Power transmission and distribution line safety management circuit
By designing a power transmission and distribution line safety management circuit that includes a power supply module, a central control module, a two-way adjustment module and a power management module, the instability problem of DC power transmission and distribution lines when the power supply voltage drops or increases is achieved. A more stable power supply quality.
Patent Information
- Application Number
- CN202411489201.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-24
- Publication Date
- 2025-01-21
AI Technical Summary
When the DC transmission and distribution lines in the prior art experience a voltage drop or boost in the power supply, the DC bus is unstable, which reduces the power supply quality and may damage the power load.
A security management circuit of transmission and distribution lines is designed, including the first power supply module, the second power supply module, the transmission and distribution module, the DC bus module, the central control module, the two -way adjustment module, the power management module, and the energy storage module. The circuit samples and adjust the voltage through the central control module, and uses a two -way adjustment module and electrical management module for voltage compensation and voltage voltage processing to ensure the stable power supply of the DC bus.
Through the design of this circuit, when the DC bus is unstable, it can improve the power supply stability and quality of the DC bus through voltage compensation and voltage voltage treatment, and avoid damage to the electricity load.
Smart Images
Figure CN119340953A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of power transmission and distribution management, and in particular to a power transmission and distribution line safety management circuit. Background Art
[0002] With the development of flexible DC technology, the development and utilization of distributed renewable energy power generation, and the access of more and more urban DC loads, DC transmission and distribution lines have become a research hotspot in the power field. The transmission and distribution lines in the existing technology generally have a variety of different types of power supply sources, such as municipal voltage power supply, photovoltaic power generation source, and wind power generation source, which are all controlled by DC bus for transmission and distribution. However, when the power supply source has a voltage drop or a voltage increase, the DC bus will become unstable, reduce the power supply quality, and cause the power load to be damaged due to voltage instability. Therefore, there is room for improvement. Summary of the invention
[0003] The embodiment of the present invention provides a power transmission and distribution line safety management circuit to solve the problems raised in the above background technology.
[0004] According to an embodiment of the present invention, there is provided a power transmission and distribution line safety management circuit, comprising: a first power supply module, a second power supply module, a power transmission and distribution module, a DC bus module, a central control module, a bidirectional regulation module, a first power management module, a second power management module and an energy storage module; A first power supply module is connected to the bidirectional regulation module and is used to receive AC power, rectify and filter the AC power and output a first electric energy, and superimpose the first electric energy with the first compensation electric energy output by the bidirectional regulation module and output a second electric energy; A second power supply module is connected to the bidirectional regulation module, and is used for photoelectric conversion and voltage regulation and outputting a third electric energy, and superimposing the third electric energy with the second compensation electric energy output by the bidirectional regulation module and outputting a fourth electric energy; a power transmission and distribution module, connected to the first power supply module, the second power supply module, the DC bus module and the central control module, configured to transmit the first electric energy or the second electric energy to the DC bus module, and stop transmitting the first electric energy or the second electric energy upon receiving a first protection signal output by the central control module, and transmit the third electric energy or the fourth electric energy to the DC bus and stop transmitting the third electric energy or the fourth electric energy upon receiving a second protection signal output by the central control module; a DC bus module, connected to the bidirectional regulation module, configured to receive the first electric energy, the second electric energy, the third electric energy or the fourth electric energy and supply power to the electric load and provide the fifth electric energy to the bidirectional regulation module, receive the sixth electric energy output by the bidirectional regulation module and supply power to the electric load; A central control module, connected to the first power supply module and the second power supply module, for performing voltage sampling on the first electric energy or the second electric energy and outputting a first detection signal, performing voltage sampling on the third electric energy or the fourth electric energy and outputting a second detection signal, outputting a first protection signal, a first energy storage signal and a first adjustment signal when the first detection signal is greater than a set voltage stabilization threshold, outputting a second protection signal, a second energy storage signal and a first adjustment signal when the second detection signal is greater than the voltage stabilization threshold, outputting a first compensation signal and a first adjustment signal when the first detection signal is less than a stabilization threshold, outputting a second compensation signal and a first adjustment signal when the second detection signal is less than a stabilization threshold, and outputting a second adjustment signal when the DC bus module is not connected to the power load; a bidirectional regulation module, connected to the central control module, the first power management module and the second power management module, for performing DC-DC regulation on the power transmitted by the first power management module and outputting the first compensation power when receiving the first compensation signal and the first adjustment signal, performing DC-DC regulation on the power transmitted by the second power management module and outputting the second compensation power when receiving the second compensation signal and the first adjustment signal, providing the sixth power when receiving the first energy storage signal and the first adjustment signal or the second energy storage signal and the first adjustment signal, and performing DC-DC regulation on the fifth power and supplying power to the first power management module and the second management module when receiving the second adjustment signal; a first power management module connected to the central control module and the energy storage module, and configured to transmit the power released by the energy storage module to the bidirectional regulation module when receiving the first compensation signal, and transmit the first power to the energy storage module when receiving the first energy storage signal; a second power management module connected to the central control module and the energy storage module, and configured to transmit the power released by the energy storage module to the bidirectional regulation module when receiving the second compensation signal, and transmit the third power to the energy storage module when receiving the second energy storage signal; The energy storage module is used to store the first electric energy transmitted by the first electric energy management module and the second electric energy transmitted by the second electric energy management module, and release the stored electric energy.
[0005] As a further solution of the present invention: the first power supply module includes a power supply interface, a first regulator, a first capacitor, a second capacitor and a first diode; the central control module includes a central controller and a first detection device; Preferably, the first end and the second end of the power interface are respectively connected to the first end and the second end of the first regulator, the third end of the first regulator is connected to the first end of the first capacitor and the anode of the first diode, the second end of the first capacitor is connected to the first end of the first detection device, the first end of the second capacitor and the first power management module, the second end of the second capacitor is connected to the second end of the first detection device and the fourth end of the first regulator, the third end of the first detection device is connected to the IO1 end of the central controller, and the cathode of the first diode is connected to the power transmission and distribution module.
[0006] As a further solution of the present invention: the second power supply module includes a photovoltaic cell, a second regulator, a third capacitor, a fourth capacitor and a second diode; the central control module also includes a second detection device; Preferably, the first end and the second end of the photovoltaic cell are respectively connected to the first end and the second end of the second regulator, the third end of the second regulator is connected to the first end of the second detection device, the first end of the fourth capacitor and the anode of the second diode, the second end of the fourth capacitor is connected to the second power management module and the first end of the third capacitor, the second end of the third capacitor is connected to the second end of the second detection device and the fourth end of the second regulator, the third end of the second detection device is connected to the IO2 end of the central controller, and the cathode of the second diode is connected to the power transmission and distribution module.
[0007] As a further solution of the present invention: the power transmission and distribution module includes a first circuit breaker, a first circuit breaker, a second circuit breaker and a second circuit breaker; the DC bus module includes a DC bus and a power load; Preferably, the first moving end and the second moving end of the first circuit breaker are respectively connected to the cathode of the first diode and the second end of the second capacitor, the first static end of the first circuit breaker is connected to the first end of the DC bus, the first end of the power load, and the first static end of the second circuit breaker, the first moving end and the second moving end of the second circuit breaker are respectively connected to the cathode of the second diode and the second end of the third capacitor, the second static end of the first circuit breaker is connected to the second end of the DC bus, the second end of the power load, and the second end of the second circuit breaker, and the control end of the first circuit breaker and the control end of the second circuit breaker are respectively connected to the IO3 end and IO4 end of the central controller.
[0008] As a further solution of the present invention: the bidirectional regulation module includes a fifth capacitor, a sixth bipolar transistor, a fifth bipolar transistor, a first bipolar transistor, a second bipolar transistor, a first inductor, a third bipolar transistor, a fourth bipolar transistor and a sixth capacitor; Preferably, one end of the fifth capacitor is connected to the first end of the DC bus, the collector of the first bipolar transistor, the collector of the second bipolar transistor and the first end of the sixth capacitor, the emitter of the first bipolar transistor is connected to the collector of the second bipolar transistor, the collector of the sixth bipolar transistor and the collector of the fifth bipolar transistor, and is connected to the emitter of the third bipolar transistor and the collector of the fourth bipolar transistor through the first inductor, and the other end of the fifth capacitor is connected to the emitter of the second bipolar transistor, the emitter of the fourth bipolar transistor, and the emitter of the fifth bipolar transistor. , the second end of the sixth capacitor and the second end of the DC bus, the emitter of the fifth bipolar transistor is connected to the second end of the fourth capacitor, the emitter of the sixth bipolar transistor is connected to the second end of the first capacitor, the gate of the first bipolar transistor, the gate of the second bipolar transistor, the gate of the third bipolar transistor, the gate of the fourth bipolar transistor, the gate of the fifth bipolar transistor and the gate of the sixth bipolar transistor are respectively connected to the IO6 terminal, IO5 terminal, IO7 terminal, IO8 terminal, IO10 terminal and IO11 terminal of the central controller.
[0009] As a further solution of the present invention: the first power management module includes a ninth bipolar transistor, a third diode, a fourth diode and a seventh bipolar transistor; the energy storage module includes a first supercapacitor; Preferably, the collector of the ninth bipolar transistor is connected to the first end of the first supercapacitor and the emitter of the seventh bipolar transistor, the emitter of the ninth bipolar transistor is connected to the first end of the sixth capacitor, the gate of the ninth bipolar transistor is connected to the cathode of the third diode and the cathode of the fourth diode, the anode of the fourth diode is connected to the gate of the seventh bipolar transistor and the IO12 terminal of the central controller, the collector of the seventh bipolar transistor is connected to the first end of the first capacitor, the anode of the third diode is connected to the IO11 terminal of the central controller, and the second end of the first supercapacitor is connected to the second end of the sixth capacitor.
[0010] As a further solution of the present invention: the second power management module includes a tenth bipolar transistor, a fifth diode, a sixth diode and an eighth bipolar transistor; the energy storage module also includes a second supercapacitor; Preferably, the collector of the tenth bipolar transistor is connected to the first end of the second supercapacitor and the emitter of the eighth bipolar transistor, the collector of the eighth bipolar transistor is connected to the first end of the fourth capacitor, the emitter of the tenth bipolar transistor is connected to the first end of the sixth capacitor, the second end of the second supercapacitor is connected to the second end of the sixth capacitor, the gate of the tenth bipolar transistor is connected to the cathode of the fifth diode and the cathode of the sixth diode, the anode of the sixth diode is connected to the gate of the eighth bipolar transistor and the IO9 terminal of the central controller, and the anode of the fifth diode is connected to the IO10 terminal of the central controller.
[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: the power transmission and distribution line safety management circuit of the present invention completes the power supply to the DC bus module by the first power supply module and the second power supply module, and when a voltage drop occurs in the first power supply module, the central control module controls the first power management module to cooperate with the bidirectional regulation module to perform voltage regulation on the power released by the energy storage module and perform compensation processing on the power output by the first power supply module; when the first power supply module is boosted, the first power management module will store the power output by the first power supply module and perform voltage stabilization processing on the input power so as to meet the power supply to the DC bus module again; similarly, when a voltage drop occurs in the second power supply module, the second power management module will perform compensation processing on the second power supply module; when both the second power supply module and the first power supply module are boosted, the energy storage module will be directly controlled to cooperate with the bidirectional regulation module, the first power management module and the second power management module to perform current-boosting and voltage-stabilizing power supply processing, thereby improving the power supply stability and power supply quality of the DC bus module. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.
[0013] Figure 1 A schematic block diagram of a power transmission and distribution line safety management circuit provided in an embodiment of the present invention.
[0014] Figure 2 A circuit diagram of a power transmission and distribution line safety management circuit provided in an embodiment of the present invention.
[0015] Figure 3 A first circuit diagram of a power transmission and distribution module provided in an embodiment of the present invention.
[0016] Figure 4 A second circuit diagram of the power transmission and distribution module provided in an embodiment of the present invention. DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0018] In one embodiment, see Figure 1, a power transmission and distribution line safety management circuit, comprising: a first power supply module 1, a second power supply module 2, a power transmission and distribution module 3, a DC bus module 4, a central control module 5, a bidirectional regulation module 6, a first power management module 7, a second power management module 8 and an energy storage module 9; Specifically, the first power supply module 1 is connected to the bidirectional regulation module 6, and is used to receive AC power, rectify and filter the AC power and output the first power, and superimpose the first power with the first compensation power output by the bidirectional regulation module 6 and output the second power; A second power supply module 2 is connected to the bidirectional regulation module 6, and is used for photoelectric conversion and voltage regulation and outputting a third electric energy, and superimposing the third electric energy with the second compensation electric energy output by the bidirectional regulation module 6 and outputting a fourth electric energy; The power transmission and distribution module 3 is connected to the first power supply module 1, the second power supply module 2, the DC bus module 4 and the central control module 5, and is used to transmit the first electric energy or the second electric energy to the DC bus module 4, and stop transmitting the first electric energy or the second electric energy when receiving the first protection signal output by the central control module 5, and transmit the third electric energy or the fourth electric energy to the DC bus and stop transmitting the third electric energy or the fourth electric energy when receiving the second protection signal output by the central control module 5; The DC bus module 4 is connected to the bidirectional regulation module 6, and is used to receive the first electric energy, the second electric energy, the third electric energy or the fourth electric energy and supply power to the electric load and provide the fifth electric energy to the bidirectional regulation module 6, and receive the sixth electric energy output by the bidirectional regulation module 6 and supply power to the electric load; A central control module 5, connected to the first power supply module 1 and the second power supply module 2, for performing voltage sampling on the first electric energy or the second electric energy and outputting a first detection signal, performing voltage sampling on the third electric energy or the fourth electric energy and outputting a second detection signal, outputting a first protection signal, a first energy storage signal and a first adjustment signal when the first detection signal is greater than a set voltage stabilization threshold, outputting a second protection signal, a second energy storage signal and a first adjustment signal when the second detection signal is greater than the voltage stabilization threshold, outputting a first compensation signal and a first adjustment signal when the first detection signal is less than a stabilization threshold, outputting a second compensation signal and a first adjustment signal when the second detection signal is less than a stabilization threshold, and outputting a second adjustment signal when the DC bus module 4 is not connected to the power load; The bidirectional regulation module 6 is connected to the central control module 5, the first power management module 7 and the second power management module 8, and is used to perform DC-DC regulation on the power transmitted by the first power management module 7 and output the first compensation power when receiving the first compensation signal and the first adjustment signal, perform DC-DC regulation on the power transmitted by the second power management module 8 and output the second compensation power when receiving the second compensation signal and the first adjustment signal, provide the sixth power when receiving the first energy storage signal and the first adjustment signal or the second energy storage signal and the first adjustment signal, and perform DC-DC regulation on the fifth power and supply power to the first power management module 7 and the second management module when receiving the second adjustment signal; A first power management module 7, connected to the central control module 5 and the energy storage module 9, for transmitting the power released by the energy storage module 9 to the bidirectional adjustment module 6 when receiving the first compensation signal, and transmitting the first power to the energy storage module 9 when receiving the first energy storage signal; The second power management module 8 is connected to the central control module 5 and the energy storage module 9, and is used to transmit the power released by the energy storage module 9 to the bidirectional adjustment module 6 when receiving the second compensation signal, and transmit the third power to the energy storage module 9 when receiving the second energy storage signal; The energy storage module 9 is used to store the first electric energy transmitted by the first electric energy management module 7 and the second electric energy transmitted by the second electric energy management module 8, and release the stored electric energy.
[0019] In a specific embodiment, the first power supply module 1 may adopt a first power supply circuit composed of a power interface, an AC-DC converter, a capacitor, etc., which may be connected to AC power and rectify, regulate voltage and filter the AC power, and perform voltage drop compensation when receiving the power output by the first power management module 7; the second power supply module 2 may adopt a second power supply circuit composed of a photovoltaic cell, a voltage regulator, a capacitor, etc., which may perform photoelectric conversion, voltage regulation and filtering, and perform voltage drop compensation when receiving the power output by the second power management module 8; the power transmission and distribution module 3 may adopt a power transmission and distribution control circuit composed of a circuit breaker, which may control the connection status of the first power supply module 1 and the second power supply module 2 with the DC bus module 4; the DC bus module 4 may adopt a DC bus circuit composed of a DC bus and a power load, which may perform power aggregation and power distribution control; the central control module 5 may adopt a central control circuit composed of a single-chip microcomputer and a detection device, and the detection device may sample the voltages of the first power supply module 1 and the second power supply module 2, and the single-chip The machine integrates many components such as an arithmetic unit, a controller, a memory, and an input / output device, sets a voltage stabilization threshold, and realizes functions such as signal voltage comparison, signal processing, data storage, module control, and timing control; the above-mentioned bidirectional regulation module 6 can adopt a bidirectional regulation circuit composed of IGBT, capacitors, and capacitors, which can realize bidirectional power transmission between the DC bus module 4 and the first power management module 7 and the second power management module 8, bidirectional power transmission between the first power management module 7 and the first power supply module 1, and bidirectional power transmission between the second power management module 8 and the second power supply module 2; the above-mentioned first power management module 7 can adopt a first power management circuit composed of IGBT and a diode, which can control the charging and discharging of the energy storage module 9 and perform power compensation for the first power supply module 1; the above-mentioned second power management module 8 can adopt a second power management circuit composed of IGBT and a diode, which can control the charging and discharging of the energy storage module 9 and perform power compensation for the second power supply module 2; the above-mentioned energy storage module 9 can adopt an energy storage circuit composed of supercapacitors to perform energy storage and discharge control.
[0020] In another embodiment, see Figure 1 , Figure 2 , Figure 3 and Figure 4 , the first power supply module 1 includes a power supply interface, a first regulator T1, a first capacitor C1, a second capacitor C2 and a first diode D1; the central control module 5 includes a central controller U1 and a first detection device; Specifically, the first end and the second end of the power interface are respectively connected to the first end and the second end of the first regulator T1, the third end of the first regulator T1 is connected to the first end of the first capacitor C1 and the anode of the first diode D1, the second end of the first capacitor C1 is connected to the first end of the first detection device, the first end of the second capacitor C2 and the first power management module 7, the second end of the second capacitor C2 is connected to the second end of the first detection device and the fourth end of the first regulator T1, the third end of the first detection device is connected to the IO1 end of the central controller U1, and the cathode of the first diode D1 is connected to the power transmission and distribution module 3.
[0021] In a specific embodiment, the first regulator T1 may be composed of a rectifier and a voltage stabilizer; the central controller U1 may be a STM32 single-chip microcomputer; the first detection device may be composed of a resistor voltage divider circuit for voltage sampling.
[0022] Further, the second power supply module 2 includes a photovoltaic cell, a second regulator T2, a third capacitor C3, a fourth capacitor C4 and a second diode D2; the central control module 5 also includes a second detection device; Specifically, the first end and the second end of the photovoltaic cell are respectively connected to the first end and the second end of the second regulator T2, the third end of the second regulator T2 is connected to the first end of the second detection device, the first end of the fourth capacitor C4 and the anode of the second diode D2, the second end of the fourth capacitor C4 is connected to the second power management module 8 and the first end of the third capacitor C3, the second end of the third capacitor C3 is connected to the second end of the second detection device and the fourth end of the second regulator T2, the third end of the second detection device is connected to the IO2 end of the central controller U1, and the cathode of the second diode D2 is connected to the power transmission and distribution module 3.
[0023] In a specific embodiment, the second regulator T2 may be composed of a buck circuit; the second detection device may be composed of a resistor voltage divider circuit for voltage sampling.
[0024] Furthermore, the power transmission and distribution module 3 includes a first circuit breaker K1, a first circuit breaker K1-1, a second circuit breaker K2 and a second circuit breaker K2-1; the DC bus module 4 includes a DC bus and a power load; Specifically, the first moving end and the second moving end of the first circuit breaker K1-1 are respectively connected to the cathode of the first diode D1 and the second end of the second capacitor C2, the first static end of the first circuit breaker K1-1 is connected to the first end of the DC bus, the first end of the power load, and the first static end of the second circuit breaker K2-1, the first moving end and the second moving end of the second circuit breaker K2-1 are respectively connected to the cathode of the second diode D2 and the second end of the third capacitor C3, the second static end of the first circuit breaker K1-1 is connected to the second end of the DC bus, the second end of the power load, and the second end of the second circuit breaker K2-1, and the control end of the first circuit breaker K1 and the control end of the second circuit breaker K2 are respectively connected to the IO3 end and IO4 end of the central controller U1.
[0025] In a specific embodiment, the first circuit breaker K1-1 may be a double-pole double-throw normally closed switch, and the first circuit breaker K1 is controlled to disconnect by magnetic attraction; the second circuit breaker K2-1 may be a double-pole double-throw normally closed switch, and the second circuit breaker K2 is controlled to disconnect by magnetic attraction.
[0026] Further, the bidirectional regulation module 6 includes a fifth capacitor C5, a sixth bipolar transistor Q6, a fifth bipolar transistor Q5, a first bipolar transistor Q1, a second bipolar transistor Q2, a first inductor L1, a third bipolar transistor Q3, a fourth bipolar transistor Q4 and a sixth capacitor C6; Specifically, one end of the fifth capacitor C5 is connected to the first end of the DC bus, the collector of the first bipolar transistor Q1, the collector of the second bipolar transistor Q2 and the first end of the sixth capacitor C6, the emitter of the first bipolar transistor Q1 is connected to the collector of the second bipolar transistor Q2, the collector of the sixth bipolar transistor Q6 and the collector of the fifth bipolar transistor Q5, and is connected to the emitter of the third bipolar transistor Q3 and the collector of the fourth bipolar transistor Q4 through the first inductor L1, and the other end of the fifth capacitor C5 is connected to the emitter of the second bipolar transistor Q2, the emitter of the fourth bipolar transistor Q4 and the collector of the fifth bipolar transistor Q5. The emitter of the fifth bipolar transistor Q5 is connected to the second end of the fourth capacitor C4, the emitter of the sixth bipolar transistor Q6 is connected to the second end of the first capacitor C1, the gate of the first bipolar transistor Q1, the gate of the second bipolar transistor Q2, the gate of the third bipolar transistor Q3, the gate of the fourth bipolar transistor Q4, the gate of the fifth bipolar transistor Q5 and the gate of the sixth bipolar transistor Q6 are respectively connected to the IO6 terminal, IO5 terminal, IO7 terminal, IO8 terminal, IO10 terminal and IO11 terminal of the central controller U1.
[0027] In a specific embodiment, the first bipolar transistor Q1, the second bipolar transistor Q2, the third bipolar transistor Q3, the fourth bipolar transistor Q4, the fifth bipolar transistor Q5 and the sixth bipolar transistor Q6 can all be IGBTs, wherein the first bipolar transistor Q1, the second bipolar transistor Q2, the third bipolar transistor Q3 and the fourth bipolar transistor Q4 cooperate with the first inductor L1 to control the power transmission between the DC bus module 4 and the first power management module 7 and the second power management module 8, the sixth bipolar transistor Q6 cooperates with the first inductor L1, the third bipolar transistor Q3 and the fourth bipolar transistor Q4 to control the power transmission between the first power management module 7 and the first power supply module 1, and the fifth bipolar transistor Q5 cooperates with the first inductor L1, the third bipolar transistor Q3 and the fourth bipolar transistor Q4 to control the power transmission between the second power supply module 2 and the second power management module 8.
[0028] Further, the first power management module 7 includes a ninth bipolar transistor Q9, a third diode D3, a fourth diode D4 and a seventh bipolar transistor Q7; the energy storage module 9 includes a first supercapacitor CD1; Specifically, the collector of the ninth bipolar transistor Q9 is connected to the first end of the first super capacitor CD1 and the emitter of the seventh bipolar transistor Q7, the emitter of the ninth bipolar transistor Q9 is connected to the first end of the sixth capacitor C6, the gate of the ninth bipolar transistor Q9 is connected to the cathode of the third diode D3 and the cathode of the fourth diode D4, the anode of the fourth diode D4 is connected to the gate of the seventh bipolar transistor Q7 and the IO12 terminal of the central controller U1, the collector of the seventh bipolar transistor Q7 is connected to the first end of the first capacitor C1, the anode of the third diode D3 is connected to the IO11 terminal of the central controller U1, and the second end of the first super capacitor CD1 is connected to the second end of the sixth capacitor C6.
[0029] In a specific embodiment, the ninth bipolar transistor Q9 and the seventh bipolar transistor Q7 can both be IGBTs, wherein the ninth bipolar transistor Q9 controls the discharge operation of the first supercapacitor CD1, and the seventh bipolar transistor Q7 controls the energy storage operation of the first supercapacitor CD1.
[0030] Further, the second power management module 8 includes a tenth bipolar transistor Q10, a fifth diode D5, a sixth diode D6 and an eighth bipolar transistor Q8; the energy storage module 9 also includes a second supercapacitor CD2; Specifically, the collector of the tenth bipolar transistor Q10 is connected to the first end of the second super capacitor CD2 and the emitter of the eighth bipolar transistor Q8, the collector of the eighth bipolar transistor Q8 is connected to the first end of the fourth capacitor C4, the emitter of the tenth bipolar transistor Q10 is connected to the first end of the sixth capacitor C6, the second end of the second super capacitor CD2 is connected to the second end of the sixth capacitor C6, the gate of the tenth bipolar transistor Q10 is connected to the cathode of the fifth diode D5 and the cathode of the sixth diode D6, the anode of the sixth diode D6 is connected to the gate of the eighth bipolar transistor Q8 and the IO9 terminal of the central controller U1, and the anode of the fifth diode D5 is connected to the IO10 terminal of the central controller U1.
[0031] In a specific embodiment, the eighth bipolar transistor Q8 and the tenth bipolar transistor Q10 can both be IGBTs, wherein the eighth bipolar transistor Q8 controls the energy storage work of the second supercapacitor CD2, and the tenth bipolar transistor Q10 controls the discharge work of the second supercapacitor CD2.
[0032] In a power transmission and distribution line safety management circuit of the present embodiment, AC power is connected by a power interface, the first regulator T1 performs rectification and voltage regulation, the first capacitor C1 and the second capacitor C2 perform filtering processing, and transmit it to the DC bus through the first circuit breaker K1-1, the photovoltaic cell performs photoelectric conversion, the second regulator T2 performs voltage regulation, the third capacitor C3 and the fourth capacitor C4 perform filtering, and transmit it to the DC bus through the second circuit breaker K2-1, and at the same time, the first detection device samples the voltage of the power output by the first regulator T1, and the second detection device samples the voltage of the power output by the second regulator T2. When the signal sampled by the first detection device is greater than the central controller When the voltage stabilization threshold set by U1 is reached, the first power supply module 1 will experience a voltage boost. At this time, the central controller U1 will control the first circuit breaker K1 to disconnect through the first circuit breaker K1, and the IO12 terminal of the central controller U1 will output the first energy storage signal to control the seventh bipolar transistor Q7 and the ninth bipolar transistor Q9 to turn on, so that the first supercapacitor CD1 stores the electric energy output by the first power supply module 1. At the same time, the IO7 terminal and IO8 terminal of the central controller U1 respectively control the conduction of the third bipolar transistor Q3 and the fourth bipolar transistor Q4, and then perform DC-DC regulation processing. The regulated electric energy can be transmitted to the DC bus to the first bipolar transistor Q1. Similarly, the second power supply module When the voltage of block 2 is boosted, the tenth bipolar transistor Q10 and the eighth bipolar transistor Q8 are turned on, part of the electric energy output by the second power supply module 2 is stored by the second supercapacitor CD2, and part of it is transmitted to the DC bus after adjustment. If the first power supply module 1 and the second power supply module 2 are boosted at the same time, the first supercapacitor CD1 and the second supercapacitor CD2 will store energy at the same time, and after the bidirectional regulation module 6 performs current boost and voltage regulation, it will be transmitted to the DC bus to meet the power supply of the DC bus. If the signal sampled by the first detection device is less than the stable threshold set by the central controller U1, the first power supply module 1 will experience a voltage drop, and the IO11 terminal of the central controller U1 will output The first compensation signal controls the sixth bipolar transistor Q6 and the ninth bipolar transistor Q9 to turn on, and the IO7 and IO8 terminals of the central controller U1 control the third bipolar transistor Q3 and the fourth bipolar transistor Q4 to perform voltage regulation, so that the electric energy released by the first supercapacitor CD1 is transmitted to the second capacitor C2 after voltage regulation to provide compensation electric energy, thereby meeting the power supply of the first power supply module 1. Similarly, when a voltage drop occurs in the second power supply module 2, the electric energy released by the second supercapacitor CD2 is regulated by the bidirectional regulation module 6 and transmitted to the third capacitor C3, thereby performing electric energy compensation processing on the second power supply module 2 to meet the power supply of the second power supply module 2 to the DC bus.
[0033] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.
[0034] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. A power transmission and distribution line safety management circuit, characterized in that: The power transmission and distribution line safety management circuit comprises: a first power supply module, a second power supply module, a power transmission and distribution module, a DC bus module, a central control module, a bidirectional regulation module, a first power management module, a second power management module and an energy storage module; The first power supply module is connected to the bidirectional regulation module and is used to receive AC power, rectify and filter the AC power and output the first power, and superimpose the first power with the first compensation power output by the bidirectional regulation module and output the second power; The second power supply module is connected to the bidirectional regulation module, and is used for photoelectric conversion and voltage regulation and outputting a third electric energy, and superimposing the third electric energy with the second compensation electric energy output by the bidirectional regulation module and outputting a fourth electric energy; The power transmission and distribution module is connected to the first power supply module, the second power supply module, the DC bus module and the central control module, and is used to transmit the first electric energy or the second electric energy to the DC bus module, and stop transmitting the first electric energy or the second electric energy when receiving the first protection signal output by the central control module, and transmit the third electric energy or the fourth electric energy to the DC bus and stop transmitting the third electric energy or the fourth electric energy when receiving the second protection signal output by the central control module; The DC bus module is connected to the bidirectional regulation module, and is used to receive the first electric energy, the second electric energy, the third electric energy or the fourth electric energy and supply power to the electric load and provide the fifth electric energy to the bidirectional regulation module, and receive the sixth electric energy output by the bidirectional regulation module and supply power to the electric load; The central control module is connected to the first power supply module and the second power supply module, and is used to perform voltage sampling on the first electric energy or the second electric energy and output a first detection signal, perform voltage sampling on the third electric energy or the fourth electric energy and output a second detection signal, and output a first protection signal, a first energy storage signal and a first adjustment signal when the first detection signal is greater than a set voltage stabilization threshold, and output a second protection signal, a second energy storage signal and a first adjustment signal when the second detection signal is greater than the voltage stabilization threshold, and output a first compensation signal and a first adjustment signal when the first detection signal is less than a stabilization threshold, and output a second compensation signal and a first adjustment signal when the second detection signal is less than a stabilization threshold, and output a second adjustment signal when the DC bus module is not connected to the power load; The bidirectional regulation module is connected to the central control module, the first power management module and the second power management module, and is used to perform DC-DC regulation on the power transmitted by the first power management module and output the first compensation power when receiving the first compensation signal and the first adjustment signal, perform DC-DC regulation on the power transmitted by the second power management module and output the second compensation power when receiving the second compensation signal and the first adjustment signal, provide the sixth power when receiving the first energy storage signal and the first adjustment signal or the second energy storage signal and the first adjustment signal, and perform DC-DC regulation on the fifth power and supply power to the first power management module and the second management module when receiving the second adjustment signal; The first power management module is connected to the central control module and the energy storage module, and is used to transmit the power released by the energy storage module to the bidirectional regulation module when receiving the first compensation signal, and transmit the first power to the energy storage module when receiving the first energy storage signal; The second power management module is connected to the central control module and the energy storage module, and is used to transmit the power released by the energy storage module to the bidirectional regulation module when receiving the second compensation signal, and transmit the third power to the energy storage module when receiving the second energy storage signal; The energy storage module is used to store the first electric energy transmitted by the first electric energy management module and the second electric energy transmitted by the second electric energy management module, and release the stored electric energy.
2. A power transmission and distribution line safety management circuit according to claim 1, characterized in that: The first power supply module includes a power supply interface, a first regulator, a first capacitor, a second capacitor and a first diode; the central control module includes a central controller and a first detection device; The first end and the second end of the power interface are respectively connected to the first end and the second end of the first regulator, the third end of the first regulator is connected to the first end of the first capacitor and the anode of the first diode, the second end of the first capacitor is connected to the first end of the first detection device, the first end of the second capacitor and the first power management module, the second end of the second capacitor is connected to the second end of the first detection device and the fourth end of the first regulator, the third end of the first detection device is connected to the IO1 end of the central controller, and the cathode of the first diode is connected to the power transmission and distribution module.
3. A power transmission and distribution line safety management circuit according to claim 2, characterized in that: The second power supply module includes a photovoltaic cell, a second regulator, a third capacitor, a fourth capacitor and a second diode; the central control module also includes a second detection device; The first end and the second end of the photovoltaic cell are respectively connected to the first end and the second end of the second regulator, the third end of the second regulator is connected to the first end of the second detection device, the first end of the fourth capacitor and the anode of the second diode, the second end of the fourth capacitor is connected to the second power management module and the first end of the third capacitor, the second end of the third capacitor is connected to the second end of the second detection device and the fourth end of the second regulator, the third end of the second detection device is connected to the IO2 end of the central controller, and the cathode of the second diode is connected to the power transmission and distribution module.
4. A power transmission and distribution line safety management circuit according to claim 3, characterized in that: The power transmission and distribution module includes a first circuit breaker, a first disconnect switch, a second circuit breaker and a second disconnect switch; the DC bus module includes a DC bus and a power load; The first moving end and the second moving end of the first circuit breaker are respectively connected to the cathode of the first diode and the second end of the second capacitor, the first static end of the first circuit breaker is connected to the first end of the DC bus, the first end of the power load, and the first static end of the second circuit breaker, the first moving end and the second moving end of the second circuit breaker are respectively connected to the cathode of the second diode and the second end of the third capacitor, the second static end of the first circuit breaker is connected to the second end of the DC bus, the second end of the power load, and the second end of the second circuit breaker, and the control end of the first circuit breaker and the control end of the second circuit breaker are respectively connected to the IO3 end and IO4 end of the central controller.
5. A power transmission and distribution line safety management circuit according to claim 4, characterized in that: The bidirectional regulation module includes a fifth capacitor, a sixth bipolar transistor, a fifth bipolar transistor, a first bipolar transistor, a second bipolar transistor, a first inductor, a third bipolar transistor, a fourth bipolar transistor and a sixth capacitor; One end of the fifth capacitor is connected to the first end of the DC bus, the collector of the first bipolar transistor, the collector of the second bipolar transistor and the first end of the sixth capacitor, the emitter of the first bipolar transistor is connected to the collector of the second bipolar transistor, the collector of the sixth bipolar transistor and the collector of the fifth bipolar transistor and is connected to the emitter of the third bipolar transistor and the collector of the fourth bipolar transistor through the first inductor, and the other end of the fifth capacitor is connected to the emitter of the second bipolar transistor, the emitter of the fourth bipolar transistor, The second end of the sixth capacitor and the second end of the DC bus, the emitter of the fifth bipolar transistor is connected to the second end of the fourth capacitor, the emitter of the sixth bipolar transistor is connected to the second end of the first capacitor, the gate of the first bipolar transistor, the gate of the second bipolar transistor, the gate of the third bipolar transistor, the gate of the fourth bipolar transistor, the gate of the fifth bipolar transistor and the gate of the sixth bipolar transistor are respectively connected to the IO6 terminal, IO5 terminal, IO7 terminal, IO8 terminal, IO10 terminal and IO11 terminal of the central controller.
6. A power transmission and distribution line safety management circuit according to claim 5, characterized in that: The first power management module includes a ninth bipolar transistor, a third diode, a fourth diode and a seventh bipolar transistor; the energy storage module includes a first supercapacitor; The collector of the ninth bipolar transistor is connected to the first end of the first supercapacitor and the emitter of the seventh bipolar transistor, the emitter of the ninth bipolar transistor is connected to the first end of the sixth capacitor, the gate of the ninth bipolar transistor is connected to the cathode of the third diode and the cathode of the fourth diode, the anode of the fourth diode is connected to the gate of the seventh bipolar transistor and the IO12 terminal of the central controller, the collector of the seventh bipolar transistor is connected to the first end of the first capacitor, the anode of the third diode is connected to the IO11 terminal of the central controller, and the second end of the first supercapacitor is connected to the second end of the sixth capacitor.
7. A power transmission and distribution line safety management circuit according to claim 6, characterized in that: The second power management module includes a tenth bipolar transistor, a fifth diode, a sixth diode and an eighth bipolar transistor; the energy storage module also includes a second supercapacitor; The collector of the tenth bipolar transistor is connected to the first end of the second supercapacitor and the emitter of the eighth bipolar transistor, the collector of the eighth bipolar transistor is connected to the first end of the fourth capacitor, the emitter of the tenth bipolar transistor is connected to the first end of the sixth capacitor, the second end of the second supercapacitor is connected to the second end of the sixth capacitor, the gate of the tenth bipolar transistor is connected to the cathode of the fifth diode and the cathode of the sixth diode, the anode of the sixth diode is connected to the gate of the eighth bipolar transistor and the IO9 terminal of the central controller, and the anode of the fifth diode is connected to the IO10 terminal of the central controller.