Six-Phase Microcomputer Relay Protection Tester
The Six-Phase Microcomputer Relay Protection Tester is a new type of intelligent testing instrument. The previous relay protection test tools were mainly composed of voltage regulators and phase shifters, which were bulky and had low precision, and could no longer meet the calibration work of modern microcomputer relay protection. With the continuous development of science and technology, microcomputer relay protection has been widely used in various fields such as line protection, main transformer differential protection, and excitation control. Comprehensive automation of substations has become the mainstream. Modern microcomputer relay protection testers can be divided into two forms: one uses traditional OCL power amplifiers, which are large in size and weigh about 25Kg, relatively bulky, and the power amplifier tubes operate in the amplification region, which is prone to damage over time, and have a narrow dynamic range and low precision. The other uses switching power supplies and digital power amplifiers, which are small in size, light in weight, and high in efficiency, and are the development direction of relay protection testers. It can test various types of voltage, current, frequency, power, impedance, harmonics, differential, synchronization, and other relays manually or automatically. It can simulate various fault types for distance and zero-sequence protection device calibration and complete group testing of protection devices. It can automatically scan the ratio braking curves of microcomputer and digital transformers and generator-transformer unit differential protection, and has GPS trigger function. The microcomputer relay protection tester is an important testing tool to ensure the safe and reliable operation of the power system. With the rapid development of computer technology, microelectronics technology, and power electronics technology, it is an inevitable trend of technological progress to continuously introduce new high-performance microcomputer relay protection testers by applying the latest technological achievements. The relay protection tester is an important testing tool to ensure the safe and reliable operation of the power system. With the continuous expansion of the scale of modern power systems and the increasing requirements for the reliability and efficiency of power system operation and management, the testing work of relay protection personnel has become more frequent and complex. In today's rapid development of computer technology, microelectronics technology, and power electronics technology, it is an inevitable trend of technological progress to continuously introduce new high-performance relay protection testers by applying the latest technological achievements, and it is also our responsibility given by the times. The relay protection tester is a new type of miniaturized microcomputer relay protection tester that fully utilizes modern advanced microelectronics technology and devices, based on the reference to the People's Republic of China electric power industry standard "Technical Conditions for Microcomputer Relay Protection Test Devices" (DL/T 624 ─ 1997). It adopts an advanced structure that can operate independently as a single unit or connect to other computers. The host has a built-in high-performance industrial computer and high-speed digital signal processor, true 16-bit DAC module, new modular high-fidelity high-power amplifier, and comes with a TFT true color LCD display and embedded microcomputer keyboard. It can operate independently as a single unit or connect to a laptop for operation. It has powerful operation functions, small size, and high precision. It not only has the superior performance and advanced functions of large testers, but also has the compactness, flexibility, easy operation, and high reliability of small testers.
1. It has standard six-phase current and six-phase voltage simultaneous output, with current 30A/phase and voltage 125V/phase. The six-phase current can be connected in parallel up to 180A. It can test various traditional relays and protection devices, and also conduct various tests on modern microcomputer protection, especially for transformer differential protection and standby power supply automatic switching devices, making the test more convenient and perfect.
2. Various technical indicators fully meet the standard of DL/T624-1997Technical Conditions for Microcomputer Relay Protection Test Devices issued by the Ministry of Electric Power.
3. Stand-alone operation, built-in high-performance industrial computer, main frequency 300--600MHz, memory 128M, hard disk 6--12G, running Windows XP operating system.
4. The first in the domestic industry to adopt imported brushed stainless steel panel and stainless steel keyboard, and also uses touch mouse, overcoming the shortcomings of trackball mouse that is inflexible and easy to damage, and selects an 8.4-inch TFT true color display with a resolution of 800×600, making the overall operation of the single unit convenient and durable.
5. The main control board adopts DSP+FPGA structure, 16-bit DAC output, which can generate a high-density sine wave of 2000 points per cycle for the fundamental wave, greatly improving the waveform quality and the accuracy of the tester.
6. The power amplifier adopts high-fidelity linear power amplifier, which ensures the accuracy of small currents and the stability of large currents.
7. It uses USB interface to directly communicate with PC, without any conversion cables, convenient to use.
8. It can be connected to a laptop for operation. The laptop and the industrial computer use the same software.
9. It has GPS synchronization test function. The device can be built-in GPS synchronization card (optional) connected to PC via RS232 port to realize synchronous remote test between two testers.
10. It is equipped with an independent dedicated DC auxiliary voltage source output, with output voltages of 110V (1A) and 220V (0.6A) respectively, to provide DC working power for relays or protection devices that need it.
11. It has software self-calibration function, avoiding the need to open the chassis to adjust potentiometers for calibration, thereby greatly improving the stability of accuracy.
