CN115051395A - Method and device for determining new energy receiving capacity of flexible direct system - Google Patents

Method and device for determining new energy receiving capacity of flexible direct system Download PDF

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Publication number
CN115051395A
CN115051395A CN202210560733.5A CN202210560733A CN115051395A CN 115051395 A CN115051395 A CN 115051395A CN 202210560733 A CN202210560733 A CN 202210560733A CN 115051395 A CN115051395 A CN 115051395A
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China
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fault
direct current
flexible
voltage
flexible direct
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CN202210560733.5A
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Inventor
王玉
黄锡芳
刘福锁
朱玲
李威
徐广�
雷杰
李兆伟
孙仲卿
成硕
王超
刘芮彤
陶泉霖
林文莉
张红丽
郜建良
段方维
张倩
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State Grid Corp of China SGCC
State Grid Liaoning Electric Power Co Ltd
Electric Power Research Institute of State Grid Liaoning Electric Power Co Ltd
Nari Technology Co Ltd
State Grid Electric Power Research Institute
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State Grid Corp of China SGCC
State Grid Liaoning Electric Power Co Ltd
Electric Power Research Institute of State Grid Liaoning Electric Power Co Ltd
Nari Technology Co Ltd
State Grid Electric Power Research Institute
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Application filed by State Grid Corp of China SGCC, State Grid Liaoning Electric Power Co Ltd, Electric Power Research Institute of State Grid Liaoning Electric Power Co Ltd, Nari Technology Co Ltd, State Grid Electric Power Research Institute filed Critical State Grid Corp of China SGCC
Priority to CN202210560733.5A priority Critical patent/CN115051395A/en
Publication of CN115051395A publication Critical patent/CN115051395A/en
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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
    • H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
    • 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
    • H02J3/388—Islanding, i.e. disconnection of local power supply from the network
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
    • H02J3/48—Controlling the sharing of the in-phase component
    • 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
    • H02J2203/10—Power transmission or distribution systems management focussing at grid-level, e.g. load flow analysis, node profile computation, meshed network optimisation, active network management or spinning reserve management

Abstract

The invention discloses a method and a device for determining new energy capacity accepted by a flexible direct system, which fully take the transient direct voltage constraint and the input of an energy consumption device into account, determine the new energy capacity accepted by the flexible direct system, reduce equipment overvoltage and locking risk caused by alternating current fault, and provide reference for the actual engineering construction of new energy flexible direct transmission systems such as offshore wind power and the like.

Description

Method and device for determining new energy receiving capacity of flexible direct system
Technical Field
The invention relates to a method and a device for determining new energy accepting capacity of a flexible direct system, and belongs to the field of stability analysis and control of a power system.
Background
With the construction of a novel power system taking new energy as a main body, the field of new energy will meet huge development opportunities. The flexible direct-current power transmission has the advantages of relatively low cost of long-distance power transmission, capability of independently controlling active power and reactive power, capability of realizing isolated island and multi-terminal access and the like, and is considered as an important type of new energy grid connection in the future.
The new energy collection flexible direct system (new energy flexible direct island sending system) is used as a new power grid type, and the dynamic characteristics and the control of the new energy collection flexible direct island sending system have the following special points: the single disturbance may cause power imbalance in the collection system, cause overvoltage of power electronic equipment, and have extremely short control time, the conventional control cannot adapt to the control requirement of the collection system, and the conventional control needs to depend on the self-regulating capacity and bearing capacity of the equipment such as flexible direct current and energy consumption, and if the new energy access scale is too large, the fault impact exceeds the self-bearing capacity of the system, and chain reactions such as system locking will be caused. Therefore, in order to reduce the equipment overvoltage and the risk of locking due to ac faults, a method for determining the new energy accepting capacity of the flexible direct current system is needed.
Disclosure of Invention
The invention provides a method and a device for determining new energy receiving capacity of a flexible direct system, which solve the problems disclosed in the background technology.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a method for determining new energy accepting capacity of a flexible direct system comprises the following steps:
according to the running parameters of the flexible direct current system, the transient direct current voltage constraint and the input of an energy consumption device are calculated, and the relation between the transient direct current voltage and the power unbalance of the flexible direct current system after the fault is determined;
and calculating the capacity of the new energy accepted by the flexible direct current system according to the relation between the transient direct current voltage and the power unbalance of the flexible direct current system after the fault.
The operation parameters of the flexible direct current system comprise a direct current equivalent capacitor, the maximum value of transient direct current voltage which can be borne by the flexible direct current system, the rated power of an energy consumption device and the rated voltage of the flexible direct current system.
The relationship between the transient state direct current voltage and the power unbalance amount of the flexible direct current system after the fault is as follows:
Figure BDA0003656475540000021
wherein T is the maximum rise time of the DC voltage in the fault, 0 is the fault occurrence time, C is the DC equivalent capacitance, U DC_t Is a transient DC voltage, U, of a soft DC system at time t in a fault DC_t ≤U DC_max ，U DC_max Is the maximum value of transient DC voltage, Δ P, that the flexible direct current system can bear Σ_t The power unbalance amount of the flexible-straight system at the moment t after the fault is detected;
ΔP Σ_t ＝ΔP DC_t -ΔP R_t
ΔP DC_t ＝P DC_0 (0≤t≤T)
Figure BDA0003656475540000022
wherein, Δ P R_t Power, Δ P, of energy-consuming devices put into operation at time t in a fault DC_t The unbalanced power P of the flexible-straight system at the moment t after the fault DC_0 The running power of the flexible straight system before the fault, T' is the input time of the energy consumption device, P R_N The rated power is the energy consumption device.
The formula for calculating the new energy capacity admitted by the flexible and direct system is as follows:
Figure BDA0003656475540000023
wherein, P max The capacity of new energy accepted by the flexible direct current system is C, the DC equivalent capacitance, T, the maximum rise time of the DC voltage in the fault, the fault clearing time and U DC_max Is the maximum value of the transient DC voltage, U, that the flexible direct current system can bear DC_0 Rated voltage of the flexible and straight system, T' is the input time of the energy consumption device, P R_N The rated power is the energy consumption device.
A device for determining new energy accepting capacity of a flexible direct system, comprising:
the relation determining module is used for calculating transient direct-current voltage constraint and input of an energy consumption device according to the running parameters of the flexible direct-current system and determining the relation between the transient direct-current voltage and the power unbalance of the flexible direct-current system after the fault;
and the calculation module is used for calculating the capacity of the new energy accepted by the flexible direct current system according to the relation between the transient direct current voltage and the power unbalance amount of the flexible direct current system after the fault.
The operation parameters of the flexible direct current system comprise a direct current equivalent capacitor, the maximum value of transient direct current voltage which can be borne by the flexible direct current system, the rated power of an energy consumption device and the rated voltage of the flexible direct current system.
The relationship between the transient state direct current voltage and the power unbalance amount of the flexible direct current system after the fault is determined by the relationship determination module as follows:
Figure BDA0003656475540000031
wherein T is the maximum rise time of the DC voltage in the fault, 0 is the fault occurrence time, C is the DC equivalent capacitance, U DC_t Is a transient DC voltage, U, of a soft DC system at time t in a fault DC_t ≤U DC_max ，U DC_max Is the maximum value of transient DC voltage, Δ P, that the flexible direct current system can bear Σ_t The power unbalance amount of the flexible and straight system at the moment t after the fault is detected;
ΔP Σ_t ＝ΔP DC_t -ΔP R_t
ΔP DC_t ＝P DC_0 (0≤t≤T)
Figure BDA0003656475540000032
wherein, Δ P R_t Power, Δ P, of energy-consuming devices put into the fault at time t DC_t The unbalanced power P of the flexible-straight system at the moment t after the fault DC_0 The running power of the flexible straight system before the fault, T' is the input time of the energy consumption device, P R_N The rated power is the energy consumption device.
The formula for calculating the new energy capacity admitted by the flexible and direct system in the calculation module is as follows:
Figure BDA0003656475540000041
wherein, P max The capacity of new energy accepted by the flexible direct current system is C, the DC equivalent capacitance, T, the maximum rise time of the DC voltage in the fault, the fault clearing time and U DC_max Is the maximum value of the transient DC voltage, U, that the flexible direct current system can bear DC_0 Rated voltage of the flexible and straight system, T' is the input time of the energy consumption device, P R_N The rated power is the energy consumption device.
A computer readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by a computing device, cause the computing device to perform a method for a flexible direct system to accept a determination of new energy capacity.
A computing device comprising one or more processors, one or more memories, and one or more programs stored in the one or more memories and configured to be executed by the one or more processors, the one or more programs including instructions for performing a method of determining a new energy capacity for a flexible direct system.
The invention achieves the following beneficial effects: the invention fully takes the transient direct-current voltage constraint and the investment of energy consumption devices into account, determines the capacity of new energy accepted by the flexible direct system, reduces the equipment overvoltage and locking risk caused by alternating-current fault, and provides reference for the actual engineering construction of new energy flexible direct-transmission systems such as offshore wind power and the like.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, a method for determining new energy accepting capacity of a flexible direct system includes the following steps:
step 1, according to the running parameters of the flexible direct current system, considering transient direct current voltage constraint and the input of an energy consumption device, and determining the relationship between the transient direct current voltage and the power unbalance of the flexible direct current system after a fault;
and 2, calculating the capacity of the new energy accepted by the flexible direct current system according to the relation between the transient direct current voltage and the power unbalance of the flexible direct current system after the fault.
The method fully considers the transient direct-current voltage constraint and the investment of energy consumption devices, determines the capacity of new energy accepted by the flexible direct-current system, reduces equipment overvoltage and locking risks caused by alternating-current faults, and provides reference for the actual engineering construction of new energy flexible direct-current transmission systems such as offshore wind power and the like.
The gentle system of directly seeing off (gentle straight system promptly) of new forms of energy, send end new forms of energy power and all directly see off through gentle, gentle directly see off the end and adopt the isolated island control mode, gentle directly receive the end and insert big electric wire netting. According to the flexible direct current design parameters, obtaining the maximum value U of the transient direct current voltage which can be borne by the direct current equivalent capacitor C and the flexible direct current system DC_max (intrinsic parameters of the plant), the power rating of the energy consuming device and the voltage rating of the straightening system.
The unbalanced power after the fault is born by the direct current capacitor, and according to the charge-discharge basic principle of the capacitor, the relation between the transient direct current voltage and the power unbalance of the flexible-direct system after the fault can be constructed and can be expressed as follows by a formula:
Figure BDA0003656475540000051
wherein T is the maximum rise time of the DC voltage in the fault, 0 is the fault occurrence time, C is the DC equivalent capacitance, U DC_t Is a transient DC voltage, U, of a soft DC system at time t in a fault DC_t ≤U DC_max ，U DC_max Is the maximum value of transient DC voltage, Δ P, that the flexible direct current system can bear Σ_t The power unbalance amount of the gentle and straight system at the moment t after the fault.
Considering the investment of the energy consumption device, after the energy consumption investment, a part of power unbalance can be shared, and the power unbalance delta P borne by the flexible and direct system per se Σ_t The calculation formula can be expressed as:
ΔP Σ_t ＝ΔP DC_t -ΔP R_t
wherein, Δ P R_t The power of the energy consumption device is input at the moment t in the fault.
U DC_t The unbalanced power when the short-circuit fault occurs on the outgoing line of the alternating-current side of the receiving end converter station is taken, and can be expressed as follows by a formula:
ΔP DC_t ＝P DC_0 (0≤t≤T)
wherein, P DC_0 Operating Power, Δ P, for the Gentle System before failure DC_t The unbalanced power of the flexible system is measured at t time after the fault.
Delta P with input of power of energy consumption device R_t Is 0, Δ P at power input of the energy consuming device R_t For its rated power, it can be formulated as:
Figure BDA0003656475540000061
wherein, P DC_0 T' is the input time of the energy consumption device and is determined by the delay of the energy consumption control system, P R_N The rated power is the power consumption device.
Will be delta P Σ_t 、ΔP DC_t And Δ P R_t By substituting the above relationship with the formula (c), we can obtain:
Figure BDA0003656475540000062
the new energy capacity admitted by the flexible system is therefore:
Figure BDA0003656475540000063
wherein, P max New energy capacity admitted to the flexible system and P is calculated max When it is, take U DC_T ＝U DC_max And T is the fault clearing time which is generally determined according to the action time of the relay protection main protection under the condition of alternating-current three-phase short circuit and can be 100 ms.
The above formula can thus be transformed into:
Figure BDA0003656475540000064
the new energy capacity admitted by the flexible direct system can be directly calculated based on the formula.
The method aims at the direct current transient overvoltage constraint under the new energy flexible direct island sending system fault, calculates the investment of energy consumption devices in the system by deducing the relation between the direct current transient overvoltage and the power surplus of the flexible direct island sending system, determines the capacity of the flexible direct island sending system capable of accepting new energy, and can provide reference for the planning and design of new energy island grid-connected projects such as offshore wind power flexible direct sending and the like.
Based on the same technical scheme, the invention also discloses a corresponding software device, and the device for determining the new energy receiving capacity of the flexible direct system comprises:
the relation determining module is used for calculating transient direct-current voltage constraint and input of an energy consumption device according to the running parameters of the flexible direct-current system and determining the relation between the transient direct-current voltage and the power unbalance of the flexible direct-current system after the fault occurs; the operation parameters of the flexible-direct system comprise a direct current equivalent capacitor, the maximum value of transient direct current voltage which can be borne by the flexible-direct system, the rated power of an energy consumption device and the rated voltage of the flexible-direct system.
The relationship between the transient state direct current voltage and the power unbalance amount of the flexible direct current system after the fault determined by the relationship determination module is as follows:
Figure BDA0003656475540000071
wherein T is the maximum rise time of the DC voltage in the fault, 0 is the fault occurrence time, C is the DC equivalent capacitance, U DC_t Is a transient DC voltage, U, of a soft DC system at time t in a fault DC_t ≤U DC_max ，U DC_max Is the maximum value of transient DC voltage, Δ P, that the flexible direct current system can bear Σ_t The power unbalance amount of the flexible and straight system at the moment t after the fault is detected;
ΔP Σ_t ＝ΔP DC_t -ΔP R_t
ΔP DC_t ＝P DC_0 (0≤t≤T)
Figure BDA0003656475540000072
wherein, Δ P R_t Power, Δ P, of energy-consuming devices put into the fault at time t DC_t The unbalanced power P of the flexible-straight system at the moment t after the fault DC_0 The running power of the flexible straight system before the fault, T' is the input time of the energy consumption device, P R_N The rated power is the energy consumption device.
And the calculation module is used for calculating the capacity of the new energy accepted by the flexible direct current system according to the relation between the transient direct current voltage and the power unbalance amount of the flexible direct current system after the fault.
The formula for calculating the new energy accepting capacity of the flexible direct system in the calculation module is as follows:
Figure BDA0003656475540000081
wherein, P max The capacity of new energy accepted by the flexible direct current system is C, the DC equivalent capacitance, T, the maximum rise time of the DC voltage in the fault, the fault clearing time and U DC_max Is the maximum value of the transient DC voltage, U, that the flexible direct current system can bear DC_0 Rated voltage of the flexible and straight system, T' is the input time of the energy consumption device, P R_N The rated power is the energy consumption device.
Based on the same technical solution, the present invention also discloses a computer readable storage medium storing one or more programs, the one or more programs including instructions, which when executed by a computing device, cause the computing device to execute a determination method for a flexible direct system to accept new energy capacity.
Based on the same technical solution, the present invention also discloses a computing device comprising one or more processors, one or more memories, and one or more programs, wherein the one or more programs are stored in the one or more memories and configured to be executed by the one or more processors, and the one or more programs include instructions for executing the determination method for accepting the new energy capacity by the flexible direct system.
As will be appreciated by one skilled in the art, 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 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 flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams 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.
The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are included in the scope of the claims of the present invention which are filed as the application.

Claims (10)

1. A method for determining new energy accepting capacity of a flexible direct system is characterized by comprising the following steps:
according to the running parameters of the flexible direct current system, the transient direct current voltage constraint and the input of an energy consumption device are calculated, and the relation between the transient direct current voltage and the power unbalance of the flexible direct current system after the fault is determined;
and calculating the capacity of the new energy accepted by the flexible direct current system according to the relation between the transient direct current voltage and the power unbalance of the flexible direct current system after the fault.
2. The method of claim 1, wherein the operating parameters of the flexible direct current system include dc equivalent capacitance, maximum transient dc voltage that the flexible direct current system can withstand, rated power of the energy consuming device, and rated voltage of the flexible direct current system.
3. The method as claimed in claim 1, wherein the relationship between the transient dc voltage and the power imbalance of the flexible direct current system after the fault is:
Figure FDA0003656475530000011
wherein T is the maximum rise time of the DC voltage in the fault, 0 is the fault occurrence time, C is the DC equivalent capacitance, U DC_t Is a transient DC voltage, U, of a soft DC system at time t in a fault DC_t ≤U DC_max ，U DC_max Is the maximum value of transient DC voltage, Δ P, that the flexible direct current system can bear Σ_t The power unbalance amount of the flexible-straight system at the moment t after the fault is detected;
ΔP Σ_t ＝ΔP DC_t -ΔP R_t
ΔP DC_t ＝P DC_0 (0≤t≤T)
Figure FDA0003656475530000012
wherein, Δ P R_t Power, Δ P, of energy-consuming devices put into operation at time t in a fault DC_t The unbalanced power P of the flexible-straight system at the moment t after the fault DC_0 The running power of the flexible straight system before the fault, T' is the input time of the energy consumption device, P R_N The rated power is the energy consumption device.
4. The method for determining new energy capacity of flexible direct system according to claim 1, wherein the formula for calculating new energy capacity of flexible direct system is:
Figure FDA0003656475530000021
wherein, P max The capacity of new energy accepted by the flexible direct current system is C, the DC equivalent capacitance, T, the maximum rise time of the DC voltage in the fault, the fault clearing time and U DC_max Is the maximum value of the transient DC voltage, U, that the flexible direct current system can bear DC_0 Rated voltage of the flexible and straight system, T' is the input time of the energy consumption device, P R_N The rated power is the energy consumption device.
5. A device for determining new energy receiving capacity of a flexible direct system, comprising:
the relation determining module is used for calculating transient direct-current voltage constraint and input of an energy consumption device according to the running parameters of the flexible direct-current system and determining the relation between the transient direct-current voltage and the power unbalance of the flexible direct-current system after the fault occurs;
and the calculation module is used for calculating the capacity of the new energy accepted by the flexible-direct system according to the relation between the transient state direct current voltage and the power unbalance amount of the flexible-direct system after the fault.
6. The device for determining the new energy receiving capacity of a flexible direct current system according to claim 5, wherein the operating parameters of the flexible direct current system comprise a direct current equivalent capacitance, a maximum transient direct current voltage that the flexible direct current system can bear, a rated power of an energy consumption device and a rated voltage of the flexible direct current system.
7. The apparatus for determining the new energy accepting capacity of the flexible direct current system according to claim 5, wherein the relationship determining module determines the relationship between the transient dc voltage and the power unbalance amount of the flexible direct current system after the fault as follows:
Figure FDA0003656475530000022
wherein T is the maximum rise time of the DC voltage in the fault, 0 is the fault occurrence time, C is the DC equivalent capacitance, U DC_t Is a transient DC voltage, U, of a soft DC system at time t in a fault DC_t ≤U DC_max ，U DC_max Is the maximum value of transient DC voltage, Δ P, that the flexible direct current system can bear Σ_t The power unbalance amount of the flexible and straight system at the moment t after the fault is detected;
ΔP Σ_t ＝ΔP DC_t -ΔP R_t
ΔP DC_t ＝P DC_0 (0≤t≤T)
Figure FDA0003656475530000031
wherein, Δ P R_t Power, Δ P, of energy-consuming devices put into operation at time t in a fault DC_t The unbalanced power P of the flexible-straight system at the moment t after the fault DC_0 The running power of the flexible straight system before the fault, T' is the input time of the energy consumption device, P R_N The rated power is the energy consumption device.
8. The device for determining new energy capacity of flexible direct system according to claim 5, wherein the formula for calculating new energy capacity of flexible direct system in the calculating module is:
Figure FDA0003656475530000032
wherein, P max The capacity of new energy accepted by the flexible direct current system is C, the DC equivalent capacitance, T, the maximum rise time of the DC voltage in the fault, the fault clearing time and U DC_max Is the maximum value of the transient DC voltage, U, that the flexible direct current system can bear DC_0 Rated voltage of flexible and straight system, T' is the moment of energy consumption device, P R_N The rated power is the energy consumption device.
9. A computer readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by a computing device, cause the computing device to perform any of the methods of claims 1-4.
10. A computing device, comprising:
one or more processors, one or more memories, and one or more programs stored in the one or more memories and configured to be executed by the one or more processors, the one or more programs including instructions for performing any of the methods of claims 1-4.
CN202210560733.5A 2022-05-23 2022-05-23 Method and device for determining new energy receiving capacity of flexible direct system Pending CN115051395A (en)

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