摘要：【中文】本发明涉及一种基于隧穿磁阻的电流传感器，属于电力系统电流测量技术领域，包括开口磁环、隧穿磁阻传感芯片和信号调理电路，设置在开口磁环的气隙处的隧穿磁阻传感芯片与信号调理电路电连接，还包括输出电路，所述输出电路包括反馈线圈和采样电阻，所述反馈线圈绕制在开口磁环上，所述反馈线圈的其中一端连接所述信号调理电路的输出端，由信号调理电路的输出为反馈线圈供电，所述反馈线圈的另一端通过采样电阻接地，以采样电阻两端的电压作为电流传感器的输出，解决现有技术中的传感器对微弱电流测量精度低、效果差的问题。 【EN】The invention relates to a tunneling magnetic resistance-based current sensor, which belongs to the technical field of current measurement of an electric power system and comprises an opening magnetic ring, a tunneling magnetic resistance sensing chip and a signal conditioning circuit, wherein the tunneling magnetic resistance sensing chip arranged at an air gap of the opening magnetic ring is electrically connected with the signal conditioning circuit, the tunneling magnetic resistance sensing chip further comprises an output circuit, the output circuit comprises a feedback coil and a sampling resistor, the feedback coil is wound on the opening magnetic ring, one end of the feedback coil is connected with the output end of the signal conditioning circuit, the output of the signal conditioning circuit supplies power to the feedback coil, the other end of the feedback coil is grounded through the sampling resistor, and the voltage at two ends of the sampling resistor is used as the output of the current sensor, so that the problems of low measurement precision and poor effect of the sensor on weak current in the.

摘要：【中文】本发明涉及一种基于MMC的电力电子变压器系统及其分层控制系统架构，采用主+从+阀三层控制架构，MMC变换器中的每相桥臂对应有一个从控制器，专门实现该相桥臂的控制，实现同属于一相桥臂中子模块的同步控制，可靠保证同相桥臂中子模块的同步问题，提升系统控制可靠性。而且，控制分层比较合理，主控制器不再过度集中控制，控制任务有一部分由从控制器进行了分担，提升系统故障冗余度和控制可靠性。另外，各层控制功能分布明确，便于在系统控制各环节出故障时，能按层级快速查询检修，提升系统可靠性。还有就是，设立的从控制器能够进行阀控制器的外扩，可扩展性强，能减少后期开发的时间周期，保证系统能应用于更高电压大功率场合。 【EN】The invention relates to a power electronic transformer system based on MMC and a layered control system framework thereof, which adopt a three-layer control framework of a master valve, a slave valve and a slave valve, wherein each phase bridge arm in an MMC converter corresponds to one slave controller, the control of the phase bridge arm is specially realized, the synchronous control of neutron modules belonging to the same phase bridge arm is realized, the synchronous problem of the neutron modules of the same phase bridge arm is reliably ensured, and the control reliability of the system is improved. And moreover, the control layering is reasonable, the master controller does not excessively control in a centralized manner, and part of control tasks are shared by the slave controllers, so that the fault redundancy and the control reliability of the system are improved. In addition, the control functions of all layers are distributed clearly, so that when each link of the system control fails, the system can be inquired and maintained quickly according to the levels, and the reliability of the system is improved. And the set slave controller can expand the valve controller, has strong expandability, can reduce the time period of later development, and ensures that the system can be applied to occasions with higher voltage and high power.

摘要：【中文】本发明涉及一种基于隧穿磁阻的电流传感器及其参数确定方法，属于电力系统电流测量技术领域，将电流传感器中的磁环和绕制在磁环上的阻尼线圈的组合抽象为变压器，构建等效电路图；根据所述等效电路图中各元件的电磁特性，建立所述电流传感器的频率响应和传感器参数之间的关系，所述的传感器参数包括阻尼线圈的匝数和电阻值；根据待测电流幅值及频率范围调整所述阻尼线圈的匝数和电阻值，使所述电流传感器的输出频率响应下降区间处于待测电流幅值及频率范围内，以解决现有电流传感器由于参数设置不合理导致的测量不准确、测试效果差的问题。 【EN】The invention relates to a tunneling magnetic resistance-based current sensor and a parameter determination method thereof, belonging to the technical field of current measurement of a power system.A combination of a magnetic ring in the current sensor and a damping coil wound on the magnetic ring is abstracted into a transformer to construct an equivalent circuit diagram; establishing a relation between the frequency response of the current sensor and sensor parameters according to the electromagnetic characteristics of each element in the equivalent circuit diagram, wherein the sensor parameters comprise the number of turns and the resistance value of a damping coil; the number of turns and the resistance value of the damping coil are adjusted according to the amplitude and the frequency range of the current to be measured, so that the output frequency response descending interval of the current sensor is in the amplitude and the frequency range of the current to be measured, and the problems of inaccurate measurement and poor test effect caused by unreasonable parameter setting of the existing current sensor are solved.

摘要：【中文】本发明提出一种多端海上直流风电场系统故障保护区设置方法，并提出各保护区的保护对象和保护措施，包括：根据所述多端海上直流风电场系统的架构，将所述多端海上直流风电场系统设置为六个保护区：为风电场保护区、第一升压保护区、第二升压保护区、直流保护区、换流站保护区、交流系统保护区。所述多端海上直流风电场系统故障保护区设置方法将一个覆盖面积庞大的多端海上直流风电场系统设置为不同保护区并进行保护，提高了所述多端海上直流风电场系统的故障保护效果，便于对所述多端海上直流风电场系统进行故障保护方案配置。 【EN】The invention provides a method for setting fault protection areas of a multi-end offshore direct current wind power station system, and provides protection objects and protection measures of each protection area, wherein the method comprises the following steps: according to the framework of the multi-terminal offshore direct current wind power plant system, the multi-terminal offshore direct current wind power plant system is set to six protection areas: the protection area comprises a wind power plant protection area, a first boosting protection area, a second boosting protection area, a direct current protection area, a converter station protection area and an alternating current system protection area. According to the method for setting the fault protection area of the multi-terminal offshore direct current wind power plant system, the multi-terminal offshore direct current wind power plant system with a large coverage area is set to be different protection areas for protection, so that the fault protection effect of the multi-terminal offshore direct current wind power plant system is improved, and the fault protection scheme configuration of the multi-terminal offshore direct current wind power plant system is facilitated.

摘要：【中文】本发明提出一种多端海上直流风电场系统，所述系统包括三层结构：基础发电层、第一升压层和第二升压层，其中，所述基础发电层由风力发电单元及与所述发电单元连接的交直流变换器构成；所述第一升压层由直流变压器构成；所述第二升压层由海上换流站构成；所述交直流变换器连接至所述第一升压层中对应的直流变压器；所述第二层中直流变压器连接至所述第二升压层中海上换流站。本发明的多端海上直流风电场为大规模风电场建设提供了解决方案，且使用直流进行海上风电汇集使得风场内的电缆损耗减少，避免对电能进行多次的整流、逆变和升压，从而减少了系统投资且降低了海上平台的载荷。 【EN】The invention provides a multi-end offshore direct current wind power plant system, which comprises a three-layer structure: the system comprises a basic power generation layer, a first boosting layer and a second boosting layer, wherein the basic power generation layer consists of a wind power generation unit and an alternating current-direct current converter connected with the power generation unit; the first boosting layer is composed of a direct current transformer; the second booster layer is formed by an offshore converter station; the alternating current-direct current converter is connected to a corresponding direct current transformer in the first boosting layer; and the direct current transformer in the second layer is connected to the offshore converter station in the second boosting layer. The multi-end offshore direct current wind power station provides a solution for large-scale wind power station construction, and the direct current is used for offshore wind power collection, so that the cable loss in the wind power station is reduced, and the electric energy is prevented from being rectified, inverted and boosted for multiple times, so that the system investment is reduced, and the load of an offshore platform is reduced.