Microcomputer Relay Protection Tester
Microcomputer Relay Protection Tester is a new intelligent testing instrument. The previous relay protection test tools were mainly composed of voltage regulators and phase shifters, which were bulky and had low accuracy, 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, with power amplifier tubes operating in the amplification region, prone to damage over time, and have narrow dynamic range and low accuracy. The other uses switching power supplies and digital power amplifiers, which are small in size, light in weight, and high in efficiency, representing the development direction of relay protection testers. It can test various types of voltage, current, frequency, power, impedance, harmonic, differential, and synchronism relays manually or automatically, simulate various fault types for distance and zero-sequence protection device calibration and complete group tests of protection devices, automatically scan the ratio restraint curves of microcomputer and digital transformer and generator-transformer differential protection, and has GPS triggering function. The microcomputer relay protection test device 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 test devices by applying the latest technological achievements. The relay protection test device 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 reliability and efficiency of power system operation and management, the testing work of relay protection personnel has become more frequent and complex. 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 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 implemented by fully utilizing 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 standalone 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, built-in TFT true color LCD display and embedded microcomputer keyboard. It can be operated independently as a standalone unit or connected to a laptop computer. It has powerful operation functions, small size, and high accuracy. 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.
