摘要：【中文】本发明公开了一种多电平功率放大系统及其PWM控制信号产生方法，属于电力电子、无线通讯技术领域，包括主控机箱、功率模块和级联变压器；主控机箱用于根据外部通讯设备传递的控制信号进行多电平调制，产生各功率单元对应的PWM控制信号；主控机箱还用于监控功率模块的Fault信号和电压电流信号是否正常，并向Fault信号和电压电流信号正常的功率单元发送对应的PWM控制信号；功率模块用于测量Fault信号和电压电流信号；接收到PWM控制信号的功率单元还用于产生对应的交流方波；级联变压器用于将交流电压方波串联后输出。本发明解决了传统迭代方法在求解电平数较多的消谐方程时，迭代速度慢或者不收敛的问题。 【EN】The invention discloses a multi-level power amplification system and a PWM control signal generation method thereof, belonging to the technical field of power electronics and wireless communication and comprising a main control case, a power module and a cascade transformer; the main control case is used for carrying out multi-level modulation according to control signals transmitted by external communication equipment and generating PWM control signals corresponding to each power unit; the main control case is also used for monitoring whether the Fault signal and the voltage and current signal of the power module are normal or not and sending corresponding PWM control signals to the power unit with the normal Fault signal and the voltage and current signal; the power module is used for measuring a Fault signal and a voltage current signal; the power unit receiving the PWM control signal is also used for generating a corresponding alternating-current square wave; the cascade transformer is used for outputting the alternating voltage square waves after the alternating voltage square waves are connected in series. The method solves the problem that the traditional iteration method is slow in iteration speed or not convergent when solving the harmonic elimination equation with more levels.

摘要：【中文】本发明公开了一种多电平功率放大器的死区控制方法及系统，通过SHEPWM技术计算得到N个方波逆变器的开通角；通过移相调制，利用开通角得到任一个方波逆变器的四个开关管的导通波形；从开关管的导通波形中，确定死区插入时刻，记为θ₁、θ₂、θ₃、θ₄，其中，θ₁、θ₃为第一桥臂死区插入时刻，θ₂、θ₄为第二桥臂死区插入时刻；在θ₁‑Δθ，θ₂‑Δθ，θ₃‑Δθ，θ₄‑Δθ时刻对输出电流进行检测，根据电流方向判断死区的插入方式，得到插入死区的开关管的导通波形。相比于传统的固定死区插入方案会引入不同程度的低次谐波，本发明采用灵活的死区在线插入方案，可以在任意负载电流的情况下，在输出电流侧完全不引入额外的低次谐波，使得输出波形能够很好的符合理想波形。 【EN】The invention discloses a dead zone control method and a system of a multi-level power amplifier, wherein the turn-on angles of N square wave inverters are obtained through calculation by a SHEPWM (short pulse width modulation) technology; conducting waveforms of four switching tubes of any square wave inverter are obtained by phase shift modulation and utilizing a conducting angle; determining dead zone insertion time from the conduction waveform of the switching tube, and recording the dead zone insertion time as theta₁、θ₂、θ₃、θ₄Wherein, theta₁、θ₃For the first bridge arm dead zone insertion time, θ₂、θ₄Inserting time for the dead zone of the second bridge arm; at theta₁‑Δθ，θ₂‑Δθ，θ₃‑Δθ，θ₄And detecting the output current at the time of delta theta, and judging the insertion mode of the dead zone according to the current direction to obtain the conduction waveform of the switching tube inserted into the dead zone. Compared with the traditional fixed dead zone insertion scheme, the invention introduces low-order harmonics with different degrees, adopts the flexible dead zone online insertion scheme, and can completely not introduce extra low-order harmonics on the output current side under the condition of any load current, so that the output waveform can well accord with the ideal waveform.

摘要：【中文】本公开公开了一种能量路由器的交流端口及能量路由器，属于电能存储领域。包括逆变电路、谐波电流抑制电路和谐波电流控制电路；谐波电流抑制电路包括第一开关器件、第二开关器件、电感和电容，第一开关器件和第二开关器件串联之后与直流母线并联，电感和电容串联之后与第二开关器件并联；谐波电流控制电路包括依次连接的第一减法器、第一比例积分控制器、第一正弦脉宽调制器和第一反相器，第一减法器的两个输入端分别接入谐波电流抑制电路的输入电流、以及谐波电流抑制电路的输入电流中的谐波电流，第一正弦脉宽调制器的输出端与第一开关器件的控制端连接，第一反相器的输出端与第二开关器件的控制端连接。本公开对直流母线无谐波影响。 【EN】The utility model discloses an energy router's interchange port and energy router belongs to the electric energy storage field. The harmonic current suppression circuit comprises an inverter circuit, a harmonic current suppression circuit and a harmonic current control circuit; the harmonic current suppression circuit comprises a first switch device, a second switch device, an inductor and a capacitor, wherein the first switch device and the second switch device are connected in series and then connected in parallel with the direct current bus, and the inductor and the capacitor are connected in series and then connected in parallel with the second switch device; the harmonic current control circuit comprises a first subtracter, a first proportional integral controller, a first sine pulse width modulator and a first phase inverter which are sequentially connected, wherein two input ends of the first subtracter are respectively connected with the input current of the harmonic current suppression circuit and the harmonic current in the input current of the harmonic current suppression circuit, the output end of the first sine pulse width modulator is connected with the control end of the first switching device, and the output end of the first phase inverter is connected with the control end of the second switching device. The present disclosure has no harmonic effect on the dc bus.

摘要：【中文】本发明提供了一种井间动态连通强弱的检测方法。检测方法包括以下步骤：步骤10：建立关于束缚水与不流动孔隙效应表征模型、剩余油效应表征模型、双重介质效应的微观渗流表征模型；步骤20：建立可动水的宏观渗流模型；步骤30：建立示踪剂回采率模型，并根据可动水的宏观渗流模型和束缚水与不流动孔隙效应表征模型、剩余油效应表征模型、双重介质效应的微观渗流表征模型确定出水循环比例参数，根据水循环比例参数确定出油藏内至少一对注采井之间的连通强度。根据水循环比例参数确定出油藏内至少一对注采井之间的连通强度，能够很好的确定相邻井间的连通强弱的问题。采用该方法能够提高检测井间的连通强度结果的可靠性和准确性。 【EN】The invention provides a method for detecting the dynamic communication strength between wells. The detection method comprises the following steps: step 10: establishing a characterization model of the effect of the bound water and the stagnant pore, a characterization model of the effect of the residual oil and a microscopic seepage characterization model of the double medium effect; step 20: establishing a macroscopic seepage model of movable water; step 30: establishing a tracer recovery rate model, determining a water circulation ratio parameter according to a macroscopic seepage model of movable water, a characterization model of the effect of bound water and non-flowing pores, a characterization model of the effect of residual oil and a microscopic seepage characterization model of double medium effect, and determining the communication strength between at least one pair of injection and production wells in the oil reservoir according to the water circulation ratio parameter. The communication strength between at least one pair of injection and production wells in the oil reservoir is determined according to the water circulation ratio parameters, and the communication strength between adjacent wells can be well determined. By adopting the method, the reliability and the accuracy of the result of the communication strength between the detection wells can be improved.

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.