A method and apparatus for determining loop connectivity in a three-way wiring structure

Abstract

This application discloses a method and apparatus for determining loop connectivity in a three-way junction structure. The solution provided in this application obtains the topology information, bus information, loop information, and switch information of the three-way junction structure in a substation. Then, it identifies the first and second loops whose connectivity needs to be determined. Next, it determines the connecting switch sequence between the first and second loops to construct the connectivity relationship between the first and second loops. When it is necessary to determine the loop connectivity of the three-way junction structure, it is only necessary to solve the connectivity relationship based on the constructed connectivity relationship and the on / off state of each switch element in the connecting switch sequence of the first and second loops. The loop connectivity between the first and second loops can be determined based on the solution. This method is suitable for loop connectivity determination in situations with high transient performance requirements.

Description

Technical Field

[0001] This application relates to the field of big data technology, and in particular to a method and apparatus for determining loop connectivity in a three-way wiring structure. Background Technology

[0002] The three-half connection is a common main wiring configuration in power plants, typically used in 500kV substations. In a three-half connection substation, several strings of circuit breakers are connected between two sets of busbars, with three circuit breakers in each string. Each pair of circuit breakers connects to a circuit, resulting in two circuits in total. This wiring configuration offers advantages such as high reliability, flexible operation, and ease of use. However, its secondary systems, such as protection devices and safety automation devices, are complex, especially in automatically determining the connectivity between different circuits.

[0003] Currently, the connectivity determination method between different circuits within a substation is mainly achieved by determining whether the circuit is connected to the same bus or only whether it is connected to the substation bus. The switching of the switch position is usually around 100ms. When the DC transmission circuit is disconnected, there will be voltage over-limit problems in tens of milliseconds. The determination method based solely on the switch position signal cannot be applied to occasions with high transient performance requirements. Summary of the Invention

[0004] This application provides a method and apparatus for determining the loop connectivity of a three-way wiring structure, which can be used to quickly determine the loop connectivity of a three-way wiring structure.

[0005] To achieve the aforementioned objective, the first aspect of this application provides a method for determining loop connectivity in a three-half wiring structure, comprising:

[0006] Obtain topology information, busbar information, circuit information, and switch information for two-thirds of the wiring structure in the substation;

[0007] Identify the first and second loops in the loop information that require connectivity determination;

[0008] Based on the topology information and the switch information, determine the connection switch sequence between the first circuit and the second circuit;

[0009] Based on the connection switch sequence between the first circuit and the second circuit, construct the connection state relationship between the first circuit and the second circuit;

[0010] The connection state relationship is assigned a value based on the on / off state of each switching element in the connection switch sequence of the first circuit and the second circuit;

[0011] By solving the connectivity state relation, the connectivity judgment result between the first loop and the second loop can be determined based on the solution result.

[0012] Preferably, when the first circuit and the second circuit are not in the same series, the connection switch sequence of the first circuit and the second circuit is: the connection switch sequence between the first circuit and the first bus, the connection switch sequence between the first circuit and the second bus, the connection switch sequence between the second circuit and the second bus, the connection switch sequence between the second circuit and the first bus, and the connection switch sequence between the first bus and the second bus.

[0013] When the first circuit and the second circuit are in the same series, the connection switch sequence between the first circuit and the second circuit is: the connection switch sequence between the first circuit and the first bus, the connection switch sequence between the first circuit and the second bus, the connection switch sequence between the second circuit and the first bus, the connection switch sequence between the second circuit and the second bus, the connection switch sequence between the first bus and the second bus, and the open / closed position switch sequence between the first circuit and the second circuit.

[0014] Preferably, when the first circuit and the second circuit are not in the same series, the connection state relationship between the first circuit and the second circuit is specifically as follows:

[0015] L1L2=L1M1*L2M1+L1M2*L2M2+L1M1*L2M2*M1M2+L1M2*L2M1*M1M2

[0016] In the formula, L1M1 is the connection switch sequence between the first circuit and the first bus, L2M1 is the connection switch sequence between the second circuit and the first bus, L1M2 is the connection switch sequence between the first circuit and the second bus, L2M2 is the connection switch sequence between the second circuit and the second bus, and M1M2 is the connection switch sequence between the first bus and the second bus.

[0017] Preferably, when the first circuit and the second circuit are in the same series, the connection state relationship between the first circuit and the second circuit is specifically as follows:

[0018] L1L2=M_L1L2+L1M1*L2M2*M1M2+L1M2*L2M1*M1M2

[0019] In the formula, L1M1 is the connection switch sequence between the first circuit and the first bus, L2M1 is the connection switch sequence between the second circuit and the first bus, L1M2 is the connection switch sequence between the first circuit and the second bus, L2M2 is the connection switch sequence between the second circuit and the second bus, M1M2 is the connection switch sequence between the first bus and the second bus, and M_L1L2 is the open / closed position switch sequence between the first circuit and the second circuit.

[0020] Preferably, it further includes:

[0021] When a change in the state of a switching element is detected, the sequence value corresponding to the switching element is updated according to the switching state after the change.

[0022] When protection action information is detected, the target switch is determined according to the correspondence between the protection action information and the switching element, and the sequence value corresponding to the target switch in the connection state relationship is set to the disconnect value.

[0023] Meanwhile, a second aspect of this application provides a loop continuity determination device with a three-way wiring structure, comprising:

[0024] The information acquisition unit is used to acquire topology information, busbar information, circuit information, and switch information of the three-quarters wiring structure in the substation;

[0025] The loop determination unit is used to determine the first loop and the second loop whose connectivity needs to be determined in the loop information;

[0026] A connection switch sequence determination unit is used to determine the connection switch sequence between the first circuit and the second circuit based on the topology information and the switch information;

[0027] The connectivity state relationship construction unit is used to construct the connectivity state relationship between the first loop and the second loop based on the connectivity switch sequence between the first loop and the second loop;

[0028] The formula assignment unit is used to assign values ​​to the connection state relationship formula according to the on / off state of each switch element in the connection switch sequence of the first circuit and the second circuit.

[0029] The loop connectivity discrimination unit is used to solve the connectivity state relationship to determine the connectivity discrimination result between the first loop and the second loop based on the solution result.

[0030] Preferably, when the first circuit and the second circuit are not in the same series, the connection switch sequence of the first circuit and the second circuit is: the connection switch sequence between the first circuit and the first bus, the connection switch sequence between the first circuit and the second bus, the connection switch sequence between the second circuit and the second bus, the connection switch sequence between the second circuit and the first bus, and the connection switch sequence between the first bus and the second bus.

[0031] When the first circuit and the second circuit are in the same series, the connection switch sequence between the first circuit and the second circuit is: the connection switch sequence between the first circuit and the first bus, the connection switch sequence between the first circuit and the second bus, the connection switch sequence between the second circuit and the first bus, the connection switch sequence between the second circuit and the second bus, the connection switch sequence between the first bus and the second bus, and the open / closed position switch sequence between the first circuit and the second circuit.

[0032] Preferably, when the first circuit and the second circuit are not in the same series, the connection state relationship between the first circuit and the second circuit is specifically as follows:

[0033] L1L2=L1M1*L2M1+L1M2*L2M2+L1M1*L2M2*M1M2+L1M2*L2M1*M1M2

[0034] In the formula, L1M1 is the connection switch sequence between the first circuit and the first bus, L2M1 is the connection switch sequence between the second circuit and the first bus, L1M2 is the connection switch sequence between the first circuit and the second bus, L2M2 is the connection switch sequence between the second circuit and the second bus, and M1M2 is the connection switch sequence between the first bus and the second bus.

[0035] Preferably, when the first circuit and the second circuit are in the same series, the connection state relationship between the first circuit and the second circuit is specifically as follows:

[0036] L1L2=M_L1L2+L1M1*L2M2*M1M2+L1M2*L2M1*M1M2

[0037] In the formula, L1M1 is the connection switch sequence between the first circuit and the first bus, L2M1 is the connection switch sequence between the second circuit and the first bus, L1M2 is the connection switch sequence between the first circuit and the second bus, L2M2 is the connection switch sequence between the second circuit and the second bus, M1M2 is the connection switch sequence between the first bus and the second bus, and M_L1L2 is the open / closed position switch sequence between the first circuit and the second circuit.

[0038] Preferably, it further includes:

[0039] A switching element state monitoring unit is used to update the sequence value corresponding to the switching element according to the switching state after the change when a change in the switching element state is detected.

[0040] The protection action trigger monitoring unit is used to determine the target switch based on the correspondence between the protection action information and the switching element when the protection action information is detected, and to set the sequence value corresponding to the target switch in the connection state relationship to the disconnect value.

[0041] As can be seen from the above technical solutions, this application has the following advantages:

[0042] The solution provided in this application obtains the topology, busbar, circuit, and switch information of a three-way junction structure in a substation. It then identifies the first and second circuits whose connectivity needs to be determined. Next, it constructs a connectivity relationship between the first and second circuits by determining the connected switch sequence. When determining the circuit connectivity of a three-way junction structure, it only needs to solve the connectivity relationship based on the constructed relationship and the on / off states of each switch element in the connected switch sequence of the first and second circuits. The circuit connectivity between the first and second circuits can be determined based on the solution. This solution is suitable for circuit connectivity determination in applications with high transient performance requirements. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a flowchart illustrating an embodiment of a loop connectivity determination method for a three-way wiring structure provided in this application.

[0045] Figure 2 This is a topology diagram of a three-way wiring structure for a substation.

[0046] Figure 3 This is a flowchart illustrating a complete embodiment of a loop connectivity determination method for a three-way wiring structure provided in this application.

[0047] Figure 4 This is a schematic diagram of an embodiment of a loop connectivity determination device with a three-way wiring structure provided in this application. Detailed Implementation

[0048] This application provides a method and apparatus for determining the loop connectivity of a three-way wiring structure, which can be used to quickly determine the loop connectivity of a three-way wiring structure.

[0049] To make the inventive objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0050] Please see Figure 1 The first aspect of this application provides a method for determining loop continuity in a three-half wiring structure, comprising:

[0051] Step 101: Obtain the topology information, busbar information, circuit information, and switch information of the three-quarters wiring structure in the substation.

[0052] First, information such as the substation's topology, busbars, circuits, and switches is collected. Among these, [the following information is used]. Figure 2 The busbar information shown includes busbar number information, denoted as M1, M2; circuit information includes circuit number information, denoted as l11, l12, l21, l22, l31, l32..., generally notated as ln1 or ln2; switch information includes switch number and switch status information, switch number denoted as a1, a2, a3, b1, b2, b3, c1, c2, c3..., generally notated as x1, x2, x3; switch open / closed status is denoted as A1, A2, A3, B1, B2, B3..., generally notated as X1, X2, X3, with values ​​of 1 or 0, where 1 represents closed and 0 represents open. The open / closed status of the switch can represent each individual phase of the three-phase system or the three phases as a whole. For a single phase, the actual closed status of the switch directly corresponds to its numerical value.

[0053] Step 102: Determine the first and second loops in the loop information that need to be judged for connectivity.

[0054] Then select the loop numbers whose connectivity needs to be determined, namely the first loop and the second loop, denoted as L1 and L2 respectively.

[0055] Step 103: Determine the connection switch sequence between the first circuit and the second circuit based on the topology information and switch information.

[0056] Step 104: Based on the connection switch sequence between the first circuit and the second circuit, construct the connection state relationship between the first circuit and the second circuit.

[0057] Next, based on the topology information of the three-half wiring structure of the substation obtained in step 101 and the switch information in the wiring structure, the connection switch sequence between the first circuit and the second circuit is determined. The connection switch sequence between the first circuit and the second circuit includes, but is not limited to: the connection switch sequence between circuits L1 and L2 and bus M1 and bus M2 (denoted as L1M1, L1M2, L2M1, and L2M2, respectively), and the connection switch sequence between bus M1 and bus M2 (denoted as M1M2). Then, based on the connection switch sequence between the first circuit and the second circuit, the connection state relationship L1L2 between the first circuit and the second circuit is constructed.

[0058] by Figure 2 Taking the topology shown as an example, the sequence of connected switches can represent:

[0059] If L1M1 and L2M1 = X1, it means that the circuit is connected to M1 only through the side switch;

[0060] If L1M1 and L2M1 = X1X2, it means that the circuit is connected to M1 through the middle switch and the side switch;

[0061] If L1M2 and L2M2 = X2X3, it means the circuit is connected to M2 through the middle switch and the side switch.

[0062] If L1M2 and L2M2 = X3, it means that the circuit is connected to M2 only through the side switch;

[0063] M1M2 = X1X2X3, which means that there are three switches connecting the busbars M1 and M2.

[0064] Step 105: Assign values ​​to the connection state relationship formula based on the on / off state of each switching element in the connection switch sequence of the first and second circuits.

[0065] Step 106: Solve the connectivity relation to determine the connectivity judgment result between the first loop and the second loop based on the solution result.

[0066] After constructing the corresponding connectivity state relations L1L2, values ​​are assigned to the connectivity state relations based on the on / off states of each switching element in the connected switch sequence of the first and second loops. For example, when... Figure 2 In the topology, only switches a1 and b2 are closed, so A1 = 1, B2 = 1, and the rest are 0.

[0067] The connectivity relationship is then solved to determine the connectivity judgment result between the first and second loops based on the solution. If L1L2 = 0, it means that L1 and L2 are not connected. If L1L2 > 0, it means that L1 and L2 are connected. In addition, it should be noted that when this method is used to determine the loop connectivity of a three-phase network, any two phases must be connected to determine connectivity, and any two phases must be disconnected to determine disconnection.

[0068] The above content is a detailed description of one embodiment of the loop connectivity determination method for a three-way wiring structure provided in this application. The following is a detailed description of another embodiment of the loop connectivity determination method for a three-way wiring structure provided in this application.

[0069] Please see Figure 3 Based on the previous embodiment, this embodiment further provides a more specific method for determining loop connectivity in a three-half wiring structure, including:

[0070] Furthermore, based on the different topological relationships between the selected first loop and the second loop, the relationship between the first loop and the second loop can be divided into non-co-string loops and co-string loops.

[0071] When the first circuit and the second circuit are not in the same series, the connection switch sequence between the first circuit and the second circuit is as follows: connection switch sequence between the first circuit and the first busbar L1M1, connection switch sequence between the first circuit and the second busbar L1M2, connection switch sequence between the second circuit and the second busbar L2M2, connection switch sequence between the second circuit and the first busbar L2M1, and connection switch sequence between the first busbar and the second busbar M1M2. The specific connection state relationship between the first circuit and the second circuit is as follows:

[0072] L1L2=L1M1*L2M1+L1M2*L2M2+L1M1*L2M2*M1M2+L1M2*L2M1*M1M2

[0073] by Figure 2 Taking the topological structure as an example, let L1 = l11, L2 = l22. Since L1 and L2 are different strings, the calculation state is as follows:

[0074] The connection status of the L1-M1 busbar is L1M1=A1;

[0075] The connection status of the L1-M2 busbar is L1M2 = A2A3;

[0076] The connection status of the L2-M1 busbar connection is L2M1 = B1B2;

[0077] The connection status of the L2-M2 busbar connection is L2M2=B3;

[0078] The connection status of busbars M1 and M2 is M1M2=A1A2A3+B1B2B3+C1C2C3;

[0079] Therefore, the connection state expression of loops L1 and L2 is:

[0080] L1L2=L1M1*L2M1+L1M2*L2M2+L1M1*L2M2*M1M2+L1M2*L2M1*M1M2

[0081] =A1B1B2+A2A3B3+(A1B3+A2A3B1B2)*(A1A2A3+B1B2B3+C1C2C3)

[0082] (1) When switches a1, b1, and b2 are closed and the other switches are open:

[0083] L1L2=1, and the loops l11 and l22 are connected.

[0084] (2) When switches a2, a3, and b3 are closed, and the other switches are open:

[0085] L1L2=1, and the loops l11 and l22 are connected.

[0086] (3) When switches a1, b3, c1, c2, and c3 are closed, and the other switches are open:

[0087] L1L2=1, and the loops l11 and l22 are connected.

[0088] If switch C2 is open, L1L2 = 0, and loops L11 and L22 are not connected.

[0089] When the first circuit and the second circuit are in the same series, the connection switch sequence between the first circuit and the second circuit is as follows: L1M1 (connection switch sequence between the first circuit and the first bus), L1M2 (connection switch sequence between the first circuit and the second bus), L2M1 (connection switch sequence between the second circuit and the first bus), L2M2 (connection switch sequence between the second circuit and the second bus), and M1M2 (connection switch sequence between the first bus and the second bus), plus: M_L1L2 (open / closed switch sequence between the first circuit and the second circuit). In this case, the connection state relationship between the first circuit and the second circuit is specifically as follows:

[0090] L1L2=M_L1L2+L1M1*L2M2*M1M2+L1M2*L2M1*M1M2

[0091] by Figure 2 Taking the topological structure as an example, let L1 = l11 and L2 = l12. Since L1 and L2 are in the same string, the calculation state is as follows:

[0092] The corresponding switch positions in the circuit are M_L1L2=A2;

[0093] The connection status of the L1-M1 busbar is L1M1=A1;

[0094] The connection status of the L1-M2 busbar is L1M2 = A2A3;

[0095] The connection status of the L2-M1 busbar connection is L2M1 = A1A2;

[0096] The connection status of the L2-M2 busbar connection is L2M2=A3;

[0097] The connection status of busbars M1 and M2 is M1M2=A1A2A3+B1B2B3+C1C2C3;

[0098] Therefore, the connection state expression of loops L1 and L2 is:

[0099] L1L2=M_L1L2+L1M1*L2M2*M1M2+L1M2*L2M1*M1M2

[0100] =A2+(A1A3+A1A2*A2A3)*(A1A2A3+B1B2B3+C1C2C3)

[0101] (1) When only switch a2 is closed and the other switches are open:

[0102] L1L2=1, the loops l11 and l12 are connected.

[0103] (2) When switches a1, a3, b1, b2, and b3 are closed, and the other switches are open:

[0104] L1L2=1, and the loops l11 and l12 are connected.

[0105] (3) When switches a1, a3, c1, and c3 are closed, and the other switches are open:

[0106] L1L2=0, the loops l11 and l12 are disconnected.

[0107] Furthermore, it also includes:

[0108] When protection action information is detected, the target switch is determined according to the correspondence between the protection action information and the switching element, and the sequence value corresponding to the target switch in the connection state relationship is set to the disconnect value.

[0109] It should be noted that when the switch position changes, L1 and L2 are recalculated to determine the circuit connectivity.

[0110] When the component protection activates, such as TXn becoming 1, the Xn switch position value is forcibly reset to 0 within a time interval T, and the L1L2 values ​​are recalculated to determine the circuit connectivity. Then, after the protection activation has elapsed for time T, TXn can be cleared to 0, and the Xn data can be synchronized with the actual switch position information to recalculate L1L2 and determine the circuit connectivity.

[0111] For example, when switches a1, a3, b1, b2, and b3 are closed, and when Ta1 is activated (e.g., circuit l11 protection activation, switch a1 protection activation, or bus M1 protection activation), A1 will be forcibly set to 0. At this time, L1L2 = 0, and it will be determined that l11 and l12 are not connected.

[0112] If, after time T (e.g., 5 seconds), the switch a1 is actually open, then A1 = 0, L1L2 = 0 is calculated, and l11 and l12 are considered not connected; if, after time T (e.g., 5 seconds), the switch a1 is not actually open, then A1 = 1, L1L2 = 1 is calculated, and l11 and l12 are considered connected again.

[0113] For example, if Tc2 is activated (e.g., circuit l31, l32 protection activation, switch c2 protection activation), C2 is forced to 0, L1L2 = 0, and circuits l11 and l22 are in a non-connected state.

[0114] If, after time T, switch c2 is found to be actually open, then C2 = 0, L1L2 = 0, and l11 and l12 are considered not connected. If, after time T, switch c1 is found not to be actually open, then C2 = 1, L1L2 = 1, and l11 and l12 are considered connected again.

[0115] The above content describes a loop connectivity determination method for a three-way wiring structure provided by this application. The following is a detailed description of an embodiment of a loop connectivity determination device for a three-way wiring structure provided by this application.

[0116] Please see Figure 4 The third embodiment of this application provides a loop continuity determination device with a three-way wiring structure, comprising:

[0117] The information acquisition unit 201 is used to acquire topology information, busbar information, circuit information and switch information of the three-way wiring structure in the substation;

[0118] The loop determination unit 202 is used to determine the first loop and the second loop whose connectivity needs to be determined in the loop information;

[0119] The connection switch sequence determination unit 203 is used to determine the connection switch sequence between the first circuit and the second circuit based on the topology information and the switch information.

[0120] The connection state relationship construction unit 204 is used to construct the connection state relationship between the first loop and the second loop based on the connection switch sequence between the first loop and the second loop;

[0121] The formula assignment unit 205 is used to assign values ​​to the connection state relationship formula according to the on / off state of each switch element in the connection switch sequence of the first circuit and the second circuit.

[0122] The loop connectivity discrimination unit 206 is used to solve the connectivity state relation to determine the connectivity discrimination result between the first loop and the second loop based on the solution result.

[0123] Furthermore, when the first circuit and the second circuit are not in the same series, the connection switch sequence of the first circuit and the second circuit is: the connection switch sequence between the first circuit and the first bus, the connection switch sequence between the first circuit and the second bus, the connection switch sequence between the second circuit and the second bus, the connection switch sequence between the second circuit and the first bus, and the connection switch sequence between the first bus and the second bus.

[0124] When the first circuit and the second circuit are in the same series, the connection switch sequence between the first circuit and the second circuit is as follows: the connection switch sequence between the first circuit and the first bus, the connection switch sequence between the first circuit and the second bus, the connection switch sequence between the second circuit and the first bus, the connection switch sequence between the second circuit and the second bus, the connection switch sequence between the first bus and the second bus, and the open / closed position switch sequence between the first circuit and the second circuit.

[0125] Furthermore, when the first loop and the second loop are not in the same series, the connection state relationship between the first loop and the second loop is specifically as follows:

[0126] L1L2=L1M1*L2M1+L1M2*L2M2+L1M1*L2M2*M1M2+L1M2*L2M1*M1M2

[0127] In the formula, L1M1 is the connection switch sequence between the first circuit and the first bus, L2M1 is the connection switch sequence between the second circuit and the first bus, L1M2 is the connection switch sequence between the first circuit and the second bus, L2M2 is the connection switch sequence between the second circuit and the second bus, and M1M2 is the connection switch sequence between the first bus and the second bus.

[0128] Furthermore, when the first loop and the second loop are in the same series, the connection state relationship between the first loop and the second loop is specifically as follows:

[0129] L1L2=M_L1L2+L1M1*L2M2*M1M2+L1M2*L2M1*M1M2

[0130] In the formula, L1M1 is the connection switch sequence between the first circuit and the first bus, L2M1 is the connection switch sequence between the second circuit and the first bus, L1M2 is the connection switch sequence between the first circuit and the second bus, L2M2 is the connection switch sequence between the second circuit and the second bus, M1M2 is the connection switch sequence between the first bus and the second bus, and M_L1L2 is the open / closed position switch sequence between the first circuit and the second circuit.

[0131] Furthermore, it also includes:

[0132] The switching element state monitoring unit 2001 is used to update the sequence value corresponding to the switching element according to the switching state after the change when a change in the switching element state is detected.

[0133] The protection action triggering monitoring unit 2002 is used to determine the target switch according to the correspondence between the protection action information and the switching element when the protection action information is detected, and to set the sequence value corresponding to the target switch in the connection state relationship to the disconnect value.

[0134] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the terminals, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0135] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0136] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0137] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0138] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0139] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks. The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of this application.

Claims

1. A method for determining loop connectivity in a three-half wiring structure, characterized in that, include: Obtain topology information, busbar information, circuit information, and switch information for two-thirds of the wiring structure in the substation; Identify the first and second loops in the loop information that require connectivity determination; Based on the topology information and the switch information, determine the connection switch sequence between the first circuit and the second circuit; Based on the connection switch sequence between the first circuit and the second circuit, construct the connection state relationship between the first circuit and the second circuit; The connection state relationship is assigned a value based on the on / off state of each switching element in the connection switch sequence of the first circuit and the second circuit; By solving the connectivity state relation, the connectivity judgment result between the first loop and the second loop can be determined based on the solution result; Wherein, when the first circuit and the second circuit are not in the same series, the connection switch sequence of the first circuit and the second circuit is: the connection switch sequence between the first circuit and the first bus, the connection switch sequence between the first circuit and the second bus, the connection switch sequence between the second circuit and the second bus, the connection switch sequence between the second circuit and the first bus, and the connection switch sequence between the first bus and the second bus. When the first circuit and the second circuit are in the same series, the connection switch sequence between the first circuit and the second circuit is: the connection switch sequence between the first circuit and the first bus, the connection switch sequence between the first circuit and the second bus, the connection switch sequence between the second circuit and the first bus, the connection switch sequence between the second circuit and the second bus, the connection switch sequence between the first bus and the second bus, and the open / closed position switch sequence between the first circuit and the second circuit.

2. The method for determining loop connectivity of a three-half wiring structure according to claim 1, characterized in that, When the first circuit and the second circuit are not in the same series, the connection state relationship between the first circuit and the second circuit is as follows: L1L2=L1M1*L2M1+L1M2*L2M2+L1M1*L2M2*M1M2+L1M2*L2M1*M1M2 In the formula, L1M1 is the connection switch sequence between the first circuit and the first bus, L2M1 is the connection switch sequence between the second circuit and the first bus, L1M2 is the connection switch sequence between the first circuit and the second bus, L2M2 is the connection switch sequence between the second circuit and the second bus, and M1M2 is the connection switch sequence between the first bus and the second bus.

3. The method for determining loop connectivity of a three-half wiring structure according to claim 1, characterized in that, When the first circuit and the second circuit are in the same series, the connection relationship between the first circuit and the second circuit is as follows: L1L2=M_L1L2+L1M1*L2M2*M1M2+ L1M2*L2M1*M1M2 In the formula, L1M1 is the connection switch sequence between the first circuit and the first bus, L2M1 is the connection switch sequence between the second circuit and the first bus, L1M2 is the connection switch sequence between the first circuit and the second bus, L2M2 is the connection switch sequence between the second circuit and the second bus, M1M2 is the connection switch sequence between the first bus and the second bus, and M_L1L2 is the open / closed position switch sequence between the first circuit and the second circuit.

4. A method for determining loop connectivity in a three-half wiring structure according to claim 2 or 3, characterized in that, Also includes: When a change in the state of a switching element is detected, the sequence value corresponding to the switching element is updated according to the switching state after the change. When protection action information is detected, the target switch is determined according to the correspondence between the protection action information and the switching element, and the sequence value corresponding to the target switch in the connection state relationship is set to the disconnect value.

5. A loop continuity determination device with a two-thirds wiring structure, characterized in that, include: The information acquisition unit is used to acquire topology information, busbar information, circuit information, and switch information of the three-quarters wiring structure in the substation; The loop determination unit is used to determine the first loop and the second loop whose connectivity needs to be determined in the loop information; A connection switch sequence determination unit is used to determine the connection switch sequence between the first circuit and the second circuit based on the topology information and the switch information; The connectivity state relationship construction unit is used to construct the connectivity state relationship between the first loop and the second loop based on the connectivity switch sequence between the first loop and the second loop; The formula assignment unit is used to assign values ​​to the connection state relationship formula according to the on / off state of each switch element in the connection switch sequence of the first circuit and the second circuit. The loop connectivity discrimination unit is used to solve the connectivity state relation to determine the connectivity discrimination result between the first loop and the second loop based on the solution result. When the first circuit and the second circuit are not in the same series, the connection switch sequence between the first circuit and the second circuit is: the connection switch sequence between the first circuit and the first bus, the connection switch sequence between the first circuit and the second bus, the connection switch sequence between the second circuit and the second bus, the connection switch sequence between the second circuit and the first bus, and the connection switch sequence between the first bus and the second bus. When the first circuit and the second circuit are in the same series, the connection switch sequence between the first circuit and the second circuit is: the connection switch sequence between the first circuit and the first bus, the connection switch sequence between the first circuit and the second bus, the connection switch sequence between the second circuit and the first bus, the connection switch sequence between the second circuit and the second bus, the connection switch sequence between the first bus and the second bus, and the open / closed position switch sequence between the first circuit and the second circuit.

6. The loop connectivity determination device with a two-thirds wiring structure according to claim 5, characterized in that, When the first circuit and the second circuit are not in the same series, the connection state relationship between the first circuit and the second circuit is as follows: L1L2=L1M1*L2M1+L1M2*L2M2+L1M1*L2M2*M1M2+L1M2*L2M1*M1M2 In the formula, L1M1 is the connection switch sequence between the first circuit and the first bus, L2M1 is the connection switch sequence between the second circuit and the first bus, L1M2 is the connection switch sequence between the first circuit and the second bus, L2M2 is the connection switch sequence between the second circuit and the second bus, and M1M2 is the connection switch sequence between the first bus and the second bus.

7. A loop continuity determination device with a two-thirds wiring structure according to claim 5, characterized in that, When the first circuit and the second circuit are in the same series, the connection relationship between the first circuit and the second circuit is as follows: L1L2=M_L1L2+L1M1*L2M2*M1M2+ L1M2*L2M1*M1M2 In the formula, L1M1 is the connection switch sequence between the first circuit and the first bus, L2M1 is the connection switch sequence between the second circuit and the first bus, L1M2 is the connection switch sequence between the first circuit and the second bus, L2M2 is the connection switch sequence between the second circuit and the second bus, M1M2 is the connection switch sequence between the first bus and the second bus, and M_L1L2 is the open / closed position switch sequence between the first circuit and the second circuit.

8. A loop continuity determination device with a two-thirds wiring structure according to claim 6 or 7, characterized in that, Also includes: A switching element state monitoring unit is used to update the sequence value corresponding to the switching element according to the switching state after the change when a change in the switching element state is detected. The protection action trigger monitoring unit is used to determine the target switch based on the correspondence between the protection action information and the switching element when the protection action information is detected, and to set the sequence value corresponding to the target switch in the connection state relationship to the disconnect value.

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