difference and the waiting time it is linear positively related logical
Letter waits rule.
Preferably, the voltage regulating module is specifically used for:
Voltage compensation is carried out according to the target pressure regulation value by adjusting sagging controlling curve.
Preferably, the micro-capacitance sensor voltage regulator control system further include:
Current sampling module, for obtaining the output electric current of the corresponding inverter.
Preferably, the voltage regulating module further include:
Electric signal control ring and SPWM modulation module.
Correspondingly, the invention also discloses a kind of micro-capacitance sensor voltages to regulate and control method, it is applied to micro-capacitance sensor voltage regulator control system
In the controller of corresponding any inverter, comprising:
Obtain the output voltage of the corresponding inverter；
Voltage difference is determined according to the output voltage and reference voltage；
The waiting time of the corresponding voltage difference is determined according to communication standby rule；
Within the waiting time, the voltage difference is determined as when receiving the voltage difference that other described controllers are sent
Target pressure regulation value, to carry out voltage compensation, and the step of executing the output voltage for obtaining the corresponding inverter again,
To update current output voltage, current voltage difference, current waiting time；
After the waiting time, by voltage difference in the controller be sent to other all controllers, and
The voltage difference is determined as the target pressure regulation value, to carry out voltage compensation.
The invention discloses a kind of micro-capacitance sensor voltage regulator control systems, including with the multiple controls correspondingly of multiple inverters
Device, multiple controllers are connected with each other, and each controller includes: voltage sample module, for obtaining corresponding institute
State the output voltage of inverter；Difference calculating module, for determining voltage difference according to the output voltage and reference voltage；Prolong
When determining module, for determining the waiting time of the corresponding voltage difference according to communication standby rule；Time-delayed trigger module is used
The voltage difference is determined as target tune when receiving the voltage difference that other described controllers are sent within the waiting time
Pressure value, be also used to after the waiting time by voltage difference in the controller be determined as the target pressure regulation value and send
To other all controllers；Voltage regulating module for carrying out voltage compensation according to the target pressure regulation value, and triggers the electricity
Sampling module is pressed, to update current output voltage, current voltage difference, current waiting time.In the present invention multiple controllers it
Between be connected with each other networking, each controller determines the waiting time by communication standby rule, according to its received in the waiting time
The voltage difference of his controller carries out pressure regulation and updates output voltage, voltage difference and waiting time, after reaching the waiting time
The voltage difference that the whole network sends oneself makes other controller pressure regulation, and this communication control mode realizes simple, strong applicability, and right
The communication speed and reliability requirement of system be not high, greatly reduces the cost of communications portion.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of structural schematic diagram of micro-capacitance sensor voltage regulator control system in the embodiment of the present invention；
Fig. 2 a is the image schematic diagram of a sagging controlling curve in the embodiment of the present invention；
Fig. 2 b is the image schematic diagram of another sagging controlling curve in the embodiment of the present invention；
Fig. 3 is a kind of System Control Figure of electric signal control ring in the embodiment of the present invention；
Fig. 4 is a kind of structural schematic diagram of specific micro-capacitance sensor voltage regulator control system in the embodiment of the present invention；
Fig. 5 is a kind of step flow chart of micro-capacitance sensor voltage regulation method in the embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Research staff proposes the scheme of more shunt chopper pressure regulation in the prior art, and this method is to system communication
More demanding, the regulating power of system is highly susceptible to the influence of communication delay.It is mutually interconnected between multiple controllers in the present invention
It is connected into net, each controller determines the waiting time by communication standby rule, according to other controllers received in the waiting time
Voltage difference carry out pressure regulation and updating output voltage, voltage difference and waiting time, the whole network transmission after reaching the waiting time
The voltage difference of oneself makes other controller pressure regulation, and this communication control mode realizes simple, strong applicability, and leads to system
Believe that speed and reliability requirement be not high, greatly reduces the cost of communications portion.
The embodiment of the invention discloses a kind of micro-capacitance sensor voltage regulator control systems, including one-to-one with multiple inverters 1
Multiple controllers 2, multiple controllers 2 are connected with each other, and for including Fig. 1 of two controllers, each controller 2 includes:
Voltage sample module 21, for obtaining the output voltage of corresponding inverter 1；
Difference calculating module 22, for determining voltage difference according to output voltage and reference voltage；
Be delayed determining module 23, for determining the waiting time of corresponding voltage difference according to communication standby rule；
Time-delayed trigger module 24, by the electricity when for receiving the voltage difference of other controllers 2 transmission within the waiting time
Pressure difference is determined as target pressure regulation value, is also used to that the voltage difference in place controller 2 is determined as target after the waiting time
Pressure regulation value is simultaneously sent to other all controllers 2；
Voltage regulating module 25, for carrying out voltage compensation, and trigger voltage sampling module 21 according to target pressure regulation value, to update
Current output voltage, current voltage difference, current waiting time.
It is understood that there are two types of the operation conditions of voltage regulating module 25, one is by other controllers 2 in the waiting time
The voltage difference of transmission carries out voltage compensation as target pressure regulation value, and another kind is after the waiting time by place controller 2
The voltage difference that middle difference calculating module 22 determines carries out voltage compensation as target pressure regulation value；Set out right away electricity after voltage compensation
Pressure sampling module 21 updates all data, that is to say, that if receiving the voltage of other controllers 2 transmission within the waiting time
Difference, in local controller 2 voltage regulating module 25 must update after voltage compensation current output voltage, current voltage difference,
Current waiting time, 24 reclocking of Time-delayed trigger module are subject to the updated waiting time.
Further, voltage regulating module 25 is specifically used for carrying out voltage according to target pressure regulation value by adjusting sagging controlling curve
Compensation.
In view of the application of sagging controlling curve, micro-capacitance sensor voltage regulator control system further include:
Current sampling module 26, for obtaining the output electric current of corresponding inverter.
Correspondingly, voltage regulating module 25 further includes electric signal control ring and SPWM modulation module.
Specifically, the output electricity of inverter 1 where being obtained respectively by voltage sample module 21 and current sampling module 26
Press ua、ubAnd uc, output electric current ia、ibAnd ic, to the output voltage u of abc coordinate systema、ubAnd uc, output electric current ia、ibAnd icInto
Row park converts to obtain the voltage u under dq coordinate systemdAnd uqAnd the electric current i under dq coordinate systemdAnd iq。
Voltage compensation is carried out according to traditional sagging control strategy of inverter in voltage regulating module 25 at this time, utilizes generator end
The frequency and active power of voltage, the relationship for the amplitude and reactive power for holding voltage carry out frequency modulation and voltage modulation, the sagging control of two of them
Koji-making line is as shown in Figure 2 a and 2 b, and equation is respectively as follows:
ωn=ω*-mnPn, Un=U*-nnQn；
WhereinωnAnd UnRespectively target frequency and target voltage, ω*And U*Respectively
For reference frequency and reference voltage, PnAnd QnRespectively target active power and target reactive power, PmaxAnd QmaxIt is respectively maximum
Active power and maximum reactive power, ωminAnd UminRespectively minimum frequency and minimum voltage.
And then rate target and target voltage are utilized, sagging control voltage is obtained by trigonometric function operation, then by power
The voltage and feedback signal that sagging control generates are sent to electric signal control ring, shown in Figure 3, and electric signal control ring includes electricity
Control ring and current regulator two parts are pressed, then SPWM modulation module is sent by the signal that electric signal control ring exports and generates
SPWM modulated signal is come the on-off of switching tube in inverter 1 where controlling.
In the present embodiment, as long as Time-delayed trigger module 24 determines target pressure regulation value, voltage regulating module 25 will do it voltage benefit
Simultaneously trigger voltage sampling module 21 is repaid, by repeatedly communicating with after voltage compensation, the output voltage of each inverter 1 all will
Near compensation to reference voltage value, to improve the quality of voltage of inverter 1.
Networking is connected with each other in the present embodiment between multiple controllers, each controller is determining etc. by communication standby rule
To the time, pressure regulation is carried out according to the voltage difference of other controllers received in the waiting time and updates output voltage, voltage difference
Value and waiting time, the voltage difference that the whole network sends oneself after reaching the waiting time make other controller pressure regulation, this communication
Control mode realizes simple, strong applicability, and not high to the communication speed and reliability requirement of system, greatly reduces communication unit
The cost divided.
The embodiment of the invention discloses a kind of a kind of specific micro-capacitance sensor voltage control system, relative to a upper embodiment,
The present embodiment has made further instruction and optimization to technical solution.Specifically, shown in Figure 4, any Time-delayed trigger module
24 include:
Timer 241 exports touching for the timing since when receiving the signal of waiting time and when reaching the waiting time
It signals；
Communicating circuit 242 owns for the voltage difference of place controller to be sent to other when receiving trigger signal
Controller 2 is also used to receive the voltage difference of other controllers 2 transmission；
Logic circuit 243, for voltage difference that other controllers 2 received before trigger signal are sent will to be received as mesh
Mark pressure regulation value be sent to voltage regulating module 25, be also used to when receiving trigger signal using the voltage difference in place controller 2 as
Target pressure regulation value is sent to voltage regulating module 25.
Further, communication standby rule is specially voltage difference and waiting time positively related communication standby rule.
That is, voltage difference is smaller, the determining waiting time is shorter, and voltage difference is smaller, and communication priority is higher,
All inverters 1 target pressure regulation value determining first be it is one the smallest in all voltage differences, all inverters 1 are according to this
Target pressure regulation value carries out voltage compensation, and voltage sample module 21 updates other data in controller 2 where triggering, and enables timing
Device 241 restarts timing；
Further, communication standby rule is specially that voltage difference and waiting time, linearly positively related communication standby was regular.
The communication priority of each inverter 1 is not determined according to communication standby rule in the present embodiment, pressure regulation priority level
According to communication priority not Que Ding, when a certain controller 2 do not received within the waiting time other controllers 2 transmission voltage difference
Value, then at this time the controller 2 communication priority not, pressure regulation priority level be highest, voltage regulating module 25 carry out last time
The real-time output voltage of inverter 1 is corresponded to after pressure regulation, voltage difference has reached engine request range, can stop to the inversion
The pressure regulation of device.
Correspondingly, the embodiment of the invention also discloses a kind of micro-capacitance sensor voltages to regulate and control method, it is applied to micro-capacitance sensor voltage tune
Control system corresponds in the controller of any inverter, shown in Figure 5, comprising:
S1: the output voltage of corresponding inverter is obtained；
S2: voltage difference is determined according to output voltage and reference voltage；
S3: the waiting time of corresponding voltage difference is determined according to communication standby rule；
S4: within the waiting time, the voltage difference is determined as target when receiving the voltage difference of other controllers transmission
Pressure regulation value, to carry out voltage compensation, and the step of executing the output voltage for obtaining corresponding inverter again, it is current defeated to update
Voltage, current voltage difference, current waiting time out；
S5: after the waiting time, by voltage difference in the controller be sent to other all controllers, and by the electricity
Pressure difference is determined as target pressure regulation value, to carry out voltage compensation.
Networking is connected with each other in the present embodiment between multiple controllers, each controller is determining etc. by communication standby rule
To the time, pressure regulation is carried out according to the voltage difference of other controllers received in the waiting time and updates output voltage, voltage difference
Value and waiting time, the voltage difference that the whole network sends oneself after reaching the waiting time make other controller pressure regulation, this whole network
Simple, strong applicability is realized in communication, the communication control mode for being repeated as many times pressure regulation, and is wanted to the communication speed and reliability of system
It asks not high, greatly reduces the cost of communications portion.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
A kind of micro-capacitance sensor voltage regulator control system provided by the present invention and method are described in detail above, herein
Apply that a specific example illustrates the principle and implementation of the invention, the explanation of above example is only intended to help
Understand method and its core concept of the invention；At the same time, for those skilled in the art, according to the thought of the present invention,
There will be changes in the specific implementation manner and application range, in conclusion the content of the present specification should not be construed as to this
The limitation of invention.
Claims (8)
1. a kind of micro-capacitance sensor voltage regulator control system, which is characterized in that including with multiple inverters multiple controllers correspondingly,
Multiple controllers are connected with each other, and each controller includes:
Voltage sample module, for obtaining the output voltage of the corresponding inverter；
Difference calculating module, for determining voltage difference according to the output voltage and reference voltage；
Be delayed determining module, for determining the waiting time of the corresponding voltage difference according to communication standby rule；
Time-delayed trigger module, by the electricity when for receiving the voltage difference of other controllers transmissions within the waiting time
Pressure difference is determined as target pressure regulation value, be also used to after the waiting time by voltage difference in the controller be determined as institute
It states target pressure regulation value and is sent to other all controllers；
Voltage regulating module for carrying out voltage compensation according to the target pressure regulation value, and triggers the voltage sample module, to update
Current output voltage, current voltage difference, current waiting time.
2. micro-capacitance sensor voltage regulator control system according to claim 1, which is characterized in that any Time-delayed trigger module packet
It includes:
Timer, for timing and the output when reaching the waiting time since when receiving the signal of the waiting time
Trigger signal；
Communicating circuit, it is all described for the voltage difference of place controller to be sent to other when receiving the trigger signal
Controller is also used to receive the voltage difference that other described controllers are sent；
Logic circuit, for the voltage difference of other controllers transmissions received before the trigger signal will to be received as mesh
Mark pressure regulation value is sent to the voltage regulating module, be also used to when receiving the trigger signal by voltage difference in the controller
The voltage regulating module is sent to as the target pressure regulation value.
3. micro-capacitance sensor voltage regulator control system according to claim 2, which is characterized in that
The communication standby rule is specially the voltage difference and the waiting time positively related communication standby rule.
4. micro-capacitance sensor voltage regulator control system according to claim 3, which is characterized in that
The communication standby rule is specially that the voltage difference and the waiting time, linearly positively related communication standby was regular.
5. according to claim 1 to any one of 4 micro-capacitance sensor voltage regulator control systems, which is characterized in that the voltage regulating module tool
Body is used for:
Voltage compensation is carried out according to the target pressure regulation value by adjusting sagging controlling curve.
6. micro-capacitance sensor voltage regulator control system according to claim 5, which is characterized in that further include:
Current sampling module, for obtaining the output electric current of the corresponding inverter.
7. micro-capacitance sensor voltage regulator control system according to claim 6, which is characterized in that the voltage regulating module further include:
Electric signal control ring and SPWM modulation module.
8. a kind of micro-capacitance sensor voltage regulates and controls method, which is characterized in that be applied to micro-capacitance sensor voltage regulator control system and correspond to any inversion
In the controller of device, comprising:
Obtain the output voltage of the corresponding inverter；
Voltage difference is determined according to the output voltage and reference voltage；
The waiting time of the corresponding voltage difference is determined according to communication standby rule；
Within the waiting time, the voltage difference is determined as target when receiving the voltage difference that other described controllers are sent
Pressure regulation value, to carry out voltage compensation, and the step of executing the output voltage for obtaining the corresponding inverter again, with more
New current output voltage, current voltage difference, current waiting time；
After the waiting time, by voltage difference in the controller be sent to other all controllers, and should
Voltage difference is determined as the target pressure regulation value, to carry out voltage compensation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910810344.1A CN110429609A (en) | 2019-08-29 | 2019-08-29 | Microgrid voltage regulation and control system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910810344.1A CN110429609A (en) | 2019-08-29 | 2019-08-29 | Microgrid voltage regulation and control system and method |
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| CN113530795A (en) * | 2021-06-25 | 2021-10-22 | 江苏苏中药业集团医疗器械有限公司 | Voltage compensation method based on medical vacuum negative pressure machine |
| CN113777434A (en) * | 2021-09-24 | 2021-12-10 | 珠海格力电器股份有限公司 | Fault monitoring method and device and power supply and distribution system |
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