Intelligent power supply management system of GIS operation test equipment

Abstract

The utility model discloses an intelligent power supply management system for GIS operation test equipment, which belongs to the field of GIS operation test equipment and comprises a power supply, a time relay and a switch, and a power supply line of the power supply is in power supply connection with the GIS operation test equipment. The time relay is used for controlling the power supply line of the GIS operation test equipment to be disconnected when the timing reaches the set time; and the switch is used for controlling the switching of the time relay when the test residual duration is less than the maximum setting duration of the time relay. The time relay is controlled by the switch to be switched on when the test residual duration is less than the maximum setting duration of the time relay, so that the power-off control function of the time relay on test equipment with longer test time is realized; the accuracy of a test result is improved, and unnecessary electrification loss of test equipment is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of GIS operation test equipment, in particular to an intelligent power supply management system for GIS operation test equipment. Background Art

[0002] GIS characteristic tests include continuous pre-characteristic test, 200 times continuous running-in test, 200 times continuous post-characteristic test and 10,000 times life test. Among them, the shortest test time is more than ten hours, and the longest test time is about 500 hours.

[0003] In order to ensure the accuracy of the test, the relevant test equipment needs to be shut down in time after the test reaches the end time. At present, manual detection is generally used to shut down the test equipment. Since the end time of the test may be at night, there are problems such as inconvenience in night shifts and inaccurate manual shutdown of the test time. In order to solve this problem, some people use the method of installing time relays on the test equipment to solve the above problems. Time relays are commonly used in industry and have the advantages of high accuracy and strong reliability. They solve the problem of inaccurate shutdown time when manually shutting down the equipment. However, the maximum setting range of the time relay is generally 0-99.99 hours, and in the GIS characteristic test, some tests are about 500 hours long, which far exceeds the setting range of the time relay. This results in the time relay being unable to perform timed power-off control on the test equipment of the test.

[0004] In summary, since the test duration of some GIS characteristic tests is much longer than the setting range of the time relay, it is difficult for the time relay to perform good power-off control on the test equipment of the test. Utility Model Content

[0005] The purpose of the utility model is to provide an intelligent power management system for GIS operation test equipment to solve the technical problem in the prior art that the test duration of some GIS characteristic tests is much longer than the setting range of the time relay, making it difficult for the time relay to perform good power-off control on the test equipment of the test.

[0006] To achieve the above purpose, the technical solution of the intelligent power management system for GIS operation test equipment provided by the utility model is:

[0007] An intelligent power management system for GIS operation test equipment includes a power supply and a time relay. The power supply is used to connect to the GIS operation test equipment through a power supply line. The time relay is used to control the power supply line of the GIS operation test equipment to be disconnected when the timing reaches a set time. The switch is also included. The switch is arranged in series on the power supply circuit of the time relay coil and is used to be turned on when the remaining test time is less than the set time of the time relay.

[0008] The beneficial effect is that the time relay is controlled by the switch to be put into operation when the remaining test time is less than the maximum setting time of the time relay, so that the time relay can realize the power-off control function of the test equipment with a long test time, improve the accuracy of the test results, and reduce unnecessary live power loss of the test equipment.

[0009] As a further improvement, the switch is an air switch which is connected in series in the power supply circuit of the time relay coil.

[0010] The beneficial effect is that the air switch has high safety, and the use of the air switch can effectively improve the overall safety of the system.

[0011] As a further improvement, a contact switch of a contactor is arranged on the power supply line of the GIS operation test equipment, and a normally closed delay contact switch of a time relay is connected in series to the power supply circuit where the contactor coil is located.

[0012] The beneficial effect is that the normally closed delay contact switch of the time relay will be disconnected when the set time is reached, further de-energizing the contactor coil, thus achieving the effect of the time relay action controlling the contactor. In addition, the contactor is used to effectively isolate the time relay from the power supply line of the test equipment, thus ensuring the safety of the power management system.

[0013] As a further improvement, the contactor includes a first contactor and a second contactor. The normally open contact switch of the first contactor is connected in series to the AC380 power supply circuit of the GIS operation test equipment, the first normally open contact switch of the second contactor is connected in series to the AC220 power supply circuit of the GIS operation test equipment, and the second normally open contact switch of the second contactor is connected in series to the AC110 power supply circuit of the GIS operation test equipment.

[0014] The beneficial effect is that since there are multiple power supplies, the power supply required for each test is also different, and the classified control of the power supply is achieved through two contactors to ensure the precision of control.

[0015] As a further improvement, the first contactor includes three normally open contact switches, and the three normally open contact switches are respectively connected in series to the three-phase lines of the AC380 power supply line.

[0016] The beneficial effect is: since AC380 is three-phase electricity, in order to improve the precision of control, a normally open contact switch is set on each line of the three-phase line, and these switches all belong to the first contactor to ensure the synchronization of control.

[0017] As a further improvement, the power supply circuit of the time relay coil and the power supply circuit where the contactor coil is located are connected to the AC220 power supply line of the power supply

[0018] The beneficial effect is that the time relay and contactor in the system directly use the power supply for the test equipment to operate, and do not need to be connected to other external power supplies, thereby improving the convenience of the system.

[0019] As a further improvement, the power supply is connected to the GIS operation test equipment via an insulated plug-in banana plug.

[0020] The beneficial effect is that when an insulated plug-in banana plug fails, it can be quickly replaced without power outage, thus avoiding production stagnation caused by power outage maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The utility model is a schematic diagram of the circuit principle of the intelligent power management system of the GIS operation test equipment. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model, that is, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] GIS operation test equipment intelligent power management system implementation example:

[0024] like Figure 1 As shown, an intelligent power management system for GIS operation test equipment includes a power supply, a time relay and a switch. The power supply is used to connect to the power supply of the GIS operation test equipment through a power supply line. The time relay is used to control the power supply line of the GIS operation test equipment to be disconnected when the timing reaches the set time. It also includes a switch, which is arranged in series on the power supply circuit of the time relay coil and is used to be turned on when the remaining time of the test is less than the setting time of the time relay. That is, the time relay is controlled by the switch to be put into operation when the remaining time of the test is less than the maximum setting time of the time relay, so that the power-off control function of the time relay for the test equipment with a long test time is realized. The time relay adopts a 48T time relay.

[0025] Preferably, the switch adopts an air switch, which is connected in series with the coil of the time relay and is used to close when the remaining test time is less than the maximum setting time of the time relay to control the input of the time relay. The opening and closing of the air switch can be controlled manually, because the test equipment is guarded during the day, so it does not increase the cost for the on-duty personnel to operate the air switch, or other control devices can be used for control. Figure 1 The contacts 1 and 2 on the 8A1 are formed.

[0026] In order to effectively isolate the time relay from the power supply line of the test equipment, a contactor switch is provided on the power supply line of the GIS operation test equipment, and the normally closed delay contact switch of the time relay is connected in series to the power supply circuit where the contactor coil is located.

[0027] In order to ensure the precision of control, the contactor includes a first contactor and a second contactor. The normally open contact switch of the first contactor is connected in series to the AC380 power supply circuit of the GIS operation test equipment, the first normally open contact switch of the second contactor is connected in series to the AC220 power supply circuit of the GIS operation test equipment, and the second normally open contact switch of the second contactor is connected in series to the AC110 power supply circuit of the GIS operation test equipment. Figure 1 KM1 and KM2 in .

[0028] The specific working principle is: when the remaining time of the test is less than the maximum setting time of the time relay, the air switch is closed, the coil of the time relay is energized, and the normally closed delay contact switch of the time relay is disconnected after the delay setting time; the corresponding relay coil connected in series with the normally closed delay contact switch loses power, that is, the coils of the first contactor and the second contactor lose power; the normally open contact switches corresponding to the first contactor and the second contactor, the first normally open contact switch and the second normally open contact switch are all disconnected, cutting off the power supply circuit of the GIS operation test equipment, and the GIS operation test equipment loses power and shuts down. The effect of the time relay cutting off the power supply of the GIS operation test equipment at the set time is achieved.

[0029] Specifically, since AC380 is a three-phase power supply, in order to improve the precision of control, the first contactor includes three normally open contact switches, which are respectively connected in series to the three-phase lines of the AC380 power supply line. The three normally open contact switches are switches composed of contact points 1 and 2, 3 and 4, and 5 and 6 corresponding to KM1. The three-phase lines are Figure 1 The R038, T038 and S038 lines in the.

[0030] The second contactor includes two first normally open contact switches, which are respectively connected in series to the high voltage input line R022 and the low voltage output line T022 of the AC220 power supply line. Figure 1 The contact points 1 and 2, 3 and 4 of KM2 on the upper surface are formed.

[0031] The second normally open contact switches of the second contactor include two, and the two first normally open contact switches are respectively connected in series to the high voltage input line R011 and the low voltage output line T011 of the AC110 power supply line. Figure 1 The contact points 5 and 6, 13 and 14 of KM2 on the upper surface are formed.

[0032] In order to improve the simplicity of the system, the power supply circuit of the time relay coil and the power supply circuit of the contactor coil are connected to the AC220 power supply line of the power supply. That is, the coils of the time relay and the contactor are powered by the power supply of the GIS operation test equipment, and there is no need to carry an additional power supply to power the system.

[0033] The power supply and GIS operation test equipment are connected through an insulated plug-in banana plug. When a power management system component fails, it can be quickly replaced without power outage, avoiding production stagnation caused by power outage maintenance.

[0034] in addition, Figure 1 The NFB-3 switch in the figure is the original power switch on the AC110 power line of the power supply. The NFB-4 switch is the original power switch on the AC220 power line of the power supply. The NFB-5 switch is the original power switch on the AC380 power line of the power supply.

[0035] After applying the power management system, the power-on time of each test equipment can be reduced by 3,276 hours per year. Based on the test equipment's power consumption of 5 kWh per hour, 16,380 kWh of electricity can be saved each year. Calculated at 1 yuan per kWh, 163,800 yuan can be saved.

[0036] Finally, it should be noted that the above is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments without creative work, or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An intelligent power management system for GIS operation test equipment, comprising a power supply and a time relay, wherein the power supply is used to connect to the GIS operation test equipment through a power supply line, and the time relay is used to control the power supply line of the GIS operation test equipment to be disconnected when the timing reaches a set time, characterized in that: It also includes a switch, which is arranged in series on the power supply circuit of the time relay coil and is used to be turned on when the remaining test time is less than the set time of the time relay.

2. The intelligent power management system for GIS operation test equipment according to claim 1 is characterized in that: The switch is an air switch, which is connected in series in the power supply circuit of the time relay coil.

3. The intelligent power management system for GIS operation test equipment according to claim 1 is characterized in that: The power supply line of the GIS operation test equipment is provided with a contact switch of the contactor, and the normally closed delay contact switch of the time relay is connected in series to the power supply circuit where the contactor coil is located.

4. The intelligent power management system for GIS operation test equipment according to claim 3 is characterized in that: The contactor includes a first contactor and a second contactor. The normally open contact switch of the first contactor is connected in series to the AC380 power supply circuit of the GIS operation test equipment, the first normally open contact switch of the second contactor is connected in series to the AC220 power supply circuit of the GIS operation test equipment, and the second normally open contact switch of the second contactor is connected in series to the AC110 power supply circuit of the GIS operation test equipment.

5. The intelligent power management system for GIS operation test equipment according to claim 4 is characterized in that: The first contactor includes three normally open contact switches, which are respectively connected in series to the three-phase lines of the AC380 power supply circuit.

6. The intelligent power management system for GIS operation test equipment according to claim 3 is characterized in that: The power supply circuit of the time relay coil and the power supply circuit of the contactor coil are both connected to the AC220 power supply line of the power supply.

7. The intelligent power management system for GIS operation test equipment according to claim 1 is characterized in that: The power supply is connected to the GIS operation test equipment via an insulated plug-in banana plug.

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