Beidou Timing Device (Beidou Satellite Timing Device) Technical Solution-Jingzhun Electronic Technology
Application of Beidou Timekeeper (Beidou Satellite Timekeeper) Technical Solution
Anhui Jingzhun Electronic Technology specializes in the development and production of Beidou timing devices and satellite timing devices
1. Why use GPS / Beidou clock synchronization device?
Due to historical reasons, the clock source of the current time synchronization system in China's power industry mostly uses the US GPS system as the main clock source. At present, GPS is a system shared by the US military and civilians, which is open to the whole world.
The GPS currently used in our country belongs to the American signal received for free. Nevertheless, Americans do not promise to guarantee your use. This poses a security problem. For example, the power system uses the GPS of the United States as the main clock source. This poses a major security risk. In the event of an emergency, such as war, the United States will shut down or adjust the GPS signal, which will bring our power To have a big impact.
How to establish a perfect time synchronization mechanism, and at the same time make the power system time synchronization system not controlled by other countries, is a major issue facing the power industry. The GPS / Beidou clock synchronization device came into being in this situation. The production and operation of China's power system are safe. The GPS / Beidou dual-mode clock synchronization device simultaneously receives the standard time information of two different satellite systems, GPS and Beidou. When one of the systems receives a fault or the signal is abnormal, it can automatically switch to another. A timing system guarantees the stable reception of upstream time sources. Since Beidou Satellite Navigation and Positioning System is independently developed by China, it is more secure than GPS systems in terms of safety.
2. To help you choose the right clock synchronization device
. At present, different types of equipment coexist in the clock synchronization application. Through the investigation of some technical data, here are the main characteristics of the various equipments that are generally recognized.
2.1 It can be compatible with both GPS and Beidou satellite time signals. Any satellite time signal can be set as the main time source. When the main time source fails or the signal is abnormal, the system automatically recognizes the error code and switches to the standby time signal Source receiving, the switching time is less than 50MS, and there is a buzzer alarm during switching, without manual intervention. Some equipment cannot be automatically switched and requires manual intervention. Such equipment is not suitable for the power industry with more and more automation.
2.2 Introduction of HR-901GB system: Modular combination is adopted. The main advantage is that it can ensure that PPS / PPM / PPH, IRIG-B interface, RS232 / 422/485, NTP, PTP, etc. can be arbitrarily configured for different application occasions. Type and number of interfaces. 
2.3 HR-901GB system introduction: Does the main control board and power supply system use dual backup mode? Does it support the self-preservation accuracy of the clock signal in the satellite lost state within 24 hours, the error is less than 10MS, and is it supported when the external power supply of the entire system is interrupted 24 hours automatic battery life. The above design method can ensure the stable and safe output of the clock signal reference to the maximum extent, and can also guarantee the normal operation of the system under extreme conditions.
2.4 All plug-ins support hot swapping. The advantage of this function is that it is not necessary to turn off the power of the entire clock system during maintenance and replacement of some of the devices. The entire system can still operate stably during maintenance or replacement of accessories.
The test example
was applied to Xinjiang Turpan Electric Power Bureau and Xinjiang Aksu Electric Power Company on May 5, 2008. It is mainly used for clock synchronization and unified scheduling of the entire station. It has been unanimously praised, provides help for scientific research topics, and provides a strong reference basis for post-mortem analysis of equipment failures and judgment of power grid breakpoint failures.
On August 25, 2009, through strict equipment insulation performance, humidity resistance performance, mechanical performance, environmental performance, electromagnetic compatibility, reliability, maintainability, and safety testing, the Indian IMFA 30MW power plant officially selected the GPS clock synchronization system device ( The Beidou expansion interface is reserved), and the reference reference for the fault recorder and the clock synchronization of each unit is successfully obtained.
On October 20, 2010, Hunan Shaoshan Electric Power Co., Ltd. selected this series (clock synchronization system) as the reference signal source for clock synchronization of the whole station through a comprehensive comparison of product cost performance. .
According to the comparison of the inspection team leader in Shaoshan, the accuracy of our company ’s instruments is the same as that of the original imported clock synchronization device he originally used (the original purchase was 400,000). The cost performance of our instrument is more advantageous.
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Original link: https://blog.csdn.net/weixin_44990608/article/details/105551533