10kV power grid feeder line fault processing physical simulation device
By designing a physical simulation device for fault handling of 10kV grid feeder and simulating the fault form of the 10kV distribution network, the problem that existing intelligent control devices cannot effectively simulate faults is solved, and the real simulation of faults and the reliability of intelligent control is improved.
Patent Information
- Application Number
- CN202322902178.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-10-28
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2033-10-28
AI Technical Summary
The existing intelligent control devices cannot fully and practically simulate the fault form of the 10kV distribution network, resulting in unreliable performance and cannot effectively reduce the fault power outage time and range.
Design a physical simulation device for fault handling of 10kV grid feeder, and simulates the fault of the 10kV distribution network through simulation units, including a low-voltage three-phase 380V boosted to three-phase 10kV boost transformer and a 10kV three-phase five-column transformer to simulate various Form of failure, and data acquisition and analysis are carried out through intelligent controllers and servers.
Real simulation of 10kV distribution network faults is realized, the applicability and reliability of the intelligent controller is improved, the isolation fault segment can be accurately judged, the fault outage time and range can be reduced, and the reliability of the distribution network is improved.
Smart Images
Figure CN222440083U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of 10kV power supply of a power distribution system, in particular to a 10kV power grid feeder fault processing physical simulation device. Background Art
[0002] With the continuous development of the national economy, the electricity consumption is increasing, which puts forward higher requirements on the reliability of power supply of the power system and the accuracy and timeliness of fault handling when various faults occur. Various intelligent controllers based on computer software simulation systems have emerged in the market. However, the actual operation of 10kV overhead lines is very different from computer software simulation. This device provides an actual 10kV overhead line and can actually perform physical simulation of various faults on the two most representative 10kV hand-in-hand feeder lines; at present, the average annual power outage time of my country's 10kV distribution network is much lower than that of economically developed countries such as Europe, America, Japan, and South Korea. The reliability of power supply needs to be improved urgently. The long annual power outage time is mainly due to the fact that when a fault occurs in the 10kV distribution network, it takes too long to find the fault. At present, the State Grid is stepping up its efforts to use intelligent control devices on the 10KV distribution network to reduce the time and scope of fault power outages.
[0003] However, the current situation of intelligent devices used on site is not satisfactory. The reason is that the intelligent devices designed based on computer simulation systems cannot completely and realistically simulate various fault modes of 10kV distribution networks, resulting in unreliable performance of intelligent control devices.
[0004] To this end, we propose a 10kV power grid feeder fault processing physical simulation device to solve the above problems. Utility Model Content
[0005] The utility model aims to provide a 10kV power grid feeder fault processing physical simulation device to solve the problems raised in the above background technology.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a 10kV power grid feeder fault processing physical simulation device, including a simulation unit, a low-voltage three-phase 380V booster transformer and a 10kV three-phase five-column transformer in the simulation unit, two low-voltage three-phase 380V booster transformers are provided for boosting the three-phase 10kV, namely, main transformer No. 1 and main transformer No. 2, the three-phase incoming line terminals of the main transformer No. 1 and the main transformer No. 2 are connected to the three input lines A, B, and C through a low-voltage molded case main switch, and the three-phase 10kV high-voltage outgoing line terminal of the main transformer No. 1 is respectively connected to the incoming line terminal of the 10kV high-voltage switch RC1 and the three-phase incoming line terminal of the 10kV three-phase five-column transformer. The No. 1 main transformer is connected to the inlet terminal of the 10kV high-voltage switch RC1, and a ground capacitor C9 for simulating the 10kV line on the power supply side of the No. 1 main transformer is connected. The outlet terminal of the 10kV three-phase five-column transformer is respectively connected to the static contacts of the high-voltage contactor JL and the high-voltage contactor JR. The moving contact of the high-voltage contactor JL is connected to the power inductor L with multiple taps, and the moving contact of the high-voltage contactor JR is connected to the grounding resistor R of the 10kV simulated small and medium resistance grounding. The outlet terminal of the 10kV high-voltage switch RC1 is connected to the inlet terminal of the 10kV high-voltage switch F1, and the outlet terminal of the 10kV high-voltage switch F1 is connected to the inlet terminal of the 10kV high-voltage switch F2;
[0007] The three-phase 10kV high-voltage outlet of the No. 2 main transformer is connected to the 10kV high-voltage switch RC2, the No. 2 main transformer and the 10kV high-voltage outlet are connected to the incoming line of the high-voltage switch RC2, and a ground capacitor C12 for simulating the 10kV line on the power supply side of the No. 1 main transformer is connected between the No. 2 main transformer and the RC2 circuit, the outlet of the 10kV high-voltage switch RC1 is connected to the incoming line of the 10kV high-voltage switch F3, the outlet of the 10kV high-voltage switch F3 is connected to the incoming line of the 10kV high-voltage switch F4, a 10kV high-voltage switch D1 is connected between the 10kV high-voltage switch F3 and the 10kV high-voltage switch F4, the outlet of the 10kV high-voltage switch F4 and the outlet of the 10kV high-voltage switch F2 are respectively connected to the incoming and outgoing lines of the handle switch L1;
[0008] The output end of the simulation unit is connected to the server, and the server includes a status recording unit for recording the electrical data status in the simulation unit; a change comparison unit is set in conjunction with the status recording unit to compare the electrical data status in the simulation unit before and after; a restoration operation unit is set in conjunction with the change comparison unit to restore the change operation in the simulation unit.
[0009] As an optional solution of the 10kV power grid feeder fault processing physical simulation device described in the utility model, wherein: the 10kV high-voltage switch F1, 10kV high-voltage switch F2, 10kV high-voltage switch F3, 10kV high-voltage switch F4, 10kV high-voltage switch RC1, 10kV high-voltage switch RC2 and 10kV high-voltage switch D1 are all configured with an intelligent controller of the VTIC solution.
[0010] As an optional solution of the 10kV power grid feeder fault processing physical simulation device of the utility model, a 10kV high-voltage switch is provided between the end of the No. 1 main transformer power supply line and the end of the No. 2 main transformer power supply line as an automatic connecting switch.
[0011] As an optional scheme of the 10kV power grid feeder fault processing physical simulation device described in the utility model, wherein: a simulated mobile No. 1 trolley composed of a three-phase 10kV resistor group and a capacitor group is provided on the 10kV line on the power supply side of the No. 1 main transformer, the 10kV high-voltage switch RC1 load side, the 10kV high-voltage switch F1, the 10kV high-voltage switch F2 and the handle switch L1; a simulated mobile No. 2 trolley composed of a three-phase 10kV resistor group and a capacitor group is provided on the 10kV line on the load side of the 10kV high-voltage switch RC2, the 10kV high-voltage switch F3, the 10kV high-voltage switch F4 and the handle switch L1.
[0012] As an optional solution of the 10kV power grid feeder fault processing physical simulation device described in the utility model, the power inductor L, the ground capacitor C9 and the ground capacitor C12, the common end of the capacitor group of car No. 1, and the common end of the capacitor group of car No. 2 are all provided with grounding wires.
[0013] As an optional solution of the 10kV power grid feeder fault processing physical simulation device of the utility model, wherein: the state recording unit includes a recording annotation unit.
[0014] Compared with the prior art, the utility model has the following beneficial effects:
[0015] 1. The 10kV power grid feeder fault processing physical simulation device can simulate the faults and processing methods of the 10kV distribution network under any neutral point operation mode, so that the intelligent controller is suitable for various 10kV distribution network operation environments; it can also provide physical simulation operation environments in hand-in-hand and radioactive modes; through two groups of 10kV power capacitors and simulated mobile carts, it can actually simulate and analyze the dynamic changes of fault parameters when various faults occur in any line section of the 10kV distribution network; through various operation modes of the system, simulate and analyze the transient and steady-state changes of fault electrical parameters under various fault conditions, so as to improve the reliability of the 10kV distribution network and accurately determine and isolate the fault section;
[0016] 2. The 10kV power grid feeder fault handling physical simulation device records the operating status, electrical status and comparison information in real time, which is used for staff to learn and master work skills so that subsequent work can quickly and efficiently handle faults. A recovery operation unit is set up to restore the changed operations in the simulation unit, which is used to correct erroneous operations in time and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the structural unit of the utility model. DETAILED DESCRIPTION
[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0019] See also Figure 1 The utility model provides a technical solution: including a simulation unit, a low-voltage three-phase 380V step-up transformer and a 10kV three-phase five-column transformer in the simulation unit, two low-voltage three-phase 380V step-up transformers are provided for stepping up the three-phase 10kV, namely, main transformer No. 1 and main transformer No. 2, the three-phase incoming line terminals of main transformer No. 1 and main transformer No. 2 are connected to the three input lines A, B, and C through a low-voltage molded case main switch, and the three-phase 10kV high-voltage outgoing line terminal of main transformer No. 1 is respectively connected to the incoming line terminal of the 10kV high-voltage switch RC1 and the three-phase incoming line terminal of the 10kV three-phase five-column transformer, and main transformer No. 1 is connected to the 10kV high-voltage switch RC1. The incoming terminal of the 10kV high-voltage switch RC1 is connected with the ground capacitor C9 for simulating the 10kV line on the power supply side of the No. 1 main transformer. The outgoing terminal of the 10kV three-phase five-column transformer is respectively connected with the static contacts of the high-voltage contactor JL and the high-voltage contactor JR. The moving contact of the high-voltage contactor JL is connected with the power inductor L with multiple taps. The moving contact of the high-voltage contactor JR is connected with the grounding resistor R for simulating 10kV small and medium resistance grounding. The outgoing terminal of the 10kV high-voltage switch RC1 is connected with the incoming terminal of the 10kV high-voltage switch F1. The outgoing terminal of the 10kV high-voltage switch F1 is connected with the incoming terminal of the 10kV high-voltage switch F2.
[0020] The three-phase 10kV high-voltage outlet of the No. 2 main transformer is connected to the 10kV high-voltage switch RC2, and the No. 2 main transformer and the 10kV high-voltage outlet are connected to the incoming line of the high-voltage switch RC2. A capacitor C12 for simulating the 10kV line on the power supply side of the No. 1 main transformer is connected between the No. 2 main transformer and the RC2 circuit. The outlet of the 10kV high-voltage switch RC1 is connected to the incoming line of the 10kV high-voltage switch F3, and the outlet of the 10kV high-voltage switch F3 is connected to the 10kV high-voltage switch F3. The inlet end of the 10kV high-voltage switch F4 is connected to the inlet end of the 10kV high-voltage switch F4, a 10kV high-voltage switch D1 is connected between the 10kV high-voltage switch F3 and the 10kV high-voltage switch F4, the 10kV high-voltage switch F1, the 10kV high-voltage switch F2, the 10kV high-voltage switch F3, the 10kV high-voltage switch F4, the 10kV high-voltage switch RC1, the 10kV high-voltage switch RC2 and the 10kV high-voltage switch D1 are all equipped with intelligent controllers of the VTIC solution, the outlet end of the 10kV high-voltage switch F4 and the outlet end of the 10kV high-voltage switch F2 are respectively connected to the inlet and outlet ends of the handle switch L1, a 10kV high-voltage switch is provided as an automatic contact switch between the end of the No. 1 main transformer power supply line and the end of the No. 2 main transformer power supply line, and a three-phase 10kV resistor is provided on the 10kV line from the No. 1 main transformer, the load side of the 10kV high-voltage switch RC1, the 10kV high-voltage switch F1, the 10kV high-voltage switch F2 to the power supply side of the handle switch L1. A simulated mobile trolley No. 1 consisting of a three-phase 10kV resistor group and a capacitor group is installed on the 10kV line on the load side of the 10kV high-voltage switch RC2, the 10kV high-voltage switch F3, the 10kV high-voltage switch F4 and the load side of the handle switch L1. The power inductor L, the ground capacitor C9 and the ground capacitor C12, the common end of the capacitor group of trolley No. 1 and the common end of the capacitor group of trolley No. 2 are all equipped with grounding wires.
[0021] When simulating a system with an ungrounded neutral point, the No. 2 main transformer (stepped up from a low-voltage three-phase 380V to a three-phase 10kV step-up transformer) is activated, and the 10kV line-to-ground capacitance before the fault point is simulated through the C12 power capacitor bank. The load side grid load, 10kV line capacitance, short-circuit fault, overcurrent fault or various grounding faults (including various forms of medium-resistance, high-resistance grounding faults and arc grounding) after the fault point are simulated through the combined input of the No. 2 trolley. Since the eight high-voltage switches are equipped with intelligent controllers, they are connected to the server through the communication device of the controller, and various transient electrical, position and other components and steady-state electrical, position and other components when the fault occurs are sampled for analysis;
[0022] When simulating the neutral point grounding system through the arc suppression coil, the No. 1 main transformer (stepped up from low-voltage three-phase 380V to three-phase 10kV step-up transformer) is activated, and the 10kV line-to-ground capacitance before the fault point is simulated through the C9 power capacitor bank. The combined input of the No. 1 trolley simulates the grid load, 10kV line capacitance, short-circuit fault, overcurrent fault or various grounding faults (including various forms of medium-resistance, high-resistance grounding faults and arc grounding) after the fault point. While simulating the grounding fault, the arc suppression coil compensation system is simulated through the JL input power inductor. Since the eight high-voltage switches are equipped with intelligent controllers, they are connected to the server through the communication device of the controller, and various transient electrical, position and other components and steady-state electrical, position and other components when the fault occurs are sampled for analysis;
[0023] When simulating a neutral point grounding system with a low resistance, the No. 1 main transformer (stepped up from a low-voltage three-phase 380V to a three-phase 10kV step-up transformer) is activated, and the 10kV line-to-ground capacitance before the fault point is simulated through the C9 power capacitor bank. The combined input of the No. 1 trolley simulates the grid load, 10kV line capacitance, short-circuit fault, overcurrent fault or various grounding faults (including various forms of medium-resistance, high-resistance grounding faults and arc grounding) after the fault point. While simulating the grounding fault, a 60-ohm high-voltage resistor is input through JR to simulate low-resistance grounding. Since the eight high-voltage switches are equipped with intelligent controllers, they are connected to the server through the communication device of the controller, and various transient electrical, position and other components and steady-state electrical, position and other components when the fault occurs are sampled for analysis;
[0024] In the process of simulating various faults, the handle switch L1 is automatically put into operation, and the relevant intelligent controller automatically changes the operating parameter group before and after L1 is put into operation to adapt to the changes in various operating modes. The intelligent controller collects the changes in the respective logical quantities and the accuracy and reliability of the physical simulation system actions, and analyzes the various transient electrical, position and other components and steady-state electrical, position and other components when the fault occurs, modifies or corrects the original control program and logic functions in the controller, and accurately, quickly and reliably isolates the fault section, and restores the normal power supply of the non-fault section to the maximum extent, so as to achieve the purpose of improving the reliability of the 10kV distribution network.
[0025] As a further improvement of the present embodiment: the output end of the simulation unit is connected to the server, and the server includes a status recording unit for recording the electrical data status in the simulation unit; a change comparison unit is provided in conjunction with the status recording unit to compare the electrical data status in the simulation unit before and after, so as to enable the staff to learn and master work skills so that subsequent work can quickly and efficiently handle faults; a recovery operation unit is provided in conjunction with the change comparison unit to restore the change operation in the simulation unit, so as to promptly correct erroneous operations.
[0026] Furthermore, the state recording unit includes a recording annotation unit for recording operation annotations so as to understand the reasons for the operation later.
[0027] That is, it can record the operating status, electrical status and comparison information in real time, which is used for staff to learn and master work skills so that subsequent work can quickly and efficiently handle faults. A recovery operation unit is set up to restore the changed operations in the simulation unit, which is used to correct erroneous operations in time, and is easy to use.
[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A 10kV power grid feeder fault processing physical simulation device, comprising a simulation unit, a low voltage three-phase 380V booster in the simulation unit to a three-phase 10kV booster transformer and a 10kV three-phase five-column transformer, characterized in that: There are two low-voltage three-phase 380V step-up transformers for three-phase 10kV step-up transformers, namely No. 1 main transformer and No. 2 main transformer. The three-phase incoming line terminals of No. 1 main transformer and No. 2 main transformer are connected to the three input lines A, B, and C through low-voltage molded case main switches, and the three-phase 10kV high-voltage outgoing line terminals of No. 1 main transformer are respectively connected to the incoming line terminals of the 10kV high-voltage switch RC1 and the three-phase incoming line terminals of the 10kV three-phase five-column transformer. A 10kV line for simulating the 10kV line of the power supply side of No. 1 main transformer is connected between the incoming line terminals of the 10kV high-voltage switch RC1. The ground capacitor C9 of the circuit, the outlet terminals of the 10kV three-phase five-column transformer are respectively connected to the static contacts of the high-voltage contactor JL and the high-voltage contactor JR, the moving contact of the high-voltage contactor JL is connected to the power inductor L with multiple taps, the moving contact of the high-voltage contactor JR is connected to the grounding resistor R of the 10kV simulated small and medium resistance grounding, the outlet terminal of the 10kV high-voltage switch RC1 is connected to the incoming terminal of the 10kV high-voltage switch F1, and the outlet terminal of the 10kV high-voltage switch F1 is connected to the incoming terminal of the 10kV high-voltage switch F2; The three-phase 10kV high-voltage outlet of the No. 2 main transformer is connected to the 10kV high-voltage switch RC2, the No. 2 main transformer and the 10kV high-voltage outlet are connected to the incoming line of the high-voltage switch RC2, and a ground capacitor C12 for simulating the 10kV line on the power supply side of the No. 1 main transformer is connected between the No. 2 main transformer and the RC2 circuit, the outlet of the 10kV high-voltage switch RC1 is connected to the incoming line of the 10kV high-voltage switch F3, the outlet of the 10kV high-voltage switch F3 is connected to the incoming line of the 10kV high-voltage switch F4, a 10kV high-voltage switch D1 is connected between the 10kV high-voltage switch F3 and the 10kV high-voltage switch F4, the outlet of the 10kV high-voltage switch F4 and the outlet of the 10kV high-voltage switch F2 are respectively connected to the incoming and outgoing lines of the handle switch L1; The output end of the simulation unit is connected to the server, and the server includes a status recording unit for recording the electrical data status in the simulation unit; A change comparison unit is provided in conjunction with the state recording unit to compare the electrical data states in the simulation unit before and after; A restoration operation unit is provided in conjunction with the change comparison unit to restore the change operation in the simulation unit; The state recording unit includes a recording annotation unit.
2. A 10kV power grid feeder fault processing physical simulation device according to claim 1, characterized in that: The 10kV high-voltage switch F1, 10kV high-voltage switch F2, 10kV high-voltage switch F3, 10kV high-voltage switch F4, 10kV high-voltage switch RC1, 10kV high-voltage switch RC2 and 10kV high-voltage switch D1 are all equipped with an intelligent controller of the VTIC solution.
3. A 10kV power grid feeder fault processing physical simulation device according to claim 1, characterized in that: A 10kV high-voltage switch is provided between the end of the No. 1 main transformer power supply line and the end of the No. 2 main transformer power supply line as an automatic contact switch.
4. A 10kV power grid feeder fault processing physical simulation device according to claim 1, characterized in that: A simulated mobile No. 1 trolley consisting of a three-phase 10kV resistor group and a capacitor group is provided on the 10kV line on the power supply side of the No. 1 main transformer, the load side of the 10kV high-voltage switch RC1, the 10kV high-voltage switch F1, the 10kV high-voltage switch F2 and the handle switch L1, and a simulated mobile No. 2 trolley consisting of a three-phase 10kV resistor group and a capacitor group is provided on the 10kV line on the load side of the 10kV high-voltage switch RC2, the 10kV high-voltage switch F3, the 10kV high-voltage switch F4 and the load side of the handle switch L1.
5. A 10kV power grid feeder fault processing physical simulation device according to claim 1, characterized in that: The power inductor L, the ground capacitor C9 and the ground capacitor C12, the common end of the capacitor group of car No. 1, and the common end of the capacitor group of car No. 2 are all provided with grounding wires.