62results about How to "Convenient on-site debugging" patented technology

The invention discloses an electronic voltage transformer using data fusion technology and an error calibration method thereof. The error calibration method comprises the following steps of: acquiring a secondary measured voltage by using a capacitive voltage divider and a sampling resistor R, accessing the voltage to a data acquisition processor for sampling, and tracing the frequency of the voltage; accessing a signal of a temperature sensor to the data acquisition processor, and computing the temperatures of measuring points; dynamically computing a divided voltage ratio of the capacitive voltage divider according to the temperature variation of the measuring points by using data acquisition device processing software so as to modify a transformation ratio error of the transformer; dynamically computing phase deviation according to signal frequency variation by using the data acquisition device processing software so as to modify a phase error; and outputting a digital sampling value through an optical fiber interface. The device is simple in structure, safe and practical; errors caused by manufacturing factors, temperature and signal acquisition circuits and the like can be effectively modified and restrained; and the measuring accuracy, temperature stability and transient performance of the electronic voltage transformer according to a capacitive voltage division principle are improved.

The invention discloses a device for efficiently compensating three-phase unbalanced loads and reactive power, which includes: three-phase current and three-phase voltage sampling circuits of a three-phase power system, a power controller and different three-phase compensation unit. It is characterized in that the power controller controls each single-phase switch in the three-phase compensation unit with different topological structures separately according to the sampling results, so that it can realize both common compensation and single compensation; it can not only compensate reactive power, but also balance Active power; it can be used as both static compensation and dynamic compensation; it can not only adjust the ability of three-phase current, but also adjust the three-phase unbalanced voltage. The invention is suitable for the transformation and updating of the existing reactive power compensation device of the three-phase four-wire unbalanced load power system.

The invention provides a monitoring device of point-to-point communication equipment and a monitoring system having the monitoring device of the point-to-point communication equipment. The device comprises a first equipment interface which is connected with the communication interface of first communication equipment; a second equipment interface which is connected with the first equipment interface and the communication interface of second communication equipment; a data sampling module which samples the communication data between the first equipment interface and the second equipment interface; a data processing module which is connected with the data sampling module and processes the sampled communication data according to a preset communication protocol; and a communication module which is connected with the data processing module and external monitoring equipment and outputs the processed communication data to the monitoring equipment. The communication data of both sides of the point-to-point communication equipment are monitored through hardware and the monitored communication data are outputted so that modification of the software level and / or the hardware level can be avoided, the change of the communication data of the hardware level can be monitored and thus onsite debugging of the point-to-point communication equipment can be greatly facilitated.

The invention provides a method for realizing a position sensor interface supporting various sensor communication protocols. The method can realize a function of supporting a TAMAGAWA interface data transmission protocol, a Biss interface data transmission protocol, an SSI interface data transmission protocol and an EnDat interface data transmission protocol and intelligently identifying any one of the four sensor transmission protocols. The method brings great convenience to field debugging of extensive customers and field technicians and has very high practicability.