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Intelligent flexible power device and control laboratory in the operation and control of flexible power grid structures、Carry out work on experimental methods for power electronic flexible equipment and the research and development and testing of new power devices。Committed to promoting the development of smart grid primary flexible equipment and new power electronic devices，Improve the reliability of equipment and power grid operation。Laboratory construction open control platform，For comprehensive power quality management device、Energy storage and new energy power generation systems and grid fault protection devices can achieve friendly access，With a variety of communication transmission、Data collection and fault recording functions。The laboratory actively carries out research and development work on new power devices based on the actual needs of the power grid，A single-phase ground fault line selection protection device based on the virtual energy method has been developed、Single-core cable shield voltage damping relief and circulation monitoring device、Reactive power compensation switching device based on fast switching and many other intelligent power devices。Undertake scientific and technological projects at the headquarters of State Grid Corporation of China、Several science and technology projects of Shandong Iron and Steel Co., Ltd. and several science and technology projects of State Grid Shandong Electric Power Company。

2. Laboratory function

Lab passed10kVTransformer, implementation10kVStructural simulation of true distribution network, included10kVLine simulation、Reactive power compensation equipment、Grounding transformer、Arc suppression coil and control switch etc.。Currently availableSingle-phase ground fault simulation experiment、Equipment overvoltage experiment、Reactive power compensation switching experiment、Ability to accurately compensate for neutral point experiments。

（1) Distribution network fault simulation and fault protection experiment

The distribution network equipment is complex、The structure is changeable and faults occur frequently，Simulating distribution network faults in the laboratory is of great significance for developing fault protection devices。The laboratory has distribution network to ground overvoltageAnd single-phase ground fault simulation experiment,10kVThe line cabinet builds a π-type equivalent line based on the actual parameters of the distribution network line，Responsible for controlling line switching、Line unbalance simulation、Single-phase ground fault, etc.。

                                                                                                （a）10kVDistribution network line ground fault diagram (b)10kVLine equivalent simulation diagram

（c) Single-phase ground fault judgment based on primary and secondary fusion equipment

Picture1 Distribution network fault simulation and fault protection experiment

（2) Reactive power compensation and fast switching experiment

Reactive power compensation can improve the power factor of the power grid，Reduce power grid losses，Improve power supply efficiency。The switching of traditional reactive power compensation equipment in the distribution network can easily cause equipment to ground overvoltage，causing equipment insulation breakdown、Damaged，New reactive power compensation switching device，Using distribution network vacuum fast switching with precise switching compensation control strategy，Can suppress the impact caused by switching，Achieving precise switching compensation，Greatly improve the safety of reactive power compensation equipment。

Picture2 Reactive power compensation and fast switching experiment

（3) Neutral point compensation and overvoltage suppression experiment

Distribution networks with small current grounding systems often cause equipment damage due to overvoltage to the ground，Precise compensation through neutral point，Can reduce equipment overvoltage to ground。Study on the unbalanced voltage of three phases to ground in ungrounded systems and arc suppression coil grounded systems、Arc overvoltage compensation control，Develop neutral point compensation equipment，Achieve conversions in various scenarios according to different working conditions，It is of great significance to the safe operation of primary equipment in the distribution network。

Picture3 Arc suppression coil grounding and neutral point compensation

3. Main laboratory equipment

 Picture4 Lab platform integrated controller

Picture5 Laboratory operation control cabinet