On September 25, 2019,Hunan Luanhai Electric Technology Co., Ltd. developed three new products successfullyPassed the new product appraisal organized by Hunan Machinery Industry Association。Committee of expertsLiu Guang, Hunan University晔The professor serves as chairman，Hunan Electric Power Co., Ltd. electrical engineering Institute Wang Xiaofei senior as deputy chairman，Prof. Li Maojun of Changsha University of Science and Technology, Mr. Gan Shengliang of Equipment Department of Hunan Electric Power Co., LTD., Mr. Liu Hong of Hunan Xiangdian Test and Research Institute Co., LTD., Mr. Wang Wei of Changsha Power Supply Company, Mr. Li Jun of Wisheng Information Technology Co., LTD., are members of the committee。

  The expert committee listened to the work summary report made by the undertaking unit, reviewed relevant materials, visited the production site, questioned and discussed，At the same time, from the "degree of technological innovation, the advanced degree of technical and economic indicators, the degree of technical difficulty and complexity, the reproducibility and maturity of technology, the role of technological innovation in promoting industrial scientific and technological progress and improving the core competitiveness of the market, economic and social benefits" and other six aspectsThree new products developed by Hunan Luanhai Electric Technology Co., Ltd. were identified。

  After identification," LHCM-500-II distribution network neutral point system parameters comprehensive tester"Product technology in the domestic leading level, “LH-XHJY-Z300 arc suppression coil controller inspection device"Product technology has reached the domestic advanced level and filled the domestic gap,“LH-CAS-I capacitor current tester calibration device”Product technology in the domestic leading levelThe following is the product introduction:

  “LHCM-500-II distribution network neutral point system parameters comprehensive tester”It is a neutral point parameter charging tester for distribution network, which is used to measure capacitive current, arc suppression coil inductive current and other parameters of 35KV and below distribution (feed) grid system, so as to check and find anomalies of neutral point equipment and system in time and eliminate hidden trouble。The features of this instrument are as follows: (1) It is the first to measure the capacitance current of the system while realizing the multi-parameter measurement of the inductance value of the arc suppression coil, the zero sequence impedance of the grounding transformer and the damping resistance of the system;The measurement range is large and the accuracy is high, reaching 2 in the full range of 500A.Lv.0;③ Measurement can be performed at the neutral point of the grounding transformer or the neutral point of the compensation capacitor, and there is no need to enter the inductance parameter of the arc suppression coil in advance and exit the operation。
      “LH-CAS-I capacitor current tester calibration device”It is a device for calibrating "capacitance current tester"。It is suitable for all test instruments on the market today。The characteristics of the calibration device are: ① large range and high precision。Capacitance current range 5-500A, accuracy 0.Lv.5;② Many calibration interfaces, suitable for a wide range of equipment。With ground transformer neutral point, compensation capacitor neutral point, TV open triangle three tester calibration interface;③ The use of low environmental requirements，No need for special environment such as constant temperature and humidity;④ with easy to use calibrated interface，Easy standard traceability;⑤ with arc suppression coil access function，Suitable for calibration of measuring instruments with arc suppression coil;⑥ Has the function of system unbalanced voltage regulation。
      “LH-XHJY-Z300 arc suppression coil controller inspection deviceIt is a device for field testing the performance of the "arc suppression coil controller"。It is mainly composed of capacitor current module, power supply, abnormal signal source and measurement and control system。Its working principle: the tracking range of the arc suppression coil is selected by the capacitor current module, the measuring accuracy of the arc suppression coil controller is checked and the gear position of the arc suppression coil is regulated.The abnormal signal is sent out through the abnormal signal source to test the ability of the arc suppression coil controller to deal with system anomalies。Its characteristics are: ① Large capacitance current range, 5 ~ 300A, high accuracy, 0.5级。② Full tracking performance detection of arc suppression coil controller with capacitance current range can be set;(3) Provide the system neutral voltage, arc suppression coil current abnormal adjustable analog signal, detection controller abnormal processing function;The calibration interface of the device is provided with a calibration device with higher accuracy, which is easy to trace the standard and does not require disassembly and calibration。LH-XHJY-Z300 arc suppression coil controller inspection device is suitable for power system, large industrial and mining enterprises, scientific research institutes, etc。