Control method for power grid frequency modulation participated by battery energy storage system considering priority level
A battery energy storage system and battery energy storage technology, applied in flexible AC transmission systems, circuit devices, AC network circuits, etc., to achieve the effects of maintaining the operating state, improving the ability of rapid frequency regulation, and optimizing the allocation of energy storage capacity
Inactive Publication Date: 2018-02-09
华泰慧能(北京)能源技术有限公司
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Problems solved by technology
[0002] With the increase of wind power, photovoltaic and other new energy generation grid-connected capacity, its volatility and uncertainty pose challenges to the security and stability of the power grid
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[0055] A control method for a battery energy storage system that considers priority levels to participate in power grid frequency regulation, the battery energy storage system is composed of multiple battery energy storage groups,
[0056] (1) When the frequency of the power system is within the grid regulation dead zone range (f DB.min , f DB.max ) outside, f DB.min Represents the frequency lower limit of the grid regulation dead zone, f DB.max Represents the frequency upper limit of the grid regulation dead zone; includes the following steps:
[0057] Step 1: Collect the frequency information of the power system. According to the power system dispatching instruction P, the update cycle of the instruction is T. In this example, the cycle of T is 4s. Based on this, the power grid frequency modulation capacity demand P' and power demand for power grid frequency modulation are obtained. Q, where P'=P,
[0058] Step 2: Determine the state of charge of the battery energy sto...
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The invention relates to a battery energy storage system, and specifically relates to a control method for power grid frequency modulation participated by a battery energy storage system considering apriority level. According to the battery energy storage control characteristic and operational characteristic, the state of charge of the battery energy storage system is determined, and action priority indexes K1 and K2 of each battery energy storage group are obtained according to a priority index calculation method, so that the action priorities of each battery energy storage group in an energy storage set can be sorted and classified; and the battery energy storage groups are selected according to the priorities, the selected battery energy storage group is operated at the maximum power and the non-selected battery energy storage group is 0 in power. Compared with the prior art, the beneficial effects are achieved as follows: the energy storage capacity is optimized and configured, the quick frequency modulation capability of the power grid is improved, and the operation state of the energy storage battery can be maintained.
Description
Technical field: [0001] The invention relates to a battery energy storage system, in particular to a control method for taking priority into consideration of battery energy storage systems participating in power grid frequency regulation. Background technique: [0002] With the increase of wind power, photovoltaic and other new energy generation grid-connected capacity, its volatility and uncertainty pose challenges to the security and stability of the power grid. As a novel and high-quality mobile energy storage device, the battery energy storage system, with its second-level charge and discharge capacity, tens of thousands of cycle life, wide temperature adaptability and environmental friendliness, large-scale energy storage technology because of its Rapid power throughput and precise control have become the most potential solution and have received widespread attention. [0003] For the battery energy storage system, its scale is large, the internal monomer parameters of...
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IPC IPC(8): H02J3/24H02J3/46H02J3/32
CPCH02J3/24H02J3/32H02J3/46H02J2203/20Y02E40/10
Inventor 李海峰王光灏邓焱宋晨雷
Owner 华泰慧能(北京)能源技术有限公司