CN115864488A - Method and device for testing adaptability of photovoltaic power station to be connected into new energy power transmission system - Google Patents
Method and device for testing adaptability of photovoltaic power station to be connected into new energy power transmission system Download PDFInfo
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Abstract
The method comprises the steps of obtaining the electrical distance between each photovoltaic power station and a transmitting end converter station, and sequencing all photovoltaic power stations in a transmitting end new energy power grid according to the electrical distance to obtain a photovoltaic power station set; controlling the photovoltaic power stations to operate one by one according to the sequence of the photovoltaic power station set, and acquiring alternating voltage of each node of the new energy power grid at the sending end; judging whether the alternating voltage of each node meets the operation condition one by one, and if so, judging whether the new energy power grid at the sending end oscillates according to the alternating voltage of the node corresponding to the operation of the photovoltaic power station; if oscillation does not exist, completing the adaptability test of the photovoltaic power station; if oscillation exists, the photovoltaic power station is locked and an oscillation list is generated. The method realizes the adaptability test of the photovoltaic power station accessed to the new energy power transmission system, so that the photovoltaic power station accessed to the new energy power transmission system can stably operate.
Description
Technical Field
The application relates to the technical field of new energy power transmission terminals, in particular to a method, a device and equipment for testing adaptability of a photovoltaic power station to be connected into a new energy power transmission system.
Background
The solar energy resource of plateau areas is abundant, the new energy permeability is gradually improved along with the construction of a novel power system, the photovoltaic resource of plateau areas is gradually developed on a large scale, and the abundant photovoltaic resource of plateau areas is transmitted to the load center of east power transmission through a new energy power transmission system.
Due to the characteristics of large scale and scattered distribution of photovoltaic power generation units in plateau areas, long lines exist among sending-end photovoltaic power station clusters of the new energy power transmission system, and other conventional power supplies are small in scale and different from the existing new energy sending scene characteristics. The large-scale photovoltaic access power transmission system is important for controlling the power transmission system to operate stably, so that the adaptability of a photovoltaic power generation unit of the power transmission system in an application scene needs to be tested; at present, no condition for carrying out field test on the adaptability of the photovoltaic power generation unit of the new energy power transmission system exists.
Disclosure of Invention
The embodiment of the application provides a method, a device and equipment for testing the adaptability of a photovoltaic power generation station to a new energy power transmission system, and is used for solving the technical problem that the existing field test mode for the adaptability of a photovoltaic power generation unit of the new energy power transmission system does not exist.
In order to achieve the above object, the embodiments of the present application provide the following technical solutions:
a method for testing adaptability of a photovoltaic power station accessed to a new energy power transmission system comprises a sending-end new energy power grid, a sending-out flexible direct current power transmission system and a receiving-end power grid which are sequentially connected, wherein the sending-out flexible direct current power transmission system comprises a sending-end converter station, a receiving-end converter station and a linear line connected between the sending-end converter station and the receiving-end converter station, the sending-end new energy power grid comprises a plurality of photovoltaic power stations with photovoltaic power generation units, and the method for testing adaptability of the photovoltaic power stations accessed to the new energy power transmission system comprises the following steps:
s10, acquiring an electrical distance between each photovoltaic power station and a sending end converter station, and sequencing all photovoltaic power stations in a sending end new energy power grid according to the electrical distance to obtain a sequenced photovoltaic power station set;
s20, controlling the photovoltaic power stations to operate one by one according to the sequence of the photovoltaic power station set, and acquiring alternating voltage of each node of the new energy power grid at the sending end;
s30, judging whether the alternating voltage of each corresponding node meets the operation condition one by one according to the operation of the photovoltaic power station, and if so, judging whether the new energy power grid at the sending end oscillates according to the alternating voltage of the node corresponding to the operation of the photovoltaic power station; if the oscillation does not exist in the sending-end new energy power grid, completing the adaptability test of the photovoltaic power station; and if the new energy power grid at the sending end oscillates, locking the photovoltaic power station and generating an oscillation list.
Preferably, the method for testing the adaptability of the photovoltaic power station to access the new energy transmission system comprises the following steps: according to steps S20 and S30, all the photovoltaic power stations in the set of photovoltaic power stations are subjected to an adaptability test.
Preferably, the method for testing the adaptability of the photovoltaic power station to access the new energy transmission system comprises the following steps: and if the alternating voltage of each node does not meet the operation condition, adjusting the output level of the photovoltaic power station corresponding to the alternating voltage so that the alternating voltage of each node of the new energy power grid at the sending end corresponding to the adjusted operation of the photovoltaic power station meets the operation condition.
Preferably, the operation condition is an allowable operation voltage for operation of the sending-end new energy power grid.
Preferably, sorting all the photovoltaic power stations in the new energy power grid at the sending end according to the electrical distance, and obtaining a sorted photovoltaic power station set includes: and sequencing all the photovoltaic power stations in the new energy power grid at the sending end according to the electrical distance from near to far to obtain a sequenced photovoltaic power station set.
The application also provides an adaptability testing device for the photovoltaic power station to be connected into the new energy power transmission system, the photovoltaic power station to be connected into the new energy power transmission system comprises a sending end new energy power grid, a sending flexible direct current power transmission system and a receiving end power grid which are sequentially connected, the sending end flexible direct current power transmission system comprises a sending end converter station, a receiving end converter station and a linear line connected between the sending end converter station and the receiving end converter station, the sending end new energy power grid comprises a plurality of photovoltaic power stations with photovoltaic power generation units, and the adaptability testing device for the photovoltaic power station to be connected into the new energy power transmission system comprises a sequencing module, a data acquisition module and a testing and judging module;
the sequencing module is used for acquiring the electrical distance between each photovoltaic power station and the sending-end converter station, and sequencing all photovoltaic power stations in the sending-end new energy power grid according to the electrical distance to obtain a sequenced photovoltaic power station set;
the data acquisition module is used for controlling the photovoltaic power stations to operate one by one according to the sequence of the photovoltaic power station set and acquiring alternating voltage of each node of the new energy power grid at the sending end;
the test judgment module is used for judging whether the alternating voltage of each corresponding node meets the operation condition one by one according to the operation of the photovoltaic power station, and if so, judging whether the new energy power grid at the sending end oscillates according to the alternating voltage of the node corresponding to the operation of the photovoltaic power station; if the oscillation does not exist in the sending-end new energy power grid, completing the adaptability test of the photovoltaic power station; and if the new energy power grid at the sending end oscillates, locking the photovoltaic power station and generating an oscillation list.
Preferably, the test judgment module is further configured to adjust the output level of the photovoltaic power plant corresponding to the alternating voltage according to that the alternating voltage of each node does not satisfy the operating condition, so that the alternating voltage of each node of the new energy grid at the sending end corresponding to the adjusted operation of the photovoltaic power plant satisfies the operating condition.
Preferably, the sorting module is further configured to sort all photovoltaic power plants in the new energy grid at the sending end according to the electrical distance from near to far, so as to obtain a sorted photovoltaic power plant set.
The application further provides a storage device, wherein a plurality of program codes are stored, and the program codes are suitable for being loaded and executed by a processor to execute the adaptability test method for the photovoltaic power station to access the new energy transmission system.
The application also provides a terminal device, which comprises a processor and a memory;
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is used for executing the adaptability test method for the photovoltaic power station to access the new energy power transmission system according to the instructions in the program codes.
According to the technical scheme, the embodiment of the application has the following advantages: the method, the device and the equipment for testing the adaptability of the photovoltaic power station to access a new energy power transmission system are characterized in that the photovoltaic power station to access the new energy power transmission system comprises a sending end new energy power grid, a sending-out flexible direct current power transmission system and a receiving end power grid which are sequentially connected, the sending-out flexible direct current power transmission system comprises a sending end converter station, a receiving end converter station and a linear line connected between the sending end converter station and the receiving end converter station, and the sending end new energy power grid comprises a plurality of photovoltaic power stations with photovoltaic power generation units. The method comprises the steps of obtaining the electrical distance between each photovoltaic power station and a sending end converter station, and sequencing all photovoltaic power stations in a sending end new energy power grid according to the electrical distance to obtain a sequenced photovoltaic power station set; controlling the photovoltaic power stations to operate one by one according to the sequence of the photovoltaic power station set, and acquiring alternating voltage of each node of the new energy power grid at the sending end; judging whether the alternating voltage of each corresponding node meets the operation condition one by one according to the operation of the photovoltaic power station, and judging whether the new energy power grid at the sending end oscillates according to the alternating voltage of the node corresponding to the operation of the photovoltaic power station if the alternating voltage meets the operation condition; if the oscillation does not exist in the new energy power grid at the sending end, the adaptability test of the photovoltaic power station is completed; and if the new energy power grid at the sending end oscillates, locking the photovoltaic power station and generating an oscillation list. By the adaptability test method for the photovoltaic power station to be connected into the new energy power transmission system, the adaptability test of the photovoltaic power station to be connected into the new energy power transmission system is realized, the photovoltaic power station which passes the test can be stably operated when being connected into the new energy power transmission system, and the technical problem that the existing field test mode for the adaptability of the photovoltaic power generation unit of the new energy power transmission system is unavailable is solved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a flowchart illustrating steps of a method for testing adaptability of a photovoltaic power generation station to a new energy transmission system according to an embodiment of the present application;
fig. 2 is a frame diagram of a photovoltaic power generation station accessing a new energy transmission system in a method for testing adaptability of the photovoltaic power generation station accessing the new energy transmission system according to the embodiment of the present application;
fig. 3 is a frame diagram of an adaptability test device for a photovoltaic power generation station to access a new energy transmission system according to an embodiment of the present application.
Detailed Description
In order to make the objects, features and advantages of the present invention more apparent and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the embodiments described below are only a part of the embodiments of the present application, and not all of the 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.
The embodiment of the application provides a method, a device and equipment for testing the adaptability of a photovoltaic power generation station to a new energy power transmission system, and is used for solving the technical problem that the existing field test mode for the adaptability of a photovoltaic power generation unit of the new energy power transmission system does not exist.
The first embodiment is as follows:
fig. 1 is a flowchart illustrating steps of a method for testing adaptability of a photovoltaic power station to access a new energy power transmission system according to an embodiment of the present application, and fig. 2 is a block diagram illustrating a method for testing adaptability of a photovoltaic power station to access a new energy power transmission system according to an embodiment of the present application.
As shown in fig. 2, an embodiment of the present application provides an adaptability testing method for a photovoltaic power station to access a new energy transmission system, where the photovoltaic power station to access the new energy transmission system includes a sending-end new energy power grid 10, a sending-out flexible direct current transmission system 20, and a receiving-end power grid 30 that are connected in sequence, the sending-out flexible direct current transmission system includes a sending-end converter station, a receiving-end converter station, and a linear line connected between the sending-end converter station and the receiving-end converter station, and the sending-end new energy power grid includes a plurality of photovoltaic power stations with photovoltaic power generation units.
It should be noted that the new energy grid at the sending end is built according to the actual planning situation, the length of each long line between every two photovoltaic power stations is dozens of km, and the lines cause uneven voltage distribution of each photovoltaic power station, which brings problems to grid connection of the photovoltaic power generation units. The photovoltaic power station is connected into a new energy power transmission system, and real-time simulation can be carried out by adopting an RTDS simulation platform to obtain a simulation model. In a simulation model of a photovoltaic power generation station accessed to a new energy power transmission system, a typical system topology and a typical control structure are adopted for a photovoltaic power generation unit of a flexible direct current power transmission system and the photovoltaic power generation station, a transmitting end converter station is controlled by V-F, a receiving end converter station is controlled by UDC-Q, the photovoltaic power generation unit is controlled by a classical net-following type double ring, and the photovoltaic power generation station is subjected to equivalent modeling by a power weighting method and an equal loss method. And the new energy power grid line at the sending end is built by adopting a Bergeron model according to an actual structure.
As shown in fig. 1, the method for testing the adaptability of the photovoltaic power station to access the new energy transmission system includes the following steps:
s10, obtaining the electrical distance between each photovoltaic power station and the sending end converter station, and sequencing all photovoltaic power stations in the sending end new energy power grid according to the electrical distance to obtain a sequenced photovoltaic power station set.
It should be noted that, in step S10, firstly, the electrical distance between each photovoltaic power station and the sending-end converter station in the new energy transmission system accessed by the photovoltaic power stations is obtained, and secondly, all the photovoltaic power stations are sorted according to the electrical distance, so as to obtain a photovoltaic power station set.
Further, sequencing all photovoltaic power stations in the new energy power grid of the sending end according to the electrical distance, and obtaining a sequenced photovoltaic power station set comprises: and sequencing all the photovoltaic power stations in the new energy power grid at the sending end according to the electrical distance from near to far to obtain a sequenced photovoltaic power station set.
And S20, controlling the photovoltaic power stations to operate one by one according to the sequence of the photovoltaic power station set, and acquiring the alternating voltage of each node of the new energy power grid at the sending end.
It should be noted that, in step S20, the first photovoltaic power station is unlocked one by one (that is, the photovoltaic power stations are controlled to operate) according to the sequence of the photovoltaic power station set, and each time one photovoltaic power station is unlocked, the ac voltage of each node of the new energy grid at the sending end is obtained.
S30, judging whether the alternating voltage of each corresponding node meets the operation condition one by one according to the operation of the photovoltaic power station, and judging whether the new energy power grid at the sending end oscillates according to the alternating voltage of the node corresponding to the operation of the photovoltaic power station if the alternating voltage meets the operation condition; if the oscillation does not exist in the sending-end new energy power grid, completing the adaptability test of the photovoltaic power station; and if the new energy power grid at the sending end oscillates, locking the photovoltaic power station and generating an oscillation list.
It should be noted that, in step S30, each time the ac voltage of each node of the sending-end new energy power grid is obtained, whether the ac voltage of each node meets the operation condition is determined, and only the ac voltage of each node meets the operation condition is determined, whether oscillation exists in the sending-end new energy power grid is determined again by the ac voltage of each node, and if the determination result is that oscillation does not exist in the sending-end new energy power grid, the adaptability test for unlocking a photovoltaic power plant is completed; and if the new energy power grid at the sending end oscillates, locking the photovoltaic power station and generating an oscillation list. In this embodiment, it is a mature technology in the field of industry to determine whether the new energy grid at the sending end oscillates through the ac voltage, and details thereof are not described herein, for example, the phenomena such as loss of synchronization or periodic oscillation occur. The operation condition is the allowable working voltage of the working of the new energy power grid at the sending end. The ac voltage at each node meets the operating condition that the ac voltage is within the allowable operating voltage range.
In the embodiment of the application, after the adaptability test is completed for the photovoltaic power station to access the new energy power transmission system, a model capable of outputting an oscillation list is obtained, and the operation condition of the photovoltaic power station to access the new energy power transmission system is known through the oscillation list.
Further, the adaptability test method for the photovoltaic power station to access the new energy transmission system comprises the following steps: and if the alternating voltage of each node does not meet the operation condition, adjusting the output level of the photovoltaic power station corresponding to the alternating voltage so that the alternating voltage of each node of the new energy power grid at the sending end corresponding to the adjusted operation of the photovoltaic power station meets the operation condition.
It should be noted that adjusting the output level of the photovoltaic power station corresponding to the ac voltage refers to adjusting the active power and the reactive power of the photovoltaic power station, so that the ac voltage of each node of the new energy power grid at the sending end is kept within an allowable working voltage range, the allowable working voltage is 0.97 pu-1.07pu, and pu is a voltage per unit value of the new energy power grid at the sending end.
Further, the adaptability test method for the photovoltaic power station to access the new energy transmission system comprises the following steps: and if the sending-end new energy power grid oscillates, locking the photovoltaic power generation station and recording the serial number of the photovoltaic power generation station.
The method for testing the adaptability of the photovoltaic power station to the new energy power transmission system can record the adaptability problem of the photovoltaic power generation unit of the photovoltaic power station to the new energy power transmission system in the operation process through the serial number of the photovoltaic power station which is unstable due to the oscillation record of the new energy power grid at the sending end, and provides technical support for further researching and adjusting the parameters of the photovoltaic power station to the new energy power transmission system to solve the adaptability problem.
According to the adaptability test method for the photovoltaic power station to be connected into the new energy power transmission system, the photovoltaic power station to be connected into the new energy power transmission system comprises a sending end new energy power grid, a sending out flexible direct current power transmission system and a receiving end power grid which are sequentially connected, the sending out flexible direct current power transmission system comprises a sending end converter station, a receiving end converter station and a linear line connected between the sending end converter station and the receiving end converter station, and the sending end new energy power grid comprises a plurality of photovoltaic power stations with photovoltaic power generation units. The method comprises the steps of obtaining the electrical distance between each photovoltaic power station and a sending end converter station, and sequencing all photovoltaic power stations in a sending end new energy power grid according to the electrical distance to obtain a sequenced photovoltaic power station set; controlling the photovoltaic power stations to operate one by one according to the sequence of the photovoltaic power station set, and acquiring alternating voltage of each node of the new energy power grid at the sending end; judging whether the alternating voltage of each corresponding node meets the operation condition one by one according to the operation of the photovoltaic power station, and judging whether the new energy power grid at the sending end oscillates according to the alternating voltage of the node corresponding to the operation of the photovoltaic power station if the alternating voltage meets the operation condition; if the oscillation does not exist in the sending-end new energy power grid, completing the adaptability test of the photovoltaic power station; and if the new energy power grid at the sending end oscillates, locking the photovoltaic power station and generating an oscillation list. By the adaptability test method for the photovoltaic power station to be connected into the new energy power transmission system, the adaptability test of the photovoltaic power station to be connected into the new energy power transmission system is realized, the photovoltaic power station which passes the test can be stably operated when being connected into the new energy power transmission system, and the technical problem that the existing field test mode for the adaptability of the photovoltaic power generation unit of the new energy power transmission system is unavailable is solved.
In an embodiment of the application, an adaptability test method for accessing a photovoltaic power generation station to a new energy transmission system includes: all photovoltaic power plants in the photovoltaic power plant set are subjected to an adaptability test according to steps S20 and S30.
It should be noted that, in the method for testing the adaptability of the photovoltaic power station to access the new energy power transmission system, the adaptability test of all the photovoltaic power stations in the sending-end new energy power grid is completed through step S20 and step S30.
Example two:
fig. 3 is a block diagram of an adaptability testing apparatus for a photovoltaic power generation station to access a new energy transmission system according to an embodiment of the present application.
As shown in fig. 3, an embodiment of the present application further provides an adaptability testing apparatus for a photovoltaic power station to access a new energy power transmission system, where the photovoltaic power station to access the new energy power transmission system includes a sending-end new energy power grid, a sending-out flexible direct current power transmission system, and a receiving-end power grid, the sending-out flexible direct current power transmission system includes a sending-end converter station, a receiving-end converter station, and a linear line connected between the sending-end converter station and the receiving-end converter station, the sending-end new energy power grid includes a plurality of photovoltaic power stations having photovoltaic power generation units, and the adaptability testing apparatus for the photovoltaic power station to access the new energy power transmission system includes a sorting module 100, a data obtaining module 200, and a test judging module 300;
the sequencing module 100 is used for acquiring an electrical distance between each photovoltaic power station and the sending-end converter station, and sequencing all photovoltaic power stations in the sending-end new energy power grid according to the electrical distance to obtain a sequenced photovoltaic power station set;
the data acquisition module 200 is used for controlling the photovoltaic power stations to operate one by one according to the sequence of the photovoltaic power station set and acquiring the alternating voltage of each node of the new energy power grid at the sending end;
the test judgment module 300 is used for judging whether the alternating voltage of each corresponding node meets the operation condition one by one according to the operation of the photovoltaic power station, and if so, judging whether the new energy power grid at the sending end oscillates according to the alternating voltage of the node corresponding to the operation of the photovoltaic power station; if the oscillation does not exist in the sending-end new energy power grid, completing the adaptability test of the photovoltaic power station; and if the new energy power grid at the sending end oscillates, locking the photovoltaic power station and generating an oscillation list.
In this embodiment of the application, the test judgment module 300 is further configured to adjust the output level of the photovoltaic power plant corresponding to the ac voltage according to that the ac voltage of each node does not satisfy the operating condition, so that the ac voltage of each node of the new energy grid at the sending end corresponding to the adjusted operation of the photovoltaic power plant satisfies the operating condition.
In this embodiment of the application, the sorting module 100 is further configured to sort all photovoltaic power plants in the sending-end new energy power grid according to the electrical distance and from near to far, so as to obtain a sorted photovoltaic power plant set.
It should be noted that the modules in the second embodiment correspond to the steps in the first embodiment, and the content of the method for testing the adaptability of the photovoltaic power plant to access the new energy transmission system is described in detail in the first embodiment, and the content of the modules in the second embodiment is not described in detail in this second embodiment.
Example three:
the embodiment of the application provides a storage device, wherein a plurality of program codes are stored, and the program codes are suitable for being loaded and executed by a processor to execute the adaptability test method for the photovoltaic power station to access the new energy power transmission system.
Example four:
the embodiment of the application provides terminal equipment, which comprises a processor and a memory;
a memory for storing the program code and transmitting the program code to the processor;
and the processor is used for executing the adaptability test method for the photovoltaic power station to access the new energy power transmission system according to the instructions in the program codes.
It should be noted that the processor is configured to execute the steps in the above-described embodiment of the method for testing the adaptability of the photovoltaic power plant to the new energy transmission system according to the instructions in the program code. Alternatively, the processor, when executing the computer program, implements the functions of each module/unit in each system/apparatus embodiment described above.
Illustratively, a computer program may be partitioned into one or more modules/units, which are stored in a memory and executed by a processor to accomplish the present application. One or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution of a computer program in a terminal device.
The terminal device may be a desktop computer, a notebook, a palm computer, a cloud server, or other computing devices. The terminal device may include, but is not limited to, a processor, a memory. Those skilled in the art will appreciate that the terminal device is not limited and may include more or fewer components than those shown, or some components may be combined, or different components, e.g., the terminal device may also include input output devices, network access devices, buses, etc.
The Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The storage may be an internal storage unit of the terminal device, such as a hard disk or a memory of the terminal device. The memory may also be an external storage device of the terminal device, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like provided on the terminal device. Further, the memory may also include both an internal storage unit of the terminal device and an external storage device. The memory is used for storing computer programs and other programs and data required by the terminal device. The memory may also be used for temporarily storing data that has been output or is to be output.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one type of logical functional division, and other divisions may be realized in practice, 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, devices or units, and may be in an electrical, mechanical 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 network 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 removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (10)
1. A method for testing adaptability of a photovoltaic power station to a new energy power transmission system comprises a sending-end new energy power grid, a sending-out flexible direct current power transmission system and a receiving-end power grid which are sequentially connected, wherein the sending-out flexible direct current power transmission system comprises a sending-end converter station, a receiving-end converter station and a linear line connected between the sending-end converter station and the receiving-end converter station, the sending-end new energy power grid comprises a plurality of photovoltaic power stations with photovoltaic power generation units, and the method for testing adaptability of the photovoltaic power station to the new energy power transmission system comprises the following steps:
s10, acquiring an electrical distance between each photovoltaic power station and a sending end converter station, and sequencing all photovoltaic power stations in a sending end new energy power grid according to the electrical distance to obtain a sequenced photovoltaic power station set;
s20, controlling the photovoltaic power stations to operate one by one according to the sequence of the photovoltaic power station set, and acquiring alternating voltage of each node of the new energy power grid at the sending end;
s30, judging whether the alternating voltage of each corresponding node meets the operation condition one by one according to the operation of the photovoltaic power station, and if so, judging whether the new energy power grid at the sending end oscillates according to the alternating voltage of the node corresponding to the operation of the photovoltaic power station; if the oscillation does not exist in the sending-end new energy power grid, completing the adaptability test of the photovoltaic power station; and if the new energy power grid at the sending end oscillates, locking the photovoltaic power station and generating an oscillation list.
2. The method for testing the adaptability of the photovoltaic power station to the new energy transmission system according to claim 1, is characterized by comprising the following steps: according to steps S20 and S30, all the photovoltaic power stations in the set of photovoltaic power stations are subjected to an adaptability test.
3. The method for testing adaptability of the photovoltaic power station to the new energy transmission system according to claim 1, characterized by comprising the following steps: and if the alternating voltage of each node does not meet the operation condition, adjusting the output level of the photovoltaic power station corresponding to the alternating voltage so that the alternating voltage of each node of the new energy power grid at the sending end corresponding to the adjusted operation of the photovoltaic power station meets the operation condition.
4. The method for testing the adaptability of the photovoltaic power station to the new energy transmission system according to claim 1, wherein the operation condition is an allowable operation voltage for operation of a sending-end new energy power grid.
5. The method for testing the adaptability of the photovoltaic power stations to the new energy transmission system according to claim 1, wherein the step of sequencing all the photovoltaic power stations in the sending-end new energy power grid according to the electrical distance to obtain a sequenced photovoltaic power station set comprises the following steps: and sequencing all the photovoltaic power stations in the new energy power grid at the sending end according to the electrical distance from near to far to obtain a sequenced photovoltaic power station set.
6. A photovoltaic power station is connected with an adaptability testing device of a new energy power transmission system, the photovoltaic power station is connected with the new energy power transmission system and comprises a sending end new energy power grid, a sending flexible direct current power transmission system and a receiving end power grid which are connected in sequence, the sending end flexible direct current power transmission system comprises a sending end converter station, a receiving end converter station and a linear line connected between the sending end converter station and the receiving end converter station, the sending end new energy power grid comprises a plurality of photovoltaic power stations with photovoltaic power generation units, and the adaptability testing device of the photovoltaic power station connected with the new energy power transmission system comprises a sequencing module, a data acquisition module and a testing and judging module;
the sequencing module is used for acquiring the electrical distance between each photovoltaic power station and the sending-end converter station, and sequencing all the photovoltaic power stations in the sending-end new energy power grid according to the electrical distance to obtain a sequenced photovoltaic power station set;
the data acquisition module is used for controlling the photovoltaic power stations to operate one by one according to the sequence of the photovoltaic power station set and acquiring alternating voltage of each node of the new energy power grid at the sending end;
the test judgment module is used for judging whether the alternating voltage of each corresponding node meets the operation condition one by one according to the operation of the photovoltaic power station, and if so, judging whether the new energy power grid at the sending end oscillates according to the alternating voltage of the node corresponding to the operation of the photovoltaic power station; if the oscillation does not exist in the sending-end new energy power grid, completing the adaptability test of the photovoltaic power station; and if the new energy power grid at the sending end oscillates, locking the photovoltaic power station and generating an oscillation list.
7. The device for testing the adaptability of the photovoltaic power station to the new energy transmission system according to claim 6, wherein the test judgment module is further configured to adjust the output level of the photovoltaic power station corresponding to the alternating voltage according to the fact that the alternating voltage of each node does not satisfy the operation condition, so that the alternating voltage of each node of the new energy grid at the sending end corresponding to the adjusted operation of the photovoltaic power station satisfies the operation condition.
8. The device for testing the adaptability of the photovoltaic power stations to the new energy transmission system according to claim 6, wherein the sorting module is further configured to sort all the photovoltaic power stations in the sending-end new energy power grid from near to far according to the electrical distance to obtain a sorted photovoltaic power station set.
9. A storage means having stored therein a plurality of program codes, characterized in that the program codes are adapted to be loaded and run by a processor to execute a method of adaptability testing of a photovoltaic power plant according to any of claims 1-5 to access a new energy transmission system.
10. A terminal device comprising a processor and a memory;
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is used for executing the adaptability test method for accessing the photovoltaic power station to the new energy transmission system according to any one of claims 1 to 5 according to the instructions in the program code.
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| CN202211619881.6A CN115864488A (en) | 2022-12-15 | 2022-12-15 | Method and device for testing adaptability of photovoltaic power station to be connected into new energy power transmission system |
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