A Low Cost GPS Time Sensor for use in Power System Control

9302403布朗提出了一种适用于电力系统故障检测和控制的低成本全球定位系统时间传感器。GPS提供了高精度的时间基准，使变电站和控制中心之间的数据同步到100纳秒以内。精确时间在功率控制中的应用包括数据记录、继电器测试、故障隔离和相角测量。通过测量故障到达两个站的相对时间，可以将电网中的故障隔离到100米的精度。相角测量精度可达40微拉德。目前，适用于电力系统控制的最便宜的GPS定时接收器的价格超过1万美元。在整个电网数以万计的变电站安装这种设备将是非常昂贵的。在此背景下，研制了一种用于电力系统监测的低成本精密时间同步GPS传感器。建议的传感器将提供高度可靠的、精确到100纳秒的时间基准，成本不到1,500美元。***

9302403 Brown A low cost GPS Time sensor is proposed to be developed which will be suitable for power system fault detection and control. GPS provides a highly precise time reference which allows data to be synchronized to within 100 nanoseconds between substations and control centers. Applications of precise time in power control include data logging, relay testing, fault isolation and phase angle measurements. Failures can be isolated in a grid to a precision of 100 meters by measuring the relative time of arrival of a fault at two stations. Phase angle measurements can be determined to a precision of 40 micro-rad. Currently, the least expensive GPS timing receivers suitable for power system control cost over $10,000. Such equipment would be very expensive to install at tens of thousands of substations throughout the electric power grids. It is proposed under this effort to develop a low cost precise time synchronization GPS sensor for use in electrical power system monitoring. The proposed sensor will provide a highly reliable, time reference accurate to 100 nanoseconds for a cost of less than $1,500. ***