Abstract: Disclosed is an optimal power flow-based hierarchical control method for a distributed energy storage system (ESS), where the method divides control of an energy storage cluster into three layers, performs primary and secondary control to realize intra-cluster control, and performs tertiary control to realize inter-cluster control. In the primary control, droop coefficients are set to realize intra-cluster basic power distribution. In the secondary control, a frequency/voltage shift and uneven power distribution that are caused by a droop are compensated for based on a consistency algorithm. In the tertiary control, a central controller is set, a solution of an optimal power flow is calculated and delivered to each cluster as a control signal, and the control signal is tracked in real time through the secondary control and the primary control. The method adjusts a reference voltage of each energy storage cluster without requiring a common bus.

Abstract: Disclosed is an optimal power flow-based hierarchical control method for a distributed energy storage system (ESS), where the method divides control of an energy storage cluster into three layers, performs primary and secondary control to realize intra-cluster control, and performs tertiary control to realize inter-cluster control. In the primary control, droop coefficients are set to realize intra-cluster basic power distribution. In the secondary control, a frequency/voltage shift and uneven power distribution that are caused by a droop are compensated for based on a consistency algorithm. In the tertiary control, a central controller is set, a solution of an optimal power flow is calculated and delivered to each cluster as a control signal, and the control signal is tracked in real time through the secondary control and the primary control. The method adjusts a reference voltage of each energy storage cluster without requiring a common bus.

Abstract: Disclosed is a carrier aggregation device. The device comprises: a first transceiver antenna, a second transceiver antenna, a first radio frequency front end, a second radio frequency front end, and a radio frequency transceiver chip. A signal received by the first transceiver antenna is divided into a high frequency signal, an intermediate frequency signal and a low frequency signal through the first radio frequency front end, and the three signals separately enter the radio frequency transceiver chip. A signal received by the second transceiver antenna is divided into high frequency signal, an intermediate frequency signal and a low frequency signal through the second radio frequency front end, and the three signals separately enter the radio frequency transceiver chip.

Abstract: Disclosed is a multimode receiver, comprising: an antenna system configured to receive a signal sent by a base station and select a receiving circuit front end according to the frequency band of the signal; more than one receiving circuit front end configured to perform down-conversion frequency processing on a signal sent by the antenna system and send the processed signal to an I/Q demodulator; the I/Q demodulator configured to demodulate the signal sent by the receiving circuit front ends and send the demodulated signal to a baseband unit; and the baseband unit configured to decode the demodulated signal. Disclosed is a receiving method for a multimode receiver. By adopting the present invention, one set of receiving circuit front ends can be utilized for signals of the same frequency band and different modes, decreasing the number of radio-frequency chips, and lowering the cost.

Abstract: Disclosed is a multimode receiver, comprising: an antenna system configured to receive a signal sent by a base station and select a receiving circuit front end according to the frequency band of the signal; more than one receiving circuit front end configured to perform down-conversion frequency processing on a signal sent by the antenna system and send the processed signal to an I/Q demodulator; the I/Q demodulator configured to demodulate the signal sent by the receiving circuit front ends and send the demodulated signal to a baseband unit; and the baseband unit configured to decode the demodulated signal. Disclosed is a receiving method for a multimode receiver. By adopting the present invention, one set of receiving circuit front ends can be utilized for signals of the same frequency band and different modes, decreasing the number of radio-frequency chips, and lowering the cost.