继电保护测试仪时间测量精度检测校准装置研制及性能分析

为推进智能变电站建设，针对继电保护测试仪时间测量精度缺少验证手段导致的保护测控等关键二次设备应用和推广受影响的问题，研制了一种针对继电保护测试仪时间测量精度开展检测校准的装置。首先，分析现有方法的弊端，提出继电保护测试仪时间测量精度检测校准的整体思路，明确设计方案。其次，利用输入数据精确时间标定和精准时间的输出控制技术，实现SV、GOOSE和硬接点信号的高精度采集和输出。最后，基于动作事件生成及精确时间戳实现电力系统常见动作时间的高精度、宽量程模拟，作为继电保护测试仪测量的基准误差。试验及工程验证结果表明，新研制装置的时标精度、动作时间模拟和抗干扰能力满足标准要求和应用需求，有效解决了继电保护测试仪时间测量精度无法检测校准的行业难题，提高了检测校准能力和效率。

Development and performance analysis of a time measurement accuracy test and calibration device for a relay protection tester

In promoting the construction of a smart substation, there is a problem that the application and popularization of key secondary equipment such as protection and monitoring device are affected by the lack of verification means for the time measurement accuracy of relay protection tester. Therefore a device for testing and calibrating the time measurement accuracy is developed. First, the disadvantages of the existing methods are analyzed, the overall idea of the time measurement accuracy test and calibration for the relay protection tester is proposed, and a design scheme is completed. Secondly, based on accurate time calibration of input data, precise time output control technology, high-precision acquisition and output of SV, a GOOSE and hard output signal are achieved. Finally, based on action event generation and accurate timestamp technology, a high-precision and wide-range simulation of common action time of a power system are realized. This is the reference error measured by the protective relay test, as the reference error of the tester. Test and engineering verification results show that the time accuracy, action time simulation and anti-interference ability of the latest developed device meet the standard requirements and application requirements. They effectively solve the industry problem that the time measurement accuracy of the relay protection tester cannot be tested and calibrated, and improve the test and calibration ability and efficiency. This work is supported by the National Natural Science Foundation of China (No. U1804252).