CN109193818A - A kind of powerless control method and system of new energy power station - Google Patents
A kind of powerless control method and system of new energy power station Download PDFInfo
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- CN109193818A CN109193818A CN201811007748.9A CN201811007748A CN109193818A CN 109193818 A CN109193818 A CN 109193818A CN 201811007748 A CN201811007748 A CN 201811007748A CN 109193818 A CN109193818 A CN 109193818A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/50—Controlling the sharing of the out-of-phase component
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- H02J3/383—
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- H02J3/386—
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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Abstract
The present invention provides the powerless control method and system of a kind of new energy power station, according to measure and control device operation information on the spot and new energy power station grid entry point interconnection parameter, calculates grid entry point voltage；When grid entry point voltage deviation voltage reference value, the voltage sensibility exported based on grid entry point voltage reference value and grid entry point relative to new energy power station, the reactive power adjustment amount for calculating new energy power station is exported according to the reactive power that reactive power adjustment amount adjusts new energy power station.Ensure to play fast reactive regulating power to the greatest extent under the constraint of power station reactive power limit value and power station exit potential limit value through the above scheme, so that grid entry point voltage meets reference value requirement, promotes the electric network reactive-load voltage support ability of new energy power station.
Description
Technical field
The present invention relates to generations of electricity by new energy to run control technology field, and in particular to a kind of idle control of new energy power station
Method and system.
Background technique
Extensive new energy power station, which focuses mostly on, builds in areas such as illumination resource, wind-resources condition good northwest, northeast, this
A little territorial scopes are wide and local load is small, and generation of electricity by new energy needs long-distance sand transport to dissolve.New energy such as photovoltaic, wind-force itself have
There are the features such as intermittence, randomness, unstability and nonunf ormity, the short-term fluctuation of weather and the cyclically-varying of weather
Caused generation of electricity by new energy, which goes out fluctuation and will lead to transmission line of electricity voltage, transfinites, and then influences the voltage stabilization of whole system
Property.During power grid disturbs, power grid is supported with greater need for the quick power response of extensive new energy power station, to maintain power train
The safe and stable operation of system.Grid collapses disturbance early stage was repeatedly reported both at home and abroad, and it is de- that large area occurs in new energy unit
Net, new energy power station do not provide effective power support sufficiently, in turn result in the case of power system security fault spread.
With under the development strategy trend for currently actively pushing forward global energy Internet Construction, new energy power station construction scale
Constantly expand, access voltage class is continuously improved, and the distance for needing to transmit electricity is farther, and generation of electricity by new energy capacity is in the power system
Ratio is continuously improved, and the generation of electricity by new energy influence stable to power system security increasingly increases, this is to the extensive new energy of promotion
More stringent requirements are proposed for power station operation controlled level and power grid enabling capabilities.
New energy power station accesses power grid, and bring first is that the voltage power-less of access point and area power grid and power quality are asked
Topic.With the continuous promotion of power electronic technique, the Wind turbines and photovoltaic generation unit of mainstream all have preferable electricity at present
Pressure/idle control ability, and can be grid-connected without impacting by control strategy realization, but by unit capacity and power electronic devices
The limitation of overload capacity, voltage and Reactive-power control ability are limited, therefore are also required to carry out integrated voltage/nothing of new energy power station
Function coordinated control improves the voltage & var control ability of new energy power station, provides ancillary service function to power grid.
National standard 19963-2011 " wind power plant accesses power system technology regulation " and 19964-2012 " photo-voltaic power generation station access
Power system technology regulation " it is distinctly claimed wind power plant and photovoltaic plant and must have Reactive-power control ability, and preferentially utilize
The Reactive-power control ability of Wind turbines and photovoltaic generation unit itself.In terms of the idle control strategy of new energy power station, not yet
Unified technical standard, while very weak power grid end is accessed for many extensive new energy of the characteristic distributions of new energy
End.Therefore with the gradually expansion of new-energy grid-connected scale, more powerful voltage power-less regulating measure is needed, guarantees new energy
Secure accessing and stable operation.
Summary of the invention
To make up for the shortcomings of the above existing technologies, the present invention provides a kind of powerless control method of new energy power station and is
System has fully considered the reactive voltage sensitivity relation of new energy power station grid entry point and power station outlet, accurate to calculate grid entry point electricity
When pressure meets voltage reference value demand, the reactive power adjustment amount of each new energy power station, it is ensured that meet power station reactive power limit value
Fast reactive regulating power is played to the greatest extent under constraint with power station exit potential limit value, it is ensured that grid entry point voltage meets ginseng
Value requirement is examined, the electric network reactive-load voltage support ability of new energy power station is promoted.
In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical scheme that:
A kind of powerless control method of new energy power station, which comprises
According to measure and control device operation information on the spot and new energy power station grid entry point interconnection parameter, grid entry point voltage is calculated；
It is opposite based on the grid entry point voltage reference value and grid entry point when the grid entry point voltage deviation voltage reference value
Voltage sensibility in new energy power station outlet, calculates the reactive power adjustment amount of new energy power station, according to the reactive power
Adjustment amount adjusts the reactive power output of new energy power station.
Preferably, grid entry point voltage is determined by following formula:
In formula, UPCCFor grid entry point voltage, PRAnd QRThe respectively active power and reactive power of new energy power station output, UR
Busbar voltage is exported for newly energy power station, R and X are respectively resistance and the reactance of new energy power station grid entry point interconnection.
Preferably, the reactive power adjustment amount of new energy power station is determined by following formula:
In formula, S1For the voltage sensibility that grid entry point is exported relative to new energy power station, UPCCFor grid entry point voltage, UPCC_ref
For voltage reference value, Δ UPCCFor grid entry point voltage real-time change amount.
Preferably, after the reactive power output that new energy power station is adjusted according to reactive power adjustment amount further include:
Reactive power output limit value and exit potential operational envelope based on new energy power station, to the reactive power adjustment amount into
Row correction, comprising:
If the new energy power station reactive power output adjusted by reactive power adjustment amount is greater than preset idle function
Rate exports limit value, then the reactive power adjustment amount of limit value more new energy power station is exported according to reactive power predetermined；
If causing exit potential out-of-limit by adjusting new energy power station reactive power, according to new energy power station pressure sensitive
Spend the reactive power adjustment amount of more new energy power station.
Further, described to be adjusted according to the reactive power of adjustable reactive power limit value more new energy power station predetermined
Amount, such as following formula:
In formula, QRFor the reactive power of new energy power station output, QmaxFor new energy power station reactive power maximum value, QminFor
New energy power station reactive power minimum value.
Further, the reactive power adjustment amount according to new energy power station voltage sensibility more new energy power station, such as
Following formula:
In formula, S2Indicate new energy power station voltage sensibility,For new energy power station exit potential upper limit value,For
New energy power station exit potential lower limit value.
A kind of powerless control system of new energy power station, comprising:
First computing module, for according to measure and control device operation information on the spot and new energy power station grid entry point interconnection ginseng
Number calculates grid entry point voltage；
Second computing module, for being based on the grid entry point Voltage Reference when grid entry point voltage deviation voltage reference value
The voltage sensibility that value and grid entry point are exported relative to new energy power station, calculates the reactive power adjustment amount of new energy power station；
Control module, the reactive power for adjusting new energy power station according to the reactive power adjustment amount export.
Preferably, the powerless control system further include:
Correction module, it is right for exporting limit value and exit potential operational envelope based on new energy power station reactive power
Reactive power adjustment amount is corrected.
Preferably, first computing module includes: computing unit, for determining grid entry point voltage by following formula:
In formula, UPCCFor grid entry point voltage, PRAnd QRThe respectively active power and reactive power of new energy power station output, UR
Busbar voltage is exported for newly energy power station, R and X are respectively resistance and the reactance of new energy power station grid entry point interconnection.
Preferably, second computing module comprises determining that unit, for determining the idle of new energy power station by following formula
Power adjustment:
In formula, S1For the voltage sensibility that grid entry point is exported relative to new energy power station, UPCCFor grid entry point voltage, UPCC_ref
For voltage reference value, Δ UPCCFor grid entry point voltage real-time change amount.
Preferably, the correction module includes:
First updating unit, if the new energy power station reactive power output for adjusting by reactive power adjustment amount is greater than
Preset reactive power exports limit value, then exports the idle of limit value more new energy power station according to reactive power predetermined
Power adjustment；
Second updating unit, if for causing exit potential out-of-limit by adjusting new energy power station reactive power, basis
The reactive power adjustment amount of new energy power station voltage sensibility more new energy power station.
Further, first updating unit includes: the first update subelement, for according to adjustable nothing predetermined
The reactive power adjustment amount of function power limit more new energy power station, such as following formula:
In formula, QRFor the reactive power of new energy power station output, QmaxFor new energy power station reactive power maximum value, QminFor
New energy power station reactive power minimum value.
Further, second updating unit includes: the second update subelement, for according to new energy power station voltage spirit
The reactive power adjustment amount of sensitivity more new energy power station, such as following formula:
In formula, S2Indicate new energy power station voltage sensibility,For new energy power station exit potential upper limit value,For
New energy power station exit potential lower limit value.
Compared with the immediate prior art, technical solution provided by the invention is had the advantages that
A kind of new energy power station powerless control method provided by the invention and system are run according to measure and control device on the spot first
Information and new energy power station grid entry point interconnection parameter calculate grid entry point voltage.Consider the applicability of control strategy, practical electricity
Farther out, it is relatively tired that new energy power station directly acquires grid entry point information of voltage to distance between new energy power station outlet and grid entry point in net
Difficulty, and wind power plant outlet busbar voltage, the information such as line current can be by power station measure and control device quick obtainings on the spot, without installing additional
Additional measuring device, has a extensive future.
Secondly when grid entry point voltage deviation voltage reference value, based on grid entry point voltage reference value and grid entry point relative to new
The voltage sensibility of energy power station outlet, calculates the reactive power adjustment amount of new energy power station；Finally adjusted according to reactive power
Amount adjusts the reactive power output of new energy power station.Ensure that grid entry point voltage meets reference value requirement, fully considers new energy electricity
The voltage sensibility relationship of grid entry point of standing and power station outlet obtains the reactive power adjustment amount of new energy power station to promote new energy
The network voltage enabling capabilities in source power station.
Detailed description of the invention
Fig. 1 is the new energy power station powerless control method flow chart provided in the embodiment of the present invention；
Fig. 2 is the idle control strategy of large-scale new energy power station based on voltage sensibility provided in the embodiment of the present invention
Implementation flow chart；
Fig. 3 is the example system model figure provided in the embodiment of the present invention；
Simulation result schematic diagram when Fig. 4 is the wind speed variation provided in the embodiment of the present invention；Wherein (a) wind power plant exports
Voltage, (b) access point voltage；(c) wind power plant reactive power；
Fig. 5 is the simulation result schematic diagram of the access point load variations provided in the embodiment of the present invention；Wherein (a) wind power plant
Exit potential, (b) access point voltage；(c) wind power plant reactive power.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
The present invention provides the powerless control method and system of a kind of new energy power station, utilizes the pressure sensitive of new energy power station
The reactive power adjustment amount of new energy power station is calculated in degree, while considering new energy power station reactive power output limit value and simultaneously
Voltage normal operation range about beam alignment new energy power station reactive power setting valve in site is ensuring that new energy power station outlet is idle
Voltage effectively supports grid entry point voltage stabilization within the allowable range.
As depicted in figs. 1 and 2, specific steps are as follows:
S1 calculates grid entry point electricity according to measure and control device operation information on the spot and new energy power station grid entry point interconnection parameter
Pressure；
S2 is when grid entry point voltage deviation voltage reference value, based on grid entry point voltage reference value and grid entry point relative to new energy
The voltage sensibility of source power station outlet, calculates the reactive power adjustment amount of new energy power station；
S3 is exported according to the reactive power that reactive power adjustment amount adjusts new energy power station.
In step S1, it is contemplated that the applicability of control strategy, in actual electric network between new energy power station outlet and grid entry point
Farther out, new energy power station directly acquires grid entry point information of voltage relative difficulty to distance, and the letter such as export busbar voltage, line current
Breath can be by power station measure and control device quick obtaining on the spot, therefore can be by measure and control device operation information and new energy power station on the spot simultaneously
Grid entry point voltage is calculated in site interconnection parameter:
In formula, UPCCFor grid entry point voltage, PRAnd QRThe respectively active power and reactive power of new energy power station output, UR
Busbar voltage is exported for newly energy power station, R and X are respectively resistance and the reactance of new energy power station grid entry point interconnection.
Wherein, measure and control device operation information on the spot, active/reactive power and outlet bus including new energy power station output
Voltage；New energy power station grid entry point interconnection parameter, resistance and reactance including new energy power station grid entry point interconnection.
In step S2, as grid entry point voltage UPCCDeviate reference value UPCC_refWhen, it needs to be exported according to new energy power station opposite
In the reactive voltage sensitivity S of grid entry point1Determine the reactive power adjustment amount of new energy power station:
In formula, S1For the voltage sensibility that grid entry point is exported relative to new energy power station, UPCCFor grid entry point voltage, UPCC_ref
For voltage reference value, Δ UPCCFor grid entry point voltage real-time change amount.
The reactive power output that new energy power station is adjusted according to the reactive power adjustment amount of new energy power station, so that grid entry point
Voltage restores to voltage reference value.
After the completion of step S3 further include: based on new energy power station reactive power output limit value and exit potential safe operation
Range is corrected reactive power adjustment amount.The new energy power station reactive power adjustment amount being calculated is checked,
It is checked including power station reactive power limit value and power station exit potential is checked.To realize to the power station reactive power tune being calculated
The verification of whole amount, it is ensured that play fast reactive to the greatest extent under the premise of meeting power station reactive power output limit value and adjust energy
Power, ensure new energy power station exit potential within the allowable range effectively support grid entry point voltage stabilization.
If new energy power station reactive power output a, adjusted by reactive power adjustment amount is greater than preset idle
Power output limit value then exports the reactive power adjustment amount of limit value more new energy power station according to reactive power predetermined；
If b, causing exit potential out-of-limit by adjusting new energy power station reactive power, according to new energy power station voltage spirit
The reactive power adjustment amount of sensitivity more new energy power station.
Wherein, as follows according to the reactive power adjustment amount of adjustable reactive power limit value more new energy power station predetermined
Formula:
In formula, QmaxFor new energy power station reactive power maximum value, QminFor new energy power station reactive power minimum value.
According to the reactive power adjustment amount of new energy power station voltage sensibility more new energy power station, such as following formula:
In formula, S2Indicate new energy power station voltage sensibility,For new energy power station exit potential upper limit value,It is new
Energy power station exit potential lower limit value.
The voltage sensibility S that grid entry point is exported relative to new energy power station1With new energy power station voltage sensibility S2Seek
Process is as follows:
It, will be in survey region to the part of nodes for only considering institute's survey region in the finding process of reactive voltage sensitivity
Generator node and load bus and possible reactive compensation infield are considered as injection node, will be every other in system
Node (load bus including other regions) is considered as contact node, carries out further depression of order, specific implementation to Jacobian matrix
It is as follows:
If J is the full rank Jacobian matrix of system polar form, Δ Y and Δ X are respectively system injection variable quantity and shape
Δ Y is divided into two parts, i.e. Δ Y=[Δ Y by state variable quantityIΔYN]T, corresponding Δ X then becomes Δ X=[Δ XIΔXN]T.Its
In, Δ YIWith Δ XIRespectively controlled new energy power station accesses regional node (including new energy power station Egress node and access point)
Injection variable quantity and amount of state variation；ΔYNWith Δ XNThe respectively injection variable quantity and amount of state variation of remaining node.Accordingly
J is divided into 4 parts by ground, i.e.,
Relationship between system injection rate and amount of state variation is
If Δ YN=0, that is, the amount of being actually implanted into only includes Δ YI, then it can be released by formula (8):
Generally, JNNIt is nonsingular, then Δ X can be eliminated by matrix variationN, so as to:
To JSIIt inverts, available following relational expression:
Further, there is the relationship between the node of controlled new energy power station access point area are as follows:
In formula, Δ UWWith Δ θWThe respectively voltage of new energy power station Egress node and phase angle change vector；ΔUCWith Δ θC
The respectively voltage of access point and phase angle change vector；ΔPWWith Δ QWRespectively new energy power station Egress node injects active, nothing
Function change vector (corresponding new energy power station output is idle and the variation of reactive compensation amount)；ΔPCWith Δ QCRespectively access point injects
Active and reactive change vector (corresponding local load or burden without work and the variation of reactive compensation amount).
Main injection rate in new energy power station access area is the active and reactive power of new energy power station output, if only
Consider effect of the reactive power to voltage, then the sensitivity relation of j-th of new energy output reactive power variation are as follows:
S1=A2m+n+i,m+n+j
The sensitivity relation that j-th of new energy power station exit potential changes about itself output reactive power is
S2=Am+j,m+n+j
Calculating to practical power systems analysis shows, when load variations, network topology minor change etc. occur small for system
When disturbance, the information changes such as system sensitivity are little.
Embodiment:
By taking wind power plant as an example, idle control strategy is provided using the present invention and carries out simulating, verifying, if including in test macro
Dry Large Scale Wind Farm Integration, the part for choosing the access of some wind power plant are analyzed as monitor area, are verifying proposed control just
True property and validity.The wiring diagram of selected areas as shown in figure 3, the wind power plant by 134 single-machine capacity 1.5MW variable speed constant frequency
Wind turbines are constituted, and power factor range is ± 0.95, and entire wind power plant is considered as an equivalent wind-power electricity generation when simulating, verifying
Machine.The voltage class of wind power plant Egress node and access point is 110kV, and wind power plant Egress node qualified voltage range is 0.9
~1.1p.u., access point dead zone voltage range are ± 0.01p.u. on the basis of initial steady state working voltage value.It is disturbed in wind speed
Under two kinds of access point load variations disturbances, rung by the wind power plant voltage power-less under comparative analysis wind power plant following two mode
Answer: 1. mode 1, all wind power plants are all made of constant power factor control mode, and constant power factor remains 1；2. mode 2 is supervised
Apparent wind electric field uses constant power factor controlling party using the idle control strategy based on voltage sensibility, remaining wind power plant is proposed
Formula.
(1) wind speed changes
Multiple wind power plants in wind power plant access power grid as shown in Figure 2 are simulated in simulation process to be existed by gradual change wind disturbance, wind speed
10~40s is down to 9m/s from 14m/s, emulates duration 150s.Fig. 4 is the simulation curve of wind power plant voltage power-less when wind speed changes.
As seen from Figure 4, the initial steady state working voltage of wind power plant Egress node and access point is respectively 1.035 Hes
1.028pu, when wind speed changes, 0~35s, access point voltage is all made of constant in dead zone range under 2 mode of mode 1 and mode
Power factor controlling, therefore curve co-insides；After 35s, after access point voltage runs off controlling dead error, under 1 mode of mode, by invariable power because
Number control is limited to 0 for wind power plant is idle, can not provide the voltage stabilization in access point area necessary support, and use institute
Mention voltage & var control strategy, wind power plant has adjusted a small amount of idle by within regulating and controlling voltage to dead zone voltage range and final steady
It is scheduled on the voltage value controlled compared with 1 mode of mode closer to initial launch point.
(2) access point load variations
Access point local load variations are simulated in simulation process, access point local load is increased continuously in 10~20s
50%, emulate duration 100s.Wind power plant voltage power-less simulation curve when Fig. 5 is load variations.
As seen from Figure 5, the initial steady state working voltage of wind power plant Egress node and access point is respectively 1.035 Hes
1.028p.u., when load variations, 0~14s, access point voltage is all made of perseverance under 2 mode of mode 1 and mode in dead zone range
Determine power factor controlling, therefore curve co-insides；After 14s, after access point voltage runs off controlling dead error, under 1 mode of mode, by invariable power
Factor control is limited to 0 for wind power plant is idle, can not use the necessary support of the voltage stabilization in access point area offer
The large-scale new energy power station voltage & var control strategy based on voltage sensibility is mentioned, is monitored wind power plant in the feelings of load variations
A large amount of reactive power is provided to access point under condition, access point restores substantially to initial voltage.During wind power plant regulation, wind
Electric field output reactive power is 0.25p.u., and wind power plant access point voltage stabilization is in 1.025p.u., wind power plant Egress node voltage
1.08p.u. is risen to, still within operational envelope.The result shows that monitored wind power plant can be limited in safe operation
Very effective voltage support is provided to access point area in range to act on.
Based on the same inventive concept, the application also proposes a kind of powerless control system of new energy power station, comprising:
First computing module, for according to measure and control device operation information on the spot and new energy power station grid entry point interconnection ginseng
Number calculates grid entry point voltage；
Second computing module, for being based on the grid entry point Voltage Reference when grid entry point voltage deviation voltage reference value
The voltage sensibility that value and grid entry point are exported relative to new energy power station, calculates the reactive power adjustment amount of new energy power station；
Control module, the reactive power for adjusting new energy power station according to the reactive power adjustment amount export.
In addition, powerless control system further include:
Correction module, it is right for exporting limit value and exit potential operational envelope based on new energy power station reactive power
Reactive power adjustment amount is corrected.
Wherein, the first computing module includes:
Computing unit, for determining grid entry point voltage by following formula:
In formula, UPCCFor grid entry point voltage, PRAnd QRThe respectively active power and reactive power of new energy power station output, UR
Busbar voltage is exported for newly energy power station, R and X are respectively resistance and the reactance of new energy power station grid entry point interconnection.
Second computing module includes:
Determination unit, for determining the reactive power adjustment amount of new energy power station by following formula:
In formula, S1For the voltage sensibility that grid entry point is exported relative to new energy power station, UPCCFor grid entry point voltage, UPCC_ref
For voltage reference value, Δ UPCCFor grid entry point voltage real-time change amount.
Correction module includes:
First updating unit, if the new energy power station reactive power output for adjusting by reactive power adjustment amount is greater than
Preset reactive power exports limit value, then exports the idle of limit value more new energy power station according to reactive power predetermined
Power adjustment；
Second updating unit, if for causing exit potential out-of-limit by adjusting new energy power station reactive power, basis
The reactive power adjustment amount of new energy power station voltage sensibility more new energy power station.
Wherein, the first updating unit includes: the first update subelement again, for according to adjustable reactive power predetermined
The reactive power adjustment amount of limit value more new energy power station, such as following formula:
In formula, QRFor the reactive power of new energy power station output, QmaxFor new energy power station reactive power maximum value, QminFor
New energy power station reactive power minimum value.
Second updating unit includes: the second update subelement again, for updating energy according to new energy power station voltage sensibility
The reactive power adjustment amount in source power station, such as following formula:
In formula, S2Indicate new energy power station voltage sensibility,For new energy power station exit potential upper limit value,It is new
Energy power station exit potential lower limit value.
It should be understood by those skilled in the art that, embodiments herein can provide 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, it wherein includes the computer of computer usable program code that the application, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The application is referring to method, the process 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 every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or 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 counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Claims (13)
1. a kind of powerless control method of new energy power station, which is characterized in that the described method includes:
According to measure and control device operation information on the spot and new energy power station grid entry point interconnection parameter, grid entry point voltage is calculated；
When the grid entry point voltage deviation voltage reference value, based on the grid entry point voltage reference value and grid entry point relative to new
The voltage sensibility of energy power station outlet, calculates the reactive power adjustment amount of new energy power station；
The reactive power output of new energy power station is adjusted according to the reactive power adjustment amount.
2. the method as described in claim 1, which is characterized in that determine grid entry point voltage by following formula:
In formula, UPCCFor grid entry point voltage, PRAnd QRThe respectively active power and reactive power of new energy power station output, URIt is new
Energy power station exports busbar voltage, and R and X are respectively resistance and the reactance of new energy power station grid entry point interconnection.
3. the method as described in claim 1, which is characterized in that determine that the reactive power of new energy power station adjusts by following formula
Amount:
In formula, S1For the voltage sensibility that grid entry point is exported relative to new energy power station, UPCCFor grid entry point voltage, UPCC_refFor electricity
Press reference value, Δ UPCCFor grid entry point voltage real-time change amount.
4. the method as described in claim 1, which is characterized in that described to adjust new energy power station according to reactive power adjustment amount
After reactive power output further include: reactive power output limit value and exit potential based on new energy power station are safely operated model
It encloses, the reactive power adjustment amount is corrected, comprising:
If it is defeated that the new energy power station reactive power output adjusted by reactive power adjustment amount is greater than preset reactive power
Limit value out then exports the reactive power adjustment amount of limit value more new energy power station according to reactive power predetermined；
If causing exit potential out-of-limit by adjusting new energy power station reactive power, more according to new energy power station voltage sensibility
The reactive power adjustment amount of new energy power station.
5. method as claimed in claim 4, which is characterized in that described to be updated according to adjustable reactive power limit value predetermined
The reactive power adjustment amount in energy power station, such as following formula:
In formula, QRFor the reactive power of new energy power station output, QmaxFor new energy power station reactive power maximum value, QminFor new energy
Source power station reactive power minimum value.
6. method as claimed in claim 4, which is characterized in that described according to new energy power station voltage sensibility more new energy electricity
The reactive power adjustment amount stood, such as following formula:
In formula, S2Indicate new energy power station voltage sensibility,For new energy power station exit potential upper limit value,For new energy
Power station exit potential lower limit value.
7. a kind of powerless control system of new energy power station characterized by comprising
First computing module, for according to measure and control device operation information and new energy power station grid entry point interconnection parameter on the spot, meter
Calculate grid entry point voltage；
Second computing module, for when grid entry point voltage deviation voltage reference value, based on the grid entry point voltage reference value and
The voltage sensibility that grid entry point is exported relative to new energy power station calculates the reactive power adjustment amount of new energy power station；
Control module, the reactive power for adjusting new energy power station according to the reactive power adjustment amount export.
8. system as claimed in claim 7, which is characterized in that the powerless control system further include:
Correction module, for exporting limit value and exit potential operational envelope based on new energy power station reactive power, to idle
Power adjustment is corrected.
9. system as claimed in claim 7, which is characterized in that first computing module includes: computing unit, for passing through
Following formula determines grid entry point voltage:
In formula, UPCCFor grid entry point voltage, PRAnd QRThe respectively active power and reactive power of new energy power station output, URIt is new
Energy power station exports busbar voltage, and R and X are respectively resistance and the reactance of new energy power station grid entry point interconnection.
10. system as claimed in claim 7, which is characterized in that second computing module comprises determining that unit, for leading to
Cross the reactive power adjustment amount that following formula determines new energy power station:
In formula, S1For the voltage sensibility that grid entry point is exported relative to new energy power station, UPCCFor grid entry point voltage, UPCC_refFor electricity
Press reference value, Δ UPCCFor grid entry point voltage real-time change amount.
11. system as claimed in claim 8, which is characterized in that the correction module includes:
First updating unit, if the new energy power station reactive power output for adjusting by reactive power adjustment amount is greater than in advance
The reactive power of setting exports limit value, then the reactive power of limit value more new energy power station is exported according to reactive power predetermined
Adjustment amount；
Second updating unit, if for causing exit potential out-of-limit by adjusting new energy power station reactive power, according to new energy
The reactive power adjustment amount of source power station voltage sensibility more new energy power station.
12. system as claimed in claim 11, which is characterized in that first updating unit includes: the first update subelement,
For the reactive power adjustment amount according to adjustable reactive power limit value more new energy power station predetermined, such as following formula:
In formula, QRFor the reactive power of new energy power station output, QmaxFor new energy power station reactive power maximum value, QminFor new energy
Source power station reactive power minimum value.
13. system as claimed in claim 11, which is characterized in that second updating unit includes: the second update subelement,
For the reactive power adjustment amount according to new energy power station voltage sensibility more new energy power station, such as following formula:
In formula, S2Indicate new energy power station voltage sensibility,For new energy power station exit potential upper limit value,For new energy
Power station exit potential lower limit value.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111064179A (en) * | 2019-10-22 | 2020-04-24 | 国网山东省电力公司电力科学研究院 | Comprehensive control method and system for ensuring voltage safety in power recovery stage of multi-feed-in direct current system |
| CN111835017A (en) * | 2019-04-23 | 2020-10-27 | 中国电力科学研究院有限公司 | Reactive voltage coordination control method and device for new energy power station |
| CN112260327A (en) * | 2020-10-22 | 2021-01-22 | 国网河南省电力公司电力科学研究院 | New energy reactive power support analysis method based on extra-high voltage alternating current-direct current power grid |
| CN113067342A (en) * | 2021-05-17 | 2021-07-02 | 阳光电源股份有限公司 | Grid-connected point voltage fluctuation suppression method and new energy power station |
| CN113765160A (en) * | 2021-11-08 | 2021-12-07 | 北京智芯微电子科技有限公司 | Distributed energy and grid-connected reactive power control method and device thereof, and storage medium |
| CN113991732A (en) * | 2021-10-21 | 2022-01-28 | 国电南瑞科技股份有限公司 | Distributed power distribution network double-target voltage control method and device |
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| CN105720585A (en) * | 2014-12-02 | 2016-06-29 | 国家电网公司 | Reactive power control method and reactive power control system for wind farm clusters |
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| CN111835017A (en) * | 2019-04-23 | 2020-10-27 | 中国电力科学研究院有限公司 | Reactive voltage coordination control method and device for new energy power station |
| CN111835017B (en) * | 2019-04-23 | 2023-11-03 | 中国电力科学研究院有限公司 | Reactive voltage coordination control method and device for new energy power station |
| CN111064179A (en) * | 2019-10-22 | 2020-04-24 | 国网山东省电力公司电力科学研究院 | Comprehensive control method and system for ensuring voltage safety in power recovery stage of multi-feed-in direct current system |
| WO2021077753A1 (en) * | 2019-10-22 | 2021-04-29 | 国网山东省电力公司电力科学研究院 | Comprehensive control method and system that ensure voltage safety in power recovery stage of multiple feed-in dc system |
| CN112260327A (en) * | 2020-10-22 | 2021-01-22 | 国网河南省电力公司电力科学研究院 | New energy reactive power support analysis method based on extra-high voltage alternating current-direct current power grid |
| CN113067342A (en) * | 2021-05-17 | 2021-07-02 | 阳光电源股份有限公司 | Grid-connected point voltage fluctuation suppression method and new energy power station |
| CN113067342B (en) * | 2021-05-17 | 2024-05-14 | 阳光电源股份有限公司 | Grid-connected point voltage fluctuation suppression method and new energy power station |
| CN113991732A (en) * | 2021-10-21 | 2022-01-28 | 国电南瑞科技股份有限公司 | Distributed power distribution network double-target voltage control method and device |
| CN113991732B (en) * | 2021-10-21 | 2023-11-28 | 国电南瑞科技股份有限公司 | Double-target voltage control method and device for distributed power distribution network |
| CN113765160A (en) * | 2021-11-08 | 2021-12-07 | 北京智芯微电子科技有限公司 | Distributed energy and grid-connected reactive power control method and device thereof, and storage medium |
| CN114243721A (en) * | 2021-11-23 | 2022-03-25 | 国电南瑞科技股份有限公司 | Reactive compensation method and system for photovoltaic power station |
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