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

提出了一种适用于电力系统故障检测与控制的低成本GPS时间传感器。GPS提供了一个高度精确的时间参考，使数据在变电站和控制中心之间同步到100纳秒内。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点的相对时间，故障可以在网格中被隔离到100米的精度。相位角测量可以确定到40微弧度的精度。目前，适用于电力系统控制的最便宜的GPS授时接收器成本超过10,000美元。在整个电网的成千上万个变电站安装这种设备将非常昂贵。在此基础上，提出了开发一种低成本的精确时间同步GPS传感器用于电力系统监测。该传感器将提供高度可靠的时间参考，精确到100纳秒，成本不到1500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. ***