Intelligent balanced power-supply system with multiple electric powers and multiple electric power storage

Abstract

The invention belongs to the technical field of renewable energy generation and electric power supply, and specifically relates to an intelligent balanced power-supply system with multiple electric powers and multiple electric power storage, and a method. Through a multiple electric powers and multiple electric power storage intelligent balanced power-supply control technology and the control method, using multitask parallel control and management, the multiple electric powers and multiple electric power storage are allocated evenly and intelligently, so that defects exist in the prior art are solved, and integrated management, parallel and complementation, balanced allocation, reasonable and efficient of the multiple electric powers and the multiple electric power storage. The system and the method ensure that need of user's loads for electricity is satisfied by a plurality of ways. The system realizes stabilization of unstable new energy electricity through intelligent balancing and auxiliary charge, and makes electricity generated by renewable energy directly invert to power supply of the user's loads. Intermediate steps and transforming times from the renewable energy generation to electricity utilization by the users are reduced, and an electricity utilization rate of the renewable energy generation is improved. Meanwhile, system configuration is also saved. In conditions of reducing hardware of power transformation and making a renewable electric system satisfy the power supply that same users' loads need, the system reduces allocation of storage batteries and system investment scale, and improves utilization rates of investment and resources.

Description

Technical field [0001] The invention belongs to the technical field of new energy power supply, and specifically relates to a multi-power multi-storage intelligent balanced power supply system. technical background [0002] Faced with the increasingly tense and scarce global energy situation, countries around the world are striving to develop and utilize new energy sources, especially solar and wind energy, which are ubiquitous and easy to use, forming one of the main forces of distributed clean energy. . With technological progress and technological development, the technologies of solar and wind power generation are becoming more mature, and the cost is getting lower and lower. With government support, the application of solar power and wind power in developed countries has developed rapidly. From the current general grid-side application, The development of on-site user-side applications has made the application methods increasingly scientific, and the business model has beco...

AI Technical Summary

Problems solved by technology

[0003] New energy power, especially distributed power (such as common wind power, photovoltaic), because its power generation and power supply change with the weather, the output is extremely unstable, and cannot meet the load power demand directly used by users, so the existing technology Distributed power supply systems all adopt the method of storing electricity first, then discharging it and inverting it, and then supplying it to the load. This not only increases the link of storing electricity and then inverting it, but also wastes the loss of electric energy conversion, and when the battery is discharged, it cannot continue to charge. Waste more distributed power, and after the power storage is used up, it is difficult for users to continue to charge and then supply power. The solution to this problem in the prior art is to increase the number of power generation and storage batteries. Make the system according to the maximum load, even if the maximum load is less than 10%, configure the system with 100% maximum load, which increases investment and waste of resources, and reduces the return on investment

[0007] 1. If figure 1 As shown, the existing new technology systems and products supply power to the load after the new energy power is inverted, then AC / DC power conversion, charging and storage, DC / DC conversion and DC / AC inverter, which increases the number of inverters. Transformation and power conversion link, increased investment, but also increased power conversion and inverter power loss;

[0008] 2. New energy power is charged by DC / DC or inverter and AC / DC. Due to the unstable performance of new electricity, the optimal charging control method designed by the charger for the characteristics of the battery cannot be implemented as designed. Seriously affect the charging effect and battery performance and life;

[0009] 3. Since the new energy power cannot directly supply power to the user's load, it supplies power to the load through first storage and then discharge conversion and inversion. At present, the charging of battery storage requires a process, several hours, so the existing technology The three links of new energy power generation, power storage and power supply are sequential and single-task working methods. During the power storage process, the battery cannot supply power, and at this time there will be a shortage of load power; in addition, during the power supply process, it cannot be stored At this time, the power generated by the new energy power will be wasted or sold on the grid. It can be seen that only a part (storage part) of the new energy power of this technical solution is to supply power to the user load

[0010] 4. At present, one way to improve the above technical solution is to double the number of batteries and divide them into two or more parts, so that when one part of the batteries is charging, the other part of the batteries will supply power to the load; but this will greatly increase the system capacity. The cost and investment reduce the efficiency of use, increase the cost of electricity, and reduce the return on investment of investors

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