CN110350574A - A kind of urgent Poewr control method and system of the offshore wind farm through soft straight access system - Google Patents
A kind of urgent Poewr control method and system of the offshore wind farm through soft straight access system Download PDFInfo
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- CN110350574A CN110350574A CN201910467290.3A CN201910467290A CN110350574A CN 110350574 A CN110350574 A CN 110350574A CN 201910467290 A CN201910467290 A CN 201910467290A CN 110350574 A CN110350574 A CN 110350574A
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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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- 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
Urgent Poewr control method and system the present invention provides a kind of offshore wind farm through soft straight access system, comprising: based on the communication system pre-established, receive the control signal that system call center is sent；According to the type of control signal, start corresponding urgent Poewr control method；Wherein, urgent Poewr control method may act on land braking resistor and/or marine wind electric field AC system；Land braking resistor is set to land converter station direct current exit.The present invention using flexible direct current active power can quick separately adjustable feature, design and have urgent Poewr control method, can effectively adjust the power of injection major network system, improve the flexibility to offshore wind farm control.
Description
Technical field
The invention belongs to flexible HVDC transmission system control technology fields, and in particular to a kind of offshore wind farm directly enters through soft
The urgent Poewr control method and system of system.
Background technique
Relative to land wind-powered electricity generation, offshore wind farm resource is richer, is influenced by geographical nature environment smaller, and wind energy duration is more
It is good, therefore offshore wind farm has become one of the main trend of green sustainable energy development, has entered the engineering stage at present.
In the prior art by flexible DC transmission (HVDC) system by the electric energy that offshore wind farm generates be transmitted to major network at
For main means, but wind-power electricity generation has the characteristics that fluctuation, intermittence and randomness, proposes very high want to control system
It asks.When wind-power electricity generation power is lower, can be powered by dispatching other generating sets of major network.When wind-power electricity generation power is higher
When, extra power need to be subjected to dissipation processing, otherwise be easy to cause DC over-voltage under major network fault condition or to major network
The afterflow of ground fault, if only relying upon the drop power control of blower itself, the response time is longer, is unable to satisfy and drops power in short-term
Demand.Corresponding function is realized at this point, being typically chosen and being equipped with braking resistor.
Under normal circumstances, braking resistor can automatically engage realization by the offset of detection reflection unbalanced power amount
Power dissipation.But when significant trouble or other emergencies occurring inside major network, it is desirable that the power of offshore wind farm injection is in milli
Second grade time scale falls to and runs under zero or a certain power level, and the input power of wind power plant is in the time ruler of hundred Milliseconds
It is considered constant on degree, it is current to lack corresponding urgent power control strategy and method, it can not achieve fast power adjusting.
Summary of the invention
To overcome the above-mentioned prior art to be directed to the offshore wind farm system through flexible HVDC transmission system access major network, in major network
In the case of there are significant trouble or other dispatching requirements, the power of injection major network cannot be able to carry out precisely, quickly and efficiently
The deficiency of control, the present invention propose a kind of urgent Poewr control method and system of the offshore wind farm through soft straight access system, in conjunction with
The power dissipation capabilities of land converter station direct current exit braking resistor are, it can be achieved that carry out essence to the active power of injection major network
Standard is quickly and efficiently adjusted, and improves the flexibility adjusted to wind-powered electricity generation.
Realize solution used by above-mentioned purpose are as follows:
A kind of urgent Poewr control method of the offshore wind farm through soft straight access system, it is improved in that including:
Based on the communication system pre-established, the control signal that system call center is sent is received；
According to the type of the control signal, start corresponding urgent Poewr control method；
Wherein, the urgent Poewr control method may act on land braking resistor and/or marine wind electric field exchange system
System；The land braking resistor is set to land converter station direct current exit.
First optimal technical scheme provided by the invention, it is improved in that the class according to the control signal
Type, starting corresponding urgent Poewr control method includes:
The type of the control signal includes: the first control signal set when ground fault occurs based on major network, is based on
It injects the second control signal set when the active power of major network it is required that reducing wind-powered electricity generation and injects major network based on wind-powered electricity generation is restored
The third control signal set when active power；
When the control signal is first control signal, by controlling land braking resistor startup power dissipation work
Can, realize that injection major network active power is reduced to rapidly 0；
When the control signal is second control signal, start long-term drop power functions, by starting marine wind electric field
Control system own power dissipation function or offshore wind farm station control system itself cooperate land braking resistor mutual power consumption
Function is dissipated, realizes the lasting active power for reducing injection major network；
When the control signal is that third controls signal, inhibit long-term drop power functions, by inhibiting marine wind electric field
Control system own power dissipation function or offshore wind farm station control system itself and land braking resistor power dissipation function,
Realize the active power for restoring injection major network.
Second optimal technical scheme provided by the invention, it is improved in that described by controlling land braking resistor
Device startup power dissipation function realizes that injection major network active power is reduced to rapidly 0, comprising:
Land system is controlled within the Millisecond time by the inner loop control device parameter of the land change of current station control system of zero setting
The active power of dynamic resistor consumption direct current system transmission, is reduced to 0 for the active power for injecting major network.
Third optimal technical scheme provided by the invention, it is improved in that the active power that major network will be injected
After being reduced to 0, further includes:
After continuing preset duration, the active power for restoring injection major network is horizontal to offshore wind farm unit generation.
4th optimal technical scheme provided by the invention, it is improved in that the wattful power for restoring injection major network
Rate is horizontal to offshore wind farm unit generation, comprising:
By regulating resistor input quantity, power resume speed as required restores the active power of injection major network
It is horizontal to offshore wind farm unit generation.
5th optimal technical scheme provided by the invention, it is improved in that the long-term drop power functions of the starting, lead to
It crosses starting offshore wind farm station control system own power dissipation function or offshore wind farm station control system itself cooperates land braking
Resistor mutual power dissipation function realizes the lasting active power for reducing injection major network, comprising:
When nonemergency, the second control signal is transferred to marine wind electric field AC system, makes offshore wind farm
Station control system starts own power dissipation function, reduces the active power of injection major network and continues；
When emergency, the second control signal is transferred to marine wind electric field AC system, makes marine wind electric field
Control system starts own power dissipation function, reduces the active power of injection major network, while by starting land braking resistor
The power for injecting major network is reduced rapidly to the level of setting and continued by device power dissipation function；
Wherein, the quantity of the resistor of power adjustment investment drops according to blower in the land braking resistor.
6th optimal technical scheme provided by the invention, it is improved in that the long-term drop power functions of the inhibition, lead to
Cross inhibition offshore wind farm station control system own power dissipation function or offshore wind farm station control system itself and land braking electricity
Device power dissipation function is hindered, realizes the active power for restoring injection major network, comprising:
When only offshore wind farm station control system own power dissipation function starts, by third control signal transmitting
To marine wind electric field AC system, offshore wind farm station control system is made to stop own power dissipation function, restores injection major network
Active power is horizontal to offshore wind farm unit generation；
It, will be described when offshore wind farm station control system itself and land braking resistor power dissipation function start simultaneously
Third control signal is transferred to marine wind electric field AC system, and offshore wind farm station control system is made to stop own power dissipation work
Can, while signal is controlled according to the third and stops the land braking resistor operation, restore the active power of injection major network
It is horizontal to offshore wind farm unit generation.
A kind of urgent power control system of the offshore wind farm through soft straight access system, it is improved in that including: signal
Module and control module；
The signaling module, for receiving the control letter that system call center is sent based on the communication system pre-established
Number；
The control module starts corresponding urgent Poewr control method for the type according to the control signal；
Wherein, the urgent Poewr control method may act on land braking resistor and/or marine wind electric field exchange system
System；The land braking resistor is set to land converter station direct current exit.
7th optimal technical scheme provided by the invention, it is improved in that the control module includes the first control
Unit, the second control unit and third control unit；
The type of the control signal includes: the first control signal set when ground fault occurs based on major network, is based on
It injects the second control signal set when the active power of major network it is required that reducing wind-powered electricity generation and injects major network based on wind-powered electricity generation is restored
The third control signal set when active power；
The first control unit, for passing through the land braking of control when the control signal is first control signal
Resistor startup power dissipation function realizes that injection major network active power is reduced to rapidly 0；
Second control unit, for when the control signal is second control signal, starting long-term drop power function
Can, cooperated by starting offshore wind farm station control system own power dissipation function or offshore wind farm station control system itself land
Braking resistor mutual power dissipation function realizes the lasting active power for reducing injection major network；
The third control unit, for inhibiting long-term drop power function when the control signal is that third controls signal
Can, by inhibiting offshore wind farm station control system own power dissipation function or offshore wind farm station control system itself and land system
Dynamic resistor power dissipation function, realizes the active power for restoring injection major network.
8th optimal technical scheme provided by the invention, it is improved in that second control unit includes urgent
Control subelement and non-emergent control subelement；
The emergent control subelement, for when nonemergency, the second control signal to be transferred to sea turn
Electric field AC system makes offshore wind farm station control system start own power dissipation function, reduces the active power of injection major network
And continue；
The non-emergent control subelement, for when emergency, the second control signal to be transferred to sea turn
Electric field AC system makes offshore wind farm station control system start own power dissipation function, reduces the active power of injection major network,
The power for injecting major network is reduced rapidly to the level of setting simultaneously by starting land braking resistor power dissipation function simultaneously
Continue；
Wherein, the quantity of the resistor of power adjustment investment drops according to blower in the land braking resistor.
Compared with the immediate prior art, the device have the advantages that as follows:
The urgent Poewr control method and system that the present invention provides a kind of suitable for offshore wind farm through soft straight access system,
Based on the communication system pre-established, the control signal that system call center is sent is received；According to the type of control signal, starting
Corresponding urgent Poewr control method；Wherein, urgent Poewr control method may act on land braking resistor and/or sea turn
Electric field AC system；Land braking resistor is set to land converter station direct current exit.The present invention is active using flexible direct current
Power can quick separately adjustable feature, design and have urgent Poewr control method, can effectively adjust injection major network system
Power improves the flexibility to offshore wind farm control.
It specifically includes:
1. EPC1 function can be started when ground fault occurs for major network, so that the power of injection major network is reduced to rapidly zero, reduce
The fault current of grounding point feed-in avoids DC voltage by excessively high lifting；It is failure by maintaining zero power phase in short-term
The recovery of point provides buffer time；It is gradually finally restored to current Wind turbines power generation level, to ensure the reliable clear of failure
Except the stable recovery with system.
2. working as major network control centre equilibrium region network load, it is desirable that when reducing the power of wind-powered electricity generation injection major network, can pass through
Start EPC2 function, so that the power of injection major network is reduced to certain level, improves the flexibility of power regulation.
3. working as major network control centre equilibrium region network load, it is desirable that when improving the power of wind-powered electricity generation injection major network, can pass through
Start EPC3 signal, make EPC2 disabler, so that the power for restoring wind-powered electricity generation injection major network can have in time to current power generation level
Effect ground provides power support.
Detailed description of the invention
Fig. 1 is that a kind of offshore wind farm provided by the invention is illustrated through the urgent Poewr control method process of soft straight access system
Figure；
Fig. 2 is urgent control function of power schematic diagram provided by the invention；
Fig. 3 is urgent power control EPC1 function control strategy schematic diagram provided by the invention；
Fig. 4 is urgent Poewr control method general frame schematic diagram provided by the invention；
Fig. 5 is the power transmission situation schematic diagram in the embodiment of the present invention, after starting EPC1 function；
Fig. 6 is in the embodiment of the present invention, and after starting EPC2 function, the power that power is down to 25% under nonemergency is passed
Defeated situation schematic diagram；
Fig. 7 a be the embodiment of the present invention in, start EPC2 function after, in case of emergency power be down to 25% EPC2 and
The signal waveform of braking resistor and the power schematic diagram of land braking resistor consumption；
Fig. 7 b is in the embodiment of the present invention, and after starting EPC2 function, in case of emergency power is down to 25% soft direct line
The power and blower of system injection major network inject the power schematic diagram of soft lineal system；
Fig. 7 c is in the embodiment of the present invention, and after starting EPC2 function, in case of emergency power is down to 25% land side
With the DC voltage schematic diagram of marine side；
Fig. 8 be the embodiment of the present invention in, start EPC3 function after, signal and power transmission situation schematic diagram；
Fig. 9 is a kind of urgent power control system basic structure of the offshore wind farm through soft straight access system provided by the invention
Schematic diagram；
Figure 10 is that a kind of offshore wind farm provided by the invention is tied in detail through the urgent power control system of soft straight access system
Structure schematic diagram.
Specific embodiment
A specific embodiment of the invention is described in further detail with reference to the accompanying drawing.
Embodiment 1:
A kind of urgent Poewr control method flow diagram of the offshore wind farm provided by the invention through soft straight access system is such as
Shown in Fig. 1, comprising:
Step 1: based on the communication system pre-established, receiving the control signal that system call center is sent；
Step 2: according to the type of control signal, starting corresponding urgent Poewr control method；
Wherein, urgent Poewr control method may act on land braking resistor and/or marine wind electric field AC system；Land
Upper braking resistor is set to land converter station direct current exit.
Specifically, a kind of urgent Poewr control method of the offshore wind farm provided by the invention through soft straight access system, according to
Real system demand for control devises three kinds of urgent control function of power and its implementation, as shown in Figure 2.Different from braking
Resistor realizes power dissipation (situation usually little in non-emergent, power deviation by monitoring unbalanced power amount automatically
Lower starting), the control method by design special control strategy realize in short-term, high-power, the adjustable urgent power control of speed
System, is the supplement to automated power dissipation function, only issues control letter to land flexible direct current converter station at system call center
Just start after number, this requires system major networks and flexible direct current converter station to establish good communication system, according to different signals
Type, urgent Poewr control method will realize 3 kinds of functions in Fig. 2.
First, when land change of current station control system receives EPC1 (urgent power control, emergency power
Control it) after signal, that is, first control signal, is executed according to Fig. 3 control strategy, wherein PDCFor the active of direct current system transmission
Power, PrFor the active power that braking resistor dissipates, PinFor the active power for injecting major network, F is to apply to braking resistor
Power dissipation signal, Δ P are that active power replys speed, and t indicates the time.Specific step is as follows:
Step 101-1: closure switch S2 and switch S1 is closed to contact a, makes braking resistor in t1It is dissipated in time
The active power of direct current system transmission guarantees that the active power of injection major network is rapidly decreased to be zero at this time, changes by the way that zero setting is land
The inner loop control device parameter of station control system is flowed, it can be achieved that being reduced to zero, i.e. t for high-power within the Millisecond time1For Millisecond
Time.
Step 101-2: if zero power phase in short-term need to be maintained, current state is kept to continue t2Time.
Step 101-3: change switch S1 state to contact b, braking resistor input quantity is adjusted, so that injecting major network
Active power restores horizontal to current offshore wind farm unit generation according to the slope of Δ P, and Δ P can be adjusted according to actual needs.Example
Such as, time t is passed through in Fig. 23, the active power for injecting major network restores horizontal to current offshore wind farm unit generation.
Step 101-4: disconnecting switch S1 and S2, completes EPC1 function.
Second, after land change of current station control system receives EPC2 signal i.e. second control signal, as shown in figure 4, opening
Dynamic long-term drop power functions.Under nonemergency, which is transferred to marine wind electric field AC system, forces marine wind electric field
Control system starts own power dissipation function, reduces the power of injection major network at relatively slow speeds.
In case of emergency, which will act on land braking resistor and marine wind electric field AC system simultaneously.One
The power for injecting major network, the level of requirement is reduced rapidly to by the land braking resistor of starting by aspect, and another party forces sea
Upper wind power station control system starts own power dissipation function, reduces wind turbine power generation power at relatively slow speeds.Due to wind
The speed that power drops in machine is less than the speed of land braking resistor dissipated power, and therefore, land braking resistor need to be according to blower
The quantity of the resistor of the case where dropping power adjustment investment, the power to guarantee injection major network is constant, until wind turbine power generation power
It is down to the level of requirement.
Third inhibits long-term drop function after land change of current station control system receives EPC3 signal i.e. third control signal
Rate function, as shown in Figure 4.The signal will force offshore wind farm station control system to stop drop power, if land braking resistor
Investment, the signal also make it exit work, and the active power for injecting major network is made to restore horizontal to offshore wind farm unit generation.
For above 3 kinds of urgent control function of power, design preferences rank are as follows: EPC1 > EPC3 > EPC2.
In addition, the realization of EPC1 function depends on the design of braking resistor, the thermal capacity of braking resistor should meet most
Requirement under serious operating condition, while requiring the transient process for having cooling adjusting after exiting.
Wherein, EPC1 signal is based on setting when major network generation ground fault, and EPC2 signal is based on requiring to reduce wind-powered electricity generation injection
It sets when the active power of major network, is set when EPC3 signal is based on the active power for restoring wind-powered electricity generation injection major network.
Fig. 5 is the power transmission situation schematic diagram started after EPC1 function, active power and braking including injecting major network
The power situation consumed on resistor fully achieves corresponding function, and wherein P, Q are respectively the active power and nothing for injecting major network
Function power, BR_Power refer to the power of land braking resistor consumption.
Fig. 6 is after starting EPC2 function, and power is down to 25% power transmission situation schematic diagram under nonemergency, i.e.,
Only when starting offshore wind turbine drop power functions, it is desirable that the power level for injecting major network is down to 25%, fully achieves corresponding function.
Fig. 7 a- Fig. 7 c is after starting EPC2 function, and in case of emergency, in case of emergency power is down to 25% signal
And power transmission situation schematic diagram, i.e., when starting offshore wind turbine drop power functions and land braking resistor simultaneously, it is desirable that injection
The power level of major network is down to 25%, fully achieves corresponding function.Wherein, Fig. 7 a gives the letter of EPC2 and braking resistor
Number waveform and the power of land braking resistor consumption.Fig. 7 b gives power and the blower injection of soft lineal system injection major network
The power schematic diagram of soft lineal system, wherein P_gap and Q_gap is respectively the active power of soft lineal system injection major network and idle
Power, P_pcc and Q_pcc are respectively the active power and reactive power that blower injects soft lineal system.Fig. 7 c gives land side
With the DC voltage schematic diagram of marine side.
After Fig. 8 is starting EPC3 function, make current EPC2 disabler, by blower inject marine converter station power and
Decline is simultaneously stopped by the power of land converter station injection major network, and is gradually recovered after a period of time, due to time shaft compared with
Long, power recovered part does not embody here.Wherein, P is the active power of soft lineal system injection major network, and P_pcc is blower note
Enter the active power of soft lineal system.
Embodiment 2:
Based on the same inventive concept, the urgent power control the present invention also provides a kind of offshore wind farm through soft straight access system
System processed solves the principle of technical problem and the urgent Poewr control method of the soft straight access system of offshore wind farm due to these equipment
Similar, overlaps will not be repeated.
The system basic structure is as shown in Figure 9, comprising: signaling module and control module；
Wherein, signaling module, for receiving the control letter that system call center is sent based on the communication system pre-established
Number；
Control module starts corresponding urgent Poewr control method for the type according to control signal；
Wherein, urgent Poewr control method may act on land braking resistor and/or marine wind electric field AC system；Land
Upper braking resistor is set to land converter station direct current exit.
The urgent power control system detailed construction of the soft straight access system of offshore wind farm is as shown in Figure 10.
Wherein, control module includes first control unit, the second control unit and third control unit；
The type of control signal includes: the first control signal set when ground fault occurs based on major network, based on requirement
Wind-powered electricity generation is reduced to inject the second control signal set when the active power of major network and inject the active of major network based on wind-powered electricity generation is restored
The third control signal set when power；
First control unit, for being opened by controlling land braking resistor when controlling signal is first control signal
Dynamic power dissipation function realizes that injection major network active power is reduced to rapidly 0；
Second control unit, for when controlling signal is second control signal, starting long-term drop power functions, by opening
Dynamic offshore wind farm station control system own power dissipation function or offshore wind farm station control system itself cooperate land braking resistor
Device mutual power dissipation function realizes the lasting active power for reducing injection major network；
Third control unit, for inhibiting long-term drop power functions, passing through suppression when controlling signal is that third controls signal
Offshore wind farm station control system own power dissipation function processed or offshore wind farm station control system itself and land braking resistor
Power dissipation function realizes the active power for restoring injection major network.
Wherein, first control unit passes through the inner loop control device parameter of the land change of current station control system of zero setting, in Millisecond
In time, the active power of land braking resistor consumption direct current system transmission is controlled, the active power for injecting major network is reduced to
0。
Wherein, first control unit includes the first recovery subelement, after continuing preset duration, restores injection major network
Active power is horizontal to offshore wind farm unit generation.
Wherein, first restores subelement by regulating resistor input quantity, and power resume speed as required is restored
The active power for injecting major network is horizontal to offshore wind farm unit generation.
Wherein, the second control unit includes emergent control subelement and non-emergent control subelement；
Emergent control subelement, for when nonemergency, second control signal to be transferred to marine wind electric field exchange
System makes offshore wind farm station control system start own power dissipation function, reduces the active power of injection major network and continues；
Non-emergent control subelement, for when emergency, second control signal to be transferred to marine wind electric field exchange
System makes offshore wind farm station control system start own power dissipation function, reduces the active power of injection major network, passes through simultaneously
Start land braking resistor power dissipation function the power for injecting major network is reduced rapidly to the level of setting and is continued；
Wherein, the quantity of the resistor of power adjustment investment drops according to blower in land braking resistor.
Wherein, third control unit includes individually controlling subelement and double control subelement；
Individually control subelement is used for when only offshore wind farm station control system own power dissipation function starts, will
Third control signal is transferred to marine wind electric field AC system, and offshore wind farm station control system is made to stop own power dissipation work
Can, the active power for restoring injection major network is horizontal to offshore wind farm unit generation；
Double control subelement, for when offshore wind farm station control system itself and land braking resistor power dissipation function
When can start simultaneously, third control signal is transferred to marine wind electric field AC system, stops offshore wind farm station control system
Own power dissipation function, while signal is controlled according to third and stops land braking resistor operation, restore having for injection major network
Function power is horizontal to offshore wind farm unit generation.
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.
Finally it should be noted that: above embodiments are merely to illustrate the technical solution of the application rather than to its protection scopes
Limitation, although the application is described in detail referring to above-described embodiment, those of ordinary skill in the art should
Understand: those skilled in the art read the specific embodiment of application can still be carried out after the application various changes, modification or
Person's equivalent replacement, but these changes, modification or equivalent replacement, are applying within pending claims.
Claims (10)
1. a kind of urgent Poewr control method of offshore wind farm through soft straight access system characterized by comprising
Based on the communication system pre-established, the control signal that system call center is sent is received；
According to the type of the control signal, start corresponding urgent Poewr control method；
Wherein, the urgent Poewr control method may act on land braking resistor and/or marine wind electric field AC system；Institute
It states land braking resistor and is set to land converter station direct current exit.
2. the method as described in claim 1, which is characterized in that the type according to the control signal starts corresponding
Promptly Poewr control method includes:
The type of the control signal includes: the first control signal set when ground fault occurs based on major network, based on requirement
Wind-powered electricity generation is reduced to inject the second control signal set when the active power of major network and inject the active of major network based on wind-powered electricity generation is restored
The third control signal set when power；
It is real by controlling land braking resistor startup power dissipation function when the control signal is first control signal
Now injection major network active power is reduced to rapidly 0；
When the control signal is second control signal, start long-term drop power functions, passes through starting marine wind electric field control
System own power dissipation function or offshore wind farm station control system itself cooperate land braking resistor mutual power dissipation work
Can, realize the lasting active power for reducing injection major network；
When the control signal is that third controls signal, inhibit long-term drop power functions, by inhibiting marine wind electric field control
System own power dissipation function or offshore wind farm station control system itself and land braking resistor power dissipation function are realized
Restore the active power of injection major network.
3. method according to claim 2, which is characterized in that described to be dissipated by controlling land braking resistor startup power
Function realizes that injection major network active power is reduced to rapidly 0, comprising:
By the inner loop control device parameter of the land change of current station control system of zero setting, within the Millisecond time, land braking electricity is controlled
The active power for hindering device consumption direct current system transmission, is reduced to 0 for the active power for injecting major network.
4. method as claimed in claim 3, which is characterized in that it is described the active power for injecting major network is reduced to 0 after, also wrap
It includes:
After continuing preset duration, the active power for restoring injection major network is horizontal to offshore wind farm unit generation.
5. method as claimed in claim 4, which is characterized in that the active power for restoring injection major network to sea turn motor
Group power generation level, comprising:
By regulating resistor input quantity, power resume speed as required restores the active power of injection major network to sea
Upper Wind turbines power generation level.
6. method according to claim 2, which is characterized in that the long-term drop power functions of starting, by starting sea turn
Electrical field control system own power dissipation function or offshore wind farm station control system itself cooperate the land common function of braking resistor
Rate dissipation function realizes the lasting active power for reducing injection major network, comprising:
When nonemergency, the second control signal is transferred to marine wind electric field AC system, makes marine wind electric field control
System processed starts own power dissipation function, reduces the active power of injection major network and continues；
When emergency, the second control signal is transferred to marine wind electric field AC system, makes marine wind electric field control
System starts own power dissipation function, reduces the active power of injection major network, while by starting land braking resistor function
The power for injecting major network is reduced rapidly to the level of setting and continued by rate dissipation function；
Wherein, the quantity of the resistor of power adjustment investment drops according to blower in the land braking resistor.
7. method according to claim 2, which is characterized in that the long-term drop power functions of inhibition, by inhibiting sea turn
Electrical field control system own power dissipation function or offshore wind farm station control system itself and land braking resistor power dissipation
Function realizes the active power for restoring injection major network, comprising:
When only offshore wind farm station control system own power dissipation function starts, third control signal is transferred to sea
Upper wind power plant AC system makes offshore wind farm station control system stop own power dissipation function, restores the active of injection major network
Power is horizontal to offshore wind farm unit generation；
When offshore wind farm station control system itself and land braking resistor power dissipation function start simultaneously, by the third
Control signal is transferred to marine wind electric field AC system, so that offshore wind farm station control system is stopped own power dissipation function, together
When signal controlled according to the third stop the land braking resistor and run, restore the active power of injection major network to sea
Wind turbines power generation level.
8. a kind of urgent power control system of offshore wind farm through soft straight access system characterized by comprising signaling module and
Control module；
The signaling module, for receiving the control signal that system call center is sent based on the communication system pre-established；
The control module starts corresponding urgent Poewr control method for the type according to the control signal；
Wherein, the urgent Poewr control method may act on land braking resistor and/or marine wind electric field AC system；Institute
It states land braking resistor and is set to land converter station direct current exit.
9. system as claimed in claim 8, which is characterized in that the control module includes first control unit, the second control
Unit and third control unit；
The type of the control signal includes: the first control signal set when ground fault occurs based on major network, based on requirement
Wind-powered electricity generation is reduced to inject the second control signal set when the active power of major network and inject the active of major network based on wind-powered electricity generation is restored
The third control signal set when power；
The first control unit, for passing through the land braking resistor of control when the control signal is first control signal
Device startup power dissipation function realizes that injection major network active power is reduced to rapidly 0；
Second control unit is led to for when the control signal is second control signal, starting long-term drop power functions
It crosses starting offshore wind farm station control system own power dissipation function or offshore wind farm station control system itself cooperates land braking
Resistor mutual power dissipation function realizes the lasting active power for reducing injection major network；
The third control unit, for inhibiting long-term drop power functions, leading to when the control signal is that third controls signal
Cross inhibition offshore wind farm station control system own power dissipation function or offshore wind farm station control system itself and land braking electricity
Device power dissipation function is hindered, realizes the active power for restoring injection major network.
10. system as claimed in claim 9, which is characterized in that second control unit include emergent control subelement and
Non-emergent control subelement；
The emergent control subelement, for when nonemergency, the second control signal to be transferred to marine wind electric field
AC system makes offshore wind farm station control system start own power dissipation function, reduces the active power of injection major network and holds
It is continuous；
The non-emergent control subelement, for when emergency, the second control signal to be transferred to marine wind electric field
AC system makes offshore wind farm station control system start own power dissipation function, reduces the active power of injection major network, simultaneously
The power for injecting major network is reduced rapidly to the level of setting by the land braking resistor power dissipation function of starting and is continued；
Wherein, the quantity of the resistor of power adjustment investment drops according to blower in the land braking resistor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910467290.3A CN110350574A (en) | 2019-05-31 | 2019-05-31 | A kind of urgent Poewr control method and system of the offshore wind farm through soft straight access system |
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| CN201910467290.3A CN110350574A (en) | 2019-05-31 | 2019-05-31 | A kind of urgent Poewr control method and system of the offshore wind farm through soft straight access system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110932304A (en) * | 2019-11-08 | 2020-03-27 | 南京南瑞继保工程技术有限公司 | Control system and control method for direct current energy consumption device |
| CN112736956A (en) * | 2020-12-08 | 2021-04-30 | 南京南瑞继保工程技术有限公司 | Remote control implementation method and system for offshore wind power flexible-straight integrated monitoring platform |
| CN113452011A (en) * | 2020-03-25 | 2021-09-28 | 许继电气股份有限公司 | Double-connection transformer offshore wind power direct current sending-out system and control method |
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2019
- 2019-05-31 CN CN201910467290.3A patent/CN110350574A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110932304A (en) * | 2019-11-08 | 2020-03-27 | 南京南瑞继保工程技术有限公司 | Control system and control method for direct current energy consumption device |
| CN110932304B (en) * | 2019-11-08 | 2021-10-01 | 南京南瑞继保工程技术有限公司 | Control system and control method for direct current energy consumption device |
| JP2022545136A (en) * | 2019-11-08 | 2022-10-25 | エヌアール エンジニアリング カンパニー リミテッド | Control system and control method for DC energy consuming device |
| JP7291857B2 (en) | 2019-11-08 | 2023-06-15 | エヌアール エンジニアリング カンパニー リミテッド | Control system and control method for DC energy consuming device |
| CN113452011A (en) * | 2020-03-25 | 2021-09-28 | 许继电气股份有限公司 | Double-connection transformer offshore wind power direct current sending-out system and control method |
| WO2021189754A1 (en) * | 2020-03-25 | 2021-09-30 | 许继电气股份有限公司 | Offshore wind power dc transmission system employing two connected transformers, and control method therefor |
| CN113452011B (en) * | 2020-03-25 | 2022-12-02 | 许继电气股份有限公司 | Double-connection transformer offshore wind power direct current sending-out system and control method |
| CN112736956A (en) * | 2020-12-08 | 2021-04-30 | 南京南瑞继保工程技术有限公司 | Remote control implementation method and system for offshore wind power flexible-straight integrated monitoring platform |
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