Power distribution state judgment method and device for power distribution station area and control method and device thereof

Abstract

The application discloses a distribution network state judgment method and device of a distribution network area and a control method and device thereof. The distribution network state judgment method of the distribution network area comprises the following steps: acquiring 1 / 4 cycle sequences to determine 1 / 4 cycle voltage values and 1 / 4 cycle current values of each 1 / 4 cycle, and calculating a fundamental wave current change rate, a fundamental wave voltage change rate and a fundamental wave phase angle change rate of continuous 1 / 4 cycles; judging whether the distribution network state of the distribution network area is transiently generated or not according to the fundamental wave current change rate, the fundamental wave voltage change rate and the fundamental wave phase angle change rate; if the distribution network state is not transiently generated, calculating corresponding 1 cycle voltage values and 1 cycle current values based on each cycle sequence of a distribution network area monitoring terminal; calculating voltage change amplitudes and current change amplitudes, and judging whether the distribution network state of the distribution network area is in a steady state or a dynamic state according to the voltage change amplitudes and the current change amplitudes. The application improves the power grid management and analysis efficiency and capability, and effectively guarantees the safe operation of the power grid.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power distribution network operation and analysis, in particular to a power distribution network state judgment method and device for a power distribution network area and a control method and device thereof. BACKGROUND

[0002] The power distribution network area is the last station for delivering power goods to users in physical connection between power production and power consumption. Under the current situation that most power supply and transmission line skeletons are gradually improved, the investment direction of domestic power grid construction has shifted from the backbone network to the distribution network. From the current situation, the traditional mode of area management cannot meet the needs of real work, and with the promotion of the industry, changes in policy, and technological progress, the operation of the power distribution network area will have a new development direction.

[0003] China is building low-voltage distribution network areas connected to distributed new energy. Due to the randomness and intermittency of distributed power, the state of the power grid changes frequently. More seriously, after the distributed power is connected to the low-voltage distribution network area, the original power flow mode is changed, so that the power distribution network area and the distributed energy directly flow in both directions, further increasing the frequency of changes in the power grid form. SUMMARY

[0004] The present application provides a power distribution network state judgment method and device for a power distribution network area and a control method and device thereof to solve the problem of the complexity of not being able to cope with the evolution of the distribution network form, and to flexibly adjust the power supply, thereby causing energy waste and unsafe operation of the power grid.

[0005] According to one aspect of the present application, a power distribution network state judgment method and control method for a power distribution network area are provided, which include:

[0006] Obtaining 1 / 4 cycle sequences to determine the 1 / 4 cycle voltage value and the 1 / 4 cycle current value of each 1 / 4 cycle, and calculating the fundamental current variation rate, the fundamental voltage variation rate, and the fundamental phase angle variation rate of the continuous 1 / 4 cycle according to the 1 / 4 cycle voltage value and the 1 / 4 cycle current value;

[0007] According to the fundamental current variation rate, the fundamental voltage variation rate, and the fundamental phase angle variation rate, it is determined whether the power distribution network state of the power distribution network area is transiently occurring. If the power distribution network state is not transiently occurring, the corresponding 1 cycle voltage value and 1 cycle current value are calculated based on the 1 cycle sequence of the power distribution network area monitoring terminal;

[0008] The voltage variation amplitude and the current variation amplitude are calculated according to the 1 cycle voltage value and the 1 cycle current value, and it is determined whether the power distribution network state of the power distribution network area is in a steady state or a dynamic state according to the voltage variation amplitude and the current variation amplitude.

[0009] Optionally, the determining whether the power distribution state of the power distribution area is transiently occurring according to the fundamental wave current rate of change, the fundamental wave voltage rate of change and the fundamental wave phase angle rate of change comprises:

[0010] In one cycle, if the sign of the fundamental wave current rate of change and the fundamental wave voltage rate of change is negative, it is determined that the power distribution state of the power distribution area is transiently occurring;

[0011] If the sign of the fundamental wave current rate of change and the fundamental wave voltage rate of change is positive, it is determined whether the fundamental wave current rate of change, the fundamental wave voltage rate of change and the fundamental wave phase angle rate of change all exceed a first set threshold, if yes, it is determined that the power distribution state of the power distribution area is transiently occurring, if no, the harmonic voltage value and the harmonic current value are obtained, and it is determined whether the power distribution state of the power distribution area is transiently occurring according to the harmonic voltage value and the harmonic current value.

[0012] Optionally, the determining whether the power distribution state of the power distribution area is transiently occurring according to the harmonic voltage value and the harmonic current value comprises:

[0013] If the harmonic voltage value and the harmonic current value are both greater than a second set threshold, it is determined that the power distribution state of the power distribution area is transiently occurring;

[0014] If any of the harmonic voltage value and the harmonic current value is not greater than the second set threshold, it is determined whether the power distribution state of the power distribution area is in a steady state or a dynamic state.

[0015] Optionally, the determining whether the power distribution state of the power distribution area is in a steady state or a dynamic state according to the voltage change amplitude and the current change amplitude comprises:

[0016] If any of the voltage change amplitude and the current change amplitude is greater than a third set threshold, it is determined that the power distribution state of the power distribution area is in a dynamic state;

[0017] If the power distribution state of the power distribution area does not satisfy the condition of determining whether it is transiently occurring and the condition of determining whether it is in a dynamic state, it is determined that the power distribution state of the power distribution area is in a steady state.

[0018] According to another aspect of the present application, a control method of a power distribution area is provided, the power distribution area comprises a plurality of power distribution area monitoring terminals, the power distribution area monitoring terminals can execute the power distribution state determination method of any one of the embodiments of the present application, and the control method of the power distribution area comprises:

[0019] Obtaining power distribution state determination information of each power distribution area monitoring terminal, and transmitting the power distribution state determination information to other power distribution area monitoring terminals of the power distribution area;

[0020] determining the number of other power distribution area monitoring terminals that receive the power distribution state judgment information, and if the number exceeds two, generating valid event information to be transmitted to the power distribution area remote server.

[0021] Optionally, the control method of the power distribution area further comprises:

[0022] According to the power distribution area remote server receiving each valid event information corresponding to the power distribution area, generating corresponding power distribution area control information between each power distribution area.

[0023] According to another aspect of the present application, a power distribution area state judgment device of a power distribution area is provided, which comprises:

[0024] The fundamental wave change rate determination module is configured to obtain 1 / 4 cycle sequence to determine the 1 / 4 cycle voltage value and the 1 / 4 cycle current value of each 1 / 4 cycle, and calculate the fundamental wave current change rate, the fundamental wave voltage change rate and the fundamental wave phase angle change rate according to the 1 / 4 cycle voltage value and the 1 / 4 cycle current value.

[0025] The cycle value determination module is configured to determine whether the power distribution state of the power distribution area is transiently changed according to the fundamental wave current change rate, the fundamental wave voltage change rate and the fundamental wave phase angle change rate, and if the power distribution state is not transiently changed, calculate the 1 cycle voltage value and the 1 cycle current value based on the 1 cycle sequence of the power distribution area monitoring terminal.

[0026] The power distribution state judgment module is configured to calculate the voltage change amplitude and the current change amplitude according to the 1 cycle voltage value and the 1 cycle current value, and determine whether the power distribution state of the power distribution area is in a steady state or a dynamic state according to the voltage change amplitude and the current change amplitude.

[0027] According to another aspect of the present application, a power distribution area control device of a power distribution area is provided, which comprises a plurality of power distribution area monitoring terminals capable of performing the power distribution area state judgment method of any one of the embodiments of the present application, and the power distribution area control device comprises:

[0028] The information transmission module is configured to obtain the power distribution state judgment information of each power distribution area monitoring terminal, and transmit the power distribution state judgment information to other power distribution area monitoring terminals of the power distribution area.

[0029] The information generation module is configured to determine the number of other power distribution area monitoring terminals that receive the power distribution state judgment information, and if the number exceeds two, generate valid event information to be transmitted to the power distribution area remote server.

[0030] According to another aspect of the present application, there is provided an electronic device, comprising:

[0031] at least one processor; and

[0032] a memory connected with the at least one processor; wherein

[0033] the memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to perform the power distribution state determination method of the power distribution area according to any one of the embodiments of the present application, and the control method of the power distribution area according to any one of the embodiments of the present application.

[0034] According to another aspect of the present application, there is provided a computer readable storage medium storing computer instructions for enabling a processor to implement the power distribution state determination method of the power distribution area according to any one of the embodiments of the present application, and the control method of the power distribution area according to any one of the embodiments of the present application when executed by the processor.

[0035] The technical scheme of the embodiment of the present application determines the 1 / 4 cycle voltage value and the 1 / 4 cycle current value of each 1 / 4 cycle by acquiring the 1 / 4 cycle sequence, and calculates the fundamental wave current change rate, the fundamental wave voltage change rate and the fundamental wave phase angle change rate of the continuous 1 / 4 cycle according to the 1 / 4 cycle voltage value and the 1 / 4 cycle current value; determines whether the power distribution state of the power distribution area is transiently occurred according to the fundamental wave current change rate, the fundamental wave voltage change rate and the fundamental wave phase angle change rate; if the power distribution state is not transiently occurred, calculates the corresponding 1 cycle voltage value and 1 cycle current value based on the 1 cycle sequence of the power distribution area monitoring terminal; calculates the voltage change amplitude and the current change amplitude according to the 1 cycle voltage value and the 1 cycle current value, and determines whether the power distribution state of the power distribution area is in steady state or dynamic state according to the voltage change amplitude and the current change amplitude. The present application solves the complexity of not being able to cope with the evolution of the power distribution network form, flexibly adjusts the power supply, and further causes energy waste and unsafe operation of the power grid. The present application can quickly locate the range involved in the power grid state change and the object causing the power grid state change, improves the efficiency and ability of power grid management and analysis, and effectively ensures the safe operation of the power grid.

[0036] It should be understood that the content described in this part is not intended to identify key or important features of the embodiments of the present application, nor to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to make the technical solutions in the embodiments of the present application clearer, the accompanying drawings needed in the embodiments will be briefly introduced. Obviously, the accompanying drawings in the following description only need to be some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0038] Figure 1 is a flow chart of a distribution network state judgment method of a distribution network area according to an embodiment of the present application;

[0039] Figure 2 is a conversion schematic diagram of a distribution network state of a distribution network area suitable for the embodiments of the present application being in a steady state and a dynamic state;

[0040] Figure 3 is a sensing time and range difference schematic diagram of a distribution network area monitoring terminal suitable for the embodiments of the present application;

[0041] Figure 4 is a flow chart of a control method of a distribution network area according to an embodiment of the present application;

[0042] Figure 5 is a distribution schematic diagram of a distribution network area monitoring terminal suitable for the embodiments of the present application;

[0043] Figure 6 is a structural schematic diagram of a distribution network state judgment device of a distribution network area according to an embodiment of the present application;

[0044] Figure 7 is a structural schematic diagram of a control device of a distribution network area according to an embodiment of the present application;

[0045] Figure 8 is a structural schematic diagram of an electronic device for implementing a distribution network state judgment method of a distribution network area and a control method of a distribution network area. DETAILED DESCRIPTION

[0046] In order to make the technical solutions in the embodiments of the present application clearer, the accompanying drawings needed in the embodiments will be briefly introduced. Obviously, the accompanying drawings in the following description only need to be some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0047] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0048] Embodiment one

[0049] Figure 1 A flowchart of a power distribution state judgment method for a power distribution area is provided for the first embodiment of the present application. The present embodiment can be applied to the case of power distribution area edge side multi-state evaluation analysis based on a power distribution area monitoring terminal. The power distribution state judgment method for the power distribution area can be executed by a power distribution state judgment device for the power distribution area. The power distribution state judgment device for the power distribution area can be realized in the form of hardware and / or software, and can be configured in an electronic device. As shown in the figure, the power distribution state judgment method for the power distribution area includes: Figure 1

[0050] S110, acquiring 1 / 4 cycle sequence to determine 1 / 4 cycle voltage value and 1 / 4 cycle current value of each 1 / 4 cycle, and calculating fundamental current change rate, fundamental voltage change rate and fundamental phase angle change rate of continuous 1 / 4 cycle according to the 1 / 4 cycle voltage value and the 1 / 4 cycle current value.

[0051] Specifically, assuming that the sampling point number of the power distribution area monitoring terminal per cycle (20ms) is N, the calculation formula for determining the 1 / 4 cycle voltage value and the 1 / 4 cycle current value of each 1 / 4 cycle is as follows:

[0052]

[0053] Wherein, U(k) represents the 1 / 4 cycle voltage value, wherein k is an integer, k=1 represents the fundamental wave, and k is greater than 1, which is a harmonic; qua is a 1 / 4 cycle sequence, i.e. there are 4 1 / 4 cycles in a cycle, and the corresponding qua values are 1, 2, 3 and 4; per represents the sampling point number of 1 / 4 cycle, i.e.

[0054]

[0055] ​n is a sampling sequence, u(n) represents an input voltage signal; I(k) represents a 1 / 4 cycle current value; i(n) represents a 1 / 4 cycle input current signal.

[0056] Further, the fundamental current change rate, the fundamental voltage change rate and the fundamental phase angle change rate of the continuous 1 / 4 cycle are obtained by the following formula (4), (5), (6), and the fundamental time, k = 1, is specifically:

[0057]

[0058]

[0059] Wherein, λ k u (qua) represents the fundamental voltage change rate; λ k i (qua) represents the fundamental current change rate; λ 1 θ (qua) represents the fundamental phase angle change rate.

[0060] S120, according to the fundamental current change rate, the fundamental voltage change rate and the fundamental phase angle change rate, it is judged whether the distribution network state of the distribution network area is transiently occurred, if the distribution network state is not transiently occurred, the corresponding 1 cycle voltage value and 1 cycle current value are calculated based on the per cycle sequence of the distribution network area monitoring terminal.

[0061] Specifically, when the distribution network state of the distribution network area changes, the fundamental current change rate, the fundamental voltage change rate and the fundamental phase angle change rate of the continuous 1 / 4 cycle can change quickly accordingly, and in 1 cycle, when the fundamental voltage change rate λ 1 u (2), the fundamental current change rate λ 1 i (2), the formula (7) is calculated when taking negative sign (sign of formula 7 represents taking sign), it is immediately judged that the distribution network state of the distribution network area is transiently occurred, because when the distribution network area fails, the voltage is low, and the current is increased.

[0062] dirt = sign (λ 1 u (qua) * λ 1 i (qua)) (7)

[0063] It can be understood that, if the sign of the fundamental wave current rate of change and the fundamental wave voltage rate of change is positive, it is judged whether the fundamental wave current rate of change, the fundamental wave voltage rate of change and the fundamental wave phase angle rate of change all exceed the first set threshold value, if yes, it is judged that the distribution network state of the distribution network area is transient, if no, the harmonic voltage value and the harmonic current value are obtained, and it is judged whether the distribution network state of the distribution network area is transient according to the harmonic voltage value and the harmonic current value.

[0064] Further, on the basis of the above, if the harmonic voltage value and the harmonic current value are both greater than the second set threshold value, it is judged that the distribution network state of the distribution network area is transient; if any of the harmonic voltage value and the harmonic current value is not greater than the second set threshold value, it is judged whether the distribution network state of the distribution network area is in steady state or dynamic.

[0065] For example, when the fundamental wave voltage rate of change λ 1 u (2), the fundamental wave current rate of change λ 1 i (2), the fundamental wave phase angle rate of change λ 1 θ When any index of (2) exceeds the first set threshold value, it is judged that the distribution network state of the distribution network area is transient.

[0066] Specifically, when the first set threshold value γ 1 u of the fundamental wave voltage rate of change is exceeded, it is judged that the distribution network state of the distribution network area is transient. 1 i of the fundamental wave current rate of change is exceeded, it is judged that the distribution network state of the distribution network area is transient. 1 θ of the fundamental wave phase angle rate of change is exceeded, it is judged that the distribution network state of the distribution network area is transient. 1 u , γ 1 i , γ 1 θ The first set threshold value γ 1 u of the fundamental wave voltage rate of change corresponding to the preliminary judgment that the distribution network state of the distribution network area is transient can be referred to the protection limit value setting, and the specific reference formula (8), (9), (10) is as follows:

[0067] λ 1 u (qua)>γ 1 i (8)

[0068] λ 1 i (9)

[0069] λ 1θ (qua) > γ 1 θ (10)

[0070] It should be noted that, since it is compared within the same cycle, (8), (9), (10) formula qua only takes 2, 3, 4.

[0071] Further, in order to improve the robustness of the judgment, when the fundamental voltage change rate λ 1 u (3), the fundamental phase angle change rate λ 1 i (3), the fundamental phase angle change rate λ 1 θ (3) are all greater than the first set threshold, the state of the distribution network in the distribution area is determined to be transient;

[0072] If the above conditions for determining whether a transient occurs are not met, the harmonic is considered to be added to the judgment, that is, the harmonic voltage value and the harmonic current value are obtained to determine. First, based on the calculation of the k (k greater than 1) harmonic voltage and current change rate in formula (2), (3), then through (8), (9) to determine whether the k (k greater than 1) harmonic voltage and current is greater than the threshold. Specifically, the harmonic can be selected as 2, 3, 5, 7 to determine, that is, when k = 2 or k = 3 or k = 5 or k = 7, it is satisfied, and the harmonic voltage value and the harmonic current value are determined to determine whether the second set threshold is met. Condition for determining whether it is in a dynamic state, that is, formula (11) or formula (12) is met.

[0073] λ k u (qua) > γk u (11)

[0074] λ k i (qua) > γ k i (12)S130, the voltage change amplitude and the current change amplitude are calculated according to the 1 cycle voltage value and the 1 cycle current value, and the voltage change amplitude and the current change amplitude are calculated. According to the voltage change amplitude and the current change amplitude, the state of the distribution network in the distribution area is determined to be in a steady state or a dynamic state.

[0075] For example Figure 2As shown, the power grid is in a dynamic state for a long time fluctuation, further changes to another steady state. Considering the steady state or dynamic state for a long time, therefore, based on the 1 cycle voltage value and the 1 cycle current value, the voltage variation amplitude and the current variation amplitude are calculated. The power grid area monitoring terminal is provided with N sampling points per cycle (20ms). The 1 cycle voltage value and the 1 cycle current value are calculated by formula (13) and formula (14). The parameters involved in the formula are the same as those in formula (1) and formula (2), and specifically:

[0076]

[0077] At this time, the state of the power grid can be determined once every 2 cycles, that is, the voltage variation amplitude Δ u (l) and the current variation amplitude Δ u (l) are calculated by formula (15) and formula (16).

[0078] In the formula, l is the cycle sequence, which is an integer; U(l) is obtained by taking the square root of the voltage at the lth and (l-1)th cycle after calculating the 1 cycle voltage value based on formula (15); I(l) and I(l-2) are also calculated in the same way; U ref is the rated voltage of the monitoring object; similarly, I(l).

[0079] Δ u (l) = U(l) - U ref (15)

[0080] Δ i (l) = I(l) - I(l-2) (16)

[0081] Further, on the basis of the above, if either the voltage variation amplitude and the current variation amplitude is greater than a third set threshold, it is determined that the power grid state of the power grid area is in a dynamic state; if the power grid state of the power grid area does not satisfy the condition of determining whether a transient state occurs and the condition of determining whether it is in a dynamic state, it is determined that the power grid state of the power grid area is in a steady state.

[0082] Specifically, when the voltage variation amplitude Δ u (l) and the current variation amplitude Δ u (l) exceed the third set threshold ξ u , ξ i (the third set threshold ξ u , ξ i can be set according to the rated voltage and rated current of the power transformer capacity), further, combined with the subsequent l+2 cycles, when the voltage variation amplitude Δ u (l+2) and the current variation amplitude Δ u(l+2) is greater than a third set threshold value ξ u , ξ i When the distribution network state of the distribution network area is in a dynamic state.

[0083] The technical scheme of the embodiment of the application determines the 1 / 4 cycle voltage value and the 1 / 4 cycle current value of each 1 / 4 cycle through the acquisition of the 1 / 4 cycle sequence, and calculates the fundamental wave current change rate, the fundamental wave voltage change rate and the fundamental wave phase angle change rate of the continuous 1 / 4 cycle according to the 1 / 4 cycle voltage value and the 1 / 4 cycle current value; determines whether the distribution network state of the distribution network area is transiently generated according to the fundamental wave current change rate, the fundamental wave voltage change rate and the fundamental wave phase angle change rate, and if the distribution network state is not transiently generated, calculates the corresponding 1 cycle voltage value and 1 cycle current value based on the 1 cycle sequence of the distribution network area monitoring terminal; calculates the voltage change amplitude and the current change amplitude according to the 1 cycle voltage value and the 1 cycle current value, and determines whether the distribution network state of the distribution network area is in a steady state or a dynamic state according to the voltage change amplitude and the current change amplitude. The application solves the complexity of not being able to cope with the evolution of the distribution network form, flexibly adjusts the power supply, and thus causes energy waste and unsafe operation of the power grid, can quickly locate the range involved in the change of the power grid state and the object causing the change of the power grid state, improves the efficiency and ability of power grid management and analysis, and effectively ensures the safe operation of the power grid.

[0084] Embodiment two

[0085] When the distribution network state of the distribution network area is in a transient state or a dynamic state, it is inevitable that an abnormality occurs in a certain component or assembly and is propagated to other objects in the distribution network area. The state time perceived by different positions is different due to the propagation through the power grid line, and the specific difference is shown in Figure 3 Since there are hundreds or thousands of users in a distribution network area, if the perceived information is all transmitted to the administrator side of the remote server of the distribution network area, not only the transmission cost is increased, but also the decision and analysis of the administrator are easily disturbed, and the calculation and collaborative analysis ability of the situation awareness of the distribution network area cannot be exerted.

[0086] Figure 4 A flowchart of a control method of a distribution network area is provided for the second embodiment of the application, and the distribution network area includes a plurality of distribution network area monitoring terminals. The distribution network area monitoring terminals can execute the distribution network state judgment method of any one of the embodiments of the application. As shown in Figure 4 The control method of the distribution network area includes the following steps:

[0087] S210, acquire the distribution network state judgment information of each distribution network area monitoring terminal, and transmit the distribution network state judgment information to other distribution network area monitoring terminals of the distribution network area.

[0088] For example, refer to Figure 5 The situational awareness terminal is the distribution network station monitoring terminal in the embodiment, and the distribution network station monitoring terminal in the embodiment can be used to perceive other distribution network station monitoring terminals in the same distribution network station. When a distribution network station monitoring terminal A in the distribution network station determines that the distribution network station is in a transient state or a dynamic state through the distribution network multi-element (transient, steady, dynamic) state determination method, the distribution network state determination information is transmitted to other distribution network station monitoring terminals (supposed to be B, C, D, and E) in the distribution network station. The distribution network station monitoring terminal A, the distribution network station monitoring terminal B, C, and the distribution network station monitoring terminal D, E are the situational awareness terminals 1, 2, 3, and 4 in Figure 5

[0089] Further, after the distribution network station monitoring terminal A in the distribution network station receives the distribution network state determination information, the distribution network station monitoring terminal B, C in the distribution network station determines whether the same distribution network state determination information is perceived through the received distribution network state determination information time. If the same distribution network state determination information is perceived, the time sequence of the perceived events is further compared. If the time at which the distribution network state determination information is perceived by the distribution network station monitoring terminal A is earlier than the time at which the distribution network state determination information is perceived by the distribution network station monitoring terminal B, the distribution network state determination information perceived by the distribution network station monitoring terminal A is transmitted back to the distribution network station monitoring terminal A by the distribution network station monitoring terminal B. Otherwise, the distribution network state determination information of the distribution network station monitoring terminal B is returned. The distribution network station monitoring terminal D, E does not perceive the distribution network state determination information transmitted by the distribution network station monitoring terminal A, and thus does not return any information to the distribution network station monitoring terminal A.

[0090] It should be noted that, in order to prevent the same distribution network state determination information from being repeatedly transmitted, once the distribution network state determination information of other distribution network station monitoring terminals is received, the distribution network state determination information transmission to the whole distribution network station is not allowed during the judgment and decision-making period.

[0091] Through the above process, the distribution network station monitoring terminal A can determine the influence range and occurrence time through the received distribution network state determination information, that is, the effect shown in Figure 3 is achieved. Subsequently, the distribution network station monitoring terminal A integrates and transmits the distribution network state determination information to the administrator side of the distribution network station remote server.

[0092] In S220, the number of perceptions of other distribution network station monitoring terminals receiving the distribution network state determination information is determined. If the number of perceptions exceeds two, valid event information is generated, and the valid event information is transmitted to the distribution network station remote server.

[0093] ​On the basis, the perception data quantity of other power distribution area monitoring terminal which integrates the perception to the power distribution state judgment information is integrated, if the same power distribution area, if the perception quantity is more than two, the valid event information is generated, if the perception quantity does not exceed two, it is identified as invalid event information.

[0094] After generating the valid event information, the valid event information is transmitted to the power distribution area remote server.

[0095] In the above embodiment, the power distribution area monitoring terminal between different power distribution areas can be analyzed cooperatively, that is, according to the power distribution area corresponding to each valid event information received by the power distribution area remote server, the corresponding power distribution area control information between each power distribution area is generated.

[0096] The technical scheme of the embodiment of the application, by acquiring the power distribution state judgment information of each power distribution area monitoring terminal, and transmitting the power distribution state judgment information to other power distribution area monitoring terminals of the power distribution area, determining the perception quantity of other power distribution area monitoring terminals receiving the power distribution state judgment information, if the perception quantity exceeds two, generating valid event information, and transmitting the valid event information to the power distribution area remote server. The application is based on the situation that the component or object triggering the change of power grid state will transmit the state change to other parts of the power grid through electrical lines, etc. Based on the perception time difference caused by transmission, a cooperative control method of regional monitoring terminal is designed. Through this method, the range involved in the change of power grid state can be quickly located, and the object causing the change of power grid state is located, which improves the efficiency and ability of power grid management and analysis, and effectively ensures the safe operation of the power grid.

[0097] Embodiment three

[0098] Figure 6 A structure diagram of a power distribution state judgment device of a power distribution area provided for the third embodiment of the application. As shown in the figure, Figure 6 The power distribution state judgment device of the power distribution area comprises:

[0099] The fundamental wave change rate determination module 610 is used to acquire 1 / 4 cycle sequence to determine the 1 / 4 cycle voltage value and the 1 / 4 cycle current value of each 1 / 4 cycle, and calculate the fundamental wave current change rate, the fundamental wave voltage change rate and the fundamental wave phase angle change rate according to the 1 / 4 cycle voltage value and the 1 / 4 cycle current value;

[0100] The cycle value determination module 620 is used to determine whether the power distribution state of the power distribution area is transient if the fundamental wave current change rate, the fundamental wave voltage change rate and the fundamental wave phase angle change rate, if the power distribution state is not transient, the corresponding 1 cycle voltage value and 1 cycle current value are calculated based on the 1 cycle sequence of the power distribution area monitoring terminal.

[0101] The network state determination module 630 is configured to calculate a voltage variation amplitude and a current variation amplitude according to the 1st harmonic voltage value and the 1st harmonic current value, and determine whether the network state of the network area is in a steady state or a dynamic state according to the voltage variation amplitude and the current variation amplitude.

[0102] Optionally, the determining whether the network state of the network area is in a transient state includes:

[0103] In the 1st harmonic, if the signs of the 1st harmonic current variation rate and the 1st harmonic voltage variation rate are negative, it is determined that the network state of the network area is in a transient state;

[0104] If the signs of the 1st harmonic current variation rate and the 1st harmonic voltage variation rate are positive, it is determined whether the 1st harmonic current variation rate, the 1st harmonic voltage variation rate and the 1st harmonic phase angle variation rate all exceed a first set threshold value, if yes, it is determined that the network state of the network area is in a transient state, if no, a harmonic voltage value and a harmonic current value are obtained, and it is determined whether the network state of the network area is in a transient state according to the harmonic voltage value and the harmonic current value.

[0105] Optionally, the determining whether the network state of the network area is in a transient state according to the harmonic voltage value and the harmonic current value includes:

[0106] If the harmonic voltage value and the harmonic current value are both greater than a second set threshold value, it is determined that the network state of the network area is in a transient state;

[0107] If either of the harmonic voltage value and the harmonic current value is not greater than the second set threshold value, it is determined whether the network state of the network area is in a steady state or a dynamic state.

[0108] Optionally, the determining whether the network state of the network area is in a steady state or a dynamic state according to the voltage variation amplitude and the current variation amplitude includes:

[0109] If either of the voltage variation amplitude and the current variation amplitude is greater than a third set threshold value, it is determined that the network state of the network area is in a dynamic state;

[0110] If the network state of the network area does not satisfy the conditions of determining whether it is in a transient state and determining whether it is in a dynamic state, it is determined that the network state of the network area is in a steady state.

[0111] The network state determination device for the network area provided by the embodiment of the application can execute the network state determination method for the network area provided by any embodiment of the application, and has the corresponding function modules and beneficial effects of executing the network state determination method for the network area.

[0112] Embodiment Four

[0113] Figure 7 A structural schematic diagram of a control device of a distribution network area provided by Embodiment Four of the present application is shown. The distribution network area includes a plurality of distribution network area monitoring terminals, which can execute the distribution network state judgment method of any of the embodiments of the present application, such as Figure 7 As shown in the figure, the control device of the distribution network area includes:

[0114] An information transmission module 710 is configured to acquire the distribution network state judgment information of each distribution network area monitoring terminal, and transmit the distribution network state judgment information to other distribution network area monitoring terminals of the distribution network area.

[0115] An information generation module 720 is configured to determine the number of awareness of other distribution network area monitoring terminals receiving the distribution network state judgment information, and if the number of awareness exceeds two, generate valid event information, and transmit the valid event information to the remote server of the distribution network area.

[0116] Optionally, the control device of the distribution network area includes:

[0117] A distribution network area control information generation module is configured to generate the corresponding distribution network area control information between each distribution network area according to the distribution network area corresponding to each valid event information received by the remote server of the distribution network area.

[0118] The control device of the distribution network area provided by the embodiments of the present application can execute the control method of the distribution network area provided by any of the embodiments of the present application, and has the corresponding function modules and beneficial effects of executing the control method of the distribution network area.

[0119] Embodiment Five

[0120] Figure 8 A structural schematic diagram of an electronic device 810 that can be used to implement embodiments of the present application is shown. The electronic device is intended to represent various forms of digital computers, such as laptops, desktops, tablets, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The electronic device can also represent various forms of mobile devices, such as personal digital assistants, cellular telephones, smart phones, wearable devices (e.g., headgear, eyewear, watches, etc.), and other similar computing devices. The components shown here, their connections and relationships, and their functions, are meant to be examples only, and are not intended to limit the implementations of the present application described and / or claimed in this document.

[0121] As Figure 8As shown, the electronic device 810 includes at least one processor 811, and a memory, such as a read-only memory (ROM) 812, a random access memory (RAM) 813, and the like, connected to the at least one processor 811 in communication. The memory stores a computer program executable by the at least one processor 811, and the processor 811 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 812 or loaded from the storage unit 818 into the random access memory (RAM) 813. In the RAM 813, various programs and data required for the operation of the electronic device 810 can also be stored. The processor 811, the ROM 812, and the RAM 813 are connected to each other through a bus 814. An input / output (I / O) interface 815 is also connected to the bus 814.

[0122] Various components in the electronic device 810 are connected to the I / O interface 815, including an input unit 816, such as a keyboard, a mouse, and the like, an output unit 817, such as various types of displays, a speaker, and the like, a storage unit 818, such as a magnetic disk, an optical disk, and the like, and a communication unit 819, such as a network card, a modem, a wireless communication transceiver, and the like. The communication unit 819 allows the electronic device 810 to exchange information / data with other devices through a computer network, such as the Internet, and / or various telecommunication networks.

[0123] The processor 811 can be various general-purpose and / or special-purpose processing components having processing and computing capabilities. Some examples of the processor 811 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, and the like. The processor 811 performs various methods and processes described above, such as the power distribution state determination method for a power distribution area and the control method for a power distribution area.

[0124] In some embodiments, the power distribution state determination method for a power distribution area and the control method for a power distribution area can be implemented as a computer program tangibly embodied in a computer readable storage medium, such as the storage unit 818. In some embodiments, part or all of the computer program can be loaded and / or installed on the electronic device 810 via the ROM 812 and / or the communication unit 819. When the computer program is loaded into the RAM 813 and executed by the processor 811, one or more steps of the power distribution state determination method for a power distribution area and the control method for a power distribution area described above can be performed. Alternatively, in other embodiments, the processor 811 can be configured to perform the power distribution state determination method for a power distribution area and the control method for a power distribution area by any other appropriate means, such as by means of firmware.

[0125] Various implementations of the systems and techniques described above can be realized in digital electronic circuitry, integrated circuitry, specially designed application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include implementation in one or more computer programs that are executable and / or interpretable on a programmable system including at least one programmable processor, which can be special or general purpose, coupled to receive data and instructions from, and to transmit data and instructions to, a storage system, at least one input device, and at least one output device.

[0126] Computer programs implementing methods of the present application can be written in any combination of one or more programming languages. These computer programs can be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the computer program, when executed, implements the functions / acts specified in the flowcharts and / or block diagrams. The computer program can be executed entirely on a machine, partially on a machine, partially on a machine as a stand-alone software package, and partially on a machine and partially on a remote machine or entirely on a remote machine or server.

[0127] In the context of the present application, a computer-readable storage medium can be a tangible medium that can contain or store computer programs for use by or in connection with an instruction execution system, apparatus, or device. The computer-readable storage medium can include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer-readable storage medium can be a machine-readable signal medium. More specific examples of the machine-readable storage medium will include one or more lines of electrical connections, portable computer disks, hard disk drives, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or Flash memory), optical fibers, portable compact disc read-only memories (CD-ROMs), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0128] To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user and a keyboard and a pointing device (e.g., a mouse or a trackball) by which the user can provide input to the electronic device. Other kinds of devices can be used to provide for interaction with a user as well; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form, including acoustic, speech, or tactile input.

[0129] The systems and techniques described here can be implemented in a computing system that includes a back end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front end component (e.g., a user computer having a graphical user interface or a Web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back end, middleware, or front end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0130] The computing system can include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. A server can be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system, to solve the defects of large management difficulty and weak business scalability in traditional physical host and VPS service.

[0131] It should be understood that the various forms of flow shown above can be re-ordered, added to, or deleted from without departing from the scope of the present disclosure. For example, the steps recited in the present disclosure can be executed in parallel, executed in sequence, or executed in a different order, as long as the desired results of the present disclosure are achieved, and the present disclosure is not limited herein.

[0132] The specific embodiments described above are not intended to be limiting, and persons skilled in the art will appreciate that various modifications, combinations, sub-combinations and alternatives can be made to the specific embodiments without departing from the spirit and principles of the disclosure. Accordingly, the disclosure is not limited to the specific embodiments described above, but only by the scope of the appended claims.

Claims

1. A distribution network state judgment method for a distribution network station area, characterized in that, The method comprises the following steps: obtaining 1 / 4 cycle sequence to determine 1 / 4 cycle voltage value and 1 / 4 cycle current value of each 1 / 4 cycle, and calculating fundamental current change rate, fundamental voltage change rate and fundamental phase angle change rate of continuous 1 / 4 cycle according to the 1 / 4 cycle voltage value and the 1 / 4 cycle current value; judging whether the power distribution state of the power distribution area is transiently generated according to the fundamental current change rate, the fundamental voltage change rate and the fundamental phase angle change rate, and if the power distribution state is not transiently generated, calculating corresponding 1 cycle voltage value and 1 cycle current value based on each cycle sequence of the power distribution area monitoring terminal; wherein the step of judging whether the power distribution state of the power distribution area is transiently generated according to the fundamental current change rate, the fundamental voltage change rate and the fundamental phase angle change rate comprises the following steps: in 1 cycle, if the sign of the fundamental current change rate and the fundamental voltage change rate is negative, it is judged that the power distribution state of the power distribution area is transiently generated; if the sign of the fundamental current change rate and the fundamental voltage change rate is positive, it is judged whether the fundamental current change rate, the fundamental voltage change rate and the fundamental phase angle change rate all exceed the first set threshold value, if yes, it is judged that the power distribution state of the power distribution area is transiently generated, and if no, harmonic voltage value and harmonic current value are obtained, and it is judged whether the power distribution state of the power distribution area is transiently generated according to the harmonic voltage value and the harmonic current value; calculating voltage change amplitude and current change amplitude according to the 1 cycle voltage value and the 1 cycle current value, and judging whether the power distribution state of the power distribution area is in steady state or dynamic state according to the voltage change amplitude and the current change amplitude.

2. The network state determination method for a network distribution area according to claim 1, characterized in that, The step of judging whether the power distribution state of the power distribution area is transiently generated according to the harmonic voltage value and the harmonic current value comprises the following steps: if the harmonic voltage value and the harmonic current value are both greater than the second set threshold value, it is judged that the power distribution state of the power distribution area is transiently generated; if any of the harmonic voltage value and the harmonic current value is not greater than the second set threshold value, it is judged whether the power distribution state of the power distribution area is in steady state or dynamic state.

3. The network state determination method for a network distribution area according to claim 1, characterized in that, The step of judging whether the power distribution state of the power distribution area is in steady state or dynamic state according to the voltage change amplitude and the current change amplitude comprises the following steps: if any of the voltage change amplitude and the current change amplitude is greater than the third set threshold value, it is judged that the power distribution state of the power distribution area is in dynamic state; if the power distribution state of the power distribution area does not satisfy the condition of judging whether it is transiently generated and the condition of judging whether it is in dynamic state, it is judged that the power distribution state of the power distribution area is in steady state.

4. A control method of a distribution network station area, characterized by, The power distribution area comprises a plurality of power distribution area monitoring terminals, the power distribution area monitoring terminal can execute the power distribution state judgment method of the power distribution area in any one of claims 1-3, and the control method of the power distribution area comprises the following steps: obtaining power distribution state judgment information of each power distribution area monitoring terminal, and transmitting the power distribution state judgment information to other power distribution area monitoring terminals of the power distribution area; The number of aware other power distribution area monitoring terminals receiving the power distribution state judgment information is determined, and if the number of aware other power distribution area monitoring terminals exceeds two, valid event information is generated to transmit the valid event information to the power distribution area remote server.

5. The control method of the network distribution station area according to claim 4, characterized in that, The control method of the power distribution area further includes: According to the power distribution area remote server receiving each valid event information corresponding to the power distribution area, the corresponding power distribution area control information between each power distribution area is generated.

6. A distribution network status judgment device for a distribution network area, characterized in that: It includes: The fundamental wave change rate determination module is configured to obtain 1 / 4 cycle sequence to determine the 1 / 4 cycle voltage value and the 1 / 4 cycle current value of each 1 / 4 cycle, and calculate the fundamental wave current change rate, the fundamental wave voltage change rate and the fundamental wave phase angle change rate according to the 1 / 4 cycle voltage value and the 1 / 4 cycle current value; The cycle value determination module is configured to determine whether the power distribution state of the power distribution area is transiently generated according to the fundamental wave current change rate, the fundamental wave voltage change rate and the fundamental wave phase angle change rate, and if the power distribution state is not transiently generated, calculate the corresponding 1 cycle voltage value and 1 cycle current value based on the 1 cycle sequence of the power distribution area monitoring terminal; wherein, the determination of whether the power distribution state of the power distribution area is transiently generated according to the fundamental wave current change rate, the fundamental wave voltage change rate and the fundamental wave phase angle change rate is specifically configured to: in 1 cycle, if the sign of the fundamental wave current change rate and the fundamental wave voltage change rate is negative, it is determined that the power distribution state of the power distribution area is transiently generated; if the sign of the fundamental wave current change rate and the fundamental wave voltage change rate is positive, it is determined whether the fundamental wave current change rate, the fundamental wave voltage change rate and the fundamental wave phase angle change rate all exceed the first set threshold, if yes, it is determined that the power distribution state of the power distribution area is transiently generated, and if no, the harmonic voltage value and the harmonic current value are obtained, and it is determined whether the power distribution state of the power distribution area is transiently generated according to the harmonic voltage value and the harmonic current value; The power distribution state judgment module is configured to calculate the voltage change amplitude and the current change amplitude according to the 1 cycle voltage value and the 1 cycle current value, and determine whether the power distribution state of the power distribution area is in a steady state or a dynamic state according to the voltage change amplitude and the current change amplitude.

7. A control device of a distribution network station area, characterized in that, The power distribution area includes a plurality of power distribution area monitoring terminals, and the power distribution area monitoring terminal can execute the power distribution state judgment method of the power distribution area in any one of claims 1-3, and the control device of the power distribution area includes: The information transmission module is configured to obtain the power distribution state judgment information of each power distribution area monitoring terminal, and transmit the power distribution state judgment information to other power distribution area monitoring terminals of the power distribution area; The information generation module is configured to determine the number of aware other power distribution area monitoring terminals receiving the power distribution state judgment information, and if the number of aware other power distribution area monitoring terminals exceeds two, generate valid event information to transmit the valid event information to the power distribution area remote server.

8. An electronic device, comprising: The electronic device includes: At least one processor; and The memory is connected in communication with the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to execute the power distribution state determination method of the power distribution area in any one of claims 1-3, and the control method of the power distribution area in any one of claims 4-5.

9. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer instructions for enabling the processor to implement the power distribution state determination method of the power distribution area in any one of claims 1-3, and the control method of the power distribution area in any one of claims 4-5 when executed.

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