Power distribution grid side active control system and method

Abstract

Embodiments of the present application disclose a power distribution network side active control system and method, the method comprising: obtaining active voltage information of each substation connected by each feeder in a feeder set of an access substation, determining an adjustment term of each substation based on the active voltage information and the feeder set, obtaining a photovoltaic grid-connected point connected by each substation, and determining a to-be-adjusted photovoltaic grid-connected point in the photovoltaic grid-connected point based on the adjustment term and attribute parameters of the photovoltaic grid-connected point and performing active control. The scheme determines the adjustment term of each substation through the active voltage information of each substation connected by each feeder, determines the to-be-adjusted photovoltaic grid-connected point based on the adjustment term and the attribute parameters of the photovoltaic grid-connected point connected by each substation, and performs active control, so that the active control adjustment of the power distribution network side can be reasonably performed, and the stability and power safety of the power distribution network operation are improved.

Description

Technical Field

[0001] This application relates to the field of power management technology, and in particular to a power distribution network side active power control system and method. Background Technology

[0002] With the continuous development of power systems and equipment, modern society sees an increasing number of electricity users employing electronic devices and high-power, high-impact loads. While meeting production and daily life needs, this also brings many problems affecting the power distribution network. To ensure the electricity user experience and safety, various control measures are implemented to rationally manage power distribution. However, most of these control measures have a significant impact on the stability of the distribution network, necessitating in-depth research into the effects of these control measures on distribution network stability to mitigate their impact on the stable operation of the distribution network.

[0003] Existing power quality management technologies employ control measures that significantly impact the stable operation of the distribution network. Furthermore, the relatively high impedance of distribution network lines leads to strong coupling between active power and voltage. Improper distribution of active power can severely affect voltage fluctuations in the distribution network, resulting in reduced power supply stability, impacting the use of electrical equipment, and decreasing electrical safety. Summary of the Invention

[0004] This invention provides an active power control system and method for a distribution network, which solves the problem that improper active power distribution in the prior art can seriously affect the voltage fluctuation of the distribution network, leading to a decrease in the stability of power supply, affecting the use of electrical equipment, and reducing the safety of electricity use. It can reasonably control and regulate the active power on the distribution network side, thereby improving the stability of distribution network operation and the safety of electricity use.

[0005] In a first aspect, embodiments of the present invention provide a method for active power control on the distribution network side, comprising:

[0006] The active voltage information of each transformer substation connected to each feeder in the feeder set connected to the substation is obtained. Based on the active voltage information and the feeder set, the regulation terms of each transformer substation are determined. The photovoltaic grid connection points connected to each transformer substation are obtained. Based on the regulation terms and the attribute parameters of the photovoltaic grid connection points, the photovoltaic grid connection points to be regulated are determined and active power control is performed.

[0007] Optionally, determining the adjustment terms for each transformer area based on the active voltage information and the feeder set includes:

[0008] Based on the active voltage information, the feeder to be regulated and the corresponding transformer area regulation information are determined in the feeder set;

[0009] The feeder to be adjusted and the transformer area adjustment information are determined as the adjustment items for each transformer area.

[0010] Optionally, determining the feeder to be regulated and the corresponding transformer area regulation information in the feeder set based on the active voltage information includes:

[0011] Calculate the active voltage value of each feeder in the feeder set based on the active voltage information;

[0012] The active voltage value is compared with a preset voltage range, and the feeder that meets the comparison result is identified as the feeder to be adjusted. Based on the comparison result, the corresponding transformer area adjustment information of the feeder to be adjusted is determined.

[0013] Optionally, determining the station area adjustment information corresponding to the feeder to be adjusted based on the comparison result includes:

[0014] When the active voltage value is greater than the maximum value of the preset voltage range, the active power reduction value is calculated based on the difference between the active voltage value and the median value of the preset voltage range;

[0015] The reduction in active power is determined as the distribution area adjustment information.

[0016] Optionally, obtaining the photovoltaic grid connection points connected to each transformer substation includes:

[0017] Obtain the photovoltaic grid connection points of each transformer substation corresponding to the feeder to be adjusted.

[0018] Optionally, the step of determining the photovoltaic grid-connected points to be adjusted among the photovoltaic grid-connected points and performing active power control based on the adjustment term and the attribute parameters of the photovoltaic grid-connected points includes:

[0019] The photovoltaic grid connection point to be adjusted is determined based on the voltage usage change rate of the photovoltaic grid connection point.

[0020] The voltage of the photovoltaic grid connection point to be adjusted is adjusted according to the active power adjustment value recorded in the adjustment item.

[0021] Optionally, determining the photovoltaic grid connection point to be adjusted based on the voltage usage change rate of the photovoltaic grid connection point includes:

[0022] Calculate the voltage usage change rate of each photovoltaic grid-connected point, sort them from high to low according to the voltage usage change rate, and determine the photovoltaic grid-connected point with the highest ranking as the photovoltaic grid-connected point to be adjusted.

[0023] Secondly, embodiments of the present invention also provide a power distribution network-side active power control system, comprising:

[0024] The information acquisition module is used to acquire the active voltage information of each transformer substation connected to each feeder in the feeder set connected to the substation.

[0025] The adjustment term determination module is used to determine the adjustment term for each transformer area based on the active voltage information and the feeder set;

[0026] The information acquisition module is also used to acquire the photovoltaic grid connection points connected to each transformer area;

[0027] The active power control module is used to determine the photovoltaic grid connection point to be adjusted among the photovoltaic grid connection points based on the adjustment item and the attribute parameters of the photovoltaic grid connection point, and to perform active power control.

[0028] Thirdly, embodiments of the present invention also provide a power distribution network side active power control device, the device comprising:

[0029] One or more processors;

[0030] Storage device for storing one or more programs.

[0031] When the one or more programs are executed by the one or more processors, the one or more processors implement the active power control method on the distribution network side as described in the embodiments of the present invention.

[0032] Fourthly, embodiments of the present invention also provide a storage medium for storing computer-executable instructions, which, when executed by a computer processor, are used to execute the power distribution network-side active power control method described in embodiments of the present invention.

[0033] In this embodiment of the invention, the active voltage information of each transformer substation connected to each feeder in the feeder set connected to the substation is obtained. Based on the active voltage information and the feeder set, the regulation terms for each transformer substation are determined. The photovoltaic grid-connected points connected to each transformer substation are obtained. Based on the regulation terms and the attribute parameters of the photovoltaic grid-connected points, the photovoltaic grid-connected points to be regulated are determined and active power control is performed. This solution solves the problem in the prior art where improper active power distribution can severely affect voltage fluctuations in the distribution network, leading to reduced power supply stability, impacting the use of electrical equipment, and reducing power safety. It enables reasonable active power control and regulation on the distribution network side, improving the stability of the distribution network operation and power safety. Attached Figure Description

[0034] Figure 1 A flowchart of a power distribution network side active power control method provided in an embodiment of the present invention;

[0035] Figure 2 A flowchart illustrating a method for determining adjustment terms for each transformer substation, provided as an embodiment of the present invention;

[0036] Figure 3 A flowchart illustrating a method for adjusting the voltage of a photovoltaic grid connection point to be adjusted, provided in an embodiment of the present invention;

[0037] Figure 4 A flowchart illustrating a method for determining a photovoltaic grid connection point to be adjusted, provided in an embodiment of the present invention;

[0038] Figure 5 A block diagram of a power distribution network-side active power control system provided in an embodiment of the present invention;

[0039] Figure 6 This is a schematic diagram of the structure of a power distribution network side active power control device provided in an embodiment of the present invention. Detailed Implementation

[0040] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit the scope of the invention. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the embodiments of the present invention, and not all structures.

[0041] Figure 1 A flowchart of a power distribution network-side active power control method provided in an embodiment of the present invention is shown below. Figure 1 As shown, it specifically includes:

[0042] Step S101: Obtain the active voltage information of each transformer substation connected to each feeder in the feeder set connected to the substation.

[0043] Among them, a feeder is used to represent a branch connected to any distribution network node, with unidirectional energy flow, used for power supply; a transformer substation is used to represent the power supply range or area of ​​the transformer; active voltage information is used to represent the relevant information of active voltage for each transformer substation, which can include the active voltage values ​​of each substation. Multiple feeders are connected to the substation for power supply, and all connected feeders form a feeder set. Each feeder can connect multiple transformer substations in series. When an active voltage information acquisition command is received, the active voltage information of each transformer substation connected to each feeder in the feeder set connected to the substation is acquired. In one embodiment, the substation is connected to two feeders, namely feeder 1 and feeder 2. Feeder 1 connects transformer substation 1 and transformer substation 2, and feeder 2 connects transformer substation 3, transformer substation 4 and transformer substation 5. The active voltage values ​​of transformer substation 1 and transformer substation 2 connected by feeder 1 are obtained as 110V and 220V, respectively, and the active voltage values ​​of transformer substation 3, transformer substation 4 and transformer substation 5 connected by feeder 2 are obtained as 220V, 380V and 440V, respectively.

[0044] Step S102: Determine the adjustment terms for each transformer area based on the active voltage information and the feeder set.

[0045] The regulation terms are used to characterize various regulation information used for active power control. After obtaining the active voltage information of each transformer substation connected to each feeder in the feeder set connected to the substation, analysis is performed based on the active voltage information of each transformer substation connected to each feeder and the feeder set. The regulation terms for each transformer substation are determined based on the analysis results for active power control regulation. Optionally, based on the active voltage information of each transformer substation connected to each feeder, the feeder to be regulated and the corresponding transformer substation regulation information are determined in the feeder set, and the feeder to be regulated and the corresponding transformer substation regulation information are determined as the regulation terms for each transformer substation. In one embodiment, the feeder set contains five feeders, namely feeders 1, 2, 3, 4, and 5. The active voltage value of each feeder is calculated based on the active voltage information of each transformer substation connected to the five feeders. Based on the calculated active voltage value of each feeder and the determination conditions, feeder 2 is determined in the feeder set to be regulated, and the corresponding transformer substation regulation information is calculated based on the active voltage value of feeder 2. By determining the regulation terms for each distribution area based on active voltage information and feeder set, active power can be reasonably controlled based on the regulation terms, thereby improving the stability of distribution network operation and the safety of electricity use.

[0046] Step S103: Obtain the photovoltaic grid connection points connected to each transformer area, determine the photovoltaic grid connection points to be adjusted among the photovoltaic grid connection points based on the adjustment items and the attribute parameters of the photovoltaic grid connection points, and perform active power control.

[0047] Here, the photovoltaic grid-connected point refers to the connection point where the power source connects to the distribution network or the connection point between the power user's electrical equipment and the power grid; attribute parameters are used to characterize the photovoltaic grid-connected point's features, which may include the voltage value of the photovoltaic grid-connected point. After determining the adjustment terms for each transformer substation, the photovoltaic grid-connected point information connected to each substation is automatically obtained. Optionally, the photovoltaic grid-connected points connected to each transformer substation corresponding to the feeder to be adjusted are obtained. Based on the attribute parameters of the photovoltaic grid-connected points, the photovoltaic grid-connected point to be adjusted is determined among the photovoltaic grid-connected points connected to each transformer substation corresponding to the feeder to be adjusted, and active power control is performed on the photovoltaic grid-connected point to be adjusted according to the adjustment terms. In one embodiment, the transformer substations connected to the feeder to be adjusted are substation 1, substation 2, and substation 3, and the photovoltaic grid-connected points connected to each transformer substation corresponding to the feeder to be adjusted are photovoltaic grid-connected point 1, photovoltaic grid-connected point 2, and photovoltaic grid-connected point 3. Based on the attribute parameters of the photovoltaic grid-connected points, the photovoltaic grid-connected point to be adjusted is determined as photovoltaic grid-connected point 2 among the photovoltaic grid-connected points connected to each transformer substation corresponding to the feeder to be adjusted, and active power control is performed on photovoltaic grid-connected point 2 according to the adjustment terms. Active power control and regulation are carried out on the photovoltaic grid-connected point to be regulated based on the regulation term and the attribute parameters of the photovoltaic grid-connected point, so as to realize the rational allocation of active power.

[0048] As described above, this method involves obtaining the active voltage information of each transformer substation connected to each feeder in the feeder set connected to the substation, determining the regulation terms for each substation based on the active voltage information and the feeder set, and obtaining the photovoltaic grid-connected points connected to each substation. Based on the regulation terms and the attribute parameters of the photovoltaic grid-connected points, the method determines the photovoltaic grid-connected points to be regulated and performs active power control. This solution solves the problem in existing technologies where improper active power distribution can severely affect voltage fluctuations in the distribution network, leading to reduced power supply stability, impacting the use of electrical equipment, and reducing power safety. It enables reasonable active power control and regulation on the distribution network side, improving the stability of distribution network operation and power safety.

[0049] Figure 2 A flowchart of a method for determining adjustment terms for each transformer area is provided in an embodiment of the present invention, as shown below. Figure 2 As shown, it specifically includes:

[0050] Step S201: Obtain the active voltage information of each transformer substation connected to each feeder in the feeder set connected to the substation.

[0051] Step S202: Based on the active voltage information, determine the feeder to be adjusted and the corresponding transformer area adjustment information in the feeder set, and determine the feeder to be adjusted and the transformer area adjustment information as the adjustment items of each transformer area.

[0052] Among them, the distribution area regulation information is used to characterize the regulation parameters used for active power regulation. After obtaining the active voltage information of each distribution area connected to each feeder in the feeder set connected to the substation, the feeder to be regulated is determined in the feeder set based on the active voltage information of each distribution area connected to each feeder. Then, the corresponding distribution area regulation information is determined based on the feeder to be regulated, and the feeder to be regulated and the distribution area regulation information are determined as the regulation items of each distribution area. Optionally, the active voltage value of each feeder in the feeder set is calculated based on the active voltage information. Each calculated active voltage value is compared with a preset voltage range in turn. The feeder corresponding to the active voltage value that meets the preset conditions is determined as the feeder to be regulated. When the active voltage value is greater than the maximum value of the preset voltage range, the active power reduction value is calculated based on the difference between the active voltage value of the feeder to be regulated and the median value of the preset voltage range. The active power reduction value is determined as the distribution area regulation information. In one embodiment, the feeder set includes three feeders: feeder 1, feeder 2, and feeder 3. The active voltage information of the three transformer substations connected to feeder 1 is 110V, 180V, and 220V, respectively; the active voltage information of the three transformer substations connected to feeder 2 is 220V, 380V, and 110V, respectively; and the active voltage information of the three transformer substations connected to feeder 3 is 380V, 220V, and 440V, respectively. The calculated active voltage value is (110+180+220)510V, the active voltage value of feeder 2 is 710V, and the active voltage value of feeder 3 is 1040V. The preset voltage range is [500V, 1000V], the midpoint of the preset voltage range is 750V, and the preset condition is that the active voltage value is greater than the preset voltage range. The maximum value of the range is used to determine feeder 3 as the feeder to be adjusted by comparing each active voltage value with the preset voltage range in turn. The difference between the active voltage value of feeder 3 and the median value of the preset voltage range is 290. The difference 290 is input into the preset reduction value calculation formula to calculate the active power reduction value of 500, and the active power reduction value of 500 is determined as the area adjustment information. In another embodiment, a preset active voltage value is set, and each active voltage value of each feeder is compared with the preset active voltage value in turn. Feeders with active voltage values ​​greater than the preset active voltage value are determined as feeders to be adjusted. The active power reduction value is calculated based on the difference between the active voltage value of the feeder to be adjusted and the preset active voltage value, and the active power reduction value is determined as the area adjustment information.

[0053] Step S203: Obtain the photovoltaic grid connection points connected to each transformer area, determine the photovoltaic grid connection points to be adjusted among the photovoltaic grid connection points based on the adjustment items and the attribute parameters of the photovoltaic grid connection points, and perform active power control.

[0054] As described above, after obtaining the active voltage information of each distribution area connected to each feeder in the feeder set connected to the substation, the feeder to be regulated and the corresponding distribution area regulation information are determined based on the active voltage information in the feeder set. The feeder to be regulated and the distribution area regulation information are then determined as the regulation items for each distribution area. This scheme calculates the active voltage value of each feeder in the feeder set based on the active voltage information, compares the active voltage value with a preset voltage range, and determines the feeder that meets the comparison conditions as the feeder to be regulated. When the active voltage value is greater than the maximum value of the preset voltage range, the active power reduction value is calculated based on the difference between the active voltage value and the median value of the preset voltage range. The active power reduction value is determined as the distribution area regulation information. By using the active voltage value of the feeder as a measurement parameter, the rationality of the active power control and regulation information on the distribution network side is improved.

[0055] Figure 3 A flowchart of a method for adjusting the voltage of a photovoltaic grid connection point to be adjusted, as provided in an embodiment of the present invention, is shown below. Figure 3 As shown, it specifically includes:

[0056] Step S301: Obtain the active voltage information of each transformer substation connected to each feeder in the feeder set connected to the substation.

[0057] Step S302: Determine the adjustment items for each transformer area based on the active voltage information and the feeder set.

[0058] Step S303: Obtain the photovoltaic grid connection points connected to each transformer area corresponding to the feeder to be adjusted, determine the photovoltaic grid connection points to be adjusted according to the voltage usage change rate of the photovoltaic grid connection points, and adjust the voltage of the photovoltaic grid connection points to be adjusted according to the active power adjustment value recorded in the adjustment item.

[0059] The voltage utilization rate is used to characterize the rate of change of the voltage value at the photovoltaic grid-connected point. After determining the adjustment items for each distribution area based on the active voltage information of each feeder connected to it and the feeder set, the photovoltaic grid-connected points connected to each distribution area corresponding to the feeder to be adjusted, recorded in the adjustment items, are obtained. One distribution area corresponds to one photovoltaic grid-connected point. The voltage utilization rate of each photovoltaic grid-connected point connected to each distribution area is obtained. The photovoltaic grid-connected point to be adjusted is determined based on the voltage utilization rate of each photovoltaic grid-connected point connected to each distribution area. The voltage of the photovoltaic grid-connected point to be adjusted is adjusted according to the active power reduction value recorded in the adjustment items. Optionally, a lookup table of reduction value ranges and power consumption modes is pre-set. The power consumption mode is determined and adjusted based on the range into which the active power reduction value recorded in the adjustment items falls. In one embodiment, after determining the photovoltaic grid-connected point to be adjusted based on the voltage utilization rate of each photovoltaic grid-connected point connected to each distribution area, a pre-set lookup table of reduction value ranges and power consumption modes is shown in the table below:

[0060] [100，500] Power saving mode (500，1000] Super power saving mode (1000，+∞] Turn off the power. ...... ......

[0061] This list provides a comparison table of three different reduction ranges and electricity consumption patterns, described in detail below:

[0062] When the active power reduction value recorded in the adjustment item falls within the range of [100, 500], the power consumption mode is determined to be power saving mode; when the active power reduction value recorded in the adjustment item falls within the range of (500, 1000], the power consumption mode is determined to be super power saving mode; when the active power reduction value recorded in the adjustment item falls within the range of (1000, +∞), the power consumption mode is determined to be off power consumption.

[0063] The active power reduction value recorded in the adjustment item is 600. Referring to the aforementioned table, the power consumption mode is determined to be the super power-saving mode. This means the power consumption mode of the photovoltaic grid-connected point to be adjusted is changed to the super power-saving mode to achieve the purpose of adjusting the voltage of the photovoltaic grid-connected point. In another embodiment, the adjusted photovoltaic grid-connected point voltage is calculated based on the active power reduction value recorded in the adjustment item and then adjusted accordingly.

[0064] As described above, after determining the regulation items for each distribution area based on active power voltage information and feeder sets, the photovoltaic grid-connected points connected to each distribution area corresponding to the feeders to be regulated, as recorded in the regulation items, are obtained. The voltage usage change rate of each photovoltaic grid-connected point connected to the distribution area is then obtained. Based on the voltage usage change rate of each photovoltaic grid-connected point connected to the distribution area, the photovoltaic grid-connected point to be regulated is determined. Finally, the voltage of the photovoltaic grid-connected point to be regulated is adjusted based on the active power reduction value recorded in the regulation items. This scheme, after determining the photovoltaic grid-connected point to be regulated based on the regulation items and the attribute parameters of the photovoltaic grid-connected points, determines the power consumption mode and adjusts it by querying a lookup table based on the interval into which the active power reduction value recorded in the regulation items falls. This achieves voltage regulation of the photovoltaic grid-connected point to be regulated and reasonable allocation of active power, improving the stability of the distribution network operation and the safety of power consumption.

[0065] Figure 4 A flowchart of a method for determining the photovoltaic grid connection point to be adjusted, provided in an embodiment of the present invention, is shown below. Figure 4 As shown, it specifically includes:

[0066] Step S401: Obtain the active voltage information of each transformer substation connected to each feeder in the feeder set connected to the substation.

[0067] Step S402: Determine the adjustment items for each transformer area based on the active voltage information and the feeder set.

[0068] Step S403: Obtain the photovoltaic grid-connected points connected to each transformer area corresponding to the feeder to be adjusted, calculate the voltage usage change rate of each photovoltaic grid-connected point, sort them from high to low according to the voltage usage change rate, and determine the photovoltaic grid-connected point with the highest ranking as the photovoltaic grid-connected point to be adjusted. Adjust the voltage of the photovoltaic grid-connected point to be adjusted according to the active power adjustment value recorded in the adjustment item.

[0069] After obtaining the photovoltaic grid-connected points connected to each transformer area corresponding to the feeder to be adjusted, optionally, the voltage usage change rate of the photovoltaic grid-connected points connected to each transformer area corresponding to the feeder to be adjusted can be calculated based on the voltage values ​​of the photovoltaic grid points recorded within a preset time period. The calculated voltage usage change rates of the photovoltaic grid-connected points are sorted from high to low, and the photovoltaic grid-connected point corresponding to the highest voltage usage change rate is determined as the photovoltaic grid-connected point to be adjusted. The voltage of the photovoltaic grid-connected point to be adjusted is then adjusted according to the active power adjustment value recorded in the adjustment item. In one embodiment, the feeder to be regulated corresponds to three transformer substations: substation 1, substation 2, and substation 3. Substation 1 connects to photovoltaic grid-connected point a, substation 2 connects to photovoltaic grid-connected point b, and substation 3 connects to photovoltaic grid-connected point c. Within one hour, the recorded voltage values ​​at photovoltaic grid-connected point a are 110V, 120V, and 150V; the voltage values ​​at photovoltaic grid-connected point b are 220V, 300V, and 380V; and the voltage values ​​at photovoltaic grid-connected point c are 110V, 110V, and 120V. The voltage variation rate at photovoltaic grid-connected point a is calculated to be ((150-110) / 110)^36.3. The voltage usage change rate of photovoltaic grid-connected point b is ((380-220) / 220) 72.8%, and the voltage usage change rate of photovoltaic grid-connected point c is ((120-110) / 110) 9.1%. The calculated voltage usage change rates, ranked from high to low, are 72.8% > 36.3% > 9.1%. Therefore, photovoltaic grid-connected point b is determined as the photovoltaic grid-connected point to be adjusted. In another embodiment, the voltage usage change rate of each photovoltaic grid-connected point is calculated, and the photovoltaic grid-connected point whose voltage usage change rate exceeds the preset voltage usage change rate is determined as the photovoltaic grid-connected point to be adjusted.

[0070] As described above, after obtaining the photovoltaic grid-connected points connected to each transformer area corresponding to the feeder to be regulated, the voltage usage change rate of each photovoltaic grid-connected point connected to that feeder is calculated. These points are then sorted from highest to lowest voltage usage change rate, and the photovoltaic grid-connected point with the highest rate is selected as the photovoltaic grid-connected point to be regulated. This scheme identifies the photovoltaic grid-connected point with the largest voltage usage change rate as the photovoltaic grid-connected point to be regulated, and performs active power control on these points with large active voltage variations, improving the rationality, stability of the distribution network operation, and power safety.

[0071] Figure 5This is a block diagram of a module structure for a power distribution network-side active power control system provided in an embodiment of the present invention. This system is used to execute the power distribution network-side active power control method provided in the above embodiment, and has corresponding functional modules and beneficial effects for executing the method. For example... Figure 5 As shown, the device specifically includes:

[0072] The information acquisition module 101 is used to acquire the active voltage information of each transformer area connected to each feeder in the feeder set connected to the substation.

[0073] The adjustment term determination module 102 is used to determine the adjustment term for each transformer area based on the active voltage information and the feeder set;

[0074] The information acquisition module 101 is also used to acquire the photovoltaic grid connection points connected to each transformer area;

[0075] The active power control module 103 is used to determine the photovoltaic grid connection point to be adjusted among the photovoltaic grid connection points based on the adjustment item and the attribute parameters of the photovoltaic grid connection point, and to perform active power control.

[0076] As described above, the scheme obtains the active voltage information of each transformer substation connected to each feeder in the feeder set connected to the substation, and determines the regulation terms for each substation based on the active voltage information and the feeder set. It also obtains the photovoltaic grid-connected points connected to each substation, and determines the photovoltaic grid-connected points to be regulated based on the regulation terms and the attribute parameters of the photovoltaic grid-connected points, and performs active power control. This scheme determines the regulation terms for each substation by using the active voltage information of each feeder connected to each substation, and determines the photovoltaic grid-connected points to be regulated based on the regulation terms and the attribute parameters of the photovoltaic grid-connected points connected to each substation, and performs active power control. This solves the problem in existing technologies where improper active power distribution can seriously affect voltage fluctuations in the distribution network, leading to reduced power supply stability, affecting the use of electrical equipment, and reducing power safety. It enables reasonable active power control and regulation on the distribution network side, improving the stability of distribution network operation and power safety.

[0077] In one possible embodiment, the adjustment term determination module 102 is specifically used for:

[0078] Based on the active voltage information, the feeder to be regulated and the corresponding transformer area regulation information are determined in the feeder set;

[0079] The feeder to be adjusted and the transformer area adjustment information are determined as the adjustment items for each transformer area.

[0080] In one possible embodiment, the adjustment term determination module 102 is further configured to:

[0081] Calculate the active voltage value of each feeder in the feeder set based on the active voltage information;

[0082] The active voltage value is compared with a preset voltage range, and the feeder that meets the comparison result is identified as the feeder to be adjusted. Based on the comparison result, the corresponding transformer area adjustment information of the feeder to be adjusted is determined.

[0083] In one possible embodiment, the adjustment term determination module 102 is further configured to:

[0084] When the active voltage value is greater than the maximum value of the preset voltage range, the active power reduction value is calculated based on the difference between the active voltage value and the median value of the preset voltage range;

[0085] The reduction in active power is determined as the distribution area adjustment information.

[0086] In one possible embodiment, the information acquisition module 101 is specifically used for:

[0087] Obtain the photovoltaic grid connection points of each transformer substation corresponding to the feeder to be adjusted.

[0088] In one possible embodiment, the active power control module 103 is specifically used for:

[0089] The photovoltaic grid connection point to be adjusted is determined based on the voltage usage change rate of the photovoltaic grid connection point.

[0090] The voltage of the photovoltaic grid connection point to be adjusted is adjusted according to the active power adjustment value recorded in the adjustment item.

[0091] In one possible embodiment, the active power control module 103 is further configured to:

[0092] Calculate the voltage usage change rate of each photovoltaic grid-connected point, sort them from high to low according to the voltage usage change rate, and determine the photovoltaic grid-connected point with the highest ranking as the photovoltaic grid-connected point to be adjusted.

[0093] Figure 6 This is a schematic diagram of the structure of a power distribution network side active power control device provided in an embodiment of the present invention, as shown below. Figure 6 As shown, the device includes a processor 201, a memory 202, an input device 203, and an output device 204; the number of processors 201 in the device can be one or more. Figure 6 Taking a processor 201 as an example; the processor 201, memory 202, input device 203, and output device 204 in the device can be connected via a bus or other means. Figure 6Taking a bus connection as an example, the memory 202, as a computer-readable storage medium, can be used to store software programs, computer-executable programs, and modules, such as the program instructions / modules corresponding to the power distribution network-side active power control method in this embodiment of the invention. The processor 201 executes various functional applications and data processing of the device by running the software programs, instructions, and modules stored in the memory 202, thereby realizing the aforementioned power distribution network-side active power control method. The input device 203 can be used to receive input digital or character information and generate key signal inputs related to user settings and function control of the device. The output device 204 may include display devices such as a display screen.

[0094] This invention also provides a storage medium containing computer-executable instructions, which, when executed by a computer processor, are used to perform an active power control method on the distribution network side, the method comprising:

[0095] The active voltage information of each transformer substation connected to each feeder in the feeder set connected to the substation is obtained. Based on the active voltage information and the feeder set, the regulation terms of each transformer substation are determined. The photovoltaic grid connection points connected to each transformer substation are obtained. Based on the regulation terms and the attribute parameters of the photovoltaic grid connection points, the photovoltaic grid connection points to be regulated are determined and active power control is performed.

[0096] It is worth noting that in the above embodiments of the active power control method system for the distribution network side, the various units and modules included are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be achieved; in addition, the specific names of each functional unit are only for easy differentiation and are not used to limit the protection scope of the embodiments of the present invention.

[0097] Note that the above are merely preferred embodiments and the technical principles applied in this invention. Those skilled in the art will understand that the embodiments of this invention are not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of this invention. Therefore, although the embodiments of this invention have been described in detail above, the embodiments of this invention are not limited to the above embodiments. More other equivalent embodiments may be included without departing from the concept of the embodiments of this invention, and the scope of the embodiments of this invention is determined by the scope of the appended claims.

Claims

1. A method for active power control on the distribution network side, characterized in that, include: Obtain the active voltage information of each transformer substation connected to each feeder in the feeder set connected to the substation; Based on the active voltage information and the feeder set, the adjustment items for each transformer area are determined, including: calculating the active voltage value of each feeder in the feeder set according to the active voltage information; comparing the active voltage value with a preset voltage range; determining the feeders whose comparison results meet the conditions as feeders to be adjusted; when the active voltage value is greater than the maximum value of the preset voltage range, calculating the active power reduction value based on the difference between the active voltage value and the median value of the preset voltage range; determining the active power reduction value as transformer area adjustment information; and determining the feeders to be adjusted and the transformer area adjustment information as adjustment items for each transformer area. The process involves acquiring the photovoltaic grid-connected points connected to each transformer area, determining the photovoltaic grid-connected points to be adjusted based on the adjustment items and attribute parameters of the photovoltaic grid-connected points, and performing active power control. This includes: calculating the voltage usage change rate of each photovoltaic grid-connected point, sorting them from high to low according to the voltage usage change rate, determining the photovoltaic grid-connected point with the highest ranking as the photovoltaic grid-connected point to be adjusted, and adjusting the voltage of the photovoltaic grid-connected point to be adjusted according to the active power adjustment value recorded in the adjustment items.

2. The active power control method for the distribution network side according to claim 1, characterized in that, The acquisition of the photovoltaic grid connection points of each transformer substation includes: Obtain the photovoltaic grid connection points of each transformer substation corresponding to the feeder to be adjusted.

3. A power distribution network-side active power control system, characterized in that, include: The information acquisition module is used to acquire the active voltage information of each transformer substation connected to each feeder in the feeder set connected to the substation. The adjustment item determination module is used to determine the adjustment items for each transformer substation based on the active voltage information and the feeder set. Specifically, the adjustment item determination module is used to: calculate the active voltage value of each feeder in the feeder set according to the active voltage information; compare the active voltage value with a preset voltage range; determine the feeders that meet the comparison conditions as feeders to be adjusted; when the active voltage value is greater than the maximum value of the preset voltage range, calculate the active power reduction value based on the difference between the active voltage value and the median value of the preset voltage range; determine the active power reduction value as transformer substation adjustment information; and determine the feeders to be adjusted and the transformer substation adjustment information as adjustment items for each transformer substation. The information acquisition module is also used to acquire the photovoltaic grid connection points connected to each transformer area; The active power control module is used to determine the photovoltaic grid-connected points to be adjusted among the photovoltaic grid-connected points based on the adjustment item and the attribute parameters of the photovoltaic grid-connected points, and to perform active power control. Specifically, the active power control module is used to: calculate the voltage usage change rate of each photovoltaic grid-connected point, sort them from high to low according to the voltage usage change rate, determine the photovoltaic grid-connected point with the highest ranking as the photovoltaic grid-connected point to be adjusted, and adjust the voltage of the photovoltaic grid-connected point to be adjusted according to the active power adjustment value recorded in the adjustment item.

4. A power distribution network side active power control device, the device comprising: One or more processors; A storage device for storing one or more programs, which, when executed by one or more processors, cause the one or more processors to implement the power distribution network side active power control method as described in any one of claims 1-2.

5. A storage medium storing computer-executable instructions, which, when executed by a computer processor, are used to perform the power distribution network side active power control method as described in any one of claims 1-2.

Images