CN114759571A - Voltage regulating method, device, equipment and storage medium of wind power and energy storage combined system - Google Patents

Voltage regulating method, device, equipment and storage medium of wind power and energy storage combined system Download PDF

Info

Publication number
CN114759571A
CN114759571A CN202210463686.2A CN202210463686A CN114759571A CN 114759571 A CN114759571 A CN 114759571A CN 202210463686 A CN202210463686 A CN 202210463686A CN 114759571 A CN114759571 A CN 114759571A
Authority
CN
China
Prior art keywords
power
energy storage
wind turbine
turbine generator
wind
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.)
Pending
Application number
CN202210463686.2A
Other languages
Chinese (zh)
Inventor
陆秋瑜
郑建平
郑耀东
杨银国
闫斌杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Power Grid Co Ltd
Electric Power Dispatch Control Center of Guangdong Power Grid Co Ltd
Original Assignee
Guangdong Power Grid Co Ltd
Electric Power Dispatch Control Center of Guangdong Power Grid Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Guangdong Power Grid Co Ltd, Electric Power Dispatch Control Center of Guangdong Power Grid Co Ltd filed Critical Guangdong Power Grid Co Ltd
Priority to CN202210463686.2A priority Critical patent/CN114759571A/en
Publication of CN114759571A publication Critical patent/CN114759571A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
    • 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
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • 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
    • H02J3/381—Dispersed generators
    • 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
    • H02J2300/28—The renewable source being wind energy

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The application discloses a voltage regulating method, device, equipment and storage medium of a wind power energy storage combined system, which make up for power shortage by adding an energy storage unit, so that a grid-connected bus output power curve is stable, stable grid-connected operation of a wind power unit is facilitated, and dependence on rotating reserve capacity is reduced. Specifically, whether the wind turbine generator is in a power shortage state or not is determined by acquiring reactive power data output by the wind turbine generator; and when the wind turbine generator is in a power shortage state, determining the reactive power data to be compensated of the wind turbine generator according to the reactive power data, controlling the energy storage group to perform reactive compensation on the wind turbine generator, and adjusting the voltage of the wind turbine energy storage combined system, so that the reactive compensation of the energy storage group on the wind turbine generator is realized, and the stability of grid-connected operation of the wind turbine generator is ensured.

Description

Voltage regulating method, device, equipment and storage medium of wind power and energy storage combined system
Technical Field
The application relates to the technical field of power grid energy storage optimization, in particular to a voltage regulating method, device, equipment and storage medium of a wind power energy storage combined system.
Background
With the rapid development of offshore wind power, the proportion of wind power generation in a power supply is continuously increased. Due to output randomness and fluctuation of wind power generation, complexity of power balance and stable control of a power grid is increased to a certain extent, and operation reliability of a power grid system is reduced.
At present, when a power grid is disturbed to cause unstable voltage, power shortage easily occurs, and the wind power cannot be connected to the grid due to overlarge power shortage. Even grid-connected operation can result in wind power systems either abandoning part of the wind power or requiring large thermal power plant rotating reserve capacity to make up for the deficit. And at the moment, if the wind turbine generator with serious shortage continuously outputs active power and simultaneously bears reactive compensation, the wind turbine generator system may be broken down.
Disclosure of Invention
The application provides a voltage regulating method, a voltage regulating device, voltage regulating equipment and a voltage regulating storage medium of a wind power energy storage combined system, and aims to solve the technical problems that the voltage is unstable and the system is broken down due to the fact that power shortage easily occurs in the current wind power integration.
In order to solve the technical problem, in a first aspect, the application provides a voltage regulation method for a wind power and energy storage combined system, where the wind power and energy storage combined system includes a wind turbine generator and a plurality of energy storage groups, and the voltage regulation method includes:
acquiring reactive power data output by a wind turbine generator;
determining whether the wind turbine generator is in a power shortage state or not according to the reactive power data;
if the wind turbine generator is in a power shortage state, determining reactive power data to be compensated of the wind turbine generator according to the reactive power data;
and controlling the energy storage group to perform reactive compensation on the wind turbine generator based on the to-be-compensated reactive power data so as to regulate the voltage of the wind turbine energy storage combined system.
This application makes the generating line output power curve of being incorporated into the power networks steady through increasing the energy storage group in order to compensate the power shortage, is favorable to wind turbine generator's stable operation of being incorporated into the power networks more, reduces the reliance to the rotation reserve capacity simultaneously. Specifically, whether the wind turbine generator is in a power shortage state or not is determined by acquiring reactive power data output by the wind turbine generator; when the wind turbine generator is in a power shortage state, determining reactive power data to be compensated of the wind turbine generator according to the reactive power data, controlling the energy storage group to perform reactive compensation on the wind turbine generator so as to regulate the voltage of the wind turbine energy storage combined system, thereby realizing the reactive compensation of the energy storage group on the wind turbine generator and ensuring the stability of grid-connected operation of the wind turbine generator.
Preferably, the obtaining of the reactive power data output by the wind turbine includes:
when the wind turbine generator is in power shortage, current data of a grid-side converter in the q-axis direction are obtained, and the grid-side converter is used for connecting the wind turbine generator and a power grid so as to enable the output power of the wind turbine generator to flow into the power grid;
and determining reactive power data output by the wind turbine generator based on the current data.
Preferably, determining whether the wind turbine generator is in a power shortage state according to the reactive power data includes:
comparing the reactive power data with a preset planned power generation curve;
and if the reactive power data are smaller than the power data of the preset planned generating power curve, determining that the wind turbine generator is in a power shortage state.
Preferably, if the wind turbine is in a power shortage state, determining reactive power data to be compensated of the wind turbine according to the reactive power data, including:
if the wind turbine generator is in a power shortage state, calculating a difference value between planned output power of a power grid bus and reactive power data;
and determining the difference value as the to-be-compensated reactive power data of the wind turbine generator system.
Preferably, based on the reactive power data to be compensated, the energy storage group is controlled to perform reactive compensation on the wind turbine generator set so as to regulate the voltage of the wind turbine energy storage combined system, and the method comprises the following steps:
filtering the reactive power data to be compensated to remove high-frequency components in the reactive power data to be compensated to obtain a compensation power input value;
and if the compensation power input value is larger than the maximum output value of the energy storage group, controlling the energy storage group to perform reactive compensation on the wind turbine generator by using the maximum output value.
Preferably, the maximum output value is calculated based on a preset parameter, and the preset parameter is a preset power factor or reactive power regulated by the voltage of a common connection point of the wind power energy storage combined system.
Preferably, the energy storage group comprises a bidirectional converter and a storage battery, and the bidirectional converter is used for controlling active power and reactive power output by the storage battery.
The third aspect, this application provides a wind-powered electricity generation energy storage combined system's pressure regulating device, and wind-powered electricity generation energy storage combined system includes wind turbine generator system and a plurality of energy storage group, and pressure regulating device includes:
the acquisition module is used for acquiring reactive power data output by the wind turbine generator;
the first determining module is used for determining whether the wind turbine generator is in a power shortage state or not according to the reactive power data;
the second determination module is used for determining the reactive power data to be compensated of the wind turbine generator according to the reactive power data if the wind turbine generator is in the power shortage state;
and the control module is used for controlling the energy storage group to perform reactive compensation on the wind turbine generator based on the to-be-compensated reactive power data so as to regulate the voltage of the wind power energy storage combined system.
In a third aspect, the present application provides a computer device, including a processor and a memory, where the memory is used to store a computer program, and the computer program is executed by the processor to implement the voltage regulating method of the wind power and energy storage combined system according to the first aspect.
In a fourth aspect, the present application provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the voltage regulating method of the wind power and energy storage combined system according to the first aspect is implemented.
Please refer to the relevant description of the first aspect for the beneficial effects of the second to fourth aspects, which are not repeated herein.
Drawings
Fig. 1 is a schematic flow chart of a voltage regulating method of a wind power and energy storage combined system according to an embodiment of the present application;
FIG. 2 is a schematic structural diagram of a wind power and energy storage combined system shown in the embodiment of the application;
fig. 3 is a schematic structural diagram of a voltage regulating device of a wind power and energy storage combined system shown in the embodiment of the application;
fig. 4 is a schematic structural diagram of a computer device according to an embodiment of the present application.
Detailed Description
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 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.
As described in the related art, when the voltage is unstable due to disturbance of the grid, power shortage is likely to occur, and the wind power cannot be connected to the grid due to excessive power shortage. Even if the grid-connected operation is carried out, the wind power system abandons part of wind power or needs a large amount of thermal power rotating reserve capacity to make up for the deficient power. And at the moment, if the wind turbine generator with serious shortage continuously outputs active power and simultaneously bears reactive compensation, the wind turbine generator system may be broken down.
Therefore, the embodiment of the application provides a voltage regulation method of a wind power and energy storage combined system, and the energy storage group is added to make up for power shortage, so that a grid-connected bus output power curve is stable, stable grid-connected operation of a wind turbine generator is facilitated, and meanwhile, the dependence on rotation reserve capacity is reduced. Specifically, whether the wind turbine generator is in a power shortage state or not is determined by acquiring reactive power data output by the wind turbine generator; and when the wind turbine generator is in a power shortage state, determining reactive power data to be compensated of the wind turbine generator according to the reactive power data, controlling the energy storage group to perform reactive compensation on the wind turbine generator, and adjusting the voltage of the wind turbine energy storage combined system, so that the reactive compensation of the energy storage group on the wind turbine generator is realized, and the stability of grid-connected operation of the wind turbine generator is ensured.
Referring to fig. 1, fig. 1 is a schematic flow chart of a voltage regulating method of a wind power and energy storage combined system according to an embodiment of the present application. The voltage regulating method of the wind power and energy storage combined system can be applied to computer equipment, and the computer equipment comprises, but is not limited to, an integrated controller, a smart phone, a notebook computer, a tablet computer, a desktop computer, a physical server, a cloud server and other equipment. The wind power and energy storage combined system comprises a wind power generator set, a plurality of energy storage sets and computer equipment.
By way of example and not limitation, fig. 2 illustrates a schematic structural diagram of a wind power and energy storage combined system provided in an embodiment of the present application. As shown in fig. 2, the system further includes a dispatch center, a centralized controller, an execution station, and an energy storage controller. Optionally, the scheduling center is connected to the centralized controller, the centralized controller is connected to the wind turbine generator through the execution station, the centralized controller is connected to the energy storage group through the energy storage controller, and the energy storage group is disposed on a grid-connected point (i.e., an access point) of the wind turbine generator.
The method is described below in conjunction with a wind power and energy storage combined system. As shown in fig. 1, the voltage regulating method of the wind power and energy storage combined system of the embodiment includes steps S101 to S104, which are detailed as follows:
and S101, acquiring reactive power data output by the wind turbine generator.
In the step, the centralized controller receives an identification instruction issued by the dispatching center and issues the identification instruction to the energy storage group through the energy storage controller; receiving a reactive instruction issued by the dispatching center, issuing the reactive instruction to the wind turbine generator through the execution station and tracking the reactive instruction; the execution station feeds back the reactive power data output by the wind turbine generator to the centralized controller, and the data are uploaded to the dispatching center by the centralized controller to be displayed in real time.
And S102, determining whether the wind turbine generator is in a power shortage state or not according to the reactive power data.
In the step, the integrated controller compares reactive power data fed back by the execution station with the planned generating power, and when the reactive power data is smaller than the planned generating power, the wind turbine generator is determined to be in a power shortage state.
Step S103, if the wind turbine generator is in a power shortage state, determining reactive power data to be compensated of the wind turbine generator according to the reactive power data.
In this step, the centralized controller is further configured to issue the reactive instruction to the energy storage group through the energy storage controller;
the energy storage controller is used for receiving the state data of the energy storage group and uploading the state data to the dispatching center through the integrated controller; the dispatching center is used for obtaining reactive compensation quantity required to compensate the wind turbine generator according to the reactive power output by the wind turbine generator.
And S104, controlling the energy storage group to perform reactive compensation on the wind turbine generator set based on the to-be-compensated reactive power data so as to regulate the voltage of the wind power energy storage combined system.
In the step, the reactive power data to be compensated are combined with the state data of the energy storage sets, so that the plurality of energy storage sets perform reactive compensation on the wind turbine generator. Optionally, the energy storage group comprises a bidirectional converter and a storage battery, and the bidirectional converter is used for controlling active power and reactive power output by the storage battery.
It should be noted that the energy storage group of the present application can have different access modes according to different application scenarios, and can be divided into centralized energy storage and distributed energy storage. The centralized energy storage technology is characterized in that the whole energy storage system which is large in capacity and easy to control and install in a centralized mode is connected to an alternating current bus and is independently used as an energy supply unit to maintain the frequency and voltage stability of the alternating current bus; the distributed energy storage technology is characterized in that an energy storage system with relatively small capacity is dispersedly arranged on the direct current bus side or the load unit side of micro power supplies such as photovoltaic power supplies, wind power supplies and the like, and forms an energy supply unit together with each micro power supply or directly supplies power to a load.
Compared with the centralized energy storage technology, the distributed energy storage technology has the advantages that the control is simple, the geographical distribution is wide, the distributed energy storage technology is flexible and convenient, and the like, which are not possessed by the centralized energy storage technology, and can independently control and realize the function of 'plug and play'. Meanwhile, the distributed energy storage technology can respond to output fluctuation changes of the distributed power supplies in the network in time, and local compensation is rapidly achieved. In addition, the distributed energy storage technology can be divided into two system structures according to different access points, the energy storage units are directly connected to the direct current bus side of the micro source in parallel to support the direct current bus voltage, and the DC/AC converter is independently configured at the output end of the energy storage units and connected to the alternating current side of the micro source, so that the rapid and accurate tracking of the network side reference power is realized, meanwhile, the distributed control and adjustment of the output power of each distributed energy storage unit are realized, the respective power requirements are met, and the flexibility of the power scheduling of the whole distributed energy storage system is improved.
In an embodiment, based on the embodiment shown in fig. 1, the step S101 includes:
when the wind turbine generator is in power shortage, current data of a grid-side converter in a q-axis direction are obtained, and the grid-side converter is used for connecting the wind turbine generator and a power grid so as to enable output power of the wind turbine generator to flow into the power grid;
and determining reactive power data output by the wind turbine generator set based on the current data.
In this embodiment, the wind turbine is connected to the grid through a full-power grid-side converter, and the grid-side converter receives the reactive instruction and controls the active power and the reactive power of the wind turbine flowing into the grid.
Optionally, on the premise of direct-drive wind power generation, according to a mathematical model under a synchronous rotation coordinate system, active power P and reactive power Q of the grid-side converter controlling the wind turbine generator to flow into the power grid are respectively:
Figure BDA0003620899910000061
in the formula: u. ud，uq，id，iqThe voltage and the current of the grid-side converter in the d-axis direction and the q-axis direction are respectively;
the voltage direction of the selected power grid side is consistent with the d-axis direction of the reference coordinate system, uqWhen 0, then:
Figure BDA0003620899910000071
therefore, the power exchanged between the grid-side converter and the power grid is only equal to id，iq(ii) related;
according to given power factor and maximum current i of d-axis convertermaxObtaining the given value of the q-axis current, and controlling the current i of the grid-side converter in the q-axis directionqAnd obtaining the maximum output reactive power of the wind power plant.
In an embodiment, based on the embodiment shown in fig. 1, the step S102 includes:
comparing the reactive power data with a preset planned power generation curve;
and if the reactive power data are smaller than the power data of the preset planned generating power curve, determining that the wind turbine generator is in a power shortage state.
In the embodiment, the reactive power is output according to a planned generating power curve given by the dispatching center, the planned generating power curve is made based on the prediction of the wind speed and the wind power, and when the prediction is not accurate, the power shortage is generated between the actual generating power curve and the planned generating power curve.
In an embodiment, based on the embodiment shown in fig. 1, the step S103 includes:
if the wind turbine generator is in a power shortage state, calculating a difference value between planned output power of a power grid bus and the reactive power data;
and determining the difference as the to-be-compensated reactive power data of the wind turbine generator.
In this embodiment, the essence of the coordination control problem of the wind turbine generator and the energy storage bank is to calculate the power shortage of the bus, and the expression thereof is as follows:
P1＝ΔP＝Pd-Pw；
in the formula, P1For the output power of the energy storage pack, PdA planned output power for the bus; pwAnd delta P is actual output power of the wind turbine generator, and is reactive power data to be compensated.
In an embodiment, based on the embodiment shown in fig. 1, the step S104 includes:
filtering the reactive power data to be compensated to remove high-frequency components in the reactive power data to be compensated to obtain a compensation power input value;
and if the compensation power input value is larger than the maximum output value of the energy storage set, controlling the energy storage set to perform reactive compensation on the wind turbine generator set by using the maximum output value.
In the embodiment, in consideration of the response speed of the energy storage group and the capacity limit thereof, the high-frequency component is filtered out of the curve of the power shortage Δ P actually input to the energy storage group, and when the input value exceeds the maximum output capacity of the energy storage group, the energy storage group outputs according to the maximum value.
Optionally, the maximum output value is calculated based on a preset parameter, where the preset parameter is a preset power factor or a reactive power adjusted by a voltage of a common connection point of the wind power and energy storage combined system.
It should be noted that, this application makes up this power shortage through increasing the energy storage group and makes the output power curve of the generating line of being incorporated into the power networks steady, so both favorable to the stable operation of being incorporated into the power networks of offshore wind turbine generator system, has also reduced the reliance to the rotation reserve, and its environment and economic benefits are very obvious. In addition, the energy storage groups are provided with a plurality of energy storage groups, and when the reactive power output by part of the energy storage groups can meet the requirement of making up the power shortage, the rest energy storage groups do not work, so that the running times of the energy storage groups are effectively reduced, and the service life of the energy storage groups is prolonged.
In order to implement the voltage regulating method of the wind power and energy storage combined system corresponding to the method embodiment, corresponding functions and technical effects are achieved. Referring to fig. 3, fig. 3 shows a structural block diagram of a voltage regulating device of a wind power and energy storage combined system provided by the embodiment of the present application. For convenience of explanation, only the parts related to the present embodiment are shown, and the voltage regulating device of the wind power and energy storage combined system provided in the embodiment of the present application includes:
an obtaining module 301, configured to obtain reactive power data output by the wind turbine generator;
a first determining module 302, configured to determine whether the wind turbine generator is in a power shortage state according to the reactive power data;
a second determining module 303, configured to determine, according to the reactive power data, to-be-compensated reactive power data of the wind turbine generator if the wind turbine generator is in a power shortage state;
and the control module 304 is used for controlling the energy storage group to perform reactive compensation on the wind turbine generator based on the to-be-compensated reactive power data so as to regulate the voltage of the wind power energy storage combined system.
In an embodiment, the obtaining module 301 is specifically configured to:
when the wind turbine generator is in power shortage, current data of a grid-side converter in a q-axis direction are obtained, and the grid-side converter is used for connecting the wind turbine generator and a power grid so as to enable output power of the wind turbine generator to flow into the power grid;
and determining reactive power data output by the wind turbine generator set based on the current data.
In an embodiment, the first determining module 302 is specifically configured to:
comparing the reactive power data with a preset planned power generation curve;
and if the reactive power data are smaller than the power data of the preset planned generating power curve, determining that the wind turbine generator is in a power shortage state.
In an embodiment, the second determining module 303 is specifically configured to:
if the wind turbine generator is in a power shortage state, calculating a difference value between planned output power of a power grid bus and the reactive power data;
and determining the difference as the to-be-compensated reactive power data of the wind turbine generator.
In an embodiment, the control module 304 is specifically configured to:
filtering the reactive power data to be compensated to remove high-frequency components in the reactive power data to be compensated to obtain a compensation power input value;
and if the compensation power input value is larger than the maximum output value of the energy storage group, controlling the energy storage group to perform reactive power compensation on the wind turbine generator by using the maximum output value.
Optionally, the maximum output value is calculated based on a preset parameter, where the preset parameter is a preset power factor or reactive power adjusted by a voltage of a common connection point of the wind power and energy storage combined system.
In one embodiment, the energy storage group comprises a bidirectional converter and a storage battery, wherein the bidirectional converter is used for controlling active power and reactive power output by the storage battery.
The voltage regulating device of the wind power energy storage combined system can implement the voltage regulating method of the wind power energy storage combined system of the embodiment of the method. The alternatives in the above-described method embodiments are also applicable to this embodiment and will not be described in detail here. The rest of the embodiments of the present application may refer to the contents of the above method embodiments, and in this embodiment, details are not described again.
Fig. 4 is a schematic structural diagram of a computer device according to an embodiment of the present application. As shown in fig. 4, the computer device 4 of this embodiment includes: at least one processor 40 (only one shown in fig. 4), a memory 41, and a computer program 42 stored in the memory 41 and executable on the at least one processor 40, the processor 40 implementing the steps of any of the method embodiments described above when executing the computer program 42.
The computer device 4 may be a computing device such as a smart phone, a tablet computer, a desktop computer, and a cloud server. The computer device may include, but is not limited to, a processor 40, a memory 41. Those skilled in the art will appreciate that fig. 4 is merely an example of the computer device 4 and does not constitute a limitation of the computer device 4, and may include more or less components than those shown, or combine certain components, or different components, such as input output devices, network access devices, etc.
The Processor 40 may be a Central Processing Unit (CPU), and the Processor 40 may be 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 device, discrete hardware component, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 41 may in some embodiments be an internal storage unit of the computer device 4, such as a hard disk or a memory of the computer device 4. The memory 41 may also be an external storage device of the computer device 4 in other embodiments, 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, which are provided on the computer device 4. Further, the memory 41 may also include both an internal storage unit and an external storage device of the computer device 4. The memory 41 is used for storing an operating system, an application program, a BootLoader (BootLoader), data, and other programs, such as program codes of the computer programs. The memory 41 may also be used to temporarily store data that has been output or is to be output.
In addition, an embodiment of the present application further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the computer program implements the steps in any of the method embodiments described above.
The embodiments of the present application provide a computer program product, which when executed on a computer device, enables the computer device to implement the steps in the above method embodiments.
In several embodiments provided herein, it will be understood that each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application, or portions thereof, which substantially or partially contribute to the prior art, may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device to perform 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-mentioned embodiments are further detailed to explain the objects, technical solutions and advantages of the present application, and it should be understood that the above-mentioned embodiments are only examples of the present application and are not intended to limit the scope of the present application. It should be understood that any modifications, equivalents, improvements and the like, which come within the spirit and principle of the present application, may occur to those skilled in the art and are intended to be included within the scope of the present application.

Claims (10)

1. A voltage regulation method of a wind power and energy storage combined system is characterized in that the wind power and energy storage combined system comprises a wind turbine generator and a plurality of energy storage groups, and the voltage regulation method comprises the following steps:
acquiring reactive power data output by the wind turbine generator;
determining whether the wind turbine generator is in a power shortage state or not according to the reactive power data;
if the wind turbine generator is in a power shortage state, determining reactive power data to be compensated of the wind turbine generator according to the reactive power data;
and controlling the energy storage group to perform reactive compensation on the wind turbine generator based on the to-be-compensated reactive power data so as to regulate the voltage of the wind power energy storage combined system.
2. The voltage regulating method of the wind power and energy storage combined system according to claim 1, wherein the obtaining of the reactive power data output by the wind turbine generator comprises:
when the wind turbine generator is in power shortage, current data of a grid-side converter in a q-axis direction are obtained, and the grid-side converter is used for connecting the wind turbine generator and a power grid so as to enable output power of the wind turbine generator to flow into the power grid;
and determining reactive power data output by the wind turbine generator set based on the current data.
3. The voltage regulating method of the wind power and energy storage combined system according to claim 1, wherein the determining whether the wind turbine generator is in a power shortage state according to the reactive power data comprises:
comparing the reactive power data with a preset planned power generation curve;
and if the reactive power data are smaller than the power data of the preset planned generating power curve, determining that the wind turbine generator is in a power shortage state.
4. The voltage regulating method of the wind power energy storage combined system according to claim 1, wherein if the wind turbine generator is in a power shortage state, determining the reactive power data to be compensated of the wind turbine generator according to the reactive power data includes:
if the wind turbine generator is in a power shortage state, calculating a difference value between planned output power of a power grid bus and the reactive power data;
and determining the difference as the reactive power data to be compensated of the wind turbine generator.
5. The voltage regulating method of the wind power energy storage combined system according to claim 1, wherein the controlling the energy storage group to perform reactive power compensation on the wind turbine based on the to-be-compensated reactive power data to regulate the voltage of the wind power energy storage combined system comprises:
filtering the reactive power data to be compensated to remove high-frequency components in the reactive power data to be compensated so as to obtain a compensation power input value;
and if the compensation power input value is larger than the maximum output value of the energy storage set, controlling the energy storage set to perform reactive compensation on the wind turbine generator set by using the maximum output value.
6. The voltage regulating method for the wind power and energy storage combined system according to claim 5, wherein the maximum output value is calculated based on a preset parameter, and the preset parameter is a preset power factor or reactive power regulated by a voltage of a common connection point of the wind power and energy storage combined system.
7. The voltage regulation method of the wind power and energy storage combined system according to claim 1, wherein the energy storage group comprises a bidirectional converter and a storage battery, and the bidirectional converter is used for controlling active power and reactive power output by the storage battery.
8. The utility model provides a wind-powered electricity generation energy storage combined system's pressure regulating device, its characterized in that, wind-powered electricity generation energy storage combined system includes wind turbine generator system and a plurality of energy storage group, pressure regulating device includes:
the acquisition module is used for acquiring reactive power data output by the wind turbine generator;
the first determining module is used for determining whether the wind turbine generator is in a power shortage state or not according to the reactive power data;
the second determining module is used for determining the reactive power data to be compensated of the wind turbine generator according to the reactive power data if the wind turbine generator is in a power shortage state;
and the control module is used for controlling the energy storage group to perform reactive compensation on the wind turbine generator based on the to-be-compensated reactive power data so as to regulate the voltage of the wind power energy storage combined system.
9. Computer arrangement, characterized by comprising a processor and a memory for storing a computer program which, when executed by the processor, implements a method for regulating voltage of a wind power and energy storage combined system according to any of claims 1 to 7.
10. A computer-readable storage medium, characterized in that it stores a computer program which, when executed by a processor, implements the voltage regulation method of the wind power and energy storage combined system according to any one of claims 1 to 7.
CN202210463686.2A 2022-04-28 2022-04-28 Voltage regulating method, device, equipment and storage medium of wind power and energy storage combined system Pending CN114759571A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210463686.2A CN114759571A (en) 2022-04-28 2022-04-28 Voltage regulating method, device, equipment and storage medium of wind power and energy storage combined system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210463686.2A CN114759571A (en) 2022-04-28 2022-04-28 Voltage regulating method, device, equipment and storage medium of wind power and energy storage combined system

Publications (1)

Publication Number Publication Date
CN114759571A true CN114759571A (en) 2022-07-15

Family

ID=82333940

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210463686.2A Pending CN114759571A (en) 2022-04-28 2022-04-28 Voltage regulating method, device, equipment and storage medium of wind power and energy storage combined system

Country Status (1)

Country Link
CN (1) CN114759571A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115842365A (en) * 2022-11-29 2023-03-24 盛东如东海上风力发电有限责任公司 Temporary output compensation method and system for wind power unit to stored energy

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115842365A (en) * 2022-11-29 2023-03-24 盛东如东海上风力发电有限责任公司 Temporary output compensation method and system for wind power unit to stored energy
CN115842365B (en) * 2022-11-29 2024-10-29 盛东如东海上风力发电有限责任公司 Temporary output compensation method and system for wind power unit to store energy

Similar Documents

Publication Publication Date Title
US11770098B2 (en) Coordinated control of renewable electric generation resource and charge storage device
CN110492531B (en) Power system scheduling operation method and system considering synchronous rotation inertia level
US9640997B2 (en) Power system stabilization using distributed inverters
CN109066770B (en) Control method and device for accessing wind power to flexible direct current power transmission system
EP2362521B1 (en) Power generation frequency control
CN106374498B (en) A kind of micro-capacitance sensor tidal current computing method considering the control of secondary voltage frequency
JP2011114899A (en) Method and apparatus for controlling load frequency
CN103545849A (en) Framework with wind electricity participating in system frequency modulation control
CN109286200B (en) Control method and control system of variable-speed constant-frequency wind turbine generator
CN106532725B (en) Virtual synchronous generator type distributed power supply-based power distribution network voltage control method
CN109995051A (en) A kind of micro- energy net systematic electricity frequency modulation control method and system
Teng et al. Key technologies and the implementation of wind, PV and storage co-generation monitoring system
CN115528674A (en) Offshore wind farm virtual inertia optimal distribution method and system based on load shedding operation
Fang et al. An optimal control strategy for reactive power in wind farms consisting of VSCF DFIG wind turbine generator systems
CN114759571A (en) Voltage regulating method, device, equipment and storage medium of wind power and energy storage combined system
CN105720596B (en) The frequency modulation method and device of electric energy storing system
CN110429615A (en) Wind storage exchange micro-capacitance sensor automated power balance control method and system
Li et al. μ-Synthesis robust coordinated control of variable speed wind power generators and electric vehicles to regulate frequency
CN110112791A (en) Wind power plant frequency modulation method and device under the conditions of rationing the power supply
CN116436040B (en) Power transmission and distribution collaborative optimization scheduling method and system considering frequency dynamic security constraint
CN115882527A (en) Primary frequency modulation coordination control method considering energy storage new energy station droop characteristic
CN116014725A (en) Method, device, equipment and storage medium for determining secondary frequency modulation power demand
CN114204595B (en) Automatic power generation control method and system for participation of flexible resources on demand side in power grid
CN114784891A (en) Emergency frequency control method, device and medium for cluster energy storage participating power system
Meng et al. Enhancing distribution system stability and efficiency through multi‐power supply startup optimization for new energy integration

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