This parameter is suitable for the impact withstand voltage test equipment of 35KV high voltage switchgear. It presents the technical description of the functional design, structure, performance, installation and test of the equipment. This set of equipment meets the current international standards, national standards and related industry standards.
Insulation coordination of high voltage power transmission and transformation equipment GB/T16927.1-1997 High voltage test technology General test requirements GB/T16927.2-1997 High voltage test technology measurement system GB/T16896.1-1997 digital recorder for high voltage impact test ZB F24 001-90 Implementation Rules for impulse Voltage measurement GB191 Packaging transport mark GB4208 shell protection class GB813-89 shock test oscilloscope and peak meter
The impulse voltage generator test system device is mainly applicable to the impact full wave voltage withstand test of 35kV switch, and can also be used for the impact test of other products. 3.1 The altitude shall not exceed 1500m 3.2 Ambient temperature: -15~ 15 ºC 3.3 Air relative humidity: ≤90% 3.4 Installation location: indoor use, movable 3.5 Must have a reliable ground point, grounding resistance ≤0.5Ω!
| Nominal lightning wave impulse voltage |
HTCJ-300kV |
| Nominal capacity (energy |
7.5 kJ |
| Class capacitance |
0.5μF, 100kV dry insulation package |
| stage voltage |
100kV |
| stage/stage capacity |
3/2.5kJ |
| Output waveform |
(Load capacitance < 3000pF, efficiency ≥90%)1.2μs±30%/50μs±20% standard lightning impulse voltage full wave |
| Synchronization range |
greater than 20% |
| Use duration |
It can work continuously when the rated working voltage is less than 80%. It can work intermittently when the rated working
voltage is more than 80% |
| Synchronization error Rate |
Less than 1% |
| |
Amplitude adjustment error voltage difference is less than 1%, and the minimum output voltage is less than 10% of the device nominal voltage. |
kdzd Automatic Lightning Impulse Voltage Generator/Lightning Impact High Voltage Tester
4.2 Technical description of impulse voltage generator
4.2.1 Structure of the generator
4.2.1.1 The main loop design of G series is adopted, thus achieving the overall small size.
4.2.1.2 Using the low-speed rack and pinion drive mechanism of one revolution per minute to adjust the ball clearance at all levels, not only without noise, The wear is small, and the positioning is fast and accurate.
4.2.1.3 The modulated resistance fixed mechanism with spring crimping and easy to plug is adopted to ensure the reliability of contact.Make the output waveform smooth and burr free.
4.2.1.4 Pulse amplifier combined with HT-2008 control system can make the synchronous ball gap more than 20% of the contact
Send range, ensure the reliability of the trigger, automatic control is convenient and reliable.
4.2.1.5 The trigger of synchronous ball gap has no polarity effect and does not require bilateral trigger.
4.2.2 Main capacitor
4.2.2.1 The main capacitors are high-density solid capacitors, each of which has a capacitance of 0.5±0.05μF and a DC working voltage of earth 100kV, capacitor inherent inductance is small, light weight, small size.
4.2.2.2 The concave and convex deformation of the capacitor is less than 1mm in the normal working state and working environment. 4.2.2.3 The capacitors are solid insulating media and dry insulating package of the shell, and there are no problems such as oil leakage and deformation.
4.2.3 Modulating element
4.2.3.1 The wave head and wave tail resistors have sufficient heat capacity, which can ensure the generator to run continuously for a long time.
4.2.3.2 The charging resistor has sufficient heat capacity to ensure the generator to run continuously for a long time.
4.2.3.3 Wave head and wave tail resistors are made of plate structure, non-inductive winding of Constancopper wire, and external vacuum of insulating resin Casting, the joint is spring crimped, easy to install. 4.2.3.4 Connecting heads of wave head and wave tail resistors are made of 3mm stainless steel wire-cut.
4.2.3.5 There are 2 groups of wave head resistance, 1 group of wave tail resistance for lightning shock, and 1 group of charging resistance and protection resistance.
4.2.4 Control and protection system The HT-2008 automatic control system is used to provide various controls for the main part of the impulse voltage generator, which fully meets the various control functions of the impulse test. HT-2008 control system adopts imported components, and connects with the main body of the equipment by two fiber cables.
4.2.4.1 HT-2008 automatic control system with FX2N series programmable controller as the core device, so the size of the controller is very small, the controller can achieve manual control and automatic control. The use of special software packages can be controlled by computer, so as to achieve intelligent operation. The special software package can be used with the peak voltmeter and oscilloscope for measurement and waveform analysis to realize the integration of computer measurement and control of impulse voltage test system. The control system has the following control functions PLC technology is used to transmit control commands and feedback equipment status using two-core optical fiber, thus avoiding electromagnetic interference and improving the security of control system and computer. The control function has manual, automatic and program control functions, and each level of function is relatively independent to ensure the reliability of the system. Using thyristor voltage regulation mode, with charging voltage feedback measurement system. The ignition gap and cut-off gap distance can be manually and automatically adjusted and displayed on the LCD panel. A clipped trigger pulse with adjustable delay and a feedback system with generator ignition trigger. The stability of charging voltage can reach 0.5% by using constant current charging mode controlled by function. The LCD panel can indicate the charging voltage and charging process of the shock generator with an accuracy of 1%. The charging voltage and charging time can be directly input from the LCD panel. With charging abnormal protection function, can automatically or manually trigger the ignition pulse Indication of the working state of the impact generator, such as spontaneous combustion, no trigger, abnormal charging, stable charging, etc. Grounding and grounding release control of the main body and charging part of the device. The charging voltage polarity can be automatically changed by the button on the controller The charging process can be automatically or manually controlled charging voltage can be automatically or manually sounded alarm
With over current and over voltage automatic protection isolation filter shield design
4.2.4.3 Pneumatic trigger is used in the synchronous ball gap to ensure the reliability of trigger, no self-discharge phenomenon, and the range is greater than 50%. Safety grounding system
4.2.5.1 The electromagnet automatic grounding mechanism is used to ground the first stage capacitance of the generator through a grounding resistance.
4.2.5.2 Grounding operation and charging control have interlocking protection to ensure safe and normal operation.
4.3 Main Configuration Devices Rectifier charging power supply (integrated with impact body) Type number: LGR-100/30 Rated voltage: Un = ±100kV DC (positive or negative polarity) Rated current: In = 30mA (at rated voltage) Voltage control: thyristor module voltage regulation, voltage regulation range 0~100% Un Polarity conversion: Can change the direction of the high voltage silicon pile Input voltage: 220V two-phase voltage Power frequency: 50/60 Hz Power consumption: about 3kVA
4.3.2 Weakly damped capacitance divider Type number: CR-300/800 Rated voltage: 300kV Rated capacitance: 800pF Number of capacitor sections: 1 Square-wave response: Partial response time less than 100ns, overshoot less than 10% Partial pressure ratio: depending on the situation Partial pressure ratio uncertainty: less than 1%
4.3.3 Measuring Devices Model number: DMS-1000 Digital Impact Measurement System Waveform measurement: imported US Tektronix color high voltage digital oscilloscope Sampling rate 1.0GS/s, bandwidth greater than 100MHz, resolution 8bit recording length 10k bytes (can meet the impact test requirements), 2 channels Waveform analysis: Industrial control computer (including display) Shock measurement software package: Impact waveform parameter calculation and display Waveform comparison function Waveform amplification, reduction and translation of waveform storage and call waveform mapping and report preparation Accessories: One high performance 100x special attenuator DEC modulating resistance: There are 2 groups of wave head resistors, 1 group of wave tail resistors for lightning shock, and 1 group of charging resistors And protection resistance
Technical solution characteristic description
1. The main voltage of SGS generator used in the scheme is 100kV, which is in line with the current development trend at home and abroad. The main structure adopts the structural design of the world famous company HAEFELY, which is the current compact structure generator in China. It has the characteristics of small inherent inductance and convenient wave modulation.
2. The control and measurement system used in the scheme is a product with good domestic technology at present, and the core device is Mitsubishi Corporation of Japan FX series programmable controller, control functions are implemented by software programming, so the system structure is simple, less peripheral circuit board, high reliability. 3, the integrated design of the measurement and control structure of the program, with liquid crystal display industrial computer, can realize automatic control and measurement Quantitative analysis. The measurement and control system is operated by LCD touch screen, with a variety of state prompt screen, and realizes the intelligent operation of man-machine dialogue. The system eliminates the multi-core control cable, adopts optical fiber communication line, and does not need to open cable trench, which makes the layout of the control room more simple and convenient.
4. The optical fiber control transmission system adopted in the scheme has been controlled and measured in the domestic high-voltage test equipment The optical fiber connection between the equipment and the high voltage main equipment effectively solves the harm of the ground potential elevation encountered in the high voltage test to the measurement and control system, eliminates the electromagnetic interference caused by the control lead, and improves the reliability of the system, especially in the cut wave and steep wave impact test.
5. The operation interface of the HT-2008 control and measurement system adopted in the scheme fully considers the customary characteristics of high pressure test, which is simple and clear. Dry test personnel operation. The system has designed a special program operation screen, which is convenient for full wave and cut wave test of transformer, greatly simplifies the operation of test personnel, and can effectively prevent human error.
6, this set of impulse voltage generator test system adopts the technology, good technology and high-quality raw materials, can ensure long-term use, operating life is more than 20 years. The usual operating costs are also very low.
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