On-site current rising test device and system for GIS (Gas Insulated Switchgear) equipment
By designing flexible connecting conductors in GIS equipment to form a current loop, the problem of on-site current rise testing was solved, the test efficiency and defect detection rate were improved, and the equipment safety and grid power supply reliability were ensured.
Patent Information
- Application Number
- CN202422301343.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-09-20
AI Technical Summary
Existing technology makes it difficult to conduct current-increasing tests on GIS equipment on site, mainly due to limited on-site conditions. It is difficult to form a suitable current loop without changing the internal structure of the equipment, resulting in limitations in detecting foreign objects, affecting equipment safety and grid power supply reliability.
By designing flexible connecting conductors, current loops with the same phase but different intervals or different phases but different intervals can be formed. Soft short-circuit wires or hard pipe mothers can be used to establish current loops in GIS equipment to achieve on-site current increase tests.
It improves the efficiency and defect detection rate of GIS equipment field testing, ensures equipment safety and grid power supply reliability, and adapts to GIS equipment of different voltage levels and structures.
Smart Images
Figure CN223450077U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application claims a GIS device test device, in particular to a field current rise test device for GIS device. BACKGROUND
[0002] Gas insulated metal enclosed combined electric appliance (GIS) device is one of the key main devices of substation, and its operation quality directly affects the power supply reliability of power grid. In the engineering installation stage of GIS device, improving the defect detection rate is an important means to prevent the main device from entering the network with defects. At present, the handover test of GIS device mainly adopts the conventional AC withstand voltage test method. However, this method has limitations in detecting some foreign matters inside GIS device, which cannot be found by ultrasonic partial discharge test method. These undiscovered foreign matters may cause flashover after the GIS device is put into operation, which seriously affects the quality evaluation in the engineering installation stage.
[0003] Research shows that the application of current has a positive effect on the detection of some defects of GIS device. The size of current will affect the partial discharge measurement of some foreign matters inside GIS, and make the poorly installed components vibrate, so that they are more easily detected.
[0004] Although the current rise test of GIS device is widely used in the laboratory, such as for the temperature rise test of GIS device, due to the limitation of field conditions, the field current rise test has almost failed to carry out. The main difficulty is how to form a suitable current loop on site without changing the internal installation mode of GIS device to carry out the field current rise test. CONTENT OF THE INVENTION
[0005] In order to solve the technical problems existing in the background art, the application provides a field current rise test device for GIS device.
[0006] The field current rise test device for GIS device provided by the application comprises: a GIS bus device, a GIS first interval, a GIS second interval and a connecting conductor; the GIS bus device is connected with the GIS first interval and the GIS second interval respectively; the GIS first interval and the GIS second interval respectively comprise a circuit breaker, a disconnector and an outgoing line bushing, wherein the disconnector is located on both sides of the circuit breaker, connecting the input end and the output end of the circuit breaker, and the output end of the circuit breaker is connected to the outgoing line bushing; the connecting conductor is connected with the outgoing line bushing in the interval to form a current loop in the GIS device, so as to realize the field current rise test.
[0007] Optionally, the connecting conductor is connected with the outgoing line bushing in the interval, comprising: the connecting conductor is connected with the outgoing line bushing in the GIS first interval and the GIS second interval.
[0008] Optionally, the connecting conductor is connected with the outgoing line bushing in the interval, comprising: the connecting conductor is connected with the outgoing line bushing in the GIS first interval and the GIS second interval.
[0009] Optionally, the GIS first interval and the GIS second interval further comprise: a soft short-circuit wire clamp on both sides of the soft short-circuit wire, and the soft short-circuit wire clamp is connected with the outgoing line bushing through a bolt.
[0010] The application also provides a field current ramp-up test system for a GIS device, comprising a current ramp-up device, a measurement device, a control device, and any one of the field current ramp-up test devices for a GIS device described above; the current ramp-up device is connected with a current loop of the GIS device, the measurement device is connected to the current loop, and the control device is connected with the current ramp-up device and the measurement device.
[0011] Optionally, the current ramp-up device comprises an adjustable current source.
[0012] Optionally, the measurement device comprises a current transformer and a voltage transformer.
[0013] Optionally, the control device comprises a microprocessor, a display unit, and a data processing unit.
[0014] The application has the following advantages compared with the prior art:
[0015] The application provides a field current ramp-up test device for a GIS device, comprising: a GIS bus device, a GIS first interval, a GIS second interval, and a connecting conductor; the GIS bus device is connected with the GIS first interval and the GIS second interval respectively; the GIS first interval and the GIS second interval respectively comprise a circuit breaker, an isolating switch, and an outgoing line bushing, wherein the isolating switch is located on both sides of the circuit breaker, connecting the input end and the output end of the circuit breaker, and the output end of the circuit breaker is connected to the outgoing line bushing; the connecting conductor is connected with the outgoing line bushing in the interval, forming a current loop in the GIS device to realize field current ramp-up test.
[0016] The application can form a current loop between different intervals or different phases in the same interval without changing the internal structure of the GIS device, so that the current test of the GIS device can be completed on site, and the test efficiency and defect detection rate are improved.
[0017] Further, the GIS device of different voltage levels and structures can be adapted by different connection modes (different phases and different intervals or different phases and different intervals), and the soft short circuit line or hard pipe bus is used as the connecting conductor, which is convenient to install and remove, and greatly improves the efficiency of on-site test. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 The application provides a GIS on-site current test device for forming a loop between different phases and different intervals in a closed state.
[0019] Figure 2 The application provides a GIS on-site current test device for forming a loop between different phases and different intervals in a closed state.
[0020] Figure 3 The application provides a GIS on-site current test device for forming a loop between different phases and different intervals in a closed state.
[0021] Figure 4 The application provides a GIS on-site current test device for forming a loop between different phases and different intervals in a closed state.
[0022] Figure 5 The application provides a GIS on-site current test device for forming a loop between different phases and different intervals in a closed state. DETAILED DESCRIPTION
[0023] The following content is provided as an example of the specific implementation process of the technical solution to be protected by the application, but the application can also be implemented in other ways different from the description, and those skilled in the art can implement the application by using different technical means under the guidance of the concept of the application, so the application is not limited by the following specific embodiments.
[0024] The application provides a GIS on-site current test device. The device can solve the problem that the on-site current test of the GIS device is difficult to carry out, and provides a new technical means for evaluating the installation quality of the GIS device.
[0025] Currently, the field handover test of GIS equipment mainly relies on conventional AC withstand voltage test. However, this method has limitations in detecting some foreign matters inside the GIS equipment, and the undiscovered foreign matters may cause flashover after the GIS equipment is put into operation, which not only affects the safety of the equipment, but also reduces the reliability of power supply of the power grid. Although the GIS equipment can be effectively detected by the rising current test in the laboratory, due to the limitation of the field conditions, especially the difficulty in forming a suitable current loop without changing the internal structure of the GIS equipment, the field rising current test is difficult to implement.
[0026] Based on this, the application provides a field rising current test device for GIS equipment, which utilizes a flexible connecting conductor design to form a current loop between different intervals or establish a connection between different phases in the same interval, thereby realizing the field rising current test without changing the internal installation method of the GIS equipment and improving the test efficiency.
[0027] As shown in Figure 1 , the application provides a field rising current test device for GIS equipment, which comprises: a GIS bus equipment 3, a GIS first interval 1, a GIS second interval 2, and a connecting conductor 5; the GIS bus equipment 3 is connected with the GIS first interval 1 and the GIS second interval 2 respectively; the GIS first interval 1 and the GIS second interval 2 each comprise a circuit breaker 12 (22), disconnector 11, 13 (21, 23) and an outgoing line bushing 14 (24), wherein the disconnector 11, 13 (21, 23) is located on both sides of the circuit breaker 12 (22), connecting the input end and the output end of the circuit breaker 12 (22), and the output end of the circuit breaker 12 (22) is connected to the outgoing line bushing 14 (24); the connecting conductor 5 is connected with the outgoing line bushing 14 (24) in the interval to form a current loop in the GIS equipment and realize the field rising current test.
[0028] The application forms a current loop in the GIS equipment in two ways: forming a loop in the same phase and different intervals and forming a loop in different phases and different intervals. The connecting conductor in the two loops is respectively a soft short-circuit wire and a hard pipe bus, which is connected with the outgoing line bushing in the interval.
[0029] The embodiments will be described in detail below with reference to the accompanying drawings:
[0030] Embodiment one:
[0031] Figure 1 And Figure 2 is a structure schematic diagram of the GIS field rising current test device for forming a loop in the same phase and different intervals in the embodiments of the application.
[0032] As shown in Figure 1As shown, the utility model provides an on-site current rising test device for GIS equipment, including a GIS first bay 1, a GIS second bay 2, a GIS busbar device 3 and a connecting conductor 5.
[0033] The GIS busbar equipment 3 is connected to the GIS first bay 1 and the GIS second bay 2 respectively.
[0034] The structures of the first bay 1 and the second bay 2 of the GIS are identical, both including circuit breakers, disconnectors, and outlet bushings. For example, the first bay 1 of the GIS includes disconnector 11, circuit breaker 12, disconnector 13, and outlet bushing 14. Disconnectors 11 and 13 are located on either side of circuit breaker 12, connecting the input and output terminals of circuit breaker 12. The output terminal of circuit breaker 12 is connected to outlet bushing 14 via disconnector 13.
[0035] In this embodiment, the connecting conductor is a flexible shorting wire 5, which connects to the outgoing bushing 14 of the first bay 1 of the GIS and the outgoing bushing 24 of the second bay 2 of the GIS, forming a current loop within the GIS equipment and enabling on-site current ramp-up testing. Specifically, the flexible shorting wire 5 is connected to the outgoing bushings 14 and 24 via wire clamps 16 and 26, respectively. Bolts are used to connect the clamps 16 and 26 to the outgoing bushings 14 and 24, ensuring reliable and secure connections.
[0036] When conducting a flow test, if Figure 2 As shown, the circuit breakers and disconnectors in the GIS first bay 1 and the GIS second bay 2 are both in the closed state.
[0037] For example, if disconnectors 11, 13, and circuit breaker 12 in the first bay 1 of the GIS, and disconnectors 21, 23, and circuit breaker 22 in the second bay 2 of the GIS, are all closed, the current can form a complete loop through the GIS busbar equipment 3, the first bay 1 of the GIS, the flexible short-circuit wire 5, and the second bay 2 of the GIS.
[0038] This embodiment uses the same-phase, different-interval loop formation method, which is mainly suitable for GIS equipment with lower voltage levels or when single-phase testing is required. Due to the lower voltage level, the air insulation distance between different intervals is shorter, making it easier to form a loop.
[0039] Example 2:
[0040] Figure 3 and Figure 4 It is a structural schematic diagram of a GIS on-site flow-increasing test device in which different phases and intervals form a loop in an embodiment of the present application.
[0041] like Figure 3As shown, the utility model provides another on -the -spot rise flow test device for GIS equipment, including GIS first interval 1, GIS second interval 2, GIS bus equipment 3 and connecting conductor.GIS bus equipment 3 includes the bus equipment 31 of A phase and the bus equipment 32 of B phase.
[0042] Different from embodiment 1, this embodiment adopts the mode of forming loop in different phase and different interval.Specifically, connecting conductor adopts hard pipe busbar 15, 25.Hard pipe busbar 15 connects the A phase outgoing line bushing 14 and B phase outgoing line bushing 14 of GIS first interval 1, and hard pipe busbar 25 connects the A phase outgoing line bushing 24 and B phase outgoing line bushing 24 of GIS second interval 2.
[0043] GIS first interval 1 and GIS second interval 2 are same in structure, and all include circuit breaker, isolating switch and outgoing line bushing.For example, GIS first interval 1 includes A phase circuit breaker 12 and the isolating switch 11, isolating switch 13 on both sides, and B phase circuit breaker 12 and the isolating switch 11, isolating switch 13 on both sides.
[0044] When carrying out rise flow test, as shown, Figure 4 All circuit breakers and isolating switches in GIS first interval and GIS second interval are in the state of closing, so that current can form loop through the following path:
[0045] GIS's A phase bus equipment 31→GIS first interval 1's A phase→hard pipe busbar 15→GIS first interval 1's B phase→GIS's B phase bus equipment 32→GIS second interval 2's B phase→hard pipe busbar 25→GIS second interval 2's A phase→GIS's A phase bus equipment 31.
[0046] This embodiment is mainly applicable to the GIS equipment of higher voltage grade.Because the voltage grade is higher, the air insulation distance between different intervals is longer, so the mode of forming loop between two phases in same interval is more suitable.
[0047] Embodiment three:
[0048] Figure 5 It is a structure schematic diagram for on -the -spot rise flow test system of GIS equipment in the embodiment of the application.
[0049] As shown, Figure 5 The utility model further provides a kind of on -the -spot rise flow test system for GIS equipment, including rise flow device 31, measuring device 32, control device 33 and the GIS equipment on -the -spot rise flow test device 34 in above-mentioned embodiment.
[0050] The current-rising device 31 is connected to the current loop of the GIS equipment and used to provide adjustable test current to the current loop.
[0051] The measuring device 32 is connected to the current loop and used to measure electrical parameters in the current loop. The measuring device 32 includes current transformers and voltage transformers for measuring current and voltage values in the loop, respectively.
[0052] The measuring device 32 can also include temperature sensors, vibration sensors, etc. for monitoring temperature changes and mechanical vibration conditions of the GIS equipment during the current-rising process.
[0053] The control device 33 is connected to the current-rising device 31 and the measuring device 32 and used to control the entire test process and process test data. The control device 33 includes a microprocessor, a display unit, and a data processing unit. The microprocessor is responsible for controlling the output of the current-rising device 31, adjusting the size and duration of the test current. The display unit displays test parameters and measurement results in real time. The data processing unit analyzes and processes collected data.
[0054] In practical applications, the working process of the field current-rising test system for GIS equipment provided by the utility model is as follows:
[0055] Firstly, system initialization. The operator inputs test parameters, including target current value, current-rising rate, duration, etc. through the human-machine interface of the control device 33.
[0056] Secondly, system safety self-check. The states of the circuit breakers and disconnectors of the GIS equipment are checked to ensure that all switches are in the correct position.
[0057] Thirdly, current-rising process. The control device 33 controls the current-rising device 31 to gradually increase the output current until the set value is reached. In this process, the measuring device 32 continuously monitors parameters such as current, voltage, temperature, etc. in the loop.
[0058] Fourthly, data acquisition. The control device 33 collects data of the measuring device 32 in real time and displays it on the display unit. At the same time, the data processing unit preliminarily analyzes the collected data to detect whether there are abnormal conditions.
[0059] Fifthly, current-decreasing process. After the test time ends, the control device 33 controls the current-rising device 31 to gradually decrease the output current until zero.
[0060] Eighthly, data analysis. After the test is completed, the data processing unit analyzes the data of the entire test process and generates a test report.
[0061] In the ninth step, the result is output. The control device 33 displays the analysis result on the display unit.
[0062] In practical applications, the system can be flexibly configured according to specific needs. For example:
[0063] For large GIS equipment, the measuring device further comprises a plurality of temperature sensors for multi-point temperature distribution monitoring in the large GIS equipment.
[0064] For GIS equipment in special environments, the measuring device further comprises a humidity sensor and a barometric pressure sensor for monitoring the humidity and barometric pressure parameters of the environment in which the GIS equipment is located.
[0065] In addition, the system can also interact with the integrated automation system of the substation to realize more extensive equipment state monitoring and diagnosis.
Claims
1. An on-site flow-up test device for GIS equipment, characterized in that: include: GIS busbar equipment, GIS first bay, GIS second bay, connecting conductors; The GIS busbar equipment is connected to the GIS first bay and the GIS second bay respectively; The first GIS bay and the second GIS bay respectively include a circuit breaker, an isolating switch, and an outlet bushing, wherein the isolating switch is located on both sides of the circuit breaker and connects the input and output ends of the circuit breaker, and the output end of the circuit breaker is connected to the outlet bushing; The connecting conductor is connected to the outlet bushing in the interval to form a current loop in the GIS equipment, thereby realizing an on-site current increase test.
2. The on-site flow-up test device for GIS equipment according to claim 1, characterized in that: The connecting conductor is connected to the outlet bushing in the interval, comprising: The connecting conductor is connected to the corresponding outlet bushings in the first bay of the GIS and the second bay of the GIS.
3. The on-site flow-up test device for GIS equipment according to claim 2, characterized in that: The connecting conductor is a soft short-circuit wire.
4. The on-site flow-up test device for GIS equipment according to claim 1, characterized in that: The connecting conductor is connected to the outlet bushing in the interval, comprising: The connecting conductors are respectively connected to the A-phase outgoing bushing and the B-phase outgoing bushing of the first bay of the GIS, and the A-phase outgoing bushing and the B-phase outgoing bushing of the second bay of the GIS.
5. The on-site flow-up test device for GIS equipment according to claim 4, characterized in that: The connecting conductor is a hard tube mother.
6. The on-site flow-up test device for GIS equipment according to claim 2, characterized in that: The GIS first compartment and the GIS second compartment further include: wire clamps on both sides of a soft short-circuit wire, and the soft short-circuit wire clamps are connected to the outlet bushings via bolts.
7. A field upflow test system for GIS equipment, characterized in that: The system comprises a flow-raising device, a measuring device, a control device and an on-site flow-raising test device for GIS equipment according to any one of claims 1 to 6; The current boosting device is connected to the current loop of the GIS equipment, the measuring device is connected to the current loop, and the control device is connected to the current boosting device and the measuring device.
8. The on-site flow-up test system for GIS equipment according to claim 7, characterized in that: The current boosting device includes an adjustable current source.
9. The on-site flow-up test system for GIS equipment according to claim 7, characterized in that: The measuring device includes a current transformer and a voltage transformer.
10. The on-site flow-up test system for GIS equipment according to claim 7, characterized in that: The control device includes a microprocessor, a display unit and a data processing unit.