CN112583059A - Control method and device for new energy station - Google Patents
Control method and device for new energy station Download PDFInfo
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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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/50—Controlling the sharing of the out-of-phase component
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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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- 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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
- H02J3/1842—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein at least one reactive element is actively controlled by a bridge converter, e.g. active filters
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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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
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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
- Y02E40/10—Flexible AC transmission systems [FACTS]
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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
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Abstract
The application discloses a control method and device for a new energy station. Wherein, the method comprises the following steps: determining a first reactive current regulation capacity of power generation equipment in a power generation state in the target new energy station, wherein the first reactive current regulation capacity is the residual reactive current regulation capacity of the target new energy station; acquiring a second reactive current regulation capacity currently required by the target new energy station; comparing the first reactive current regulation capacity with the second reactive current regulation capacity; and executing a steady-state control strategy corresponding to the comparison result according to the comparison result, wherein the steady-state control strategy is used for determining whether to control the static var generator SVG to adjust the first reactive current adjusting capacity and/or the second reactive current adjusting capacity. The method and the device solve the technical problem that the power loss of the new energy station is overlarge due to the fact that the whole adjusting capacity of the new energy station cannot be exerted or the whole process of the SVG is put into use because the SVG does not run in coordination with the new energy station in the related technology.
Description
Technical Field
The application relates to the field of electric power, in particular to a control method and device for a new energy station.
Background
The SVG is widely applied to new energy stations and provides steady-state voltage regulation and transient reactive support. However, at present, SVG generally does not operate in coordination with power generation equipment of a new energy station, and therefore, the whole process of SVG may be put into operation to cause excessive power loss of the SVG, or the SVG cannot exert all regulation capabilities of the new energy station when the system has a demand.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the application provides a control method and a control device for a new energy station, and the technical problem that the power loss of the new energy station is too large due to the fact that the whole adjusting capacity of the new energy station cannot be exerted or the whole process of SVG is put into use because SVG and the new energy station do not run in a coordinated mode in the related technology is at least solved.
According to an aspect of an embodiment of the present application, there is provided a control method of a new energy station, including: determining a first reactive current regulation capacity of power generation equipment in a power generation state in the target new energy station, wherein the first reactive current regulation capacity is the residual reactive current regulation capacity of the target new energy station; acquiring a second reactive current regulation capacity currently required by the target new energy station; comparing the first reactive current regulation capacity with the second reactive current regulation capacity; and executing a steady-state control strategy corresponding to the comparison result according to the comparison result, wherein the steady-state control strategy is used for determining whether to control the static var generator SVG to adjust the first reactive current adjusting capacity and/or the second reactive current adjusting capacity.
Optionally, executing a steady-state control strategy corresponding to the comparison result according to the comparison result, including: when the comparison result shows that the first reactive current regulation capacity is larger than the second reactive current regulation capacity; executing a steady-state control strategy corresponding to the comparison result; and the steady-state control strategy is that the target new energy station adjusts the second reactive power adjusting capacity.
Optionally, a steady-state control strategy corresponding to the comparison result is executed according to the comparison result, and the method further includes: when the comparison result shows that the first reactive current regulation capacity is smaller than the second reactive current regulation capacity, calculating a difference value between the second reactive current regulation capacity and the first reactive current regulation capacity; executing a steady-state control strategy corresponding to the comparison result; the steady-state control strategy is characterized in that the first reactive current regulation capacity is regulated by the target new energy station, and the difference value is regulated by the Static Var Generator (SVG), wherein the SVG is located in the target new energy station and is connected with the target new energy station.
Optionally, when the target new energy power station is in transient disturbance, the control strategy corresponding to the transient disturbance is to perform closed-loop regulation on the output of the SVG.
Optionally, the output of the SVG is closed-loop regulated by:
wherein, IQIs the output of SVG, wherein the output is a given value of reactive current, VrefIs a voltage set value, VactIs a voltage feedback value, KPFor proportional control coefficients, T1、T2The correction coefficients are a lead correction coefficient and a lag correction coefficient.
Optionally, determining a first reactive current regulation capacity of the power generation equipment in the power generation state in the target new energy site comprises: obtaining rated active power in the target new energy station and rated power factors of power generation equipment; acquiring total active power, total reactive power and multi-machine equivalent voltage in a target new energy station; and determining the first reactive current regulation capacity of the power generation equipment in the target new energy station in the power generation state according to the rated active power, the rated power factor, the total active power, the total reactive power and the multi-machine equivalent voltage.
Optionally, determining a first reactive current regulation capacity of the power generation equipment in the target new energy site in the power generation state according to the rated active power, the rated power factor, the total active power, the total reactive power and the multi-machine equivalent voltage, and including: determining a first reactive current regulating capacity by the formula:
wherein, IQGFor the first reactive current regulating capacity, PNRated active power in the new energy station, thetaNIs the rated power factor, P, of the power plantACTIs the total active power, QACTAs total reactive power, VACTThe voltage is equivalent to a plurality of voltages.
According to another aspect of the embodiments of the present application, there is also provided a control apparatus for a new energy station, including: the determination module is used for determining first reactive current regulation capacity of power generation equipment in a power generation state in the target new energy station, wherein the first reactive current regulation capacity is the residual reactive current regulation capacity of the target new energy station; the acquisition module is used for acquiring a second reactive current regulation capacity currently required by the target new energy station; the comparison module is used for comparing the first reactive current regulation capacity with the second reactive current regulation capacity; and the execution module is used for executing a steady-state control strategy corresponding to the comparison result according to the comparison result, wherein the steady-state control strategy is used for determining whether to control the static var generator SVG to adjust the first reactive current regulation capacity and/or the second reactive current regulation capacity.
According to another aspect of the embodiments of the present application, there is also provided a non-volatile storage medium, where the non-volatile storage medium includes a stored program, and where the program is executed to control a device in which the non-volatile storage medium is located to execute any one of the control methods of the new energy station.
According to another aspect of the embodiments of the present application, there is also provided a processor, where the processor is configured to execute a program, where the program executes any one of the control methods of the new energy station when running.
In the embodiment of the application, the purpose of executing the control strategy corresponding to the comparison result is achieved by comparing the magnitudes of the first reactive current regulation capacity and the second reactive power regulation capacity according to different comparison results, so that the technical effect that the power loss of the new energy field station is large or the whole regulation capacity of the new energy field station cannot be fully exerted due to the fact that the whole process of SVG participates in current capacity regulation is achieved, and the technical problem that the whole regulation capacity of the new energy field station cannot be exerted or the power loss of the new energy field station is too large due to the fact that the SVG does not coordinate with the new energy field station in the related technology is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic flow chart of an alternative control method for a new energy station according to an embodiment of the present application;
FIG. 2 is a schematic flow chart of an alternative method of determining turndown capability and turndown demand according to the present application;
FIG. 3 is a schematic diagram of closed loop regulation of the output of SVG;
fig. 4 is a schematic structural diagram of an alternative control device of a new energy station according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In order to better understand the embodiments of the present application, the technical terms referring to the embodiments of the present application will be explained as follows:
the intelligent power grid AVC refers to automatic voltage reactive power control of a power grid, realizes intelligent AVC, is in line with the strategic requirements of social development for guaranteeing the quality of electric energy, improving the transmission efficiency, reducing the loss of the power grid and realizing stable operation and economic operation, and has long-term significance for co-creation and society. The AVC system is a power grid voltage reactive power control system which operates in an online mode, real-time data such as bus voltage, bus reactive power, main transformer height and low-voltage side reactive power measurement data of each transformer substation and power plant, switch state data and the like are acquired through a dispatching automatic SCADA system to be analyzed and calculated on line, parameters of various reactive power control equipment in the whole network are adjusted from the angle of power grid optimized operation, centralized monitoring and analysis calculation are carried out on the parameters, under the constraint conditions that normal power balance of nodes and various safety indexes are met, the comprehensive optimization target that the tap switch adjustment times of a main transformer are minimum, capacitor switching is reasonable most, a generator has optimal reactive power output, the voltage qualified rate is highest, and the loss rate of a power transmission network is minimum is achieved, the economic operation process of the power grid is achieved, and automatic closed-loop control of coordinated optimization on reactive.
Static var generator, english description is: static Var Generator, abbreviated as SVG. Also known as a high-voltage dynamic reactive power compensation generating device or a static synchronous compensator. The device is a device for performing dynamic reactive power compensation by a power semiconductor bridge type converter with free phase change. SVG is the best solution in the field of reactive power control at present. Compared with the traditional modes of phase modulators, capacitor reactors, traditional SVC (static var compensator) mainly represented by thyristor controlled reactors TCR (thyristor controlled reactor) and the like, the SVG has incomparable advantages
According to an embodiment of the present application, there is provided an embodiment of a method for controlling a new energy station, where the steps shown in the flowchart of the drawings may be executed in a computer system, such as a set of computer executable instructions, and where a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in an order different from the order shown.
Fig. 1 is a control method of a new energy station according to an embodiment of the present application, as shown in fig. 1, the method includes the following steps:
step S102, determining first reactive current regulation capacity of power generation equipment in a power generation state in a target new energy station, wherein the first reactive current regulation capacity is the residual reactive current regulation capacity of the target new energy station;
step S104, acquiring a second reactive current regulation capacity currently required by the target new energy station;
step S106, comparing the first reactive current regulation capacity with the second reactive current regulation capacity;
and S108, executing a steady-state control strategy corresponding to the comparison result according to the comparison result, wherein the steady-state control strategy is used for determining whether to control the static var generator SVG to adjust the first reactive current regulation capacity and/or the second reactive current regulation capacity.
The control method of the new energy station comprises the steps of firstly, determining first reactive current regulation capacity of power generation equipment in a power generation state in a target new energy station, wherein the first reactive current regulation capacity is the residual reactive current regulation capacity of the target new energy station; then, acquiring a second reactive current regulation capacity currently required by the target new energy station; comparing the first reactive current regulation capacity with the second reactive current regulation capacity; and finally, executing a steady-state control strategy corresponding to the comparison result according to the comparison result, wherein the steady-state control strategy is used for determining whether to control the Static Var Generator (SVG) to adjust the first reactive current regulation capacity and/or the second reactive current regulation capacity so as to achieve the purpose of executing the control strategy corresponding to the comparison result, thereby achieving the technical effect of avoiding that the whole process of the SVG participates in current capacity regulation to cause large power loss of the SVG or the whole regulation capacity of the new energy field station cannot be fully exerted, and further solving the technical problem that the whole regulation capacity of the new energy field station cannot be exerted or the whole process of the SVG is put into operation to cause overlarge power loss of the SVG in the related technology due to the fact that the SVG does not coordinate with the new energy field station.
In some optional embodiments of the present application, a steady-state control strategy corresponding to the comparison result may be executed according to the comparison result, specifically: when the comparison result shows that the first reactive current regulation capacity is larger than the second reactive current regulation capacity; executing a steady-state control strategy corresponding to the comparison result; wherein the steady state control strategy is that the target new energy station adjusts the second reactive power regulation capacity, and as can be understood, the first reactive current regulation capacity is the regulation capacity (real-time reactive current regulation capacity) of the new energy station, the second reactive current regulation capacity is the regulation demand from the power system,
in other alternative embodiments of the present application, a steady-state control strategy corresponding to the comparison result may be executed according to the comparison result, specifically: when the comparison result shows that the first reactive current regulation capacity is smaller than the second reactive current regulation capacity, calculating a difference value between the second reactive current regulation capacity and the first reactive current regulation capacity; executing a steady-state control strategy corresponding to the comparison result; wherein, the steady state control strategy is to adjust the first reactive current regulation capacity by a target new energy station, and adjust the difference value by a static var generator SVG, wherein the static var generator SVG is positioned in the target new energy station and connected with the target new energy station, FIG. 2 is a flow chart of the method for judging regulation capacity and regulation demand, which can be selected, as shown in FIG. 2, the flow process comprises the steps of calculating the real-time reactive current regulation capacity of new energy power generation in the current station, calculating the current reactive regulation demand according to AVC, then judging the size relationship between the demand (the current reactive regulation demand) and the capacity (the real-time reactive current regulation capacity), when the demand is larger than the capacity, distributing the instruction to the new energy (station) and the SVG for combined regulation, when the demand is smaller than the capacity, sending the instruction to the new energy monitoring system, and the power generation is regulated by the new energy station.
It should be noted that, when the target new energy power station is in transient disturbance, the control strategy corresponding to the transient disturbance is to perform closed-loop regulation on the output of the SVG, and it should be noted that, when a voltage V occurs, the control strategy is to perform closed-loop regulation on the output of the SVGERRAnd when the voltage is disturbed below 0.9pu and is higher than 1.1pu, the SVG is in reactive current control.
The output of the SVG can be closed-loop regulated by:
wherein, IQIs the output of SVG, wherein the output is a given value of reactive current, VrefIs a voltage set value, VactIs a voltage feedback value, KPFor proportional control coefficients, T1、T2Respectively, a lead correction coefficient and a lag correction coefficient, and fig. 3 is a schematic diagram of the closed-loop regulation of the output of SVG as described above.
In some embodiments of the present application, the first reactive current regulation capacity of the power generation equipment in the power generation state in the target new energy site may be determined by: obtaining rated active power in the target new energy station and rated power factors of power generation equipment; acquiring total active power, total reactive power and multi-machine equivalent voltage in a target new energy station; and determining the first reactive current regulation capacity of the power generation equipment in the target new energy station in the power generation state according to the rated active power, the rated power factor, the total active power, the total reactive power and the multi-machine equivalent voltage.
In some embodiments of the present application, a first reactive current regulation capacity of a power generation device in a power generation state in a target new energy site may be determined according to a rated active power, a rated power factor, a total active power, a total reactive power, and a multi-machine equivalent voltage, and specifically, the first reactive current regulation capacity may be determined by the following formula:
wherein, IQGFor the first reactive current regulating capacity, PNRated active power in the new energy station, thetaNIs the rated power factor, P, of the power plantACTIs the total active power, QACTAs total reactive power, VACTThe voltage is equivalent to a plurality of voltages.
Fig. 4 is a control device of a new energy station according to an embodiment of the present application, and as shown in fig. 4, the control device includes:
the determining module 40 is configured to determine a first reactive current regulation capacity of the power generation equipment in the target new energy station in the power generation state, where the first reactive current regulation capacity is a remaining reactive current regulation capacity of the target new energy station;
the obtaining module 42 is configured to obtain a second reactive current regulation capacity currently required by the target new energy station;
a comparison module 44, configured to compare the first reactive current regulation capacity with the second reactive current regulation capacity;
and an executing module 46, configured to execute a steady-state control strategy corresponding to the comparison result according to the comparison result, where the steady-state control strategy is used to determine whether to control the static var generator SVG to adjust the first reactive current regulation capacity and/or the second reactive current regulation capacity.
In the control device of the new energy station, a determining module 40 is used for determining a first reactive current regulating capacity of power generation equipment in a power generation state in a target new energy station, wherein the first reactive current regulating capacity is the residual reactive current regulating capacity of the target new energy station; the obtaining module 42 is configured to obtain a second reactive current regulation capacity currently required by the target new energy station; a comparison module 44, configured to compare the first reactive current regulation capacity with the second reactive current regulation capacity; and an executing module 46, configured to execute a steady-state control policy corresponding to the comparison result according to the comparison result, where the steady-state control policy is used to determine whether to control the static var generator SVG to adjust the first reactive current regulation capacity and/or the second reactive current regulation capacity, so as to achieve a purpose of executing the control policy corresponding to the comparison result, thereby achieving a technical effect of avoiding that the power loss of the new energy station is large or all regulation capabilities of the new energy station are not fully exerted due to participation of the SVG in current capacity regulation in the overall process, and further solving a technical problem that the power loss of the new energy station is not fully exerted or the SVG is put into the overall process due to uncoordinated operation of the SVG and the new energy station in the related art.
In some optional embodiments of the present application, a steady-state control strategy corresponding to the comparison result may be executed according to the comparison result, specifically: when the comparison result shows that the first reactive current regulation capacity is larger than the second reactive current regulation capacity; executing a steady-state control strategy corresponding to the comparison result; wherein the steady state control strategy is that the target new energy station adjusts the second reactive power regulation capacity, and as can be understood, the first reactive current regulation capacity is the regulation capacity (real-time reactive current regulation capacity) of the new energy station, the second reactive current regulation capacity is the regulation demand from the power system,
in other alternative embodiments of the present application, a steady-state control strategy corresponding to the comparison result may be executed according to the comparison result, specifically: when the comparison result shows that the first reactive current regulation capacity is smaller than the second reactive current regulation capacity, calculating a difference value between the second reactive current regulation capacity and the first reactive current regulation capacity; executing a steady-state control strategy corresponding to the comparison result; the steady-state control strategy is characterized in that the first reactive current regulation capacity is regulated by the target new energy station, and the difference value is regulated by the Static Var Generator (SVG), wherein the SVG is located in the target new energy station and is connected with the target new energy station.
According to another aspect of the embodiments of the present application, there is also provided a non-volatile storage medium, where the non-volatile storage medium includes a stored program, and where the program is executed to control a device in which the non-volatile storage medium is located to execute any one of the control methods of the new energy station.
The storage medium is used for storing program instructions for executing the following functions, namely determining first reactive current regulation capacity of power generation equipment in a power generation state in a target new energy station, wherein the first reactive current regulation capacity is the residual reactive current regulation capacity of the target new energy station; acquiring a second reactive current regulation capacity currently required by the target new energy station; comparing the first reactive current regulation capacity with the second reactive current regulation capacity; and executing a steady-state control strategy corresponding to the comparison result according to the comparison result, wherein the steady-state control strategy is used for determining whether to control the static var generator SVG to adjust the first reactive current adjusting capacity and/or the second reactive current adjusting capacity.
According to another aspect of the embodiments of the present application, there is also provided a processor, where the processor is configured to execute a program, where the program executes any one of the control methods of the new energy station when running.
Specifically, the processor is configured to call a program instruction in the memory, and implement the following functions: determining a first reactive current regulation capacity of power generation equipment in a power generation state in the target new energy station, wherein the first reactive current regulation capacity is the residual reactive current regulation capacity of the target new energy station; acquiring a second reactive current regulation capacity currently required by the target new energy station; comparing the first reactive current regulation capacity with the second reactive current regulation capacity; and executing a steady-state control strategy corresponding to the comparison result according to the comparison result, wherein the steady-state control strategy is used for determining whether to control the static var generator SVG to adjust the first reactive current adjusting capacity and/or the second reactive current adjusting capacity.
The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present application, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present application and it should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.
Claims (10)
1. A control method of a new energy station is characterized by comprising the following steps:
determining a first reactive current regulation capacity of power generation equipment in a power generation state in a target new energy station, wherein the first reactive current regulation capacity is a residual reactive current regulation capacity of the target new energy station;
acquiring a second reactive current regulation capacity currently required by the target new energy station;
comparing the first reactive current regulation capacity with the second reactive current regulation capacity;
and executing a steady-state control strategy corresponding to the comparison result according to the comparison result, wherein the steady-state control strategy is used for determining whether to control a Static Var Generator (SVG) to adjust the first reactive current regulation capacity and/or the second reactive current regulation capacity.
2. The method of claim 1, wherein executing the steady-state control strategy corresponding to the comparison result according to the comparison result comprises:
when the comparison result shows that the first reactive current regulation capacity is larger than the second reactive current regulation capacity;
executing a steady-state control strategy corresponding to the comparison result;
and the steady-state control strategy is that the target new energy station adjusts the second reactive power adjusting capacity.
3. The method of claim 1, wherein a steady-state control strategy corresponding to the comparison is executed based on the comparison, the method further comprising:
when the comparison result shows that the first reactive current regulation capacity is smaller than the second reactive current regulation capacity, calculating a difference value between the second reactive current regulation capacity and the first reactive current regulation capacity;
executing a steady-state control strategy corresponding to the comparison result;
and the steady-state control strategy is that the target new energy station adjusts the first reactive current adjusting capacity, and a Static Var Generator (SVG) adjusts the difference, wherein the SVG is positioned in the target new energy station and is connected with the target new energy station.
4. The method of claim 3, wherein when the target new energy power station is in transient disturbance, the control strategy corresponding to the transient disturbance is to perform closed-loop regulation on the output of the SVG.
5. The method of claim 4, wherein the output of the SVG is closed-loop regulated by:
wherein, IQIs the output of the SVG, wherein the output is a given value of reactive current, VrefIs a voltage set value, VactIs a voltageFeedback value, KPFor proportional control coefficients, T1、T2The correction coefficients are a lead correction coefficient and a lag correction coefficient.
6. The method of claim 1, wherein determining a first reactive current regulating capacity of the power generation equipment in the generating state within the target new energy farm comprises:
obtaining rated active power in the target new energy station and rated power factors of the power generation equipment;
acquiring total active power, total reactive power and multi-machine equivalent voltage in a target new energy station;
and determining the first reactive current regulation capacity of the power generation equipment in the target new energy station in the power generation state according to the rated active power, the rated power factor, the total active power, the total reactive power and the multi-machine equivalent voltage.
7. The method of claim 6, wherein determining the first reactive current regulation capacity of the power generation equipment in the power generation state within the target new energy site from the rated active power, the rated power factor, the total active power, the total reactive power, and the multi-machine equivalent voltage comprises:
determining the first reactive current regulating capacity by the formula:
wherein, IQGAdjusting the capacity, P, for said first reactive currentNIs rated active power in the new energy station, thetaNIs the rated power factor, P, of the power plantACTIs the total active power, QACTFor said total reactive power, VACTThe voltage is the equivalent voltage of the plurality of units.
8. A control device of a new energy station is characterized by comprising:
the determination module is used for determining a first reactive current regulation capacity of power generation equipment in a power generation state in a target new energy station, wherein the first reactive current regulation capacity is the residual reactive current regulation capacity of the target new energy station;
the acquisition module is used for acquiring a second reactive current regulation capacity currently required by the target new energy station;
the comparison module is used for comparing the first reactive current regulation capacity with the second reactive current regulation capacity;
and the execution module is used for executing a steady-state control strategy corresponding to the comparison result according to the comparison result, wherein the steady-state control strategy is used for determining whether to control the SVG to adjust the first reactive current regulation capacity and/or the second reactive current regulation capacity.
9. A non-volatile storage medium, comprising a stored program, wherein when the program is executed, the non-volatile storage medium is controlled to execute a control method of the new energy station according to any one of claims 1 to 7.
10. A processor, characterized in that the processor is configured to run a program, wherein the program is configured to execute the method for controlling a new energy station according to any one of claims 1 to 7 when running.
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