Energy storage system, method, energy management system and power system
An energy management system, energy storage system technology, applied in electrical components, circuit devices, AC network circuits, etc., can solve the problems of increased line loss, change of grid active power, power factor reduction, etc. The effect of automatic reactive power compensation and utilization maximization
Active Publication Date: 2022-05-17
SVOLT ENERGY TECHNOLOGY CO LTD
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Problems solved by technology
[0003] When the energy storage system is connected to the grid for charging and discharging, it will change the active power of the grid, especially when discharging, the active power of the grid side will decrease accordingly, but the grid cannot adjust the corresponding reactive power, which will cause the power factor to drop, resulting in The line loss increases, and when the power factor drops to a certain value, it will also be assessed by the power grid department
Therefore, at this stage, it is mainly through the additional configuration of reactive power compensation devices in the energy storage system (such as figure 1 shown) or PCS main control method to compensate the reactive power of the grid to improve the power factor of the grid, which will undoubtedly increase the cost of system integration
Moreover, when the energy storage system is not fully charged and discharged, there may be idle PCS capacity and low PCS utilization
Method used
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[0053] Specific embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.
[0054] The present disclosure provides a power system, such as figure 2 As shown, the power system includes: a grid 5 , a grid load 6 and an energy storage system 10 .
[0055] Wherein, the grid load 6 is connected to the grid 5 and is used for working with the electric power provided by the grid 5 , wherein the grid load 6 may be, for example, lighting devices, production equipment and the like. Among them, there are two types of electric power provided by the grid 5 to the load 6 of the grid; one is active power, and the other is reactive power. Wherein, the active power is the electric power required to maintain the normal operation of the grid load 6 ,...
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The present disclosure relates to an energy storage system, method, energy management system and power system. The energy storage system includes: energy management system, energy storage components, energy storage conversion modules and smart meters; the energy management system is used to: schedule the energy storage In this mode, according to the preset grid power factor and the current active power and current reactive power collected by the smart meter, the energy storage converter module is controlled to perform reactive power compensation to the grid. As a result, fast and fully automatic reactive power compensation of the power grid can be realized through the energy storage and conversion module, without adding reactive power compensation devices or energy storage and conversion module controllers, simplifying the structure of the energy storage system and reducing system integration costs. In addition to being used for charging and discharging energy storage components, the energy storage and conversion module can also be used for reactive power compensation of the grid, so that the energy storage and conversion module can be effectively used and the utilization rate can be maximized.
Description
technical field [0001] The present disclosure relates to the field of energy storage, and in particular, relates to an energy storage system, method, energy management system, and power system. Background technique [0002] A battery energy storage system (Battery Energy Storage System, BESS) refers to a battery-based electric energy storage and conversion device. The battery energy storage system is mainly composed of a battery stack, a battery management system (Battery Management System, BMS), a power conversion system (Power Convert System, PCS, also known as bidirectional converter), energy management system (Energy Management System, EMS) and other components. Among them, EMS is responsible for communicating with BMS, PCS and other equipment for overall monitoring and control of the battery energy storage system, including data monitoring, dynamic environment monitoring, strategy control, data remote transmission, system protection, anti-backflow control, reactive powe...
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IPC IPC(8): H02J3/32H02J3/18H02J3/38
CPCH02J3/32H02J3/18H02J3/381Y02A30/60
Inventor 晏辉王君生谈作伟栾淑利徐楠王峰陈彬彬
Owner SVOLT ENERGY TECHNOLOGY CO LTD