CN108551164A - A kind of direct-current grid Voltage Stability Control method and apparatus - Google Patents
A kind of direct-current grid Voltage Stability Control method and apparatus Download PDFInfo
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- CN108551164A CN108551164A CN201810231367.2A CN201810231367A CN108551164A CN 108551164 A CN108551164 A CN 108551164A CN 201810231367 A CN201810231367 A CN 201810231367A CN 108551164 A CN108551164 A CN 108551164A
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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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
The present invention relates to a kind of direct-current grid Voltage Stability Control method and apparatus, the method includes：The target power output quantity that distributed generation resource is determined according to the cost tiny increment of distributed generation resource adjusts the power that the distributed generation resource injects direct-current grid using the target power output quantity of the distributed generation resource.The present invention provides a kind of direct-current grid Voltage Stability Control method, the purpose is to be not necessarily to configure micro-capacitance sensor central controller, direct-current grid is controlled using full distributed control method and realizes that optimal power is shared using the Collaborative Control between adjacent distributions formula power supply, improve the utilization rate of regenerative resource, equal incremental principle and consistency algorithm are combined and introduce object function to calculate the target power output quantity of distributed generation resource, system cost of electricity-generating is reduced on the basis of the stabilization and power-balance of realization micro-grid system busbar voltage.
Description
Technical field
The present invention relates to direct-current grid scheduling fields, and in particular to a kind of direct-current grid Voltage Stability Control method and
Device.
Background technology
Micro-capacitance sensor is a kind of that distributed generator, load, energy-storage system, current transformer and monitoring and protecting device is organic whole
What is be combined small-sized is transported to electric cluster.Micro-capacitance sensor can be divided into exchange micro-capacitance sensor and direct-current grid two types.Compared to
Micro-capacitance sensor is exchanged, direct-current grid has the characteristics that at low cost, operational efficiency is high, control is simple.With a large amount of DC loads
It emerges in large numbers, the importance and necessity of direct-current grid has obtained extensive concern.
Currently, there are mainly two types of methods for direct-current grid DC bus-bar voltage stability contorting：It is centralized and distributed.It concentrates
Formula control program needs that micro-capacitance sensor central controller is arranged, and micro-capacitance sensor central controller is by acquiring all generator units and load
Information, and after complicated calculation processing, control instruction is sent to controlled cell, realizes the control targe of system.This control
The communication network that mode processed needs is extremely huge, complex and high cost high, while in communication failure or communicating not in time
In the case of, system, which can not be made, timely and effectively reacts, and influences system security reliability.
Invention content
The present invention provides a kind of direct-current grid Voltage Stability Control method and apparatus, and the purpose is to be not necessarily to configure micro-capacitance sensor
Central controller controls direct-current grid using full distributed control method and utilizes the Collaborative Control between adjacent distributions formula power supply
It realizes that optimal power is shared, improves the utilization rate of regenerative resource, using consistency algorithm and introduces object function and count
The target power output quantity of distributed generation resource is calculated, is dropped on the basis of the stabilization and power-balance of realization micro-grid system busbar voltage
Low system cost of electricity-generating.
The purpose of the present invention is what is realized using following technical proposals：
A kind of direct-current grid Voltage Stability Control method, it is improved in that including：
The target power output quantity of distributed generation resource is determined according to the cost tiny increment of distributed generation resource；
The distributed generation resource, which is adjusted, using the target power output quantity of the distributed generation resource injects direct-current grid
Power.
Preferably, the cost tiny increment according to distributed generation resource determines the target power output quantity of distributed generation resource,
Including：
According to the cost tiny increment of distributed generation resource, determine that i-th of distributed generation resource exists using consistency algorithm as the following formula
The target power output quantity P of kth time sampling instanti(k)：
In above formula, i ∈ [1, N], N are the total quantity of distributed generation resource, j ∈ [1, ni],niFor with i-th of distributed generation resource
The total quantity of adjacent distributed generation resource, k are sampling instant, Pi(k) it is i-th distributed generation resource in kth time sampling instant
Target power output quantity, Pi(k-1) be i-th of distributed generation resource in the target power output quantity of -1 sampling instant of kth, δiFor
For i-th of distributed generation resource in the downsampling factor of kth time sampling instant, Δ t is kth time -1 sampling instant of sampling instant and kth
Time difference,For direct-current grid kth time sampling instant object function；For i-th of distributed generation resource
In the cost tiny increment of kth time sampling instant,For i-th of distributed generation resource -1 sampling instant of kth cost
Tiny increment.
Further, the cost tiny increment of the distributed generation resource is determined as the following formula：
In above formula, αi、βi、γiFor the coefficient of the cost of electricity-generating of i-th of distributed generation resource, PiFor i-th of distributed generation resource
Output power, Pi maxFor the upper limit of the output power of i-th of distributed generation resource, Pi minFor the output work of i-th of distributed generation resource
The lower limit of rate,For the parameter of the upper and lower bound of the output power of i-th of distributed generation resource.
Further, determine as the following formula the direct-current grid kth time sampling instant object function：
In above formula, Δ P (k) is power adaptation amount of the direct-current grid in kth time sampling instant, εiFor direct-current grid work(
Coefficient when rate balances, μiIt is the coefficient that busbar voltage is stablized,For busbar voltage nominal value, VDC(k) it is kth time sampling instant
Bus voltage measurement value.
Further, determine as the following formula the direct-current grid kth time sampling instant power adaptation amount：
In above formula, C is the capacitance of the equivalent capacity of direct-current grid, VDC(k-1) table is divided to represent in -1 sampling instant of kth
Bus voltage measurement value.
Preferably, the target power output quantity using the distributed generation resource adjusts the distributed generation resource and injects directly
The power of micro-capacitance sensor is flowed, including：
The distributed generation resource, which is controlled, using DC/DC the or AC/DC current transformers of distributed generation resource injects direct-current grid
Power is target power output quantity P of i-th of distributed generation resource in kth time sampling instanti(k), if i-th of distributed generation resource exists
The target power output quantity P of kth time sampling instanti(k) meet | Pi(k)-Pi(k-1) |≤0.1 and maintain 2 seconds, then stop updating
Target output.
A kind of direct-current grid Voltage Stability Control device, it is improved in that described device includes：
Determination unit, for determining that the target power of distributed generation resource is exported according to the cost tiny increment of distributed generation resource
Amount；
Unit is adjusted, is injected for adjusting the distributed generation resource using the target power output quantity of the distributed generation resource
The power of direct-current grid.
Further, the determination unit, including：
Determining module is determined i-th using consistency algorithm as the following formula for the cost tiny increment according to distributed generation resource
Target power output quantity P of the distributed generation resource in kth time sampling instanti(k)：
In above formula, i ∈ [1, N], N are the total quantity of distributed generation resource, j ∈ [1, ni],niFor with i-th of distributed generation resource
The total quantity of adjacent distributed generation resource, k are sampling instant, Pi(k) it is i-th distributed generation resource in kth time sampling instant
Target power output quantity, Pi(k-1) be i-th of distributed generation resource in the target power output quantity of -1 sampling instant of kth, δiFor
For i-th of distributed generation resource in the downsampling factor of kth time sampling instant, Δ t is kth time -1 sampling instant of sampling instant and kth
Time difference,For direct-current grid kth time sampling instant object function；For i-th of distributed generation resource
In the cost tiny increment of kth time sampling instant,For i-th of distributed generation resource -1 sampling instant of kth cost
Tiny increment.
Further, the cost tiny increment of the distributed generation resource is determined as the following formula：
In above formula, αi、βi、γiFor the coefficient of the cost of electricity-generating of i-th of distributed generation resource, PiFor i-th of distributed generation resource
Output power, Pi maxFor the upper limit of the output power of i-th of distributed generation resource, Pi minFor the output work of i-th of distributed generation resource
The lower limit of rate,For the parameter of the upper and lower bound of the output power of i-th of distributed generation resource.
Further, determine as the following formula the direct-current grid kth time sampling instant object function：
In above formula, Δ P (k) is power adaptation amount of the direct-current grid in kth time sampling instant, εiFor direct-current grid work(
Coefficient when rate balances, μiIt is the coefficient that busbar voltage is stablized,For busbar voltage nominal value, VDC(k) when being sampled for kth time
The bus voltage measurement value at quarter.
Further, determine as the following formula the direct-current grid kth time sampling instant power adaptation amount：
In above formula, C is the capacitance of the equivalent capacity of direct-current grid, VDC(k-1) table is divided to represent in -1 sampling instant of kth
Bus voltage measurement value.
Preferably, the adjusting unit, including：
Control module is injected for controlling the distributed generation resource using DC/DC the or AC/DC current transformers of distributed generation resource
The power of direct-current grid is target power output quantity P of i-th of distributed generation resource in kth time sampling instanti(k), if i-th
Target power output quantity P of the distributed generation resource in kth time sampling instanti(k) meet | Pi(k)-Pi(k-1) |≤0.1 and maintenance 2
Second, then stop updating target output.
Beneficial effects of the present invention：
Technical solution provided by the invention, by the mesh for determining distributed generation resource according to the cost tiny increment of distributed generation resource
Horsepower output is marked, adjusting the distributed generation resource using the target power output quantity of the distributed generation resource injects DC micro-electric
The power of net just can be not necessarily to configure micro-capacitance sensor central controller, effectively avoid circuit Single Point of Faliure, improve direct-current grid
Operational reliability；
Technical solution provided by the invention, by introducing object function Qi* (k) calculates the target power of distributed generation resource
It is when output quantity, current sample time and the target power output quantity of last sampling instant meet consistency algorithm requirement, then real
Showed micro-grid system busbar voltage stabilization and power-balance on the basis of reduce system cost of electricity-generating；On the other hand, pass through
The power that the distributed generation resource injection direct-current grid is adjusted using the target power output quantity of the distributed generation resource is this
Full distributed control method controls direct-current grid, realizes that optimal power is total using the Collaborative Control between adjacent distributions formula power supply
It enjoys, improves the utilization rate of regenerative resource.
Description of the drawings
Fig. 1 is a kind of flow chart of direct-current grid Voltage Stability Control method of the present invention；
Fig. 2 is a kind of application scenarios schematic diagram of direct-current grid Voltage Stability Control method in the embodiment of the present invention；
Fig. 3 is a kind of direct-current grid busbar voltage of direct-current grid Voltage Stability Control method in the embodiment of the present invention
Simplified equivalent model schematic diagram；
Fig. 4 is a kind of structural schematic diagram of direct-current grid Voltage Stability Control device of the present invention.
Specific implementation mode
It elaborates below in conjunction with the accompanying drawings to the specific implementation mode of the present invention.
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 of ordinary skill in the art
The all other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
A kind of direct-current grid Voltage Stability Control method provided by the invention, as shown in Figure 1, including：
101. determining the target power output quantity of distributed generation resource according to the cost tiny increment of distributed generation resource；
102. adjusting the distributed generation resource using the target power output quantity of the distributed generation resource injects DC micro-electric
The power of net.
Further, the step 101, including：
According to the cost tiny increment of distributed generation resource, determine that i-th of distributed generation resource exists using consistency algorithm as the following formula
The target power output quantity P of kth time sampling instanti(k)：
In above formula, i ∈ [1, N], N are the total quantity of distributed generation resource, j ∈ [1, ni],niFor with i-th of distributed generation resource
The total quantity of adjacent distributed generation resource, k are sampling instant, Pi(k) it is i-th distributed generation resource in kth time sampling instant
Target power output quantity, Pi(k-1) be i-th of distributed generation resource in the target power output quantity of -1 sampling instant of kth, δiFor
For i-th of distributed generation resource in the downsampling factor of kth time sampling instant, Δ t is kth time -1 sampling instant of sampling instant and kth
Time difference,For direct-current grid kth time sampling instant object function；For i-th of distributed generation resource
In the cost tiny increment of kth time sampling instant,For i-th of distributed generation resource -1 sampling instant of kth cost
Tiny increment.
Specifically, determining the cost tiny increment of the distributed generation resource as the following formula：
In above formula, αi、βi、γiFor the coefficient of the cost of electricity-generating of i-th of distributed generation resource, PiFor i-th of distributed generation resource
Output power, Pi maxFor the upper limit of the output power of i-th of distributed generation resource, Pi minFor the output work of i-th of distributed generation resource
The lower limit of rate,For the parameter of the upper and lower bound of the output power of i-th of distributed generation resource.
Specifically, determine as the following formula the direct-current grid kth time sampling instant object function：
In above formula, Δ P (k) is power adaptation amount of the direct-current grid in kth time sampling instant, εiFor direct-current grid work(
Coefficient when rate balances, μiIt is the coefficient that busbar voltage is stablized,For busbar voltage nominal value, VDC(k) when being sampled for kth time
The bus voltage measurement value at quarter.
Wherein, determine as the following formula the direct-current grid kth time sampling instant power adaptation amount：
In above formula, C is the capacitance of the equivalent capacity of direct-current grid, VDC(k-1) table is divided to represent in -1 sampling instant of kth
Bus voltage measurement value.
Further, after the target power output quantity for obtaining distributed generation resource, the step 102, including：
The distributed generation resource, which is controlled, using DC/DC the or AC/DC current transformers of distributed generation resource injects direct-current grid
Power is target power output quantity P of i-th of distributed generation resource in kth time sampling instanti(k), if i-th of distributed generation resource exists
The target power output quantity P of kth time sampling instanti(k) meet | Pi(k)-Pi(k-1) |≤0.1 and maintain 2 seconds, then stop updating
Target output.
For example, as shown in Fig. 2, the network topology structure of electric network information physical system passes through multiple multiagent systems
(Agent) it is combined together, each Agent is made of two parts of processor and communicator.Processor is responsible for control method
The transmission of operation and control instruction.Controller will monitor the fortune of local physical equipment in real time while receiving external discrete signal
Row state and the local physical message (including voltage, electric current etc.) of sampling, secondly, controller need the information to being collected into according to
The rule of setting carries out processing and sends control instruction to local device, ensures the operation of entire micro-grid system precise and high efficiency,
In addition, using point-to-point weak communication mode that can communicate neighboring units with unrestricted choice, even two distributed generation resources can lead to
Letter, then the two distributed generation resources are adjacent.
It includes regenerative resource distributed generation resource (including photovoltaic system and wind power generating set etc.) to set in micro-capacitance sensor
With traditional distributed power supply；K is sampling instant, and sampling instant value is 0.1 second.
According to the cost tiny increment of distributed generation resource, determine that i-th of distributed generation resource exists using consistency algorithm as the following formula
The target power output quantity P of kth time sampling instanti(k)：
In above formula, i ∈ [1, N], N are the total quantity of distributed generation resource, j ∈ [1, ni],niFor with i-th of distributed generation resource
The total quantity of adjacent distributed generation resource, k are sampling instant, Pi(k) it is i-th distributed generation resource in kth time sampling instant
Target power output quantity, Pi(k-1) be i-th of distributed generation resource in the target power output quantity of -1 sampling instant of kth, δiFor
For i-th of distributed generation resource in the downsampling factor of kth time sampling instant, Δ t is kth time -1 sampling instant of sampling instant and kth
Time difference,For direct-current grid kth time sampling instant object function；For i-th of distributed generation resource
In the cost tiny increment of kth time sampling instant,For i-th of distributed generation resource -1 sampling instant of kth cost
Tiny increment.
Specifically, determining the cost tiny increment of the distributed generation resource as the following formula：
In above formula, αi、βi、γiFor the coefficient of the cost of electricity-generating of i-th of distributed generation resource, PiFor i-th of distributed generation resource
Output power, Pi maxFor the upper limit of the output power of i-th of distributed generation resource, Pi minFor the output work of i-th of distributed generation resource
The lower limit of rate,For the parameter of the upper and lower bound of the output power of i-th of distributed generation resource, enableOnly when i-th
The output power P of distributed generation resourceiMeet Pi min＜ Pi＜ Pi max, above-mentioned formula just it is significant.
Wherein, determine as the following formula the direct-current grid kth time sampling instant object function：
In above formula, Δ P (k) is power adaptation amount of the direct-current grid in kth time sampling instant；εiFor direct-current grid work(
Coefficient when rate balances, μiIt is the coefficient that busbar voltage is stablized, enables εi=0.01, μi=0.02；For busbar voltage nominal value,
VDC(k) it is the bus voltage measurement value of kth time sampling instant.
Fig. 3 shows direct-current grid busbar voltage Simplified equivalent model schematic diagram, and following relationship can be learnt by Fig. 3：
In above formula, PDGFor the total power value that distributed generation resource in direct-current grid provides, PESSFor energy storage in direct-current grid
The total power value that device provides, PloadFor load aggregate demand, P in direct-current gridlossFor circuit total losses in direct-current grid.
Above formula discretization is obtained：
In above formula, C is the capacitance of the equivalent capacity of direct-current grid, VDC(k-1) table is divided to represent in -1 sampling instant of kth
Bus voltage measurement value.
Further, obtain distributed generation resource target power output quantity after, using distributed generation resource DC/DC or
The power that AC/DC current transformers control the distributed generation resource injection direct-current grid is i-th of distributed generation resource in kth time sampling
The target power output quantity P at momenti(k), if i-th of distributed generation resource kth time sampling instant target power output quantity Pi
(k) meet | Pi(k)-Pi(k-1) |≤0.1 and maintain 2 seconds, then stop update target output.
When | Pi(k)-Pi(k-1) | when≤0.1, the target power output quantity Pi(k) it reaches unanimity, direct-current grid
The total power production cost of distributed generation resource is minimum, i.e.,The power of direct-current grid reaches balance, i.e.,
Busbar voltage keeps relative stability, i.e.,Object functionConverge on zero.
Wherein, determine as the following formula i-th of distributed generation resource kth time sampling instant cost of electricity-generating
The present invention also provides a kind of direct-current grid Voltage Stability Control devices, as shown in figure 4, described device includes：
Determination unit, for determining that the target power of distributed generation resource is exported according to the cost tiny increment of distributed generation resource
Amount；
Unit is adjusted, is injected for adjusting the distributed generation resource using the target power output quantity of the distributed generation resource
The power of direct-current grid.
Further, the determination unit, including：
Determining module is determined i-th using consistency algorithm as the following formula for the cost tiny increment according to distributed generation resource
Target power output quantity P of the distributed generation resource in kth time sampling instanti(k)：
In above formula, i ∈ [1, N], N are the total quantity of distributed generation resource, j ∈ [1, ni],niFor with i-th of distributed generation resource
The total quantity of adjacent distributed generation resource, k are sampling instant, Pi(k) it is i-th distributed generation resource in kth time sampling instant
Target power output quantity, Pi(k-1) be i-th of distributed generation resource in the target power output quantity of -1 sampling instant of kth, δiFor
For i-th of distributed generation resource in the downsampling factor of kth time sampling instant, Δ t is kth time -1 sampling instant of sampling instant and kth
Time difference,For direct-current grid kth time sampling instant object function；For i-th of distributed generation resource
In the cost tiny increment of kth time sampling instant,For i-th of distributed generation resource -1 sampling instant of kth cost
Tiny increment.
Specifically, determining the cost tiny increment of the distributed generation resource as the following formula：
In above formula, αi、βi、γiFor the coefficient of the cost of electricity-generating of i-th of distributed generation resource, PiFor i-th of distributed generation resource
Output power, Pi maxFor the upper limit of the output power of i-th of distributed generation resource, Pi minFor the output work of i-th of distributed generation resource
The lower limit of rate,For the parameter of the upper and lower bound of the output power of i-th of distributed generation resource.
Specifically, determine as the following formula the direct-current grid kth time sampling instant object function：
In above formula, Δ P (k) is power adaptation amount of the direct-current grid in kth time sampling instant, εiFor direct-current grid work(
Coefficient when rate balances, μiIt is the coefficient that busbar voltage is stablized,For busbar voltage nominal value, VDC(k) when being sampled for kth time
The bus voltage measurement value at quarter.
Wherein, determine as the following formula the direct-current grid kth time sampling instant power adaptation amount：
In above formula, C is the capacitance of the equivalent capacity of direct-current grid, VDC(k-1) table is divided to represent in -1 sampling instant of kth
Bus voltage measurement value.
Further, after the target power output quantity for obtaining distributed generation resource, the adjusting unit, including：
Control module is injected for controlling the distributed generation resource using DC/DC the or AC/DC current transformers of distributed generation resource
The power of direct-current grid is target power output quantity P of i-th of distributed generation resource in kth time sampling instanti(k), if i-th
Target power output quantity P of the distributed generation resource in kth time sampling instanti(k) meet | Pi(k)-Pi(k-1) |≤0.1 and maintenance 2
Second, then stop updating target output.
It should be understood by those skilled in the art that, embodiments herein can be provided as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, the application can be used in one or more wherein include computer usable program code computer
The computer program production implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
The form of product.
The application is with reference to method, the flow of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that can be realized by computer program instructions every first-class in flowchart and/or the block diagram
The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided
Instruct the processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine so that the instruction executed by computer or the processor of other programmable data processing devices is generated for real
The device for the function of being specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that instruction generation stored in the computer readable memory includes referring to
Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device so that count
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, in computer or
The instruction executed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Finally it should be noted that：The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, to the greatest extent
Invention is explained in detail with reference to above-described embodiment for pipe, those of ordinary skills in the art should understand that：Still
The specific implementation mode of the present invention can be modified or replaced equivalently, and without departing from any of spirit and scope of the invention
Modification or equivalent replacement should all cover within the claims of the present invention.
Claims (12)
1. a kind of direct-current grid Voltage Stability Control method, which is characterized in that the method includes：
The target power output quantity of distributed generation resource is determined according to the cost tiny increment of distributed generation resource；
The power that the distributed generation resource injects direct-current grid is adjusted using the target power output quantity of the distributed generation resource.
2. the method as described in claim 1, which is characterized in that described determined according to the cost tiny increment of distributed generation resource is distributed
The target power output quantity of formula power supply, including：
According to the cost tiny increment of distributed generation resource, determine i-th of distributed generation resource in kth time using consistency algorithm as the following formula
The target power output quantity P of sampling instanti(k)：
In above formula, i ∈ [1, N], N are the total quantity of distributed generation resource, j ∈ [1, ni],niIt is adjacent with i-th of distributed generation resource
Distributed generation resource total quantity, k is sampling instant, Pi(k) it is target of i-th of distributed generation resource in kth time sampling instant
Horsepower output, Pi(k-1) be i-th of distributed generation resource in the target power output quantity of -1 sampling instant of kth, δiIt is i-th
For distributed generation resource in the downsampling factor of kth time sampling instant, Δ t is the time of kth time -1 sampling instant of sampling instant and kth
Difference,For direct-current grid kth time sampling instant object function；It is that i-th of distributed generation resource is secondary in kth
The cost tiny increment of sampling instant,For i-th of distributed generation resource -1 sampling instant of kth cost tiny increment.
3. method as claimed in claim 2, which is characterized in that determine the cost tiny increment of the distributed generation resource as the following formula：
In above formula, αi、βi、γiFor the coefficient of the cost of electricity-generating of i-th of distributed generation resource, PiFor the output of i-th of distributed generation resource
Power, Pi maxFor the upper limit of the output power of i-th of distributed generation resource, Pi minUnder output power for i-th of distributed generation resource
Limit,For the parameter of the upper and lower bound of the output power of i-th of distributed generation resource.
4. method as claimed in claim 2, which is characterized in that determine the direct-current grid in kth time sampling as the following formula
The object function at quarter：
In above formula, Δ P (k) is power adaptation amount of the direct-current grid in kth time sampling instant, εiIt is flat for direct-current grid power
Coefficient when weighing apparatus, μiIt is the coefficient that busbar voltage is stablized,For busbar voltage nominal value, VDC(k) it is the mother of kth time sampling instant
Line voltage measurement value.
5. method as claimed in claim 4, which is characterized in that determine the direct-current grid in kth time sampling as the following formula
The power adaptation amount at quarter：
In above formula, C is the capacitance of the equivalent capacity of direct-current grid, VDC(k-1) table is divided to represent the mother in -1 sampling instant of kth
Line voltage measurement value.
6. the method as described in claim 1, which is characterized in that the target power output quantity using the distributed generation resource
The power of the distributed generation resource injection direct-current grid is adjusted, including：
The power that the distributed generation resource injects direct-current grid is controlled using DC/DC the or AC/DC current transformers of distributed generation resource
For i-th of distributed generation resource kth time sampling instant target power output quantity Pi(k), if i-th of distributed generation resource is in kth
The target power output quantity P of secondary sampling instanti(k) meet | Pi(k)-Pi(k-1) |≤0.1 and maintain 2 seconds, then stop update mesh
Mark output power.
7. a kind of direct-current grid Voltage Stability Control device, which is characterized in that described device includes：
Determination unit, the target power output quantity for determining distributed generation resource according to the cost tiny increment of distributed generation resource；
Unit is adjusted, injects direct current for adjusting the distributed generation resource using the target power output quantity of the distributed generation resource
The power of micro-capacitance sensor.
8. device as claimed in claim 7, which is characterized in that the determination unit, including：
Determining module determines i-th of distribution using consistency algorithm as the following formula for the cost tiny increment according to distributed generation resource
Target power output quantity P of the formula power supply in kth time sampling instanti(k)：
In above formula, i ∈ [1, N], N are the total quantity of distributed generation resource, j ∈ [1, ni],niIt is adjacent with i-th of distributed generation resource
Distributed generation resource total quantity, k is sampling instant, Pi(k) it is target of i-th of distributed generation resource in kth time sampling instant
Horsepower output, Pi(k-1) be i-th of distributed generation resource in the target power output quantity of -1 sampling instant of kth, δiIt is i-th
For distributed generation resource in the downsampling factor of kth time sampling instant, Δ t is the time of kth time -1 sampling instant of sampling instant and kth
Difference,For direct-current grid kth time sampling instant object function；It is that i-th of distributed generation resource is secondary in kth
The cost tiny increment of sampling instant,For i-th of distributed generation resource -1 sampling instant of kth cost tiny increment.
9. device as claimed in claim 8, which is characterized in that determine the cost tiny increment of the distributed generation resource as the following formula：
In above formula, αi、βi、γiFor the coefficient of the cost of electricity-generating of i-th of distributed generation resource, PiFor the output of i-th of distributed generation resource
Power, Pi maxFor the upper limit of the output power of i-th of distributed generation resource, Pi minUnder output power for i-th of distributed generation resource
Limit,For the parameter of the upper and lower bound of the output power of i-th of distributed generation resource.
10. device as claimed in claim 8, which is characterized in that determine the direct-current grid in kth time sampling as the following formula
The object function at quarter：
In above formula, Δ P (k) is power adaptation amount of the direct-current grid in kth time sampling instant, εiIt is flat for direct-current grid power
Coefficient when weighing apparatus, μiIt is the coefficient that busbar voltage is stablized,For busbar voltage nominal value, VDC(k) it is kth time sampling instant
Bus voltage measurement value.
11. device as claimed in claim 10, which is characterized in that determine the direct-current grid in kth time sampling as the following formula
The power adaptation amount at moment：
In above formula, C is the capacitance of the equivalent capacity of direct-current grid, VDC(k-1) table is divided to represent the mother in -1 sampling instant of kth
Line voltage measurement value.
12. device as claimed in claim 7, which is characterized in that the adjusting unit, including：
Control module injects direct current for controlling the distributed generation resource using DC/DC the or AC/DC current transformers of distributed generation resource
The power of micro-capacitance sensor is target power output quantity P of i-th of distributed generation resource in kth time sampling instanti(k), if i-th of distribution
Target power output quantity P of the formula power supply in kth time sampling instanti(k) meet | Pi(k)-Pi(k-1) |≤0.1 and maintain 2 seconds, then
Stop update target output.
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| CN105140936A (en) * | 2015-10-12 | 2015-12-09 | 贵州电网公司信息通信分公司 | Micro-grid frequency modulation control method with lowest power generation cost |
| US20160072290A1 (en) * | 2013-06-28 | 2016-03-10 | Korea Electric Power Corporation | Apparatus and method for operating distributed generator in connection with power system |
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| US20160072290A1 (en) * | 2013-06-28 | 2016-03-10 | Korea Electric Power Corporation | Apparatus and method for operating distributed generator in connection with power system |
| CN105140936A (en) * | 2015-10-12 | 2015-12-09 | 贵州电网公司信息通信分公司 | Micro-grid frequency modulation control method with lowest power generation cost |
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| CN111030075A (en) * | 2019-11-26 | 2020-04-17 | 深圳供电局有限公司 | Control method of direct current power supply and distribution system |
| CN111030075B (en) * | 2019-11-26 | 2022-03-22 | 深圳供电局有限公司 | Control method of direct current power supply and distribution system |
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