Multi-station combined phase modifier configuration determination method and device based on new energy

Abstract

The invention provides a new energy-based multi-station combined phase modifier configuration determination method and device. The corresponding method comprises the following steps: obtaining self-impedance of a machine end of each new energy station and mutual impedance between the machine end of each new energy station and machine ends of other new energy stations; determining a multi-infeed interaction factor of the machine end of each new energy station according to the self impedance and the mutual impedance; wherein the multi-infeed interaction factor is used for representing the degree of influence between machine ends of a plurality of new energy stations; and determining the address and capacity of the phase modifier of each new energy station according to the multi-infeed interaction factor, the short-circuit ratio of the machine end of each new energy station and pre-generated economic evaluation parameters. According to the method, the phase modifier mounting point position capable of maximizing the system short-circuit ratio can be identified, and meanwhile, the configuration cost of the phase modifier is ensured to be lowest, so that the optimal balance between economic benefits and system performance improvement is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of power system planning and operation, and in particular to a method and device for determining phase-shifting configuration of a multi-station joint system based on new energy. Background Art

[0002] In the existing technology, problems such as transient overvoltage, low voltage and low inertia in large-scale new energy gathering areas are the main factors limiting the transmission capacity of new energy weak sending-end systems. The installed capacity of the gathering new energy stations is large, there is a lack of supporting power supplies in the nearby area, and the ability to resist the impact of system fault disturbances is poor. The low short-circuit ratio of many new energy stations and the prominent problems of transient overvoltage and low voltage after power grid failure are the main factors restricting the transmission of new energy. The transient overvoltage at the end of the new energy machine after the power grid failure is too high, which may cause the unit to be disconnected from the grid, or even a large-scale chain disconnection accident. Therefore, it is necessary to limit the output of new energy stations in the current operation to ensure the safe and stable operation of the system. In order to improve the level of regional new energy consumption, it is urgent to take targeted measures to solve the problem of low short-circuit ratio of new energy stations from the source. Summary of the invention

[0003] The method and device for determining phase-shifting configuration of multiple stations based on renewable energy provided by the present invention can greatly enhance the short-circuit capacity supporting capability of multiple renewable energy stations, thereby improving the safety and stability level of the power grid and enhancing the regional renewable energy transmission capacity.

[0004] In order to achieve the above objectives, in the first aspect, this party provides a method for determining phase-shifting configuration of multiple stations based on new energy, including:

[0005] Obtain the self-impedance of the machine end of each new energy station and the mutual impedance between the machine ends of other new energy stations;

[0006] Determine the multi-feed interaction factor of the machine end of each new energy site according to the self-impedance and the mutual impedance; wherein the multi-feed interaction factor is used to characterize the degree of influence between the machine ends of multiple new energy sites;

[0007] The address and capacity of the phase regulator of each new energy station are determined according to the multi-feed interaction factor, the short-circuit ratio of the machine end of each new energy station and the pre-generated economic evaluation parameters.

[0008] In some embodiments of the present invention, the short-circuit ratio is the ratio of voltage to current between a machine end of a current renewable energy station and a machine end of an adjacent renewable energy station when no phase regulator is installed in the multiple renewable energy stations.

[0009] In some embodiments of the present invention, the step of generating the economic evaluation parameters comprises:

[0010] The economic evaluation parameters are generated according to the power loss cost, construction cost and operation and maintenance cost of the new energy station.

[0011] In some embodiments of the present invention, a method for determining phase-shifting configuration of a multi-station joint power plant based on new energy sources further includes:

[0012] The power loss cost is determined according to the capacity of a single phase regulator, the number of phase regulators, the power loss rate of the single phase regulator, the operation time, the service life and the current electricity price.

[0013] In some embodiments of the present invention, a method for determining phase-shifting configuration of a multi-station joint power plant based on new energy sources further includes:

[0014] The construction cost is determined based on the unit construction cost and capacity of a single phase regulator and the number of phase regulators.

[0015] In a second aspect, the present invention provides a device for determining phase-shifting configuration of multiple stations based on new energy, the device comprising:

[0016] An impedance acquisition module is used to obtain the self-impedance of the machine end of each new energy station and the mutual impedance between the machine ends of other new energy stations;

[0017] An interaction factor determination module, used to determine the multi-feed interaction factor of the machine end of each new energy site according to the self-impedance and the mutual impedance; wherein the multi-feed interaction factor is used to characterize the degree of influence between the machine ends of multiple new energy sites;

[0018] The phase regulator configuration determination module is used to determine the address and capacity of the phase regulator of each new energy station according to the multi-feed interaction factor, the short-circuit ratio of the machine end of each new energy station and the pre-generated economic evaluation parameters.

[0019] In some embodiments of the present invention, the short-circuit ratio is the ratio of voltage to current between a machine end of a current renewable energy station and a machine end of an adjacent renewable energy station when no phase regulator is installed in the multiple renewable energy stations.

[0020] In some embodiments of the present invention, a multi-station joint phase-shifting configuration determination device based on new energy sources further includes:

[0021] An economic evaluation parameter generation module is used to generate the economic evaluation parameters; the economic evaluation parameter generation module includes:

[0022] The economic evaluation parameter generating unit is used to generate the economic evaluation parameters according to the power loss cost, construction cost and operation and maintenance cost of the new energy station.

[0023] In some embodiments of the present invention, a multi-station joint phase-shifting configuration determination device based on new energy sources further includes:

[0024] The power loss cost determination module is used to determine the power loss cost according to the capacity of a single phase regulator, the number of phase regulators, the power loss rate of the single phase regulator, the operating time, the working life and the current electricity price.

[0025] In some embodiments of the present invention, a multi-station joint phase-shifting configuration determination device based on new energy sources further includes:

[0026] The construction cost determination module is used to determine the construction cost according to the unit construction cost and capacity of a single phase regulator and the number of phase regulators.

[0027] In a third aspect, the present invention provides a computer program product, including a computer program / instruction, which, when executed by a processor, implements the steps of a method for determining a phase-shifting configuration of multiple stations based on new energy.

[0028] In a fourth aspect, the present invention provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the processor implements the steps of a method for determining a phase-shifting configuration of a multi-station joint system based on new energy.

[0029] In a fifth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of a method for determining a phase-shifting configuration of a multi-station joint system based on new energy.

[0030] From the above description, it can be seen that an embodiment of the present invention provides a method and device for determining the phase-shifting configuration of a multi-station joint power plant based on new energy. The corresponding method includes: first, obtaining the self-impedance of the machine end of each new energy station and the mutual impedance between the machine ends of other new energy stations; then, determining the multi-feed interaction factor of the machine end of each new energy station according to the self-impedance and the mutual impedance; wherein the multi-feed interaction factor is used to characterize the degree of influence between the machine ends of multiple new energy stations; finally, determining the address and capacity of the phase-shifting power plant of each new energy station according to the multi-feed interaction factor, the short-circuit ratio of the machine end of each new energy station and the pre-generated economic evaluation parameters.

[0031] The corresponding device includes: an impedance acquisition module, which is used to obtain the self-impedance of the machine end of each new energy station and the mutual impedance between the machine ends of other new energy stations; an interaction factor determination module, which is used to determine the multi-feed interaction factor of the machine end of each new energy station according to the self-impedance and the mutual impedance; wherein the multi-feed interaction factor is used to characterize the degree of influence between the machine ends of multiple new energy stations; a phase-shifting phase configuration determination module, which is used to determine the address and capacity of the phase-shifting phase of each new energy station according to the multi-feed interaction factor, the short-circuit ratio of the machine end of each new energy station and the pre-generated economic evaluation parameters.

[0032] In summary, the present invention can identify the phase modulator installation points that can maximize the short-circuit ratio of the system, while ensuring that the configuration cost of the phase modulator is minimized, thereby achieving the best balance between economic benefits and system performance improvement. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 A schematic diagram of a method for determining a phase-shifting configuration of a multi-station joint power plant based on renewable energy provided in an embodiment of the present invention Figure 1 ;

[0035] Figure 2 A schematic diagram of a method for determining a phase-shifting configuration of a multi-station joint power plant based on renewable energy provided in an embodiment of the present invention Figure 2 ;

[0036] Figure 3 A schematic diagram of the flow of step 400 provided in an embodiment of the present invention;

[0037] Figure 4 A schematic diagram of a method for determining a phase-shifting configuration of a multi-station joint power plant based on renewable energy provided in an embodiment of the present invention Figure 3 ;

[0038] Figure 5 A schematic diagram of a method for determining a phase-shifting configuration of a multi-station joint power plant based on renewable energy provided in an embodiment of the present invention Figure 4 ;

[0039] Figure 6 It is a flow chart of a method for determining phase-shifting configuration of multiple stations combined with new energy sources provided in a specific application example of the present invention;

[0040] Figure 7 A mind map of a method for determining phase-shifting configuration of a multi-station joint power plant based on new energy provided in a specific application example of the present invention;

[0041] Figure 8 A schematic diagram of the locations of multiple new energy stations provided in a specific application example of the present invention;

[0042] Fig. 9 A schematic diagram of a multi-station phase-shifting configuration determination device based on renewable energy provided in an embodiment of the present invention Figure 1 ;

[0043] Fig.10 A schematic diagram of a multi-station phase-shifting configuration determination device based on renewable energy provided in an embodiment of the present invention Figure 2 ;

[0044] Fig.11 It is a structural schematic diagram of the economic evaluation parameter generation module 40 provided in an embodiment of the present invention;

[0045] Fig.12 A schematic diagram of a multi-station phase-shifting configuration determination device based on renewable energy provided in an embodiment of the present invention Figure 3 ;

[0046] Fig.13 A schematic diagram of a multi-station phase-shifting configuration determination device based on renewable energy provided in an embodiment of the present invention Figure 4 ;

[0047] Fig.14 It is a schematic diagram of the structure of an electronic device in an embodiment of the present invention. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] 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.

[0050] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or apparatuses.

[0051] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0052] It is understandable that phase regulators can effectively improve the short-circuit capacity of the system, enhance the voltage support strength of the power grid, and improve the voltage support capacity of the power grid when disturbances occur. In the existing technology, large-scale phase regulators are mainly used in ultra-high voltage direct current to improve the phase commutation failure of the receiving system and suppress the overvoltage of the sending system. There is no experience to follow on how to deploy distributed phase regulators in new energy stations in the areas where new energy converges. For weak sending-end power grids with more complex stability mechanisms, due to the lack of directional analysis and calculation methods, trial and exhaustive methods are generally used to complete them, which is inefficient. In addition, due to constraints such as equipment cost and land cost, there is no engineering practical solution that takes into account both voltage support effect and cost investment.

[0053] Based on the above reasons, the embodiment of the present invention provides a specific implementation method of a multi-station joint phase-shifting configuration determination method based on new energy, see Figure 1 , the method specifically includes the following contents:

[0054] Step 100: Obtain the self-impedance of the machine end of each new energy station and the mutual impedance between the machine ends of other new energy stations;

[0055] Step 200: determining a multi-feed interaction factor of a machine end of each new energy station according to the self-impedance and the mutual impedance; wherein the multi-feed interaction factor is used to characterize the degree of influence between machine ends of multiple new energy stations;

[0056] Step 300: Determine the address and capacity of the phase regulator of each new energy station according to the multi-feed interaction factor, the short-circuit ratio of the generator end of each new energy station and the pre-generated economic evaluation parameters.

[0057] From the above description, it can be seen that an embodiment of the present invention provides a method for determining the phase-shifting configuration of a multi-station joint power plant based on new energy, comprising: first, obtaining the self-impedance of the machine end of each new energy station and the mutual impedance between the machine ends of other new energy stations; then, determining the multi-feed interaction factor of the machine end of each new energy station according to the self-impedance and the mutual impedance; wherein the multi-feed interaction factor is used to characterize the degree of influence between the machine ends of multiple new energy stations; finally, determining the address and capacity of the phase-shifting power plant of each new energy station according to the multi-feed interaction factor, the short-circuit ratio of the machine end of each new energy station and the pre-generated economic evaluation parameters.

[0058] In summary, the present invention determines the optimal phase regulator site selection and capacity configuration indicators to obtain the optimal phase regulator installation location and capacity, and finally obtains the node with the largest improvement in system short-circuit ratio after installing the phase regulator and the phase regulator configuration with the lowest cost.

[0059] In step 100, the self-impedance of each new energy station refers to the impedance of a single generator or inverter output terminal to its own current. It reflects the electrical characteristics of the device itself, including resistive and reactive components. Specifically:

[0060] Z ii =R i +X i

[0061] Among them, Zii is the machine-end self-impedance. Ri is the machine-end resistance component. Xi is the machine-end reactance component, including inductive reactance and capacitive reactance.

[0062] Mutual impedance refers to the voltage caused by the output current of one generator or inverter on other generators or inverters in a multi-unit system. It reflects the electromagnetic coupling effect between different devices. Specifically:

[0063] Z ij =R ij +X ij

[0064] Where, Zij is the mutual impedance at the machine end, Rij is the resistance component of the mutual impedance, and Xij is the reactance component of the mutual impedance.

[0065] It is understandable that self-impedance affects the voltage regulation and short-circuit current characteristics of a single unit. Mutual impedance affects the interaction between units, such as power transmission and fault propagation, which is very important for stabilizing the overall operation of new energy sites.

[0066] For step 200, the multi-input interaction factor MIIF is calculated:

[0067]

[0068] MIIF is calculated by the impedance between ij, Z ij is the impedance between nodes i and j; Z ii is the self-impedance of node i. The multi-input interaction factor MIIF can reflect the mutual influence between nodes i and j. The larger the multi-input interaction factor MIIF is, the higher the mutual influence between nodes i and j is, and vice versa.

[0069] In addition, an alternative method for step 200 is provided here, in which a reactance element is connected in parallel to the AC bus i, so that a preset amount (for example, 1%) of sudden voltage is generated on the bus i, and the proportion of the voltage change on the bus j is observed. The ratio of these two voltage changes is the multi-input interaction factor.

[0070] For step 300, based on the location of existing new energy stations, the selection and location of phase regulators are continuously iterated, and it is verified that the short-circuit ratio of the machine end of each new energy station is greater than the specified value of 1.5. The phase regulator configuration that meets the machine end short-circuit ratio requirements of all new energy stations is selected through iterative calculation. The optimal phase regulator installation location and capacity results can be output, that is, the node with the largest improvement in system short-circuit ratio after installing the phase regulator and the phase regulator configuration with the lowest cost.

[0071] In some embodiments of the present invention, the short-circuit ratio is the ratio of the voltage to the current between the machine end of the current new energy station and the machine end of its adjacent new energy station when the phase regulator is not installed in the multiple new energy stations. It is used to describe the short-circuit tolerance of the new energy power generation multi-field power station. One of the safe operation principles of the new energy multi-field power station is to ensure that the changes, abnormalities and short circuits of the power load in the system will not affect the normal operation of the generator, and its short-circuit ratio (SCR) is the most important indicator to measure this.

[0072] In some embodiments of the present invention, see Figure 2 , a method for determining phase-shifting configuration of multiple stations based on new energy, further comprising:

[0073] Step 400: Generate the economic evaluation parameters, then refer to Figure 3 , step 400 comprises:

[0074] Step 401: Generate the economic evaluation parameters according to the power loss cost, construction cost and operation and maintenance cost of the new energy station.

[0075] Calculation of economic evaluation parameter β i

[0076] β i =F 1 +F 2 +F 3

[0077] Among them, F 1 is the energy loss cost of the phase regulator, F 2 is the construction cost of the phase regulator, F 3 It is the operation and maintenance cost of the camera.

[0078] In some embodiments of the present invention, see Figure 4 , a method for determining phase-shifting configuration of multiple stations based on new energy, further comprising:

[0079] Step 500: Determine the power loss cost according to the capacity of a single phase regulator, the number of phase regulators, the power loss rate of the single phase regulator, the operation time, the service life and the current electricity price.

[0080] F 1 =Q t *N t *a*P*t*y

[0081] Among them, Q t is the phase regulator capacity, N t is the number of phase-modulators, a is the power loss rate, t is the operating time of the phase-modulators, P is the electricity price, and y is the working life of the phase-modulators.

[0082] In some embodiments of the present invention, see Figure 5 , a method for determining phase-shifting configuration of multiple stations based on new energy, further comprising:

[0083] Step 600: Determine the construction cost according to the unit construction cost and capacity of a single phase regulator and the number of phase regulators.

[0084] F 2 =Q t *N t *C

[0085] C is the unit construction cost of the phase regulator, 300 yuan / kVA for 50MVA level and 200 yuan / kVA for 300MVA level. In some embodiments of the present invention, the operation and maintenance costs for step 401 are:

[0086] F 3 =W X +W D

[0087] Among them, W X W is the cost of minor repairs to the phase regulator. DIt is the cost of overhauling the phase regulator. Generally, the phase regulator needs to be repaired every year, with a six-year cycle. In each cycle, the first five years are minor repairs, and the sixth year is a major overhaul. The working life of the phase regulator is 30 years.

[0088] From the above description, it can be seen that an embodiment of the present invention provides a method for determining the phase-shifting configuration of a multi-station joint power plant based on new energy, comprising: first, obtaining the self-impedance of the machine end of each new energy station and the mutual impedance between the machine ends of other new energy stations; then, determining the multi-feed interaction factor of the machine end of each new energy station according to the self-impedance and the mutual impedance; wherein the multi-feed interaction factor is used to characterize the degree of influence between the machine ends of multiple new energy stations; finally, determining the address and capacity of the phase-shifting power plant of each new energy station according to the multi-feed interaction factor, the short-circuit ratio of the machine end of each new energy station and the pre-generated economic evaluation parameters.

[0089] The method provided by the embodiment of the present invention is a multi-station joint phase shifter site selection calculation and capacity configuration method, which optimizes the phase shifter installation point and configuration capacity by calculating the optimal phase shifter site selection and capacity configuration indicators.

[0090] To further illustrate this solution, the present invention provides a specific application example of a method for determining phase-shifting configuration of multiple stations based on new energy sources, see Figure 6 as well as Figure 7 , specifically including the following steps.

[0091] In response to the problem of low short-circuit ratio of renewable energy stations mentioned in the background technology part of the present invention, the present invention proposes a specific application example of a multi-station joint phase-shifting machine site selection calculation and capacity configuration method, so as to improve the short-circuit capacity supporting capacity of multiple renewable energy stations, improve the safety and stability level of the power grid, and enhance the regional renewable energy transmission capacity.

[0092] S1: Collect data such as the mutual impedance and self-impedance matrix of each new energy machine end node.

[0093] S2: Calculate the short-circuit ratio of each renewable energy generator terminal node when the phase regulator is not installed, and calculate the multi-infeed interaction factor MIIF.

[0094] S3: Calculate the optimal phase-shifting unit location and capacity configuration parameters.

[0095] Based on the calculated MIIF and the short-circuit ratio SCR of each new energy machine end node, the optimal phase-converter location and capacity configuration parameter α are calculated. i :

[0096]

[0097] Where MIIF is the multi-input interaction factor; SCRi is the i-node short-circuit ratio.

[0098] S4: Calculate the installation configuration parameters of multi-station phase regulators.

[0099] Refer to the following formula to calculate γ i As the multi-station phase regulator installation configuration parameter, γ i Taking into account the physical performance short-circuit ratio of the condenser in multiple stations and the economic efficiency of the condenser installation, the feasibility and practicality of its installation are considered from multiple dimensions:

[0100]

[0101] In the formula, a and b are index coefficients. i Medium α i The larger the β i The smaller it is, the better the phase regulator installation is. Therefore, a is positive and b is negative. i The bigger the better.

[0102] By calculating the indicator γ i , continuously iterate the phase-converter selection and location plan, and verify that the SCR of each node is greater than the specified value of 1.5. Iterate the calculation until the phase-converter configuration that meets the short-circuit ratio requirements of all nodes is selected, and then the optimal phase-converter installation location and capacity results can be output, that is, the node with the largest improvement in system short-circuit ratio after installing the phase-converter and the phase-converter configuration with the lowest cost.

[0103] See also Figure 8 In this specific application example, the Yudaokou 500 kV substation G1 and seven new energy stations (Derun Wind Farm G2, Shengkun Nuanquan Photovoltaic Power Station G3, Tianqiaoshan Wind Farm G4, Jiantou Changfeng Wind Farm G5, Huarun Jiaodingshan Wind Farm G6, Langxun Shangtoudi Wind Farm G7, Tengyuan Zhitu Wind Farm G8) can provide construction sites for the phase-shifting unit project, while the remaining new energy stations cannot provide installation and layout sites for the phase-shifting units.

[0104] In view of the large number of nodes in the actual power network and the complex and changeable network structure, a certain degree of deviation may occur in the calculation of the index. In order to enhance the calculation efficiency of the index and effectively reduce the number of iterative calculations, this specific application example, based on the specific case, centrally arranges large-capacity phase-shifting condensers at the Yudaokou 500 kV substation to improve the overall short-circuit ratio level in the Yudaokou area. Distributed phase-shifting condensers are additionally arranged at weak sites with too low short-circuit ratios to ensure that the short-circuit ratios of all sites meet the requirements. The initial short-circuit ratio when the phase-shifting condenser is not installed is calculated using the power flow simulation software, and based on the initial situation, the output rate of the new energy stations in the Yudaokou area is increased to 70%, and a 300 MW phase-shifting condenser is arranged at the G1 Yudaokou station. The short-circuit ratio levels of each station are shown in Table 1.

[0105] Table 1 Short-circuit ratio of each station in the first round of iteration

[0106] Crescent Moon Derun Ruyi River Binglanggou Smart Path Auspicious Wind The Generals' Platform Jiaoding Mountain Changfeng 1.5 1.45 1.42 1.41 1.49 1.38 1.16 1.06 1.4 Woniu Pan Ulaha Huifeng Upper Momoyama Warm Springs Nari River Flyover Hill 1.38 1.45 1.33 1.21 1.51 1.68 1.37 1.46

[0107] It can be seen from the calculation results in Table 1 that the short-circuit ratio of most stations did not reach 1.5. On this basis, a second round of iteration was carried out, considering the deployment of a second 300 MW phase-converter at the Yudaokou 500 kV station. The short-circuit ratio levels of each station are shown in Table 2.

[0108] Table 2 Short-circuit ratio of each station in the second iteration

[0109] Crescent Moon Derun Ruyi River Binglanggou Smart Path Auspicious Wind The Generals' Platform Jiaoding Mountain Changfeng 1.75 1.68 1.64 1.62 1.73 1.59 1.3 1.17 1.6 Woniu Pan Ulaha Huifeng Upper Momoyama Warm Springs Nari River Flyover Hill 1.58 1.69 1.53 1.36 1.75 2 1.58 1.69

[0110] It can be seen from Table 2 that the stations that still do not meet the short-circuit ratio requirement of 1.5 are Jiaodingshan, Dianjiangtai and Langcheng Shangtoudi wind farms. By calculating the optimal phase-shifting phase site selection and capacity configuration indicators, the capacity of these three wind farms is configured.

[0111] According to the calculation of the optimal phase shifter location and capacity configuration parameter α i The optimal phase shifter location and capacity configuration parameter values ​​of Jiaodingshan are the highest, and the optimal phase shifter location and capacity configuration parameter values ​​of Dianjiangtai are the lowest. Therefore, it is considered to deploy distributed phase shifters in Jiaodingshan, Langcheng Shangtoudi Wind Farm, and Dianjiangtai in turn, see Table 3.

[0112] Plan 1: Deploy one 50 MW and one 10 MW distributed phase regulator at Jiaodingshan and Langcheng Shangtoudi wind farms.

[0113] Plan 2: Deploy two 20 MW phase shifters, one 10 MW phase shifter and one 10 MW phase shifter at Jiaodingshan, Langcheng Shangtoudi Wind Farm and Dianjiangtai.

[0114] Table 3 Economic evaluation parameters β of different schemes i

[0115]

[0116] According to the calculation of economic evaluation parameter β i Option 1: Consider deploying one 50 MW and one 10 MW distributed phase regulator at Jiaodingshan and Langcheng Shangtoudi wind farms.

[0117] After calculation, according to the final short-circuit ratio of each station as shown in Table 4, the output power of Yudaokou 500 kV substation can be increased to 2.007 million kW. At the same time, the short-circuit ratio of all new energy stations meets the requirement of being greater than 1.5.

[0118] Table 4 Final short-circuit ratio of each station

[0119] Crescent Moon Derun Ruyi River Binglanggou Smart Path Auspicious Wind The Generals' Platform Jiaoding Mountain Changfeng 1.84 1.76 1.72 1.70 1.82 1.72 1.57 1.58 1.67 Woniu Pan Ulaha Huifeng Upper Momoyama Warm Springs Nari River Flyover Hill 1.65 1.77 1.63 1.56 1.84 2.11 1.65 1.77

[0120] The final phase-shifting configuration scheme is shown in Table 5:

[0121] Table 5 Phase condenser capacity distribution of each station

[0122]

[0123] In this specific application example, a and b are simply set to 1 and -1, and can also be adjusted according to actual considerations of the weight relationship between technical indicators and economic indicators.

[0124] From the above description, it can be seen that a specific application example of the present invention proposes a method for determining the configuration of a phase-shifting device for a multi-station joint operation based on new energy, comprising: first, obtaining the self-impedance of the machine end of each new energy station and the mutual impedance between the machine ends of other new energy stations; then, determining the multi-feed interaction factor of the machine end of each new energy station according to the self-impedance and the mutual impedance; wherein the multi-feed interaction factor is used to characterize the degree of influence between the machine ends of multiple new energy stations; finally, determining the address and capacity of the phase-shifting device of each new energy station according to the multi-feed interaction factor, the short-circuit ratio of the machine end of each new energy station and the pre-generated economic evaluation parameters.

[0125] Specifically, the above method uses the collected data to evaluate the degree of improvement of the system short-circuit ratio after the phase regulator is installed at each node, and selects the node with the most significant improvement effect as the pre-selected location. The node with the highest improvement index means that the phase regulator can be installed here to most effectively enhance the system short-circuit ratio. After completing the preliminary calculation of the phase regulator deployment location, a verification step is performed to check whether the system short-circuit ratio has reached the preset performance index after this layout adjustment.

[0126] Furthermore, if the analysis confirms that the system short-circuit ratio has reached the standard, the algorithm will terminate immediately and formally determine the optimal installation node location as the output result. On the contrary, if the evaluation feedback shows that the short-circuit ratio still does not meet the expected standard, the algorithm will not terminate, but will immediately restart a new round of site selection optimization calculations to identify the nodes with the greatest potential for improving the short-circuit ratio in the next stage. This iterative calculation and optimization process will continue to be executed in a loop, constantly refining the installation location decision until the system short-circuit ratio satisfactorily meets the established requirements. Through repeated trials and step-by-step optimization strategies, we strive to ensure that the phase shifter deployment strategy can most efficiently promote system performance improvement.

[0127] Based on the same inventive concept, the embodiments of the present application also provide a device for determining the configuration of a phase regulator based on a multi-station combination of new energy sources, which can be used to implement the methods described in the above embodiments, such as the following embodiments. Since the principle of solving the problem by the device for determining the configuration of a phase regulator based on a multi-station combination of new energy sources is similar to the method for determining the configuration of a phase regulator based on a multi-station combination of new energy sources, the implementation of the device for determining the configuration of a phase regulator based on a multi-station combination of new energy sources can refer to the implementation of the method for determining the configuration of a phase regulator based on a multi-station combination of new energy sources, and the repeated parts will not be repeated. As used below, the terms "unit" or "module" can be a combination of software and / or hardware that implements predetermined functions. Although the system described in the following embodiments is preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceived.

[0128] The embodiment of the present invention provides a specific implementation of a multi-station-coordinated phase-shifting configuration determination device based on new energy, which can realize a multi-station-coordinated phase-shifting configuration determination method based on new energy, see Fig. 9 A multi-station phase-shifting configuration determination device based on new energy specifically includes the following contents:

[0129] The impedance acquisition module 10 is used to obtain the self-impedance of the machine end of each new energy station and the mutual impedance between the machine ends of other new energy stations;

[0130] An interaction factor determination module 20 is used to determine the multi-feed interaction factor of the machine end of each new energy site according to the self-impedance and the mutual impedance; wherein the multi-feed interaction factor is used to characterize the degree of influence between the machine ends of multiple new energy sites;

[0131] The phase regulator configuration determination module 30 is used to determine the address and capacity of the phase regulator of each new energy station according to the multi-feed interaction factor, the short-circuit ratio of the machine end of each new energy station and the pre-generated economic evaluation parameters.

[0132] In some embodiments of the present invention, the short-circuit ratio is the ratio of voltage to current between a machine end of a current renewable energy station and a machine end of an adjacent renewable energy station when no phase regulator is installed in the multiple renewable energy stations.

[0133] In some embodiments of the present invention, see Fig.10 , a multi-station joint phase-shifting configuration determination device based on new energy, further comprising:

[0134] The economic evaluation parameter generation module 40 is used to generate the economic evaluation parameters; see Fig.11 , the economic evaluation parameter generation module 40 includes:

[0135] The economic evaluation parameter generating unit 40a is used to generate the economic evaluation parameters according to the power loss cost, construction cost and operation and maintenance cost of the new energy station.

[0136] In some embodiments of the present invention, see Fig.12 , a multi-station joint phase-shifting configuration determination device based on new energy, further comprising:

[0137] The power loss cost determination module 50 is used to determine the power loss cost according to the capacity of a single phase regulator, the number of phase regulators, the power loss rate of the single phase regulator, the operation time, the service life and the current electricity price.

[0138] In some embodiments of the present invention, see Fig.13 , a multi-station joint phase-shifting configuration determination device based on new energy, further comprising:

[0139] The construction cost determination module 60 is used to determine the construction cost according to the unit construction cost and capacity of a single phase regulator and the number of phase regulators.

[0140] From the above description, it can be seen that an embodiment of the present invention provides a phase-shifting configuration determination device for a multi-station joint operation based on new energy, including: an impedance acquisition module, used to obtain the self-impedance of the machine end of each new energy station and the mutual impedance between the machine ends of other new energy stations; an interaction factor determination module, used to determine the multi-feed interaction factor of the machine end of each new energy station according to the self-impedance and the mutual impedance; wherein the multi-feed interaction factor is used to characterize the degree of influence between the machine ends of multiple new energy stations; a phase-shifting configuration determination module, used to determine the address and capacity of the phase-shifting device of each new energy station according to the multi-feed interaction factor, the short-circuit ratio of the machine end of each new energy station and the pre-generated economic evaluation parameters.

[0141] Specifically, the collected data is used to evaluate the degree of improvement in the system short-circuit ratio after the installation of the phase regulator at each node, and the node with the most significant improvement effect is selected as the pre-selected location. The node with the highest improvement index means that the phase regulator can be installed here to most effectively enhance the system short-circuit ratio. After completing the preliminary calculation of the phase regulator deployment location, a verification step is performed to check whether the system short-circuit ratio has reached the preset performance index after this layout adjustment.

[0142] Furthermore, if the analysis confirms that the system short-circuit ratio has reached the standard, the algorithm will terminate immediately and formally determine the optimal installation node location as the output result. On the contrary, if the evaluation feedback shows that the short-circuit ratio still does not meet the expected standard, the algorithm will not terminate, but will immediately restart a new round of site selection optimization calculations to identify the nodes with the greatest potential for improving the short-circuit ratio in the next stage. This iterative calculation and optimization process will continue to be executed in a loop, constantly refining the installation location decision until the system short-circuit ratio satisfactorily meets the established requirements. Through repeated trials and step-by-step optimization strategies, we strive to ensure that the phase shifter deployment strategy can most efficiently promote system performance improvement.

[0143] The embodiment of the present application also provides a specific implementation of an electronic device capable of implementing all steps in the method for determining the phase-shifting configuration of multiple stations based on new energy in the above embodiment, see Fig.14 , electronic equipment specifically includes the following:

[0144] Processor (processor) 1201, memory (memory) 1202, communication interface (CommunicationsInterface) 1203 and bus 1204;

[0145] The processor 1201 , the memory 1202 , and the communication interface 1203 communicate with each other via the bus 1204 ; the communication interface 1203 is used to realize information transmission between relevant devices such as the server-side device, the power measurement device, and the user-side device.

[0146] The processor 1201 is used to call the computer program in the memory 1202. When the processor executes the computer program, all the steps in the method for determining the phase-shifting configuration of multiple stations based on new energy in the above embodiment are implemented. For example, when the processor executes the computer program, the following steps are implemented:

[0147] Step 100: Obtain the self-impedance of the machine end of each new energy station and the mutual impedance between the machine ends of other new energy stations;

[0148] Step 200: determining a multi-feed interaction factor of a machine end of each new energy station according to the self-impedance and the mutual impedance; wherein the multi-feed interaction factor is used to characterize the degree of influence between machine ends of multiple new energy stations;

[0149] Step 300: Determine the address and capacity of the phase regulator of each new energy station according to the multi-feed interaction factor, the short-circuit ratio of the generator end of each new energy station and the pre-generated economic evaluation parameters.

[0150] The embodiments of the present application also provide a computer-readable storage medium capable of implementing all the steps of the method for determining a phase-shifting configuration of a multi-station combined phase shifting device based on a new energy source in the above embodiment. The computer-readable storage medium stores a computer program. When the computer program is executed by a processor, all the steps of the method for determining a phase-shifting configuration of a multi-station combined phase shifting device based on a new energy source in the above embodiment are implemented. For example, when the processor executes the computer program, the following steps are implemented:

[0151] Step 100: Obtain the self-impedance of the machine end of each new energy station and the mutual impedance between the machine ends of other new energy stations;

[0152] Step 200: determining a multi-feed interaction factor of a machine end of each new energy station according to the self-impedance and the mutual impedance; wherein the multi-feed interaction factor is used to characterize the degree of influence between machine ends of multiple new energy stations;

[0153] Step 300: Determine the address and capacity of the phase regulator of each new energy station according to the multi-feed interaction factor, the short-circuit ratio of the generator end of each new energy station and the pre-generated economic evaluation parameters.

[0154] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the hardware + program embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0155] The above is a description of a specific embodiment of the specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0156] Although the present application provides method operation steps such as embodiments or flow charts, more or fewer operation steps may be included based on conventional or non-creative labor. The order of steps listed in the embodiments is only one way of executing the order of many steps and does not represent the only execution order. When the actual device or client product is executed, it can be executed in the order of the method shown in the embodiments or the drawings or in parallel (for example, in a parallel processor or multi-threaded processing environment).

[0157] 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.

[0158] 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.

[0159] 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.

[0160] The present invention uses specific embodiments to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A method for determining phase-shifting configuration of multiple stations based on new energy, characterized in that: include: Obtain the self-impedance of the machine end of each new energy station and the mutual impedance between the machine ends of other new energy stations; Determine the multi-feed interaction factor of the machine end of each new energy site according to the self-impedance and the mutual impedance; wherein the multi-feed interaction factor is used to characterize the degree of influence between the machine ends of multiple new energy sites; The address and capacity of the phase regulator of each new energy station are determined according to the multi-feed interaction factor, the short-circuit ratio of the machine end of each new energy station and the pre-generated economic evaluation parameters.

2. The method for determining phase condenser configuration according to claim 1, characterized in that: The short-circuit ratio is the ratio of the voltage to the current between the machine end of the current new energy station and the machine end of its adjacent new energy station when the phase regulator is not installed in the multiple new energy stations.

3. The method for determining phase condenser configuration according to claim 1, characterized in that: The steps of generating the economic evaluation parameters include: The economic evaluation parameters are generated according to the power loss cost, construction cost and operation and maintenance cost of the new energy station.

4. The method for determining phase condenser configuration according to claim 3, characterized in that: Also includes: The power loss cost is determined according to the capacity of a single phase regulator, the number of phase regulators, the power loss rate of the single phase regulator, the operation time, the service life and the current electricity price.

5. The method for determining phase condenser configuration according to claim 3, characterized in that: Also includes: The construction cost is determined based on the unit construction cost and capacity of a single phase regulator and the number of phase regulators.

6. A multi-station phase-shifting configuration determination device based on new energy, characterized in that: include: An impedance acquisition module is used to obtain the self-impedance of the machine end of each new energy station and the mutual impedance between the machine ends of other new energy stations; An interaction factor determination module, used to determine the multi-feed interaction factor of the machine end of each new energy site according to the self-impedance and the mutual impedance; wherein the multi-feed interaction factor is used to characterize the degree of influence between the machine ends of multiple new energy sites; The phase regulator configuration determination module is used to determine the address and capacity of the phase regulator of each new energy station according to the multi-feed interaction factor, the short-circuit ratio of the machine end of each new energy station and the pre-generated economic evaluation parameters.

7. The phase condenser configuration determination device according to claim 6, characterized in that: The short-circuit ratio is the ratio of the voltage to the current between the machine end of the current new energy station and the machine end of its adjacent new energy station when the phase regulator is not installed in the multiple new energy stations.

8. The phase condenser configuration determination device according to claim 6, characterized in that: Also includes: An economic evaluation parameter generation module, used to generate the economic evaluation parameters; The economic evaluation parameter generation module includes: The economic evaluation parameter generating unit is used to generate the economic evaluation parameters according to the power loss cost, construction cost and operation and maintenance cost of the new energy station.

9. The phase condenser configuration determination device according to claim 8, characterized in that: Also includes: The power loss cost determination module is used to determine the power loss cost according to the capacity of a single phase regulator, the number of phase regulators, the power loss rate of the single phase regulator, the operating time, the working life and the current electricity price.

10. The phase condenser configuration determination device according to claim 8, characterized in that: Also includes: The construction cost determination module is used to determine the construction cost according to the unit construction cost and capacity of a single phase regulator and the number of phase regulators.

11. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instruction is executed by a processor, the steps of the method for determining the phase-shifting configuration of a multi-station joint system based on new energy sources as described in any one of claims 1 to 5 are implemented.

12. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the steps of the method for determining the phase-shifting configuration of multiple stations based on new energy sources as described in any one of claims 1 to 5 are implemented.

13. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for determining the phase-shifting configuration of a multi-station joint system based on new energy sources as described in any one of claims 1 to 5 are implemented.

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