Region reactive voltage control method for coordinating and device
Technical field
The present invention relates to technical field of electric power, and in particular to a kind of region reactive voltage control method for coordinating, device, terminal
And storage medium.
Background technique
In traditional generation mode, fossil energy as the energy being widely used, send out by synchronous by driving rotation
Motor issues electric energy and then is connected to the grid system for users to use.And distributed energy is being incorporated to big network system or micro- electricity
When in net, usually accessed by the inversion interface of power electronics.A large amount of distributed generation resource is linked into after distribution net side,
Due to its enormous amount, physics and electrical distance dispersion will certainly be to safe and stable, the high-quality and efficient operations of distribution net side
Bring tremendous influence.Relative to traditional synchronous generator, the sound of the distributed generation resource based on electronic power inverter interface
The rotatory inertia and damping component answered speed very fast, and itself there is no synchronous generator intrinsic, when being connect in electric system
When distributed generation resource as entering is excessive, the safe and stable operation of electric system is inherently threatened.
Parallel running is still for virtual synchronous generator (Virtual Synchronous Generator, referred to as VSG) at present
Based on the fixed sagging mechanism of conventional synchronization generator, without communication, but there is a problem of the shared difficulty of local message, so
Global information will be caused to obtain inconvenient, it is difficult to realize well interacting between VSG and power grid and synthetic operation.
Existing VSG stability contorting mainly pays close attention to the operation stability of single VSG from mechanical floor, less to consider from system perspective
Stable problem.After VSG accesses power grid, though inertial supports can be provided to system, the kinetic characteristics of system are also changed simultaneously,
And its degree of coupling with system is enhanced, so that system stability contorting is increasingly complex.Distributed generation resource is with VSG normalized form
After accessing power grid, though energy exchange can be carried out with power grid, and the ancillary services such as inertia, peak-frequency regulation is provided for system, be
The topological structure of system is after increasing number, the problem of equally existing difficult management.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of region reactive voltage control method for coordinating, device, terminal and depositing
Storage media, it is excessive to solve distributed generation resource of the access of electric system in the prior art based on electronic power inverter interface, certain
The problem of a power supply can threaten the safe and stable operation of electric system when breaking down.
According in a first aspect, the embodiment of the invention provides a kind of region reactive voltage control method for coordinating, comprising:
Obtain the voltage signal of more virtual synchronous generators;
It is that every virtual synchronous generator distributes reactive power according to the voltage signal of every virtual synchronous generator.
Optionally, the voltage signal for obtaining more virtual synchronous generators includes: to obtain every virtual synchronous generator
First output voltage,
Wherein, EsFor floating voltage, DqFor the sagging coefficient of reactive voltage, Q is reactive power output valve, KQFor Reactive-power control
Coefficient, QrefFor reactive power reference qref, E1=Es-DqQ is system primary voltage governing equation,For nothing
Function integration control equation.
Optionally, the voltage signal of more virtual synchronous generators is obtained further include: obtain every virtual synchronous generator
The second output voltage,
Wherein, EsFor floating voltage, DqFor the sagging coefficient of reactive voltage, Q is reactive power output valve, KQFor Reactive-power control
Coefficient, QrefFor reactive power reference qref, KvProportionality coefficient, U are controlled for voltagerefFor grid voltage reference value, U is network voltage
Actual value.
According to second aspect, the embodiment of the invention provides a kind of region reactive voltage cooperative control devices, comprising:
First obtains module, for obtaining the voltage signal of more virtual synchronous generators;
Distribution module, for being every virtual synchronous generator distribution according to the voltage signal of every virtual synchronous generator
Reactive power.
Optionally, the first acquisition module is also used to obtain first output voltage of every virtual synchronous generator,
Wherein, EsFor floating voltage, DqFor the sagging coefficient of reactive voltage, Q is reactive power output valve, KQFor Reactive-power control
Coefficient, QrefFor reactive power reference qref, E1=Es-DqQ is system primary voltage governing equation,For nothing
Function integration control equation.
Optionally, the first acquisition module is also used to obtain second output voltage of every virtual synchronous generator,
Wherein, EsFor floating voltage, DqFor the sagging coefficient of reactive voltage, Q is reactive power output valve, KQFor Reactive-power control
Coefficient, QrefFor reactive power reference qref, KvProportionality coefficient, U are controlled for voltagerefFor grid voltage reference value, U is network voltage
Actual value.
According to the third aspect, the embodiment of the invention provides a kind of region reactive voltage coordinated control terminals, comprising: at least
One processor;And the memory being connect at least one processor communication;Wherein, memory, which is stored with, to be handled by one
The instruction that device executes, instruction are executed by least one processor, are appointed so that at least one processor executes in above-mentioned first aspect
One region reactive voltage control method for coordinating.
According to fourth aspect, the embodiment of the invention provides a kind of computer readable storage medium, computer-readable storage
Media storage has computer instruction, and computer instruction is for making computer execute the idle electricity in region any in above-mentioned first aspect
Press control method for coordinating.
According to the 5th aspect, the embodiment of the invention provides a kind of computer program product, the computer program product
Including the computer program being stored on computer readable storage medium, the computer program includes program instruction, when described
When program instruction is computer-executed, the computer is made to execute any one embodiment of first aspect or first aspect
Described in region reactive voltage control method for coordinating.
A kind of region reactive voltage control method for coordinating and device of the embodiment of the present invention, have the following advantages:
1. a kind of region reactive voltage control method for coordinating, device, terminal and storage medium provided in an embodiment of the present invention,
Wherein method includes: the voltage signal for obtaining more virtual synchronous generators;According to the voltage of every virtual synchronous generator letter
Number reactive power is distributed for every virtual synchronous generator.△UkFor the output voltage of VSG and the difference of voltage rating;According to every
The voltage deviation signal △ U of platform VSGk, in conjunction with voltage deviation (the △ U of VSG other in power grid1, △ U2..., △ Uk-1), to being incorporated to
Every VSG of power grid carries out reactive power QkrefCoordinated allocation, be for based on the big system of power electronics novel electric power, changeable
Amount, the solution that is proposed of reactive power assignment problem of trans-regional more grid-connected virtual synchronous machines, thus overcome with
Toward the local defect for controlling local information sharing difficulty, considers that the system mode of neighboring area carries out decentralized coordinated control, obtain
The operation reserve of each VSG is realized from part to whole synthetic operation, avoids locally supplied power source too high or too low due to output power
And failure is generated, improve the safety and stability of electric system.
2. a kind of region reactive voltage control method for coordinating, device, terminal and storage medium provided in an embodiment of the present invention,
Wherein method further include: the first output voltage of every virtual synchronous generator is obtained,
Wherein, EsFor floating voltage, DqFor the sagging coefficient of reactive voltage, Q is reactive power output valve, KQFor Reactive-power control
Coefficient, QrefFor reactive power reference qref, E1=Es-DqQ is system primary voltage governing equation,For nothing
Function integration control equation.There are linear relationships with reactive power output valve Q by VSG output voltage E, therefore, to VSG output voltage E
Size carry out control and can change the size of reactive power output valve Q.By the output electricity for controlling the virtual synchronous generator
Pressure E adjusts the set end voltage and reactive power of the virtual synchronous generator, wherein set end voltage and reactive power size according to
Distribution is rationally arranged in the VSG operating condition in power grid and/or the region;Similarly, the virtual synchronous generator grid-connected to other
Reactive power distribution is carried out using aforesaid way, the stability of operation of power networks is improved from system level.
3. a kind of region reactive voltage control method for coordinating, device, terminal and storage medium provided in an embodiment of the present invention,
Wherein method further include: the second output voltage of every virtual synchronous generator is obtained,
Wherein, EsFor floating voltage, DqFor the sagging coefficient of reactive voltage, Q is reactive power output valve, KQFor Reactive-power control
Coefficient, QrefFor reactive power reference qref, KvProportionality coefficient, U are controlled for voltagerefFor grid voltage reference value, U is network voltage
Actual value.ΔUk=Uref- U sets UrefFor the load voltage value of VSG.It has increased voltage control loop section newly, nothing can be adjusted simultaneously
Function power and network voltage simplify the process of reactive power and network voltage distribution.
Detailed description of the invention
The features and advantages of the present invention will be more clearly understood by referring to the accompanying drawings, and attached drawing is schematically without that should manage
Solution is carries out any restrictions to the present invention, in the accompanying drawings:
Fig. 1 is a kind of flow chart of region reactive voltage control method for coordinating in the embodiment of the present invention;
Fig. 2 is a kind of system construction drawing of region reactive voltage coordinated control in the embodiment of the present invention;
Fig. 3 is a kind of functional block diagram of region reactive voltage control method for coordinating in the embodiment of the present invention;
Fig. 4 is the functional block diagram of another region reactive voltage control method for coordinating in the embodiment of the present invention;
Fig. 5 is a kind of trans-regional virtual synchronous generator of region reactive voltage cooperative control device in the embodiment of the present invention
Interconnection architecture figure;
Fig. 6 is a kind of structural schematic diagram of region reactive voltage cooperative control device in the embodiment of the present invention;
Fig. 7 is a kind of structural schematic diagram of region reactive voltage coordinated control terminal in the embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those skilled in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
As shown in Figure 1, the embodiment of the invention provides a kind of region reactive voltage control method for coordinating, comprising:
Step S1 obtains the voltage signal of more virtual synchronous generators.
In the present embodiment, as shown in Fig. 2, trans-regional more virtual synchronous generators are connected to the grid simultaneously, by every VSG
Voltage signal be passed to Communication Layer.Wherein voltage signal includes no-load emf, voltage rating and output voltage signal of VSG etc..
Step S2 is that every virtual synchronous generator distributes idle function according to the voltage signal of every virtual synchronous generator
Rate.
In the present embodiment, △ UkFor the output voltage of VSG and the difference of voltage rating, as shown in Fig. 2, according to every
The voltage deviation signal △ U of VSGk, in conjunction with voltage deviation (the △ U of VSG other in power grid1, △ U2..., △ Uk-1), to being incorporated to electricity
Every VSG of net carries out reactive power QkrefCoordinated allocation, be for based on the big system of power electronics novel electric power, changeable
Amount, the solution that is proposed of reactive power assignment problem of trans-regional more grid-connected virtual synchronous machines, thus overcome with
Toward the local defect for controlling local information sharing difficulty, considers that the system mode of neighboring area carries out decentralized coordinated control, obtain
The operation reserve of each VSG realizes from part to whole synthetic operation, avoids being abnormal due to some power supply of region, each point
Cloth power supply influences between each other and leads to electric network fault, improves the safety and stability of electric system.
As optional embodiment, step S1 includes the first output electricity for obtaining every virtual synchronous generator
Pressure,
Wherein, EsFor floating voltage, DqFor the sagging coefficient of reactive voltage, Q is reactive power output valve, KQFor Reactive-power control
Coefficient, QrefFor reactive power reference qref, E1=Es-DqQ is system primary voltage governing equation,For nothing
Function integration control equation.
In the present embodiment,For with droop characteristic virtual synchronous machine reactive voltage
Governing equation, wherein EsInverter zero load off-grid operation is characterized similar to the floating voltage of synchronous motor for floating voltage
When output end voltage.As shown in Figure 3, it can be seen that VSG output voltage E and reactive power output valve Q there are linear relationship, because
This, controls the size of VSG output voltage E the size that can change reactive power output valve Q.It is virtual same by controlling this
The output voltage E of generator is walked to adjust the set end voltage and reactive power of the virtual synchronous generator, wherein set end voltage and
Distribution is rationally arranged according to the VSG operating condition of power grid entirety and/or the region in reactive power;Similarly, grid-connected to other
Virtual synchronous generator also uses aforesaid way to carry out reactive voltage distribution, and the stabilization of operation of power networks is improved from system level
Property.
As optional embodiment, step S1 further includes the second output electricity for obtaining every virtual synchronous generator
Pressure,
Wherein, EsFor floating voltage, DqFor the sagging coefficient of reactive voltage, Q is reactive power output valve, KQFor Reactive-power control
Coefficient, QrefFor reactive power reference qref, KvProportionality coefficient, U are controlled for voltagerefFor grid voltage reference value, U is network voltage
Actual value.
In the present embodiment, Δ Uk=Uref- U sets UrefFor the load voltage value of VSG.Control virtual synchronous generator
The second output voltage circuit as shown in figure 4, having increased voltage control loop section newly, which is equivalent to synchronous generator
The output of the field regulator or automatic voltage regulator (Automatic Voltage Regulator, AVR) of machine, Neng Goutong
When adjust reactive power and network voltage, simplify the process of reactive power and network voltage distribution.
In a particular embodiment, the controller that can disperse to existing network system improve optimization, or directly with
The form of control module is applied individually to any in electric system.Specifically, Holistic modeling first is carried out to network system;To system entirety
Model is split, decoupling is handled;Controller is designed for Topical Dispersion system;The grid-connected end voltage of real-time monitoring, to virtual same
Step machine reactive power carries out online updating, so that system voltage be kept to stablize.As shown in figure 5, the VSG and its correspondence of area distribution
Local controller, establish correspondence, the reactive power of each VSG of coordinated control between each controller.By communicating hand
Section, realizes the identification of set end voltage, and in conjunction with the influence on system operation of periphery VSG, reactive power reference is distributed to after being computed optimization
Every virtual synchronous machine, makes better co-ordination between each, improves Network Voltage Stability, enhancing grid stability and reliable
Property, while there is the variation to system parameter and the method for operation to have very strong adaptivity.
On this basis, the non-linear and dynamic characteristics such as uncertain of system be may also be combined with, and utilize VSG control ginseng
The flexible adjustable feature of number, design stability controller is to improve system control operation stability.For this purpose, each VSG can be pressed by region
Range, amount of capacity carry out clustering, are divided into frequency modulation type VSG unit and non-frequency modulation type VSG unit, using centralized management, divide
Autonomous strategy is dissipated to be managed.In addition, each VSG can be also considered as to transaction agent, and according to generating capacity, inertia levels, city
Field price etc. is established VSG multi-agent Game model and distribution of interests rule, to realize each main body maximizing the benefits, is realized simultaneously
The efficient management of whole system.
And in research from now on, specific control method in addition to need to further improve VSG, such as unbalance control, grid-connected
The control methods such as presynchronization control, parallel connection circulation inhibition, also need to study the coordination control strategy between more VSG.Feasible thinking it
First is that use for reference micro-capacitance sensor operation control in act on behalf of distributed theory, VSG synthetic operation problem is changed into distributed AC servo system
Problem, and then from the distributed nature of VSG, propose VSG distribution operation control framework.In addition, also needing in research system
Operation problem under local restriction and global constraints, and use distributed optimization, quantum genetic algorithm, game theory etc.
Method is analyzed and is solved, and to obtain the operation reserve of each VSG, is realized from part to whole synthetic operation.
Second aspect of the embodiment of the present invention also provides a kind of region reactive voltage cooperative control device, the device for realizing
Above-described embodiment and preferred embodiment, the descriptions that have already been made will not be repeated.As used below, term " module " can
To realize the combination of the software and/or hardware of predetermined function.Although system described in following embodiment is preferably come with software
It realizes, but the realization of the combination of hardware or software and hardware is also that may and be contemplated.
As shown in fig. 6, the device includes: the first acquisition module 1, the voltage for obtaining more virtual synchronous generators is believed
Number;Distribution module 2 is used to be that every virtual synchronous generator distribution is idle according to the voltage signal of every virtual synchronous generator
Power.
The further function description of above-mentioned modules is identical as above-mentioned corresponding embodiment, repeats no more again.
Fig. 7 is a kind of structural schematic diagram of region reactive voltage coordinated control terminal provided in an embodiment of the present invention, comprising:
At least one processor 71;And the memory 72 with the communication connection of at least one processor 71;Wherein, memory 72 is stored with
The instruction that can be executed by a processor 71, instruction is executed by least one processor 71, so that at least one processor 71 is held
Any region reactive voltage control method for coordinating in row above-described embodiment.As shown in fig. 7, processor 71 and memory 72 can be with
It is connected by bus or other modes, in Fig. 7 for being connected by bus.
Processor 71 can be central processing unit (Central Processing Unit, CPU).Processor 71 can be with
For other general processors, digital signal processor (Digital Signal Processor, DSP), specific integrated circuit
(Application Specific Integrated Circuit, ASIC), field programmable gate array (Field-
Programmable Gate Array, FPGA) either other programmable logic device, discrete gate or transistor logic,
The combination of the chips such as discrete hardware components or above-mentioned all kinds of chips.
Memory 72 may include storing program area and storage data area, wherein storing program area can storage program area,
Application program required at least one function;It storage data area can the data etc. that are created of storage processor 71.In addition, storage
Device 72 may include high-speed random access memory, can also include non-transient memory, for example, at least a magnetic disk storage
Part, flush memory device or other non-transient solid-state memories.In some embodiments, it includes relative to place that memory 72 is optional
The remotely located memory of device 71 is managed, these remote memories can pass through network connection to processor 71.The reality of above-mentioned network
Example includes but is not limited to internet, intranet, local area network, mobile radio communication and combinations thereof.
One or more of modules are stored in the memory 72, when being executed by the processor 71, are executed
Region reactive voltage control method for coordinating in embodiment as shown in Figure 1.
Above-mentioned zone reactive voltage coordinated control terminal detail can correspond to embodiment referring to FIG. 1 to 5
In corresponding associated description and effect understood that details are not described herein again.
The embodiment of the invention also provides a kind of computer readable storage medium, computer-readable recording medium storage has meter
The instruction of calculation machine, the region reactive voltage control method for coordinating that computer instruction is used to that computer to be made to execute above-mentioned any embodiment.
It is that can lead to it will be understood by those skilled in the art that realizing all or part of the process in above-described embodiment method
Computer program is crossed to instruct relevant hardware and complete, the program can be stored in a computer-readable storage medium
In, the program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, the storage medium can for magnetic disk,
CD, read-only memory (Read-Only Memory, ROM), random access memory (Random Access
Memory, RAM), flash memory (Flash Memory), hard disk (Hard Disk Drive, abbreviation: HDD) or solid state hard disk
(Solid-State Drive, SSD) etc.;The storage medium can also include the combination of the memory of mentioned kind.
Although being described in conjunction with the accompanying the embodiment of the present invention, those skilled in the art can not depart from the present invention
Spirit and scope in the case where various modifications and variations can be made, such modifications and variations are each fallen within by appended claims institute
Within the scope of restriction.