Hamamatsu Photonics K K, Nanjing Guanglu Electronics Co. and China Electric Power Research Institute | Date: 2013-11-26
A single-core optical transceiver is an optical transceiver for transmitting or receiving an optical signal through a single optical fiber. The single-core optical transceiver has a light emitting device for transmitting the optical signal and a light receiving device for receiving the optical signal. The light emitting device is an LED configured including a sapphire substrate arranged on a light receiving surface of the light receiving device so as to be coaxial with the light receiving surface, and a nitride semiconductor layer laid on the sapphire substrate. Even with the light emitting device being arranged on the light receiving surface of the light receiving device, the optical signal from the optical fiber can be received on the entire area of the light receiving surface, so as to adequately improve the light sensitivity.
State Grid Corporation of China, State Grid Hubei Electrical Power Research Institute, China Electric Power Research Institute and Xi'an Jiaotong University | Date: 2013-11-14
A testing device for propagation characteristic of electromagnetic wave in gas insulated switchgear includes an ultrahigh frequency signal generator, a GIS testing chamber, an emitting antenna and a receiving antenna which are provided inside the GIS testing chamber. A detachable disc insulator is provided between the emitting antenna and the receiving antenna. Both terminals of a GIS testing chamber are sealed by polyurethane wave-absorbing sponge; the ultrahigh frequency signal generator is connected with the emitting antenna, and the receiving antenna is connected with a oscilloscope. A guide rod which is fixed by the disc insulator is provided in the GIS testing chamber. The present invention is capable of achieving testing propagation characteristic of partial discharge ultrahigh frequency electromagnetic wave signal of a gas insulated switchgear in a laboratory, so as to master attenuation characteristics of the partial discharge ultrahigh frequency electromagnetic wave signal, and lay a laboratory foundation for accurate detection of the partial discharge of the gas insulated switchgear by field use of an ultrahigh-frequency method.
China Electric Power Research Institute, State Grid Corporation of China and Solar Power Limited | Date: 2012-12-11
The invention provides a lithium battery and redox flow battery energy storage systems hybrid energy storage power station real-time power distribution method and system. The system comprises a communication module, a data storage and management module, a gross power coordination control module and a real-time power distribution module. The said method and system not only can complete the real-time distribution of each battery energy storage units in the battery energy storage station, but also the aims of effective control and distribution of the lithium-liquid flow cell combined energy storage power station and aims of effective control and distribution of the lithium-flow flow joint energy storage power station real-time power can be achieved.
State Grid Corporation of China and China Electric Power Research Institute | Date: 2013-08-07
The present invention provides a kind of high voltage direct current broadband domain corona current measurement system, including the sampling resistance sensor, the UHV local end measurement unit, the optical fiber transmission unit, the safe location measurement unit and the upper monitor; The sampling resistance sensor samples the corona current signal of the HVDC line, and converts the corona current signal to the voltage signal, the UHV local end measurement unit collects the voltage signal, and obtains the optical signal by photoelectric conversion, the optical signal transforms to the safe location measurement unit by the optical fiber transmission unit, the safe location measurement unit converts the optical signal to the voltage signal, the host computer performs processing, storing and displaying with the voltage signal. The present invention has a wide range of measuring frequency, strong ability of anti-electromagnetic interference and other advantages, also can running in long-term stable status under the condition of the UHV DC and all kinds of bad natures, this provides effective technological means for further research on the character of the UHVDC corona.
State Grid Corporation of China and China Electric Power Research Institute | Date: 2013-05-02
The present invention provides an online monitoring circuit of the series compensation spark gap divider return circuit, said series compensation spark gap divider return circuit includes voltage equalization link and the voltage sampling link; Said voltage link includes the capacitor C which series said voltage equalization link; Said online monitoring circuit includes the voltage sampling input module, series compensation current input module and the compare module; Said sampling voltage input module after amplified the voltage of the two ends of the series capacitor C converts it into direct current signal U