New energy short-circuit ratio auxiliary decision-making method and system considering distributed phase modifier

Abstract

The invention discloses a new energy short-circuit ratio aided decision-making method and system considering a distributed phase modifier. The method comprises the following steps: determining a bus set with a new energy short-circuit ratio out-of-limit; calculating the sensitivity of each phase modifier in the phase modifier set to the short-circuit capacity of each bus in the bus set; calculating the sensitivity of each phase modifier in the phase modifier set to the equivalent power of each bus in the bus set; based on the sensitivity of the short-circuit capacity of each bus and the sensitivity of the equivalent power of each bus, calculating the sensitivity of each phase modifier in the phase modifier set to the new energy short-circuit ratio of each bus in the bus set; and according to the sensitivity of each phase modifier to the new energy short-circuit ratio of each bus in the bus set, carrying out power-on auxiliary decision making on the distributed phase modifier. According to the method, the distributed phase modifier can be controlled when the new energy short-circuit ratio does not meet the requirement, the voltage supporting capacity of the power grid is improved, and support is provided for improving the new energy consumption capacity on the basis of the safety of the power grid.

Description

Technical Field

[0001] The present invention relates to the technical field of online safety and stability calculation and analysis of power systems, and more specifically, to a new energy short-circuit ratio auxiliary decision-making method and system considering distributed phase regulators. Background Art

[0002] In recent years, renewable energy has continued to grow rapidly, and its share in the power grid has increased. Due to the randomness and volatility of wind power output, and its frequency and voltage regulation characteristics are different from those of conventional generators, the system's voltage regulation and anti-disturbance capabilities have been deteriorated to a certain extent. At the same time, the problem of insufficient voltage support capacity of the power grid has affected the absorption of renewable energy. At present, the short-circuit ratio of multiple renewable energy stations has become one of the main factors restricting the transmission capacity of wind power. The national mandatory standard GB38755-2019 "Guidelines for Safety and Stability of Power Systems" clearly requires that the short-circuit ratio of renewable energy stations should reach a reasonable level. The national standard GB / T 40581-2021 "Specifications for Safety and Stability Calculation of Power Systems" stipulates that the short-circuit ratio of multiple renewable energy stations on the step-up and low-voltage side of renewable energy power generation units should be no less than 1.5, and the short-circuit ratio of multiple renewable energy stations at grid-connected points should be no less than 2.0.

[0003] As a type of synchronous motor, phase regulator can effectively improve the system short-circuit capacity, enhance the voltage support strength of the power grid, and improve the voltage support capacity of the power grid when disturbances occur. Therefore, it is urgent to study the new energy short-circuit ratio auxiliary decision-making method considering distributed phase regulators. Summary of the invention

[0004] The present invention proposes a new energy short-circuit ratio auxiliary decision-making method and system considering distributed phase regulators, so as to solve the problem of how to achieve the new energy short-circuit ratio auxiliary decision-making considering distributed phase regulators.

[0005] In order to solve the above problem, according to one aspect of the present invention, a new energy short-circuit ratio auxiliary decision method considering distributed phase regulator is provided, the method comprising:

[0006] Determine the busbar set where the short-circuit ratio of new energy exceeds the limit;

[0007] Calculating the sensitivity of each phase regulator in the phase regulator set to the short-circuit capacity of each bus in the bus set;

[0008] Calculating the sensitivity of each phase regulator in the phase regulator set to the equivalent power of each bus in the bus set;

[0009] Calculate the sensitivity of each phase regulator in the phase regulator set to the new energy short-circuit ratio of each bus in the bus set based on the sensitivity of the short-circuit capacity of each bus and the sensitivity of the equivalent power of each bus;

[0010] An auxiliary startup decision of the distributed phase regulator is performed according to the sensitivity of each phase regulator to the new energy short-circuit ratio of each bus in the bus set.

[0011] Preferably, the step of calculating the sensitivity of each phase regulator in the phase regulator set to the short-circuit capacity of each bus in the bus set comprises:

[0012] For any condenser j, set the state to outage, form an impedance matrix including branch impedance, generator and condenser impedance, and calculate the first equivalent impedance Z of any bus i to ground eq i 0 ;

[0013] Set the state of phase condenser j to operation, form an impedance matrix including branch impedance, generator and phase condenser impedance, and calculate the second equivalent impedance Z of any bus i to ground eq i 1 ;

[0014] Determine the sensitivity L of condenser j to the short-circuit capacity of bus i C j-i Z eq i 0 / Z eq i 1 -1.

[0015] Preferably, the step of calculating the sensitivity of each phase modulator in the phase modulator set to the equivalent power of each bus in the bus set comprises:

[0016] For any phase regulator j, set the state to shutdown, form an impedance matrix including branch impedance, generator and phase regulator impedance, and calculate the first equivalent power at any bus i for each new energy unit k in the new energy generation set.

[0017] Set the state of phase condenser j to operation, form an impedance matrix including branch impedance, generator and phase condenser impedance, and calculate the second equivalent power at any bus i for each new energy unit k in the new energy generation set

[0018] Calculate the sensitivity L of condenser j to the equivalent power of bus i P j-i for

[0019] Among them, P k is the power of the new energy unit k; Z eqi 0 is the first equivalent impedance to ground of any busbar i; Z i-k 0 is the mutual impedance between busbar i and new energy unit k when condenser j is out of service; Set NR For renewable energy generation collection; Z eq i 1 is the second equivalent impedance to ground of any busbar i; Z i-k 1 It is the mutual impedance between bus i and new energy unit k when phase regulator j is in operation.

[0020] Preferably, the step of calculating the sensitivity of each phase regulator in the phase regulator set to the new energy short-circuit ratio of each bus in the bus set based on the sensitivity of the short-circuit capacity of each bus and the sensitivity of the equivalent power of each bus comprises:

[0021] L D j-i =L C j-i ×L P j-i ,

[0022] Among them, L D j-i is the sensitivity of condenser j to the new energy short-circuit ratio of bus i; L C j-i is the sensitivity of phase regulator j to the short-circuit capacity of bus i; L P j-i is the sensitivity of condenser j to the equivalent power of bus i.

[0023] Preferably, the step of making a startup auxiliary decision of a distributed phase regulator according to the sensitivity of each phase regulator to the new energy short-circuit ratio of each bus in the bus set includes:

[0024] For any phase regulator j, its overall sensitivity to the busbar set with the short-circuit ratio exceeding the limit of renewable energy is calculated as follows: Among them, Set OV It is the busbar set with the new energy short-circuit ratio exceeding the limit;

[0025] Press L D j The phase regulators in the phase regulator set are sorted from large to small, and the states of the phase regulators are set to operation one by one according to the phase regulator order, and the new energy short-circuit ratio of each bus in the bus set with the new energy short-circuit ratio exceeding the limit is recalculated until the new energy short-circuit ratio of each bus in the bus set with the new energy short-circuit ratio exceeding the limit is greater than the preset new energy short-circuit ratio threshold.

[0026] According to another aspect of the present invention, a new energy short-circuit ratio auxiliary decision-making system considering distributed phase regulators is provided, the system comprising:

[0027] A busbar set determination unit, used to determine a busbar set with an over-limit short-circuit ratio of new energy sources;

[0028] A short-circuit capacity sensitivity calculation unit, used for calculating the sensitivity of each phase regulator in the phase regulator set to the short-circuit capacity of each bus in the bus set;

[0029] An equivalent power sensitivity calculation unit, used for calculating the sensitivity of each phase regulator in the phase regulator set to the equivalent power of each bus in the bus set;

[0030] A short circuit ratio sensitivity calculation unit, used for calculating the sensitivity of each phase regulator in the phase regulator set to the new energy short circuit ratio of each bus in the bus set based on the sensitivity of the short circuit capacity of each bus and the sensitivity of the equivalent power of each bus;

[0031] A decision-making unit is used to make auxiliary startup decisions for distributed phase regulators according to the sensitivity of each phase regulator to the new energy short-circuit ratio of each bus in the bus set.

[0032] Preferably, the short-circuit capacity sensitivity calculation unit calculates the sensitivity of each phase regulator in the phase regulator set to the short-circuit capacity of each bus in the bus set, including:

[0033] For any condenser j, set the state to outage, form an impedance matrix including branch impedance, generator and condenser impedance, and calculate the first equivalent impedance Z of any bus i to ground eq i 0 ;

[0034] Set the state of phase condenser j to operation, form an impedance matrix including branch impedance, generator and phase condenser impedance, and calculate the second equivalent impedance Z of any bus i to ground eq i 1 ;

[0035] Determine the sensitivity L of condenser j to the short-circuit capacity of bus i C j-i Z eq i 0 / Z eq i 1 -1.

[0036] Preferably, the equivalent power sensitivity calculation unit calculates the sensitivity of each phase regulator in the phase regulator set to the equivalent power of each bus in the bus set, including:

[0037] For any phase regulator j, set the state to shutdown, form an impedance matrix including branch impedance, generator and phase regulator impedance, and calculate the first equivalent power at any bus i for each new energy unit k in the new energy generation set.

[0038] Set the state of phase condenser j to operation, form an impedance matrix including branch impedance, generator and phase condenser impedance, and calculate the second equivalent power at any bus i for each new energy unit k in the new energy generation set

[0039] Calculate the sensitivity L of condenser j to the equivalent power of bus i P j-i for

[0040] Among them, P k is the power of the new energy unit k; Z eq i 0 is the first equivalent impedance to ground of any busbar i; Z i-k 0 is the mutual impedance between busbar i and new energy unit k when condenser j is out of service; Set NR For renewable energy generation collection; Z eq i 1 is the second equivalent impedance to ground of any busbar i; Z i-k 1 It is the mutual impedance between bus i and new energy unit k when phase regulator j is in operation.

[0041] Preferably, the short-circuit ratio sensitivity calculation unit calculates the sensitivity of each phase regulator in the phase regulator set to the new energy short-circuit ratio of each bus in the bus set based on the sensitivity of the short-circuit capacity of each bus and the sensitivity of the equivalent power of each bus, including:

[0042] L D j-i =L C j-i ×L P j-i ,

[0043] Among them, L D j-i is the sensitivity of condenser j to the new energy short-circuit ratio of bus i; LC j-i is the sensitivity of phase regulator j to the short-circuit capacity of bus i; L P j-i is the sensitivity of condenser j to the equivalent power of bus i.

[0044] Preferably, the decision unit performs auxiliary startup decision of the distributed phase regulator according to the sensitivity of each phase regulator to the new energy short-circuit ratio of each bus in the bus set, including:

[0045] For any phase regulator j, its overall sensitivity to the busbar set with the short-circuit ratio exceeding the limit of renewable energy is calculated as follows: Among them, Set OV It is the busbar set with the new energy short-circuit ratio exceeding the limit;

[0046] Press L D j The phase regulators in the phase regulator set are sorted from large to small, and the states of the phase regulators are set to operation one by one according to the phase regulator order, and the new energy short-circuit ratio of each bus in the bus set with the new energy short-circuit ratio exceeding the limit is recalculated until the new energy short-circuit ratio of each bus in the bus set with the new energy short-circuit ratio exceeding the limit is greater than the preset new energy short-circuit ratio threshold.

[0047] Based on another aspect of the present invention, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements any step of a method for assisting decision-making on the short-circuit ratio of new energy for a distributed phase regulator.

[0048] According to another aspect of the present invention, the present invention provides an electronic device, including:

[0049] The computer-readable storage medium described above; and

[0050] One or more processors are used to execute the program in the computer-readable storage medium.

[0051] The present invention provides a new energy short-circuit ratio auxiliary decision-making method and system considering distributed phase regulators, including: determining a bus set whose new energy short-circuit ratio exceeds a limit; calculating the sensitivity of each phase regulator in the phase regulator set to the short-circuit capacity of each bus in the bus set; calculating the sensitivity of each phase regulator in the phase regulator set to the equivalent power of each bus in the bus set; calculating the sensitivity of each phase regulator in the phase regulator set to the new energy short-circuit ratio of each bus in the bus set based on the sensitivity of the short-circuit capacity of each bus and the sensitivity of the equivalent power of each bus; and making auxiliary decision on the startup of distributed phase regulators according to the sensitivity of each phase regulator to the new energy short-circuit ratio of each bus in the bus set. The present invention can find out the distributed phase regulator that is most effective in improving the short-circuit ratio of new energy on the over-limit bus by online calculating the sensitivity of the newly opened distributed phase regulator to the short-circuit ratio of new energy on the over-limit bus, and support the dispatching and operation personnel to eliminate the safety problem of the new energy short-circuit ratio exceeding the limit by adjusting the distributed phase regulator; the present invention can control the distributed phase regulator when the new energy short-circuit ratio does not meet the requirements, which is helpful to improve the voltage support capacity of the power grid and provide support for improving the new energy consumption capacity on the basis of power grid safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] A more complete understanding of exemplary embodiments of the present invention may be obtained by referring to the following drawings:

[0053] Figure 1 It is a flow chart of a new energy short-circuit ratio auxiliary decision-making method 100 considering distributed phase regulators according to an embodiment of the present invention;

[0054] Figure 2 Schematic diagram of the structure of a new energy short-circuit ratio auxiliary decision-making system 200 considering distributed phase regulators according to an embodiment of the present invention. DETAILED DESCRIPTION

[0055] Now, exemplary embodiments of the present invention are described with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely and to fully convey the scope of the present invention to those skilled in the art. The terms used in the exemplary embodiments shown in the accompanying drawings are not intended to limit the present invention. In the accompanying drawings, the same units / elements are marked with the same reference numerals.

[0056] Unless otherwise specified, the terms (including technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is understood that the terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0057] The present invention proposes a new energy short-circuit ratio auxiliary decision-making system considering distributed phase-shifting. First, find the busbar set with the new energy short-circuit ratio exceeding the limit, then calculate the sensitivity of the distributed phase-shifting startup to the busbar short-circuit capacity, calculate the sensitivity of the distributed phase-shifting startup to the new energy short-circuit ratio equivalent power, calculate the sensitivity of the distributed phase-shifting startup to the new energy short-circuit ratio, and finally calculate the auxiliary decision of the distributed phase-shifting startup.

[0058] Figure 1 1 is a flow chart of a new energy short-circuit ratio auxiliary decision method 100 considering distributed phase regulators according to an embodiment of the present invention. Figure 1 As shown, the auxiliary decision-making method for the short-circuit ratio of new energy sources considering distributed phase regulators provided by the embodiment of the present invention can find the most effective distributed phase regulator for improving the short-circuit ratio of new energy sources of over-limit buses by online calculating the sensitivity of newly opened distributed phase regulators to the short-circuit ratio of new energy sources of over-limit buses, and support dispatching and operating personnel to eliminate the safety problem of over-limit short-circuit ratio of new energy sources by adjusting distributed phase regulators; it can control distributed phase regulators when the short-circuit ratio of new energy sources does not meet the requirements, which is helpful to improve the voltage support capacity of the power grid and provide support for improving the absorption capacity of new energy sources on the basis of power grid safety. The auxiliary decision-making method 100 for the short-circuit ratio of new energy sources considering distributed phase regulators provided by the embodiment of the present invention starts from step 101. In step 101, a set of buses with over-limit short-circuit ratio of new energy sources is determined.

[0059] In the present invention, the short-circuit ratio of the new energy machine end is obtained, and a bus set Set whose new energy short-circuit ratio is less than a preset new energy short-circuit ratio threshold value of 1.5 is selected. OV .

[0060] In step 102, the sensitivity of each phase regulator in the phase regulator set to the short-circuit capacity of each bus in the bus set is calculated.

[0061] Preferably, the step of calculating the sensitivity of each phase regulator in the phase regulator set to the short-circuit capacity of each bus in the bus set comprises:

[0062] For any condenser j, set the state to outage, form an impedance matrix including branch impedance, generator and condenser impedance, and calculate the first equivalent impedance Z of any bus i to ground eq i 0 ;

[0063] Set the state of phase condenser j to operation, form an impedance matrix including branch impedance, generator and phase condenser impedance, and calculate the second equivalent impedance Z of any bus i to ground eq i 1 ;

[0064] Determine the sensitivity L of condenser j to the short-circuit capacity of bus i C j-i Z eq i 0 / Z eq i 1 -1.

[0065] In the present invention, it is necessary to calculate the sensitivity of the distributed phase regulator startup to the bus short-circuit capacity, including: for each of the bus sets Set with the new energy short-circuit ratio exceeding the limit found in step 101, OV The busbar i in the calculation is calculated one by one. The phase-shifting set Set UN The sensitivity of each phase regulator j to the short-circuit capacity of bus i.

[0066] Specifically, it includes: firstly, setting the state of phase condenser j to shutdown, forming an impedance matrix including branch impedance, generator and phase condenser impedance, and calculating the equivalent impedance Z of bus i to ground eq i 0 Then the state of phase condenser j is set to operation, an impedance matrix including branch impedance, generator and phase condenser impedance is formed, and the equivalent impedance to ground Z of bus i is calculated. eq i 1 , the sensitivity of phase regulator j to the short-circuit capacity of bus i is L C j-i Z eq i 0 / Z eq i 1 -1.

[0067] In step 103, the sensitivity of each phase modulator in the phase modulator set to the equivalent power of each bus in the bus set is calculated.

[0068] Preferably, the step of calculating the sensitivity of each phase modulator in the phase modulator set to the equivalent power of each bus in the bus set comprises:

[0069] For any phase regulator j, set the state to shutdown, form an impedance matrix including branch impedance, generator and phase regulator impedance, and calculate the first equivalent power at any bus i for each new energy unit k in the new energy generation set.

[0070] Set the state of phase condenser j to operation, form an impedance matrix including branch impedance, generator and phase condenser impedance, and calculate the second equivalent power at any bus i for each new energy unit k in the new energy generation set

[0071] Calculate the sensitivity L of condenser j to the equivalent power of bus i P j-i for

[0072] Among them, P k is the power of the new energy unit k; Z eq i 0 is the first equivalent impedance to ground of any busbar i; Z i-k 0 is the mutual impedance between busbar i and new energy unit k when condenser j is out of service; Set NR For renewable energy generation collection; Z eq i 1 is the second equivalent impedance to ground of any busbar i; Z i-k 1 It is the mutual impedance between bus i and new energy unit k when phase condenser j is in operation.

[0073] In the present invention, it is necessary to calculate the sensitivity of the distributed phase regulator startup to the equivalent power of the new energy short-circuit ratio, including: for each bus set Set with the new energy short-circuit ratio exceeding the limit found in step 101, OV The busbar i in the calculation is calculated one by one. The phase-shifting set Set UN The sensitivity of each phase regulator j to the equivalent power of bus i.

[0074] Specifically, it includes: firstly, setting the state of phase condenser j to shutdown, forming an impedance matrix including branch impedance, generator and phase condenser impedance, and for the new energy generation set Set NR Each new energy unit k in the k , calculate the equivalent impedance Z of busbar i to ground eq i 0 , the mutual impedance Z between busbar i and new energy unit k i-k 0 , calculate the equivalent power at bus i Then the state of phase condenser j is set to operation, forming an impedance matrix including branch impedance, generator and phase condenser impedance, and calculating the equivalent impedance Z of bus i to ground eq i 1 , the mutual impedance Z between busbar i and new energy unit k i-k 1 , calculate the equivalent power at bus i The sensitivity of condenser j to the equivalent power of bus i is L Pj-i for

[0075] In step 104, based on the sensitivity of the short-circuit capacity of each bus and the sensitivity of the equivalent power of each bus, the sensitivity of each phase regulator in the phase regulator set to the new energy short-circuit ratio of each bus in the bus set is calculated.

[0076] Preferably, the step of calculating the sensitivity of each phase regulator in the phase regulator set to the new energy short-circuit ratio of each bus in the bus set based on the sensitivity of the short-circuit capacity of each bus and the sensitivity of the equivalent power of each bus comprises:

[0077] L D j-i =L C j-i ×L P j-i ,

[0078] Among them, L D j-i is the sensitivity of condenser j to the new energy short-circuit ratio of bus i; L C j-i is the sensitivity of phase regulator j to the short-circuit capacity of bus i; L P j-i is the sensitivity of condenser j to the equivalent power of bus i.

[0079] In the present invention, the sensitivity of the distributed phase-converter startup to the equivalent power of the renewable energy short-circuit ratio is calculated based on the results of steps 102 and 103. Specifically, it includes: for each of the bus sets Set with renewable energy short-circuit ratio exceeding the limit found in step 101, OV The busbar i in the calculation is calculated one by one. The phase-shifting set Set UN The sensitivity L of each condenser j to the new energy short-circuit ratio of bus i D j-i =L C j-i ×L P j-i .

[0080] In step 105, a startup auxiliary decision of the distributed phase regulator is performed according to the sensitivity of each phase regulator to the new energy short-circuit ratio of each bus in the bus set.

[0081] Preferably, the step of making a startup auxiliary decision of the distributed phase regulator according to the sensitivity of each phase regulator to the new energy short-circuit ratio of each bus in the bus set includes:

[0082] For any phase regulator j, its overall sensitivity to the busbar set with the short-circuit ratio exceeding the limit of renewable energy is calculated as follows: Among them, Set OV It is the busbar set with the new energy short-circuit ratio exceeding the limit;

[0083] Press L D j The phase regulators in the phase regulator set are sorted from large to small, and the states of the phase regulators are set to operation one by one according to the phase regulator order, and the new energy short-circuit ratio of each bus in the bus set with the new energy short-circuit ratio exceeding the limit is recalculated until the new energy short-circuit ratio of each bus in the bus set with the new energy short-circuit ratio exceeding the limit is greater than the preset new energy short-circuit ratio threshold.

[0084] In the present invention, when the distributed phase regulator startup auxiliary decision is performed, for the phase regulator set Set UN For each phase regulator j, calculate its bus set Set for the new energy short-circuit ratio exceeding the limit OV The overall sensitivity Then, press L D j Swap camera set from large to small UN Sort the phase regulators, set the phase regulator status to operation one by one, and recalculate the bus set Set with the new energy short-circuit ratio exceeding the limit OV The new energy short-circuit ratio of each bus in the set Set OV The operation stops when the new energy short-circuit ratio of each bus is greater than the preset new energy short-circuit ratio threshold of 1.5.

[0085] The method of the present invention can control the distributed phase regulator when the short-circuit ratio of the new energy does not meet the requirements, which helps to improve the voltage support capacity of the power grid and provide support for improving the new energy consumption capacity on the basis of power grid safety.

[0086] Figure 2 Schematic diagram of the structure of the new energy short-circuit ratio auxiliary decision system 200 considering the distributed phase regulator according to the embodiment of the present invention. Figure 2 As shown, the new energy short-circuit ratio auxiliary decision-making system 200 considering distributed phase-shifting devices provided in an embodiment of the present invention includes: a bus set determination unit 201, a short-circuit capacity sensitivity calculation unit 202, an equivalent power sensitivity calculation unit 203, a short-circuit ratio sensitivity calculation unit 204 and a decision unit 205.

[0087] Preferably, the bus set determining unit 201 is used to determine a bus set whose new energy short-circuit ratio exceeds a limit.

[0088] Preferably, the short-circuit capacity sensitivity calculation unit 202 is used to calculate the sensitivity of each phase regulator in the phase regulator set to the short-circuit capacity of each bus in the bus set.

[0089] Preferably, the short-circuit capacity sensitivity calculation unit 202 calculates the sensitivity of each phase regulator in the phase regulator set to the short-circuit capacity of each bus in the bus set, including:

[0090] For any condenser j, set the state to outage, form an impedance matrix including branch impedance, generator and condenser impedance, and calculate the first equivalent impedance Z of any bus i to ground eq i 0 ;

[0091] Set the state of phase condenser j to operation, form an impedance matrix including branch impedance, generator and phase condenser impedance, and calculate the second equivalent impedance Z of any bus i to ground eq i 1 ;

[0092] Determine the sensitivity L of condenser j to the short-circuit capacity of bus i C j-i Z eq i 0 / Z eq i 1 -1.

[0093] Preferably, the equivalent power sensitivity calculation unit 203 is used to calculate the sensitivity of each phase modulator in the phase modulator set to the equivalent power of each bus in the bus set.

[0094] Preferably, the equivalent power sensitivity calculation unit 203 calculates the sensitivity of each phase regulator in the phase regulator set to the equivalent power of each bus in the bus set, including:

[0095] For any phase regulator j, set the state to shutdown, form an impedance matrix including branch impedance, generator and phase regulator impedance, and calculate the first equivalent power at any bus i for each new energy unit k in the new energy generation set.

[0096] Set the state of phase condenser j to operation, form an impedance matrix including branch impedance, generator and phase condenser impedance, and calculate the second equivalent power at any bus i for each new energy unit k in the new energy generation set

[0097] Calculate the sensitivity L of condenser j to the equivalent power of bus i P j-i for

[0098] Among them, Pk is the power of the new energy unit k; Z eq i 0 is the first equivalent impedance to ground of any busbar i; Z i-k 0 is the mutual impedance between busbar i and new energy unit k when condenser j is out of service; Set NR For renewable energy generation collection; Z eq i 1 is the second equivalent impedance to ground of any busbar i; Z i-k 1 It is the mutual impedance between bus i and new energy unit k when phase regulator j is in operation.

[0099] Preferably, the short-circuit ratio sensitivity calculation unit 204 is used to calculate the sensitivity of each phase regulator in the phase regulator set to the new energy short-circuit ratio of each bus in the bus set based on the sensitivity of the short-circuit capacity of each bus and the sensitivity of the equivalent power of each bus.

[0100] Preferably, the short-circuit ratio sensitivity calculation unit 204 calculates the sensitivity of each phase regulator in the phase regulator set to the new energy short-circuit ratio of each bus in the bus set based on the sensitivity of the short-circuit capacity of each bus and the sensitivity of the equivalent power of each bus, including:

[0101] L D j-i =L C j-i ×L P j-i ,

[0102] Among them, L D j-i is the sensitivity of condenser j to the new energy short-circuit ratio of bus i; L C j-i is the sensitivity of phase regulator j to the short-circuit capacity of bus i; L P j-i is the sensitivity of condenser j to the equivalent power of bus i.

[0103] Preferably, the decision unit 205 is used to make auxiliary startup decisions of distributed phase regulators according to the sensitivity of each phase regulator to the new energy short-circuit ratio of each bus in the bus set.

[0104] Preferably, the decision unit 205 performs a startup auxiliary decision of the distributed phase regulator according to the sensitivity of each phase regulator to the new energy short-circuit ratio of each bus in the bus set, including:

[0105] For any phase regulator j, its overall sensitivity to the busbar set with the short-circuit ratio exceeding the limit of renewable energy is calculated as follows: Among them, Set OV It is the busbar set with the new energy short-circuit ratio exceeding the limit;

[0106] Press L D j The phase regulators in the phase regulator set are sorted from large to small, and the states of the phase regulators are set to operation one by one according to the phase regulator order, and the new energy short-circuit ratio of each bus in the bus set with the new energy short-circuit ratio exceeding the limit is recalculated until the new energy short-circuit ratio of each bus in the bus set with the new energy short-circuit ratio exceeding the limit is greater than the preset new energy short-circuit ratio threshold.

[0107] The new energy short-circuit ratio auxiliary decision system 200 considering distributed phase regulators in an embodiment of the present invention corresponds to the new energy short-circuit ratio auxiliary decision method 100 considering distributed phase regulators in another embodiment of the present invention, which will not be repeated here.

[0108] Based on another aspect of the present invention, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements any step of a new energy short-circuit ratio auxiliary decision-making method considering distributed phase regulators.

[0109] According to another aspect of the present invention, the present invention provides an electronic device, including:

[0110] The computer-readable storage medium described above; and

[0111] One or more processors are used to execute the program in the computer-readable storage medium.

[0112] The invention has been described above with reference to a few embodiments. However, it is readily apparent to a person skilled in the art that other embodiments than the ones disclosed above are equally within the scope of the invention, as defined by the appended patent claims.

[0113] 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 / said / the [means, components, etc.]" are to be openly interpreted as at least one instance of said means, components, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not necessarily have to be performed in the exact order disclosed, unless explicitly stated otherwise.

[0114] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0115] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0116] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0117] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0118] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A new energy short-circuit ratio auxiliary decision-making method considering distributed phase regulators, characterized in that: The method comprises: Determine the busbar set where the short-circuit ratio of new energy exceeds the limit; Calculating the sensitivity of each phase regulator in the phase regulator set to the short-circuit capacity of each bus in the bus set; Calculating the sensitivity of each phase regulator in the phase regulator set to the equivalent power of each bus in the bus set; Calculate the sensitivity of each phase regulator in the phase regulator set to the new energy short-circuit ratio of each bus in the bus set based on the sensitivity of the short-circuit capacity of each bus and the sensitivity of the equivalent power of each bus; An auxiliary startup decision of the distributed phase regulator is performed according to the sensitivity of each phase regulator to the new energy short-circuit ratio of each bus in the bus set.

2. The method according to claim 1, characterized in that The calculating the sensitivity of each phase regulator in the phase regulator set to the short-circuit capacity of each bus in the bus set includes: For any condenser j, set the state to outage, form an impedance matrix including branch impedance, generator and condenser impedance, and calculate the first equivalent impedance Z of any bus i to ground eq i 0 ; Set the state of phase condenser j to operation, form an impedance matrix including branch impedance, generator and phase condenser impedance, and calculate the second equivalent impedance Z of any bus i to ground eq i 1 ; Determine the sensitivity L of condenser j to the short-circuit capacity of bus i C j-i Z eq i 0 / Z eq i 1 -1.

3. The method according to claim 1, characterized in that: The calculating the sensitivity of each phase regulator in the phase regulator set to the equivalent power of each bus in the bus set includes: For any phase regulator j, set the state to shutdown, form an impedance matrix including branch impedance, generator and phase regulator impedance, and calculate the first equivalent power at any bus i for each new energy unit k in the new energy generation set. Set the state of phase condenser j to operation, form an impedance matrix including branch impedance, generator and phase condenser impedance, and calculate the second equivalent power at any bus i for each new energy unit k in the new energy generation set Calculate the sensitivity L of condenser j to the equivalent power of bus i P j-i for Among them, P k is the power of the new energy unit k; Z eq i 0 is the first equivalent impedance to ground of any busbar i; Z i-k 0 is the mutual impedance between busbar i and new energy unit k when condenser j is out of service; Set NR For renewable energy generation collection; Z eq i 1 is the second equivalent impedance to ground of any busbar i; Z i-k 1 It is the mutual impedance between bus i and new energy unit k when phase condenser j is in operation.

4. The method according to claim 1, characterized in that: The step of calculating the sensitivity of each phase regulator in the phase regulator set to the new energy short-circuit ratio of each bus in the bus set based on the sensitivity of the short-circuit capacity of each bus and the sensitivity of the equivalent power of each bus, comprises: L D j-i =L C j-i ×L P j-i , Among them, L D j-i is the sensitivity of condenser j to the new energy short-circuit ratio of bus i; L C j-i is the sensitivity of phase regulator j to the short-circuit capacity of bus i; L P j-i is the sensitivity of condenser j to the equivalent power of bus i.

5. The method according to claim 1, characterized in that The method of making a startup auxiliary decision of a distributed phase regulator according to the sensitivity of each phase regulator to the new energy short-circuit ratio of each bus in the bus set includes: For any phase regulator j, its overall sensitivity to the busbar set with the short-circuit ratio exceeding the limit of renewable energy is calculated as follows: Among them, Set OV It is the busbar set with the new energy short-circuit ratio exceeding the limit; Press L D j The phase regulators in the phase regulator set are sorted from large to small, and the states of the phase regulators are set to operation one by one according to the phase regulator order, and the new energy short-circuit ratio of each bus in the bus set with the new energy short-circuit ratio exceeding the limit is recalculated until the new energy short-circuit ratio of each bus in the bus set with the new energy short-circuit ratio exceeding the limit is greater than the preset new energy short-circuit ratio threshold.

6. A new energy short-circuit ratio auxiliary decision-making system considering distributed phase regulators, characterized in that: The system comprises: A busbar set determination unit, used to determine a busbar set with an over-limit short-circuit ratio of new energy sources; A short-circuit capacity sensitivity calculation unit, used for calculating the sensitivity of each phase regulator in the phase regulator set to the short-circuit capacity of each bus in the bus set; An equivalent power sensitivity calculation unit, used for calculating the sensitivity of each phase regulator in the phase regulator set to the equivalent power of each bus in the bus set; A short circuit ratio sensitivity calculation unit, used for calculating the sensitivity of each phase regulator in the phase regulator set to the new energy short circuit ratio of each bus in the bus set based on the sensitivity of the short circuit capacity of each bus and the sensitivity of the equivalent power of each bus; A decision-making unit is used to make auxiliary startup decisions for distributed phase regulators according to the sensitivity of each phase regulator to the new energy short-circuit ratio of each bus in the bus set.

7. The system according to claim 6, characterized in that The short-circuit capacity sensitivity calculation unit calculates the sensitivity of each phase regulator in the phase regulator set to the short-circuit capacity of each bus in the bus set, including: For any condenser j, set the state to outage, form an impedance matrix including branch impedance, generator and condenser impedance, and calculate the first equivalent impedance Z of any bus i to ground eq i 0 ; Set the state of phase condenser j to operation, form an impedance matrix including branch impedance, generator and phase condenser impedance, and calculate the second equivalent impedance Z of any bus i to ground eq i 1 ; Determine the sensitivity L of condenser j to the short-circuit capacity of bus i C j-i Z eq i 0 / Z eq i 1 -1.

8. The system according to claim 6, characterized in that The equivalent power sensitivity calculation unit calculates the sensitivity of each phase regulator in the phase regulator set to the equivalent power of each bus in the bus set, including: For any phase regulator j, set the state to shutdown, form an impedance matrix including branch impedance, generator and phase regulator impedance, and calculate the first equivalent power at any bus i for each new energy unit k in the new energy generation set. Set the state of phase condenser j to operation, form an impedance matrix including branch impedance, generator and phase condenser impedance, and calculate the second equivalent power at any bus i for each new energy unit k in the new energy generation set Calculate the sensitivity L of condenser j to the equivalent power of bus i P j-i for Among them, P k is the power of the new energy unit k; Z eq i 0 is the first equivalent impedance to ground of any busbar i; Z i-k 0 is the mutual impedance between busbar i and new energy unit k when condenser j is out of service; Set NR For renewable energy generation collection; Z eq i 1 is the second equivalent impedance to ground of any busbar i; Z i-k 1 It is the mutual impedance between bus i and new energy unit k when phase condenser j is in operation.

9. The system according to claim 6, characterized in that The short circuit ratio sensitivity calculation unit calculates the sensitivity of each phase regulator in the phase regulator set to the new energy short circuit ratio of each bus in the bus set based on the sensitivity of the short circuit capacity of each bus and the sensitivity of the equivalent power of each bus, including: L D j-i =L C j-i ×L P j-i , Among them, L D j-i is the sensitivity of condenser j to the new energy short-circuit ratio of bus i; L C j-i is the sensitivity of phase regulator j to the short-circuit capacity of bus i; L P j-i is the sensitivity of condenser j to the equivalent power of bus i.

10. The system according to claim 6, characterized in that The decision unit makes a startup auxiliary decision of the distributed phase regulator according to the sensitivity of each phase regulator to the new energy short-circuit ratio of each bus in the bus set, including: For any phase regulator j, its overall sensitivity to the busbar set with the short-circuit ratio exceeding the limit of renewable energy is calculated as follows: Among them, Set OV It is the busbar set with the new energy short-circuit ratio exceeding the limit; Press L D j The phase regulators in the phase regulator set are sorted from large to small, and the states of the phase regulators are set to operation one by one according to the phase regulator order, and the new energy short-circuit ratio of each bus in the bus set with the new energy short-circuit ratio exceeding the limit is recalculated until the new energy short-circuit ratio of each bus in the bus set with the new energy short-circuit ratio exceeding the limit is greater than the preset new energy short-circuit ratio threshold.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method according to any one of claims 1 to 5 are implemented.

12. An electronic device, characterized in that: include: The computer readable storage medium as claimed in claim 11; as well as One or more processors are used to execute the program in the computer-readable storage medium.

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