| The Power Grid synchronization clock calibration instrument is based on thesatellite when the time signal pair, serial synchronization equipment time informationcorrectness, time accuracy and stability verification method for the apparatus. Can beused as high precision and high stability of the time and frequency standard source, toprovide various types of time signal input and output interface, completed on timesignal analysis, statistics, comparison, record, storage.The paper on the power grid synchronization signal detection technology status,technology characteristics and development trend to undertake elaborating, thesynchronous clock source, time synchronization signal types and various signal coding,decoding method to carry on the preliminary discussion, proposed based on FPGAdigital signal processing technology of time synchronization signal detection solution.Through to the network synchronization clock calibration function demand analysis, onthe overall system architecture research, proposes based on the FPGA signal processingtechnology for all types of time signal accuracy test method, developed in line with thepower system automation equipment clock signal detection demand calibratorequipment.The paper uses the new technology of computer hardware platform and FPGAtechnology, developed a set of effective data acquisition and processing platform, toachieve the project’s function. In the hardware, the use of double CPU technique, one ofthe latest FPGA embedded soft core platform, data acquisition, data processing, anotherusing the latest embedded CPU, device management and other auxiliary function. In thesoftware, using the latest embedded software platform, ensure the operation speed andreliability.The key technology problem‘s solves ways as follows:(1) using multiple clock source least squares optimal screening method for clockcalibration instrument and UTC world phase;(2) the frequency standard source progressive tame algorithm to achieve highprecision punctual clock check gauge; (3) used hardware time stamp technology to realize high precision pulse timesynchronization signal detection;(4) using the time signal test channel time delay adaptive dynamic compensationtechnology.At present, power grid synchronization clock calibration instrument software isable to efficiently applied to power grid synchronization clock calibration system, eachfunction module and the indicators can achieve the anticipated target. |
