CN116031898A - Camera optimal configuration method and system for inhibiting short-time active impact - Google Patents
Camera optimal configuration method and system for inhibiting short-time active impact Download PDFInfo
- Publication number
- CN116031898A CN116031898A CN202211662578.4A CN202211662578A CN116031898A CN 116031898 A CN116031898 A CN 116031898A CN 202211662578 A CN202211662578 A CN 202211662578A CN 116031898 A CN116031898 A CN 116031898A
- Authority
- CN
- China
- Prior art keywords
- camera
- node
- fault
- apci
- impact
- 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
- 238000000034 method Methods 0.000 title claims abstract description 32
- 230000002401 inhibitory effect Effects 0.000 title claims abstract description 9
- 238000011217 control strategy Methods 0.000 claims description 29
- 239000011159 matrix material Substances 0.000 claims description 29
- 238000005457 optimization Methods 0.000 claims description 14
- 230000008093 supporting effect Effects 0.000 claims description 13
- 238000004364 calculation method Methods 0.000 claims description 6
- 238000004590 computer program Methods 0.000 claims description 5
- 230000007123 defense Effects 0.000 claims description 5
- 230000003416 augmentation Effects 0.000 claims description 4
- 230000035945 sensitivity Effects 0.000 claims description 4
- 230000035939 shock Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 5
- 238000011158 quantitative evaluation Methods 0.000 abstract description 4
- 230000001052 transient effect Effects 0.000 description 17
- 230000004044 response Effects 0.000 description 12
- 230000035515 penetration Effects 0.000 description 8
- 230000002829 reductive effect Effects 0.000 description 8
- 230000001360 synchronised effect Effects 0.000 description 8
- 238000011084 recovery Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 238000010248 power generation Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 230000002269 spontaneous effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- -1 EEE Transact ions Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000013139 quantization Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention provides a camera optimal configuration method and a camera optimal configuration system for inhibiting short-time active impact, which are simple in method and easy to realize, can obviously reduce the scale of wind power entering low voltage ride through, improve the voltage support strength after new energy is accessed, and meanwhile, improve the frequency stability, and ensure the efficient, safe and stable operation of a power grid based on the quantitative evaluation effect of active current impact index APCI on active impact caused by large-scale wind power entering low voltage ride through.
Description
Technical Field
The invention belongs to the technical field of power grid modulation, and particularly relates to a method and a system for optimizing configuration of a camera for inhibiting short-time active impact.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The construction of a novel power system mainly based on new energy is an important way to achieve this strategic goal. At present, new energy development in China is outstanding, the total installed capacity of the whole-caliber non-fossil energy power generation is 9.8 hundred million kW by 2020, the proportion of the total installed capacity of the power generation is 44.8%, the installed capacity of the wind power and photovoltaic power generation in 2030 is expected to reach 13 hundred million kilowatts, the permeability of the new energy exceeds 100%, and the structure and the stability of a power grid are deeply changed along with the access of high-proportion new energy.
The new energy station is connected with the grid through the power electronic equipment, has the characteristics of flexible control and high response speed, but has weaker voltage-withstanding and overcurrent-resisting capabilities. When the system has AC/DC fault, the voltage drop of the power grid can directly react on the voltage of the stator end of the fan, so that larger rotor current and rotor electromotive force are induced, and the voltage and current of the rotor circuit are greatly increased.
Although the control strategy of the low voltage ride through ensures that the fan can not run off the grid, the wind turbine entering the low voltage ride through can be switched to a mode with preferential reactive power, and in the mode, the active power which can be output by the wind turbine can be greatly reduced, so that the power unbalance of the power grid is caused, and serious power impact is generated on the power grid. With the wide and large-scale access of new energy and the continuous shortening of the electrical distance between power grids, the influence range of low penetration will be larger and larger.
Regarding the influence of low penetration of large-scale wind power on the stability performance of the frequency of a power grid, the literature (power grid technology, 2021,45 (09): 3505-3514) discloses the influence of low voltage penetration of a large-area wind turbine generator set on the frequency of the power grid caused by single fault of the power grid in the future, the characteristics of different stages of the low penetration of wind power and main influence factors are analyzed, and measures for reducing the influence of low voltage penetration of large-area wind power on the frequency of the power grid are discussed. The studies in documents Study i ng the Max imum I nstantaneous Non-Synchronous Generat i on i n an I s l and System-Frequency Stab i l ity Cha l l enges i nI re l and, "i n I EEE Transact ions on Power Systems, vo l.29, no.6, pp.2943-2951, nov.2014" indicate that low frequency triggering of fan frequency rate protection by low pass leads to a series of problems such as low frequency load shedding. The literature "influence of wind-solar involved network performance on third defense line of Ningxia electric network [ J ]. Electric measurement and instrument, 2016,53 (18): 63-68,92." analyzes influence of reactive compensation device SVG on power shortage caused by low penetration, and analysis indicates that SVG can provide voltage support, thereby avoiding subsequent frequency problem.
Aiming at the method for handling the low-penetration short-time power impact of large-scale wind power, the method for analyzing the influence of the low-voltage penetration of large-scale wind power on the frequency of the power grid caused by the power grid fault and the method for handling the impact of the low-voltage penetration of large-scale wind power on the frequency of the power grid in the literature [ J ]. Power grid technology 2021,45 (09): 3505-3514 ] indicates that the method for guaranteeing the inertia level of the power grid, developing the virtual inertia transformation of new energy sources and the like can reduce the power impact. However, the proposed measures depend only on the simulation results, and no specific control strategy is proposed. From the low voltage ride through process, the impact of power surges on frequency can be reduced by adjusting the amount of active power drop during low-pass and the rate of active recovery during low-pass recovery. The literature "Impact of vo ltage d ip i nduced de l ayed act i ve power recovery on wi nd i ntegrated power systems [ J ]. Contro lEngi neer i ng Pract i ce,2017,61 (APR.)" 124-133 "and" Impact of K-factor and act i ve current reduct i on dur i ng fau lt-r ide-through of generat i ng un its connected v ia vo ltage-sourced converters on power system stab i l ity [ J ]. I ET renewab l e power generat ion,2015,9 (1): 25-36. "have studied the active recovery characteristics of a wind turbine and indicated that the rate of active recovery of a wind turbine is limited by mechanical loads and that too slow active recovery can severely affect the frequency stability of the system.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the optimal configuration method and the system for the camera for inhibiting the short-time active power impact, which are based on the quantitative evaluation effect of active current impact index APCI on the active power impact caused by large-scale wind power entering low-voltage ride through, wherein the provided optimal configuration strategy method for the camera is simple and easy to realize, can obviously reduce the scale of wind power entering low-voltage ride through, improves the voltage support strength after new energy is accessed, and meanwhile improves the frequency stability, and ensures the high-efficiency safe and stable operation of a power grid.
To achieve the above object, one or more embodiments of the present invention provide the following technical solutions: a camera optimization configuration method for inhibiting short-time active impact comprises the following steps:
accessing a camera into a power grid node containing a wind turbine generator;
and optimizing and configuring the position of the dispatching camera connected with the power grid node by taking the node voltage supporting effect of the maximized dispatching camera and the minimum active impact quantity APC I caused by the wind turbine generator entering low voltage ride through as optimization targets.
A second aspect of the present invention provides a camera optimization configuration system that suppresses short-time active impact, comprising:
and an access module: accessing a camera into a power grid node containing a wind turbine generator;
and (3) an optimal configuration module: and optimizing and configuring the position of the dispatching camera connected with the power grid node by taking the minimum active impact quantity APCI caused by the fact that the dispatching camera is maximized in the node voltage supporting effect and the wind turbine generator set enters low voltage ride through as an optimization target.
In a third aspect, an embodiment of the present invention provides a computer apparatus, including: a processor, a memory and a bus, the memory storing machine readable instructions executable by the processor, the processor and the memory in communication via the bus when the computer device is running, the machine readable instructions when executed by the processor performing the steps of a camera optimization configuration method for suppressing short-time active shocks as described in the first aspect above.
In a fourth aspect, an embodiment of the present invention provides a computer readable storage medium having a computer program stored thereon, the computer program when executed by a processor performing the steps of a camera deployment optimization configuration method for suppressing short-time active shocks as described in the first aspect above.
The one or more of the above technical solutions have the following beneficial effects:
the method for optimizing the configuration strategy of the camera is simple and easy to realize, can obviously reduce the scale of wind power entering the low voltage ride through, improves the voltage support strength after new energy is accessed, improves the frequency stability, and ensures the efficient, safe and stable operation of the power grid based on the quantitative evaluation effect of the active current impact index APCI on active impact caused by the large-scale wind power entering the low voltage ride through.
Additional aspects of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a voltage source-sub-transient reactance equivalent model of a unit in accordance with an embodiment of the present invention;
FIG. 2 is a diagram illustrating the effect of camera access on the system in accordance with a first embodiment of the present invention;
FIG. 3 is a flowchart of a configuration of a medium-sized camera according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a simulation system according to a first embodiment of the present invention;
FIG. 5 shows voltage variation of WF1 grid-connected points before and after a middle-level camera is connected in accordance with a first embodiment of the present invention;
FIG. 6 shows the system frequency variation before and after the camera is switched in the first embodiment of the present invention;
fig. 7 illustrates APCI changes before and after camera access in accordance with a first embodiment of the present invention.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention.
Embodiments of the invention and features of the embodiments may be combined with each other without conflict.
Example 1
The embodiment discloses an optimal configuration method for a camera for inhibiting short-time active impact, which comprises the following steps:
accessing a camera into a power grid node containing a wind turbine generator;
and optimizing and configuring the position of the dispatching camera connected with the power grid node by taking the node voltage support of the maximized dispatching camera and the minimum active impact quantity APCI caused by the wind turbine generator entering the low voltage ride through as optimization targets.
The voltage stabilization of the power system refers to the capability of the power system to maintain or restore the system voltage within an allowable range without voltage collapse after the power system is subjected to small or large disturbance. Under the scene of researching that large-scale wind power enters low-voltage ride through, due to the fact that the time scale of voltage change is smaller, slow control in a power grid such as an automatic voltage regulating device, static reactive compensation equipment, excitation overexcitation limit and load frequency control cannot act, and transient voltage stability is closely related to the fault type and position of the system and dynamic reactive power supporting capability. In order to simplify analysis, all power supplies in the system are equivalent to a system model of voltage source series equivalent direct-axis transient reactance, as shown in figure 1, the direct-axis transient reactance of the synchronous machine is smaller, and the capacity of providing short-circuit current is strong; the equivalent straight-axis secondary transient reactance of the new energy unit is larger, and the capacity of providing short-circuit current is weak.
For the synchronous machine, the direct-axis transient reactance Xd' is taken as a parameter of the synchronous machine unit, the value of a general turbogenerator is 0.12-0.25, the value of the turbogenerator is 0.15-0.35, and the relation between the direct-axis transient reactance and the overcurrent capacity can be obtained according to the voltage response characteristic of the fault electromechanical transient time scale:
wherein I is max The maximum short-circuit current provided to the assembly, E, is the internal potential of the assembly, here taken as 1p.u..
It can be derived from the formula (1) that due to the synchronous machine itself X d Smaller, so it provides a stronger short-circuit current capability, i.e. an over-current capability, and may provide a higher reactive support.
For the new energy unit for grid connection of the power electronic equipment, in order to prevent the damage of the power electronic equipment, the current design only allows the new energy unit to have the overcurrent capacity of 1.2 or 1.5 times of rated current, namely:
I max ＝(1.2-1.5)I N (2)
wherein I is N The rated current of the new energy unit is also referred to herein as 1p.u.. The magnitude of the equivalent direct axis transient reactance of the new energy unit can be characterized as:
the capacity of providing short-circuit current of the new energy unit can be greatly reduced compared with that of the synchronous machine according to the formula (3), and the new energy unit does not have the voltage supporting capacity of the conventional synchronous generator unit any more, so that the voltage stability is reduced after the new energy is widely connected into a power grid.
The transmission mechanism of voltage drop in the power grid: assume that the camera is connected in the cameraBefore entering the power grid, the power grid is formed, the line parameters and the network topology of the power grid are given, the power grid is provided with n nodes, and the generator sets adopt the equivalent direct-axis transient reactance model, so that an n-order node impedance matrix Z can be generated according to given conditions 0 :
According to the generated node impedance matrix, voltage drop delta U caused by faults at any node i i The resulting voltage drop DeltaU at other node j j All can pass through the self-impedance Z in the node impedance matrix ii And mutual resistance Z ij The quantization represents:
in DeltaU i Delta U is the voltage drop at node i j Z is the voltage drop at node j ii For the self-impedance of node i, Z ij And Z ji Being the transimpedance between nodes i and j, Z is due to the node impedance matrix being a symmetric matrix ij ＝Z ji ，i＝1,2,……n；j＝1,2,……n。
When the fault occurs on the line instead of the bus, the grounding fault point is equivalent to adding a virtual node in the power grid, namely the power grid becomes n+1 nodes, if a single-phase grounding fault occurs between the buses M, N, the original node impedance matrix Z is dealt with 0 And (5) performing augmentation:
the modified node impedance matrix Z has n rows and n columns of elements before the node impedance matrix Z and the node impedance matrix Z before the fault 0 The elements in (a) are the same, and the newly added elements are as follows:
wherein Z (: r) 1 )、Z(r 1 (i) original node and virtual node r) 1 A trans-impedance vector therebetween; z is Z r1r1 Is a virtual node r 1 Is a self-impedance of B (: 1), C (: 1), B (1), C (1), A 11_0 、A 11_1 、A 11_2 For a constant vector or constant determined by the power system network parameters, x is the ratio of the distance of the fault point from busbar M to the distance between busbars M, N.
In summary, when a single-phase ground short-circuit fault occurs on a line, a transfer formula of voltage drop in the power grid becomes:
wherein Z is r1j Is a virtual node r 1 And the transimpedance of other nodes j in the power grid, j=1, 2, … … n, Δu r1 Is a virtual node r 1 The amount of voltage sag caused by the fault.
In this embodiment, in order to avoid damage to power electronics and off-grid of the new energy unit during a fault, the new energy unit converter generally has a low voltage ride through capability. In order to ensure that the optimal configuration strategy of the camera provided by the method has universality, the low-voltage ride-through strategies of the following three wind turbines are selected:
(1) Low voltage ride through strategy 1: the active output of the wind turbine generator is 0 during low voltage ride through.
The wind turbine generator system can normally operate when the voltage of the grid-connected point is higher than 0.9p.u., and can enter a low-voltage ride-through mode when the voltage is lower than 0.9p.u, so that the wind turbine generator system can operate without off-grid. Most fans currently adopt a control strategy that does not output active power during low-pass, and the active impact caused by the low-pass strategy on the system is the largest.
Defining a selection function h i ：
Wherein U is i The grid-connected point voltage of the fan adopting the control strategy.
Active current I which can be output by the fan under the control strategy P The method comprises the following steps:
I P ＝h i ·I' P (10)
h in i To select a function, I' P Is the active current output by the fan under the normal working condition, I P The active current is output by the fan under the low-voltage ride-through working condition.
(2) Low voltage ride through strategy 2: the active output of the wind turbine generator system is in linear relation with the terminal voltage during low-pass period.
The embodiment sets an active output strategy of a new wind turbine during low voltage ride through, namely, the active current output of the wind turbine during low voltage ride through is proportional to the end voltage of the grid connection point, and then the active output of the control strategy during low voltage ride through is as follows:
wherein I is P K is the active output of the wind turbine generator during low voltage ride through i Is a proportionality constant, is set according to the specific condition of the operation of the fan, U N The rated voltage at the fan grid connection point, taken here as 1p.u., U i The voltage of the grid-connected point of the fan.
(3) Low voltage ride through strategy 3: the active output and the terminal voltage of the wind turbine generator are in a nonlinear relation during low-pass period.
The control strategy of supporting active and reactive power in a power grid by fully utilizing the overcurrent capacity of the wind turbine generator to provide active current while meeting reactive current requirements during voltage sag during low-voltage ride-through has been widely used at present. The active current it provides can be expressed as:
wherein I is P For active current, I max Is the maximum overcurrent of the fan, I Q Is reactive current.
China requires that wind power and photovoltaic systems provide at least 1.5% of rated reactive current per 1% of voltage drop. When the grid-connected point voltage of the wind turbine is in the range of 0.2p.u. -0.9p.u., the reactive output current reference value of the grid-side converter of the wind turbine is as follows:
I Q ＝1.5(0.9-U i )I N (13)
wherein U is i Is the per unit value of the voltage of the grid-connected point of the ith typhoon motor group in the fault interval, I N Is the rated current of the wind turbine generator.
The active current at the time of the fault can be characterized as follows:
u in i The voltage of the grid-connected point of the fan.
In this embodiment, in order to measure the magnitude of short-time active impact caused by large-scale wind power entering low-voltage ride through due to a fault of a certain node in a power grid, a new index for evaluating the magnitude of active impact, namely an active current impact index APCI (Active Power Current Impulse, APCI), is provided. The full network voltages before the fault are set to be 1p.u., and the fault at the ith node in the power network is assumed to cause deltau i The active impact APCI calculation method caused by the fault is as follows:
defining node voltage identification function D j ：
The active impact APCII on the grid during low fan wear with control strategy 1 can be expressed as:
k is the total number of fans adopting a control strategy 1 in a power grid, and grid-connected nodes are 1,2, … … k and I' P.x Active current output by the k fans under normal conditions.
Active impact APCI (advanced power control element) on power grid during low-pass period of fan adopting control strategy 2 II Can be expressed as:
wherein l is the total number of fans adopting a control strategy 2 in the power grid, and grid-connected nodes are k+1, k+2, … … k+l and I' P.y The active current output by the fan under normal conditions is used for the fan.
Active impact APCI (advanced power control element) on power grid during low-pass period of fan adopting control strategy 3 III Can be expressed as:
wherein s is the total number of fans adopting a control strategy 3 in the power grid, and grid-connected nodes are k+l+1, k+l+2, … … k+l+s and I' P.z For the active current output by the s fans under normal conditions, I max.z The maximum overcurrent of the s fans is set.
In summary, if the fan of a certain power system adopts the three control strategies, the active impact APCI caused by the failure of the ith node in the power system is as follows:
APCI i ＝APCI I +APCI II +APCI III (19)
in this embodiment, when the busbar voltage at the access position of the phase regulator is suddenly changed, the phase regulator may perform reactive response to suppress the change of the busbar voltage, and the reactive response may be divided into two parts: part is the spontaneous reactive response based on the camera's physical characteristics. Naturally occurring at the instant of a change in grid voltage, substantially without the need for response time, the spontaneous response decaying over time; the other part is reactive response based on excitation control of the phase regulator. Because the excitation system takes time to act, the reactive power cannot be generated immediately, and a certain response time is required. Wherein the spontaneous reactive response of the motor plays a direct role in voltage control, provided by transient characteristic reaction of the motor itself:
wherein: i.e d The direct axis current is used for adjusting the camera; x is X d Is a direct axis steady state reactance; x is X d ' is a direct axis transient reactance; x is X d "is the direct axis secondary transient reactance; e (E) q0 ' is the intra-transient potential; e (E) q0 Is at no-load potential; u (U) 0- Is the voltage of the front end of the jump; u (U) 0+ Is the voltage of the machine terminal after abrupt change; t (T) d ' is a straight axis transient short circuit time constant; t (T) d "is the time constant of the transient short circuit of the straight axis time; t (T) a The transient time constant of the stator winding corresponds to the decay time constant of the non-periodic current component of the stator in the abc system; omega is the synchronous angular velocity; delta 0 Is the initial phase angle of the unit before short circuit.
As can be seen from equation (20), the magnitude of the instantaneous reactive power after a fault is mainly determined by the voltage variation amplitude and the secondary transient reactance, and the larger the voltage variation amplitude is, the smaller the secondary transient reactance is, and the larger the instantaneous reactive power is.
As shown in fig. 2, after the camera is connected to the node i of the original n-node power system, the chain z connected in parallel to the ground can be considered to be added in the power grid io 。
The impact on the node impedance matrix of the system after its access is:
wherein Z is i ＝[Z 1i …Z ii …Z ni ]Is the ith row of the node impedance matrix Z, zi T Is Z i Is a transposed matrix of (a). Expanding the matrix, then any element of Z' can be expressed as:
wherein p=1, 2, …, n; q=1, 2, …, n.
From the above, it can be seen that when parallel-connected phase-regulating device branches are added into the power grid, all elements of the node impedance matrix are reduced, wherein Z ii The most decrease.
Then after the camera is switched in, the formula (5) is changed to:
as can be readily seen from formula (19):
i.e. the magnitude of the short-time active impact suffered by the power system is positively correlated with the voltage drop at the grid-connected point of the blower.
In summary, the camera suppresses the magnitude of the active power impact APCI by suppressing the transfer of the voltage sag in the power system.
In the implementation, the voltage drop at the grid connection point of the fan can be effectively improved when a fault occurs by configuring the camera in the power grid to exert the dynamic reactive power supporting performance of the camera, and the voltage supporting capability of the power grid is improved. The aim of the optimized configuration of the synchronous camera is to maximize the node voltage supporting effect of the camera, minimize the active impact quantity APCI caused by the wind turbine entering the low voltage ride through, and reduce the impact of the wind turbine entering the low voltage ride through on the system frequency. Therefore, the optimal configuration targets of the camera can be obtained as follows:
minS＝minAPCI (25)
s is the total configuration capacity of the camera, and APCI is the sum of active impact caused by the fan entering low voltage ride through.
Of all types of short-circuit faults occurring in the power system, the single-phase-to-ground short-circuit fault accounts for 65%. Therefore, bus single-phase grounding short-circuit and line single-phase grounding short-circuit faults are selected as the expected accident set.
Based on the expected accident set and the parameters and topology of the power grid, the proposed configuration strategy flow chart of the camera is shown in fig. 3, and the specific configuration strategy is as follows:
step 1: renumbering nodes of the system, wherein the grid-connected points of the fans of the control strategy 1 are numbered 1,2 and … … k, the grid-connected points of the fans of the control strategy 2 are numbered k+1, k+2 and … … k+l, and the grid-connected points of the fans of the control strategy 3 are numbered k+l+1, k+l+2 and … … k+l+s;
step 2: generating a node admittance matrix Y of the power grid according to given power grid parameters and network topology, and solving an inverse matrix of the node admittance matrix to generate a node impedance matrix Z;
step 3: setting bus faults according to the fault set, and calculating active current impact APCI caused by each bus fault i ；
Wherein k is the total number of fans adopting the control strategy 1 in the power grid, and grid-connected nodes are 1,2, … … k and I' P.x Active current output by the k fans under normal conditions; l is the total number of fans adopting a control strategy 2 in the power grid, and grid-connected nodes are k+1, k+2, … … k+l and I' P.y For the active current output by the fan under normal condition, Z iy Z is the transimpedance between the fault point i and the grid-connected bus of the y-th fan ii Is the self-impedance of the node where the fault point i is located, deltaU i Is the voltage drop at the fault point i; s is the total number of fans adopting a control strategy 3 in the power grid, and grid-connected nodes are k+l+1, k+l+2, … … k+l+s and I' P.z For the active current output by the s fans under normal conditions, I max.z For the maximum overcurrent of the s fans, Z iz Z is the transimpedance between the fault point i and the grid-connected bus of the Z-th fan ii As the self-impedance of the node where the fault point i is located, Δui is the voltage drop at the fault point i.
Step 4: setting line faults according to the fault set, simultaneously carrying out augmentation treatment on a node impedance matrix Z according to virtual nodes grounded by the line faults, and calculating active current impact APCI caused by each line fault j ；
Wherein Z is r1y Is a virtual node r 1 The mutual impedance between the grid-connected bus and the y-th fan, Z r1r1 Is a virtual node r 1 DeltaUr1 is the virtual node r 1 Voltage drop at, Z r1z Is a virtual node r 1 And the mutual impedance between the grid-connected bus and the z-th fan.
Step 5: comparing the magnitude of active current impact APCI caused by each bus fault and each line fault, and selecting the fault point with the largest APCI as a fault impact node;
step 6: and setting a fault impact node to generate a fault, calculating active current impact APCI after each bus of the whole network is respectively configured with cameras with the capacity of 300MVar, wherein the node with the minimum APCI is the node with the highest configuration sensitivity of the cameras, namely the node with the optimal configuration of the cameras.
Wherein Z' iy Z 'is the transimpedance between the fault point i after the camera is connected and the grid-connected bus of the y-th fan' ii For the self-impedance of the node where the fault point i is located after the camera is accessed, deltaU i For voltage drop at fault point i, Z' iz And the mutual impedance between the fault point i and the grid-connected bus of the z-th fan after the camera is connected.
Step 7: and (3) stopping configuration of the camera if the frequency drop after the power system is subjected to the expected accident meets the requirement of the low-frequency defense line of the power system after the camera is connected, otherwise, continuing to screen the configuration position of the 2 nd camera in the step (1) until the requirement of the power grid is met.
In order to verify the suppression effect of the camera optimization configuration strategy provided by the implementation on the short-time power impact of large-scale wind power caused by faults, a new England 10 machine 39 node system accessed by a plurality of wind power stations is selected, and the structure of the new England 10 machine 39 node system is shown in figure 4. The system contains 5 wind farms, which are respectively connected into the system through nodes 8, 10, 21, 23 and 29 and are numbered WF 1-WF 5. Each wind power plant contains 40 fans with the capacity of 5 MW. Wherein a fan of WF1 adopts a control strategy 1; the fans of WF2 and WF3 adopt a control strategy 2, and K2=0.8 and K3=0.7 are selected; the fans of WF4 and WF5 adopt a control strategy 3.
Under the working condition of large new energy, the single-phase grounding short circuit fault can cause the whole-network wind turbine to enter low-voltage ride through. And selecting an a-phase grounding short-circuit fault with the duration of 0.1s respectively occurring in all buses and lines of the 39-node system as an expected accident set, solving an active impact index in the set, and verifying by adopting DIgSILENT/PowerFactoy simulation software.
Based on the configuration flow and the simulation model, the configuration strategy of the camera provided by the implementation is subjected to calculation example analysis, and the calculation result is as follows:
TABLE 1 APCI before and after camera deployment
The fault set of the whole network is calculated, the maximum active impact caused by the fault of the node 16 is 67.44, and the node 16 is selected as the fault impact node. The node 16 is set to fail, and the camera configuration node is calculated, so that the highest suppression effect of the camera configuration at the node 10 on the active impact can be obtained, namely the highest sensitivity of the camera configuration is achieved, at this time, the active impact APCI caused by the failure of the node 16 on the whole network is 34.30, and the active impact caused by the failure is reduced to about half of the original active impact after the camera configuration strategy of the embodiment is adopted.
As shown in fig. 5, the voltage response waveforms of the grid connection point of the wind farm WF1 before and after the switching in of the switching camera are shown when the node 16 fails, the voltage of the grid connection point of the wind farm drops to 0.8238 p.u. before the switching in of the switching camera due to the short circuit fault, so that all wind turbines of the WF1 enter low voltage ride through, active impact equivalent to the off-grid of the whole wind farm is caused to the whole grid, the frequency response of the system is deteriorated, and as shown in fig. 6, the active impact caused by the wind power low voltage ride through may even touch the low frequency defense line of the power system, and system breakdown may be caused when serious; after the phase-change modulator is connected, the voltage of the grid-connected point of the WF1 is raised to be above 0.9p.u. due to the dynamic voltage supporting performance of the phase-change modulator, so that the wind turbine generator of the WF1 is prevented from entering low voltage ride through, short-time power impact is restrained, the lowest frequency point caused by the low voltage ride through of the wind turbine generator is improved, as shown in figure 6, the system is prevented from triggering low-frequency load shedding due to power shortage, and meanwhile, the connection of the phase-change modulator restrains the fluctuation of the voltage of a grid-connected bus of the fan after fault removal, and the voltage of the bus is enabled to be more stable.
In order to ensure that the strategy proposed in this embodiment not only can support the system voltage when the node 16 fails, this embodiment analyzes APCI when other system nodes fail, as shown in fig. 7, it can be seen that under the configuration strategy of the camera in this embodiment, active impact APCI caused by failure of each node in the system is reduced, and because the camera is configured at the node 10, the node 10 fails to shield the dynamic voltage supporting performance of the camera, so that the APCI of the node 10 is unchanged.
In summary, in the fault set selected in the calculation example of the embodiment, the cameras can play the role of dynamic voltage support, so as to inhibit the wind turbine from entering the area of low voltage ride through, and avoid the frequency problem of the system while improving the voltage support strength of the power grid.
According to the embodiment, based on the quantitative evaluation effect of the active current impact index APCI on active impact caused by large-scale wind power entering low-voltage ride through, the provided dispatching machine optimizing configuration strategy method is simple and easy to realize, the scale of wind power entering low-voltage ride through can be obviously reduced, the voltage support intensity after new energy is accessed is improved, the frequency stability is improved, and the efficient, safe and stable operation of a power grid is ensured.
Example two
It is an object of the present embodiment to provide a computing device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, which processor implements the steps of the method described above when executing the program.
Example III
An object of the present embodiment is to provide a computer-readable storage medium.
A computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of the above method.
Example IV
An object of the present embodiment is to provide a camera optimization configuration system for suppressing short-time active impact, including:
and an access module: accessing a camera into a power grid node containing a wind turbine generator;
and (3) an optimal configuration module: and optimizing and configuring the position of the dispatching camera connected with the power grid node by taking the minimum active impact quantity APCI caused by the fact that the dispatching camera is maximized in the node voltage supporting effect and the wind turbine generator set enters low voltage ride through as an optimization target.
The steps involved in the devices of the second, third and fourth embodiments correspond to those of the first embodiment of the method, and the detailed description of the embodiments can be found in the related description section of the first embodiment. The term "computer-readable storage medium" should be taken to include a single medium or multiple media including one or more sets of instructions; it should also be understood to include any medium capable of storing, encoding or carrying a set of instructions for execution by a processor and that cause the processor to perform any one of the methods of the present invention.
It will be appreciated by those skilled in the art that the modules or steps of the invention described above may be implemented by general-purpose computer means, alternatively they may be implemented by program code executable by computing means, whereby they may be stored in storage means for execution by computing means, or they may be made into individual integrated circuit modules separately, or a plurality of modules or steps in them may be made into a single integrated circuit module. The present invention is not limited to any specific combination of hardware and software.
While the foregoing description of the embodiments of the present invention has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the invention, but rather, it is intended to cover all modifications or variations within the scope of the invention as defined by the claims of the present invention.
Claims (10)
1. The optimal configuration method for the camera for inhibiting the short-time active power impact is characterized by comprising the following steps of:
accessing a camera into a power grid node containing a wind turbine generator;
and optimizing and configuring the position of the dispatching camera connected with the power grid node by taking the minimum active impact quantity APCI caused by the fact that the dispatching camera is maximized in the node voltage supporting effect and the wind turbine generator set enters low voltage ride through as an optimization target.
2. The optimal configuration method for a camera for inhibiting short-time active power impact according to claim 1, wherein a low-voltage ride-through strategy adopted by a wind turbine generator is specifically as follows: control strategy 1:
the active output of the wind turbine generator is 0 during low voltage ride through; control strategy 2: the active output of the wind turbine generator system is in linear relation with the terminal voltage during low-pass period; control strategy 3: the active output and the terminal voltage of the wind turbine generator are in a nonlinear relation during low-pass period.
3. The optimal configuration method for a tuner for suppressing short-time active power impact according to claim 1, wherein the optimal configuration for the position of the tuner at which the tuner is connected to a power grid node specifically comprises:
step 1: generating a node admittance matrix of the power grid according to given power grid parameters and network topology, and solving an inverse matrix of the node admittance matrix to generate a node impedance matrix;
step 2: setting bus faults according to the fault set, and calculating active current impact APCI caused by each bus fault i ；
Step 3: setting line faults according to the fault set, simultaneously carrying out augmentation treatment on the node impedance matrix according to virtual nodes grounded by the line faults, and calculating active current impact APCI caused by each line fault j ；
Step 4: comparing the magnitude of active current impact APCI caused by each bus fault and each line fault, and selecting the fault point with the largest APCI as a fault impact node;
step 5: setting a fault impact node to generate a fault, calculating an active current impact APCI after each bus of the whole network is respectively configured with a camera, wherein the node with the minimum APCI is the node with the highest configuration sensitivity of the camera, namely the node with the optimal configuration of the camera;
step 6: and (3) stopping configuration of the camera if the frequency drop after the power system is subjected to the expected accident meets the requirement of the low-frequency defense line of the power system after the camera is connected, otherwise, continuing to screen the configuration position of the 2 nd camera in the step (1) until the requirement of the power grid is met.
4. The optimal configuration method for a camera for suppressing short-time active power impact according to claim 3, wherein in step 2, active current impact APCI caused by each bus fault i The calculation formula of (2) is as follows:
APCI i ＝APCI I +APCI II +APCI III
wherein k is the total number of fans adopting the control strategy 1 in the power grid, I' P.x Active current output by the k fans under normal conditions; l is the total number of fans adopting control strategy 2 in the power grid, I' P.y Active current output by the fan under normal conditions is used for the fan; s is the total number of fans adopting control strategy 3 in the power grid, I' P.z For the active current output by the s fans under normal conditions, I max.z The maximum overcurrent of the s fans is set.
5. The optimal configuration method for a camera for suppressing short-time active power surge as defined in claim 4, wherein in step 3, active current surge APCI caused by each line fault j Is calculated as follows:
wherein Z is r1y Is a virtual node r 1 The mutual impedance between the grid-connected bus and the y-th fan, Z r1r1 Is a virtual node r 1 Is a self-impedance of DeltaU r1 Is a virtual node r 1 Voltage drop at, Z r1z Is a virtual node r 1 And the mutual impedance between the grid-connected bus and the z-th fan.
6. The optimal configuration method for a camera for suppressing short-time active power impact according to claim 5, wherein in step 5, the calculation of the active current impact APCI after the camera is configured for each bus of the whole network is as follows:
wherein Z' iy Z 'is the transimpedance between the fault point i after the camera is connected and the grid-connected bus of the y-th fan' ii For the self-impedance of the node where the fault point i is located after the camera is accessed, deltaU i Is the voltage drop Z 'at the fault point i' iz And the mutual impedance between the fault point i and the grid-connected bus of the z-th fan after the camera is connected.
7. An optimal configuration system for a camera for suppressing short-time active power impact, comprising:
and an access module: accessing a camera into a power grid node containing a wind turbine generator;
and (3) an optimal configuration module: and optimizing and configuring the position of the dispatching camera connected with the power grid node by taking the minimum active impact quantity APCI caused by the fact that the dispatching camera is maximized in the node voltage supporting effect and the wind turbine generator set enters low voltage ride through as an optimization target.
8. The optimal configuration system for a dispatching camera for suppressing short-time active power impact according to claim 7, wherein the optimal configuration module performs optimal configuration on the position of the dispatching camera connected to the power grid node, and specifically comprises:
step 1: generating a node admittance matrix of the power grid according to given power grid parameters and network topology, and solving an inverse matrix of the node admittance matrix to generate a node impedance matrix;
step 2: setting bus faults according to the fault set, and calculating active current impact APCI caused by each bus fault i ；
Step 3: setting line faults according to the fault set, simultaneously carrying out augmentation treatment on the node impedance matrix according to virtual nodes grounded by the line faults, and calculating active current impact APCI caused by each line fault j ；
Step 4: comparing the magnitude of active current impact APCI caused by each bus fault and each line fault, and selecting the fault point with the largest APCI as a fault impact node;
step 5: setting a fault impact node to generate a fault, calculating an active current impact APCI after each bus of the whole network is respectively configured with a camera, wherein the node with the minimum APCI is the node with the highest configuration sensitivity of the camera, namely the node with the optimal configuration of the camera;
step 6: and (3) stopping configuration of the camera if the frequency drop after the power system is subjected to the expected accident meets the requirement of the low-frequency defense line of the power system after the camera is connected, otherwise, continuing to screen the configuration position of the 2 nd camera in the step (1) until the requirement of the power grid is met.
9. A computer device, comprising: a processor, a memory and a bus, said memory storing machine readable instructions executable by said processor, said processor and said memory communicating via the bus when the computer device is running, said machine readable instructions when executed by said processor performing the steps of a camera optimization configuration method of suppressing short-time active shocks as claimed in any one of claims 1 to 6.
10. A computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, which when executed by a processor performs the steps of a camera deployment optimization configuration method of suppressing short-time active shocks as claimed in any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211662578.4A CN116031898B (en) | 2022-12-23 | 2022-12-23 | Camera optimal configuration method and system for inhibiting short-time active impact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211662578.4A CN116031898B (en) | 2022-12-23 | 2022-12-23 | Camera optimal configuration method and system for inhibiting short-time active impact |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116031898A true CN116031898A (en) | 2023-04-28 |
| CN116031898B CN116031898B (en) | 2024-04-05 |
Family
ID=86075273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211662578.4A Active CN116031898B (en) | 2022-12-23 | 2022-12-23 | Camera optimal configuration method and system for inhibiting short-time active impact |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116031898B (en) |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664427A (en) * | 2012-05-25 | 2012-09-12 | 华北电力大学（保定） | Active and reactive coordination control method for permanent-magnet direct-driven wind turbines in low-voltage ride-through process |
| WO2014079278A1 (en) * | 2012-11-22 | 2014-05-30 | 国家电网公司 | Method for configuring reactive compensation device of large-scale wind power transmission system |
| CN104362678A (en) * | 2014-11-21 | 2015-02-18 | 国家电网公司 | Method for analyzing counter measures on influences of connection of wind power plant on partial electric network |
| CN106611965A (en) * | 2016-12-19 | 2017-05-03 | 中国电力科学研究院 | Wind power plant coordination control method and system capable of preventing large-scale wind power frequent ride-through |
| CN107579540A (en) * | 2017-08-18 | 2018-01-12 | 河海大学 | A kind of marine wind electric field resultant fault traversing method grid-connected based on HVAC |
| CN107591839A (en) * | 2017-09-25 | 2018-01-16 | 江苏大学 | Virtual synchronous generator low voltage traversing control method based on excited state analysis |
| CN107994607A (en) * | 2017-11-29 | 2018-05-04 | 中国电力科学研究院有限公司 | A kind of capacity configuration optimizing method and system of Reactive Compensation in Wind Farm device |
| US10581247B1 (en) * | 2019-05-06 | 2020-03-03 | General Electric Company | System and method for reactive power control of wind turbines in a wind farm supported with auxiliary reactive power compensation |
| CN111799813A (en) * | 2020-07-17 | 2020-10-20 | 广东电网有限责任公司电力科学研究院 | Offshore wind power plant reactive power optimization configuration method considering reactive power regulation of wind turbine generator |
| WO2021103482A1 (en) * | 2019-11-26 | 2021-06-03 | 新疆金风科技股份有限公司 | Reactive power control method and apparatus for wind turbine generator set, and wind power plant |
| CN113054686A (en) * | 2021-05-11 | 2021-06-29 | 东北电力大学 | Low voltage ride through control method and device for permanent magnet wind turbine generator |
| CN113517719A (en) * | 2021-08-27 | 2021-10-19 | 华北电力大学（保定） | Full-power variable-current wind turbine generator high-voltage ride-through control strategy |
| WO2021258508A1 (en) * | 2020-06-22 | 2021-12-30 | 山东大学 | Low-voltage ride-through control method and system for wind turbine generator |
| CN114626575A (en) * | 2022-02-07 | 2022-06-14 | 三峡大学 | Reactive power planning method for receiving-end power grid containing high-permeability wind power and considering transient voltage stability |
| CN115133569A (en) * | 2022-05-07 | 2022-09-30 | 国网浙江省电力有限公司台州供电公司 | Fault ride-through method for low-frequency power transmission grid connection of permanent magnet direct-drive fan |
-
2022
- 2022-12-23 CN CN202211662578.4A patent/CN116031898B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664427A (en) * | 2012-05-25 | 2012-09-12 | 华北电力大学（保定） | Active and reactive coordination control method for permanent-magnet direct-driven wind turbines in low-voltage ride-through process |
| WO2014079278A1 (en) * | 2012-11-22 | 2014-05-30 | 国家电网公司 | Method for configuring reactive compensation device of large-scale wind power transmission system |
| CN104362678A (en) * | 2014-11-21 | 2015-02-18 | 国家电网公司 | Method for analyzing counter measures on influences of connection of wind power plant on partial electric network |
| CN106611965A (en) * | 2016-12-19 | 2017-05-03 | 中国电力科学研究院 | Wind power plant coordination control method and system capable of preventing large-scale wind power frequent ride-through |
| CN107579540A (en) * | 2017-08-18 | 2018-01-12 | 河海大学 | A kind of marine wind electric field resultant fault traversing method grid-connected based on HVAC |
| CN107591839A (en) * | 2017-09-25 | 2018-01-16 | 江苏大学 | Virtual synchronous generator low voltage traversing control method based on excited state analysis |
| CN107994607A (en) * | 2017-11-29 | 2018-05-04 | 中国电力科学研究院有限公司 | A kind of capacity configuration optimizing method and system of Reactive Compensation in Wind Farm device |
| US10581247B1 (en) * | 2019-05-06 | 2020-03-03 | General Electric Company | System and method for reactive power control of wind turbines in a wind farm supported with auxiliary reactive power compensation |
| WO2021103482A1 (en) * | 2019-11-26 | 2021-06-03 | 新疆金风科技股份有限公司 | Reactive power control method and apparatus for wind turbine generator set, and wind power plant |
| WO2021258508A1 (en) * | 2020-06-22 | 2021-12-30 | 山东大学 | Low-voltage ride-through control method and system for wind turbine generator |
| CN111799813A (en) * | 2020-07-17 | 2020-10-20 | 广东电网有限责任公司电力科学研究院 | Offshore wind power plant reactive power optimization configuration method considering reactive power regulation of wind turbine generator |
| CN113054686A (en) * | 2021-05-11 | 2021-06-29 | 东北电力大学 | Low voltage ride through control method and device for permanent magnet wind turbine generator |
| CN113517719A (en) * | 2021-08-27 | 2021-10-19 | 华北电力大学（保定） | Full-power variable-current wind turbine generator high-voltage ride-through control strategy |
| CN114626575A (en) * | 2022-02-07 | 2022-06-14 | 三峡大学 | Reactive power planning method for receiving-end power grid containing high-permeability wind power and considering transient voltage stability |
| CN115133569A (en) * | 2022-05-07 | 2022-09-30 | 国网浙江省电力有限公司台州供电公司 | Fault ride-through method for low-frequency power transmission grid connection of permanent magnet direct-drive fan |
Non-Patent Citations (7)
| Title |
|---|
| XINYU WEI: "Optimal Configuration Strategy of Condensers for Suppressing Large-scale Wind Power Generation Low Voltage Ride Through Short-time Active Power Impact", 《2023 INTERNATIONAL CONFERENCE ON POWER SYSTEM TECHNOLOGY》, 6 November 2023 (2023-11-06), pages 1 - 5 * |
| YANG LIU: "Low-Voltage Ride-Through Control Strategy for Direct-Driven Wind Power System Based on Quasi-Proportional Resonant Controller", 《2019 IEEE 8TH INTERNATIONAL CONFERENCE ON ADVANCED POWER SYSTEM AUTOMATION AND PROTECTION (APAP)》, 15 October 2020 (2020-10-15), pages 1322 - 1326 * |
| 刘洋: "电网故障导致大面积风电低电压穿越对 电网频率的影响分析及措施", 《电网技术》, 30 September 2021 (2021-09-30), pages 3505 - 3513 * |
| 周莹坤: "提升电网电压支撑强度的调相机优化配置方法", 《电网技术》, vol. 46, no. 10, 31 October 2022 (2022-10-31), pages 3848 - 3856 * |
| 张建华;丁磊;戴春蕾;沈浩然;于东霞;: "基于定子侧新型Crowbar的双馈发电机低电压穿越研究", 电气传动, no. 07, 10 October 2016 (2016-10-10), pages 44 - 50 * |
| 李和明;董淑惠;王毅;任亚钊;: "永磁直驱风电机组低电压穿越时的有功和无功协调控制", 电工技术学报, no. 5, 26 May 2013 (2013-05-26), pages 73 - 81 * |
| 詹锦;陈波;熊永新;程思萌;姚伟;陶翔;文劲宇;: "利用调相机提升送端双馈风机高电压穿越能力的协调控制", 电力系统保护与控制, no. 18, 16 September 2020 (2020-09-16), pages 59 - 68 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116031898B (en) | 2024-04-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Duong et al. | The impacts of distributed generation penetration into the power system | |
| Patel et al. | Impact of wind turbine generators on network resonance and harmonic distortion | |
| Mosaad et al. | Ferroresonance overvoltage mitigation using STATCOM for grid-connected wind energy conversion systems | |
| Mishra et al. | A novel controller for frequency regulation in a hybrid system with high PV penetration | |
| Ellis et al. | PV system modeling for grid planning studies | |
| Mu et al. | The mechanism of DFIGs grouping tripped off from power grid | |
| Murad et al. | Frequency control through voltage regulation of power system using SVC devices | |
| Tzelepis et al. | Impact of synchronous condensers on transmission line protection in scenarios with high penetration of renewable energy sources | |
| CN116031898B (en) | Camera optimal configuration method and system for inhibiting short-time active impact | |
| Sarwar et al. | Improvement of fault ride through capability of DFIG-based wind turbine systems using superconducting fault current limiter | |
| Shah et al. | Dual-loop primary frequency regulation controller for VSC-HVDC system | |
| CN109256798A (en) | DFIG system passes through operation method under a kind of voltage symmetry failure | |
| Song et al. | Short-circuit analysis of grid-connected PV power plants considering inverter limits and grid-support | |
| Yana et al. | Decentralised control of dc microgrid based on virtual admittance to enhance dc voltage and grid frequency support | |
| Yang et al. | Exploration of time-delay effect on the stability of grid-connected power converters with virtual inertia | |
| Zhu et al. | Transient Voltage Security Assessment for the High Renewable Power-Penetrated UHVDC Sending-End Power Grid | |
| CN105207249A (en) | Wind power plant constant power factor control system and control method thereof | |
| Luo et al. | Study on subsynchronous resonance damping control for series-compensated DFIG-based wind farm | |
| Dicorato et al. | Voltage compensation for wind integration in power systems | |
| Chang et al. | Impact of Nonlinearity on Type-3 WT's Fault Current | |
| Wang et al. | Study on AC Transient Overvoltage Suppression of LCC-HVDC Sending End System Based on DC Current Control Optimization | |
| Li et al. | Voltage Stability Index based Synchronous Condenser Capacity Configuration Strategy of Sending EndSystem Integrated Renewable Energies | |
| Liu et al. | Temporary overvoltage assessment and suppression in heterogeneous renewable energy power systems | |
| Yu et al. | Analysis and iterative calculation of a distribution network with inverted-based distributed generations under fault conditions | |
| Mehta et al. | Transient stability enhancement of multi-machine hybrid power system employing modified series resonance type fault current limiter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | 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 |