CN110350555A - Distributed urgent need response control mehtod and system - Google Patents
Distributed urgent need response control mehtod and system Download PDFInfo
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- CN110350555A CN110350555A CN201910635854.XA CN201910635854A CN110350555A CN 110350555 A CN110350555 A CN 110350555A CN 201910635854 A CN201910635854 A CN 201910635854A CN 110350555 A CN110350555 A CN 110350555A
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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
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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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
- H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
Abstract
The invention discloses a kind of distributed urgent need response control mehtod and systems, wherein method obtains high-order low-pass filter parameter and control parameter the following steps are included: according to history noisy data and power grid typical operation modes progress off-line setting calculation；High-order low-pass filter parameter and control parameter are sent to each distributed AC servo system substation by lower-cost slow communication route, local bus frequency change rate is filtered and be continued to monitor according to high-order low-pass filter parameter and control parameter；If filtered frequency change rate breaks starting threshold value by a fall, load is controlled according to control parameter.This method can be used for the control of power-system short-term frequency stabilization, effectively improve the speed of response, and greatly reduce load loss, and effectively improve the effect and economy of control, simple easily to realize.
Description
Technical field
The present invention relates to power system stability and control technical field, in particular to a kind of distributed urgent need response control
Method and system processed.
Background technique
Power-system short-term frequency stabilization problem is an important side of stabilization of power grids problem for a long time.In recent years,
Taking place frequently for direct current lockout state exacerbates the risk that high-capacity power vacancy occurs for receiving end power grid.As UHVDC Transmission Lines are defeated
The promotion of capacity and wind-powered electricity generation/photovoltaic unit access of low rotor inertia are sent, power grid equivalent moment of inertia constantly reduces, and occurs big
Mains frequency falls more rapidly after volumetric power vacancy, electric system primary frequency modulation and LOAD FREQUENCY respond be not enough to maintain be
Frequency minimum point of uniting is higher than low-frequency load shedding threshold value, be easy to cause low-frequency load shedding to act, loses a large amount of loads.
Urgent need response is a kind of short-term frequency stability control means of active, obtains customer charge by contracting in advance
Directly control power, a certain amount of load is actively cut off in power tense, to maintain the frequency stabilization of electric system.At present
Urgent need response technology generally uses centralized control mode.In this manner, it will lead to according to slow communication network
High latency influences control effect, will bring high construction cost according to high-speed communicating network.Therefore it needs to study more to pass through
It helps effective control mode.
Summary of the invention
The application is to be made based on inventor to the understanding of following problems and discovery:
Existing low-frequency load shedding technology needs to respond again after waiting mains frequency whereabouts a period of time, and excision frequency is not
It is enough timely, it results in the need for losing stabilization of more loads to maintain electric system, therefore use urgent need response technology master
It is dynamic first to cut off a part of load in time, load loss will be greatly reduced.Relative to system frequency, frequency change rate is one right
System power disturbs more sensitive signal, can effectively improve the speed of response, but the Spatial Difference of the signal is big, distance
Disturbance location is closer, and frequency change rate variation is more violent, and the signal for really being able to reflection total system power shortage is that system is used
Property centre frequency change rate, it is therefore desirable to research from local bus frequency change rate signal extraction system center of inertia frequency become
The method of rate component.
The present invention is directed to solve at least some of the technical problems in related technologies.
For this purpose, this method can an object of the present invention is to provide a kind of distributed urgent need response control mehtod
With the control for power-system short-term frequency stabilization, the speed of response is effectively improved, and greatly reduces load loss, and
The effect and economy of control are effectively improved, it is simple easily to realize.
It is another object of the present invention to propose a kind of distributed urgent need response control system.
In order to achieve the above objectives, one aspect of the present invention embodiment proposes a kind of distributed urgent need response control side
Method, comprising the following steps: off-line setting calculation is carried out according to history noisy data and power grid typical operation modes, obtains high-order lowpass filter
Wave device parameter and control parameter；The high-order low-pass filter parameter and control parameter are passed through into lower-cost slow communication line
Road is sent to each distributed AC servo system substation, with according to the high-order low-pass filter parameter and control parameter to local bus frequency
Change rate is filtered and continues to monitor；If filtered frequency change rate breaks starting threshold value by a fall, according to the control parameter
Control load.
The distributed urgent need response control mehtod of the embodiment of the present invention, can be used for power-system short-term frequency stabilization
Control, according to the size of filtered local bus frequency change rate as the foundation controlled, and frequency change rate is one
More sensitive signal is disturbed to system power, the speed of response can be effectively improved, and use urgent need response technology master
It is dynamic to cut off a part of load in time, to greatly reduce load loss, the effect and economy of control are effectively improved, it is simple easy
It realizes.
In addition, it is according to the above embodiment of the present invention distribution urgent need response control mehtod can also have it is following attached
The technical characteristic added:
Further, in one embodiment of the invention, off-line setting calculation including according to history noisy data is carried out, is obtained
High-order low-pass filter parameter.
Further, in one embodiment of the invention, the debugging principle of the high-order low-pass filter parameter are as follows:
Guarantee the filtered curve of frequency change rate and correspondence system inertia of diverse geographic location busbar voltage in history noisy data
Under the premise of the filtered curve of centre frequency change rate essentially coincides, cutoff frequency value is as big as possible.
Further, in one embodiment of the invention, off-line setting calculation including according to power grid typical operation modes is carried out,
Control parameter is obtained, specifically includes: according to the power grid typical operation modes, system single busbar simulation model is built, in unit
The lower emulation of power shortage disturbance measures system inertia centre frequency change rate curve, and obtains disturbance moment frequency change rate f 'T0；
The center of inertia frequency change rate curve is filtered according to the high-order low-pass filter parameter, curve is minimum after obtaining filtering
Point f 'min；System frequency, which is obtained, according to the single busbar model emulation falls to fTWhen corresponding power shortage Δ PT；To calculate
Control parameter out, wherein the control parameter includes adjusted coefficient KsetWith movement threshold value f 'T。
Further, in one embodiment of the invention, the adjusted coefficient KsetCalculation formula are as follows:
Kset=f 'T0/′min。
Further, in one embodiment of the invention, the movement threshold value f 'TCalculation formula are as follows:
f′T=Δ PT·f′min。
Further, in one embodiment of the invention, comprising: if filtered frequency change rate breaks the starting by a fall
Threshold value, then obtain the minimum value of the filtered frequency change rate, and judges whether the minimum value is more than movement threshold value；Such as
Fruit is more than the movement threshold value, then obtains and locally answer cutting load, and breaks the movement by a fall by the excision of direct load control device
The urgent need that the distributed AC servo system substation of threshold value is polymerize responds load.
Further, in one embodiment of the invention, the starting threshold value is chosen as -0.1Hz/s, or empirically
It chooses to prevent malfunction.
Further, in one embodiment of the invention, the calculation formula of the movement threshold value are as follows:
f′T=Δ PT·f′min,
Further, in one embodiment of the invention, the calculation formula of cutting load is answered in the local are as follows:
Wherein, Δ PRkCutting load amount, P are answered for k-th of distributed AC servo system substationRkIt can be cut for k-th of distributed AC servo system substation
The load upper limit, NRFor the sum of distributed AC servo system substation, f 'nadir_kThe local frequency change rate measured for the control sub-station is most
Small value.
Further, in one embodiment of the invention, join according to the high-order low-pass filter parameter and control
It is several the local bus frequency change rate is filtered and is continued to monitor before, further includes: according to current electric grid operating condition
The corresponding control parameter of immediate typical operation modes is selected to be initialized.
In order to achieve the above objectives, another aspect of the present invention embodiment proposes a kind of distributed urgent need response control system
System, comprising: off-line setting calculation module is obtained for carrying out off-line setting calculation according to history noisy data and power grid typical operation modes
High-order low-pass filter parameter and control parameter；Signal processing module is used for the high-order low-pass filter parameter and control
Parameter is sent to each distributed AC servo system substation, with according to the high-order low-pass filter parameter and control parameter to local bus frequency
Rate change rate is filtered and continues to monitor；Load control module, if breaking starting threshold value by a fall for filtered frequency change rate,
Load is then controlled according to the control parameter.
The distributed urgent need response control system of the embodiment of the present invention, can be used for power-system short-term frequency stabilization
Control, according to the size of filtered local bus frequency change rate as the foundation controlled, and frequency change rate is one
More sensitive signal is disturbed to system power, the speed of response can be effectively improved, and use urgent need response technology master
It is dynamic to cut off a part of load in time, to greatly reduce load loss, the effect and economy of control are effectively improved, it is simple easy
It realizes.
In addition, it is according to the above embodiment of the present invention distribution urgent need response control dress system can also have it is following
Additional technical characteristic:
Further, in one embodiment of the invention, the load control module is further used for obtaining the frequency
The minimum value of rate change rate, and judge whether the minimum value is more than movement threshold value, when being more than the movement threshold value, obtain this
Cutting load is answered on ground, and polymerize by the distributed AC servo system substation that the excision of direct load control device breaks the movement threshold value by a fall
Urgent need responds load.
Further, in one embodiment of the invention, the load control module is further used for according to
Before high-order low-pass filter parameter and control parameter are filtered and continue to monitor to the local bus frequency change rate, root
The corresponding control parameter of immediate typical operation modes is selected to be initialized according to current electric grid operating condition.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect and advantage of the invention will become from the following description of the accompanying drawings of embodiments
Obviously and it is readily appreciated that, in which:
Fig. 1 is the flow chart according to the distributed urgent need response control mehtod of the embodiment of the present invention；
Fig. 2 is the filter effect schematic diagram according to the bus frequency change rate signal oscillating component of the embodiment of the present invention；
Fig. 3 is the center of inertia frequency change rate and filtered curve synoptic diagram according to the embodiment of the present invention；
Fig. 4 is the control flow chart according to the load control system of the embodiment of the present invention；
Fig. 5 is the structural schematic diagram according to the distributed urgent need response control system of the embodiment of the present invention；
Fig. 6 is the structural schematic diagram according to the distributed urgent need response control system of one embodiment of the invention；
Fig. 7 is the distributed urgent need response control systematic difference schematic diagram of a scenario according to the embodiment of the present invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
The distributed urgent need response control mehtod proposed according to embodiments of the present invention and dress are described with reference to the accompanying drawings
It sets, describes the distributed urgent need response control mehtod proposed according to embodiments of the present invention with reference to the accompanying drawings first.
Fig. 1 is the flow chart of the distributed urgent need response control mehtod of one embodiment of the invention.
As shown in Figure 1, the distribution urgent need response control mehtod the following steps are included:
In step s101, off-line setting calculation is carried out according to history noisy data and power grid typical operation modes, obtains high-order
Low-pass filter parameter and control parameter.
Wherein, in one embodiment of the invention, off-line setting calculation is carried out according to history noisy data, obtains high-order lowpass
Filter parameter.
It is understood that step S101 includes that high-order low-pass filter debugging and control parameter are adjusted, specifically:
In one embodiment of the invention, the debugging principle of high-order low-pass filter parameter are as follows: in history noisy data
After the filtered curve of frequency change rate and system inertia centre frequency the change rate filtering of middle diverse geographic location busbar voltage
Curve essentially coincide under the premise of, the value of cutoff frequency is as big as possible.
Specifically, high-order low-pass filter is debugged
Spectrum analysis is made to the frequency change rate curve of bus main in history noisy data first, by itself and the center of inertia
The result of spectrum analysis of frequency change rate signal compares, so that it is determined that the oscillating component of the bus frequency change rate signal
Frequency range [fLk,fHk].The frequency change rate oscillating component spectral range of all main buses is [min (fLk),max(fHk)],
Suitable high-order low-pass filter is selected accordingly, debugs high-order low-pass filter parameter to filter out above-mentioned oscillating component, is extracted used
Property centre frequency rate of change information.Fig. 2 (a) is under certain disturbance, and the frequency change rate curve on each bus, bus 2 is apart from event
Barrier point is close, and the oscillating component of frequency change rate is big, and the distance fault point of bus 1 and 3 is remote, and oscillating component is small, each bus frequency variation
Rate is all variant with center of inertia frequency change rate.As shown in Fig. 2 (b), after selecting appropriate high-order low-pass filter and parameter,
The oscillating component of the frequency change rate of different buses is available effectively to be filtered out, and filtered curve and has carried out same filtering
The center of inertia frequency change rate curve co-insides of processing.As shown in Fig. 2 (b), filtered frequency change rate curve minimum point
f′nadirReflect the size of system disturbance amount.Since curve reaches f 'nadirThe preceding characteristic with monotone decreasing, therefore the value can
Easily to measure.The starting threshold value that distributed AC servo system substation is arranged is f 'int, when filtered frequency change rate is lower than the value
Shi Jinhang f 'nadirMeasurement, and accordingly carry out load cut off.The starting time of substation is tint, actuation time tact。
Further, in one embodiment of the invention, off-line setting calculation is carried out according to power grid typical operation modes, obtained
Control parameter specifically includes: according to power grid typical operation modes, system single busbar simulation model is built, in unit power vacancy
The lower emulation of disturbance measures system inertia centre frequency change rate curve, and obtains disturbance moment frequency change rate f 'T0；According to high-order
Low-pass filter parameter filters center of inertia frequency change rate curve, obtains curve minimum point f ' after filteringmin；According to single mother
Line model emulation obtains system frequency and falls to fTWhen corresponding power shortage Δ PT；To which control parameter be calculated, wherein control
Parameter processed includes adjusted coefficient KsetWith movement threshold value f 'T。
Specifically, control parameter is adjusted
According to power grid typical operation modes, power grid single busbar simulation model is configured, and is emulated using above-mentioned simulation model
Center of inertia frequency change rate curve under unit power vacancy out, and filtered according to the high-order lowpass that spectrum analysis passes over
Device parameter setting high-order low-pass filter is filtered the curve.Fig. 3 is that the center of inertia frequency under unit power vacancy becomes
The curve of rate curve filtering front and back.The center of inertia frequency change rate for filtering the Wavefront Perturbation moment is f 'T0, curve is minimum after filtering
Point is f 'min, then correction factor
Kset=f 'T0/f′min (1)
Assuming that low-frequency load shedding first run initiation value is fT, show that system frequency falls to f by single busbar model emulationTWhen it is corresponding
Power shortage Δ PT, then distributed urgent need response control apparatus acts threshold value
f′T=Δ PT·f′min (2)
KsetWith f 'TAs control parameter.It is worth noting that, corresponding to each power grid typical operation modes, can adjust
One group of KsetWith f 'TValue.
In step s 102, high-order low-pass filter parameter and control parameter are sent to each distributed AC servo system substation, with
Local bus frequency change rate is filtered and is continued to monitor according to high-order low-pass filter parameter and control parameter.
In step s 103, if filtered frequency change rate breaks starting threshold value by a fall, load is controlled according to control parameter.
It is understood that as shown in figure 4, first according to the immediate typical operation side of current electric grid operating condition selection
The corresponding control parameter of formula is initialized.Then, continue the filtered frequency change rate signal that receiving step S102 is transmitted,
Wherein, in one embodiment of the invention, load is controlled according to control parameter, comprising: the minimum value of frequency change rate is obtained,
And judge whether minimum value is more than movement threshold value；If it exceeds movement threshold value, then obtain and locally answer cutting load, and by directly negative
The urgent need response load that the distributed AC servo system substation that the excision of lotus control device breaks movement threshold value by a fall is polymerize.
Specifically, as shown in figure 4, judging whether the signal meets f ' < f 'intIf the result is negative, then frequency is continued to
Change rate signal, if result be it is yes, continue to measure the signal minimum, judge f 'nadir<f′TIt is whether true.If f 'nadir<
f′TIt is invalid, then frequency change rate signal is continued to, if so, it is then calculated by formula (3) and locally answers cutting load amount:
Wherein, Δ PRkCutting load amount, P are answered for k-th of distributed AC servo system substationRkIt can be cut for k-th of distributed AC servo system substation
The load upper limit, NRFor the sum of distributed AC servo system substation, f 'nadir_kThe local frequency change rate measured for the control sub-station is most
Small value.Finally, the load of control response is cut off.
To sum up, the distributed urgent need response control mehtod that the embodiment of the present invention proposes, it is short to can be used for electric system
The control of phase frequency stabilization, the foundation according to the size of filtered local bus frequency change rate as control, and frequency becomes
Rate is one and disturbs more sensitive signal to system power, can effectively improve the speed of response, and use urgent need
Response technology actively cuts off a part of load in time, to greatly reduce load loss, effectively improves the effect and warp of control
Ji property is simple easily to realize.
The distributed urgent need response control proposed according to embodiments of the present invention referring next to attached drawing description fills system.
Fig. 5 is the structural schematic diagram of the distributed urgent need response control dress system of one embodiment of the invention.
As shown in figure 5, distribution urgent need response control dress system 10 includes: off-line setting calculation module 100, at signal
Manage module 200 and load control module 300.
Wherein, off-line setting calculation module 100 is used to be carried out according to history noisy data and power grid typical operation modes offline whole
It is fixed, obtain high-order low-pass filter parameter and control parameter.Signal processing module 200 be used for high-order low-pass filter parameter and
Control parameter is sent to each distributed AC servo system substation, with according to high-order low-pass filter parameter and control parameter to local bus frequency
Rate change rate is filtered and continues to monitor.If load control module 300 breaks actuation threshold by a fall for filtered frequency change rate
Value then controls load according to control parameter.The system 10 of the embodiment of the present invention can be used for power-system short-term frequency stabilization
Control, effectively improves the speed of response, and greatly reduce load loss, and effectively improve the effect and economy of control,
It is simple easily to realize.
Specifically, as shown in fig. 6, the system 10 of the embodiment of the present invention is by off-line setting calculation module 100 and local controller group
At.Off-line setting calculation module 100 is arranged in control centre, including high-order low-pass filter debugging submodule and control parameter adjusting
Submodule, wherein high-order low-pass filter debugs submodule and the function of control parameter adjusting submodule can be respectively referring to upper
State the introduction of the high-order low-pass filter debugging and control parameter adjusting in embodiment.Local controller is arranged in distributed AC servo system
On substation, including signal processing module 200 and load control module 300, signal processing module 200 is according to high-order low-pass filter
The high-order low-pass filter parameter that debugging submodule passes over, is filtered local bus frequency change rate, filters
Signal afterwards is transmitted to load control module 300.
Further, in one embodiment of the invention, load control module 300 is further used for obtaining frequency variation
The minimum value of rate, and judge whether minimum value is more than movement threshold value, when being more than movement threshold value, obtains and locally answer cutting load, and
Load is responded by the urgent need that the distributed AC servo system substation that the excision of direct load control device breaks movement threshold value by a fall is polymerize.
Further, in one embodiment of the invention, load control module 300 is further used for low according to high-order
Before bandpass filter parameter and control parameter are filtered and continue to monitor to local bus frequency change rate, according to current electric grid
Operating condition selects the corresponding control parameter of immediate typical operation modes to be initialized.
The application scenarios of a typical distributed urgent need response control system 10 below, as shown in fig. 7, of the invention
Specific embodiment:
1, the history noisy data and power grid typical operation modes that control centre records according to EMS/WAMS system carry out from
Line adjusting obtains suitable high-order low-pass filter parameter and control parameter and is sent by lower-cost slow communication route
To each distributed AC servo system substation.
2, distributed AC servo system substation is arranged on each main bus, rings including local controller and the urgent need being polymerize
Answer load.
3, the local controller of each distributed AC servo system substation is joined according to the high-order low-pass filter of control centre's off-line setting calculation
Several and control parameter, is filtered and continues to monitor to local bus frequency change rate.
4, when local controller monitors that filtered frequency change rate signal breaks starting threshold value by a fall, starting control is surveyed
The minimum point for obtaining the signal judges whether to be more than movement threshold value, if being more than, calculates and locally answers cutting load, and by directly bearing
Lotus control device cuts off the urgent need response load that the substation is polymerize.
It should be noted that the aforementioned explanation to distributed urgent need response control mehtod embodiment is also applied for
The distributed urgent need response control apparatus of the embodiment, details are not described herein again.
The distributed urgent need response control system proposed according to embodiments of the present invention, can be used for power-system short-term
The control of frequency stabilization, the foundation according to the size of filtered local bus frequency change rate as control, and frequency changes
Rate is one and disturbs more sensitive signal to system power, can effectively improve the speed of response, and ring using urgent need
It answers technology actively to cut off a part of load in time, to greatly reduce load loss, effectively improves the effect and economy of control
Property, it is simple easily to realize.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or N number of embodiment or example.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, " N number of " is meant that at least two, such as two, three
Deng unless otherwise specifically defined.
Any process described otherwise above or method description are construed as in flow chart or herein, and expression includes
One or it is more N number of for realizing custom logic function or process the step of executable instruction code module, segment or portion
Point, and the range of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discussed suitable
Sequence, including according to related function by it is basic simultaneously in the way of or in the opposite order, Lai Zhihang function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
Expression or logic and/or step described otherwise above herein in flow charts, for example, being considered use
In the order list for the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (such as computer based system, including the system of processor or other can be held from instruction
The instruction fetch of row system, device or equipment and the system executed instruction) it uses, or combine these instruction execution systems, device or set
It is standby and use.For the purpose of this specification, " computer-readable medium ", which can be, any may include, stores, communicates, propagates or pass
Defeated program is for instruction execution system, device or equipment or the dress used in conjunction with these instruction execution systems, device or equipment
It sets.The more specific example (non-exhaustive list) of computer-readable medium include the following: being electrically connected with one or N number of wiring
Socket part (electronic device), portable computer diskette box (magnetic device), random access memory (RAM), read-only memory (ROM),
Erasable edit read-only storage (EPROM or flash memory), fiber device and portable optic disk read-only storage
(CDROM).In addition, computer-readable medium can even is that the paper that can print described program on it or other suitable Jie
Matter, because can then be edited, be interpreted or when necessary with other for example by carrying out optical scanner to paper or other media
Suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each section of the invention can be realized with hardware, software, firmware or their combination.Above-mentioned
In embodiment, software that N number of step or method can be executed in memory and by suitable instruction execution system with storage
Or firmware is realized.Such as, if realized with hardware in another embodiment, following skill well known in the art can be used
Any one of art or their combination are realized: have for data-signal is realized the logic gates of logic function from
Logic circuit is dissipated, the specific integrated circuit with suitable combinational logic gate circuit, programmable gate array (PGA), scene can compile
Journey gate array (FPGA) etc..
Those skilled in the art are understood that realize all or part of step that above-described embodiment method carries
It suddenly is that relevant hardware can be instructed to complete by program, the program can store in a kind of computer-readable storage medium
In matter, which when being executed, includes the steps that one or a combination set of embodiment of the method.
It, can also be in addition, each functional unit in each embodiment of the present invention can integrate in a processing module
It is that each unit physically exists alone, can also be integrated in two or more units in a module.Above-mentioned integrated mould
Block both can take the form of hardware realization, can also be realized in the form of software function module.The integrated module is such as
Fruit is realized and when sold or used as an independent product in the form of software function module, also can store in a computer
In read/write memory medium.
Storage medium mentioned above can be read-only memory, disk or CD etc..Although having been shown and retouching above
The embodiment of the present invention is stated, it is to be understood that above-described embodiment is exemplary, and should not be understood as to limit of the invention
System, those skilled in the art can be changed above-described embodiment, modify, replace and become within the scope of the invention
Type.
Claims (10)
1. a kind of distribution urgent need response control mehtod, which comprises the following steps:
Off-line setting calculation is carried out according to history noisy data and power grid typical operation modes, obtains high-order low-pass filter parameter and control
Parameter processed；
The high-order low-pass filter parameter and control parameter are sent to each distribution by lower-cost slow communication route
Formula control sub-station, local bus frequency change rate is filtered and be continued to monitor according to the parameter and control parameter；With
And
If filtered frequency change rate breaks the starting threshold value by a fall, load is controlled according to the control parameter.
2. being obtained high the method according to claim 1, wherein carrying out off-line setting calculation according to history noisy data
Rank low-pass filter parameter.
3. according to method described in right 2, which is characterized in that the debugging principle of the high-order low-pass filter parameter are as follows: protecting
The filtered curve of frequency change rate and the correspondence system for demonstrate,proving diverse geographic location busbar voltage in the history noisy data are used
Under the premise of the frequency of the property filtered curve voltage of centre frequency change rate essentially coincides, cutoff frequency value is as big as possible.
4. being obtained the method according to claim 1, wherein carrying out off-line setting calculation according to power grid typical operation modes
Control parameter is taken, is specifically included: according to the power grid typical operation modes, system single busbar simulation model is built, in specific work
The lower emulation of rate vacancy disturbance measures system inertia centre frequency change rate curve, and obtains disturbance moment frequency change rate f 'T0；It presses
The center of inertia frequency change rate curve is filtered according to the high-order low-pass filter parameter, obtains curve minimum point after filtering
f′min；System frequency, which is obtained, according to the single busbar model emulation falls to fTWhen corresponding power shortage Δ PT；To be calculated
Control parameter, wherein the control parameter includes adjusted coefficient KsetWith movement threshold value f 'T。
5. according to the method described in claim 4, it is characterized in that, the adjusted coefficient KsetCalculation formula are as follows:
Kset=f 'T0/f′min,
The movement threshold value f 'TCalculation formula are as follows:
f′T=Δ PT·f′min。
6. the method according to claim 1, wherein described control load according to the control parameter, comprising:
The minimum value of the filtered frequency change rate is obtained, and judges whether the minimum value is more than movement threshold value；
If it exceeds the movement threshold value, then obtain and locally answer cutting load, and institute is broken by a fall by the excision of direct load control device
State the urgent need response load that the distributed AC servo system substation of movement threshold value is polymerize.
7. according to the method described in claim 6, it is characterized in that, the calculation formula of cutting load is answered in the local are as follows:
Wherein, Δ PRkCutting load amount, P are answered for k-th of distributed AC servo system substationRkIt can cutting load for k-th of distributed AC servo system substation
Measure the upper limit, NRFor the sum of distributed AC servo system substation, f 'nadir_kThe local frequency change rate minimum value measured for the control sub-station.
8. method according to claim 1-7, which is characterized in that according to the high-order low-pass filter parameter
Before the local bus frequency change rate is filtered and is continued to monitor with control parameter, further includes:
The corresponding control parameter of immediate typical operation modes is selected to be initialized according to current electric grid operating condition.
9. a kind of distribution urgent need response control system characterized by comprising
Off-line setting calculation module obtains high-order for carrying out off-line setting calculation according to history noisy data and power grid typical operation modes
Low-pass filter parameter and control parameter；
Signal processing module, for the high-order low-pass filter parameter and control parameter to be sent to each distributed AC servo system
It stands, to be filtered according to the high-order low-pass filter parameter and control parameter to local bus frequency change rate and persistently be supervised
It surveys；And
Load control module, if the starting threshold value is broken by a fall for filtered frequency change rate, according to the control parameter
Control load.
10. system according to claim 9, which is characterized in that the load control module is further used for described in acquisition
The minimum value of frequency change rate, and judge whether the minimum value is more than movement threshold value, when being more than the movement threshold value, obtain
Cutting load is locally answered, and is polymerize by the distributed AC servo system substation that the excision of direct load control device breaks the movement threshold value by a fall
Urgent need respond load；And it is also used to female to the local according to the high-order low-pass filter parameter and control parameter
Before line frequency change rate is filtered and continues to monitor, according to the immediate typical operation side of current electric grid operating condition selection
The corresponding control parameter of formula is initialized.
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| CN103956747A (en) * | 2014-03-28 | 2014-07-30 | 西安交通大学 | Self-adaptive low frequency load shedding method based on local response information |
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| EP3024110A2 (en) * | 2014-11-21 | 2016-05-25 | Siemens Industry, Inc. | Systems, methods and apparatus for improved regulation of energy delivery systems |
| CN106549422A (en) * | 2016-12-07 | 2017-03-29 | 中国南方电网有限责任公司 | A kind of AGC emergency control methods and system based on frequency change rate |
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| CN103956747A (en) * | 2014-03-28 | 2014-07-30 | 西安交通大学 | Self-adaptive low frequency load shedding method based on local response information |
| CN103956746A (en) * | 2014-03-28 | 2014-07-30 | 西安交通大学 | Automatic-adaptation under-frequency load shedding method based on frequency changing rate response |
| CN104300568A (en) * | 2014-08-20 | 2015-01-21 | 华南理工大学 | Frequency stabilization control method for alternating-current/direct-current series-parallel system |
| EP3024110A2 (en) * | 2014-11-21 | 2016-05-25 | Siemens Industry, Inc. | Systems, methods and apparatus for improved regulation of energy delivery systems |
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