A full-electric traction equipment combined energy supply system and method

Abstract

This application discloses a composite energy supply system and method for all-electric tensioning equipment, relating to the field of power construction equipment technology. Within any work unit, both the electric traction machine and the all-electric tensioning machine are connected to a centralized power supply unit via a high-voltage DC bus, forming an intra-site energy sharing network. During the laying process, the all-electric tensioning machine generates regenerative power, which is then fed into the centralized power supply unit via the high-voltage DC bus. The battery management system acquires real-time status information for each work unit and generates an optimal energy dispatch strategy, i.e., dynamically dispatching battery pack transfer or initiating range extender / mains power replenishment. This application achieves dynamic optimization under multi-dimensional constraints through a three-level collaborative mechanism of "intra-site energy sharing + inter-site intelligent dispatching + multi-source continuous energy replenishment," effectively ensuring the efficient, economical, and reliable operation of the all-electric tensioning equipment in long-distance, multi-work-unit continuous construction scenarios.

Description

Technical Field

[0001] This application relates to the field of power construction equipment technology, specifically to a composite energy supply system and method for all-electric tensioning equipment. Background Technology

[0002] In the tension stringing construction of high-voltage transmission lines, traditional diesel-powered hydraulic tensioners and traction machines suffer from problems such as high noise, heavy pollution, and high energy consumption. With the development of the trend towards full electrification, providing continuous and efficient energy supply for fully electric tensioning equipment has become a core challenge.

[0003] Currently, centralized power management uses a single public battery pack to power multiple devices within the same work site, enabling energy sharing within the site. However, this solution is only applicable to a single site and cannot solve the problem of energy coordination between traction and tension fields, which are typically several kilometers or even more than ten kilometers apart.

[0004] Another approach uses mobile battery swapping units to transfer energy between sites, achieving physical energy flow. However, these mobile power supplies lack a unified voltage level, communication protocol, and standardized interface with the centralized power supply system on site, resulting in low energy transfer efficiency, complex operation, and difficulty in achieving seamless coordinated scheduling.

[0005] More importantly, current technologies generally adopt a single energy supply mode (such as relying solely on batteries or using only range extenders), which cannot dynamically balance the renewable energy in the field with the load demand, nor can they make multi-objective optimization decisions based on grid conditions, transportation costs, and construction continuity requirements.

[0006] Therefore, there is an urgent need for a composite energy supply system and method that can organically integrate "intra-site energy sharing", "inter-site intelligent battery scheduling" and "multi-source continuous energy supply" to support the efficient, economical and reliable operation of all-electric tensioning equipment in long-distance, multi-work unit continuous construction scenarios. Summary of the Invention

[0007] The purpose of this application is to provide a composite energy supply system and method for all-electric tensioning equipment. By organically integrating "intra-field energy sharing", "inter-field intelligent battery scheduling" and "multi-source continuous energy supply", dynamic collaborative optimization under multi-dimensional constraints is achieved, effectively ensuring the efficient, economical and reliable operation of all-electric tensioning equipment in long-distance, multi-operation unit continuous construction scenarios.

[0008] To achieve the above objectives, this application provides the following solution: In the first aspect, this application provides a composite energy supply system for all-electric tensioning equipment. The system is applied in a high-voltage transmission line tensioning construction site. The construction site includes one or more work units, each work unit containing an electric traction machine and an all-electric tensioning machine located in different sites. Adjacent work units can work in succession. The system includes a centralized power supply unit, a mobile battery swapping unit, and an energy replenishment unit. The energy supply unit is used to provide external energy input to the centralized power supply unit to compensate for the net energy loss of the system. The energy supply unit includes a range extender generator or external mains power and is equipped with an AC-DC converter to convert AC power into DC power before connecting it to the centralized power supply unit. Within any work unit, both the electric traction machine and the all-electric tension machine are connected to the centralized power supply unit via a high-voltage DC bus, forming an on-site energy sharing network. The all-electric tension machine serves as a regenerative power source during the wire laying process. The regenerative electrical energy generated by the regenerative power source is fed into the centralized power supply unit via the high-voltage DC bus. The centralized power supply unit includes: a common power battery pack, a battery management system, and a power distribution unit; the battery management system is communicatively connected to both the common power battery pack and the power distribution unit. The power distribution unit supports bidirectional energy transmission and is used for: Power is supplied to the electric traction machines and all-electric tension machines in the field; Receive the regenerated electrical energy and store it in the common power battery pack; The battery management system is used for: The system acquires real-time status information for each work unit, including: the power level of the common power battery pack, the power consumption of each device, the geographical location of the construction site, the availability of the external power grid, and energy price information. An optimal energy scheduling strategy is generated based on the state information; wherein the optimal energy scheduling strategy includes at least one of the following: Dispatch mobile battery swapping units to transfer battery packs from sites with surplus power or charging stations. The energy replenishment unit is activated to supplement the centralized power supply unit with power through range extender generators or external grid power; Dynamically adjust the charging and discharging power allocation of each work unit to prioritize the continuous operation of critical equipment; The mobile battery swapping unit is used to perform cross-site transfer of battery packs.

[0009] In one embodiment, the electric traction machine is a fully electric traction machine or a range-extended electric traction machine.

[0010] In one embodiment, the range extender generator set in the energy replenishment unit includes: a diesel engine, a permanent magnet synchronous generator, and an AC-DC generator controller; The diesel engine drives the permanent magnet synchronous generator to generate electricity; The AC-DC generator controller converts the AC power output from the permanent magnet synchronous generator into DC power, and charges the common power battery pack through the power distribution unit, or directly supplies power to the equipment in the construction site.

[0011] In one embodiment, the centralized power supply unit and the mobile battery swapping unit use the same voltage level and communication protocol, and are connected through a preset standardized electrical interface.

[0012] In one embodiment, the power distribution unit includes: a DC charging interface and a device power supply interface; The DC charging interface is connected to the energy supply unit; the equipment power supply interface is connected to the electric traction machine and the all-electric tension machine.

[0013] In one embodiment, the centralized power supply unit further includes an external AC charging port; the external AC charging port is connected to the power distribution unit via an AC-DC charger for connecting to the external power grid for charging.

[0014] Secondly, this application provides a composite energy supply method for an all-electric tensioning device, the method being implemented using the aforementioned composite energy supply system for an all-electric tensioning device; the composite energy supply method for an all-electric tensioning device includes: A centralized power supply unit is deployed in each work unit, and the electric traction machine and all-electric tension machine in the field are connected to the centralized power supply unit to form an energy sharing network in the field. The regenerative power generated by the all-electric tensioner during the wire laying process is fed into the high-voltage DC bus and uniformly dispatched by the centralized power supply unit. It is given priority to supply the electric traction machine in the same working unit, and the remaining power is stored in the common power battery pack of the centralized power supply unit. Real-time status information of each work unit is collected, including: the power information of the common power battery pack, the power consumption of each device, the geographical location of the construction site, the availability of the external power grid and energy price information. Based on the state information, an optimal energy scheduling strategy is generated; wherein the optimal energy scheduling strategy includes at least one of the following: Dispatch mobile battery swapping units to transfer battery packs from sites with surplus power or charging stations. The energy replenishment unit is activated to supplement the centralized power supply unit with power through range extender generators or external grid power; Dynamically adjust the charging and discharging power allocation of each work unit to prioritize the continuous operation of critical equipment; Operations are performed according to the optimal energy dispatch strategy to ensure construction continuity and energy economy.

[0015] In one embodiment, the method is applied to a continuous tension line construction scenario, wherein multiple work units work sequentially to form a work chain of traction machine-tension machine-traction machine-tension machine, and energy balance and cost optimization of the entire line are achieved through cross-site collaborative scheduling.

[0016] According to the specific embodiments provided in this application, the following technical effects are disclosed: This application discloses a composite energy supply system and method for all-electric tensioning equipment. By constructing a composite energy supply system for high-voltage transmission line tensioning construction sites, it utilizes a three-level collaborative mechanism of "intra-site energy sharing + inter-site intelligent scheduling + multi-source continuous energy replenishment," i.e., an optimal energy scheduling strategy, to achieve dynamic optimization under multi-dimensional constraints. Based on real-time status information such as the power level of the shared power battery pack, the power consumption of each device, the geographical location of the construction site, the availability of the external power grid, and energy price information, it intelligently decides the energy flow path. This maximizes the utilization of regenerated electricity from the tensioning machine while ensuring construction continuity through mobile battery swapping and external energy replenishment. This application effectively solves the problem that traditional single-energy modes cannot simultaneously achieve efficiency, economy, and reliability, providing a complete energy security system for the large-scale application of all-electric tensioning equipment. Therefore, this application can effectively ensure the efficient, economical, and reliable operation of all-electric tensioning equipment in long-distance, multi-work-unit continuous construction scenarios. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A structural block diagram of a composite energy supply system for all-electric tensioning equipment; Figure 2 This is a flowchart of a composite energy supply method for all-electric tensioning equipment. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] In one exemplary embodiment, such as Figure 1 As shown, a composite energy supply system for all-electric tensioning equipment is provided. The system is applied in a high-voltage transmission line tensioning construction site, which includes one or more work units. Each work unit contains an electric traction machine and an all-electric tensioning machine located at different sites, and adjacent work units can work sequentially.

[0022] The system includes a centralized power supply unit, a mobile battery swapping unit, and an energy replenishment unit.

[0023] The energy supply unit is used to provide external energy input to the centralized power supply unit to compensate for the net energy loss of the system. The energy supply unit includes a range extender generator or external mains power and is equipped with an AC-DC converter to convert AC power into DC power before connecting it to the centralized power supply unit.

[0024] Within any work unit, the electric traction machine (including a fully electric traction machine or a range-extended electric traction machine) and the fully electric tension machine are both connected to the centralized power supply unit via a high-voltage DC bus, forming an energy-sharing network within the field. The fully electric tension machine serves as a regenerative power source during the cable laying process. The regenerative power generated by the regenerative power source is fed into the centralized power supply unit via the high-voltage DC bus, and is preferentially supplied to the electric traction machines in the same field. The remaining power is stored in the common power battery pack of the centralized power supply unit.

[0025] The centralized power supply unit includes: a common power battery pack, a battery management system, and a power distribution unit; the battery management system is communicatively connected to the common power battery pack and the power distribution unit.

[0026] The power distribution unit supports bidirectional energy transmission and is used to supply power to the electric traction machine and the all-electric tension machine in the field, as well as to receive regenerated electrical energy and store it in the common power battery pack.

[0027] The battery management system is used to obtain real-time status information of each work unit. The status information includes: the power information of the public power battery pack, the power consumption of each device, the geographical location of the construction site, the availability of the external power grid, and energy price information.

[0028] The battery management system is also used to comprehensively evaluate the feasibility and economy of mobile battery swapping and the availability of energy replenishment based on the aforementioned status information, and to generate the optimal energy dispatch strategy.

[0029] Optimal energy dispatch strategies include at least one of the following: (1) Dispatch mobile battery swapping units to transfer battery packs from sites with surplus power or charging stations.

[0030] (2) Start the energy supply unit to supplement the centralized power supply unit with power through range-extended power generation or external grid power.

[0031] (3) Dynamically adjust the charging and discharging power allocation of each work unit to prioritize the continuous operation of key equipment.

[0032] In one embodiment, the range extender generator set in the energy supply unit includes: a diesel engine, a permanent magnet synchronous generator, and an AC-DC generator controller; the diesel engine drives the permanent magnet synchronous generator to generate electricity; the AC-DC generator controller converts the AC power output by the permanent magnet synchronous generator into DC power, and charges the common power battery pack through the power distribution unit, or directly supplies power to the equipment in the construction site.

[0033] In one embodiment, the centralized power supply unit and the mobile battery swapping unit use the same voltage level and communication protocol, and are connected through a preset standardized electrical interface.

[0034] In one embodiment, the power distribution unit includes: a DC charging interface and a device power supply interface; the DC charging interface is connected to the energy supply unit; and the device power supply interface is connected to the electric traction machine and the all-electric tension machine.

[0035] In one embodiment, the centralized power supply unit further includes an external AC charging port; the external AC charging port is connected to the power distribution unit via an AC-DC charger for connecting to the external power grid for charging.

[0036] In one exemplary embodiment, a composite energy supply method for an all-electric tensioning device is provided, the method being implemented using the aforementioned composite energy supply system for an all-electric tensioning device.

[0037] like Figure 2 As shown, the composite energy supply method for all-electric tensioning equipment includes: Step 100: Deploy centralized power supply units in each work unit and connect the electric traction machines and all-electric tension machines in the field to the centralized power supply units to form an energy-sharing network in the field.

[0038] Step 200: Control the regenerative power generated by the all-electric tensioner during the wire laying process to be fed into the high-voltage DC bus, and uniformly dispatched by the centralized power supply unit to give priority to the electric traction machine in the same working unit, and store the remaining power in the common power battery pack of the centralized power supply unit.

[0039] Step 300: Collect real-time status information for each work unit. This status information includes: the power level of the shared power battery pack, the power consumption of each device, the geographical location of the construction site, and information on external power grid availability and energy prices.

[0040] Step 400: Generate an optimal energy scheduling strategy based on the state information. The optimal energy scheduling strategy includes at least one of the following: The mobile battery swapping unit is dispatched to transfer battery packs from locations with surplus power or charging stations. "Surplus power" refers to a reserve of power exceeding a pre-set capacity.

[0041] The energy replenishment unit is activated to supplement the centralized power supply unit with power through range extender generators or external grid power.

[0042] The charging and discharging power allocation of each work unit is dynamically adjusted to prioritize the continuous operation of critical equipment.

[0043] Step 500: Execute the operation according to the optimal energy dispatch strategy to ensure construction continuity and energy economy.

[0044] The method is applied to continuous tension line construction scenarios, in which multiple work units work in sequence to form a work chain of traction machine-tension machine-traction machine-tension machine, and achieve energy balance and cost optimization of the entire line through cross-site collaborative scheduling.

[0045] This application has the following beneficial effects: Highly adaptable: It can intelligently switch energy supply modes according to the working scenario to adapt to various working conditions.

[0046] High energy efficiency: Maximizes the use of regenerated electrical energy from the tensioner, reducing dependence on external energy sources.

[0047] Total energy supply is guaranteed: Construction continuity is ensured through a multi-source energy replenishment mechanism.

[0048] Green and environmentally friendly: Prioritize the use of mains electricity to supplement energy and reduce carbon emissions.

[0049] Highly systematic: It has built a complete energy supply ecosystem, supporting large-scale applications.

[0050] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A combined energy supply system for an all-electric traction equipment, characterized in that, The system is applied in the tension stringing construction site of high-voltage transmission lines. The construction site includes one or more work units, each work unit containing an electric traction machine and a fully electric tensioning machine located in different sites, and adjacent work units can work in succession. The system includes a centralized power supply unit, a mobile battery swapping unit, and an energy replenishment unit. The energy supply unit is used to provide external energy input to the centralized power supply unit to compensate for the net energy loss of the system. The energy supply unit includes a range extender generator or external mains power and is equipped with an AC-DC converter to convert AC power into DC power before connecting it to the centralized power supply unit. Within any work unit, both the electric traction machine and the all-electric tension machine are connected to the centralized power supply unit via a high-voltage DC bus, forming an on-site energy sharing network. The all-electric tension machine serves as a regenerative power source during the wire laying process. The regenerative electrical energy generated by the regenerative power source is fed into the centralized power supply unit via the high-voltage DC bus. The centralized power supply unit includes: a common power battery pack, a battery management system, and a power distribution unit; the battery management system is communicatively connected to both the common power battery pack and the power distribution unit. The power distribution unit supports bidirectional energy transmission and is used for: Power is supplied to the electric traction machines and all-electric tension machines in the field; Receive the regenerated electrical energy and store it in the common power battery pack; The battery management system is used for: The system acquires real-time status information for each work unit, including: the power level of the common power battery pack, the power consumption of each device, the geographical location of the construction site, the availability of the external power grid, and energy price information. An optimal energy scheduling strategy is generated based on the state information; wherein the optimal energy scheduling strategy includes at least one of the following: Dispatch mobile battery swapping units to transfer battery packs from sites with surplus power or charging stations. The energy replenishment unit is activated to supplement the centralized power supply unit with power through range extender generators or external grid power; Dynamically adjust the charging and discharging power allocation of each work unit to prioritize the continuous operation of critical equipment; The mobile battery swapping unit is used to perform cross-site transfer of battery packs.

2. The all-electric traction equipment hybrid power supply system of claim 1, wherein, The electric traction machine is either a fully electric traction machine or a range-extended electric traction machine.

3. The composite energy supply system for all-electric tensioning equipment according to claim 1, characterized in that, The range extender generator set in the energy supply unit includes: a diesel engine, a permanent magnet synchronous generator, and an AC-DC generator controller; The diesel engine drives the permanent magnet synchronous generator to generate electricity; The AC-DC generator controller converts the AC power output from the permanent magnet synchronous generator into DC power, and charges the common power battery pack through the power distribution unit, or directly supplies power to the equipment in the construction site.

4. The composite energy supply system for all-electric tensioning equipment according to claim 1, characterized in that, The centralized power supply unit and the mobile battery swapping unit use the same voltage level and communication protocol, and are connected through a pre-set standardized electrical interface.

5. The composite energy supply system for all-electric tensioning equipment according to claim 1, characterized in that, The power distribution unit includes: a DC charging interface and a device power supply interface; The DC charging interface is connected to the energy supply unit; the equipment power supply interface is connected to the electric traction machine and the all-electric tension machine.

6. The composite energy supply system for all-electric tensioning equipment according to claim 1, characterized in that, The centralized power supply unit further includes an external AC charging port; the external AC charging port is connected to the power distribution unit via an AC-DC charger for charging via an external power grid.

7. A composite energy supply method for all-electric tensioning equipment, characterized in that, The method is implemented using the composite energy supply system for all-electric tensioning equipment as described in any one of claims 1-6; the composite energy supply method for all-electric tensioning equipment includes: A centralized power supply unit is deployed in each work unit, and the electric traction machine and all-electric tension machine in the field are connected to the centralized power supply unit to form an energy sharing network in the field. The regenerative power generated by the all-electric tensioner during the wire laying process is fed into the high-voltage DC bus and uniformly dispatched by the centralized power supply unit. It is given priority to supply the electric traction machine in the same working unit, and the remaining power is stored in the common power battery pack of the centralized power supply unit. Real-time status information of each work unit is collected, including: the power information of the common power battery pack, the power consumption of each device, the geographical location of the construction site, the availability of the external power grid and energy price information. Based on the state information, an optimal energy scheduling strategy is generated; wherein the optimal energy scheduling strategy includes at least one of the following: Dispatch mobile battery swapping units to transfer battery packs from sites with surplus power or charging stations. The energy replenishment unit is activated to supplement the centralized power supply unit with power through range extender generators or external grid power; Dynamically adjust the charging and discharging power distribution at each work site to prioritize the continuous operation of critical equipment; Operations are performed according to the optimal energy dispatch strategy to ensure construction continuity and energy economy.

8. The composite energy supply method for all-electric tensioning equipment according to claim 7, characterized in that, The method is applied to continuous tension line construction scenarios, in which multiple work units work in sequence to form a work chain of traction machine-tension machine-traction machine-tension machine, and achieve energy balance and cost optimization of the entire line through cross-site collaborative scheduling.

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