CN107546771B - High proportion wind-light storage accesses power distribution network multi-mode self-adaptive control method - Google Patents
High proportion wind-light storage accesses power distribution network multi-mode self-adaptive control method Download PDFInfo
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Abstract
The present invention provides a kind of high proportion wind-light storage access power distribution network multi-mode self-adaptive control method, which comprises obtains photovoltaic active power of output Ppv, wind turbine power generation output power Pwd, load active power Pl, photovoltaic output voltage Upv, photovoltaic output frequency Fpv；According to photovoltaic active power of output Ppv, wind turbine power generation output power Pwd, load active power Pl, photovoltaic output voltage UpvWith photovoltaic output frequency FpvFirm power tracing control mode is adaptive selected according to preset condition, network voltage frequency auxiliary control model, actively from cutting-in control mode and energy storage auxiliary one of cutting-in control mode power grid is controlled.High proportion wind-light storage provided by the invention accesses power distribution network multi-mode self-adaptive control method; pass through the different operating statuses according to power grid; select corresponding control model; smooth switching control mode when power grid being enable to break down; avoid shutdown; make operate power grid when it is more steady, improve the reliability and safety of power grid.
Description
Technical field
The present invention relates to technical field of electric power more particularly to a kind of high proportion wind-light storage to access power distribution network multi-mode self-adaptive
Control method.
Background technique
From the point of view of the energy strategy planning of country, China's electric system will be sent out energetically within the current and future long period
Extensive high proportion renewable energy is opened up, realizes distributed generation resource in terms of power distribution network access.With distribution network automated and intelligence
How renewable energy is effectively organized and is distributed to use, it appears particularly important by the development of energyization.
In the prior art, distributed power generation mostly uses the control technology based on power electronics, and system is caused to be different from tradition
There are power grid more power supplys, stochastic volatility to impact, trend distribution size direction is changeable, reactive voltage support dies down, system is equivalent
Rotary inertia such as reduces at the features, the relatively traditional bulk power grid of operation characteristic there is normal condition, Optimal State, risk status,
The various states such as the various states such as malfunction and recovery state and be incorporated into the power networks, electric network fault when isolated operation, restore it is grid-connected,
A variety of operations such as load increase and decrease.The operation of electric system is that have that certain pattern is governed, by the load prediction of different time grade, by
Unit Combination, advanced scheduling, on-line scheduling and real-time control etc. carry out mode superposition by different time level, realize distributed
Power grid control.Photovoltaic is fitful power, and reliability and predictability are poor, as fitful power penetrates power
Continuous improvement, but the prior art still uses single control model.
Single control model in the prior art, in the grid-connected in the process due to by wind-power electricity generation wave of photovoltaic generating system
The influence for situations such as dynamic, energy storage is from grid-connected, failure and recovery makes electric system generate biggish oscillation, when abnormal feelings occurs in power grid
When condition leads to failure, can only maintenance down, be unable to the grid-connected complicated transient process of smooth control distributed generation resource, be not able to satisfy distribution
Net space, Time And Event characteristic determine the diversity requirement of operating status, and the reliability of system and safety are lower.
Summary of the invention
(1) technical problems to be solved
The object of the present invention is to provide a kind of high proportion wind-light storages to access power distribution network multi-mode self-adaptive control method, solves
Cause to shut down and operate power grid when power grid breaks down in the prior art and vibrates larger technical problem.
(2) technical solution
In order to solve the above-mentioned technical problem, on the one hand, the present invention provides a kind of high proportion wind-light storage access power distribution network multimode
Formula self-adaptation control method, comprising:
Obtain photovoltaic active power of output Ppv, wind turbine power generation output power Pwd, load active power Pl, photovoltaic output voltage
Upv, photovoltaic output frequency Fpv；
According to the photovoltaic active power of output Ppv, the wind turbine power generation output power Pwd, the load active power Pl、
The photovoltaic output voltage UpvWith the photovoltaic output frequency FpvFirm power tracking control is adaptive selected according to preset condition
Molding formula, network voltage frequency assist control model, actively from cutting-in control mode and energy storage auxiliary cutting-in control mode
A kind of pair of power grid controls.
Further, when the preset condition is photovoltaic active power of output PpvWith wind turbine power generation output power PwdThe sum of
Less than or equal to zero, and power grid is in normal condition, and photovoltaic output voltage UpvGreater than photovoltaic output voltage lower limit Umin, and photovoltaic
Output frequency FpvBetween photovoltaic output frequency lower limit FminWith photovoltaic output frequency upper limit FmaxBetween when, select firm power tracking
Control model controls power grid.
Further, when the preset condition is photovoltaic active power of output PpvWith wind turbine power generation output power PwdThe sum of
Less than or equal to zero, and power grid is in normal condition, and photovoltaic output voltage UpvLess than or equal to photovoltaic output voltage lower limit UminWhen,
Or work as photovoltaic active power of output PpvWith wind turbine power generation output power PwdThe sum of be less than or equal to zero, and power grid is in normal shape
State, and photovoltaic output voltage UpvGreater than photovoltaic output voltage lower limit Umin, and photovoltaic output frequency FpvNot in photovoltaic output frequency
Lower limit FminWith photovoltaic output frequency upper limit FmaxBetween when, or work as photovoltaic active power of output PpvWith wind turbine power generation output power
PwdThe sum of be greater than zero, and photovoltaic active power of output PpvWith wind turbine power generation output power PwdThe sum of be less than or equal to load wattful power
Rate Pl, and photovoltaic output voltage UpvGreater than photovoltaic output voltage limit Umax, and when power grid is in normal condition, select power grid electricity
Voltage-frequency rate auxiliary control model controls power grid.
Further, when the preset condition is photovoltaic active power of output PpvWith wind turbine power generation output power PwdThe sum of
Less than or equal to zero, and when power grid is in malfunction, or work as photovoltaic active power of output PpvWith wind turbine power generation output power Pwd
The sum of be greater than zero, and photovoltaic active power of output PpvWith wind turbine power generation output power PwdThe sum of be less than or equal to load active power
Pl, and photovoltaic output voltage UpvGreater than photovoltaic output voltage limit Umax, and when power grid is in malfunction, selection is actively from simultaneously
Net control model controls power grid.
Further, when the preset condition is the sum of photovoltaic active power of output Ppv and wind turbine power generation output power Pwd
Greater than zero, and the sum of photovoltaic active power of output Ppv and wind turbine power generation output power Pwd be greater than load active power Pl when, or
Person is greater than zero, and photovoltaic active power of output Ppv as the sum of photovoltaic active power of output Ppv and wind turbine power generation output power Pwd
It is less than or equal to load active power Pl with the sum of wind turbine power generation output power Pwd, and photovoltaic output voltage Upv is less than or equal to photovoltaic
When output voltage limit Umax, energy storage auxiliary cutting-in control mode is selected to control power grid.
On the other hand, the present invention provides a kind of high proportion wind-light storage access power distribution network multi-mode self-adaptive control device, packet
It includes:
Module is obtained, for obtaining photovoltaic active power of output Ppv, wind turbine power generation output power Pwd, load active power
Pl, photovoltaic output voltage Upv, photovoltaic output frequency Fpv；
Selecting module, for according to the photovoltaic active power of output Ppv, the wind turbine power generation output power Pwd, it is described
Load active power Pl, the photovoltaic output voltage UpvWith the photovoltaic output frequency FpvIt is adaptive selected according to preset condition
Firm power tracing control mode, network voltage frequency auxiliary control model, actively from cutting-in control mode and energy storage auxiliary simultaneously
One of net control model controls power grid.
In another aspect, the present invention provides a kind of electricity for the access power distribution network multi-mode self-adaptive control of high proportion wind-light storage
Sub- equipment, comprising:
Memory and processor, the processor and the memory complete mutual communication by bus；It is described to deposit
Reservoir is stored with the program instruction that can be executed by the processor, and it is above-mentioned that the processor calls described program instruction to be able to carry out
Method.
Another aspect, the present invention provide a kind of computer program product, and the computer program product is non-including being stored in
Computer program in transitory computer readable storage medium, the computer program include program instruction, when described program refers to
When order is computer-executed, the computer is made to execute above-mentioned method.
Another aspect, the present invention provide a kind of computer readable storage medium, are stored thereon with computer program, the meter
Calculation machine program realizes above-mentioned method when being executed by processor.
(3) beneficial effect
High proportion wind-light storage provided by the invention accesses power distribution network multi-mode self-adaptive control method, by according to power grid
Different operating statuses select corresponding control model, and smooth switching control mode, avoids when power grid being enable to break down
Shut down, make operate power grid when it is more steady, improve the reliability and safety of power grid.
Detailed description of the invention
Fig. 1 is to access the signal of power distribution network multi-mode self-adaptive control method according to the high proportion wind-light storage of the embodiment of the present invention
Figure；
Fig. 2 is to convert selection algorithm schematic diagram according to the control model of the embodiment of the present invention；
Fig. 3 is the firm power tracing control pattern diagram according to the embodiment of the present invention；
Fig. 4 is to assist cutting-in control pattern diagram according to the energy storage of the embodiment of the present invention；
Fig. 5 is the improvement IEEE33 node distribution example schematic diagram according to the embodiment of the present invention；
Fig. 6 is to emulate schematic diagram according to more disturbance timing running simulations of the embodiment of the present invention；
Fig. 7 is the control method and prior art control method Contrast on effect schematic diagram according to the embodiment of the present invention；
Fig. 8 is to access the signal of power distribution network multi-mode self-adaptive control device according to the high proportion wind-light storage of the embodiment of the present invention
Figure；
Fig. 9 is the electricity provided in an embodiment of the present invention that the control of power distribution network multi-mode self-adaptive is accessed for high proportion wind-light storage
The structural schematic diagram of sub- equipment.
Specific embodiment
In order to keep the purposes, technical schemes and advantages of the embodiment of the present invention clearer, implement below in conjunction with the present invention
Attached drawing in example, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment
It is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiment of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Embodiment 1:
Fig. 1 is to access the signal of power distribution network multi-mode self-adaptive control method according to the high proportion wind-light storage of the embodiment of the present invention
Figure, as shown in Figure 1, the embodiment of the present invention provides a kind of high proportion wind-light storage access power distribution network multi-mode self-adaptive control method,
Include:
Step S10, photovoltaic active power of output P is obtainedpv, wind turbine power generation output power Pwd, load active power Pl, photovoltaic
Output voltage Upv, photovoltaic output frequency Fpv；
Step S20, according to the photovoltaic active power of output Ppv, the wind turbine power generation output power Pwd, it is described load have
Function power Pl, the photovoltaic output voltage UpvWith the photovoltaic output frequency FpvConstant function is adaptive selected according to preset condition
Rate tracing control mode, network voltage frequency assist control model, actively from cutting-in control mode and energy storage auxiliary cutting-in control
One of mode controls power grid.
Specifically, high proportion wind-light storage access power distribution network includes wind turbine power generation station, photo-voltaic power generation station and energy-storage system, belong to
Distributed power generation network, relative to traditional power grid, high proportion wind-light storage accesses power distribution network, and there are more power supplys, stochastic volatility to rush
It hits, trend is distributed the features such as size direction is changeable, reactive voltage support dies down, system equivalent moment of inertia reduces.
The characteristics of accessing power distribution network for high proportion wind-light storage, high proportion wind-light storage access provided in an embodiment of the present invention are matched
Power grid multi-mode self-adaptive control method, firstly, obtaining photovoltaic active power of output Ppv, wind turbine power generation output power Pwd, load
Active-power Pl, photovoltaic output voltage Upv, photovoltaic output frequency Fpv。
Then, according to the photovoltaic active power of output Ppv, the wind turbine power generation output power Pwd, it is described load it is active
Power Pl, the photovoltaic output voltage UpvWith the photovoltaic output frequency FpvAccording to preset condition, current electric grid institute is judged automatically
The control model needed, and from firm power tracing control mode, network voltage frequency auxiliary control model, actively from and network control
One mode is adaptive selected in molding formula and energy storage auxiliary cutting-in control mode to control power grid.
For example, currently used firm power tracing control mode controls power grid, according to photovoltaic active power of output
Ppv, wind turbine power generation output power Pwd, load active power Pl, photovoltaic output voltage UpvWith photovoltaic output frequency FpvAccording to default
When condition detects that needs control power grid from cutting-in control mode using active, it will automatically switch over actively from grid-connected
Control model controls power grid.
Currently used network voltage frequency auxiliary control model controls power grid, according to photovoltaic active power of output
Ppv, wind turbine power generation output power Pwd, load active power Pl, photovoltaic output voltage UpvWith photovoltaic output frequency FpvAccording to default
Condition detect need using energy storage assist cutting-in control mode power grid is controlled when, will automatically switch over energy storage auxiliary
Cutting-in control mode controls power grid.
Further, when the preset condition is photovoltaic active power of output PpvWith wind turbine power generation output power PwdThe sum of
Less than or equal to zero, and power grid is in normal condition, and photovoltaic output voltage UpvGreater than photovoltaic output voltage lower limit Umin, and photovoltaic
Output frequency FpvBetween photovoltaic output frequency lower limit FminWith photovoltaic output frequency upper limit FmaxBetween when, select firm power tracking
Control model controls power grid.
Specifically, Fig. 2 is to convert selection algorithm schematic diagram according to the control model of the embodiment of the present invention, as shown in Fig. 2, first
First, need to obtain photovoltaic active power of output Ppv, wind turbine power generation output power Pwd, load active power Pl, photovoltaic output voltage
Upv, photovoltaic output frequency Fpv。
As photovoltaic active power of output PpvWith wind turbine power generation output power PwdThe sum of (i.e. distributed generation resource export wattful power
The sum of rate PDG) it is less than or equal to zero, and power grid is in normal condition, and photovoltaic output voltage UpvGreater than photovoltaic output voltage lower limit
Umin, and photovoltaic output frequency FpvBetween photovoltaic output frequency lower limit FminWith photovoltaic output frequency upper limit FmaxBetween when, selection is permanent
Determine power tracking control model to control power grid, wherein photovoltaic output voltage lower limit Umin, photovoltaic output frequency lower limit Fmin
With photovoltaic output frequency upper limit FmaxIt is preset threshold value according to the actual situation, the N in figure indicates that power grid is in just when being equal to 1
Normal state, N are in malfunction not equal to 1 expression power grid.
Fig. 3 is the firm power tracing control pattern diagram according to the embodiment of the present invention, as shown in figure 3, firstly, acquisition
Photovoltaic exports DC side busbar voltage, after then passing it through transmission function and PI controller operation, and power planning and go through
History data are summed, and the real power control target value Pref of photovoltaic generating system are finally obtained, according to real power control target value
The output power of Pref control photovoltaic generating system is allowed to be maintained in relative constant range.
The active power of output P of photovoltaic arraypvIt is the variation with intensity of illumination and environment temperature and shows strong non-thread
The variation characteristic of property.In order to realize the effective use of luminous energy, photovoltaic DC-to-AC converter generallys use disturbance tracking MPPT maximum power point tracking
Control strategy considers the influence of intensity of illumination, environment temperature, the DC voltage of inverter is made to operate in active maximum power point.
But when ratio of the photovoltaic power generation in power grid is greater than certain value, grid-connected electricity will be reduced using maximal power tracing control strategy
The stability of pressure generates disturbance to grid entry point, is unfavorable for the stabilization of power grid, it is therefore desirable to control the output wattful power of photovoltaic array
Rate PpvIt keeps constant.
In addition power grid for a long time constant maximum power control be the capacity of a consideration photovoltaic cell, system parameter state,
New energy fluctuates the optimization problem of situation etc., is related to photovoltaic power generation power prediction, daily planning photovoltaic power curve, grid generation
The contents such as Dispatching adjustment need to consider more multifactor.In high proportion renewable energy source network, photovoltaic generation power will need to join
It is the various energy resources such as wind-powered electricity generation, energy storage, works in coordination.Stability check will also be carried out for photovoltaic power generation ratio, consider perimeter strip
Part, so that it can guarantee that system is stablized in high proportion multipotency source network.
Firm power tracing control mode used in the embodiment of the present invention guarantees that constant power operation in maximum power point, leads to
The interface for increasing power output plan and historical data, border control module are crossed, to realize to power planning and historical data
The emulation of curve can verify its effect to photovoltaic power generation " disappear peak load ".It is defeated to power in terms of planning is with history two
It control effectively out, guarantees power-balance.
Further, when the preset condition is photovoltaic active power of output PpvWith wind turbine power generation output power PwdThe sum of
Less than or equal to zero, and power grid is in normal condition, and photovoltaic output voltage UpvLess than or equal to photovoltaic output voltage lower limit UminWhen,
Or work as photovoltaic active power of output PpvWith wind turbine power generation output power PwdThe sum of be less than or equal to zero, and power grid is in normal shape
State, and photovoltaic output voltage UpvGreater than photovoltaic output voltage lower limit Umin, and photovoltaic output frequency FpvNot in photovoltaic output frequency
Lower limit FminWith photovoltaic output frequency upper limit FmaxBetween when, or work as photovoltaic active power of output PpvWith wind turbine power generation output power
PwdThe sum of be greater than zero, and photovoltaic active power of output PpvWith wind turbine power generation output power PwdThe sum of be less than or equal to load wattful power
Rate Pl, and photovoltaic output voltage UpvGreater than photovoltaic output voltage limit Umax, and when power grid is in normal condition, select power grid electricity
Voltage-frequency rate auxiliary control model controls power grid.
Specifically, the selection algorithm that selection network voltage frequency auxiliary control model controls power grid is as shown in Figure 2.
Electric voltage frequency is fluctuated because of system disturbance in power grid, and in response to fluctuation, it is steady to improve electrical power system transient
It is qualitative, power grid is controlled using network voltage frequency auxiliary control model.The frequency of the control model regulates and controls with 50Hz
Input signal, by the way that the power output target value for the photovoltaic generating system that power/frequency response factor K is controlled is arranged, thus real
Existing primary adjustment of the photovoltaic plant to frequency.Power/frequency response factor K generally take be photovoltaic generating system maximum it is active go out
0.2 times of power.
Voltage auxiliary control is divided into the upper limit and lower limit is adjusted.When voltage out-of-limit occurs for grid-connected voltage, system fortune
It is about to start voltage adjusting.At this point, voltage effective value computing module real-time detection and passing to active and reactive control ring, system
Judge voltage value more lower limit still more the upper limit, and is calculated in real time by active and reactive reference value computing module reasonable active
Value and power reference Pref and reactive power reference qref Qref.
Over High-Limit Voltage: in the power distribution network of the photovoltaic containing high proportion, when higher photovoltaic power generation quantity at a time when lower user
When load consumes, Yi Fasheng grid entry point Over High-Limit Voltage situation.The voltage drop relational expression of route are as follows:
In formula, Δ V refers to the voltage value that needs reduce, PlFor load active power, PpvFor photovoltaic active power of output, R is
Line resistance, QlLoad output reactive power, QpvPhotovoltaic output reactive power, X are line reactance, V0For grid-connected point electricity
Pressure.
When the idle amount compensated needed for being calculated according to the needs for improving line voltage distribution, required idle magnitude of recruitment are as follows:
In formula, V1Referring to needs voltage value to be achieved, and Δ V refers to that the voltage value that need to be improved, X are line reactance.
When the active amount cut down needed for being calculated according to the needs for reducing line voltage distribution, the active amount of required reduction are as follows:
In formula, V1Referring to needs voltage value to be achieved, and Δ V refers to that the voltage value that needs reduce, R are line resistance, according to the formula
(3) it can be seen that, only PpvWhen greater than certain value, Δ V is likely to inversely, i.e., photovoltaic power generation quantity it is excessively high be Over High-Limit Voltage necessity
Condition.Therefore, when there is a situation where grid entry point Over High-Limit Voltage, current time electricity to be cut down need to be only calculated according to above formula
The corresponding active power Δ P of Δ V is pressed, then the active output of photovoltaic is made to cut down Δ P, obtaining the given of current time photovoltaic DC-to-AC converter has
Function reference value Pref.
Voltage gets over lower limit: when lower photovoltaic power generation quantity at a time when higher customer charge consumes, Yi Fasheng grid entry point electricity
Pressure gets over lower limit situation.Idle reference value computing module obtains signal at this time, and it is to be hoisted can to calculate current time according to above formula (2)
The corresponding reactive power Δ Q of voltage Δ V, then increase the idle output of photovoltaic by Δ Q, obtain current time photovoltaic DC-to-AC converter to
Fixed idle reference value Qref.
Further, when the preset condition is photovoltaic active power of output PpvWith wind turbine power generation output power PwdThe sum of
Less than or equal to zero, and when power grid is in malfunction, or work as photovoltaic active power of output PpvWith wind turbine power generation output power Pwd
The sum of be greater than zero, and photovoltaic active power of output PpvWith wind turbine power generation output power PwdThe sum of be less than or equal to load active power
Pl, and photovoltaic output voltage UpvGreater than photovoltaic output voltage limit Umax, and when power grid is in malfunction, selection is actively from simultaneously
Net control model controls power grid.
Specifically, selection is actively as shown in Figure 2 from the selection algorithm that cutting-in control mode controls power grid.
It is actively realized from cutting-in control mode by setting angle/amplitude/frequency response factor temporary to grid-connected procedure fault
State control response, the response speed with Millisecond.Especially in failure, photovoltaic off-grid is set to reduce network voltage in time
Power fluctuates widely, and grid-connected after fault recovery, and electric system can be made faster to restore stable, guarantees that supply is active
Power.Active off-network isolated operation is carried out when Power Network Transient Stability is unbalance or photo-voltaic power supply internal circuit failure, when
Grid-connected points of common connection (PCC) the response factor state that detects is carved, active reclosing is networked after Failure elimination or power system restoration are stablized.
Photovoltaic is provided with from Grid-connected Control Strategy, amplitude, phase angle, frequency various aspects condition is established and checks, meeting condition
Asynchronous switch-on and smooth off-network afterwards.Appropriate divide-shut brake can reasonable dynamic configuration photovoltaic permeability, cause permeability is excessively high
Grid-connected points of common connection voltage spikes more selective breaking part photovoltaic in limited time, guarantees safe and stable operation of power system.
Further, when the preset condition is photovoltaic active power of output PpvWith wind turbine power generation output power PwdThe sum of
Greater than zero, and photovoltaic active power of output PpvWith wind turbine power generation output power PwdThe sum of be greater than load active power PlWhen, or
As photovoltaic active power of output PpvWith wind turbine power generation output power PwdThe sum of be greater than zero, and photovoltaic active power of output PpvWith wind
Machine power generation output power PwdThe sum of be less than or equal to load active power Pl, and photovoltaic output voltage UpvElectricity is exported less than or equal to photovoltaic
Press upper limit UmaxWhen, select energy storage auxiliary cutting-in control mode to control power grid.
Specifically, the selection algorithm that selection energy storage auxiliary cutting-in control mode controls power grid is as shown in Figure 2.
Fig. 4 is to assist cutting-in control pattern diagram according to the energy storage of the embodiment of the present invention, as shown in figure 4, energy storage is to simultaneously
The transient swing of each output quantity of network process has smoothing effect, is absorbed by Adaptive Control or delivered power is realized to high proportion net
The regulation of network overall power, and have no need to change grid-connected photovoltaic control mode.Meanwhile energy storage auxiliary system inhibits photovoltaic electric
That stands goes out fluctuation, for avoid because additional frequency strategy appearance and influence the effect of existing smooth control, increase individually
Dead zone and amplitude limit link.Model is provided with lead-lag link, can be according to the requirement of actual electric network dynamic stability to light
The grid-connected power of overhead utility carries out certain phase compensation, to preferably increase the damping of system.Pass through photovoltaic power, system
Load, system loss and other power meters calculate energy storage power target value, then pass through floating regulation, dead zone, the meter such as clipping
It calculates, finally by filtering, the power and voltage of energy storage output is obtained, thus to realize the control to energy storage.
When realizing active power auxiliary control, the grid-connected position of energy-storage system, which can be divided into, passes through DC/AC for energy-storage system
Two on the DC bus that electronic power convertor is connected to grid entry point and energy-storage system is connected in the current transformer of distributed generation resource
Kind mode, multipotency joint output power meet power grid regulation.Second of grid-connected mode is since electrochemical energy storage is mainly with direct current shape
Formula carry out charge and discharge, therefore which only need that energy-storage system can be realized by DC/DC current transformer it is active to distributed generation resource
The adjusting of power controls.
Distributed energy storage is arranged in photovoltaic generating system, participates in the response of system fast frequency.In frequency modulation application, energy storage system
System has many advantages, such as that standby operation expense is lower, starts response quickly, total power puts into operation, and speed is fast, while there is capacity to have
It limits, the disadvantage that the continuous working period is shorter.Therefore, arrange a certain amount of energy storage device in the power system, when system occur compared with
When big frequency departure, can conventional frequency modulation means effect before, quickly put into response frequency deviation, slow down frequency shift (FS) speed and
Reduce frequency shift (FS) size.After conventional frequency modulation means investment, energy-storage system can be then gradually backed out, when simultaneous selection is suitable
Between realize energy state adjustment.
Below by the effect of the experimental verification embodiment of the present invention:
It is imitated using timing simulation operation emulation is used based on multi -CPU fast transient for the effect for verifying the embodiment of the present invention
True platform, by improving IEEE33 node distribution example, to the photovoltage model of single control model than in the prior art, to being mentioned
Model carries out a series of scene simplation verifications, tests the validity and real-time of combined-grid multi-mode adaptive model based control
Card, and network process transient response characteristic carries out simulation analysis.The setting of photovoltaic array parameter is as shown in table 1, environmental parameter variation
As shown in table 2, cutting-in control parameter is as shown in table 3.
1 photovoltaic array parameter list of table
2 environmental parameter of table changes table
3 cutting-in control parameter list of table
Wind power plant capacity consistent single machine power generation capacity in nearly distal end is 900kw, wind speed variation；Photovoltaic single machine power generation capacity be
100kw, illumination temperature variation；Energy storage 900kw/135kWh, battery SOC 0.5 are run in normal operation；Route
In have 32 branches, 5 interconnection switch branches, 1 electric power network head end reference voltage 12.66kV, network total load 5084.26
+j2547.32kVA.Two Fans, 1 energy storage, 5 photovoltaic plants access distribution system, and permeability is more than 60%, photovoltaic access
High proportion renewable energy distribution network.The overall process transient emulation of sort run when the embodiment of the present invention uses more disturbances, to height
The power distribution network fluctuation of ratio wind-light storage access is tested, and is verified to the validity of multiposition control system.
Fig. 5 is the improvement IEEE33 node distribution example schematic diagram according to the embodiment of the present invention, and Fig. 6 is according to of the invention real
More disturbance timing running simulations emulation schematic diagram of example is applied, Fig. 7 is the control method and the prior art according to the embodiment of the present invention
Control method Contrast on effect schematic diagram.
Dotted line is that photovoltaic single control mode and pessimistic concurrency control, single control model only correspond to a kind of list in the prior art in Fig. 7
One state of a control, generally invariable power are grid-connected.Solid line is multi-mode model after the grid-connected coordination control in the embodiment of the present invention, more
Kind control model adaptively switches, and adapts to different various control states.Fig. 7 (a) is grid-connected point in overall process timing
Frequency response characteristic in emulation, Fig. 7 (b) they are voltage responsive characteristic of the grid-connected point in overall process time stimulatiom, wherein
Voltage is per unit value, and Fig. 7 (c) is power response characteristic of the grid-connected point in overall process time stimulatiom.
By observing dotted line, normal condition is operated in 0-2s system, photovoltaic is steadily connected to the grid, grid entry point electric voltage frequency
Value is maintained at zone of reasonableness, and photovoltaic starts to interact power with power grid.As 2s, system operates in risk status, and extensive blower connects
Enter power distribution network, generates biggish voltage to frequency fluctuation, the fluctuation duration is long and does not have reducing tendency.Energy storage grid-connected blower when 3s
Off-network, energy storage use sagging control strategy, can balance to a certain degree the off-grid fluctuation of double-fed blower, but off-network moment still produces
Raw larger voltage swell phenomenon.Energy storage off-network when 4s, frequency does not have significant change, but voltage transient phenomenon is significant, voltage value
4 times of overrate, there are greater risks.Blower energy storage is grid-connected together when 5s, since energy storage is enable to respond quickly frequency electricity
Buckling simultaneously makes compensation, and grid-connected moment generates temporal variations and centainly inhibited, but there are still fluctuate widely.Distal end when 6s
Blower is incorporated to, and there are wind power plant at two in network, the fluctuation of grid entry point electric voltage frequency is obvious to be reinforced.System operates in failure shape when 7s
State, occurs three phase short circuit fault, and grid entry point voltage directly jumps to zero, extreme influence power distribution network stability.When 8s, failure is deposited
But wind-light storage electricity generation system off-network, frequency fluctuation gradually decrease.System operates in recovery state when 9s, and three-phase fault disappears,
Wind-light storage is grid-connected, continues to generate fluctuation.Photovoltaic generating system proximal load is first reduced when 10s increases afterwards, aggravation fluctuation.
Load value state back to normal when 11s.
By carrying out temporal evolution Analysis on Mechanism, simulated effect pair to timing simulation overall process and mode handover procedure emulation
Than showing that multi-mode self-adaptive control can be in the distribution that high proportion wind-light storage accesses, to normal condition, Optimal State, wind
The operating statuses such as dangerous state, malfunction and recovery state optimize, and simulation result shows to optimize successfully, multi-mode self-adaptive
Control is substantially better than single-mode control, keeps grid entry point electric voltage frequency in zone of reasonableness, power steadily interacts, and makes photovoltaic power generation
System has subnormal voltage operation ability during failure.
High proportion wind-light storage provided by the invention accesses power distribution network multi-mode self-adaptive control method, by according to power grid
Different operating statuses select corresponding control model, and smooth switching control mode, avoids when power grid being enable to break down
Shut down, make operate power grid when it is more steady, improve the reliability and safety of power grid.
Embodiment 2:
Fig. 8 is to access the signal of power distribution network multi-mode self-adaptive control device according to the high proportion wind-light storage of the embodiment of the present invention
Figure, as shown in figure 8, the embodiment of the present invention provides a kind of high proportion wind-light storage access power distribution network multi-mode self-adaptive control device,
The embodiment of the present invention provides a kind of high proportion wind-light storage access power distribution network multi-mode self-adaptive control device and mentions with above-described embodiment
The method of confession is corresponding, which includes: to obtain module 10 and selecting module 20, wherein obtains module 10 for obtaining photovoltaic
Active power of output Ppv, wind turbine power generation output power Pwd, load active power Pl, photovoltaic output voltage Upv, photovoltaic output frequency
Fpv；
Selecting module 20 is used for according to the photovoltaic active power of output Ppv, the wind turbine power generation output power Pwd, it is described
Load active power Pl, the photovoltaic output voltage UpvWith the photovoltaic output frequency FpvIt is adaptive selected according to preset condition
Firm power tracing control mode, network voltage frequency auxiliary control model, actively from cutting-in control mode and energy storage auxiliary simultaneously
One of net control model controls power grid.
Specifically, high proportion wind-light storage access power distribution network includes wind turbine power generation station, photo-voltaic power generation station and energy-storage system, belong to
Distributed power generation network, relative to traditional power grid, high proportion wind-light storage accesses power distribution network, and there are more power supplys, stochastic volatility to rush
It hits, trend is distributed the features such as size direction is changeable, reactive voltage support dies down, system equivalent moment of inertia reduces.
The characteristics of accessing power distribution network for high proportion wind-light storage, firstly, active by obtaining the acquisition photovoltaic output of module 10
Power Ppv, wind turbine power generation output power Pwd, load active power Pl, photovoltaic output voltage Upv, photovoltaic output frequency Fpv。
Then, by selecting module 20 according to the photovoltaic active power of output Ppv, the wind turbine power generation output power
Pwd, the load active power Pl, the photovoltaic output voltage UpvWith the photovoltaic output frequency FpvAccording to preset condition, certainly
It is dynamic to judge control model required for current electric grid, and controlled from firm power tracing control mode, network voltage frequency auxiliary
Mode, actively from cutting-in control mode and energy storage auxiliary cutting-in control mode in be adaptive selected one mode to power grid carry out
Control.
For example, currently used firm power tracing control mode controls power grid, according to photovoltaic active power of output
Ppv, wind turbine power generation output power Pwd, load active power Pl, photovoltaic output voltage UpvWith photovoltaic output frequency FpvAccording to default
When condition detects that needs control power grid from cutting-in control mode using active, it will automatically switch over actively from grid-connected
Control model controls power grid.
Currently used network voltage frequency auxiliary control model controls power grid, according to photovoltaic active power of output
Ppv, wind turbine power generation output power Pwd, load active power Pl, photovoltaic output voltage UpvWith photovoltaic output frequency FpvAccording to default
Condition detect need using energy storage assist cutting-in control mode power grid is controlled when, will automatically switch over energy storage auxiliary
Cutting-in control mode controls power grid.
High proportion wind-light storage provided by the invention accesses power distribution network multi-mode self-adaptive control device, by according to power grid
Different operating statuses select corresponding control model, and smooth switching control mode, avoids when power grid being enable to break down
Shut down, make operate power grid when it is more steady, improve the reliability and safety of power grid.
Embodiment 3:
Fig. 9 is the electricity provided in an embodiment of the present invention that the control of power distribution network multi-mode self-adaptive is accessed for high proportion wind-light storage
The structural schematic diagram of sub- equipment, as shown in figure 9, the equipment includes: processor (processor) 801, memory (memory)
802 and bus 803；
Wherein, processor 801 and memory 802 complete mutual communication by the bus 803；
Processor 801 is used to call the program instruction in memory 802, to execute provided by above-mentioned each method embodiment
Method, for example,
Obtain photovoltaic active power of output Ppv, wind turbine power generation output power Pwd, load active power Pl, photovoltaic output voltage
Upv, photovoltaic output frequency Fpv；
According to the photovoltaic active power of output Ppv, the wind turbine power generation output power Pwd, the load active power Pl、
The photovoltaic output voltage UpvWith the photovoltaic output frequency FpvFirm power tracking control is adaptive selected according to preset condition
Molding formula, network voltage frequency assist control model, actively from cutting-in control mode and energy storage auxiliary cutting-in control mode
A kind of pair of power grid controls.
Embodiment 4:
The embodiment of the present invention discloses a kind of computer program product, and the computer program product is non-transient including being stored in
Computer program on computer readable storage medium, the computer program include program instruction, when described program instructs quilt
When computer executes, computer is able to carry out method provided by above-mentioned each method embodiment, for example,
Obtain photovoltaic active power of output Ppv, wind turbine power generation output power Pwd, load active power Pl, photovoltaic output voltage
Upv, photovoltaic output frequency Fpv；
According to the photovoltaic active power of output Ppv, the wind turbine power generation output power Pwd, the load active power Pl、
The photovoltaic output voltage UpvWith the photovoltaic output frequency FpvFirm power tracking control is adaptive selected according to preset condition
Molding formula, network voltage frequency assist control model, actively from cutting-in control mode and energy storage auxiliary cutting-in control mode
A kind of pair of power grid controls.
Embodiment 5:
The embodiment of the present invention provides a kind of non-transient computer readable storage medium, the non-transient computer readable storage
Medium storing computer instruction, the computer instruction make the computer execute side provided by above-mentioned each method embodiment
Method, for example,
Obtain photovoltaic active power of output Ppv, wind turbine power generation output power Pwd, load active power Pl, photovoltaic output voltage
Upv, photovoltaic output frequency Fpv；
According to the photovoltaic active power of output Ppv, the wind turbine power generation output power Pwd, the load active power Pl、
The photovoltaic output voltage UpvWith the photovoltaic output frequency FpvFirm power tracking control is adaptive selected according to preset condition
Molding formula, network voltage frequency assist control model, actively from cutting-in control mode and energy storage auxiliary cutting-in control mode
A kind of pair of power grid controls.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above method embodiment can pass through
The relevant hardware of program instruction is completed, and program above-mentioned can be stored in a computer readable storage medium, the program
When being executed, step including the steps of the foregoing method embodiments is executed；And storage medium above-mentioned includes: ROM, RAM, magnetic disk or light
The various media that can store program code such as disk.
The embodiments such as device and equipment described above are only schematical, wherein described be used as separate part description
Unit may or may not be physically separated, component shown as a unit may or may not be
Physical unit, it can it is in one place, or may be distributed over multiple network units.It can be according to the actual needs
Some or all of the modules therein is selected to achieve the purpose of the solution of this embodiment.Those of ordinary skill in the art are not paying
In the case where creative labor, it can understand and implement.
Through the above description of the embodiments, those skilled in the art can be understood that each embodiment can
It realizes by means of software and necessary general hardware platform, naturally it is also possible to pass through hardware.Based on this understanding, on
Stating technical solution, substantially the part that contributes to existing technology can be embodied in the form of software products in other words, should
Computer software product may be stored in a computer readable storage medium, such as ROM/RAM, magnetic disk, CD, including several fingers
It enables and using so that a computer equipment (can be personal computer, server or the network equipment etc.) executes each implementation
Method described in certain parts of example or embodiment.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (7)
1. a kind of high proportion wind-light storage accesses power distribution network multi-mode self-adaptive control method characterized by comprising
Obtain photovoltaic active power of output Ppv, wind turbine power generation output power Pwd, load active power Pl, photovoltaic output voltage Upv、
Photovoltaic output frequency Fpv；
According to the photovoltaic active power of output Ppv, the wind turbine power generation output power Pwd, the load active power Pl, it is described
Photovoltaic output voltage UpvWith the photovoltaic output frequency FpvFirm power tracing control mould is adaptive selected according to preset condition
Formula, network voltage frequency assist control model, actively from one of cutting-in control mode and energy storage auxiliary cutting-in control mode
Power grid is controlled；
When the preset condition is photovoltaic active power of output PpvWith wind turbine power generation output power PwdThe sum of be equal to zero, and at power grid
In normal condition, and photovoltaic output voltage UpvGreater than photovoltaic output voltage lower limit Umin, and photovoltaic output frequency FpvBetween photovoltaic
Output frequency lower limit FminWith photovoltaic output frequency upper limit FmaxBetween when, select firm power tracing control mode to power grid carry out
Control.
2. the method according to claim 1, wherein when the preset condition is photovoltaic active power of output PpvWith
Wind turbine power generation output power PwdThe sum of be equal to zero, and power grid is in normal condition, and photovoltaic output voltage UpvLess than or equal to photovoltaic
Output voltage lower limit UminWhen, or work as photovoltaic active power of output PpvWith wind turbine power generation output power PwdThe sum of be equal to zero, and
Power grid is in normal condition, and photovoltaic output voltage UpvGreater than photovoltaic output voltage lower limit Umin, and photovoltaic output frequency FpvNo
In photovoltaic output frequency lower limit FminWith photovoltaic output frequency upper limit FmaxBetween when, or work as photovoltaic active power of output PpvWith wind
Machine power generation output power PwdThe sum of be greater than zero, and photovoltaic active power of output PpvWith wind turbine power generation output power PwdThe sum of be less than
Equal to load active power Pl, and photovoltaic output voltage UpvGreater than photovoltaic output voltage limit Umax, and power grid is in normal condition
When, select network voltage frequency auxiliary control model to control power grid.
3. the method according to claim 1, wherein when the preset condition is photovoltaic active power of output PpvWith
Wind turbine power generation output power PwdThe sum of be equal to zero, and when power grid be in malfunction, or as photovoltaic active power of output PpvWith
Wind turbine power generation output power PwdThe sum of be greater than zero, and photovoltaic active power of output PpvWith wind turbine power generation output power PwdThe sum of it is small
In equal to load active power Pl, and photovoltaic output voltage UpvGreater than photovoltaic output voltage limit Umax, and power grid is in failure shape
When state, selection actively controls power grid from cutting-in control mode.
4. the method according to claim 1, wherein when the preset condition is photovoltaic active power of output PpvWith
Wind turbine power generation output power PwdThe sum of be greater than zero, and photovoltaic active power of output PpvWith wind turbine power generation output power PwdThe sum of it is big
In load active power PlWhen, or work as photovoltaic active power of output PpvWith wind turbine power generation output power PwdThe sum of be greater than zero, and
Photovoltaic active power of output PpvWith wind turbine power generation output power PwdThe sum of be less than or equal to load active power Pl, and photovoltaic output electricity
Press UpvLess than or equal to photovoltaic output voltage limit UmaxWhen, select energy storage auxiliary cutting-in control mode to control power grid.
5. a kind of high proportion wind-light storage accesses power distribution network multi-mode self-adaptive control device characterized by comprising
Module is obtained, for obtaining photovoltaic active power of output Ppv, wind turbine power generation output power Pwd, load active power Pl, light
Lie prostrate output voltage Upv, photovoltaic output frequency Fpv；
Selecting module, for according to the photovoltaic active power of output Ppv, the wind turbine power generation output power Pwd, it is described load have
Function power Pl, the photovoltaic output voltage UpvWith the photovoltaic output frequency FpvConstant function is adaptive selected according to preset condition
Rate tracing control mode, network voltage frequency assist control model, actively from cutting-in control mode and energy storage auxiliary cutting-in control
One of mode controls power grid；
When the preset condition is photovoltaic active power of output PpvWith wind turbine power generation output power PwdThe sum of be equal to zero, and at power grid
In normal condition, and photovoltaic output voltage UpvGreater than photovoltaic output voltage lower limit Umin, and photovoltaic output frequency FpvBetween photovoltaic
Output frequency lower limit FminWith photovoltaic output frequency upper limit FmaxBetween when, select firm power tracing control mode to power grid carry out
Control.
6. a kind of electronic equipment for the access power distribution network multi-mode self-adaptive control of high proportion wind-light storage, which is characterized in that packet
It includes:
Memory and processor, the processor and the memory complete mutual communication by bus；The memory
It is stored with the program instruction that can be executed by the processor, the processor calls described program instruction to be able to carry out right such as and wants
Seek 1 to 4 any method.
7. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer program quilt
The method as described in Claims 1-4 is any is realized when processor executes.
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| CN110544939A (en) * | 2019-08-19 | 2019-12-06 | 国网西藏电力有限公司电力科学研究院 | Power grid low-frequency load shedding optimal configuration method and system suitable for high-proportion new energy |
| CN111522234A (en) * | 2020-05-12 | 2020-08-11 | 深圳市汇智通咨询有限公司 | Automatic control system and method based on self-adaptive strategy |
| CN112383082B (en) * | 2020-08-26 | 2022-09-16 | 平高集团有限公司 | Light storage hybrid system and multi-mode redundancy control method thereof |
| CN114188996B (en) * | 2021-12-06 | 2023-06-23 | 国网湖南省电力有限公司 | Active control method, system and medium in electrochemical energy storage power station adapted to frequency modulation function |
| CN116365596B (en) * | 2023-03-14 | 2023-11-28 | 宁夏众合智源电力工程咨询有限公司 | Distributed power grid-based power scheduling method and system |
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