Energy management method for energy storage system
A technology of energy management and energy storage system, which is applied in the field of microgrid energy management system, can solve problems such as poor economy, difficult control, and large error in state of charge detection, and achieve the effect of non-stop maintenance
Pending Publication Date: 2020-06-16
SHANGHAI ELECTRIC DISTRIBUTED ENERGY TECH CO LTD
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Problems solved by technology
[0004] As a peak-shaving and valley-filling energy storage system, lithium batteries are not economical. The only advantage is that the detection of the state of charge of the battery is relatively accurate and easy to control. Getting bigger and bigger, and finally becoming uncontrollable
Method used
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Embodiment 1
[0055] see figure 1 , an energy management method for an energy storage system, characterized in that it includes an energy management strategy that adopts the following steps: S1. Execute the PCS start-up strategy to complete the PCS start-up; S2. Generate a PCS adjustment command to realize peak shaving according to the peak and valley average time information of the electricity price Filling the valley; S3. Entering the instruction issuing protection logic, issuing the PCS adjustment instruction; the PCS adjustment instruction includes a power reference instruction and a mode reference instruction.
[0056] Further, see figure 2 , the PCS startup strategy adopts the following method:
[0057] S11. Obtain BMS alarm information, where the alarm information is divided into severe alarm, moderate alarm, and mild alarm;
[0058] S12. Judging whether there is a severe alarm, if so, the PCS is not powered on and ends the PCS startup strategy; if not, proceed to the next step; ...
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The invention belongs to the technical field of micro-grid energy management systems and relates to an energy management method for an energy storage system. The method is characterized by comprisingthe following steps that: S1, a PCS startup strategy is executed to finish PCS startup; S2, a PCS adjustment instruction is generated to realize peak clipping and valley filling according to the peak-valley leveling time information of electricity prices; and S3, instruction issuing protection logic is enabled, and the PCS adjustment instruction is issued, so that frequent instruction issuing canbe avoided, wherein the PCS adjustment instruction comprises a power reference instruction and a mode reference instruction. Compared with the prior art, the method adjusts the PCS adjustment instruction based on a state logic judgment method, peak clipping and valley filling and the maximum income of a user are achieved; the state of charge of a battery is no longer used as an instruction for charging or discharging the battery; the maximum efficiency operation of a retired battery system is achieved. The method is suitable for the simultaneous operation of a large number of PCSs and can achieve non-stop maintenance.
Description
technical field [0001] The invention relates to the technical field of microgrid energy management systems, in particular to an energy management method for an energy storage system. Background technique [0002] With the rapid development of new energy vehicles, especially electric vehicles, a large number of lithium batteries are used in the energy storage system of electric vehicles. However, lithium batteries have a limited life after all. When the battery capacity is lower than 80%, it can no longer meet the power demand of the car. Decommissioned, the direct disposal of decommissioned batteries will cause huge pollution to the environment. The traditional method is to dismantle and recycle, but the recycling cost is very expensive. For this reason, decommissioned batteries are used as energy storage systems, and the peak load of the power grid is realized through centralized inverters. Off-peak, frequency modulation and other methods can earn the difference in peak and...
Claims
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Login to View More IPC IPC(8): H02J3/32
CPCH02J3/32Y02E40/10
Inventor许泽阳夏耀杰杨杰
OwnerSHANGHAI ELECTRIC DISTRIBUTED ENERGY TECH CO LTD