EEAC-based quantitative method for influence of energy storage charging and discharging on transient stability
A technology of transient stability and quantitative methods, applied in the direction of AC network load balancing, etc., can solve problems such as poor control effect, difficulty in adapting to power system faults or disturbances, and inaccurate control process, so as to achieve the effect of improving transient stability
Active Publication Date: 2020-06-05
POWERCHINA FUJIAN ELECTRIC POWER SURVEY & DESIGN INST CO LTD
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Problems solved by technology
However, there is no quantitative method for the control effect of energy storage, which may lead to inaccurate control process, poor control effect, and difficulty in adapting to power system failures or disturbances.
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[0024] Best practice:
[0025] The quantification method based on EEAC for the impact of energy storage charging and discharging on transient stability includes the following steps:
[0026] 1) Obtain the current charging and discharging status and power of the energy storage system;
[0027] 2) Obtain the frequency information of all buses connected to the energy storage system, and perform difference calculation:
[0028] Δf i =f ic -f i0 (1)
[0029] Among them, Δf i Indicates the frequency difference of the i-th bus, f ic Indicates the frequency of the i-th bus fault clearing time Tc, f i0 Indicates the stable moment T of the i-th bus 0 Frequency of.
[0030] 3) Select the control measures of the energy storage system after the fault according to the frequency difference:
[0031] If Δf i The energy storage system corresponding to >0 needs charging control;
[0032] If Δf i The energy storage system corresponding to <0 needs discharge control.
[0033] 4) Qu...
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The invention relates to a charging and discharging transient stability control mode of an energy storage system, and in particular relates to an EEAC-based quantitative method for influence of energystorage charging and discharging on transient stability. The method comprises the steps that firstly, the current charging and discharging state and power of the energy storage system are obtained, then frequency information of all buses connected with the energy storage system is obtained, difference calculation is carried out, control measures of the energy storage system after faults are selected according to the frequency difference, and finally quantitative processing is carried out on the control effect of the energy storage system on transient stability based on EEAC. According to theinvention, the transient stability of the energy storage system can be improved by balancing the unbalanced power of the system; and the control effect of the energy storage system can be quantified based on EEAC, so that the method can well adapt to the situation that a power system breaks down or disturbs.
Description
technical field [0001] The invention relates to a charging and discharging transient stability control method of an energy storage system, in particular to a quantification method based on EEAC for the influence of energy storage charging and discharging on the transient stability. Background technique [0002] Power system transient stability control is an important measure to ensure the safety and stability of the power system. After the power system suffers a large disturbance, the power between the systems cannot be kept in balance. According to the extended equal-area rule, in order to maintain the stability of the system, it is necessary to reduce the acceleration area and increase the deceleration area after the system fails, so as to maintain the synchronous and stable operation of the system. Based on the EEAC principle, the energy storage system in the system can reduce the acceleration area and increase the deceleration area, and improve the transient stability o...
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IPC IPC(8): H02J3/28
CPCH02J3/28
Inventor 陈旭海毛行奎陈佳桥陈恺周源谢建华王金友叶春张宜旺董纪清
Owner POWERCHINA FUJIAN ELECTRIC POWER SURVEY & DESIGN INST CO LTD