Load testing device based on aging of high-power electronic switch module
By designing a load testing device, the load-carrying and heat dissipation capabilities of electronic switches are verified, solving the problem of the lack of testing methods in the existing technology, realizing efficient aging testing of electronic switches, and reducing costs and floor space.
Patent Information
- Application Number
- CN202422638779.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-10-31
AI Technical Summary
The lack of existing technology for load testing devices to verify the load-carrying capacity and heat dissipation capacity of electronic switches leads to frequent voltage dips in the power grid, causing economic losses and safety hazards.
A load testing device based on a high-power electronic switch module was designed, including a main power supply, a three-phase voltage regulator, an incoming line switch, a three-phase isolation transformer, an electronic switch, an air switch, and a resistive load. By adjusting the transformer turns ratio and controlling the air switch, the power grid conditions are simulated to test the load-carrying and heat dissipation capabilities of the electronic switch.
It enables the verification of the effective load-carrying capacity and heat dissipation capacity of electronic switches, reduces the number of resistive loads and floor space, lowers costs, and is suitable for aging tests of electronic switch modules with power ratings of 400KVA and below.
Smart Images
Figure CN223526446U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a load testing device, in particular to a load testing device based on high -power electronic switch module ageing. BACKGROUND
[0002] Due to power quality accidents, the world loses several hundred billion dollars every year, about 80% of which is caused by power supply voltage sag or short-time power failure. When the power grid appears "flicker" or short-time power failure, it will cause motor speed drop or stop, frequency converter shutdown, AC contactor disconnection, lighting disappearance in large public places, switch power failure, equipment damage and other accidents. Due to the occurrence of the above accidents, it will lead to production fluctuation, operation confusion, personnel panic. Light causes product quality accident, causes tens of thousands, several million or even million economic losses, heavy even causes major safety accidents, brings huge economic losses and bad social influence to enterprise and society.
[0003] At present, the products for solving power grid voltage sag at home and abroad mainly concentrate on low-voltage AC 208V-480V side, and there are few medium-voltage 10kV products. Whether it is a low-voltage product or a medium-voltage product, the key component in the equipment is a fast switch, and the fast switch generally selects an electronic type, that is, we simply call it "electronic switch". The electronic switch uses thyristor as an on / off device, when the power grid is normal, the power grid directly supplies power to the load through the electronic switch, so the load capacity and heat dissipation capacity of the electronic switch are crucial. At present, there is no load testing device for verifying the load capacity and heat dissipation capacity of the electronic switch, so it is urgent to design an adjustable resistive load testing device for verifying the load capacity and heat dissipation capacity of the electronic switch. CONTENT OF UTILITY MODEL
[0004] The utility model solves the technical problem that the prior art lacks, and provides a load testing device based on high-power electronic switch module ageing, which can verify the load capacity and heat dissipation capacity of the electronic switch.
[0005] The utility model adopts the technical scheme: the utility model discloses a main power supply, three -phase voltage regulator TR1, incoming line switch K1, three -phase isolation transformer TR2, electronic switch FS, air switch KA1~KA10, resistive load R1~R30, three -phase voltage regulator TR1 input and power grid main power supply are connected, and the incoming line end of incoming line switch K1 is connected with the output end of three -phase voltage regulator TR1, and the outgoing line end of incoming line switch K1 is connected with the primary side of three -phase isolation transformer TR2, and the output end secondary side of isolation transformer TR2 is connected with the input end of electronic switch FS, and the output end of electronic switch FS is connected with the input end of load side air switch KA1~KA10, and the output end of load side air switch KA1~KA10 is connected with resistive load R1~R30 through the mode of series and parallel.
[0006] Further, the power of the three -phase isolation transformer TR2 is 15KVA, and the transformation ratio is 380V / 17.3V, the primary side input line voltage of the three -phase isolation transformer TR2 is 380V, and the secondary side output line voltage of the three -phase isolation transformer TR2 is 17.3V.
[0007] Further, the electronic switch FS uses thyristor as on / off device, and the conduction or turn-off of the thyristor is controlled through program.
[0008] Further, the input and output terminals of the electronic switch FS all use pluggable connectors.
[0009] Further, the air switch KA1~KA10 uses three -pole 100A micro -circuit breaker to control load input or exit, and closes or opens the air switch according to the current needs.
[0010] Further, the resistive load R1~R30 is three -section iron chromium aluminum resistance, and the three -section iron chromium aluminum resistance is respectively connected in series on the three output ends of the load side air switch KA1~KA10.
[0011] Further, the specification of single -section iron chromium aluminum resistance is 0.16R / 62.5A.
[0012] Further, the mutual inductor TA1~TA3 is arranged between the three -phase isolation transformer TR2 and the electronic switch FS.
[0013] Further, the load testing device based on the aging of high -power electronic switch module further includes cabinet 1, and the three -phase voltage regulator TR1 is located at the cabinet 1.
[0014] Further, the cabinet 1 is provided with a plurality of AC fans for the heat dissipation of the resistive load R1~R30. DRAWINGS
[0015] Figure 1 is a principle block diagram of the utility model;
[0016] Figure 2 is a structure diagram of the utility model. DETAILED DESCRIPTION
[0017] As Figure 1 and Figure 2 shown, in the embodiment, the utility model includes mains, three-phase voltage regulator TR1, incoming line switch K1, three-phase isolation transformer TR2, electronic switch FS, air switch KA1~KA10, resistive load R1~R30;The three-phase voltage regulator TR1 input end is connected with mains, the incoming line switch K1 incoming line end is connected with the output end of three-phase voltage regulator TR1, the incoming line switch K1 outgoing line end is connected with the primary side of three-phase isolation transformer TR2, the output end secondary side of isolation transformer TR2 is connected with the input end of electronic switch FS, the output end of electronic switch FS is connected with the input end of load side air switch KA1~KA10, the output end of load side air switch KA1~KA10 is connected with resistive load R1~R30 through series and parallel connection.
[0018] In the embodiment, three-phase isolation transformer TR2 power is 15KVA, and the transformation ratio is 380V / 17.3V, and the purpose of designing this transformation ratio is to let the secondary side output voltage be low, and the resistance load of small resistance value can be taken, when being under the same power, the load current is very large, and it is convenient to age high-power electronic switch.According to calculation, the primary side current of isolation transformer of the device is 23A, in order to meet overload current protection, the incoming line switch K1 selects 63A air switch.The three-phase voltage regulator TR1 of external selection selects the power greater than 15KVA.
[0019] In the embodiment, electronic switch FS adopts thyristor as on / off device, and the conduction and turn-off of thyristor are controlled through program.The input and output terminals of this module all adopt pluggable connector, and the load device reserves two grades of electronic switch module positions, wherein 50~150KVA is a grade size, and 150KVA~400KVA is another grade size, and the power demand of the current customer field application is met.
[0020] In the embodiment, the air switch KA1~KA10 of three-phase load side selects 3-pole 100A, and the load current size can be adjusted by closing or opening the switch.
[0021] In the embodiment, the resistive load R1~R30 is an iron-chromium-aluminum resistor with high temperature resistance, long service life, high resistivity, good oxidation resistance and good sulfur resistance. The single-section resistor is selected as 0.16R / 62.5A. Considering that the heat generated in the device is large when full load, four AC fans are designed to blow against the resistor load to dissipate heat. The cable on the load side in the device is a high-temperature-resistant 500℃ wire to ensure that the cable does not catch fire even if the heat is high during long-term operation of the load.
[0022] In the embodiment, the load test device is designed with an AC voltmeter PV, ammeters PAa, PAb and PAc, and transformers TA1~TA3 to facilitate viewing of loop voltage and current. An upper power signal indicator lamp H1 is designed on the cabinet door.
[0023] In the load test device, the grid voltage is regulated by an external three-phase voltage regulator and then enters the AC air switch. When the load carrying capacity of the electronic switch needs to be verified, the incoming line switch K1 is closed first, and then the output of the incoming line switch K1 is connected to the primary side of the three-phase transformer. The transformer ratio is 380V / 17.3V. After transformation, the secondary side becomes low voltage 17.3V. This voltage is connected to the input end of the electronic switch FS. When the control electronic switch FS thyristor is turned on, the output is connected to the load side switch. The resistive load is connected by closing / opening the load side air switch KA1~KA10 for incoming line load test. The load test device is designed with an AC voltmeter, an ammeter and a transformer to facilitate viewing of loop voltage and current.
[0024] The device is an aging test device for electronic switch modules with a power of 400KVA and below. The three-phase load current in the test device is adjustable, and the maximum current can reach 625A, greatly meeting the current demand of conventional power temporary drop equipment aging. The electronic switch uses a plug-in connector, which does not need to be wired and is convenient for module replacement. The device is a single cabinet, and the overall machine occupies a small area, which is convenient for dragging back and forth.
[0025] The utility model discloses a load device for high-power electronic switch module aging, which is designed by adding a voltage regulator and adjusting the ratio of a three-phase isolation transformer. The device reduces the voltage to a low voltage through the isolation transformer and then configures a small resistance, which can achieve the load carrying capacity of large current. This can reduce the number of resistance loads, save costs, and reduce the floor area occupied by resistance loads. It is convenient and practical for aging high-power electronic switch modules.
[0026] Although the embodiments of the utility model are described in actual schemes, they do not constitute a limitation on the meaning of the utility model. It is obvious for those skilled in the art to modify the embodiments and combine them with other schemes according to the description.
Claims
1. Load testing device based on aging of high power electronic switch modules, characterized in that: The load test device based on the aging of the high-power electronic switch module comprises a main power supply, a three-phase voltage regulator (TR1), an incoming line switch (K1), a three-phase isolation transformer (TR2), an electronic switch (FS), air switches (KA1-KA10), and resistive loads (R1-R30); the three-phase voltage regulator (TR1) is connected with a power grid main power supply at an input end; an incoming line end of the incoming line switch (K1) is connected with an output end of the three-phase voltage regulator (TR1); an outgoing line end of the incoming line switch (K1) is connected with a primary side of the three-phase isolation transformer (TR2); an output end secondary side of the isolation transformer (TR2) is connected with an input end of the electronic switch (FS); an output end of the electronic switch (FS) is connected with an input end of the load-side air switch (KA1-KA10); and the output end of the load-side air switch (KA1-KA10) is connected with the resistive loads (R1-R30) in a series-parallel manner.
2. The load testing device based on aging of high power electronic switch module according to claim 1, characterized in that: The three-phase isolation transformer (TR2) has a power of 15 KVA and a transformation ratio of 380 V / 17.3 V; the primary side input line voltage of the three-phase isolation transformer (TR2) is 380 V; and the secondary side output line voltage of the three-phase isolation transformer (TR2) is 17.3 V.
3. The load testing device based on aging of high power electronic switch module according to claim 1, characterized in that: The electronic switch (FS) uses a thyristor as an on / off device and controls the conduction or turn-off of the thyristor through a program.
4. The load testing apparatus based on aging of high power electronic switch modules of claim 3, wherein: The input and output terminals of the electronic switch (FS) are both plug-in connectors.
5. The load testing apparatus based on aging of high power electronic switch modules of claim 1, wherein: The air switches (KA1-KA10) use three-pole 100 A miniature circuit breakers to control the load input or exit and close or open the air switches according to the current needs.
6. The load testing apparatus based on aging of high power electronic switch modules of claim 1, wherein: The resistive loads (R1-R30) are three-section iron-chromium-aluminum resistors, which are respectively connected in series at the three output ends of the load-side air switches (KA1-KA10).
7. The load testing apparatus based on aging of high power electronic switch modules of claim 6, wherein: The specification of the single-section iron-chromium-aluminum resistor is 0.16 R / 62.5 A.
8. The load testing apparatus based on aging of high power electronic switch module of claim 1, wherein: A mutual inductor (TA1-TA3) is arranged between the three-phase isolation transformer (TR2) and the electronic switch (FS).
9. The load testing apparatus based on aging of high power electronic switch module of claim 1, wherein: The load test device based on the aging of the high-power electronic switch module further comprises a cabinet (1), and the three-phase voltage regulator (TR1) is located outside the cabinet (1).
10. The load testing apparatus based on aging of high power electronic switch modules of claim 9, wherein: The cabinet (1) is provided with a plurality of alternating current fans for heat dissipation of the resistive loads (R1-R30).