CN110429586B - Analysis method and device of power supply system - Google Patents
Analysis method and device of power supply system Download PDFInfo
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- CN110429586B CN110429586B CN201910639514.4A CN201910639514A CN110429586B CN 110429586 B CN110429586 B CN 110429586B CN 201910639514 A CN201910639514 A CN 201910639514A CN 110429586 B CN110429586 B CN 110429586B
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Abstract
The embodiment of the application provides an analysis method and device of a power supply system and electronic equipment, and relates to the technical field of power supply systems, wherein the method comprises the following steps: analyzing a model file corresponding to the power supply system to obtain a connection relation between each piece of power equipment in the power supply system; traversing each incoming line of the power supply system, and acquiring the opening and closing state of a switch on each incoming line and the opening and closing state of switches on connecting paths among the power equipment; determining the running state of each power device in a first substation according to the opening and closing state of a switch on a connection path between each power device in the first substation in the power supply system and the opening and closing state of a switch on an inlet wire connected with the first substation; and obtaining the operation state of the first substation in the power supply system according to the operation state of each power device in the first substation. The analysis of this scheme to the electric substation running state is more meticulous, and is accurate, owing to need not artifical monitoring, has saved manpower and materials, and is more convenient.
Description
Technical Field
The present disclosure relates to the field of power supply systems, and in particular, to an analysis method and apparatus for a power supply system, and an electronic device.
Background
The analysis of the operation state of the substation is an important measure for an operator on duty to master the performance and weak links of the equipment, master the change rule of accidents, ensure the safe production and improve the safety consciousness. By analyzing the running state of the substation, the abnormal antecedent consequence can be known, the accident forecast is made, the possible accident is prevented, and convenience is provided for the power grid to overhaul and process the abnormal defects.
The analysis work of the running state of the existing substation is that the field measurement is carried out by manpower regularly, the hidden danger of the power equipment is difficult to find in time, the running state of the substation is monitored and recorded manually, time and labor are wasted, the data is inaccurate, the running state of the substation is generally analyzed only by normal running and quitting running, and the running state of the substation is not analyzed accurately enough.
Disclosure of Invention
An object of the embodiment of the application is to provide an analysis method for a power supply system, which overcomes the defects that the existing manual monitoring of the operation state of a substation wastes time and labor, and the analysis of the operation state is not fine enough.
The embodiment of the application provides an analysis method of a power supply system, which comprises the following steps:
analyzing a model file corresponding to the power supply system to obtain a connection relation between each piece of power equipment in the power supply system;
traversing each incoming line of the power supply system, and acquiring the opening and closing state of a switch on each incoming line and the opening and closing state of switches on connecting paths among the power equipment;
determining the running state of each power device in a first substation according to the opening and closing state of a switch on a connection path between each power device in the first substation in the power supply system and the opening and closing state of a switch on an inlet wire connected with the first substation;
and obtaining the operation state of the first substation in the power supply system according to the operation state of each power device in the first substation.
According to the technical scheme provided by the foregoing exemplary embodiment of the present application, according to the open-close state of the switch on the power equipment connection path and the open-close state of the switch on the incoming line, the operation state of each power equipment in the first substation can be determined according to the open-close state of the switch on the connection path between the power equipment in the first substation and the open-close state of the switch on the incoming line connected to the first substation, so as to obtain the operation state of the first substation. The analysis to the substation running state is more meticulous, and is accurate, owing to need not artifical monitoring, has saved manpower and materials, also is more convenient.
In one embodiment, determining the operating state of each power device in the first substation according to the open/close state of the switch on the connection path between each power device in the first substation in the power supply system and the open/close state of the switch on the incoming line connected to the first substation includes:
determining the electrified condition of a high-voltage side bus of the first substation according to the opening and closing condition of a switch on an inlet wire connected with the first substation;
according to the opening and closing state of a switch on a connection path between each electric device in the first substation, determining the connectivity between each electric device in the first substation and a high-voltage side bus of the first substation and the connectivity between each electric device in the first substation and a low-voltage side bus of the first substation;
and aiming at each power device in the first substation, determining the running state of each power device in the first substation according to the connectivity of each power device with the high-voltage side bus of the first substation, the low-voltage side bus of the first substation and the electrification condition of the high-voltage side bus of the first substation.
According to the technical scheme provided by the above exemplary embodiment of the application, the operation state of the power equipment can be determined by judging the electrification condition of the high-voltage side bus and the connectivity of the power equipment with the high-voltage side bus and the low-voltage side bus, so that the operation state of the substation is more finely analyzed, and each power equipment in the substation is refined.
In one embodiment, for each power device in the first substation, determining an operating state of each power device in the first substation according to connectivity of the power device with the high-voltage side bus of the first substation, the low-voltage side bus of the first substation, and a live condition of the high-voltage side bus of the first substation includes:
for each power device in the first substation, if the power device is respectively communicated with the high-voltage side bus of the first substation and the low-voltage side bus of the first substation, and the high-voltage side bus of the first substation is electrified, determining that the power device operates.
According to the technical scheme provided by the above exemplary embodiment of the application, when it is determined that the power equipment in the first substation is communicated with the high-voltage side bus of the first substation and the low-voltage side bus of the first substation, and the high-voltage side bus of the first substation is electrified, the power equipment can be considered to be operated, so that the analysis of the operation state of the substation is refined to each power equipment.
In one embodiment, the obtaining the operating state of the first substation in the power supply system according to the operating state of each power device in the first substation includes:
if the first transformer operates, the second transformer operates to obtain that the operating state of the first substation is a first operating state;
if the first transformer is operated and the second transformer is not operated, the operation state of the first substation is obtained and is a second operation state;
if the first transformer does not operate, the second transformer operates to obtain that the operating state of the first substation is a third operating state;
and if the first transformer does not operate, the second transformer does not operate, and the operation state of the first substation is obtained to be a fourth operation state.
According to the technical scheme provided by the above exemplary embodiment of the application, the first power substation has all the multiple operation states, and not only operation or exit, but also single-machine operation is possible, so that the analysis on the operation state of the power substation is more accurate.
In one embodiment, after obtaining the operating state of the first substation in the power supply system according to the operating state of each power device in the first substation, the method further includes:
and if the undetached first substation exists according to the operation state of each first substation in the power supply system, obtaining the operation state of the second substation in the power supply system according to the connectivity between the undetached first substation and the second substation in the power supply system.
According to the technical scheme provided by the embodiment of the application, the operation state of the first substation is judged firstly in a layered and graded searching mode, and when the undetached first substations exist, the operation state of the second substation connected with the first substation is continuously judged, so that the problem that analysis time is wasted because analysis of the second substation is still performed when all the first substations are undetached is avoided.
In one embodiment, obtaining the operating status of the second substation in the power supply system according to the connectivity between the undeployed first substation and the second substation in the power supply system includes:
judging whether a high-voltage side bus of a second substation is communicated with a low-voltage side bus of a first substation which is not disconnected or is communicated with high-voltage side buses of other electrified substations according to the opening and closing state of a switch on a connecting path between each piece of power equipment, and determining the electrified condition of the high-voltage side bus of the second substation;
determining the running state of each power device in the second substation according to the connectivity of the power device in the second substation with a high-voltage side bus of the second substation, the connectivity of a low-voltage side bus of the second substation and the electrification condition of the high-voltage side bus of the second substation;
and obtaining the operating state of the second substation according to the operating state of each power device in the second substation.
According to the technical scheme provided by the embodiment of the application, the running state of each power device in the second substation can be determined by judging the live condition of the high-voltage side bus of the second substation and the connectivity of each power device in the second substation with the high-voltage side bus and the low-voltage side bus, so that the running state of the second substation can be obtained, the running state of the second substation can be analyzed more carefully and more accurately, and the running condition of each power device in the substation can be known.
In one embodiment, determining whether the high-side bus of the second substation is in communication with the low-side bus of the undeployed first substation or in communication with the high-side bus of another live second substation, and determining the live condition of the high-side bus of the second substation includes:
and if the high-voltage side bus of the second substation is communicated with the low-voltage side bus of the undetached first substation or is communicated with the high-voltage side buses of other electrified second substations, determining that the high-voltage side bus of the second substation is electrified.
According to the technical scheme provided by the embodiment of the application, whether the high-voltage side bus of the second substation is electrified or not can be accurately judged by judging whether the high-voltage side bus of the second substation is communicated with the low-voltage side bus of the undetached first substation or whether the high-voltage side bus of the second substation is communicated with the high-voltage side buses of other electrified second substations.
In one embodiment, the second substation comprises a traction substation or a step-down substation; the traction substation comprises at least two sets of rectifier unit equipment; the step-down substation comprises at least two sets of distribution transformers; obtaining the operating state of the second substation according to the operating state of each power device in the second substation, including:
and outputting the operation state of the second substation corresponding to the number of the electrified power equipment according to the number of the electrified power equipment in the second substation.
According to the technical scheme provided by the above exemplary embodiment of the application, the second substation has all the multiple operation states, and not only operation or exit, but also single-machine operation is possible, so that the analysis on the operation state of the substation is more accurate.
On the other hand, the present application further provides an analysis device of a power supply system, the device including:
the connection relation obtaining module is used for analyzing the model file corresponding to the power supply system to obtain the connection relation between each piece of power equipment in the power supply system;
the switch state acquisition module is used for traversing each incoming line of the power supply system and acquiring the opening and closing state of a switch on each incoming line and the opening and closing state of a switch on a connecting path between each piece of power equipment;
the equipment state determining module is used for determining the running state of each piece of electric equipment in the first substation according to the switching state of a switch on a connection path between each piece of electric equipment in the first substation in the power supply system and the switching state of a switch on an inlet wire connected with the first substation;
and the operation state analysis module is used for obtaining the operation state of the first substation in the power supply system according to the operation state of each power device in the first substation.
In addition, this application still provides an electronic equipment, and electronic equipment includes:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to perform the analysis method of the power supply system.
Further, the present application also provides a computer-readable storage medium storing a computer program, which is executable by a processor to perform the analysis method of the power supply system.
The apparatus, the electronic device, and the computer-readable storage medium provided in the foregoing exemplary embodiments of the present application have the same technical effects as the analysis method of the foregoing power supply system.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be briefly described below.
Fig. 1 is a schematic application scenario diagram of an analysis method of a power supply system according to an exemplary embodiment of the present application;
fig. 2 is a schematic structural diagram of a terminal device 110 according to an exemplary embodiment of the present application;
FIG. 3 is a schematic flow chart diagram illustrating a method for analyzing a power supply system in accordance with an exemplary embodiment of the present application;
fig. 4 is a schematic connection relationship diagram of an urban rail transit power supply system according to an exemplary embodiment of the present application;
FIG. 5 is a schematic diagram illustrating the connection relationship of one of the main substations of FIG. 4, according to an exemplary embodiment of the present application;
FIG. 6 is a flowchart illustrating details of step 330 in a corresponding embodiment of FIG. 3 according to an exemplary embodiment of the present application;
fig. 7 is a schematic flow chart illustrating an analysis method of a power supply system according to another exemplary embodiment based on the corresponding embodiment of fig. 3;
FIG. 8 is a flowchart illustrating details of step 350 of the corresponding embodiment of FIG. 7, according to an exemplary embodiment of the present application;
FIG. 9 is a schematic diagram of a connection relationship of a traction substation shown in an exemplary embodiment of the present application;
fig. 10 is a schematic connection diagram of a step-down substation according to an exemplary embodiment of the present application;
fig. 11 is a block diagram of an analysis device of a power supply system according to an exemplary embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
Like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
Fig. 1 is an application scenario schematic diagram of an analysis method of a power supply system according to an embodiment of the present application. As shown in fig. 1, the application scenario includes a terminal device 110 and a power supply system 120, and a communication is communicated between the terminal device 110 and the power supply system 120 through network communication. The terminal device 110 may be a computer, a server, a cluster of servers, or a cloud computing center. The power supply system 120 may be an urban rail transit power supply system, and the urban rail transit power supply system may include power devices in different types of substations, such as a main substation, a traction substation, and a step-down substation, and may further include a power transmission line connecting each power device. The terminal device 110 may operate a Power Supervisory Control And Data Acquisition (PSCADA) system to realize Control And Data Acquisition of various devices in the Power supply system 120.
The terminal device 110 may store a model file of the power supply system 120 and an open/close state of each switch in the power supply system 120 monitored by the PSCADA system in advance, and analyze an operation state of a substation in the power supply system 120 by using the method provided in the present application.
Fig. 2 is a schematic structural diagram of a terminal device 110 according to an embodiment of the present disclosure. Referring to fig. 2, terminal device 110 may include a processing component 202, a memory 204, a power component 206, an audio component 208, a sensor component 210, and a communication component 212.
The processing element 202 controls overall operation of the terminal device 110, and in one embodiment, may be operations associated with display, data communication, and recording operations, among others. The processing components 202 may include one or more processors 214 to execute instructions to perform all or a portion of the steps of the methods described below. In addition, the processing component 202 may include one or more modules for communicating messages and processing data with other components.
The audio component 208 is configured to output and/or input audio signals, for example, the audio component 208 includes a Microphone (MIC). In one embodiment, the microphone is configured to receive the external audio signal when the terminal device 110 is in an operation mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 204 or transmitted via the communication component 212. In one embodiment, the audio component 208 further includes a speaker for outputting audio signals.
In one embodiment, terminal device 110 may be implemented by one or more Application Specific Integrated Circuits (ASICs), digital signal processors, digital signal processing devices, programmable logic devices, field programmable gate arrays, controllers, microcontrollers, microprocessors, or other electronic components configured to perform the methods described below.
Fig. 3 is a flowchart illustrating an analysis method of a power supply system according to an embodiment of the present invention, where an execution subject of the analysis method may be the terminal device, and the method may include the following steps:
step 310: analyzing a model file corresponding to the power supply system to obtain a connection relation between each piece of power equipment in the power supply system;
step 320: traversing each incoming line of the power supply system, and acquiring the opening and closing state of a switch on each incoming line and the opening and closing state of switches on connecting paths among the power equipment;
step 340: and obtaining the operation state of the first substation in the power supply system according to the operation state of each power device in the first substation.
The above steps are described in detail below.
In step 310, the model file corresponding to the power supply system is analyzed to obtain the connection relationship between the power devices in the power supply system.
The power supply system can be a large power grid system or an urban rail transit power supply system. The urban rail transit power supply system is stable in structure, small in node number, and an alternating current-direct current hybrid system has more detailed requirements on analysis of the operation state of a substation. In the following, an urban rail transit power supply system is taken as an example, and a large power grid system may refer to an embodiment of the urban rail transit power supply system.
The urban rail transit power supply system can be regarded as that all external power supplies (urban power grids) are connected through one virtual node. The external power supply can be equivalent to a balance node and is connected with all balance points through a virtual node, so that the urban rail transit power supply system only comprises a power supply partition and a plurality of isolated islands, and the power supply partition does not need to be divided again. Islanding refers to a power supply partition without power supply.
The Model file corresponding to the power supply system may be defined by Common Information Model (CIM), and is a file in eXtensible Markup Language (XML) format. The terminal equipment can call the corresponding function interface, analyze the model file and obtain the connection relation among the electric power equipment and the attribute of each electric power equipment. CIM model files can be exported from terminal equipment in advance, CIM is important content of IEC61970 series standards, research and application of existing CIM modeling are mainly concentrated in the field of large power grid systems, and the CIM modeling is less related to the field of urban rail transit power supply systems, so that CIM expansion can be performed on the urban rail transit power supply systems. The result obtained by analyzing the model file by the terminal equipment can be stored in the equipment container.
Each power device may include power devices included in all of the substations in the power supply system. In one embodiment, the power supply system may include a main substation, a traction substation, and a step-down substation, the main substation may include two sets of main transformers, the traction substation may include two sets of rectifier units, and the step-down substation may include two sets of distribution transformers. The connection relationship between the power devices refers to determining which power devices are connected through the power transmission line, and a switch on the power transmission line may be opened or closed.
Fig. 4 is a schematic connection relationship diagram of an urban rail transit power Supply system according to an embodiment, and as shown in fig. 4, a power Supply system shares a main substation (BSS) 2 seat on the whole line, which is labeled as BSS1 and BSS 2; a Traction Substation (TSS) 12 base, labeled TSS1, TSS2 … … TSS 12; and a Buck substation (DSS) 8 seat, which is marked as DSS1 and DSS2 … … DSS 8.
Fig. 5 is a schematic diagram of the connection relationship of one of the main substations in fig. 4. As shown in fig. 5, the main substation includes a first main transformer B1 and a second main transformer B2, wherein the input terminals of the first main transformer B1 and the second main transformer B2 are connected by a 110kV high-side bus, and the output terminals are connected by a 35kV low-side bus. The first incoming line L1 has a switch K1 and the second incoming line L2 has a switch K2, and the first incoming line L1 and the second incoming line L2 are connected to a 110kV high side bus respectively. A plurality of switches K are provided on a connection path between the first main transformer B1 and the second main transformer B23，K4K8. The switches K3 and K4 are bus-coupled switches on a 110kV high-voltage side bus; k7, K8 are bus tie switches on a 35kV low-voltage side bus.
As shown in fig. 5, when switch K1 on first incoming line L1 is closed (the 110kV high-voltage side busbar is conducted with first incoming line L1), and switch K5 on the connection path of first main transformer B1 and the 35kV low-voltage side busbar is closed (then first main transformer B1 is communicated with the 110kV high-voltage side busbar and the 35kV low-voltage side busbar), first main transformer B1 operates. Meanwhile, when the high-side bus switches K3 and K4 are also closed, and the switch K6 in the connection path between the second main transformer B2 and the 35kV low-side bus is also closed, the second main transformer B2 operates. Similarly, if the switch K2 on the second incoming line L2 is closed, the operating state of each main transformer can be determined according to the corresponding rule, and the operating state of the main substation is obtained and stored in the equipment container.
The connection relationship of each power device in the substation and the open/close state of the switch on the connection path may be established by a configuration (connectiline), which is specifically as follows:
take the 110kV bus in fig. 5 as an example. Assuming that the bus-bar switches K3 and K4 in the main substation are open and the other switches are closed, the connection relationship between the 110kV bus-bar section G1 and other electric devices in the structural body and the closed state (i.e., the connection state) of the switches on the connection path are as shown in table 1 below. Table 1 shows the connection relationship and connection state of the bus-section G1 of the main substation 110kV with other electric devices.
| strStartName | strEndName | strStartType | strEndType | ullStartID | ullEndID | bOpen |
| 110kVI female | 1# incoming line | BusbarSection | ACLineSegment | - | - | false |
| 110kVI female | 110kVII mother | BusbarSection | BusbarSection | - | - | true |
| 110kVI female | 1# Main transformer | BusbarSection | PowerTransformer | - | - | false |
"110 kVI bus" in table 1 represents the G1 section of the 110kV high side bus in fig. 5. The "1 # incoming line" represents the first incoming line L1 in fig. 5 and the "110 kVII bus" represents the G2 section of the 110kV high side bus in fig. 5. "1 # Main Transformer" represents the first Main Transformer B1 in FIG. 5.
False indicates no disconnection and true indicates disconnection. That is, there is no disconnection (i.e., continuity) between the first incoming line L1 and the 110kV bus, and since the buscouple switches K3 and K4 on the 110kV bus are disconnected, there is no disconnection (i.e., continuity) between the high-side bus segments G1 and G2, and there is no disconnection (i.e., continuity) between the 110kV bus and the first main transformer B1.
In step 320, each incoming line of the power supply system is traversed to obtain the open-close state of the switch on each incoming line and the open-close state of the switch on the connection path between each power device.
The incoming line refers to a power transmission line connected with an external power supply, and the switch on the incoming line can be a master switch for connecting the external power supply into a power supply system. The on-off state of the switch on the incoming line can comprise an off state and a on state. When all switches on the same inlet wire are in a closed state, the inlet wire can be considered to be communicated.
The open/close state of the switch on the connection path between the electric power devices means the open/close state of the switch on the transmission line between the electric power devices having a connection relationship. The on-off state of the switch on the connection path also includes an off state and an on state. In one embodiment, the input ends of two main transformers (B1, B2) in the main substation are connected through 110kV high-voltage side buses (G1, G2), the output ends of two transformers (B1, B2) in the main substation are connected through 35kV low-voltage side buses (D1, D2), and the two main transformers (B1, B2) are connected with switches on the path, which may include bus tie switches K3 and K4 on the high-voltage side buses, bus tie switches K7 and K8 on the low-voltage side buses, and switches K5 and K6 on the transmission line of the main transformers (B1, B2) connected with the low-voltage side buses (D1, D2).
The terminal equipment can monitor the opening and closing state of the switch on each incoming line and the opening and closing state of the switch on the connection path among the power equipment through the power monitoring system. And further acquiring the switch opening and closing state data monitored by the power monitoring system when analyzing the operation state of the substation.
In step 330, the operation state of each power device in the first substation is determined according to the on-off state of the switch on the connection path between each power device in the first substation in the power supply system and the on-off state of the switch on the incoming line connected to the first substation.
Taking the urban rail transit power supply system as an example, the first substation may be a main substation in the urban rail transit power supply system. The first substation may also be another type of substation in a large grid system. As illustrated by the main substation, the power supply system may include a plurality of main substations, and the operation state of each power device in the first substation may be the operation state of each power device in the main substation, and the power devices in each main substation are analyzed one by one.
As shown in fig. 5, since the incoming lines (L1, L2) are connected to the high-voltage-side buses (G1, G2) of the first substation, the open/close state of the on-incoming-line switches (K1, K2) determines whether or not the first-substation high-voltage-side buses (G1, G2) connected to the incoming lines (L1, L2) are charged. Since the switch can be regarded as being connected when the switch is closed and can be regarded as not connected when the switch is opened, whether the power equipment in the first substation is connected with the high-voltage side bus and whether the power equipment in the first substation is connected with the low-voltage side bus can be obtained according to the opening and closing state of the switch on the connection path between the power equipment in the first substation in the power supply system.
If a certain power equipment is communicated with the high-voltage side buses (G1, G2) and is also communicated with the low-voltage side buses (D1, D2), and the high-voltage side buses (G1, G2) are electrified, the running state of the power equipment can be considered as normal running. Therefore, the operation state of each power device in the first substation can be judged one by one.
In step 340, the operating state of the first substation in the power supply system is obtained according to the operating state of each power device in the first substation.
As shown in fig. 5, the operation state of each power device may include two states of normal operation and stop operation. The operating state of the first substation differs depending on the operating state of each power device in the first substation. In an embodiment, the first substation may include a first transformer B1 and a second transformer B2, and if the first transformer B1 is operating, the second transformer B2 is operating, so that the operating state of the first substation is the first operating state; if the first transformer operates B1 and the second transformer B2 does not operate, the operation state of the first substation is obtained as a second operation state; if the first transformer B1 does not operate, the second transformer B2 operates, and the operation state of the first substation is a third operation state; if the first transformer B1 is not operated, the second transformer B2 is not operated, and the operation state of the first substation is the fourth operation state.
According to the technical scheme provided by the embodiment of the application, the operation state of each power device in the first substation is determined according to the opening and closing state of the switch on the connection path between the power devices in the first substation and the opening and closing state of the switch on the incoming line connected with the first substation, so that the operation state of the first substation is obtained.
As shown in fig. 6, which is a further description of step 330 in the flow steps of the analysis method of the power supply system, the method specifically includes:
in step 331, the live condition of the high-voltage side bus of the first substation is determined according to the open/close condition of the switch on the incoming line connected to the first substation.
The first substation can perform voltage reduction, the input end of the first substation is high voltage, and the output end of the first substation is low voltage (relative to high voltage). The high-voltage side bus of the first substation is a bus connected with a high-voltage input end of the first substation, and is relative to the low-voltage side bus.
As shown in fig. 5, when the incoming lines (L1, L2) are connected to the high-side bus bars (G1, G2) of the first substation, if the switch on one of the incoming lines is closed, it means that the incoming line is on. The first substation high-voltage side bus bar can comprise a first section bus bar G1 and a second section bus bar G2 which are connected through switches (K3, K4). The first section of bus bar G1 is connected with the first incoming line L1, and the second section of bus bar G2 is connected with the second incoming line L2. If the switches on the first incoming line L1 are all closed, the first high side bus G1 of the first substation can be considered live. At this time, even if the second incoming line L2 is not conductive, if the switches (K3, K4) between the first bus bar G1 and the second bus bar G2 are closed, the second bus bar G2 is charged.
In step 332, connectivity between each power device in the first substation and the high-voltage side bus of the first substation and the low-voltage side bus of the first substation is determined according to the open/close state of the switch on the connection path between each power device in the first substation.
For example, if there is a power transmission line between two power devices, the two power devices may be considered to be connected, but if the switch on the connection path is not closed, the two power devices may be considered to be connected but not connected. Therefore, a certain power equipment in the first substation can determine whether the power equipment is communicated with the high-voltage side bus of the first substation according to whether a switch on a connection path between the power equipment and the high-voltage side bus of the first substation is closed, and can determine whether the power equipment is communicated with the low-voltage side bus of the first substation according to whether the switch on the connection path between the power equipment and the low-voltage side bus of the first substation is closed.
In this embodiment, the sequence of step 331 and step 332 is not limited, that is, it may be determined whether the power equipment in the first substation is connected to the high-voltage side bus of the first substation or not, and whether the power equipment is connected to the low-voltage side bus of the first substation or not, and then it is determined whether the high-voltage side bus of the first substation is electrified or not. In an embodiment, it may be determined whether the first substation high-voltage side bus is electrified, and if neither of the two incoming lines connected to the first substation high-voltage side bus is electrified, it may be determined that the first substation high-voltage side is not electrified, and the operation state of the first substation is a stop operation.
In step 333, for each power device in the first substation, the operating status of each power device in the first substation is determined according to the connectivity of the power device to the high-voltage side bus of the first substation, the low-voltage side bus of the first substation, and the live status of the high-voltage side bus of the first substation.
In one embodiment, for each power device in the first substation, the power device is determined to be operating if the power device is respectively communicated with the first substation high-voltage side bus and the first substation low-voltage side bus, and the first substation high-voltage side bus is electrified. In one embodiment, for a main transformer in a main substation, if the main transformer is in communication with its high-side bus and also in communication with its low-side bus, and the high-side bus connecting the main transformer is live, the power equipment can be considered live. Conversely, if any of the above conditions is not satisfied, the power equipment may be considered to be out of operation.
According to the technical scheme provided by the above exemplary embodiment of the application, the operation state of the power equipment can be determined by judging the electrification condition of the high-voltage side bus and the connectivity of the power equipment with the high-voltage side bus and the low-voltage side bus, so that the operation state of the substation is more finely analyzed, and each power equipment in the substation is refined.
In one embodiment, the main substation is operated with the first main transformer B1 disconnected and the second main transformer B2 operating when one of the following conditions is met.
1) The section G2 of the 110kV high-voltage side bus is electrified, the section G1 of the 110kV high-voltage side bus is not communicated with the section D1 of the 35kV low-voltage side bus, and the section G2 of the 110kV high-voltage side bus is communicated with the section D2 of the 35kV low-voltage side bus;
2) the section G1 of the 110kV high-voltage side bus is electrified, the high-voltage side bus linkage switches K3 and K4 are closed, the section G1 of the 110kV high-voltage side bus is not communicated with the section D1 of the 35kV low-voltage side bus, and the section G2 of the 110kV high-voltage side bus is communicated with the section D2 of the 35kV low-voltage side bus;
3) the section G1 of the 110kV high-voltage side bus is uncharged, the section G2 of the 110kV high-voltage side bus is charged, the high-voltage side bus-coupled switches K3 and K4 are disconnected, the section G1 of the 110kV high-voltage side bus is communicated with the section D1 of the 35kV low-voltage side bus, and the section G2 of the 110kV high-voltage side bus is communicated with the section D2 of the 35kV low-voltage side bus;
similarly, the first main transformer and the second main transformer can be disconnected in other operation states of the main substation; the first main transformer operates and the second main transformer is disconnected; the first main transformer operates and the second main transformer operates.
In an embodiment, as shown in fig. 7, after the step 340, the method provided by the present application further includes:
step 350: and if the undetached first substation exists according to the operation state of each first substation in the power supply system, obtaining the operation state of the second substation in the power supply system according to the connectivity between the undetached first substation and the second substation in the power supply system.
The disconnection means that the first substation exits the grid-connected operation with the power grid, namely that the operation state of the first substation is Exit operation (Exit). In an embodiment, the operation states of the two transformers in the main substation are both Exit, and the operation state of the first substation can be considered as Exit. The undetached first substation means a first substation whose operating state is not Exit.
The second substation is a substation connected to the low-voltage bus of the first substation, and may be a step-up or step-down substation. In one embodiment, the first substation may be a main substation, and the second substation may be a traction substation or a step-down substation.
In an embodiment, the terminal device adopts a hierarchical search mode, after the operation state of each main substation in the power supply system is judged, whether an undetached main substation exists is judged according to the operation state of each main substation in the power supply system, and if all the main substations are in disconnection, the analysis is finished. And if the undetached main substation exists, continuously judging whether the traction substation or the step-down substation is communicated with the undetached main substation. If the traction substation or the step-down substation is communicated with the main substation, the traction substation or the step-down substation can be considered to operate.
According to the technical scheme provided by the embodiment of the application, the operation state of the first substation is judged firstly in a layered and graded searching mode, and when the undetached first substations exist, the operation state of the second substation connected with the first substation is continuously judged, so that the problem that analysis time is wasted because analysis of the second substation is still performed when all the first substations are undetached is avoided.
In one embodiment, as shown in FIG. 8, the step 350 may include the following steps.
In step 351, it is determined whether the high-voltage bus of the second substation is connected to the low-voltage bus of the undetached first substation or to the high-voltage bus of another live second substation according to the open/close state of the switch on the connection path between the power devices, and the live condition of the high-voltage bus of the second substation is determined.
In one embodiment, if the high-voltage side bus of the second substation is communicated with the low-voltage side bus of the first substation which is not disconnected or communicated with the high-voltage side bus of the other electrified second substation, the high-voltage side bus of the second substation is electrified.
The second live substation may include a live traction substation or a live step-down substation.
In one embodiment, when the first substation is a main substation and the second substation is a traction substation, if an undetached main substation exists, the low-voltage side bus of the undetached main substation is charged. Therefore, all traction substations can be traversed, the high-voltage side bus of the traction substation is used as a search starting point, whether a switch on a connecting path between the high-voltage side bus of the traction substation and the low-voltage side bus of the undetached main substation is closed or not can be judged according to the opening and closing state of the switch on each power equipment connecting path, and whether the high-voltage side bus of the traction substation is communicated with the low-voltage side bus of the undetached main substation or not is determined.
If the high-voltage side bus of the traction substation is communicated with the high-voltage side bus of other electrified traction substations or electrified step-down substations, the high-voltage side bus of the traction substation can be considered to be electrified, and the electrified condition of the high-voltage side bus of the second substation can be obtained through the mode.
In step 352, the operating status of each power device in the second substation is determined based on the connectivity of the power device in the second substation to the high-side bus of the second substation, the low-side bus of the second substation, and the live status of the high-side bus of the second substation.
In an embodiment, for each power device within the second substation, if the power device is in communication with the high-side bus of the second substation, the low-side bus of the second substation, respectively, and the high-side bus of the second substation is live, it may be determined that the power device is in an operational state. Whether the power equipment is communicated with the high-voltage side bus and the low-voltage side bus of the second substation can be determined by judging the opening and closing state of the switch on the connecting path.
On the contrary, if the high-voltage side bus of the second substation is not charged or the power equipment is not connected to the high-voltage side bus or the low-voltage side bus of the second substation, it may be considered that the power equipment is in a stop operation state, and thus, an operation state of each power equipment in the second substation may be obtained.
In step 353, the operation state of the second substation is obtained according to the operation state of each power equipment in the second substation.
Similar to the first substation, the operation states of the second substation also include a plurality of types, and different operation states of the second substation can be obtained according to different operation state combinations of each power device in the second substation.
According to the technical scheme provided by the embodiment of the application, the running state of each power device in the second substation can be determined by judging the live condition of the high-voltage side bus of the second substation and the connectivity of each power device in the second substation with the high-voltage side bus and the low-voltage side bus, so that the running state of the second substation can be obtained, the running state of the second substation can be analyzed more carefully and more accurately, and the running condition of each power device in the substation can be known.
In an embodiment, the second substation in the above embodiments may include a traction substation or a step-down substation; the traction substation can comprise at least two sets of rectifier unit equipment; the step-down substation may comprise at least two sets of distribution transformers; the step 340 includes:
and outputting the operation state of the second substation corresponding to the number of the electrified power equipment according to the number of the electrified power equipment in the second substation.
The live power equipment is power equipment that is operating in the second substation. In an embodiment, if the second substation is a traction substation and both sets of rectifier unit devices in a certain traction substation operate, the operation state of the traction substation may be normal operation. If only one set of rectifier unit equipment in a certain traction substation is in operation, the operation state of the traction substation is single-machine operation. And if the two sets of rectifier unit equipment in a certain traction substation do not operate, the operation state of the traction substation is the stop operation. Similarly, if the second substation is a step-down substation, the operation state of the step-down substation may be normal operation, stop operation, or single-machine operation according to the number of distribution transformers operating in the step-down substation.
Fig. 9 is a schematic diagram of a connection relationship of a traction substation (also called a traction step-down substation). T1 and T2 represent two sets of rectifier assemblies of the traction substation, and ST1 and ST2 represent two sets of distribution transformers. For a traction substation, a boolean variable m _ bsi connection may be defined to represent whether a high-voltage side bus of the traction substation is electrified, traverse all traction substations, use the high-voltage side bus of the traction substation as a search starting point (such as a 35kV bus in fig. 9), determine, by using a recursive search method, whether the bus is connected with a low-voltage side bus of an undetached main substation or a high-voltage side bus of an electrified traction substation or a step-down substation, if not, determine that the bus is an isolated island, if connected, determine whether a switch on a connection path is disconnected, if not, then m _ bsi connection is true, represent that the high-voltage side bus of the traction substation is electrified, otherwise, represent that the high-voltage side bus of the traction substation is uncharged.
When m _ bsistconnection is true, m _ bTracPower1 and m _ bTracPower2 are defined to represent the electrified conditions of two sets of rectifier unit equipment in the substation, if both m _ bTracPower1 and m _ bTracPower2 are true (namely electrified), the operating state of the traction substation is judged to be NORMAL (namely NORMAL operation), if only one of m _ bTracPower1 and m _ bTracPower2 is true, the operating state of the traction substation is judged to be singler (namely single-machine operation), and if both m _ bTracPower1 and m _ bTracPower2 are false, the operating state of the traction substation is judged to be QUIT binary POWER supply (large BILATERAL POWER supply after disconnection).
The BA line I loop, BC line I loop, BA line II loop and BC line II loop of fig. 9 may be sequentially connected to the AB line I loop, AC line I loop, AB line II loop and AC line II loop of fig. 5 in a one-to-one correspondence.
Fig. 10 is a schematic diagram of the connection relationship of the step-down substation. For the step-down substation, a boolean variable m _ bsi connecting may be defined to characterize whether a high-voltage side bus of the step-down substation is charged (i.e., 35kv bus in fig. 10), and an analysis method of the step-down substation is the same as that of the traction substation. When m _ bsi connection is false (indicating that the high-voltage side bus of the step-down transformer substation is not charged), the operation state of the step-down transformer substation is determined to be QUIT. When m _ bIsConnecting is true (indicating that a high-voltage side bus of the step-down substation is electrified), m _ bStePower1 and m _ bStePower2 are defined to represent whether two sets of distribution transformers of the step-down substation are electrified or not, namely whether a first-section step-down substation 35kV bus is communicated with a first-section 0.4kV bus or not and whether a second-section 35kV bus is communicated with a second-section 0.4kV bus or not. If m _ bstempower 1 and m _ bstempower 2 are both true (i.e., connected), the operation state of the step-down substation is determined as NORMAL (i.e., NORMAL operation), if only one of m _ bstempower 1 and m _ bstempower 2 is true, the operation state of the step-down substation is determined as SINGLERUN (i.e., stand-alone operation), and if both m _ bstempower 1 and m _ bstempower 2 are false (disconnected), the operation state of the step-down substation is determined as QUIT (i.e., stop operation).
The CA line I loop, the CB line I loop, the CA line II loop, and the CB line II loop of fig. 10 may be sequentially connected to the AB line I loop, the AC line I loop, the AB line II loop, and the AC line II loop of fig. 5 in a one-to-one correspondence.
The following is an embodiment of an apparatus of the present application, which can be used to execute an embodiment of an analysis method of a power supply system executed by the terminal device of the present application. For details not disclosed in the embodiments of the apparatus of the present application, please refer to the embodiments of the analysis method of the power supply system of the present application.
Fig. 11 is a block diagram of an analysis device of a power supply system according to an embodiment. As shown in fig. 11, the analysis device of the power supply system may include:
a connection relation obtaining module 1110, configured to analyze a model file corresponding to the power supply system to obtain a connection relation between each power device in the power supply system;
the switch state acquisition module 1120 is configured to traverse each incoming line of the power supply system, and acquire an open-close state of a switch on each incoming line and an open-close state of a switch on a connection path between each piece of power equipment;
the device state determining module 1130 is configured to determine an operating state of each power device in the first substation according to an open/close state of a switch on a connection path between each power device in the first substation in the power supply system and an open/close state of a switch on an incoming line connected to the first substation;
the operation state analysis module 1140 is configured to obtain an operation state of the first substation in the power supply system according to the operation state of each power device in the first substation.
The implementation process of the functions and actions of each module in the above device is specifically detailed in the implementation process of the corresponding step in the analysis method of the above power supply system, and is not described herein again.
The present application provides an electronic device, which can be used as a terminal device in the foregoing embodiments to execute an analysis method of a power supply system. The electronic device includes: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to execute the analysis side of the power supply system of the above embodiment.
In the embodiments provided in the present application, the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Claims (9)
1. A method of analyzing a power supply system, the method comprising:
analyzing a model file corresponding to a power supply system to obtain a connection relation between each piece of power equipment in the power supply system;
traversing each incoming line of the power supply system, and acquiring the opening and closing state of a switch on each incoming line and the opening and closing state of a switch on a connecting path between each two pieces of power equipment;
determining the running state of each power device in a first substation according to the switching state of a switch on a connection path between each power device in the first substation in the power supply system and the switching state of a switch on an inlet wire connected with the first substation;
obtaining the operating state of a first power substation in the power supply system according to the operating state of each power device in the first power substation;
the determining the operation state of each power device in a first substation according to the on-off state of a switch on a connection path between each power device in the first substation in the power supply system and the on-off state of a switch on an incoming line connected with the first substation includes:
determining the electrified condition of a high-voltage side bus of the first substation according to the opening and closing condition of a switch on the inlet wire connected with the first substation;
according to the opening and closing state of a switch on a connection path between each power device in the first substation, determining the connectivity between each power device in the first substation and a high-voltage side bus of the first substation and the connectivity between each power device in the first substation and a low-voltage side bus of the first substation;
and aiming at each power device in the first substation, determining the running state of each power device in the first substation according to the connectivity of each power device with the high-voltage side bus of the first substation, the low-voltage side bus of the first substation and the electrification condition of the high-voltage side bus of the first substation.
2. The method of claim 1, wherein determining, for each power device in the first power substation, an operational state of each power device in the first power substation based on connectivity of the power device to the first power substation high-side bus, the first power substation low-side bus, and a live condition of the first power substation high-side bus comprises:
for each power device in the first substation, if the power device is respectively communicated with the first substation high-voltage side bus and the first substation low-voltage side bus, and the first substation high-voltage side bus is electrified, determining that the power device operates.
3. The method of claim 1, wherein the first substation includes a first transformer and a second transformer, and the obtaining the operating state of the first substation in the power supply system according to the operating state of each power device in the first substation comprises:
if the first transformer operates, the second transformer operates, and the operating state of the first substation is obtained as a first operating state;
if the first transformer is operated and the second transformer is not operated, the operation state of the first substation is a second operation state;
if the first transformer does not operate, the second transformer operates to obtain that the operating state of the first substation is a third operating state;
and if the first transformer does not operate, the second transformer does not operate, and the operation state of the first substation is a fourth operation state.
4. The method of claim 1, wherein after obtaining the operating status of the first substation in the power supply system according to the operating status of each power device in the first substation, the method further comprises:
and if the undetached first substation exists according to the operation state of each first substation in the power supply system, obtaining the operation state of a second substation in the power supply system according to the connectivity between the undetached first substation and the second substation in the power supply system.
5. The method of claim 4, wherein obtaining the operating state of the second substation in the power supply system based on the connectivity of the undeployed first substation to the second substation in the power supply system comprises:
judging whether a high-voltage side bus of the second substation is communicated with a low-voltage side bus of the undetached first substation or is communicated with high-voltage side buses of other electrified second substations according to the opening and closing states of switches on connecting paths among the power equipment, and determining the electrified condition of the high-voltage side bus of the second substation;
determining the operating state of each power device in the second substation according to the connectivity of the power device in the second substation with the high-voltage side bus of the second substation, the connectivity of the low-voltage side bus of the second substation and the electrification condition of the high-voltage side bus of the second substation;
and obtaining the operating state of the second substation according to the operating state of each power device in the second substation.
6. The method of claim 5, wherein determining whether the high-side bus of the second substation is in communication with the low-side bus of the unlaced first substation or with the high-side bus of another live second substation to determine the live condition of the high-side bus of the second substation comprises:
and if the high-voltage side bus of the second substation is communicated with the low-voltage side bus of the undetached first substation or communicated with the high-voltage side buses of other electrified second substations, determining that the high-voltage side bus of the second substation is electrified.
7. The method of claim 5, wherein the second substation comprises a traction substation or a step-down substation; the traction substation comprises at least two sets of rectifier unit equipment; the step-down substation comprises at least two sets of distribution transformers; the obtaining of the operating state of the second substation according to the operating state of each power device in the second substation includes:
and outputting the running state of the second substation corresponding to the number of the electrified power equipment according to the number of the electrified power equipment in the second substation.
8. An analysis device for a power supply system, the device comprising:
the connection relation obtaining module is used for analyzing the model file corresponding to the power supply system to obtain the connection relation between each piece of power equipment in the power supply system;
the switch state acquisition module is used for traversing each incoming line of the power supply system and acquiring the opening and closing state of a switch on each incoming line and the opening and closing state of a switch on a connecting path between each piece of power equipment;
the equipment state determining module is used for determining the running state of each electric equipment in a first substation according to the switching state of a switch on a connection path between each electric equipment in the first substation in the power supply system and the switching state of a switch on an incoming line connected with the first substation;
the running state analysis module is used for obtaining the running state of the first substation in the power supply system according to the running state of each power device in the first substation;
the determining the operation state of each power device in a first substation according to the on-off state of a switch on a connection path between each power device in the first substation in the power supply system and the on-off state of a switch on an incoming line connected with the first substation includes:
determining the electrified condition of a high-voltage side bus of the first substation according to the opening and closing condition of a switch on the inlet wire connected with the first substation;
according to the opening and closing state of a switch on a connection path between each power device in the first substation, determining the connectivity between each power device in the first substation and a high-voltage side bus of the first substation and the connectivity between each power device in the first substation and a low-voltage side bus of the first substation;
and aiming at each power device in the first substation, determining the running state of each power device in the first substation according to the connectivity of each power device with the high-voltage side bus of the first substation, the low-voltage side bus of the first substation and the electrification condition of the high-voltage side bus of the first substation.
9. An electronic device, characterized in that the electronic device comprises:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to perform the analysis method of the power supply system according to any one of claims 1 to 7.
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