If the current transformer measurement is abnormal, try this practical diagnostic method Introduction In order to make full use of the alarm information in the operation of power system components, this paper makes full use of conditional probability tools, taking parallel high-voltage reactors as an example, to establish the correlation between electrical analog measurement results […]

Design and application of metering low voltage current transformer Overview Metering type low voltage current transformer is a current transformer that provides current to electric energy meters and other similar electrical appliances. It is widely used in the measurement of current in low voltage distribution systems. The main accuracy levels (given for current transformers) are: […]

Common fault analysis and maintenance methods of current transformer As an important device in the system, current plays a role in measurement and protection. Once a fault occurs, it is very easy for the power system to fail to operate normally and the power supply function to lose its function. If these faults cannot be […]

Research on high-precision micro-flux current transformer   Abstract: The development of high-precision micro current transformers is a common topic of concern in the current power instrumentation industry. This project uses the micro-flux principle, passive error compensation method, and double-core double-winding structure to manufacture high-precision micro current transformers; using micro-flux within the allowable error range is […]

Research on the impact of electric vehicle charging on residential area distribution network With the continuous development and progress of electric vehicle related technologies, electric vehicles will surely achieve large-scale development  . However, a large number of electric vehicle charging will have an impact on distribution network equipment, thereby affecting the safety and economic operation […]

Research on Fault Current Controller of DC Microgrid With the increasing consumption of fossil energy and increasingly severe environmental problems, methods to adjust the energy structure through the development and utilization of renewable energy sources such as wind power and photovoltaics are being studied and applied by more and more scientific research institutions and groups. […]

Analysis on the application of current transformer in low voltage flexible DC microgrid Low-voltage flexible DC microgrids are bridges between DC-specific devices such as energy storage, electric vehicles, and distributed energy and medium-voltage DC distribution networks, and are an important part of energy Internet technology. With the development of low-voltage flexible DC technology and the […]

Research on overcurrent protection of DC microgrid based on fault current control Introduction Against the backdrop of the increasing depletion of fossil energy and the increasingly serious environmental pollution problem, the development and utilization of clean energy has attracted more and more attention. The access of clean energy to the distribution network will have a […]

Working principle and charging process of on-board charger for new energy vehicles New energy electric vehicle chargers are divided into two categories: on-board chargers and off-board chargers, depending on whether they are fixed on the car. On-Board Charger (OBC) is one of the main products of Dilong New Energy Technology Hebei Co., Ltd. It uses […]

Selection of residual current protector in charging pile     With the explosive growth of the number of new energy vehicles in the past two years, the construction scale of its supporting facilities charging piles has also expanded. In the seven years from 2010 to 2017, the number of charging piles in China has increased […]

How Type B residual current devices protect against shock  This audio was created using Microsoft Azure Speech Services     Shocks from contact with electrical conductors continue to occur every year in every country. For example, in the UK, the Health and Safety Executive documented that “Each year about 1000 accidents at work involving electric shock […]

Key considerations in designing a car charger     After switching to electric vehicles (EVs), the biggest change drivers may feel is the way they recharge differently. Specifically, they no longer need to drive to a gas station, but must find an available charging point. Although the number of public charging points is increasing rapidly, […]