CN110514953A - Based on generator rotor angle, the simulation recognition method and system of the electric network fault of voltage aliasing - Google Patents
Based on generator rotor angle, the simulation recognition method and system of the electric network fault of voltage aliasing Download PDFInfo
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- CN110514953A CN110514953A CN201910226054.2A CN201910226054A CN110514953A CN 110514953 A CN110514953 A CN 110514953A CN 201910226054 A CN201910226054 A CN 201910226054A CN 110514953 A CN110514953 A CN 110514953A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
The invention discloses a kind of based on generator rotor angle, the simulation recognition method and system of the electric network fault of voltage aliasing, comprising: carries out fault scanning to the power grid, determines that the generator rotor angle, Voltage Instability aliasing failure occur for the power grid；Judge whether the power grid occurs Fisrt fault or whether the power grid occurs the second failure；If the Fisrt fault occurs for the power grid, determine that the electric network fault is Voltage Instability failure.If second failure occurs for the power grid, determine that the electric network fault is oscillation of power failure.The explanation carried out from mechanistic point, intelligent comprehensive assess generator rotor angle failure, the simulation recognition method of Voltage Instability aliasing failure in power grid.
Description
Technical field
The invention belongs to electrical simulation identification technique fields, and in particular to a kind of power grid event based on generator rotor angle, voltage aliasing
The simulation recognition method and system of barrier.
Background technique
With non-traditional load growth (induction-motor load), power grid major network rack build relatively lag behind, generator access
It is the System History origin cause of formation, new-generation class equipment (blower, photovoltaic, electric car, energy storage device) high density, decentralized to power grid
The complexity of access, molding power grid form increases year by year, and the analysis for forming power grid becomes increasingly complex, wherein voltage stability and function
Angle stability aliasing type problem occurs often, and shows as the trend gradually increased, occurs now and then in industry calculates, is in recent years
Come one of the emphasis paid close attention to.In this context, single power-angle stability theory and single voltage stabilization are theoretical directly corresponding
Explain some molding power grid temporarily steady process analysis mode it is impossible to meet operation of power networks control analysis and development
The needs of analysis, analysis construction is complete, clearly the difficulty of genetic analysis chain of evidence is increasing.
With press two aspect of small, power grid open loop on the exchange unit of power grid greatly and it is comprehensive caused by small net of big machine caused
Current aliasing type problem gradually increases, and the aliasing type analysis method in ultra-large AC network is fewer, but still may be used
To be divided into two classes:
On the one hand the method calculated for analytical expression actual parameter mechanism；In the case that parameter is few, it can analyze
It is very accurate；But for there are the large-scale power systems of thousand grades of elements and ten thousand grades of elements, often parameter amount is excessive, performance characteristic
Participation amount be often group of planes feature, load group character.From " presentation aliasing type unstability feature " looking into " identifying single unit "
Process is looked for be likely to the workload of an astronomical order of magnitude.
On the other hand for the intelligent comprehensive appraisal procedure of no analytic solutions expression formula: very bright in certain local domain effects
It is aobvious, but because not being the explanation carried out from mechanistic point, so, popularization practical also faces the predicament of " lacking mechanism to explain ".
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.
For this purpose, the first purpose of this invention is to propose a kind of emulation based on generator rotor angle, the electric network fault of voltage aliasing
Discrimination method.
The first purpose of this invention is to propose the simulation recognition system of the electric network fault based on generator rotor angle, voltage aliasing.
In order to achieve the above objectives, the electric network fault based on generator rotor angle, voltage aliasing that first aspect present invention embodiment proposes
Simulation recognition method, comprising:
S1: carrying out fault scanning to the power grid, determines that the generator rotor angle, Voltage Instability aliasing failure occur for the power grid.
S2: judge whether the power grid occurs Fisrt fault or whether the power grid occurs the second failure.
S21: if the Fisrt fault occurs for the power grid, determine that the electric network fault is Voltage Instability failure.
S22: if second failure occurs for the power grid, determine that the electric network fault is oscillation of power failure.
According to one embodiment of present invention, the determination electric network fault is Voltage Instability failure, comprising:
S31: setting at the first time, terminates the event of power grid where the Fisrt fault in the first time.
S31: judging whether Voltage Instability failure described in the power grid is eliminated, if the network voltage unstability failure disappears
It removes, determines that the network voltage cause of destabilization is the dynamic reactive power deficiency where the power grid.
S32: if the network voltage unstability failure is not eliminated, determine the electric network fault for generator rotor angle, the event of voltage aliasing
Barrier searches generator rotor angle and flies out unit, sets for the second time, the setting guilty culprit power network line is non-shorting in second time
Tripping, and cut off unit.
According to one embodiment of present invention, the determination electric network fault is Voltage Instability failure, further includes:
S41: continuing to judge whether the network voltage unstability failure is eliminated, if the network voltage unstability failure disappears
It removes, determines that the network voltage cause of destabilization is that the excision of the power grid excitation system causes.
S44: if the network voltage unstability failure is not eliminated also, determine the network voltage cause of destabilization for generator rotor angle vibration
It swings.
According to one embodiment of present invention, the determination electric network fault is oscillation of power failure, comprising:
S51: it calculates the centre coordinate of the power grid power-angle oscillation, calculate the network voltage unstability coordinate.
S52: the centre coordinate is analyzed to each bus voltage amplitude fluctuation situation in power missing area, according to the bus
Voltage magnitude stability bandwidth determine electrical distance coordinate of the busbar voltage apart from the oscillation center coordinate.
S53: electrical distance coordinate, power grid electricity according to the busbar voltage apart from the power grid oscillation center coordinate
Unstability coordinate is pressed, the power grid is calculated and generator rotor angle failure probability occurs.
According to one embodiment of present invention, the Fisrt fault is short circuit broken string tripping fault, and second failure is
The direct miss fault of power.
Second aspect of the present invention embodiment propose based on generator rotor angle, the simulation recognition system of the electric network fault of voltage aliasing,
Include:
Determining module determines that the generator rotor angle, Voltage Instability occur for the power grid for carrying out fault scanning to the power grid
Aliasing failure.
Judgment module, for judging whether the power grid occurs Fisrt fault or whether the power grid occurs the second event
Barrier.
First determining module, if the Fisrt fault occurs for the power grid, for determining that the electric network fault is voltage
Unstability failure.
Second determining module, if second failure occurs for the power grid, for determining that the electric network fault is power
Oscillation fault.
According to one embodiment of present invention, first determining module, comprising:
Setup unit, for setting the thing for terminating power grid where the Fisrt fault in the first time at the first time
Part.
First detection unit, judges whether Voltage Instability failure described in the power grid is eliminated, if the network voltage loses
Steady Failure elimination determines that the network voltage cause of destabilization is the dynamic reactive power deficiency where the power grid.
Second detection unit determines the electric network fault for generator rotor angle, electricity if the network voltage unstability failure is not eliminated
Aliasing failure is pressed, generator rotor angle is searched and flies out unit, set for the second time, the setting guilty culprit grid line in second time
The non-shorting tripping in road, and cut off unit.
According to one embodiment of present invention, first determining module, further includes:
Third detection unit judges whether the network voltage unstability failure is eliminated for continuing, if the power grid is electric
Unstability Failure elimination is pressed, determines that the network voltage cause of destabilization is that the excision of the power grid excitation system causes.
4th detection unit determines that the network voltage unstability is former if the network voltage unstability failure is not eliminated also
Because of power-angle oscillation.
According to one embodiment of present invention, second determining module, comprising:
First computing unit, for calculating the centre coordinate of the power grid power-angle oscillation, calculating the network voltage unstability
Coordinate.
Second computing unit analyzes the centre coordinate to each bus voltage amplitude fluctuation situation in power missing area, root
Electrical distance coordinate of the busbar voltage apart from the oscillation center coordinate is determined according to the voltage magnitude stability bandwidth of the bus.
Third computing unit, electrical distance coordinate according to the busbar voltage apart from the power grid oscillation center coordinate,
The network voltage unstability coordinate calculates the power grid and generator rotor angle failure probability occurs.
According to one embodiment of present invention, the Fisrt fault is short circuit broken string tripping fault, and second failure is
The direct miss fault of power.
The present invention is by from different fault types, analyzing and distinguishing the inducement before unstability, in traditional aliasing machine
It manages on analysis means, failure process and blocking factor is disassembled, and then carry out dimension deployment analysis on fault cause, form
The chain of evidence of power grid generator rotor angle and collapse of voltage aliasing type problem.With practical well, reliable analysis is for existing in power grid
Voltage Instability, generator rotor angle failure aliasing failure the problem of.
Detailed description of the invention
By reference to the following drawings, exemplary embodiments of the present invention can be more fully understood by:
Fig. 1 is disclosed based on generator rotor angle, the simulation recognition method of the electric network fault of voltage aliasing according to embodiments of the present invention
Flow chart；
Fig. 2 (a) be according to embodiments of the present invention disclosed generator's power and angle and generating set diverse access point (electrically away from
From) between graph of relation；
Fig. 2 (b) be the time point that disclosed generator's power and angle is more than 180 degree according to embodiments of the present invention and generating set not
Graph of relation between same access point (electrical distance)；
Fig. 2 (c) is electricity of the disclosed 220kV L1 node busbar voltage according to embodiments of the present invention in G1 diverse access point
Press oscillating curve figure；
Fig. 2 (d) is the graph of relation between disclosed G1Pm/Pe and angular speed according to embodiments of the present invention；
Fig. 2 (e) is disclosed 220kV L1 node load motor dynamic variable transient state curve according to embodiments of the present invention；
Fig. 2 (f) is the comparative graph of disclosed critical state and original position excitation curve according to embodiments of the present invention；
Fig. 2 (g) is disclosed generator's power and angle transient state 220 kilovolts of L1 voltage transient curves of curve according to embodiments of the present invention
Figure；
Fig. 3 is disclosed based on generator rotor angle, the simulation recognition system of the electric network fault of voltage aliasing according to embodiments of the present invention
Block diagram.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein can in addition to illustrating herein or
Sequence other than those of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that cover
Cover it is non-exclusive include, for example, the process, method, system, product or equipment for containing a series of steps or units are not necessarily limited to
Step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, product
Or other step or units that equipment is intrinsic.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, right combined with specific embodiments below
The present invention is described in further detail.
The present invention is based on the voltage stabilization of failure and angle stability aliasing mechanism simulation recognition method, i.e. generation generator rotor angle is steady
It is different from the type being arranged by failure card when the mutual aliasing of fixed, voltage stabilization, so the inducement before differentiation unstability, In
In traditional aliasing Analysis on Mechanism means, failure process and blocking factor are disassembled, and then carry out dimension exhibition on fault cause
Open analysis.
The chain of evidence of generator rotor angle and collapse of voltage aliasing type problem is preliminarily formed.Give certain preliminary analysis.Mainly
It is related to the equal many kinds of parameters of part throttle characteristics and automatic control system.That is, having larger relevance with specific grid structure.Its
In, small sending has certain typicalness.
Analysis is compared to existing control strategy and programme, gives feasible solution.It indicates
Using machine strategy is cut, the case where deteriorating collapse of voltage may result in.
The analysis method for being used to form angle stability and voltage stabilization aliasing type problem in power grid of the invention, when generation function
Angle is stable, voltage stabilization mutual aliasing when, start with from two dimensions and analyzed, first aspect is started with from angle stability, unit
The determinant of power-angle stability is the electrical distance of unit and major network, and using the method that electrical distance is gradually shortened, exploration is sought
Look for the critical electricity electrical system access node that unstability does not occur；The principal element of second aspect voltage stabilization for induction conductivity institute's accounting
Example, directly adjustment motor/constant-impedance load proportion, are gradually reduced motor accounting, sound out searching and unstability does not occur
Critical accounting, determines Voltage-stabilizing Problems.
Aiming at the problem that aliasing presentation, if it is single because generator rotor angle unstability causes, then by shortening leading unit
It can be mitigated with the method for major network electrical distance；If it is single the problem of causing because of voltage stabilization, then by adjusting and reducing area
Induction conductivity accounting in domain can be mitigated；If it is the two interaction deterioration type problem, then it can also pass through above-mentioned two
Kind analysis path is analyzed, and determines the mechanism origin cause of formation deteriorated.Therefore the present invention carries out trial analysis by two kinds of paths first,
Then comprehensive analysis is carried out.
Above two method, which calculates the complexity in analysis in industry, can be summarized as two aspects: first, existing rack passes through
The development for crossing recent decades, has reached certain scale, basic forming, and quantitative analysis parametric for electrical distance etc. exists tired
Difficulty, the present invention are used in given unit active power, pass through generating set and master before Load flow calculation and temporary steady failure
The generator rotor angle difference of net reference unit carries out electrical distance measurement.Second, load access quantity and corresponding model parameter are relative to hair
Motor belongs to mass data, and analysis difficulty is larger one by one, and under current analysis condition, the present invention uses adjustment in batches induced electricity
The mode of motivation accounting is analyzed.
Fig. 1 is the simulation recognition based on generator rotor angle, the electric network fault of voltage aliasing disclosed in first aspect present invention embodiment
Method 100, comprising:
S1: carrying out fault scanning to the power grid, determines that the generator rotor angle, Voltage Instability aliasing failure occur for the power grid.
S2: judge whether the power grid occurs Fisrt fault or whether the power grid occurs the second failure.
S21: if the Fisrt fault occurs for the power grid, determine that the electric network fault is Voltage Instability failure.
S22: if second failure occurs for the power grid, determine that the electric network fault is oscillation of power failure.
According to one embodiment of present invention, the determination electric network fault is Voltage Instability failure, comprising:
S31: setting at the first time, terminates the event of power grid where the Fisrt fault in the first time.
S31: judging whether Voltage Instability failure described in the power grid is eliminated, if the network voltage unstability failure disappears
It removes, determines that the network voltage cause of destabilization is the dynamic reactive power deficiency where the power grid.
S32: if the network voltage unstability failure is not eliminated, determine the electric network fault for generator rotor angle, the event of voltage aliasing
Barrier searches generator rotor angle and flies out unit, sets for the second time, the setting guilty culprit power network line is non-shorting in second time
Tripping, and cut off unit.
According to one embodiment of present invention, the determination electric network fault is Voltage Instability failure, further includes:
S41: continuing to judge whether the network voltage unstability failure is eliminated, if the network voltage unstability failure disappears
It removes, determines that the network voltage cause of destabilization is that the excision of the power grid excitation system causes.
S44: if the network voltage unstability failure is not eliminated also, determine the network voltage cause of destabilization for generator rotor angle vibration
It swings.
According to one embodiment of present invention, the determination electric network fault is oscillation of power failure, comprising:
S51: it calculates the centre coordinate of the power grid power-angle oscillation, calculate the network voltage unstability coordinate.
S52: the centre coordinate is analyzed to each bus voltage amplitude fluctuation situation in power missing area, according to the bus
Voltage magnitude stability bandwidth determine electrical distance coordinate of the busbar voltage apart from the oscillation center coordinate.
S53: electrical distance coordinate, power grid electricity according to the busbar voltage apart from the power grid oscillation center coordinate
Unstability coordinate is pressed, the power grid is calculated and generator rotor angle failure probability occurs.
According to one embodiment of present invention, the Fisrt fault is short circuit broken string tripping fault, and second failure is
The direct miss fault of power.
The stable influence in public angle is analyzed about electrical distance, is analyzed through measure analysis and qualitative electrical structure, small sending end system
Unite the unit farthest according to the electrical distance of generator rotor angle difference metric, often in Fig. 1 boundary Large-scale machine set.Therefore, for Section 1
The typical case unit G1, adjusts power plant's access point, gradually from existing operation access point gradually along the electrical distance direction with major network
Change access point, observes the changing rule of related electric amount.
The present embodiment has chosen 12 exemplary access points and gives as shown in Fig. 2 (a) and modify G1 one by one along electrical path
In the case of access point, the relationship of electrical distance and generator rotor angle difference between access point and major network, it can be seen that gradually with access point
It is mobile to major network, generator rotor angle unstability can be gradually eliminated.
Fig. 2 (b) is corresponding with Fig. 2 (a), and wherein horizontal axis is opposite electrical distance axis, and access point number corresponding to horizontal axis is got over
Greatly, electrical distance of the access point apart from major network is remoter, and the longitudinal axis is greater than 180 relative to major network reference unit generator rotor angle difference for generating set
At the time of degree occurs." moment occurs " can show the speed of unit Transient Instability to a certain extent.By Fig. 2 (b) as it can be seen that with
The shortening of unit electrical distance, the unit given for one cut off transient state mistake in given three phase short circuit fault-protection act
The delay time of " moment occurs " during journey is gradually increased, until unstability does not occur.
About the analysis of voltage characteristic, shown in voltage oscillation curve corresponding with the variation of generator rotor angle difference such as Fig. 2 (c).
Fig. 2 (c) has chosen the voltage transient curve of typical 220kV load point L1.By can be seen that two spies in Fig. 2 (c)
Sign, first, no matter change the access point of G1,0.24 second (absolute event 1.24 seconds) voltage has inflection point, inflection point always after failure
Moment relative stability does not change with the change of G1 access point, can tentatively judge, Henan western collapse of voltage moment and G1 with
Weak correlativity is presented in the electrical distance of major network, and shows always 1.24-1.75 seconds.Second, 1.24 seconds to 1.75 seconds or so,
It is the period that System Reactive Power uptake is maximum and ramps up.This paper case mini system voltage transient curve and typical load point
L1 is similar.
It is as follows about typical generator electromagnetism-machine torque analysis:
Three curves of Fig. 2 (d) are respectively G1 electromagnetic power Pe, mechanical output Pm and corresponding rotor velocity ω.By
Fig. 2 (d) is as can be seen that G1 deceleration time section is only 0.3 second between 1.25 seconds to 1.55 seconds.
Specificity analysis between typical motor and generator, as follows:
By 1.25 seconds to 1.55 seconds it can be seen from Fig. 2 (e), due to generator side and load side inertia time constant
The coupled problem of setting, load is after short trouble route cuts off moment (the broken string excision of 1.1 second moment) relative to the excision moment
The period for foring an active power and reactive power in preceding dynamic process while absorbing.In terms of active, 1.25 seconds
The acceleration increased period to 1.55 seconds load active power demands matches with generator deceleration interval, and then is degrading power generation
The braking process of machine rotor, rotor velocity ω oscillating-type continues to increase, and then G1 generator rotor angle is caused to fly out.In terms of idle,
1.25 seconds to 1.55 seconds reactive load demands moment impact first to being more than 1.3 times or so of reactive requirement before failure, after gradually
Decline, this period voltage are consistently lower than steady-state value, and induction conductivity electromagnetic torque is caused to decline with voltage squared value, voltage decline
Also occur in the same period.
Physical interpretation: load is under Equilibrium effect, after short trouble is eliminated, there are the convalescence of 1-2s, this
In convalescence, if simultaneously to system absorb active and idle (relative to the short-circuit period), system can not provide it is enough active,
It will lead to generator rotor angle to fly out；Enough dynamic reactives (excitation system corresponding speed and corresponding amount) can not be such as provided, then lead to voltage
Collapse.
In addition, in the case of can be seen that current parameter configuration such as the characteristic of Fig. 2 (f) electrical distance critical state, load
Idle demand characteristics can be up to 3-4 seconds slow fluctuation rise periods by one after a failure, that is, even if disappearing in angle stability
Under critical condition after removing, the risk of collapse of voltage is still remained.
Split-phase motor accounting changes the problem of voltage stability below.
After the adjustment of certain mini system difference induction conductivity ratio, as induction conductivity accounting is gradually reduced, certain is small
System voltage oscillation mean value is gradually improved, and critical value is about induction conductivity accounting 32%, is sent out when by all mini systems
Motor is all changed to 100% constant-impedance, and there is no collapse of voltages.This kind of method may be more mature in opposite rack feelings
Under condition, accomplish certain accuracy.
Generator rotor angle and voltage aliasing stability problem for case described in the present embodiment, by constantly reducing main force's unit
Electrical distance between transient state after-potential Eq ' and major network can gradually eliminate generator rotor angle unstability and Voltage Instability.
Fig. 2 (g) shows the active power and reactive power transient state absorbing state of certain mini system cluster load totality.
Certain mini system load totality reactive power moment after failure removal reaches 241Mvar it can be seen from Fig. 2 (g),
1.67 times of (144.3Mvar) when being failure presteady state, this high demand is held time (shook more than 4 seconds from the power of the assembling unit
Swing and see, straightened more than 1,2 or 3 occur asynchronous oscillation), and generator rotor angle the 1st be rocked to the 4th pendulum after fluctuation lasting increasing
Greatly；During third is put, with the recovery of voltage, the active power demand of load is gradually recovered the quick increasing with reactive power demand
Long, angle stability has a sign of recovery, but because the active demand of load at this time accelerates recovery again, so that deterioration generates electricity again
Machine rotor braking process, ultimately forms asynchronous oscillation, and generator rotor angle flies out.Collapse of voltage is with the characteristic remarkable after third pendulum.
Firstly, in existing access system mode, parameters adjusting, when the mini system that catastrophe failure occurs and generates
When cluster generator rotor angle unstability and the aliasing type problem of mini system voltage cluster crash, the two unstability shows as not influenced by angle stability
, the reciprocal effect relationship for being set to Voltage Instability guide, that is, it is fixed to have shown Voltage Instability before generator rotor angle unstability, then
The deterioration type reciprocal effect that generator rotor angle unstability is fixed and Voltage Instability is fixed has occurred.
Secondly, being cut off up to the bilateral excision moment into recovery process thereafter in fault moment to unilateral side, 0.5 second time
(absolute time -1.5 seconds 1 second) is the small sending stable critical period within section, due to Failure elimination process and subsequent 1
In second, voltage can saltant type rises, first thereafter with generator rotor angle swing puts in time (steady state stability limit for reaching unit), bears
Lotus is to system while active and idle absorbing to system, and according to current parameter configuration, the idle amount maximum value absorbed
It has been more than the idle of failure forward direction system absorption.It is to directly result in voltage at this time if system can not provide enough idle
Collapse.
Fig. 3 is the simulation recognition based on generator rotor angle, the electric network fault of voltage aliasing that second aspect of the present invention embodiment proposes
System 300, comprising:
Determining module 301 determines that the generator rotor angle, voltage occur for the power grid for carrying out fault scanning to the power grid
Unstability aliasing failure.
Judgment module 303, for judging whether the power grid occurs Fisrt fault or whether the power grid occurs second
Failure.
First determining module 305, if the Fisrt fault occurs for the power grid, for determining the electric network fault for electricity
Press unstability failure.
Second determining module 307, if second failure occurs for the power grid, for determining that the electric network fault is function
Rate oscillation fault.
According to one embodiment of present invention, first determining module, comprising:
Setup unit, for setting the thing for terminating power grid where the Fisrt fault in the first time at the first time
Part.
First detection unit, judges whether Voltage Instability failure described in the power grid is eliminated, if the network voltage loses
Steady Failure elimination determines that the network voltage cause of destabilization is the dynamic reactive power deficiency where the power grid.
Second detection unit determines the electric network fault for generator rotor angle, electricity if the network voltage unstability failure is not eliminated
Aliasing failure is pressed, generator rotor angle is searched and flies out unit, set for the second time, the setting guilty culprit grid line in second time
The non-shorting tripping in road, and cut off unit.
According to one embodiment of present invention, first determining module, further includes:
Third detection unit judges whether the network voltage unstability failure is eliminated for continuing, if the power grid is electric
Unstability Failure elimination is pressed, determines that the network voltage cause of destabilization is that the excision of the power grid excitation system causes.
4th detection unit determines that the network voltage unstability is former if the network voltage unstability failure is not eliminated also
Because of power-angle oscillation.
According to one embodiment of present invention, second determining module, comprising:
First computing unit, for calculating the centre coordinate of the power grid power-angle oscillation, calculating the network voltage unstability
Coordinate.
Second computing unit analyzes the centre coordinate to each bus voltage amplitude fluctuation situation in power missing area, root
Electrical distance coordinate of the busbar voltage apart from the oscillation center coordinate is determined according to the voltage magnitude stability bandwidth of the bus.
Third computing unit, electrical distance coordinate according to the busbar voltage apart from the power grid oscillation center coordinate,
The network voltage unstability coordinate calculates the power grid and generator rotor angle failure probability occurs.
According to one embodiment of present invention, the Fisrt fault is short circuit broken string tripping fault, and second failure is
The direct miss fault of power.
Above-mentioned the embodiment of the present application serial number is for illustration only, does not represent the advantages or disadvantages of the embodiments.
In above-described embodiment of the application, all emphasizes particularly on different fields to the description of each embodiment, do not have in some embodiment
The part of detailed description, reference can be made to the related descriptions of other embodiments.
In several embodiments provided herein, it should be understood that disclosed technology contents can pass through others
Mode is realized.Wherein, the apparatus embodiments described above are merely exemplary, such as the division of the unit or module,
Only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or module or group
Part can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown
Or the mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, module or unit it is indirect
Coupling or communication connection can be electrical or other forms.
The unit as illustrated by the separation member or module may or may not be physically separated, as
The component that unit or module are shown may or may not be physical unit or module, it can and it is in one place, or
Person may be distributed in multiple network units or module.Some or all of list therein can be selected according to the actual needs
Member or module achieve the purpose of the solution of this embodiment.
In addition, each functional unit or module in each embodiment of the application can integrate in a processing unit or mould
In block, it is also possible to each unit or module physically exists alone, can also be integrated in two or more units or module
In one unit or module.Above-mentioned integrated unit or module both can take the form of hardware realization, can also use software
The form of functional unit or module is realized.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, the technical solution of the application is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can for personal computer, server or network equipment etc.) execute each embodiment the method for the application whole or
Part steps.And storage medium above-mentioned includes: that USB flash disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), mobile hard disk, magnetic or disk etc. be various to can store program code
Medium.
The above is only the preferred embodiment of the application, it is noted that for the ordinary skill people of the art
For member, under the premise of not departing from the application principle, several improvements and modifications can also be made, these improvements and modifications are also answered
It is considered as the protection scope of the application.
Claims (10)
1. based on generator rotor angle, the simulation recognition method of the electric network fault of voltage aliasing, which is characterized in that the simulation recognition method,
Include:
S1: carrying out fault scanning to the power grid, determines that the generator rotor angle, Voltage Instability aliasing failure occur for the power grid；
S2: judge whether the power grid occurs Fisrt fault or whether the power grid occurs the second failure；
S21: if the Fisrt fault occurs for the power grid, determine that the electric network fault is Voltage Instability failure；
S22: if second failure occurs for the power grid, determine that the electric network fault is oscillation of power failure.
2. the method according to claim 1, wherein the determination electric network fault be Voltage Instability failure,
Include:
S31: setting at the first time, terminates the event of power grid where the Fisrt fault in the first time；
S31: judging whether Voltage Instability failure described in the power grid is eliminated, if the network voltage unstability Failure elimination, sentences
The fixed network voltage cause of destabilization is that the dynamic reactive power where the power grid is insufficient；
S32: if the network voltage unstability failure is not eliminated, determine that the electric network fault for generator rotor angle, voltage aliasing failure, is looked into
It looks for generator rotor angle to fly out unit, set for the second time, the setting non-shorting tripping of guilty culprit power network line in second time,
And cut off unit.
3. according to the method described in claim 2, it is characterized in that, the determination electric network fault be Voltage Instability failure,
Further include:
S41: continuing to judge whether the network voltage unstability failure is eliminated, if the network voltage unstability Failure elimination, sentences
The fixed network voltage cause of destabilization is that the excision of the power grid excitation system causes；
S44: if the network voltage unstability failure is not eliminated also, determine that the network voltage cause of destabilization is power-angle oscillation.
4. the method according to claim 1, wherein the determination electric network fault be oscillation of power failure,
Include:
S51: it calculates the centre coordinate of the power grid power-angle oscillation, calculate the network voltage unstability coordinate；
S52: the centre coordinate is analyzed to each bus voltage amplitude fluctuation situation in power missing area, according to the electricity of the bus
Pressure amplitude value stability bandwidth determines electrical distance coordinate of the busbar voltage apart from the oscillation center coordinate；
S53: electrical distance coordinate, the network voltage according to the busbar voltage apart from the power grid oscillation center coordinate lose
Mark is occupied stably, the power grid is calculated and generator rotor angle failure probability occurs.
5. the method according to claim 1, wherein the Fisrt fault be short circuit broken string tripping fault, it is described
Second failure is the direct miss fault of power.
6. based on generator rotor angle, the simulation recognition system of the electric network fault of voltage aliasing, which is characterized in that the system comprises:
Determining module determines that the generator rotor angle, Voltage Instability aliasing occur for the power grid for carrying out fault scanning to the power grid
Failure；
Judgment module, for judging whether the power grid occurs Fisrt fault or whether the power grid occurs the second failure；
First determining module, if the Fisrt fault occurs for the power grid, for determining that the electric network fault is Voltage Instability
Failure；
Second determining module, if second failure occurs for the power grid, for determining that the electric network fault is oscillation of power
Failure.
7. system according to claim 6, which is characterized in that first determining module, comprising:
Setup unit, for setting the event for terminating power grid where the Fisrt fault in the first time at the first time；
First detection unit, judges whether Voltage Instability failure described in the power grid is eliminated, if network voltage unstability event
Barrier is eliminated, and determines that the network voltage cause of destabilization is the dynamic reactive power deficiency where the power grid；
Second detection unit determines that the electric network fault is mixed for generator rotor angle, voltage if the network voltage unstability failure is not eliminated
Folded failure searches generator rotor angle and flies out unit, set for the second time, the setting guilty culprit power network line is non-in second time
Short circuit tripping, and cut off unit.
8. system according to claim 7, which is characterized in that first determining module, further includes:
Third detection unit judges whether the network voltage unstability failure is eliminated for continuing, if the network voltage loses
Steady Failure elimination determines that the network voltage cause of destabilization is that the excision of the power grid excitation system causes；
4th detection unit determines that the network voltage cause of destabilization is if the network voltage unstability failure is not eliminated also
Power-angle oscillation.
9. system according to claim 6, which is characterized in that second determining module, comprising:
First computing unit, for calculating the centre coordinate of the power grid power-angle oscillation, calculating the network voltage unstability coordinate；
Second computing unit analyzes the centre coordinate to each bus voltage amplitude fluctuation situation in power missing area, according to institute
The voltage magnitude stability bandwidth for stating bus determines electrical distance coordinate of the busbar voltage apart from the oscillation center coordinate；
Third computing unit, it is electrical distance coordinate according to the busbar voltage apart from the power grid oscillation center coordinate, described
Network voltage unstability coordinate calculates the power grid and generator rotor angle failure probability occurs.
10. system according to claim 6, which is characterized in that the Fisrt fault is short circuit broken string tripping fault, described
Second failure is the direct miss fault of power.
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