Intelligent construction hoist control system with energy storage and energy feedback

Abstract

The invention provides an intelligent construction hoist control system with energy storage and energy feedback, which is characterized in that one or two control boxes are additionally arranged, and an energy storage power supply system is arranged in each control box; the energy storage power supply system is composed of a rectification / feedback unit, an energy storage unit (including a charging and discharging converter), a braking unit (including a braking resistor), an energy management unit and a power supply control unit. By adding the energy storage power supply system, efficient electric energy utilization and recovery can be carried out; the equipment can still operate in a power-off state; various electric energy management modes can be freely set, and electric energy supply and energy storage life optimization use are both considered. The problem that energy cannot be recycled when a battery is fully charged due to the absence of an energy feedback unit in the prior art is solved; as no special energy storage management module exists, peak valley electricity and battery service life optimization cannot be realized; as the intelligent driving control cabinet is not additionally provided with large-current / high-voltage direct-current impact prevention equipment, large-current and high-voltage impact is easily caused when a sliding contact line is in poor contact, and the equipment is damaged.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent construction elevator control systems. Specifically, it relates to an intelligent construction elevator control system with energy storage and energy feedback. Background Art

[0002] Currently, the common DC bus construction elevator control system usually equips a rectification unit and a braking unit at the bottom of two cages, plus an energy storage unit, so as to realize the common DC bus power supply and power-off use of the cages. The existing technical solutions have the following defects: 1. There is no energy feedback unit, and energy cannot be recovered when the battery is fully charged; 2. There is no dedicated energy storage management module, and peak-valley electricity and battery service life optimization cannot be achieved; 3. The intelligent driving control cabinet does not add anti-large current / high-voltage DC impact equipment, and it is easy to cause large current and high-voltage impact when the sliding contact line is in poor contact, resulting in equipment damage. Summary of the Invention

[0003] In order to solve the above problems, the purpose of the present invention is to provide an intelligent construction elevator control system with energy storage and energy feedback. The system adds one or two control boxes, and the control box contains an energy storage power supply system, which is composed of a rectification / feedback unit, an energy storage unit (including a charge-discharge converter), a braking unit (including a braking resistor), an energy management unit, and a power supply control unit. The present invention can solve the technical problems in the existing technical solutions that because there is no energy feedback unit, energy cannot be recovered when the battery is fully charged; because there is no dedicated energy storage management module, peak-valley electricity and battery service life optimization cannot be achieved; because the intelligent driving control cabinet does not add anti-large current / high-voltage DC impact equipment, large current and high-voltage impact are easy to occur when the sliding contact line is in poor contact, resulting in equipment damage. Specifically, by configuring the energy storage power supply system, the system can perform efficient electric energy utilization and recovery; ensure that the equipment can still operate in the power-off state; and can freely set a variety of electric energy management methods, taking into account the optimal use of electric energy supply and energy storage life.

[0004] The technical solution adopted by the present invention is as follows:

[0005] An intelligent construction elevator control system with energy storage and energy feedback, the system includes an energy storage power supply system and an intelligent driving control cabinet.

[0006] Further, the energy storage power supply system includes a rectification / feedback unit, an energy storage unit (including a charge-discharge converter), a braking unit (including a braking resistor), an energy management unit, and a power supply control unit.

[0007] Furthermore, the rectification / feedback unit can achieve bidirectional power transmission between the equipment power consumption and the power grid; the energy storage unit is used for storing electric energy and charge-discharge management; the braking unit is used to consume redundant electric energy, mainly for the condition that the power grid is powered off and the equipment is still running downward and generating electricity continuously after the energy storage unit is fully charged; the energy management unit can achieve energy allocation, such as functions of peak-valley electricity and maximum power limit of the power grid; the power supply control unit is used for overcurrent protection and power verification. For example, if the power deviation between the output power of the cage and the output power of the energy storage power supply system is large, it is judged that there is an abnormal leakage situation, and the power supply is cut off to improve safety.

[0008] Furthermore, the DC bus voltage output by the energy storage power supply system supplies power to two intelligent driving cages through cables or sliding contacts, and can also be used for a single cage.

[0009] Furthermore, the energy storage power supply system is placed at the bottom layer in the form of a control box or runs up and down with the cage.

[0010] Furthermore, the number of the energy storage power supply systems can be configured as one or two.

[0011] Furthermore, each intelligent driving cage is equipped with an intelligent driving control cabinet, and the input DC bus voltage of the control cabinet controls the motor operation through inversion.

[0012] Furthermore, the intelligent driving control cabinet also has a DCDC conversion to provide power for other electrical equipment.

[0013] Furthermore, the energy storage part in the energy storage unit includes various forms such as energy storage batteries, supercapacitors, and fuel cells.

[0014] Furthermore, when the service life of the energy storage unit is affected by charge-discharge cycles (such as batteries), the energy management unit can always make the energy storage unit work in an optimal state. For example, the battery power cycles between 50% - 80%, always in a state of shallow charge and shallow discharge.

[0015] Advantages of the present invention:

[0016] By adding an energy storage power supply system, the present invention can achieve efficient utilization and recovery of electric energy; ensure that the equipment can still operate under power-off conditions; and can freely set various electric energy management methods to balance the electric energy supply and optimize the use of the energy storage life. Description of the drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only a part of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0018] Figure 1 Schematic diagram of the intelligent construction elevator control system of the present invention;

[0019] Figure 2 Schematic diagram of the energy storage power supply system of the present invention; Specific embodiments

[0020] To make the objectives, technical solutions, and advantages of the present invention clearer, the following will describe the technical solutions of the present invention in detail. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative efforts belong to the scope protected by the present invention.

[0021] Embodiment:

[0022] An intelligent construction elevator control system with energy storage and energy feedback, the system includes an energy storage power supply system and an intelligent driving control cabinet.

[0023] More specifically, the energy storage power supply system includes a rectifier / feedback unit, an energy storage unit (including a charge and discharge converter), a braking unit (including a braking resistor), an energy management unit, and a power supply control unit.

[0024] More specifically, the rectifier / feedback unit can achieve bidirectional transmission between the equipment power consumption and the power grid; the energy storage unit is used for storing electric energy and charge and discharge management; the braking unit is used for consuming excess electric energy, mainly for the working condition of power grid power failure and continuous power generation when the equipment is still descending and running after the energy storage unit is full; the energy management unit can achieve energy allocation, such as peak-valley electricity, maximum power limit of the power grid, etc.; the power supply control unit is used for overcurrent protection and power verification, such as when the output power of the cage is greatly deviated from the output power of the energy storage power supply system, it is judged that there is an abnormal leakage situation, and the power supply is cut off to improve safety.

[0025] More specifically, the energy storage power supply system is placed at the bottom layer in the form of a control box.

[0026] More specifically, the energy storage power supply system outputs a DC bus voltage to supply power to two intelligent driving cages through cables or sliding contacts.

[0027] More specifically, the energy storage power supply system is configured with one.

[0028] More specifically, each intelligent driving cage is equipped with an intelligent driving control cabinet. The input DC bus voltage of the control cabinet is inverted to control the operation of the motor.

[0029] More specifically, the intelligent driving control cabinet also has a DCDC conversion to provide power for other electrical equipment.

[0030] More specifically, the energy storage part in the energy storage unit includes various forms such as energy storage batteries, supercapacitors, and fuel cells.

[0031] More specifically, when the energy storage unit is affected by charge and discharge cycles and its service life is affected (such as a battery), the energy management unit can always keep the energy storage unit working in the optimal state. For example, the battery charge is cycled between 50% - 80%, always in a shallow charge and shallow discharge state.

[0032] More specifically, when the left and right cages move upward simultaneously, the two intelligent driving control cabinets are in a power-consuming state. The energy storage power supply system supplies power to the DC bus through the energy storage unit. When the energy storage power reaches 50%, it switches to the power grid to supply power to the DC bus through the rectifier / feedback unit. When the left and right cages move downward simultaneously, the two intelligent driving control cabinets are in a power generation state. The electric energy is transmitted from the DC bus to the energy storage power supply system, and the generated energy charges the energy storage unit. When the energy storage power reaches 80%, the charging of the energy storage unit is turned off, and the electric energy is fed back to the power grid through the rectifier / feedback unit. When the left cage moves upward and the right cage moves downward, the control cabinet of the left cage consumes power, and the control cabinet of the right cage generates power and directly supplies it to the control cabinet of the left cage through the DC bus. The power consumption is greater than the power generation, and the insufficient electric energy is supplemented by the energy storage power supply system through the DC bus. When the left cage moves downward and the right cage moves upward, the control cabinet of the left cage consumes power, and the control cabinet of the right cage generates power and directly supplies it to the control cabinet of the left cage through the DC bus. The power generation is greater than the power consumption, and the excess electric energy is transmitted through the DC bus to the energy storage power supply system and charged into the energy storage unit.

[0033] More specifically, when the power grid is in a power-off state, the energy storage power supply system supplies the electric energy stored in the energy storage unit to the left and right cages for use, and at the same time, the generated electric energy is charged into the energy storage unit. When the energy storage unit is fully charged, the generated electric energy is consumed by the braking unit.

[0034] More specifically, the energy storage power supply system can implement the peak-valley electricity mode. During the low electricity price period, the power consumption of the cage operation is provided by the power grid, and at the same time, the power grid also charges the energy storage unit, enabling it to store electric energy during the low electricity price period. During the high electricity price period, the power consumption of the cage operation is provided by the energy storage unit, ensuring that the cage operation can utilize the peak-valley electricity price difference to reduce the electricity cost.

[0035] More specifically, the energy storage power supply system can implement a power limit mode, and the maximum power that the power grid can supply can be set. When the total power consumption of the cage exceeds the maximum set power of the power grid, the insufficient part is supplied with electric energy by the energy storage unit to ensure that the power grid does not operate with over-power.

[0036] More specifically, the DC bus power supply includes cables and sliding contact lines.

[0037] As described above, the above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A control system for an intelligent construction hoist with energy storage and energy feedback, characterized in that, The system includes an energy storage power supply system, an intelligent driving control cabinet, and a DC bus. The energy storage power supply system includes a rectifier / feedback unit, an energy storage unit (including a charge-discharge converter), a braking unit (including a braking resistor), an energy management unit, and a power supply control unit. The rectifier / feedback unit is used for the bidirectional transmission between equipment power consumption and the power grid; the energy storage unit is used for storing electric energy and charge-discharge management; the braking unit is used for consuming redundant electric energy; the energy management unit is used for energy allocation; the power supply control unit is used for overcurrent protection and power verification. The intelligent driving control cabinet is equipped in a separate cage.

2. The intelligent construction elevator control system with energy storage and energy feedback according to claim 1, characterized in that The energy storage part in the energy storage unit can be an energy storage battery / super capacitor / fuel cell, etc.

3. The intelligent construction elevator control system with energy storage and energy feedback according to claim 2, characterized in that When the left and right cages are running in the same direction, the energy storage power supply system can cooperate with the DC bus to control the stored energy of the energy storage unit between 50% and 80%; when the left and right cages are running in the opposite direction, the electric energy required by the power-consuming cage is preferentially provided by the power generation operation of the other cage, the redundant electric energy is charged into the energy storage power supply system, and the insufficient part is provided by the energy storage power supply system.

4. The intelligent construction elevator control system with energy storage and energy feedback according to claim 3, characterized in that, When the power grid is in a power-off state, the energy storage power supply system stores electric energy through the energy storage unit for the cage to use, and at the same time, the generated electric energy is charged into the energy storage unit. After the energy storage unit is fully charged, the generated electric energy is consumed by the braking unit.

5. The intelligent construction elevator control system with energy storage and energy feedback according to claim 4, characterized in that, The energy storage power supply system can implement the peak-valley electricity mode and the power limit mode.

6. The intelligent construction elevator control system with energy storage and energy feedback according to claim 5, characterized in that, The peak-valley electricity mode means that during the low electricity price period, the power consumption of the cage operation is preferentially provided by the power grid, and at the same time, the power grid also charges the energy storage unit; during the high electricity price period, the power consumption of the cage operation is preferentially provided by the energy storage unit.

7. The intelligent construction elevator control system with energy storage and energy feedback according to claim 5, characterized in that, The power limit mode means that the maximum power that the power grid can supply can be set. When the total power consumption of the cage exceeds the maximum set power of the power grid, the insufficient part is provided by the energy storage unit.

8. A control system for an intelligent construction elevator with energy storage and energy feedback, according to any one of claims 6-7, characterized in that, The energy storage power supply system outputs the DC bus voltage to supply power to two or a single cage through a cable or a sliding contact line.

9. The intelligent construction elevator control system with energy storage and energy feedback according to claim 8, characterized in that, The energy storage power supply system is placed in the basement in the form of a control box or runs up and down with the cage. The energy storage power supply system can be configured with one or two.

10. The intelligent construction elevator control system with energy storage and energy feedback according to claim 9, characterized in that, The intelligent driving control cabinet inputs the DC bus voltage and controls the motor operation through inversion.

11. A control system for a smart construction elevator with energy storage and energy feedback according to claim 10, characterized in that, The intelligent driving control cabinet also has a DCDC conversion to provide power for other electrical equipment.

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