CN108736521A - A kind of wind power plant Energy Management System with power grid access control function - Google Patents
A kind of wind power plant Energy Management System with power grid access control function Download PDFInfo
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- H02J3/386—
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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
- H02J3/48—Controlling the sharing of the in-phase component
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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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Abstract
The present invention relates to the wind power plant control technology fields in new energy power generation technology,Especially a kind of wind power plant Energy Management System with power grid access control function,The GPS system of unified clock is provided including station level computer monitoring system and for the equipment in system,Station level computer monitoring system is connected with existing formation data measurement and control network and substation's monitoring and protection system by wall data communication network,The wall data communication network includes power grid access control unit and communication control unit,Station level computer monitoring system,Existing formation data measurement and control network and substation's monitoring and protection system are connect with power grid access control unit and communication control unit signal,The present invention can carry out unified planning in wind farm level to the real-time output of wind power plant,Be conducive to integrated wind plant to run with the mutually coordinated cooperation of access area power grid.
Description
Technical field
The present invention relates to the wind power plant control technology fields in new energy power generation technology, more particularly to one kind to be connect with power grid
Enter the wind power plant Energy Management System of control function.
Background technology
In the past 10 years, wind-power electricity generation becomes clean energy resource with fastest developing speed with annual growth in the whole world more than 30%.Mesh
Before, the core control technology of wind-power electricity generation rests in always in overseas enterprise's hand, the cores control technology such as wind farm monitoring system
Not yet realize that production domesticization, the relevant controls product such as unit control system, wind farm monitoring system are completely dependent on import.With wind-powered electricity generation
The drawbacks of increase of number and the expansion of scale, the wind farm monitoring system operational management under one's control to wind power plant are brought
Become clear day by day.
Wind power plant central monitoring is used to collect the operation for neutralizing remote monitoring Wind turbines and wind power plant with tele-control system,
With present information and mechanics of communication, real-time collecting, analysis and wind behaviour and unit, the wind power plant operation of reporting each wind power plant
Condition monitor data, automatic or instruction according to administrative staff's feedback to Wind turbines and wind power plant operation carry out efficiency optimization and
Safety guarantee controls.Existing wind farm monitoring system, for example, Vestas companies of Denmark VestasOnline, generally by three
It is grouped as：Centralized control (station level), on the spot control (existing stratum), distant place control.Multiple functions may be implemented in monitoring system, such as
Data acquisition and procession function, control function, warning function, picture show, data statistics, printing reports, operating right, a variety of
Curve is shown, meets the various needs of operations staff, operations staff is allow to be monitored in wind power plant Central Control Room or a distant place
With control, while wind-powered electricity generation operator can carry out remote monitoring and pipe by the system to the operating condition of the wind power plant of various regions
Reason solves the problems, such as to be difficult to be managed collectively the wind power plant of various regions before wind-powered electricity generation operator, and can be in wind power plant
A variety of Wind turbines carry out unified monitoring, realize the unattended target of wind power plant.
Currently, the remote monitoring and traffic-operating period of the wind power plant of domestic wind-powered electricity generation operator subordinate can only pass through Wind turbines
Respectively mating monitoring software is realized for manufacturer, due to the diversity of domestic Wind turbines type, and the control of each type
System is all different, is required for a set of corresponding centralized control software and corresponding remote monitoring software, these softwares are with factory
The difference of quotient and it is different, and without the wind farm access control work(taken into account cooperation between wind power plant and power grid and run
Can, it can not be with the dispatching of power netwoks control system interface in China.
Access electric system, the total capacity of wind power plant is concentrated generally to have currently, China's wind power plant is mostly large-scale wind power field
Tens MW to hundreds of MW will generally create mating substation while building wind power plant.The prison of substation and wind power plant
Control is all in a monitoring room, therefore a monitoring room can possess a set of monitoring system of electric substation and several set wind power plants monitoring system
System, cannot achieve information sharing and merges, this brings great inconvenience to the operational management and maintenance of wind power plant between each other.
Invention content
The purpose of the present invention is to solve disadvantages existing in the prior art, and the one kind proposed has power grid access control
The wind power plant Energy Management System of function processed.
To achieve the goals above, present invention employs following technical solutions：
Design a kind of wind power plant Energy Management System with power grid access control function, including station level computer monitoring
Network and the GPS system that unified clock is provided for the equipment in system, station level computer monitoring system is by being spaced layer data
Communication network is connected with existing formation data measurement and control network and substation's monitoring and protection system, the wall data communication network packet
Include power grid access control unit and communication control unit, station level computer monitoring system, existing formation data measurement and control network and change
Power station monitoring and protection system accesses control unit with power grid and communication control unit signal is connect, and the power grid access control is single
Member includes wind farm grid-connected control unit, wind power plant active power output control unit, wind power plant is idle output control unit, wind power plant
System frequency regulation unit, wind-powered electricity generation field voltage regulation unit.
Preferably, station level computer monitoring system includes the SCADA clothes being connect with wall data communication network signal
Business device, operator workstation, five anti-work stations, protection's teacher work station, management work station, wind-powered electricity generation forecast work station, Web service
Device, wind energy turbine set operator training system, the network printer.
Preferably, existing formation data measurement and control network include the Wind turbines being connect with wall data communication network signal,
Anemometer tower, Wind turbines are connect with local control unit signal.
Preferably, substation's monitoring and protection system include the measure and control device being connect with wall data communication network signal,
Protective device, third party's smart machine.
Preferably, the wind farm grid-connected control unit includes the following steps：
A1, judge whether real-time grid frequency f meets wind farm grid-connected frequency requirement：49Hz<f<51Hz, if meet into
Enter step A2, otherwise, stops wind farm grid-connected；
A2, judge whether wind power plant access point real-time voltage V meets wind farm grid-connected voltage request：For 110kV systems
System, 105kV<V<115kV, for 220kV systems, 210kV<V<230kV enters step A3 if meeting, and otherwise, stops wind power plant
It is grid-connected；
A3, wind power plant are gradually grid-connected by the rate per minute for increasing by 20% installed capacity, and reaching maximum at that time can be with active
Contribute 90% or more when, complete cutting-in control process.
Preferably, the wind power plant active power output control unit includes the following steps：
B1, receive active power output regulation and control instruction, if active power output regulation and control instruction comes from grid dispatching center, set judgement symbol
Flag is 0, if active power output regulation and control instruction comes from existing stratum, it is 1 to set judgement symbol flag；
B2, the active maximum rate of change λ according to setting are calculated the real-time active power output P of wind power plant per minute by formula (1)：
P=Ppre+λ×Pmax (1)
In formula, PpreFor the real-time active power output of wind power plant of previous minute, PmaxFor the maximum active power output of wind power plant, work as wind
Electric field installed capacity Pins<When 30MW, λ Prmax≤ 6MW/min, as 30MW≤PinsWhen≤150MW, λ Prmax≤Pins/ 5, when
Pins>When 150MW, λ Prmax≤30MW/min；
B3, work as flag=0, enter step d, work as flag=1, verified by formula (2) real-time output active to wind power plant：
P≤0.9Pava (2)
In formula, PavaMaximum active power output can be used to enter step B4 if meeting formula (2) for wind power plant, otherwise, exit control
System；
B4, the real-time active power output of obtained wind power plant is assigned to every Wind turbines by Wind turbines capacity ratio, into
A wind power plant active power output control is completed in the active regulation and control of row；
B5, the real-time active power output of wind power plant after regulation and control is sampled, if meeting the requirement of active power output regulation and control instruction,
Control is exited, next regulation and control instruction is waited for, otherwise, returns to step b.
Preferably, the idle output control unit of the wind power plant includes the following steps：
C1, the setting idle power generating value of wind power plant；
C2, idle power generating value is assigned to every Wind turbines by Wind turbines capacity ratio, carries out idle regulation and control.
Preferably, the windfarm system frequency regulation unit includes the following steps：
D1, judge whether real-time grid frequency f meets the pass frequency requirement of operation of power networks：49.5Hz<f<50.2Hz if
Meet, D5 is entered step, if not satisfied, entering step D2；
D2, the active maximum rate of change λ according to setting, calculate the real-time active power output of wind power plant per minute, if 47Hz<f<
49.5Hz increases wind power plant active power output to P by formula (1)：
P=Ppre+λ×Pmax (1)
In formula, PpreFor the real-time active power output of wind power plant of previous minute, PmaxFor the maximum active power output of wind power plant, work as wind
Electric field installed capacity Pins<When 30MW, λ Prmax≤ 6MW/min, as 30MW≤PinsWhen≤150MW, λ Prmax≤Pins/ 5, when
Pins>When 150MW, λ Prmax≤ 30MW/min, if 50.2Hz<f<51Hz reduces wind power plant active power output to P by formula (3)：
If f<47Hz or f>51Hz, wind power plant 40% real-time active power output of reduction per minute；
D3, judge whether wind power plant active power output P meets wind power plant service requirement, if P>PmaxOr P<Pmin, then wind power plant
Active power output P is modified to：
In formula, PminFor wind power plant minimum active power output；
D4, the real-time active power output of obtained wind power plant is assigned to every Wind turbines by Wind turbines capacity ratio, into
The active regulation and control of row, complete a windfarm system frequency adjusting control；
D5, control delay is set, the lower secondary control of Time-delayed trigger is controlled by judgement, returns to step D1.
Preferably, the wind-powered electricity generation field voltage regulation unit includes the following steps：
E1, the quasi- voltage reference value V of biddingrefFor 1.0p.u., wind power plant access point real-time voltage V is read, if meeting
0.9Vref≤V≤1.1VrefCondition, wind power plant still press current idle output operation, if idle without voltage & var control
Adjustment marks nCount=0 enters step E2 if being unsatisfactory for above-mentioned condition；
E2, work as nCount=0, enter step E5, otherwise enter step E3；
E3, voltage change Δ V is calculated by formula (5)：
Δ V=Vk+1-Vk (5)
In formula, Vk+1For the real-time voltage value after+1 idle regulation and control of kth, VkFor the real-time voltage after the idle regulation and control of kth time
Value；
E4, the system voltage variation tendency after idle adjustment is judged, if Δ V/Vk>0.1, it corrects the idle classification of wind power plant and adjusts
Whole amount Δ QstepFor 0.9 Δ Qstep, E5 is entered step, otherwise, works as V>VrefAnd Δ V>When 0, Δ Q is correctedstepIt is 1.2~1.4
ΔQstep, work as V<VrefAnd Δ V<When 0, Δ Q is correctedstepFor 1.2~1.4 Δ Qstep, in addition to above-mentioned three kinds of situations, Δ QstepDimension
It is constant to hold initial value；
E5, the reactive power that adjustment wind power plant is classified according to formula (6) are contributed：
Q '=Q+ Δs Qstep (6)
In formula, Q ' is the idle output of wind power plant after adjustment, and Q is the idle output of current wind power plant, Δ QstepFor wind power plant
Idle classification adjustment amount, is chosen as the 10%~50% of wind power plant reactive capability；
E6, judge whether the idle output Q ' of wind power plant after adjustment meets wind power plant service requirement, if Q '>QmaxOr Q '<
Qmin, then the idle output Q of wind power plant be modified to：
In formula, QmaxAnd QminThe respectively idle output maximum value of wind power plant and minimum value；
E7, obtained wind power plant reactive power is contributed is assigned to every Wind turbines by Wind turbines capacity ratio, into
Regulation and control that row is idle, nCount+1 complete First air voltage of electric field adjusting control；
E8, control delay is set, the lower secondary control of Time-delayed trigger is controlled by judgement, returns to step E1.
Preferably, it is to be calculated positioned at station level to have wind energy turbine set operator training system, the system in the station level
The software architecture of machine monitoring network is responsible for carrying out analogue simulation to the operating status of wind power plant.
A kind of wind power plant Energy Management System with power grid access control function proposed by the present invention, advantageous effect exist
In：
(1) present invention provides the wind farm including five associated control elements for wind power plant Energy Management System and connects
Enter control unit, there is electric power output in real time and the operation control function of more powerful wind power plant access power grid, it can be preferable
The operation data of wind power plant is sent to power network dispatching system, and is from scheduling by ground and China's dispatching of power netwoks control system interface
System receives the dispatch command of power grid, according to the operating mode of demand and wind power plant that the requirement of grid dispatching center, area power grid are run
It carries out electric power output in real time to control with operation, unified planning can be carried out to the real-time output of wind power plant in wind farm level, favorably
It is run in integrated wind plant and the mutually coordinated cooperation of access area power grid.
(2) wind farm of the invention access control unit and communication control unit, as station level and existing stratum it
Between wall, so that the data information of wind farm monitoring system and monitoring system of electric substation is shared and is merged, utilize the two
Data realize Comprehensive Control, be conducive to the management and operation of wind power plant.
Description of the drawings
Fig. 1 is a kind of wind power plant of the wind power plant Energy Management System with power grid access control function proposed by the present invention
Power grid accesses control unit composition frame chart；
Fig. 2 is a kind of system frame of the wind power plant Energy Management System with power grid access control function proposed by the present invention
Figure；
Fig. 3 is the flow chart of wind power plant active power output control unit in Fig. 1；
Fig. 4 is the flow chart of Fig. 1 apoplexy electric field frequency control units；
Fig. 5 is the flow chart of Fig. 1 apoplexy voltage of electric field control units；
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
Referring to Fig.1-2, a kind of wind power plant Energy Management System with power grid access control function, including station level calculate
Machine monitoring network and the GPS system that unified clock is provided for the equipment in system, station level computer monitoring system pass through interval
Layer data communication network is connected with existing formation data measurement and control network and substation's monitoring and protection system, wall data communication network
Access control unit and communication control unit including power grid, station level computer monitoring system, existing formation data measurement and control network and
Substation's monitoring and protection system accesses control unit with power grid and communication control unit signal is connect, and power grid accesses control unit
Including wind farm grid-connected control unit, wind power plant active power output control unit, wind power plant is idle output control unit, wind power plant system
Frequency of uniting regulation unit, wind-powered electricity generation field voltage regulation unit.
Station level computer monitoring system includes the SCADA servers being connect with wall data communication network signal, behaviour
Work person's work station, five anti-work stations, protection's teacher work station, management work station, wind-powered electricity generation forecast work station, Web server, wind power plant
Operator's training system, the network printer.
Existing formation data measurement and control network includes Wind turbines, the anemometer tower being connect with wall data communication network signal,
Wind turbines are connect with local control unit signal.
Substation's monitoring and protection system includes the measure and control device being connect with wall data communication network signal, protection dress
It sets, third party's smart machine.
Embodiment one
The present invention have power grid access control function wind power plant Energy Management System (WEMS) in for wind power plant and
Net control unit.
Always active capacity is 100MW to the integrated wind plant, and reactive capability is ± 33.5MVA, by 67 active capacity of single machine
It is constituted for 1.5MW, the double-fed asynchronous Wind turbines that reactive capability is ± 0.5MVA, 110kV systems is accessed through line attachment, it is grid-connected
Period wind friction velocity disclosure satisfy that output of wind electric field completely sends out requirement.
It is 50Hz to measure real-time grid frequency f, meets wind farm grid-connected frequency requirement, then extract wind power plant access point
Real-time voltage is 112kV, meets wind farm grid-connected voltage request.Since two grid-connected conditions are satisfied by, at this point, wind power plant is pressed
The rate per minute for increasing by 20% installed capacity is grid-connected, and at the 4th minute, wind farm grid-connected capacity reaches 80MW, works as less than reaching
When maximum can use the 90% of active power output 100MW, outputs is continued growing, until the 5th minute wind farm grid-connected capacity be up to 100MW,
The 100% of active power output can be used by reaching maximum at that time, complete cutting-in control process.
Embodiment two
With reference to Fig. 3, the present invention is used for wind in the wind power plant Energy Management System (WEMS) with power grid access control function
Electric field active power output control unit.
Always active capacity is 100MW to the integrated wind plant, and reactive capability is ± 33.5MVA, by 67 active capacity of single machine
It is constituted for 1.5MW, the double-fed asynchronous Wind turbines that reactive capability is ± 0.5MVA, the initial active power output of wind power plant is 60MW, often
The initial active power output of platform Wind turbines is 0.89MW, and the active change rate of maximum per minute is the 2% of specified active capacity.Wind speed
Variation makes the active power output of wind power plant increase to 70MW, and due to the limitation of maximum active change rate, wind power plant will gradually adjust it
Active power output obtains wind power plant active power output adjustment 2MW per minute according to formula (1), i.e. every Wind turbines adjustment per minute is active
Output 0.03MW.In this way, by regulation and control in 5 minutes, active power output can be adjusted to 70MW by wind power plant, completed wind speed variation and wanted
The active power adjustment amount asked, at this point, the active power output of every Wind turbines is 1.045MW.
Embodiment three
The present invention is idle for wind power plant in the wind power plant Energy Management System (WEMS) with power grid access control function
Output control unit.
Always active capacity is 100MW to the integrated wind plant, and reactive capability is ± 33.5MVA, by 67 active capacity of single machine
It is constituted for 1.5MW, the double-fed asynchronous Wind turbines that reactive capability is ± 0.5MVA, initial idle contribute of wind power plant is 0.At this point,
The idle power generating value of wind power plant manually is set as 20MVA, then idle output control unit is arrived the value by unit capacity pro rate
Each Wind turbines, i.e. every Wind turbines adjust idle output 0.3MVA, can meet the requirement of idle output in this way.
Example IV
With reference to Fig. 4, the present invention is used for wind in the wind power plant Energy Management System (WEMS) with power grid access control function
Electric field system frequency regulation unit.
Always active capacity is 100MW to the integrated wind plant, and reactive capability is ± 33.5MVA, by 67 active capacity of single machine
It is constituted for 1.5MW, the double-fed asynchronous Wind turbines that reactive capability is ± 0.5MVA, the initial active power output of wind power plant is 80MW, often
Platform Wind turbines active power output is 1.19MW.Further, since frequency is system overall situation amount, i.e. system frequency is identical, therefore can
To export the frequency of substation's actual measurement according to wind power plant as system frequency amount.Using frequency controlling step as shown in Figure 5 into
Row control.First, it is 50.9Hz to measure system frequency, and between 50.2Hz~51Hz, exception occurs in frequency, needs wind power plant tune
Whole active power output is supported system；Secondly, per minute from grid dispatching center or substation operator extraction by WGPICs
Maximum active change rate is 20MW；Since according to the above formula in formula (3), acquiring wind power plant active power output variation per minute is
22.4MW is more than 20MW, therefore is taken as 20MW；The active power output of wind power plant is reduced to 60MW at this time, by the active power output tune of 20MW
It is every Wind turbines that whole amount, which is assigned to by Wind turbines capacity ratio after each Wind turbines, reduces 0.3MW, every after adjustment
The active power output of Wind turbines is 0.89MW, since the frequency modulation unit in the main power grid of wind-powered electricity generation place connection also assists in frequency modulation, is passed through
After crossing primary active regulation and control, system frequency is restored to 50.5Hz.After 1s is delayed, wind power plant exports the actual measurement system frequency of substation
Rate is 50.4Hz, still extremely, repeats the above steps and carries out the adjusting of wind power plant active power output.At this point, according to upper in formula (3)
Formula acquires wind power plant active power output variation 4.8MW per minute, and the active power output of wind power plant is down to 55.2MW at this time, by 4.8MW
Active power output adjustment amount be assigned to every Wind turbines after each Wind turbines by Wind turbines capacity ratio and reduce 0.07MW,
The active power output of every Wind turbines is 0.82MW after adjustment, then coordinates the frequency modulation of main power grid, and system frequency is restored to 50.1Hz,
In normal range (NR).Using the wind power plant Energy Management System of invention, the specific demand of system operation can be fully taken into account, actively
Participation system frequency modulation.
Embodiment five
With reference to Fig. 5, the present invention is used for wind in the wind power plant Energy Management System (WEMS) with power grid access control function
Voltage of electric field regulation unit.
Always active capacity is 100MW to the integrated wind plant, and reactive capability is ± 33.5MVA, by 67 active capacity of single machine
It is constituted for 1.5MW, the double-fed asynchronous Wind turbines that reactive capability is ± 0.5MVA, wind power plant initially presses permanent unity power factor side
Formula is run, and idle contribute is 0, and the initial idle output of every Wind turbines is also 0, and the idle adjustment amount of often step of wind power plant is
5MVA.Further, since voltage is local quantity, i.e., idle adjusting can only have an impact voltage in the regional area of very little,
Therefore the Reactive-power control of wind power plant only takes into account the voltage influence of the regional partial electric grid of wind power plant access, specifically when control, selects wind-powered electricity generation
Field access substation low-voltage side voltage is controlled as control object using frequency controlling step as shown in Figure 5.First,
The measurement voltage for reading wind power plant access substation is 0.85p.u., and beyond working voltage range is allowed, setting nCount at this time is
0, the wind power plant idle output 5MVA of adjustment is calculated to obtain according to formula (6), idle contribute of wind power plant after adjustment is 5MVA, the electricity per typhoon
The idle output of unit adjusts 0.075MVA, and the idle output of every Wind turbines is 0.075MVA after adjustment.After adjustment, delay
0.1s, it is 0.875p.u. to measure wind power plant access substation low-voltage side voltage again, and still exceeding allows working voltage range,
Set at this time nCount be 1, according to formula (6) calculate wind power plant adjusts idle output 5MVA again, the wind power plant after adjustment is idle
It is 10MVA to contribute, and the idle output of every Wind turbines adjusts 0.075MVA, and the idle output of every Wind turbines is after adjustment
0.15MVA.After adjustment, be delayed 0.1s, and it is 0.872p.u. to measure wind power plant access substation low-voltage side voltage, beyond allowing to transport
Row voltage range, it is 2 to set nCount at this time, and Δ V is calculated to obtain according to formula (5)<0, after illustrating real-time voltage less than last time regulation and control
Voltage, idle adjustment amount is insufficient, and voltage continues to deteriorate, then it is 7MVA, the wind-powered electricity generation after adjustment to correct and often walk idle output adjustment amount
Idle contribute is 17MVA, and every Wind turbines adjust idle output 0.104MVA, after adjustment every Wind turbines it is idle go out
Power is 0.254MVA.After adjustment, be delayed 0.1s, and it is 0.894p.u. to measure wind power plant access substation low-voltage side voltage, slightly below
The lower limit for allowing working voltage, it is 3 to set nCount, and Δ V is calculated to obtain according to formula (5)>0, illustrate that real-time voltage regulated and controled higher than last time
Voltage, voltage gradually improves, and wind power plant continues to adjust idle output 7MVA, and the wind power plant after adjustment is idle to contribute and be
24MVA, every Wind turbines adjust idle output 0.104MVA, and the idle output of every Wind turbines is after adjustment
0.358MVA.After adjustment, by the delay of 0.1s, it is 0.921p.u. that wind power plant, which accesses substation low-voltage side measurement voltage, is restored
To normal voltage range.
Communication control unit uses Nanjing NanRui Group Co., Ltd NS3000 sequence of communications control systems in embodiment, should
System includes configuring configuration and debugging emulation function, friendly embedded color graphics interface, sequential control and logic blocking control
Function processed, the communication of various measure and control devices and control, the both at home and abroad communications of various protection control devices and control, stipulations modulus of conversion
Block, database management module and remote diagnostic and safeguard service function.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of wind power plant Energy Management System with power grid access control function, including station level computer monitoring system and
The GPS system of unified clock is provided for the equipment in system, station level computer monitoring system passes through wall data communication network
Network is connected with existing formation data measurement and control network and substation's monitoring and protection system, it is characterised in that：The interval layer data communication
Network includes power grid access control unit and communication control unit, station level computer monitoring system, existing formation data tracking and command network
Network and substation's monitoring and protection system are connect with power grid access control unit and communication control unit signal, the power grid access
Output control unit that control unit includes wind farm grid-connected control unit, wind power plant active power output control unit, wind power plant is idle,
Windfarm system frequency regulation unit, wind-powered electricity generation field voltage regulation unit.
2. a kind of wind power plant Energy Management System with power grid access control function according to claim 1, feature
It is：Station level computer monitoring system includes the SCADA servers being connect with wall data communication network signal, operator
Work station, five anti-work stations, protection's teacher work station, management work station, wind-powered electricity generation forecast work station, Web server, wind power plant operation
Member's training system, the network printer.
3. a kind of wind power plant Energy Management System with power grid access control function according to claim 1, feature
It is：Existing formation data measurement and control network includes Wind turbines, the anemometer tower being connect with wall data communication network signal, wind-powered electricity generation
Unit is connect with local control unit signal.
4. a kind of wind power plant Energy Management System with power grid access control function according to claim 1, feature
It is：Substation's monitoring and protection system includes the measure and control device being connect with wall data communication network signal, protective device,
Tripartite's smart machine.
5. a kind of wind power plant Energy Management System with power grid access control function according to claim 1, feature
It is, the wind farm grid-connected control unit includes the following steps：
A1, judge whether real-time grid frequency f meets wind farm grid-connected frequency requirement：49Hz<f<51Hz enters step if meeting
Otherwise rapid A2 stops wind farm grid-connected；
A2, judge whether wind power plant access point real-time voltage V meets wind farm grid-connected voltage request：For 110kV systems,
105kV<V<115kV, for 220kV systems, 210kV<V<230kV enters step A3 if meeting, and otherwise, stops wind power plant simultaneously
Net；
A3, wind power plant are gradually grid-connected by the rate per minute for increasing by 20% installed capacity, and active power output can be used by reaching maximum at that time
90% or more when, complete cutting-in control process.
6. a kind of wind power plant Energy Management System with power grid access control function according to claim 1, feature
It is, the wind power plant active power output control unit includes the following steps：
B1, receive active power output regulation and control instruction, if active power output regulation and control instruction comes from grid dispatching center, set judgement symbol flag
It is 0, if active power output regulation and control instruction comes from existing stratum, it is 1 to set judgement symbol flag；
B2, the active maximum rate of change λ according to setting are calculated the real-time active power output P of wind power plant per minute by formula (1)：
P=Ppre+λ×Pmax (1)
In formula, PpreFor the real-time active power output of wind power plant of previous minute, PmaxFor the maximum active power output of wind power plant, work as wind power plant
Installed capacity Pins<When 30MW, λ Prmax≤ 6MW/min, as 30MW≤PinsWhen≤150MW, λ Prmax≤Pins/ 5, work as Pins>
When 150MW, λ Prmax≤30MW/min；
B3, work as flag=0, enter step d, work as flag=1, verified by formula (2) real-time output active to wind power plant：
P≤0.9Pava (2)
In formula, PavaMaximum active power output can be used to enter step B4 if meeting formula (2) for wind power plant, otherwise, exit control；
B4, the real-time active power output of obtained wind power plant is assigned to every Wind turbines by Wind turbines capacity ratio, is had
Work(regulates and controls, and completes a wind power plant active power output control；
B5, the real-time active power output of wind power plant after regulation and control is sampled, if meeting the requirement of active power output regulation and control instruction, is exited
Control, waits for next regulation and control instruction, otherwise, returns to step b.
7. a kind of wind power plant Energy Management System with power grid access control function according to claim 1, feature
It is, the idle output control unit of wind power plant includes the following steps：
C1, the setting idle power generating value of wind power plant；
C2, idle power generating value is assigned to every Wind turbines by Wind turbines capacity ratio, carries out idle regulation and control.
8. a kind of wind power plant Energy Management System with power grid access control function according to claim 1, feature
It is, the windfarm system frequency regulation unit includes the following steps：
D1, judge whether real-time grid frequency f meets the pass frequency requirement of operation of power networks：49.5Hz<f<50.2Hz, if full
Foot, enters step D5, if not satisfied, entering step D2；
D2, the active maximum rate of change λ according to setting, calculate the real-time active power output of wind power plant per minute, if 47Hz<f<
49.5Hz increases wind power plant active power output to P by formula (1)：
P=Ppre+λ×Pmax (1)
In formula, PpreFor the real-time active power output of wind power plant of previous minute, PmaxFor the maximum active power output of wind power plant, work as wind power plant
Installed capacity Pins<When 30MW, λ Prmax≤ 6MW/min, as 30MW≤PinsWhen≤150MW, λ Prmax≤Pins/ 5, work as Pins>
When 150MW, λ Prmax≤ 30MW/min, if 50.2Hz<f<51Hz reduces wind power plant active power output to P by formula (3)：
If f<47Hz or f>51Hz, wind power plant 40% real-time active power output of reduction per minute；
D3, judge whether wind power plant active power output P meets wind power plant service requirement, if P>PmaxOr P<Pmin, then wind power plant is active
Output P is modified to：
In formula, PminFor wind power plant minimum active power output；
D4, the real-time active power output of obtained wind power plant is assigned to every Wind turbines by Wind turbines capacity ratio, is had
Work(regulates and controls, and completes a windfarm system frequency adjusting control；
D5, control delay is set, the lower secondary control of Time-delayed trigger is controlled by judgement, returns to step D1.
9. a kind of wind power plant Energy Management System with power grid access control function according to claim 1, feature
It is, the wind-powered electricity generation field voltage regulation unit includes the following steps：
E1, the quasi- voltage reference value V of biddingrefFor 1.0p.u., wind power plant access point real-time voltage V is read, if meeting 0.9Vref≤V
≤1.1VrefCondition, wind power plant still press current idle output operation, if Reactive-power control mark without voltage & var control
NCount=0 enters step E2 if being unsatisfactory for above-mentioned condition；
E2, work as nCount=0, enter step E5, otherwise enter step E3；
E3, voltage change Δ V is calculated by formula (5)：
Δ V=Vk+1-Vk (5)
In formula, Vk+1For the real-time voltage value after+1 idle regulation and control of kth, VkFor the real-time voltage value after the idle regulation and control of kth time；
E4, the system voltage variation tendency after idle adjustment is judged, if Δ V/Vk>0.1, correct the idle classification adjustment amount of wind power plant
ΔQstepFor 0.9 Δ Qstep, E5 is entered step, otherwise, works as V>VrefAnd Δ V>When 0, Δ Q is correctedstepFor 1.2~1.4 Δs
Qstep, work as V<VrefAnd Δ V<When 0, Δ Q is correctedstepFor 1.2~1.4 Δ Qstep, in addition to above-mentioned three kinds of situations, Δ QstepIt maintains
Initial value is constant；
E5, the reactive power that adjustment wind power plant is classified according to formula (6) are contributed：
Q '=Q+ Δs Qstep (6)
In formula, Q ' is the idle output of wind power plant after adjustment, and Q is the idle output of current wind power plant, Δ QstepFor idle point of wind power plant
Grade adjustment amount, is chosen as the 10%~50% of wind power plant reactive capability；
E6, judge whether the idle output Q ' of wind power plant after adjustment meets wind power plant service requirement, if Q '>QmaxOr Q '<Qmin, then
Wind power plant is idle, and output Q is modified to：
In formula, QmaxAnd QminThe respectively idle output maximum value of wind power plant and minimum value；
E7, obtained wind power plant reactive power is contributed is assigned to every Wind turbines by Wind turbines capacity ratio, carries out nothing
Work(regulates and controls, nCount+1, completes First air voltage of electric field adjusting control；
E8, control delay is set, the lower secondary control of Time-delayed trigger is controlled by judgement, returns to step E1.
10. a kind of wind power plant Energy Management System with power grid access control function according to claim 1, feature
It is, it is positioned at station level computer monitoring system to have wind energy turbine set operator training system, the system in the station level
Software architecture, be responsible for carrying out analogue simulation to the operating status of wind power plant.
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| CN112799363A (en) * | 2020-12-30 | 2021-05-14 | 广州发展能源站管理有限公司 | Intelligent electrical monitoring management system for layered and partitioned energy station |
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