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CN-121984412-A - Communication base station energy management system and method based on wind-solar complementary power supply

CN121984412ACN 121984412 ACN121984412 ACN 121984412ACN-121984412-A

Abstract

The invention relates to the technical field of power supply and energy management of communication base stations, and particularly discloses a communication base station energy management system and method based on wind-solar complementary power supply. The system comprises a data acquisition module, an emission window identification module, a load power characteristic determination module, an energy demand calculation module, an energy supply decision module and an execution control module. The method comprises the steps of obtaining a transmitting state switching signal generated by a radio frequency transmitting link of a communication base station, determining the starting time and the duration of a transmitting window, predicting the load energy demand according to the starting time and the duration, combining wind-light output with energy storage state decision control quantity, performing feedforward control on a bidirectional direct current converter according to the control quantity before the starting time of the window, and performing closed-loop updating during the window. The invention can effectively ensure the direct current power supply quality during the radio frequency emission of the communication base station under the condition of wind and light output fluctuation, and avoid the radio frequency performance degradation caused by the transient drop of the power supply.

Inventors

  • SONG HONGJUN
  • MA CHUANXIANG

Assignees

  • 中邮建技术有限公司

Dates

Publication Date
20260505
Application Date
20260209

Claims (9)

  1. 1. Communication base station energy management system based on wind-solar complementary power supply, which is characterized in that the system comprises: The data acquisition module is used for acquiring the wind power output power of the wind power generation unit and the photovoltaic output power of the photovoltaic power generation unit, wherein the wind power output power and the photovoltaic output power jointly form real-time output power; The system comprises a transmitting window identification module, a window starting time and a window duration, wherein the transmitting window identification module is used for acquiring a transmitting state switching signal generated by a radio frequency transmitting link of a communication base station; the load power characteristic determining module is used for determining corresponding load power change characteristics from a preset load power change parameter set according to the window duration of the transmitting window; The energy demand calculation module is used for determining the energy demand of the direct current bus during the emission window according to the load power change characteristics, the bus voltage and the bus current; The energy supply decision module is used for determining a bus compensation energy range which can be provided by the energy storage unit during a transmitting window according to the real-time output power, the charge state parameter and the temperature parameter; And the execution control module is used for controlling the bidirectional direct current converter according to the discharge power control quantity and the duty ratio adjustment quantity of the energy storage unit in a preset time interval before the window starting moment of the emission window, updating the duty ratio adjustment quantity according to the deviation of the collected bus voltage relative to the target bus voltage during the emission window, and adjusting the output of the bidirectional direct current converter accordingly.
  2. 2. The wind-solar hybrid power supply-based communication base station energy management system according to claim 1, wherein the emission window identification module comprises: The system comprises a radio frequency state signal acquisition and preprocessing unit, a physical control signal processing unit, a signal processing unit and a signal processing unit, wherein the radio frequency state signal acquisition and preprocessing unit is used for acquiring a physical control electric signal from a designated hardware control node of a radio frequency transmission link of a communication base station, and the physical control electric signal represents that the radio frequency transmission link is switched from a receiving state to a transmitting state; the state switching event judging unit is used for carrying out threshold comparison and pulse width judgment on the processed electric signals, and identifying and obtaining effective state switching events from low level to high level; And the transmitting state switching signal generating unit is used for superposing the signal edge time with a preset hardware link establishment delay to obtain transmitting state switching time, and correlating the transmitting state switching time with a state switching event to generate a transmitting state switching signal.
  3. 3. The wind-solar hybrid power supply-based communication base station energy management system according to claim 2, wherein the emission window identification module further comprises: the clock synchronization unit is used for receiving the frame timing synchronization signal from the communication base station baseband unit and synchronizing the local clock with the base station wireless frame clock to obtain a synchronization clock; The window starting moment determining unit is used for inquiring a preset radio frequency hardware delay mapping table to obtain radio frequency power stable establishment time corresponding to the current working frequency band; and the window duration determining unit is used for inquiring a preset time slot format configuration table according to the current wireless frame and time slot information determined by the synchronous clock, and analyzing the total time length of the continuous uplink transmission time slots immediately after the current time to obtain the window duration.
  4. 4. The wind-solar hybrid power supply-based communication base station energy management system according to claim 3, wherein the energy demand calculation module comprises: the load power curve determining unit is used for determining a time change curve of the direct current side load power in the transmitting window according to the load power change characteristics; An initial power state determining unit, configured to determine, according to the bus voltage and the bus current, a bus initial power state corresponding to a start time of the emission window; and the energy demand accumulation calculation unit is used for carrying out time domain energy accumulation calculation on the time change curve and the initial power state of the bus in the duration of the emission window to obtain the energy demand of the direct current bus in the emission window.
  5. 5. The wind-solar hybrid power supply-based communication base station energy management system according to claim 4, wherein the load power curve determining unit comprises: a curve parameter extraction unit, configured to extract key parameters for generating a time variation curve from the load power variation characteristic, where the key parameters include a nominal average power value, a peak power coefficient, and a power envelope time constant; and the time change curve generating unit is used for generating a time change curve taking time as an independent variable and taking a load power value as an independent variable in a transmitting window according to the key parameters.
  6. 6. The wind-solar hybrid power supply-based communication base station energy management system according to claim 5, wherein the energy supply decision module comprises: The available discharge capacity determining unit is used for determining the available discharge energy upper limit of the energy storage unit which is available in the duration of the emission window under the condition of meeting the lowest safe electric quantity constraint condition of the energy storage unit according to the charge state parameter; The reserved discharge power determining unit is used for determining the reserved energy storage discharge power required for maintaining the initial power state of the bus at the starting moment of the emission window according to the real-time output power, the bus voltage and the bus current; The compensating energy range determining unit is used for deducting the energy storage discharging power required to be reserved from the maximum allowable discharging power to obtain net available discharging power which can be used for compensating a load of a transmitting window, multiplying the net available discharging power by the duration of the transmitting window to obtain an accumulated energy value, taking the smaller value of the upper limit of the available discharging energy and the accumulated energy value as the upper limit value of the bus compensating energy range, and setting the lower limit value of the bus compensating energy range to be not smaller than zero to obtain the bus compensating energy range.
  7. 7. The wind-solar hybrid power supply-based communication base station energy management system according to claim 6, wherein the reserved discharge power determining unit comprises: The power fluctuation and trend feature extraction unit is used for collecting a real-time output power sequence of the wind-solar power generation unit in a predefined observation period before the starting moment of the emission window, and calculating fluctuation statistical features and change trend features of the real-time output power sequence; the fluctuation compensation power determining unit is used for inquiring a preset fluctuation power-compensation mapping table according to the fluctuation statistical characteristics to obtain a fluctuation compensation power component for stabilizing short-time random fluctuation; and the trend compensation power determining unit is used for extending the change trend characteristic to the starting moment of the transmitting window, determining a trend compensation power component required for counteracting the power change caused by the change trend characteristic, and adding the fluctuation compensation power component and the trend compensation power component to obtain the required reserved energy storage discharge power.
  8. 8. The wind-solar hybrid power supply-based communication base station energy management system according to claim 7, wherein the energy supply decision module further comprises: The system comprises an energy storage unit, a bidirectional DC converter, a target compensation energy and discharge power determining unit, a target discharge power controlling unit, a target control unit and a control unit, wherein the energy storage unit is used for storing energy required by the energy storage unit and generating a bus compensation energy range; The device comprises an initial duty ratio determining and restraining unit, an amplitude limiting constraint based on the maximum allowable discharge current of an energy storage unit and the rated output power of the bidirectional direct current converter, an initial duty ratio control unit, an amplitude limiting constraint based on the maximum allowable discharge current of the energy storage unit and the rated output power of the bidirectional direct current converter, a follow-up update unit, an amplitude limiting constraint based on the safe operation range of the bidirectional direct current converter and a change rate constraint based on the thermal safety of a switching device, and a control unit, wherein the initial duty ratio determining and restraining unit is used for determining the initial duty ratio adjustment of the bidirectional direct current converter at the starting moment of the emission window according to the bus voltage control target, the discharge power control amount and the real-time output power of the wind-light power generation unit at the starting moment of the emission window according to the preset corresponding relation of the power-duty ratio of the bidirectional direct current converter; And the execution control and closed loop updating unit is used for outputting the constrained discharge power control quantity and the initial duty ratio adjustment quantity at the starting moment of the transmitting window, updating the duty ratio adjustment quantity in real time according to the deviation of the bus voltage relative to the bus voltage control target during the transmitting window, and re-applying the limiting constraint and the change rate constraint in each updating period.
  9. 9. The communication base station energy management method based on wind-solar complementary power supply is characterized by comprising the following steps of: the method comprises the steps of obtaining wind power output power of a wind power generation unit and photovoltaic output power of the photovoltaic power generation unit, wherein the wind power output power and the photovoltaic output power jointly form real-time output power; Determining window starting time and window duration of an upcoming transmitting window according to the transmitting state switching signal; Determining corresponding load power change characteristics from a preset load power change parameter set according to the window duration of the transmitting window; Determining the energy demand of a direct current bus during a transmitting window according to the load power change characteristics, the bus voltage and the bus current; Determining a bus compensation energy range which can be provided by an energy storage unit during a transmitting window according to the real-time output power, the charge state parameter and the temperature parameter; And during the transmitting window, the duty ratio regulating quantity is updated according to the deviation of the acquired bus voltage relative to the target bus voltage, and the output of the bidirectional DC converter is regulated accordingly.

Description

Communication base station energy management system and method based on wind-solar complementary power supply Technical Field The invention relates to the technical field of power supply and energy management of communication base stations, in particular to a communication base station energy management system and method based on wind-solar complementary power supply. Background In the scenes of limited access conditions of remote areas, remote mountain areas and power grids, a communication base station usually adopts a wind-solar complementary power supply mode combining wind power generation and photovoltaic power generation, and forms a power supply system by matching an energy storage unit and a power conversion device. The communication base station based on wind-solar complementary power supply generally takes a direct current bus as a power supply node to supply electric energy for a radio frequency transmitting link, a baseband processing unit and auxiliary equipment. Wind energy and solar energy have obvious randomness and intermittence, the output power changes rapidly along with meteorological conditions, and the energy storage unit and the bidirectional power converter need to be coordinated and controlled among wind and light output fluctuation, load change and safety constraint. The existing energy management scheme of the wind-solar complementary communication base station generally takes bus voltage, energy storage charge state or power balance as main control basis, and focuses on power supply structure design, wind-solar storage switching strategy and remote monitoring management so as to ensure continuous power supply capacity of the base station. However, in a communication base station adopting a time division duplex system, the radio frequency transmission link has obvious timing characteristics. During switching of the receiving and transmitting states and uplink or downlink transmitting burst, a radio frequency power amplifier, a power modulator and the like are highly sensitive to the transient stability and the ripple level of a power supply rail. If the voltage of the direct current bus is not stable before the transmission window arrives or larger transient fluctuation occurs in the initial stage of transmission, the radio frequency performance degradation caused by power supply transient, such as the increase of the modulation error of the first symbol, the increase of the bit error rate and the like, is easy to cause. Therefore, a need exists for a communication base station energy management system and method based on wind-solar complementary power supply, which can introduce information related to a transmitting window on the premise of not changing a base station communication protocol and a radio frequency structure, and perform prospective and time sequence matching management control on an energy side. Disclosure of Invention (1) Technical problem to be solved The invention aims to provide a communication base station energy management system and method based on wind-solar complementary power supply, which are used for solving the problems that the existing energy management system is difficult to sense a communication base station emission window in advance and cannot ensure stable power supply of a direct current bus before an emission burst arrives under the condition of wind-solar output fluctuation. (2) Technical proposal To achieve the above object, in one aspect, the present invention provides a communication base station energy management system based on wind-solar complementary power supply, the system comprising: The data acquisition module is used for acquiring wind power output power of the wind power generation unit and photovoltaic output power of the photovoltaic power generation unit, wherein the wind power output power and the photovoltaic output power form real-time output power together, acquiring state of charge parameters and temperature parameters of the energy storage unit, and acquiring bus voltage and bus current of a communication base station direct current bus. And the transmitting window identification module is used for acquiring a transmitting state switching signal generated by the radio frequency transmitting link of the communication base station and determining the window starting time and the window duration of the upcoming transmitting window according to the transmitting state switching signal. And the load power characteristic determining module is used for determining corresponding load power change characteristics from a preset load power change parameter set according to the window duration of the transmitting window. And the energy demand calculation module is used for determining the energy demand of the direct current bus during the emission window according to the load power change characteristics, the bus voltage and the bus current. And the energy supply decision module is used for determining a bus compensation energy rang