CN116154812A - Grid-structured energy storage control method and system for power grid voltage operation problem - Google Patents
Grid-structured energy storage control method and system for power grid voltage operation problem Download PDFInfo
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- CN116154812A CN116154812A CN202211074950.XA CN202211074950A CN116154812A CN 116154812 A CN116154812 A CN 116154812A CN 202211074950 A CN202211074950 A CN 202211074950A CN 116154812 A CN116154812 A CN 116154812A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
Abstract
The invention discloses a network construction type energy storage control method and system aiming at the power grid voltage operation problem, wherein the method comprises the following steps: acquiring bus voltage data of a new energy collecting station in real time, and generating bus voltage deviation based on the bus voltage data and a bus voltage reference value; when the bus voltage deviation is greater than a preset bus voltage deviation threshold, starting energy storage active control, energy storage reactive power regulation control and energy storage comprehensive control, wherein: the energy storage active control is that a voltage phase control instruction value is generated according to the energy storage charge state, the energy storage active power output value and a preset active power reference value; the energy storage reactive power regulation control is that a voltage amplitude control instruction value is generated according to the voltage deviation of the bus; the energy storage comprehensive control is that an internal potential control command value is generated according to a voltage phase control command value and a voltage amplitude control command value; and sending the internal potential control command value to an energy storage system, and performing energy storage control by the energy storage system based on the internal potential control command value.
Description
Technical Field
The invention relates to the technical field of operation and control of power systems, in particular to a grid-structured energy storage control method and system aiming at the problem of power grid voltage operation.
Background
With the rapid development of new energy power generation technologies such as wind power, photovoltaic and the like, the duty ratio of power electronic equipment in a power grid is rapidly increased, and the installed proportion of a traditional rotary synchronous generator is gradually reduced. Because the new energy power generation system such as wind power, photovoltaic and the like has different dynamic characteristics from the conventional synchronous machine, the new energy with low inertia and weak support is connected in a large scale, and the voltage stability of the power system is seriously affected.
At present, the energy storage system equipped with the new energy station can break through the constraint of the traditional power supply and demand in time and space, has the characteristics of accurate control, quick response, flexible configuration, four-quadrant flexible power regulation and the like, and has the capability of participating in the operation regulation and control and the safe and stable control of the power system. The control strategy of the energy storage converter in different scenes is customized, so that the control strategy can play an important role in the aspect of safety and stability control of the power grid. However, the conventional energy storage converter is controlled based on current source logic, synchronization with an alternating current power grid is needed to be achieved through a phase-locked loop, and active support cannot be provided for stable operation of the power grid. Moreover, this control method introduces a delay in the transient process, which may exacerbate the fluctuation range of the system low voltage or overvoltage.
Therefore, a technique is needed to achieve grid-built energy storage control for grid voltage operation problems.
Disclosure of Invention
The technical scheme of the invention provides a grid-structured energy storage control method and a system for solving the problem of power grid voltage operation, so as to control the grid-structured energy storage.
In order to solve the above problems, the present invention provides a method for controlling energy storage of a grid structure for solving the problem of voltage operation of a power grid, the method comprising:
acquiring bus voltage data of a new energy collecting station in real time, and generating bus voltage deviation based on the bus voltage data and a bus voltage reference value;
when the bus voltage deviation is larger than a preset bus voltage deviation threshold, starting energy storage active control, energy storage reactive power regulation control and energy storage comprehensive control, wherein:
the energy storage active control is that a voltage phase control instruction value is generated according to an energy storage charge state, an energy storage active power output value and a preset active power reference value;
the energy storage reactive power regulation control is that a voltage amplitude control instruction value is generated according to the bus voltage deviation;
the energy storage comprehensive control is that according to the voltage phase control instruction value and the voltage amplitude control instruction value, generating an internal potential control command value; and sending the internal potential control command value to an energy storage system, wherein the energy storage system performs energy storage control based on the internal potential control command value.
Preferably, the method also comprises the steps of, active control based on net-structured energy storage the model starts the energy storage active control;
the constructing the network-structured energy storage active control model comprises the following steps:
acquiring an energy storage charge state and an energy storage rated capacity, and generating an energy storage active power correction coefficient; and constructing a net-structured energy storage active power control model according to a traditional synchronous generator rotor motion equation, and calculating the active power correction coefficient into an energy storage active control link.
Preferably, the method further comprises starting the energy storage reactive power regulation control based on a network-structured energy storage reactive power control model;
the constructing the network-structured energy storage reactive power control model comprises the following steps:
and constructing a reactive voltage droop control link according to the voltage regulation characteristic of the traditional synchronous generator, and constructing a network-structured energy storage reactive power control model.
Preferably, the method further comprises starting the energy storage integrated control based on a network-structured energy storage integrated control model;
the constructing the network-structured energy storage comprehensive control model comprises the following steps:
according to a preset PI control strategy, constructing a voltage outer loop proportional integral control link and a current inner loop proportional integral control link; based on the voltage outer loop control and the current inner loop control, a network-structured energy storage comprehensive control model is established.
Based on another aspect of the present invention, a computer readable storage medium is provided, which stores a computer program for executing a grid-built energy storage control method for grid voltage operation problem.
Based on another aspect of the present invention, there is provided an electronic apparatus including: a processor and a memory; wherein, the liquid crystal display device comprises a liquid crystal display device,
the memory is used for storing the processor executable instructions;
the processor is used for reading the executable instructions from the memory and executing the instructions to realize a network construction type energy storage control method aiming at the power grid voltage operation problem.
Based on another aspect of the present invention, the present invention provides a grid-formation energy storage control system for a grid voltage operation problem, the system comprising:
the data acquisition module is used for acquiring bus voltage data of the new energy collection station in real time and generating bus voltage deviation based on the bus voltage data and the bus voltage reference value;
the energy storage control mode identification module is used for starting energy storage active control, energy storage reactive power regulation control and energy storage comprehensive control when the bus voltage deviation is larger than a preset bus voltage deviation threshold;
the energy storage active control module is used for starting the energy storage active control and generating a voltage phase control instruction value according to the energy storage charge state, the energy storage active power output value and a preset active power reference value;
the energy storage reactive power control module is used for starting the energy storage reactive power regulation control and generating a voltage amplitude control instruction value according to the bus voltage deviation;
the energy storage integrated control module is used for starting the energy storage integrated control and generating an internal potential control command value according to the voltage phase control command value and the voltage amplitude control command value; and sending the internal potential control command value to an energy storage system, wherein the energy storage system performs energy storage control based on the internal potential control command value.
Preferably, the energy storage active control module is further configured to start the energy storage active control based on a network formation type energy storage active control model;
the constructing the network-structured energy storage active control model comprises the following steps:
acquiring an energy storage charge state and an energy storage rated capacity, and generating an energy storage active power correction coefficient; and constructing a net-structured energy storage active power control model according to a traditional synchronous generator rotor motion equation, and calculating the active power correction coefficient into an energy storage active control link.
Preferably, the energy storage reactive power control module is further configured to start the energy storage reactive power adjustment control based on a network formation type energy storage reactive power control model;
the constructing the network-structured energy storage reactive power control model comprises the following steps:
and constructing a reactive voltage droop control link according to the voltage regulation characteristic of the traditional synchronous generator, and constructing a network-structured energy storage reactive power control model.
Preferably, the energy storage integrated control module is further configured to start the energy storage integrated control based on a network formation type energy storage integrated control model;
the constructing the network-structured energy storage comprehensive control model comprises the following steps:
according to a preset PI control strategy, constructing a voltage outer loop proportional integral control link and a current inner loop proportional integral control link; based on the voltage outer loop control and the current inner loop control, a network-structured energy storage comprehensive control model is established.
The technical scheme of the invention provides a grid-structured energy storage control method and system aiming at the power grid voltage operation problem, wherein the method comprises the following steps: acquiring bus voltage data of a new energy collecting station in real time, and generating bus voltage deviation based on the bus voltage data and a bus voltage reference value; when the bus voltage deviation is larger than a preset bus voltage deviation threshold, starting energy storage active control, energy storage reactive power regulation control and energy storage comprehensive control, wherein: the energy storage active control is that a voltage phase control instruction value is generated according to an energy storage charge state, an energy storage active power output value and a preset active power reference value; the energy storage reactive power regulation control is that a voltage amplitude control instruction value is generated according to the bus voltage deviation; the energy storage comprehensive control is that an internal potential control command value is generated according to the voltage phase control command value and the voltage amplitude control command value; and sending the internal potential control command value to an energy storage system, wherein the energy storage system performs energy storage control based on the internal potential control command value. According to the grid-structured energy storage control method and system for the power grid voltage operation problem, a phase-locked loop is not needed, so that the energy storage converter has the external characteristics of a synchronous generator, a self-supporting function of a voltage source without delay can be achieved, the maintenance capability on voltage amplitude and phase is stronger, and the purposes of supporting system voltage and maintaining power grid stability are achieved.
Drawings
Exemplary embodiments of the present invention may be more completely understood in consideration of the following drawings:
FIG. 1 is a flow chart of a method of grid-built energy storage control for grid voltage operation problems in accordance with a preferred embodiment of the present invention;
FIG. 2 is a schematic diagram of an exemplary DC near field new energy collection station energy storage access system according to a preferred embodiment of the present invention;
FIG. 3 is a flowchart of a method of grid-built energy storage control for grid voltage operation problems in accordance with a preferred embodiment of the present invention;
FIG. 4 is a schematic diagram of a mesh energy storage active control block according to a preferred embodiment of the present invention;
FIG. 5 is a schematic diagram of a grid-built energy storage reactive power control block diagram in accordance with a preferred embodiment of the present invention;
FIG. 6 is a schematic diagram of a grid-built energy storage integrated control block according to a preferred embodiment of the present invention; and
fig. 7 is a schematic structural diagram of a grid-configured energy storage control system for grid voltage operation according to a preferred embodiment of the present invention.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the examples described herein, which are provided to fully and completely disclose the present invention and fully convey the scope of the invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, like elements/components are referred to by like reference numerals.
Unless otherwise indicated, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. In addition, it will be understood that terms defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Fig. 1 is a flowchart of a method for grid formation energy storage control for grid voltage operation according to a preferred embodiment of the present invention. The invention provides a grid-structured energy storage control method aiming at the voltage operation problem of a power grid, which does not need a phase-locked loop, so that the energy storage converter has the external characteristics of a synchronous generator, can play a role in self-supporting a voltage source without delay, has stronger maintenance capability on voltage amplitude and phase, and achieves the purposes of supporting system voltage and maintaining power grid stability.
As shown in fig. 1, the present invention provides a network-structured energy storage control method for solving a power grid voltage operation problem, the method comprising:
step 101: acquiring bus voltage data of a new energy collecting station in real time, and generating bus voltage deviation based on the bus voltage data and a bus voltage reference value;
the invention acquires bus voltage data of the new energy collection station in real time, and generates bus voltage deviation according to the bus voltage reference value.
Step 102: and when the bus voltage deviation is larger than a preset bus voltage deviation threshold, starting energy storage active control, energy storage reactive power regulation control and energy storage comprehensive control.
According to the obtained bus voltage deviation amount and a preset bus voltage deviation amount threshold value, a net-structured energy storage control mode is determined, and energy storage regulation control is carried out according to the net-structured energy storage control mode;
the invention determines a net-structured energy storage control mode according to the acquired bus voltage deviation amount and a preset bus voltage deviation amount threshold value, and comprises the following steps:
when the bus voltage deviation value is larger than a preset bus voltage deviation value threshold, starting energy storage active and reactive power regulation control;
when the bus voltage deviation value is smaller than a preset bus voltage deviation threshold value, the energy storage active and reactive power regulation control does not act.
Step 103: the energy storage active control is that a voltage phase control instruction value is generated according to the energy storage charge state, the energy storage active power output value and a preset active power reference value;
the invention obtains the energy storage charge state, the energy storage rated capacity and the energy storage active power output value; and establishing a net-structured energy storage active control model considering the state of charge, and generating a voltage phase control instruction value according to the state of charge of the energy storage, the rated capacity of the energy storage, the output value of the energy storage active power and a preset active power reference value.
Step 104: the energy storage reactive power regulation control is that a voltage amplitude control instruction value is generated according to the voltage deviation of the bus;
the invention establishes a network-structured energy storage reactive power control model, and generates a voltage amplitude control instruction value according to the bus voltage deviation.
Step 105: the energy storage comprehensive control is that an internal potential control command value is generated according to a voltage phase control command value and a voltage amplitude control command value; and sending the internal potential control command value to an energy storage system, and performing energy storage control by the energy storage system based on the internal potential control command value.
The invention establishes a network-structured energy storage comprehensive control model, generates an internal potential control command value according to the voltage phase control command value and the voltage amplitude control command value, and sends the internal potential control command value to an energy storage system.
Preferably, the method further comprises the step of starting energy storage active control based on a net-structured energy storage active control model;
the construction of the network-structured energy storage active control model comprises the following steps:
acquiring an energy storage charge state and an energy storage rated capacity, and generating an energy storage active power correction coefficient; and constructing a net-structured energy storage active power control model according to a traditional synchronous generator rotor motion equation, and calculating an active power correction coefficient into an energy storage active control link.
The invention establishes a network-structured energy storage active control model considering the state of charge, comprising the following steps:
acquiring an energy storage charge state and an energy storage rated capacity, and generating an energy storage active power correction coefficient; and constructing a net-structured energy storage active power control equation according to a traditional synchronous generator rotor motion equation, and calculating the active power correction coefficient into a control link.
Preferably, the energy storage reactive power regulation control is started based on a network-structured energy storage reactive power control model;
the construction of the network-structured energy storage reactive power control model comprises the following steps:
and constructing a reactive voltage droop control link according to the voltage regulation characteristic of the traditional synchronous generator, and constructing a network-structured energy storage reactive power control model.
The invention establishes a network-structured energy storage reactive power control model, which comprises the following steps:
and constructing a reactive voltage droop control link according to the voltage regulation characteristic of the traditional synchronous generator, and establishing a network-structured energy storage reactive power control equation.
Preferably, the energy storage comprehensive control is started based on a network-structured energy storage comprehensive control model;
the construction of the network-structured energy storage comprehensive control model comprises the following steps:
according to a preset PI control strategy, constructing a voltage outer loop proportional integral control link and a current inner loop proportional integral control link; based on the voltage outer loop control and the current inner loop control, a network-structured energy storage comprehensive control model is established.
The invention establishes a network-structured energy storage comprehensive control model, which comprises the following steps:
according to a preset PI control strategy, constructing a voltage outer loop proportional integral control link and a current inner loop proportional integral control link; and forming a comprehensive control model based on the voltage outer loop control and the current inner loop control.
Based on another embodiment of the present invention, the present invention provides a computer readable storage medium, where a computer program is stored, and the computer program is used to execute a grid-formation energy storage control method for a grid voltage operation problem.
Based on another embodiment of the present invention, the present invention provides an electronic device, including: a processor and a memory; wherein, the liquid crystal display device comprises a liquid crystal display device,
a memory for storing processor-executable instructions;
and the processor is used for reading the executable instructions from the memory and executing the instructions to realize a network construction type energy storage control method aiming at the power grid voltage operation problem.
Embodiment one:
the structure of the energy storage access system in this embodiment is shown in fig. 2, and several new energy power plants in the direct current near zone access the collection station, and the energy storage is accessed to the new energy collection station through a transformer.
The embodiment of the invention provides a grid-built energy storage control method aiming at the power grid voltage operation problem, as shown in fig. 3, the method comprises the following steps:
step 1: according to new energy collection station bus voltage data V acquired in real time meas And a bus voltage reference value V ref Generating a bus voltage deviation amount DeltaV;
ΔV＝V meas -V ref
step 2: based on the obtained bus voltage deviation DeltaV and a preset bus voltage deviation threshold V db (e.g., 0.05 p.u.), determining a mesh energy storage control mode;
specifically, when the bus voltage deviation value |DeltaV| > V db When the energy storage active and reactive power regulation control is started;
when the deviation value of the bus voltage is |delta V| is less than or equal to V db And during the process, the energy storage active and reactive power regulation control does not act.
Step 3: according to the obtained energy storage charge state SOC and the energy storage rated capacity S N Generating an energy storage active power correction coefficient eta;
ΔP L ＝P L,meas -P L,ref
specifically, if 0.ltoreq.SOC < SOC max The stored energy active power correction coefficient η=1;
if SOC is max SOC is not less than 1, and the correction coefficient of the stored energy active power is not less than 1
If SOC is more than or equal to 0 and less than or equal to SOC min The correction coefficient of the stored energy active power
If SOC is min SOC is less than or equal to 1, and the energy storage active power correction coefficient eta=1;
wherein SOC is max And SOC (System on chip) min The upper and lower limits of SOC, respectively.
Step 4: establishing a net-structured energy storage active control model considering the state of charge, and correcting the coefficient eta and the energy storage active power output value P according to the energy storage active power ESS And an active power reference value P ref Generating a voltage phase control command value theta;
specifically, according to a traditional synchronous generator rotor motion equation, a net-structured energy storage active power control equation is constructed:
Δ＝∫ωdt
wherein J is virtual rotational inertia, D is virtual damping coefficient, omega is angular speed of grid-structured energy storage output voltage, omega N Is the rated electrical angular velocity of the grid voltage.
And constructing a control link according to the equation, and calculating the active power correction coefficient eta into the control link to form a control strategy as shown in figure 4.
Step 5: establishing a network-structured energy storage reactive power control model, and generating a voltage amplitude control instruction value u according to the bus voltage deviation;
specifically, according to the voltage regulation characteristic of the traditional synchronous generator, a reactive voltage droop control link is constructed, and a network-structured energy storage reactive power control equation is established:
wherein u is 0 For rated voltage amplitude, Q ESS To form a net type energy storage reactive power output value, Q ref K is the reference value of the energy storage reactive power Q For controlling the coefficient, K, of the integral link q Is the reactive voltage sag factor.
The control strategy described above is shown in fig. 5.
Step 6: and establishing a network-structured energy storage comprehensive control model, generating an internal potential control command value according to the voltage phase control command value theta and the voltage amplitude control command value u, and sending the internal potential control command value to an energy storage system.
Specifically, a voltage outer loop proportional integral control link and a current inner loop proportional integral control link are constructed according to a preset PI control strategy; and forming a comprehensive control model based on the voltage outer loop control and the current inner loop control. The control strategy described above is shown in fig. 6. Wherein C is a filter capacitor, L is a filter inductor, u d And u q For d-axis and q-axis components of voltage amplitude control command value u, u dref And u qref The d-axis and q-axis components, i, of the voltage amplitude reference d And i q D-axis and q-axis components, i, of the value of the stored output current dref And i qref Is the d-axis and q-axis components of the output current reference.
According to the network-structured energy storage control method provided by the invention, the potential and the rotor motion equation in the synchronous machine are simulated, so that the energy storage has inertia and supporting capacity similar to those of a synchronous generator, and compared with a traditional current source type converter, the network-structured energy storage control method has the advantages that the function of spontaneous supporting of a voltage source without delay can be achieved, and the maintenance capacity on voltage amplitude and phase is stronger.
The network-structured energy storage control method improves the voltage stability of the power system after a large number of power electronic equipment is connected, and realizes friendly connection of new energy power generation systems such as wind power, photovoltaic and the like.
Fig. 7 is a schematic structural diagram of a grid-configured energy storage control system for grid voltage operation according to a preferred embodiment of the present invention. As shown in fig. 7, the present invention provides a network-structured energy storage control system for solving a power grid voltage operation problem, the system comprising:
the data acquisition module is used for acquiring bus voltage data of the new energy collection station in real time and generating bus voltage deviation based on the bus voltage data and a bus voltage reference value;
the energy storage control mode identification module is used for starting energy storage active control, energy storage reactive power regulation control and energy storage comprehensive control when the bus voltage deviation is greater than a preset bus voltage deviation threshold;
the energy storage active control module is used for starting energy storage active control and generating a voltage phase control instruction value according to the energy storage charge state, the energy storage active power output value and a preset active power reference value;
the energy storage reactive power control module is used for starting energy storage reactive power regulation control and generating a voltage amplitude control instruction value according to the voltage deviation of the bus;
the energy storage integrated control module is used for starting energy storage integrated control and generating an internal potential control command value according to the voltage phase control command value and the voltage amplitude control command value; and sending the internal potential control command value to an energy storage system, and performing energy storage control by the energy storage system based on the internal potential control command value.
Preferably, the energy storage active control module is further used for starting energy storage active control based on a net-structured energy storage active control model;
the construction of the network-structured energy storage active control model comprises the following steps:
acquiring an energy storage charge state and an energy storage rated capacity, and generating an energy storage active power correction coefficient; and constructing a net-structured energy storage active power control model according to a traditional synchronous generator rotor motion equation, and calculating an active power correction coefficient into an energy storage active control link.
Preferably, the energy storage reactive power control module is further used for starting energy storage reactive power regulation control based on the network formation type energy storage reactive power control model;
the construction of the network-structured energy storage reactive power control model comprises the following steps:
and constructing a reactive voltage droop control link according to the voltage regulation characteristic of the traditional synchronous generator, and constructing a network-structured energy storage reactive power control model.
Preferably, the energy storage integrated control module is further used for starting energy storage integrated control based on a network formation type energy storage integrated control model;
the construction of the network-structured energy storage comprehensive control model comprises the following steps:
according to a preset PI control strategy, constructing a voltage outer loop proportional integral control link and a current inner loop proportional integral control link; based on the voltage outer loop control and the current inner loop control, a network-structured energy storage comprehensive control model is established.
The invention provides a network construction type energy storage control system aiming at the voltage operation problem of a power grid, which comprises the following components:
and a data acquisition module: the bus voltage deviation value is used for acquiring bus voltage data of the new energy collection station in real time and generating a bus voltage deviation value according to the bus voltage reference value; acquiring data of an energy storage charge state, an energy storage rated capacity and an energy storage active power output value, and generating an energy storage active power correction coefficient;
the energy storage control mode identification module: the energy storage control mode is determined according to the acquired bus voltage deviation and a preset bus voltage deviation threshold;
energy storage active control module: the method comprises the steps of generating a voltage phase control instruction value according to a preset net-structured energy storage active control model;
energy storage reactive power control module: the method comprises the steps of generating a voltage amplitude control instruction value according to a preset net-structured energy storage reactive power control model;
energy storage integrated control module: and the internal potential control command value is generated according to the voltage phase control command value and the voltage amplitude control command value and is sent to the energy storage system.
The grid-structured energy storage control system for the power grid voltage operation problem according to the preferred embodiment of the present invention corresponds to the grid-structured energy storage control method for the power grid voltage operation problem according to the preferred embodiment of the present invention, and will not be described herein.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein. The scheme in the embodiment of the invention can be realized by adopting various computer languages, such as object-oriented programming language Java, an transliteration script language JavaScript and the like.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
The invention has been described with reference to a few embodiments. However, as is well known to those skilled in the art, other embodiments than the above disclosed invention are equally possible within the scope of the invention, as defined by the appended patent claims.
Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise therein. All references to "a/an/the [ means, component, etc. ]" are to be interpreted openly as referring to at least one instance of said means, component, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.
Claims (10)
1. A method of grid formation energy storage control for grid voltage operation problems, the method comprising:
acquiring bus voltage data of a new energy collecting station in real time, and generating bus voltage deviation based on the bus voltage data and a bus voltage reference value;
when the bus voltage deviation is larger than a preset bus voltage deviation threshold, starting energy storage active control, energy storage reactive power regulation control and energy storage comprehensive control, wherein:
the energy storage active control is that a voltage phase control instruction value is generated according to an energy storage charge state, an energy storage active power output value and a preset active power reference value;
the energy storage reactive power regulation control is that a voltage amplitude control instruction value is generated according to the bus voltage deviation;
the energy storage comprehensive control is that an internal potential control command value is generated according to the voltage phase control command value and the voltage amplitude control command value; and sending the internal potential control command value to an energy storage system, wherein the energy storage system performs energy storage control based on the internal potential control command value.
2. The method of claim 1, further comprising initiating the energy storage active control based on a mesh energy storage active control model;
the constructing the network-structured energy storage active control model comprises the following steps:
acquiring an energy storage charge state and an energy storage rated capacity, and generating an energy storage active power correction coefficient; and constructing a net-structured energy storage active power control model according to a traditional synchronous generator rotor motion equation, and calculating the active power correction coefficient into an energy storage active control link.
3. The method of claim 1, further comprising initiating the energy storage reactive regulation control based on a grid-formation energy storage reactive control model;
the constructing the network-structured energy storage reactive power control model comprises the following steps:
and constructing a reactive voltage droop control link according to the voltage regulation characteristic of the traditional synchronous generator, and constructing a network-structured energy storage reactive power control model.
4. The method of claim 1, further comprising initiating the integrated energy storage control based on a mesh integrated energy storage control model;
the constructing the network-structured energy storage comprehensive control model comprises the following steps:
according to a preset PI control strategy, constructing a voltage outer loop proportional integral control link and a current inner loop proportional integral control link; based on the voltage outer loop control and the current inner loop control, a network-structured energy storage comprehensive control model is established.
5. A computer readable storage medium storing a computer program for performing the method of any one of claims 1-4.
6. An electronic device, the electronic device comprising: a processor and a memory; wherein, the liquid crystal display device comprises a liquid crystal display device,
the memory is used for storing the processor executable instructions;
the processor is configured to read the executable instructions from the memory and execute the instructions to implement the method of any of claims 1-4.
7. A grid-tied energy storage control system for a grid voltage operation problem, the system comprising:
the data acquisition module is used for acquiring bus voltage data of the new energy collection station in real time and generating bus voltage deviation based on the bus voltage data and the bus voltage reference value;
the energy storage control mode identification module is used for starting energy storage active control, energy storage reactive power regulation control and energy storage comprehensive control when the bus voltage deviation is larger than a preset bus voltage deviation threshold;
the energy storage active control module is used for starting the energy storage active control and generating a voltage phase control instruction value according to the energy storage charge state, the energy storage active power output value and a preset active power reference value;
the energy storage reactive power control module is used for starting the energy storage reactive power regulation control and generating a voltage amplitude control instruction value according to the bus voltage deviation;
the energy storage integrated control module is used for starting the energy storage integrated control and generating an internal potential control command value according to the voltage phase control command value and the voltage amplitude control command value; and sending the internal potential control command value to an energy storage system, wherein the energy storage system performs energy storage control based on the internal potential control command value.
8. The system of claim 7, the energy storage active control module further configured to initiate the energy storage active control based on a mesh energy storage active control model;
the constructing the network-structured energy storage active control model comprises the following steps:
acquiring an energy storage charge state and an energy storage rated capacity, and generating an energy storage active power correction coefficient; and constructing a net-structured energy storage active power control model according to a traditional synchronous generator rotor motion equation, and calculating the active power correction coefficient into an energy storage active control link.
9. The system of claim 7, the energy storage reactive control module further configured to initiate the energy storage reactive regulation control based on a mesh-based energy storage reactive control model;
the constructing the network-structured energy storage reactive power control model comprises the following steps:
and constructing a reactive voltage droop control link according to the voltage regulation characteristic of the traditional synchronous generator, and constructing a network-structured energy storage reactive power control model.
10. The system of claim 7, the energy storage integrated control module further configured to initiate the energy storage integrated control based on a mesh-based energy storage integrated control model;
the constructing the network-structured energy storage comprehensive control model comprises the following steps:
according to a preset PI control strategy, constructing a voltage outer loop proportional integral control link and a current inner loop proportional integral control link; based on the voltage outer loop control and the current inner loop control, a network-structured energy storage comprehensive control model is established.
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| CN117154765A (en) * | 2023-10-30 | 2023-12-01 | 国网江西省电力有限公司电力科学研究院 | Active standby grid-structured photovoltaic virtual synchronous generator control method and system |
| CN117154765B (en) * | 2023-10-30 | 2024-03-12 | 国网江西省电力有限公司电力科学研究院 | Active standby grid-structured photovoltaic virtual synchronous generator control method and system |
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