CN110492489A - Power System Voltage Stability control method and device - Google Patents
Power System Voltage Stability control method and device Download PDFInfo
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- CN110492489A CN110492489A CN201910661599.6A CN201910661599A CN110492489A CN 110492489 A CN110492489 A CN 110492489A CN 201910661599 A CN201910661599 A CN 201910661599A CN 110492489 A CN110492489 A CN 110492489A
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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
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
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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
- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
The embodiment of the present invention provides a kind of Power System Voltage Stability control method and device, which comprises building has the electric power system model of virtual synchronous generator, obtains the equation group of system；It is analyzed using equation group of the bifurcation theory to system, obtains the maximum value of the reactive power of load；System loading is controlled according to the maximum value of the reactive power of load.Power System Voltage Stability control method and device provided in an embodiment of the present invention, by carrying out Bifurcation to the electric power system model with virtual synchronous generator constructed, determine the maximum value of the reactive power of load, load is limited by the maximum value of reactive power, avoiding load power is more than the maximum value, to provide foundation to determine wind power transmission limit and improving Power System Voltage Stability.
Description
Technical field
The present invention relates to distributed generation technology field more particularly to a kind of Power System Voltage Stability control method and
Device.
Background technique
The new energy such as wind energy will occupy critically important position in following energy security project, but also have simultaneously it is intermittent,
The features such as randomness, causes Wind turbines different from power supply traditional in electric system, when wind-power electricity generation occupation ratio in systems
When more important status, the stability of power grid will be had a huge impact.
Electricity can be participated in it is known that synchronous generator has larger inertia according to the synchronous generator rotor equation of motion
The adjusting of net voltage and frequency has good Ability of Resisting Disturbance, is the power supply that a kind of pair of power grid has positive influence.Virtual synchronous
Generator techniques simulate the characteristic of synchronous generator, generate positive potent influence to the safety and stability of power grid.With virtual same
The gradually popularization of generator techniques is walked, therefore, it is necessary to the access of virtual synchronous generator to the work of Network Voltage Stability
It is analyzed with principle.
In the prior art, the method for generalling use closed-loop control realizes the control of grid stability, and there are no using virtually
Synchronous generator technology is come the method that improves Power System Voltage Stability.
Summary of the invention
The embodiment of the present invention provides a kind of Power System Voltage Stability control method and device, for solving the prior art
The technical problem of middle Power System Voltage Stability difference.
In order to solve the above-mentioned technical problem, on the one hand, the embodiment of the present invention provides a kind of Power System Voltage Stability control
Method processed, comprising:
Building has the electric power system model of virtual synchronous generator, obtains the equation group of system；
It is analyzed using equation group of the bifurcation theory to system, obtains the maximum value of the reactive power of load；
System loading is controlled according to the maximum value of the reactive power of load.
Further, described to be analyzed using equation group of the bifurcation theory to system, obtain the reactive power of load
Maximum value specifically includes:
Obtain the inertia time constant and damped coefficient of multiple groups virtual synchronous generator；
The equation group of system is input to Bifurcation tool, under the conditions of obtaining different inertia time constants and damped coefficient
Balance solution manifold figure；
The maximum value of the reactive power of load is determined according to balance solution manifold figure.
Further, after the balance solution manifold figure obtained under the conditions of different inertia time constants and damped coefficient,
Further include:
Bifurcation and dynamical bifurcation are obtained from balance solution manifold figure；
Generate Bifurcation corresponding voltage aperiodic instability figure and dynamical bifurcation corresponding voltage oscillogram.
Further, after the balance solution manifold figure obtained under the conditions of different inertia time constants and damped coefficient,
Further include:
According to the balance solution manifold figure under the conditions of different inertia time constants and damped coefficient, determine inertia time constant and
Influence of the damped coefficient condition to voltage stability.
On the other hand, the embodiment of the present invention provides a kind of Power System Voltage Stability control device, comprising:
Model construction module obtains the equation of system for constructing the electric power system model for having virtual synchronous generator
Group；
Power analysis module obtains the idle function of load for analyzing using equation group of the bifurcation theory to system
The maximum value of rate；
Load control module, the maximum value for the reactive power according to load control system loading.
Further, the power analysis module includes acquiring unit, balance solution manifold figure generation unit and determination unit；
Acquiring unit, for obtaining the inertia time constant and damped coefficient of multiple groups virtual synchronous generator；
Solution manifold figure generation unit is balanced, for the equation group of system to be input to Bifurcation tool, is obtained different used
Balance solution manifold figure under the conditions of property time constant and damped coefficient；
Determination unit, the maximum value of the reactive power for determining load according to balance solution manifold figure.
It further, further include fork extraction module and voltage oscillation analog module；
Diverge extraction module, for obtaining Bifurcation and dynamical bifurcation from balance solution manifold figure；
Voltage oscillation analog module, it is corresponding for generating Bifurcation corresponding voltage aperiodic instability figure and dynamical bifurcation
Voltage oscillation figure.
It further, further include stability analysis module, for according to different inertia time constants and damped coefficient condition
Under balance solution manifold figure, determine the influence of inertia time constant and damped coefficient condition to voltage stability.
In another aspect, the embodiment of the present invention provides a kind of electronic equipment, comprising: memory, processor, and it is stored in institute
The computer program that can be run on memory and on the processor is stated, when the processor executes the computer program,
The step of realizing the above method.
Another aspect, the embodiment of the present invention provide a kind of non-transient computer readable storage medium, are stored thereon with calculating
Machine program, when the computer program is executed by processor, realize the above method the step of.
Power System Voltage Stability control method and device provided in an embodiment of the present invention, by being had to what is constructed
The electric power system model of virtual synchronous generator carries out Bifurcation, the maximum value of the reactive power of load is determined, by idle
The maximum value of power limits load, and avoiding load power is more than the maximum value, to improve the stabilization of power system voltage
Property.
Detailed description of the invention
Fig. 1 is Power System Voltage Stability control method schematic diagram provided in an embodiment of the present invention；
Fig. 2 is typical 3 node system wiring diagram provided in an embodiment of the present invention；
Fig. 3 is dynamic provided in an embodiment of the present invention, Bifurcation schematic diagram；
Fig. 4 is M=0.3, D provided in an embodiment of the present inventionpmBalance solution manifold figure when=0.05；
Fig. 5 is the time-domain-simulation schematic diagram under different capacity provided in an embodiment of the present invention；
Fig. 6 is the schematic diagram of bifurcation point under different damping coefficient provided in an embodiment of the present invention；
Fig. 7 is the time-domain-simulation schematic diagram under different damping coefficient provided in an embodiment of the present invention；
Emulation schematic diagram when Fig. 8 is M=0.05 provided in an embodiment of the present invention；
Fig. 9 is Power System Voltage Stability control device schematic diagram provided in an embodiment of the present invention；
Figure 10 is the structural schematic diagram of electronic equipment provided in an embodiment of the present invention.
Specific embodiment
In order to keep the purposes, technical schemes and advantages of the embodiment of the present invention clearer, implement below in conjunction with the present invention
Attached drawing in example, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment
It is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiment of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Fig. 1 is Power System Voltage Stability control method schematic diagram provided in an embodiment of the present invention, as shown in Figure 1, this
Inventive embodiments provide a kind of Power System Voltage Stability control method, and executing subject is Power System Voltage Stability control
Device processed, this method comprises:
Step S101, building has the electric power system model of virtual synchronous generator, obtains the equation group of system.
Specifically, Fig. 2 is typical 3 node system wiring diagram provided in an embodiment of the present invention, firstly, building is with virtual
The electric power system model of synchronous generator VSG obtains the equation group of system, and the equation group of system is as follows:
Wherein, θmIndicate the generator rotor angle of VSG,Indicate that the derivative of the generator rotor angle of VSG, ω indicate the electrical angular speed of VSG,
For the derivative of the electrical angular speed of VSG, M indicates the inertia time constant of VSG, TmIndicate the machine torque of VSG, EmFor the electronic of VSG
Gesture, u2For the voltage magnitude of load bus,For the derivative of the voltage magnitude of load bus, the phase angle of θ load bus voltage, ym
For the line admittance amplitude of the side VSG, αmFor a part of VSG side line road admittance phase angle, DpmIndicate the damped coefficient of VSG, QlFor
Total reactive power at load bus, PlFor total active power at load bus, P0For the permanent wattful power of equivalent induction-motor load
Rate part, Q0For the permanent reactance capacity of equivalent induction-motor load, P1For the static invariable power burden with power at load bus,
Q1For the static invariable power load or burden without work at load bus, Kpw、Kpu、Kqw、Kqu、Kqu2It is system load characteristic coefficient.
Step S102, it is analyzed using equation group of the bifurcation theory to system, obtains the maximum of the reactive power of load
Value.
Specifically, Fig. 3 be dynamic provided in an embodiment of the present invention, Bifurcation schematic diagram, as shown in Figure 3, wherein figure
(a) is dynamical bifurcation in 3, and (b) is Bifurcation in Fig. 3.
The equivalent model of virtual synchronous generator can be indicated with following formula:
Wherein,Indicate that the derivative of the generator rotor angle of VSG, ω indicate the electrical angular speed of VSG,Indicate the electrical angle speed of VSG
The derivative of degree, DpFor automatic virtual blocks coefficient, J is the rotary inertia of VSG, ω*For a reference value of electrical angular speed, p*For the machine of VSG
Tool power, p are VSG electromagnetic power.Due to DpPresence so that inverter type generates electricity by way of merging two or more grid systems, there is also damping power grid function for device
The ability of rate oscillation；Due to the presence of J, so that gird-connected inverter is provided with inertia in power and dynamic process of frequency, this two
A variable is of great significance to the improvement of operation of power networks performance.
Using offer reference voltage in virtual synchronous generator modelStandard current transformer control structure, modulated signal
M determines that floating voltage refers to the controller (with reference angle θ rotation) in dq reference axis by cascading PI controllerVoltage misses
DifferenceFor calculating the reference current of voltage source converter node, reference current is formulated as follows:
Wherein,For the reference value of electric current,For the reference value of current vector d axis,For the reference of current vector q axis
Value, xv=[xvd xvq]TFor integrating state variable, xvdFor d axis integrating state variable, xvqFor q axis integrating state variable,For product
The derivative of isloation state variable, v=[vd vq]TFor voltage measuring value, vdFor d shaft-voltage measurement value, vqFor q shaft-voltage measurement value,For voltage reference value,For d shaft voltage reference value, i=[id iq]TFor electric current output variable, idFor d axis electricity
Flow output variable, iqFor q shaft current output variable, C is filter capacitor, and ω indicates the electrical angular speed of VSG,
It is the spin matrix that angle is pi/2, Kpv=kpvI2、Kiv=kivI2For the gain of PI controller, I2For two-dimentional unit matrix.With
Afterwards, a PI controller is for tracking
Wherein, xi=[xid xiq]TFor integrating state variable,For the derivative of integrating state variable, xidShape is integrated for d axis
State variable, xiqFor q axis integrating state variable,For the reference value of current vector, is=[isd isq]TFor current measurement value, isdFor
D shaft current measured value, isqFor q shaft current measured value,For the reference value of voltage, v is voltage measuring value, and L is filter inductance,
ω indicates the electrical angular speed of VSG,It is the spin matrix that angle is pi/2, R is filter resistance, I2For two dimension
Unit matrix, Kpi=kpiI2、Kii=kiiI2For the gain of PI controller.Finally, three-phase modulations signal
The model of load is formulated as follows:
Wherein: PlFor the total active power of load, QlFor the total reactive power of load, P0It is active for the perseverance of equivalent induction-motor load
Power section, Q0For the permanent reactance capacity of equivalent induction-motor load, P1It is negative for the permanent active power of static state at load bus
Lotus, Q1For the permanent reactive power load of static state at load bus, Kpw、Kpu、T、Kqw、Kqu、Kqu2It is system load characteristic coefficient,
u2, θ be respectively voltage at load grid node amplitude and angle,The amplitude of voltage respectively at load grid node
With the derivative of angle.
After obtaining the equation group of system, is analyzed using equation group of the bifurcation theory to system, load can be obtained
The maximum value of reactive power.
Step S103, system loading is controlled according to the maximum value of the reactive power of load.
Specifically, the maximum value of the reactive power of load is the maximum value for the load power that electric system can carry,
When the power of load is not above the maximum value, the disturbance of load will not affect that the stability of electric system, when load
When power is more than the maximum value, the voltage that the lasting increase of load will lead to electric system is fluctuated.
Therefore, system loading is controlled according to the maximum value of the reactive power of load, is maintained at the power of load
In the range of the maximum value, the stabilization of the voltage of electric system can be kept.
Power System Voltage Stability control method provided in an embodiment of the present invention, by being had virtually together to what is constructed
The electric power system model for walking generator carries out Bifurcation, determines the maximum value of the reactive power of load, passes through reactive power
Maximum value limits load, and avoiding load power is more than the maximum value, thus for raising Power System Voltage Stability provide according to
According to.
It is further, described to be analyzed using equation group of the bifurcation theory to system based on any of the above-described embodiment, it obtains
The maximum value for taking the reactive power of load, specifically includes:
Obtain the inertia time constant and damped coefficient of multiple groups virtual synchronous generator；
The equation group of system is input to Bifurcation tool, under the conditions of obtaining different inertia time constants and damped coefficient
Balance solution manifold figure；
The maximum value of the reactive power of load is determined according to balance solution manifold figure.
Specifically, the inertia time constant of virtual synchronous generator is a function related with virtual rotation inertia J,
Its selection is more flexible, can get the smaller or larger value range that conventional synchronization generator is unable to reach, can also fill up biography
The inertia time constant that system synchronous generator can not cover, keeps the regulating time scale of power grid more various.3 node system parameters
Value is as shown in table 1, and model and parameter value in summary carry out Bifurcation to it.
13 node system parameter of table
The equation group of system is input to point by the inertia time constant and damped coefficient for obtaining multiple groups virtual synchronous generator
Trouble analysis tool, obtains the balance solution manifold figure under the conditions of different inertia time constants and damped coefficient, according to balance solution manifold
Scheme the maximum value of the reactive power of determining load.
Fig. 4 is M=0.3, D provided in an embodiment of the present inventionpmBalance solution manifold figure when=0.05, firstly, with M=0.3,
DpmFor=0.05, the balance solution manifold of research voltage stability is drawn using Bifurcation tool, as control parameter Q1Continuously
When variation, meet the u of differential equation group equalization point condition2Variation tendency in the plane is as shown in Figure 4.
In the process, control parameter Q is chosen1Change since 10.82, then can detecte altogether to three bifurcation points
In the presence of respectively two Hopf bifurcation points and a saddle-node bifurcation point, parameter value is as shown in table 2 at bifurcation point.
Table 2 M=0.3, DpmBifurcation point value when=0.05
According to the corresponding Q of bifurcation point1Value, that is, can determine the maximum value of the reactive power of load.
Power System Voltage Stability control method provided in an embodiment of the present invention, by being had virtually together to what is constructed
The electric power system model for walking generator carries out Bifurcation, determines the maximum value of the reactive power of load, passes through reactive power
Maximum value limits load, and avoiding load power is more than the maximum value, to improve the stability of power system voltage.
Based on any of the above-described embodiment, further, it is described obtain different inertia time constants and damped coefficient under the conditions of
Balance solution manifold figure after, further includes:
Bifurcation and dynamical bifurcation are obtained from balance solution manifold figure；
Generate Bifurcation corresponding voltage aperiodic instability figure and dynamical bifurcation corresponding voltage oscillogram.
Specifically, after obtaining the balance solution manifold figure under the conditions of different inertia time constants and damped coefficient, only with
Balance solution manifold is difficult to judge the type of dynamic Hopf bifurcation point, it is also necessary in terms of further carrying out time domain in fork software
Analysis.
Fig. 5 be different capacity provided in an embodiment of the present invention under time-domain-simulation schematic diagram, Fig. 5 be from initial launch point to
First Hopf bifurcation point chooses original state Q1=10.82, Q1=11.2 and Q1=11.411 time-domain simulation results.
It can be obtained before first Hopf bifurcation point by Fig. 5, if the reactive power of load continues to increase, load bus electricity
Convergent oscillation will occur for pressure, finally tend towards stability；Between two Hopf bifurcation points, if the reactive power of load continues to increase,
Then increasing oscillation will occur for load bus voltage, approximately pass through 75 seconds voltage per unit values and be reduced to 0.8, eventually lead to collapse of voltage；
Near static saddle-node bifurcation point, if the reactive power of load continues to increase, aperiodic instability will occur for load bus voltage, greatly
About collapse of voltage is eventually led to 0 by 1.2 seconds load bus Voltage Drops.
In conclusion dynamic Hopf fork generation earlier than static saddle, i.e., cannot be with Q1=11.411448 conducts
The maximum value of reactive load power, and should be with Q1=10.980231 be maximum value, when reactive load power be more than this value and by
To when disturbance, load bus voltage value will finally collapse.
Power System Voltage Stability control method provided in an embodiment of the present invention, by being had virtually together to what is constructed
The electric power system model for walking generator carries out Bifurcation, determines the maximum value of the reactive power of load, passes through reactive power
Maximum value limits load, and avoiding load power is more than the maximum value, to improve the stability of power system voltage.
Based on any of the above-described embodiment, further, it is described obtain different inertia time constants and damped coefficient under the conditions of
Balance solution manifold figure after, further includes:
According to the balance solution manifold figure under the conditions of different inertia time constants and damped coefficient, determine inertia time constant and
Influence of the damped coefficient condition to voltage stability.
Specifically, in order to determine the influence of inertia time constant and damped coefficient condition to voltage stability.It obtains not
After the balance solution manifold figure under the conditions of inertia time constant and damped coefficient, it is also necessary to according to different inertia time constants and
Time-domain analysis figure under the conditions of damped coefficient determines the influence of inertia time constant and damped coefficient condition to voltage stability.
Fig. 6 is the schematic diagram of bifurcation point under different damping coefficient provided in an embodiment of the present invention, as shown in fig. 6, with Q1=
10.82 be initial operating condition, works as DpmWhen=0.025, the presence of two bifurcation points, respectively Hopf bifurcation point can be detected
And saddle node bifurcation point；Work as DpmWhen=0.075, can detect the presence of two bifurcation points, respectively Hopf bifurcation point with
And saddle-node bifurcation point；Work as DpmWhen=0.125, it is only able to detect the presence of a bifurcation point, i.e. saddle-node bifurcation point.
Fig. 7 is the time-domain-simulation schematic diagram under different damping coefficient provided in an embodiment of the present invention, equally with Q1=10.82
For initial operating condition, work as DpmWhen=0.025, increasing oscillation will occur for voltage at load bus and eventually lead to voltage to collapse
It bursts, is precritical Hopf bifurcation point, is unstable；Work as DpmWhen=0.075, amount of decrease vibration will occur for the voltage at load bus
It swings and finally stablizes, be postcritical Hopf bifurcation point, be stable；Work as DpmWhen=0.125, the voltage at load bus will more
It tends towards stability fastly.
Bifurcation point value when 3 damped coefficient change of table
| Q/pu | Supercritical Hopf bifurcation point | Subcritical Hopf bifurcation point | Saddle-node bifurcation point |
| Dpm=0.025 | Without practical significance | 11.407954 | 11.411448 |
| Dpm=0.05 | 10.980231 | 11.406244 | 11.411448 |
| Dpm=0.075 | 11.232933 | It is not present | 11.411448 |
| Dpm=0.125 | It is not present | It is not present | 11.411448 |
It can be obtained by table 3 and Fig. 7, when damped coefficient reduces, the attainable maximum value of the load or burden without work of system is also corresponding
It reduces, and the crest value vibrated before collapse of voltage is bigger.When damped coefficient is increased sufficiently to more, system there would not be dynamic point
Trouble point, only exists quiet bifurcation point, this illustrates that the raising of damped coefficient facilitates voltage stability, therefore, as long as virtual synchronous machine
There are enough damped coefficients, so that it may which simulation even surmounts the positive influence that synchronous machine provides power grid.
For traditional synchronous generator, the M of virtual synchronous machine can be much smaller.Fig. 8 mentions for the embodiment of the present invention
Emulation schematic diagram when the M=0.05 of confession, (a) is to choose M=0.05 in Fig. 8, and obtained load bus voltage is with reactive load
The balance solution manifold figure of power consecutive variations, wherein the value of bifurcation point parameter is as shown in bifurcation point value quiet in table 2.Work as continuation
With Q1=10.82 when being initial operating condition, and the voltage at load bus will keep voltage stabilization under disturbance, and time-domain analysis is such as
Shown in (b) in Fig. 8.
As can be seen from Figure 8, when unit set inertia time constant M reduces, balance solution manifold there would not be Hopf points
Trouble point, and the value of quiet bifurcation point remains unchanged, i.e. the lesser characteristic of virtual synchronous machine inertia time constant is beneficial to voltage
Stability, the load or burden without work value for undertaking system is bigger, is conducive to the safe and stable operation of system.
Therefore, the saddle knot in Hopf bifurcation point and Bifurcation point when studying Voltage-stabilizing Problems, in dynamical bifurcation
Trouble point no less important；When virtual synchronous machine accesses power grid, the characteristic of synchronous generator can be largely simulated, i.e., virtually
The raising of synchronous machine damped coefficient, the reduction of inertia time constant are conducive to voltage stabilization.
Power System Voltage Stability control method provided in an embodiment of the present invention, by being had virtually together to what is constructed
The electric power system model for walking generator carries out Bifurcation, determines the maximum value of the reactive power of load, passes through reactive power
Maximum value limits load, and avoiding load power is more than the maximum value, to improve the stability of power system voltage.
Based on any of the above-described embodiment, Fig. 9 is Power System Voltage Stability control device provided in an embodiment of the present invention
Schematic diagram, as shown in figure 9, the embodiment of the present invention provides a kind of Power System Voltage Stability control device, including model construction
Module 901, power analysis module 902 and load control module 903, in which:
Model construction module 901 is used to construct the electric power system model with virtual synchronous generator, obtains the side of system
Journey group；Power analysis module 902 obtains the reactive power of load for analyzing using equation group of the bifurcation theory to system
Maximum value；Load control module 903 is used to control system loading according to the maximum value of the reactive power of load.
Based on any of the above-described embodiment, further, the power analysis module includes acquiring unit, balance solution manifold figure
Generation unit and determination unit；
Acquiring unit, for obtaining the inertia time constant and damped coefficient of multiple groups virtual synchronous generator；
Solution manifold figure generation unit is balanced, for the equation group of system to be input to Bifurcation tool, is obtained different used
Balance solution manifold figure under the conditions of property time constant and damped coefficient；
Determination unit, the maximum value of the reactive power for determining load according to balance solution manifold figure.
It further include fork extraction module and voltage oscillation analog module further based on any of the above-described embodiment；
Diverge extraction module, for obtaining Bifurcation and dynamical bifurcation from balance solution manifold figure；
Voltage oscillation analog module, it is corresponding for generating Bifurcation corresponding voltage aperiodic instability figure and dynamical bifurcation
Voltage oscillation figure.
It further include stability analysis module further based on any of the above-described embodiment, for according to different inertia times
Balance solution manifold figure under the conditions of constant and damped coefficient determines inertia time constant and damped coefficient condition to voltage stability
Influence.
The embodiment of the present invention provides a kind of Power System Voltage Stability control device, for executing any of the above-described embodiment
Described in method, the device provided through this embodiment execute the specific steps of above-mentioned a certain method as described in the examples with
Above-mentioned corresponding embodiment is identical, and details are not described herein again.
Power System Voltage Stability control device provided in an embodiment of the present invention, by being had virtually together to what is constructed
The electric power system model for walking generator carries out Bifurcation, determines the maximum value of the reactive power of load, passes through reactive power
Maximum value limits load, and avoiding load power is more than the maximum value, to improve the stability of power system voltage.
Figure 10 is the structural schematic diagram of electronic equipment provided in an embodiment of the present invention, and as shown in Figure 10, the equipment includes:
Processor (processor) 1001, memory (memory) 1002, bus 1003, and store on a memory and can locate
The computer program run on reason device.
Wherein, processor 1001 and memory 1002 complete mutual communication by bus 1003；
Processor 1001 is implemented for calling and executing the computer program in memory 1002 with executing above-mentioned each method
Step in example, for example,
Building has the electric power system model of virtual synchronous generator, obtains the equation group of system；
It is analyzed using equation group of the bifurcation theory to system, obtains the maximum value of the reactive power of load；
System loading is controlled according to the maximum value of the reactive power of load.
In addition, the logical order in above-mentioned memory can be realized and as independence by way of SFU software functional unit
Product when selling or using, can store in a computer readable storage medium.Based on this understanding, of the invention
Technical solution substantially the part of the part that contributes to existing technology or the technical solution can be with software in other words
The form of product embodies, which is stored in a storage medium, including some instructions use so that
One computer equipment (can be personal computer, server or the network equipment etc.) executes each embodiment institute of the present invention
State all or part of the steps of method.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-
Only Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can be with
Store the medium of program code.
The embodiment of the present invention provides a kind of computer program product, and the computer program product is non-transient including being stored in
Computer program on computer readable storage medium, the computer program include program instruction, when described program instructs quilt
When computer executes, computer is able to carry out the step in above-mentioned each method embodiment, for example,
Building has the electric power system model of virtual synchronous generator, obtains the equation group of system；
It is analyzed using equation group of the bifurcation theory to system, obtains the maximum value of the reactive power of load；
System loading is controlled according to the maximum value of the reactive power of load.
The embodiment of the present invention provides a kind of non-transient computer readable storage medium, is stored thereon with computer program, when
When the computer program is executed by processor, the step in above-mentioned each method embodiment is realized, for example,
Building has the electric power system model of virtual synchronous generator, obtains the equation group of system；
It is analyzed using equation group of the bifurcation theory to system, obtains the maximum value of the reactive power of load；
System loading is controlled according to the maximum value of the reactive power of load.
The embodiments such as device and equipment described above are only schematical, wherein described be used as separate part description
Unit may or may not be physically separated, component shown as a unit may or may not be
Physical unit, it can it is in one place, or may be distributed over multiple network units.It can be according to the actual needs
Some or all of the modules therein is selected to achieve the purpose of the solution of this embodiment.Those of ordinary skill in the art are not paying
In the case where creative labor, it can understand and implement.
Through the above description of the embodiments, those skilled in the art can be understood that each embodiment can
It realizes by means of software and necessary general hardware platform, naturally it is also possible to pass through hardware.Based on this understanding, on
Stating technical solution, substantially the part that contributes to existing technology can be embodied in the form of software products in other words, should
Computer software product may be stored in a computer readable storage medium, such as ROM/RAM, magnetic disk, CD, including several fingers
It enables and using so that a computer equipment (can be personal computer, server or the network equipment etc.) executes each implementation
Method described in certain parts of example or embodiment.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of Power System Voltage Stability control method characterized by comprising
Building has the electric power system model of virtual synchronous generator, obtains the equation group of system；
It is analyzed using equation group of the bifurcation theory to system, obtains the maximum value of the reactive power of load；
System loading is controlled according to the maximum value of the reactive power of load.
2. Power System Voltage Stability control method according to claim 1, which is characterized in that described to utilize fork reason
It is analyzed by the equation group to system, obtains the maximum value of the reactive power of load, specifically include:
Obtain the inertia time constant and damped coefficient of multiple groups virtual synchronous generator；
The equation group of system is input to Bifurcation tool, is obtained flat under the conditions of different inertia time constants and damped coefficient
Weigh solution manifold figure；
The maximum value of the reactive power of load is determined according to balance solution manifold figure.
3. Power System Voltage Stability control method according to claim 2, which is characterized in that described to obtain different be used to
After balance solution manifold figure under the conditions of property time constant and damped coefficient, further includes:
Bifurcation and dynamical bifurcation are obtained from balance solution manifold figure；
Generate Bifurcation corresponding voltage aperiodic instability figure and dynamical bifurcation corresponding voltage oscillogram.
4. Power System Voltage Stability control method according to claim 2, which is characterized in that described to obtain different be used to
After balance solution manifold figure under the conditions of property time constant and damped coefficient, further includes:
According to the balance solution manifold figure under the conditions of different inertia time constants and damped coefficient, inertia time constant and damping are determined
Influence of the coefficient condition to voltage stability.
5. a kind of Power System Voltage Stability control device characterized by comprising
Model construction module obtains the equation group of system for constructing the electric power system model for having virtual synchronous generator；
Power analysis module obtains the reactive power of load for analyzing using equation group of the bifurcation theory to system
Maximum value；
Load control module, the maximum value for the reactive power according to load control system loading.
6. Power System Voltage Stability control device according to claim 5, which is characterized in that the power analysis mould
Block includes acquiring unit, balance solution manifold figure generation unit and determination unit；
Acquiring unit, for obtaining the inertia time constant and damped coefficient of multiple groups virtual synchronous generator；
It balances solution manifold figure generation unit and obtains different inertial times for the equation group of system to be input to Bifurcation tool
Between balance solution manifold figure under the conditions of constant and damped coefficient；
Determination unit, the maximum value of the reactive power for determining load according to balance solution manifold figure.
7. Power System Voltage Stability control device according to claim 5, which is characterized in that further include that fork extracts
Module and voltage oscillation analog module；
Diverge extraction module, for obtaining Bifurcation and dynamical bifurcation from balance solution manifold figure；
Voltage oscillation analog module, for generating Bifurcation corresponding voltage aperiodic instability figure and dynamical bifurcation corresponding voltage
Oscillogram.
8. Power System Voltage Stability control device according to claim 5, which is characterized in that further include analysis of stability
Module is analysed, for determining that inertia time is normal according to the balance solution manifold figure under the conditions of different inertia time constants and damped coefficient
Several and influence of the damped coefficient condition to voltage stability.
9. a kind of electronic equipment, including memory, processor, and it is stored on the memory and can be on the processor
The computer program of operation, which is characterized in that when the processor executes the computer program, realize such as Claims 1-4
The step of any one Power System Voltage Stability control method.
10. a kind of non-transient computer readable storage medium, is stored thereon with computer program, which is characterized in that when the meter
When calculation machine program is executed by processor, realizing the Power System Voltage Stability control method as described in Claims 1-4 is any
Step.
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