CN106505607A - A kind of multiple-circuit line additional frequency restriction controller control method - Google Patents
A kind of multiple-circuit line additional frequency restriction controller control method Download PDFInfo
- Publication number
- CN106505607A CN106505607A CN201611092279.6A CN201611092279A CN106505607A CN 106505607 A CN106505607 A CN 106505607A CN 201611092279 A CN201611092279 A CN 201611092279A CN 106505607 A CN106505607 A CN 106505607A
- Authority
- CN
- China
- Prior art keywords
- frequency
- power
- term
- short
- overload
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
Abstract
The embodiment of the invention discloses a kind of multiple-circuit line additional frequency restriction controller control method, it is adaptable to the multiple-circuit line system of Asynchronous Interconnection sending end, its step includes default regulation and control initial frequency threshold value Δ fonTerminate frequency threshold Δ f with regulation and controloff；Frequency deviation f is calculated, whether determination frequency deviation delta f is more than regulation and control initial frequency threshold value Δ fon；If so, the multiple-circuit line of Asynchronous Interconnection is then directed to, by the conveying power that " staged " control strategy rationally arranges each time direct current.The embodiment of the invention discloses a kind of multiple-circuit line additional frequency restriction controller control method, by " staged " control strategy, multiple-circuit line additional frequency limiter is rationally set, can regulate and control in order stage by stage, step by step during frequency is soaring, avoid each direct current FLC in the case of power grid accident while, unordered regulation and control action cause overshoot, it is ensured that the controllability regulated and controled by direct current.
Description
Technical field
The present invention relates to electric power system stability control technical field, more particularly to a kind of multiple-circuit line additional frequency restriction
Controller control method.
Background technology
HVDC transmission system has the advantage of Large Copacity, long distance power transmission, and at present, China " transfers electricity from the west to the east " in engineering
HVDC with AC system in parallel power transmission mode has been employed.Alternating current-direct current system under AC/DC parallel mode, in electrical network
System will produce reciprocal influence, and even straight-flow system breaks down, then AC system will also be affected.In order to avoid because straight
Stream failure causes ac and dc systemses to influence each other and causes power grid accident, two or more electrical networks can be carried out Asynchronous Interconnection, example
Such as, China will realize the Asynchronous Interconnection of Yunnan Power System and south electric network.
Under electrical network Asynchronous Interconnection mode, if there is direct current locking failure, the frequency stable problem of sending end electrical network is very prominent
Go out, there are frequency regulation and control causes the risk of mains breakdown.At present, its measure for solving mainly includes that sending end unit primary frequency modulation is moved
Make, steady control is cut machine measure, high week and cuts machine measure, the support of direct-current emergency power and the restriction control of direct current additional frequency
(frequency limit control, FLC) etc..Wherein, the time constant of sending end unit primary frequency modulation action is larger, in short-term
The interior mitigation to system power excess quantity is extremely limited, and therefore system frequency still comparatively fast can rise.Machine and height week are cut in steady control
Machine measure being cut as the security perimeter of electrical network, when there is direct current one pole locking, being pressed《Guiding rules of power system safety and stability》Do not permit
Permitted to take corresponding measure, and its action effect limited by stability control device and information exchange transmission and there is certain " delayed " property,
Suppress cost larger (needing to cut off larger capacity unit) in the case where high-capacity direct current sends failure mode to mains frequency.Direct current is tight
Anxious power is supported and can be alleviated and send receiving-end system according to the conveying power of dc power regulating command fast lifting non-faulting direct current
Unbalanced power, but lifted dc power amount be to be adjusted based on forecast accident, it is impossible to entered according to running situation
Row is adjusted.
Direct current additional frequency restriction control (hereinafter referred direct current FLC) is similar with the support of direct-current emergency power, will be in system
Frequency departure quickly lifts (or reduction) DC line conveying power when exceeding certain certain value, closed with reducing direct current as far as possible
The sending power surplus amount that lock is caused, alleviates unstable, the stability of raising network system of the high frequency in network system；
But, the difference of the two is, direct current FLC can adjust dc power reference value according to the real-time frequency deviation of sending end electrical network,
Control mode is more effectively, flexibly.Therefore, it is furnished with FLC current DC transmission system more.It is furnished with the DC transmission system of FLC
One can be regarded as there is fm capacity and governing speed heavy-duty generator group faster with equivalent, can quickly improve sending end
System resists the ability of power disturbance, strengthens sending frequency stability, while it is adjustable online also to carry out multiple-circuit line FLC
Coordinated Control Scheme.
But, direct current FLC is confined to the application in single time direct current islet operation, or the coordination control needs because of multiple-circuit line
Writing to each other between many straight-flow systems and regional power grid control system is set up, and dynamic modification parameter is because power grid security is examined
Do not have exploitativeness, therefore, for the sending end electrical network of Asynchronous Interconnection, when direct current locking occurs, each time direct current FLC is simultaneously by each
The regulation and control action of direct current maximum ability of regulation and control " as a swarm of bees " formula, causes system power overshoot.
Content of the invention
A kind of multiple-circuit line additional frequency restriction controller control method is provided in the embodiment of the present invention, existing to solve
In technology, the regulation and control action of each time direct current FLC " as a swarm of bees " formula causes the problem of system power toning.
In order to solve above-mentioned technical problem, the embodiment of the invention discloses following technical scheme：
A kind of multiple-circuit line additional frequency restriction controller control method, including,
Step S1, the regulation and control initial frequency threshold value Δ f of predetermined DC FLConTerminate frequency threshold Δ f with regulation and controloff；
Step S2, monitors real-time frequency f of sending end electrical network, and according to real-time frequency f and steady frequency f0, calculate frequency inclined
Difference Δ f, i.e. Δ f=f-f0；
Whether step S3, judge frequency deviation f more than the regulation and control initial frequency threshold value Δ fon；
Step S31：If so, then by the conveying power of straight-flow system by specified conveying power P0It is adjusted to default high load capacity
Conveying power PS1, wherein, the high load capacity conveys power PS1For specified conveying power P0The default multiple K of overload in short-term1
Times, i.e. PS1=K1P0；
Step S4：Straight-flow system conveys power P with high load capacityS1After the default time limit t of overload in short-term of continuous service, will be straight
The conveying power of streaming system conveys power P by the high load capacityS1It is adjusted to the specified conveying power P of default underloadS2, wherein,
The underload conveys power PS2For specified conveying power P0Default long-term overload multiple K2Times, i.e. PS2=K2P0；
Step S5：Frequency deviation f of real-time monitoring sending end electrical network, and whether determination frequency deviation delta f is less than the tune
Control terminates frequency threshold Δ foff；
Step S51：If so, the conveying power of straight-flow system is conveyed power P by the underload thenS2It is adjusted to the volume
Power P is conveyed surely0.
Preferably, also include before step S1, determine control parameter, the control parameter includes overload multiple in short-term
K1, specifically include,
Peak load multiple K according to straight-flow systemm, multigroup pre-selection overload multiple K in short-term is set10, wherein, K10＜
Km；
Make straight-flow system respectively in each group of pre-selection overload multiple K in short-term10Corresponding high load capacity conveys power PS10Lower fortune
OK, wherein, PS10=K10P0, and obtain the temporary transient active power of straight-flow system；
Judge each group of pre-selection overload multiple K in short-term1Whether corresponding temporary transient active power is equal to pre-selection mistake in short-term
Load multiple K10Corresponding high load capacity conveys power PS10；
If so, then by preselected group overload multiple K in short-term10It is set to alternative overload multiple in short-term；
In alternative overload multiple in short-term, select numerical value maximum alternative overload multiple in short-term is used as overload in short-term
Multiple K1.
Preferably, regulation and control terminate frequency threshold Δ foffFor the frequency fluctuation scope under sending end electrical network normal operating mode.
Preferably, regulate and control initial frequency threshold value Δ fonMore than the frequency fluctuation scope under sending end electrical network normal operating mode.
From above technical scheme, provided in an embodiment of the present invention the embodiment of the invention discloses a kind of multiple-circuit line is attached
Plus Frequency limit controller control method, it is adaptable to the multiple-circuit line system of Asynchronous Interconnection sending end, plan is controlled by " staged "
Rationally multiple-circuit line additional frequency limiter is set slightly, can be regulated and controled in order stage by stage, step by step during frequency is soaring, it is to avoid
In the case of power grid accident, " as a swarm of bees " action of each direct current FLC regulation and control causes overshoot, ensured direct current is regulated and controled can
Control property.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, for those of ordinary skill in the art
Speech, on the premise of not paying creative work, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is that a kind of flow process of multiple-circuit line additional frequency restriction controller control method provided in an embodiment of the present invention is shown
It is intended to；
Fig. 2 is that each time direct current FLC control parameter of Yunnan Power System arranges figure.
Specific embodiment
In order that those skilled in the art more fully understand the technical scheme in the present invention, below in conjunction with of the invention real
Apply the accompanying drawing in example, to the embodiment of the present invention in technical scheme be clearly and completely described, it is clear that described enforcement
Example is only a part of embodiment of the invention, rather than whole embodiment.Embodiment in based on the present invention, this area are common
The every other embodiment obtained under the premise of creative work is not made by technical staff, should all belong to protection of the present invention
Scope.
When direct current locking failure causes Asynchronous Interconnection sending high frequency occur, i.e., system frequency deviation is certain more than certain
During value, non-faulting direct current FLC will arrange direct current FLC control strategies using " staged " method, first by the conveying work(of straight-flow system
Rate is adjusted to high load capacity conveying power, and within a short period of time, the conveying power of fast lifting DC line rapidly reduces direct current
The sending power surplus amount that locking is caused；Then, the conveying power of straight-flow system is adjusted to underload conveying power, with
One more steady, safe speed conveys the excess power of sending；Finally, effectively alleviate the high frequency problem of system, from
And improve system stability.
Fig. 1 is that a kind of flow process of multiple-circuit line additional frequency restriction controller control method provided in an embodiment of the present invention is shown
It is intended to, as shown in figure 1, a kind of Asynchronous Interconnection sending end multiple-circuit line additional frequency restriction controller control method, including：
Step S1, the regulation and control initial frequency threshold value Δ f of predetermined DC FLConTerminate frequency threshold Δ f with regulation and controloff.
Regulation and control initial frequency threshold value Δ fon, it is the frequency threshold of direct current FLC function ons, i.e., when detecting sending end electrical network
Frequency departure is more than this regulation and control initial frequency threshold value Δ fonWhen, direct current FLC function ons, adjustment direct current conveying quantity of power is specified
The K of conveying power1Again (overload multiple in short-term), and during continuous service t (overload time limit in short-term).
In normal course of operation, the frequency of sending end electrical network will fluctuate network system in certain Near Threshold, for avoiding
When sending end mains frequency deviation fluctuates in this Near Threshold, the misoperation of direct current FLC functions input and state out of service it
Between frequent switching problem, regulate and control initial frequency threshold value Δ fonSelection should avoid the frequency under system normal operating mode
Fluctuation range.In the present embodiment, frequency fluctuation scope under sending end electrical network normal operating mode is 0.05Hz, the tune of direct current FLC
Control initial frequency threshold value Δ fonMore than the frequency fluctuation scope under sending end electrical network normal operating mode, such as 0.1Hz.
Regulation and control terminate frequency threshold Δ foff, it is the frequency threshold of direct current FLC function controllings termination, that is, detects sending end electricity
The frequency departure of net is less than a certain threshold value Δ foffWhen, adjustment direct current conveying quantity of power is nominal operation power, completes direct current FLC
Regulatory function to DC transmission system.
In normal course of operation, sending end mains frequency will fluctuate network system in certain Near Threshold, therefore, when sending
The frequency departure of end electrical network is when this Near Threshold fluctuates, you can assert that network system recovers stable, direct current FLC functions
State out of service.In the present embodiment, regulation and control terminate frequency threshold Δ foffFor the frequency wave under sending end electrical network normal operating mode
Dynamic scope, such as 0.05Hz.
Step S2, monitors real-time frequency f of sending end electrical network, and according to real-time frequency f and steady frequency f0, calculate frequency inclined
Difference Δ f, i.e. Δ f=f-f0.
Step S3, whether determination frequency deviation delta f is more than regulation and control initial frequency threshold value Δ fon.
Step S31：If so, then by the conveying power of straight-flow system by specified conveying power P0It is adjusted to default high load capacity
Conveying power PS1, wherein, high load capacity conveys power PS1For specified conveying power P0The default multiple K of overload in short-term1Times, i.e.,
PS1=K1P0.
Step S4：Straight-flow system conveys power P with high load capacityS1After the default time limit t of overload in short-term of continuous service, will be straight
The conveying power of streaming system conveys power P by high load capacityS1It is adjusted to the specified conveying power P of default underloadS2, wherein, low negative
Lotus conveys power PS2For specified conveying power P0Default long-term overload multiple K2Times, i.e. PS2=K2P0.
Step S5：Frequency deviation f of real-time monitoring sending end electrical network, and less than regulation and control eventually whether determination frequency deviation delta f
Only frequency threshold Δ foff.
Step S51：If so, the conveying power of straight-flow system is conveyed power P by underload thenS2It is adjusted to specified conveying work(
Rate P0.
Also include before step S1, determine that control parameter, control parameter include overload multiple K in short-term1, long-term overload
Multiple K2And the time limit t of overload in short-term.Impact of the different control parameters to system frequency stability is different, in order to arrange rationally
Control parameter, in the present embodiment, the Adjustment effect of different control parameters to system frequency will be emulated, according to simulation result,
Determine preferably control parameter.In control parameter, overload multiple K in short-term1Impact of the selection to direct current FLC control effects
It is the most key, long-term overload multiple K2The selection impact of the time limit t of overload in short-term is relatively small, therefore, subsequently will
To overload multiple K in short-term1Selection process carry out detailed discussing.
Overload multiple K in short-term1Selection mode have multiple, in the present embodiment, its choose comprise the following steps that：
Peak load multiple K according to straight-flow systemm, multigroup pre-selection overload multiple K in short-term is set10, wherein, K10＜
Km；
Make straight-flow system respectively in each group of pre-selection overload multiple K in short-term10Corresponding high load capacity conveys power PS10Lower fortune
OK, wherein, PS10=K10P0, and obtain the temporary transient active power of straight-flow system；
Judge each group of pre-selection overload multiple K in short-term1Whether corresponding temporary transient active power is equal to pre-selection mistake in short-term
Load multiple K10Corresponding high load capacity conveys power PS10；
If so, then by preselected group overload multiple K in short-term10It is set to alternative overload multiple in short-term；
In alternative overload multiple in short-term, select numerical value maximum alternative overload multiple in short-term is used as overload in short-term
Multiple K1.
The selection course of control parameter will be described as a example by a single time straight-flow system below：
According to the peak load multiple of straight-flow system, two groups of control parameters are preset.It should be noted that overload multiple K in short-term1
The peak load multiple of streaming system is must not exceed, in this example, peak load multiple is 1.2, therefore, overload multiple K in short-term1
Selectable greatest measure is 1.2.First group of control parameter be：Overload multiple K in short-term1For 1.1, long-term overload multiple K2
It is 5s for 1.05 and the time limit of overload in short-term t；Second group of control parameter be：Overload multiple K in short-term1For 1.2, long-term overload
Multiple K2It is 5s for 1.1 and the time limit of overload in short-term t.
Impact of the control parameter that two groups of simulation analysis to DC system locking post-fault system frequency stability, its are emulated
As a result it is specially：Under the conditions of first group of control parameter, the temporary transient active power of the direct current conveying of non-faulting straight-flow system is equal to
1.1 corresponding high load capacity of the overload multiple conveying in short-term power 1.1P0, 1.1 times of as specified conveying power.
Under the conditions of second group of control parameter, the temporary transient active power of the direct current conveying of non-faulting straight-flow system is short less than this
When 1.2 corresponding high load capacity of overload multiple convey power 1.2P0, i.e. the active power value of straight-flow system actual fed do not reach
1.2 times to default nominal operation power.Its reason is that non-faulting straight-flow system is under running overload state, directly
The reactive power of streaming system consumption is significantly increased, and the reactive capability that straight-flow system reactive-load compensation equipment is provided is not enough, causes direct current
Voltage has falling for certain amplitude, and therefore straight-flow system conveying active power can not reach overload multiple set in advance.
As can be seen here, to a specific straight-flow system, the overload multiple after direct current FLC is put into except considering AC line
The multiple of overload in short-term on road itself and outside the time limit of overload in short-term, also needs to consider the reactive reserve situation that straight-flow system is actual,
Only in satisfaction less than straight-flow system running overload ability and on the premise of reactive power abundance, could to greatest extent
The effect of frequency stability during direct current FLC additional controllers improve the system failure is played, if the FLC controllers that adjusts are born excessively
Lotus operation multiple is too big, the reactive reserve situation or capability of overload mismatch with actual DC system, then may cause on the contrary
After the system failure, idle not afc voltage is difficult to recover or damage straight-flow system equipment.That is, single time direct current FLC controller
The multiple K1 of overload in short-term be not to be the bigger the better, when meeting straight-flow system running overload ability and reactive reserve premise
Under, it is intended that overload multiple K1 when the larger direct current of selection is too short, preferably to play straight-flow system capability of overload
Reduce the power surplus amount after direct current locking, improve system frequency stability.
To sum up, using 1.1 times in short-term overload multiple with using 1.2 times in short-term overload multiple steady to system transient modelling frequency
Qualitatively improvement difference very little, but using 1.2 times in short-term overload multiple when straight-flow system need to consume more idle
Power, is unfavorable for that post-fault system voltage recovers, and therefore for direct current FLC controllers, first group of control parameter is relatively reasonable.
The selection course of control parameter will be described as a example by a multiple-circuit line system below：
By taking the operation of Yunnan Power System and south electric network Asynchronous Interconnection as an example, wherein, Yunnan Power System include Chu Sui, general emigrant, Jin Zhong,
The straight-flow systems such as forever rich and Niu Cong, choose Chu Sui, general emigrant, Jin Zhong, forever rich 4 times straight-flow systems input FLC functions (cattle is examined from direct current
Consider input emergency DC power support function, do not put into FLC functions).Multiple-circuit line Systematic selection control parameter is contemplated that direct current system
The overload transport capacity (being primarily limited to IGCT junction temperature and cooling water outlet temperature) of system, while it is also contemplated that direct current system
Electrical distance (the tide after main impact input direct current FLC between the nargin of the reactive compensation capacity of system and each straight-flow system
Circulation moves range size and then affects AC system reactive power consumption).
According to all kinds of factors of above-mentioned consideration, in conjunction with Yunnan Power System practical situation, due to Chu Sui, Jin Zhong, forever rich three times straight
Streaming system electrical distance each other is nearer, after arbitrary time direct current occurs locking failure puts into remaining 2 times direct current FLC function
The system load flow transfer scope for causing is less, and the recovery of system stably advantageously, is therefore considered it is contemplated that this 3 times direct currents
FLC adopts larger overload multiple；In combination with each straight-flow system transmission capacity and electric pressure, Chu Sui direct currents and general emigrant are straight
Stream electric pressure is ± 800kV, and transmission capacity has reached 5000MW, and straight-flow system running overload ability is stronger, and in gold
Direct current, forever rich DC voltage level are ± 500kV, and transmission capacity is respectively 3200MW and 3000MW, straight-flow system overload
Service ability is weaker.Yunnan Power System each direct current FLC control parameters are set in conjunction with above-mentioned several respects factor, Fig. 2 is Yunnan Power System
Each direct current FLC control parameters arrange figure, as shown in Fig. 2 arranging the overload multiple in short-term of each straight-flow system FLC controller
K1, running overload time t and long-term overload multiple K in short-term2.For example, the multiple K of overload in short-term of general emigrant's direct current is set1
For 1.10, running overload time t is 5s and long-term overload multiple K in short-term2For 1.05.
According to each time direct current FLC Controlling model parameter that Fig. 2 sets, to each Hui Zhi under Yunnan Power System typical operation modes
Streaming system introduces direct current FLC functions, emulates frequency response situation of the Yunnan Power System under DC system locking failure.According to emulation
As a result understand, when Yunnan Power System occurs under direct current locking failure, remaining non-faulting straight-flow system can be according to the system that detects frequently
Rate deviation size, and direct current FLC functions are put into quickly, the rapid DC line that lifted conveys power, plays to large extent straight
The capability of overload of streaming system improves Yunnan under Asynchronous Interconnection mode so as to play reducing the power surplus amount in Yunnan Power System
The frequency stability of electrical network.In the present embodiment, when the frequency departure for detecting sending end electrical network exceedes default regulation and control initial frequency
During threshold value 0.1Hz, conveying active power is quickly promoted to each straight-flow system the corresponding mistake in short-term of specified conveying power
Load times, for example, general emigrant's direct current will convey 1.1 times that active power is promoted to specified conveying power, and the very first time is by direct current system
Available running overload ability of uniting is used for reducing system power excess quantity, and control mode is simple and practical and effect is significant.
Certainly, overload multiple K in short-term1Other selection modes can also be selected, which belongs to the protection model of the present invention
Enclose.For example, an initial multiple K of overload in short-term is selected1, emulate overload multiple K in short-term1The adjustment of system frequency is imitated
Really, judge this overload multiple K in short-term1Whether system frequency effectively can be adjusted；If can be with, will overload multiple in short-term
K1Increase a default step-length, judge the multiple K of overload in short-term after increasing1Whether system frequency effectively can be adjusted；Directly
To overload multiple K in short-term1System frequency can not be effectively adjusted, then by the multiple K of overload in short-term now1Deduct one in advance
If step-length, the as final multiple K of overload in short-term for determining1.
After a certain straight-flow system in electrical network occurs locking failure, mains frequency changes, non-faulting straight-flow system
System frequency will be detected deviation will occur, and according to the system frequency deviation size for detecting, quick input direct current FLC functions,
Rapid adjustment direct current conveying quantity of power is the K of specified conveying power1Again (overload multiple in short-term), i.e., underload conveys power
PS1, the capability of overload of straight-flow system is played to large extent reducing the power surplus amount in electrical network, improve electricity so as to play
The frequency stability of net.Power P is conveyed with high load capacity in non-faulting straight-flow systemS1After the continuous service time limit t of overload in short-term, will
The conveying power of straight-flow system adjusts the K of specified conveying power2Again (long-term overload multiple), i.e., underload conveys power PS2,
With the excess power that a more steady, safe speed conveys sending.Finally, effectively alleviate the high frequency problem of system,
So as to improve system stability.
Required according to electric network fault characteristic and the control of each DC operation, many times are rationally arranged by " staged " control strategy
After direct current additional frequency limiter, the regulating power of each time direct current FLC can be not only given full play to, can also be during frequency be soaring
Stage by stage, regulate and control in order step by step, it is to avoid each direct current FLC regulation and control regulation and control action simultaneously, unordered in the case of power grid accident is led
The overshoot of cause, has ensured the controllability of direct current ability of regulation and control.Information exchange or differentiation need not be carried out between each direct current, root is only needed
Differentiate according to ac bus frequency, by set arranges value action, with certain reliability.
By the description of above embodiment of the method, those skilled in the art can be understood that the present invention can
Mode by software plus required general hardware platform is realizing, naturally it is also possible to by hardware, but in many cases the former
It is more preferably embodiment.Such understanding is based on, technical scheme substantially makes tribute to prior art in other words
The part that offers can be embodied in the form of software product, and the computer software product is stored in a storage medium, bag
Include some instructions to use so that a computer equipment (can be personal computer, server, or network equipment etc.) executes
The all or part of step of each embodiment method of the invention.And aforesaid storage medium includes：Read only memory (ROM), with
Machine access memorizer (RAM), magnetic disc or CD etc. are various can be with the medium of store program codes.
The above is only the specific embodiment of the present invention, makes skilled artisans appreciate that or realizing this
Bright.Multiple modifications of these embodiments will be apparent to one skilled in the art, as defined herein
General Principle can be realized without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope for causing.
The above is only the specific embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (4)
1. a kind of multiple-circuit line additional frequency restriction controller control method, it is adaptable to the multiple-circuit line system of Asynchronous Interconnection sending end
System, it is characterised in that include,
Step S1, the regulation and control initial frequency threshold value Δ f of predetermined DC FLConTerminate frequency threshold Δ f with regulation and controloff；
Step S2, monitors real-time frequency f of sending end electrical network, and according to real-time frequency f and steady frequency f0, calculate frequency deviation
F, i.e. Δ f=f-f0；
Whether step S3, judge frequency deviation f more than the regulation and control initial frequency threshold value Δ fon；
Step S31：If so, then by the conveying power of straight-flow system by specified conveying power P0It is adjusted to default high load capacity conveying
Power PS1, wherein, the high load capacity conveys power PS1For specified conveying power P0The default multiple K of overload in short-term1Times, i.e.,
PS1=K1P0；
Step S4：Straight-flow system conveys power P with high load capacityS1After the default time limit t of overload in short-term of continuous service, by direct current system
The conveying power of system conveys power P by the high load capacityS1It is adjusted to the specified conveying power P of default underloadS2, wherein, described
Underload conveys power PS2For specified conveying power P0Default long-term overload multiple K2Times, i.e. PS2=K2P0；
Step S5：Frequency deviation f of real-time monitoring sending end electrical network, and less than the regulation and control eventually whether determination frequency deviation delta f
Only frequency threshold Δ foff；
Step S51：If so, the conveying power of straight-flow system is conveyed power P by the underload thenS2It is adjusted to described specified defeated
Send power P0.
2. multiple-circuit line additional frequency restriction controller control method according to claim 1, it is characterised in that step S1
Also include before, determine control parameter, the control parameter includes overload multiple K in short-term1, specifically include,
Peak load multiple K according to straight-flow systemm, multigroup pre-selection overload multiple K in short-term is set10, wherein, K10＜ Km；
Make straight-flow system respectively in each group of pre-selection overload multiple K in short-term10Corresponding high load capacity conveys power PS10Lower operation,
Wherein, PS10=K10P0, and obtain the temporary transient active power of straight-flow system；
Judge each group of pre-selection overload multiple K in short-term1Whether corresponding temporary transient active power is equal to pre-selection overload in short-term times
Number K10Corresponding high load capacity conveys power PS10；
If so, then by preselected group overload multiple K in short-term10It is set to alternative overload multiple in short-term；
In alternative overload multiple in short-term, select numerical value maximum alternative overload multiple in short-term is used as overload multiple in short-term
K1.
3. multiple-circuit line additional frequency restriction controller control method according to claim 1, it is characterised in that
Regulation and control terminate frequency threshold Δ foffFor the frequency fluctuation scope under sending end electrical network normal operating mode.
4. the multiple-circuit line additional frequency restriction controller control method according to claim 1 or 3, it is characterised in that
Regulation and control initial frequency threshold value Δ fonMore than the frequency fluctuation scope under sending end electrical network normal operating mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611092279.6A CN106505607B (en) | 2016-11-30 | 2016-11-30 | A kind of multiple-circuit line additional frequency restriction controller control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611092279.6A CN106505607B (en) | 2016-11-30 | 2016-11-30 | A kind of multiple-circuit line additional frequency restriction controller control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106505607A true CN106505607A (en) | 2017-03-15 |
| CN106505607B CN106505607B (en) | 2018-09-11 |
Family
ID=58329296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611092279.6A Active CN106505607B (en) | 2016-11-30 | 2016-11-30 | A kind of multiple-circuit line additional frequency restriction controller control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106505607B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107086590A (en) * | 2017-06-30 | 2017-08-22 | 南方电网科学研究院有限责任公司 | Control method for coordinating, device and the transmission system of mixed DC station control |
| CN107658897A (en) * | 2017-10-18 | 2018-02-02 | 广东电网有限责任公司电力调度控制中心 | A kind of more direct current frequency limiters based on permanent order regulation |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105552948A (en) * | 2016-02-05 | 2016-05-04 | 国网浙江省电力公司湖州供电公司 | Power grid frequency-modulating method based on flexible direct-current transmission system |
| CN105576662A (en) * | 2014-10-30 | 2016-05-11 | Ls产电株式会社 | Multiple-tuned filter design method for HVDC system |
| US20160285263A1 (en) * | 2015-03-26 | 2016-09-29 | State Grid Hebei Electric Power Research Institute | Anti-islanding method for distributed generator in direct current distribution grid and anti-islanding device therefor |
| EP3136534A1 (en) * | 2014-07-04 | 2017-03-01 | NR Electric Co., Ltd. | Direct-current transmission inversion-side frequency control method |
-
2016
- 2016-11-30 CN CN201611092279.6A patent/CN106505607B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3136534A1 (en) * | 2014-07-04 | 2017-03-01 | NR Electric Co., Ltd. | Direct-current transmission inversion-side frequency control method |
| CN105576662A (en) * | 2014-10-30 | 2016-05-11 | Ls产电株式会社 | Multiple-tuned filter design method for HVDC system |
| US20160285263A1 (en) * | 2015-03-26 | 2016-09-29 | State Grid Hebei Electric Power Research Institute | Anti-islanding method for distributed generator in direct current distribution grid and anti-islanding device therefor |
| CN105552948A (en) * | 2016-02-05 | 2016-05-04 | 国网浙江省电力公司湖州供电公司 | Power grid frequency-modulating method based on flexible direct-current transmission system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107086590A (en) * | 2017-06-30 | 2017-08-22 | 南方电网科学研究院有限责任公司 | Control method for coordinating, device and the transmission system of mixed DC station control |
| CN107086590B (en) * | 2017-06-30 | 2023-11-17 | 南方电网科学研究院有限责任公司 | Coordination control method, device and power transmission system for hybrid direct current station control |
| CN107658897A (en) * | 2017-10-18 | 2018-02-02 | 广东电网有限责任公司电力调度控制中心 | A kind of more direct current frequency limiters based on permanent order regulation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106505607B (en) | 2018-09-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Ouyang et al. | A predictive method of LCC-HVDC continuous commutation failure based on threshold commutation voltage under grid fault | |
| CN107959303B (en) | Reactive voltage coordination control method for extra-high voltage direct current converter station and near-field transformer substation | |
| DK2351189T3 (en) | Frequency responsive, charge-maintaining management of electricity storage systems for auxiliary services on an electrical grid. | |
| CN107069766B (en) | Reactive compensation coordination control method in direct-current emergency power support process | |
| CN108736500B (en) | Optimized tripping method and device for regional power grid surplus power direct current delivery system | |
| CN105591401B (en) | A kind of photovoltaic low-voltage ride-through method of the injection containing reactive current | |
| CN108964068A (en) | A kind of low-frequency load shedding scheme setting method adapting to different capacity vacancy | |
| CN109698507A (en) | A kind of phase modifier and Static Var Compensator control method for coordinating and system | |
| CN105552893A (en) | DC frequency limiter control method | |
| CN104104102A (en) | Voltage source converter type multiport direct current transmission system steady state working point optimization method | |
| CN107565594A (en) | Power ascension amount distribution method between more direct currents that consideration receiving end voltage deviation influences | |
| CN106505607B (en) | A kind of multiple-circuit line additional frequency restriction controller control method | |
| Tan et al. | Multi-area automatic generation control scheme considering frequency quality in Southwest China grid: Challenges and solutions | |
| CN110544953B (en) | Method and system for checking steady-state voltage after extra-high voltage direct current fault | |
| Noris et al. | Power system black-start and restoration with high share of power-electronic converters | |
| CN104953623B (en) | The control method of photovoltaic plant inverter under a kind of operating mode of rationing the power supply | |
| CN108879733B (en) | Coordination control method for improving power grid frequency stability after direct current blocking | |
| CN108365611A (en) | A kind of control method of the reactive-load compensation of photovoltaic power station | |
| CN113158566B (en) | User ordered power utilization control method, system and medium based on demand side | |
| CN110011320B (en) | Reactive voltage optimization control method and system for extra-high voltage alternating current transformer substation | |
| CN110571813B (en) | User low-voltage management method and device based on energy storage regulation | |
| CN107681687A (en) | Distributed system bus Overvoltage suppressing control method and system based on energy storage | |
| CN105162126A (en) | Regional voltage control method in local dispatching automatic voltage control (AVC) system | |
| CN111209673A (en) | Design method of novel wide-width voltage-regulating distribution transformer | |
| CN105226630B (en) | The control method and system of a kind of direct current micro-grid system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |