Control method for limiting maximum swing angle of complex electric power system based on EEAC
A technology of power system and swing angle, which is applied in the field of power system, can solve problems such as unstable accidents, time-consuming and manpower consumption, and achieve the effect of precise control
Inactive Publication Date: 2018-05-08
FUZHOU UNIV
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[0003] However, in the existing off-line or online stability control calculation strategy table, for unstable accidents, it is necessary to repeatedly give cut-off control measures based on experience to try out an effective cut-off control scheme. For the combination of a large number of fault samples and operating conditions, this method will consume a lot of time and manpower
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[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0028] Such as figure 1 As shown, a control method based on EEAC to limit the maximum swing angle of a complex power system, according to the time-domain simulation results of the generator, that is, power angle, angular velocity, mechanical power, electromagnetic power and inertial time constant information, when the system is unstable, Quickly calculate the control quantity required to limit the maximum swing angle of the system under the current failure mode, including the following steps:
[0029] Step S1: given complex power system fault category, fault clearing time parameters;
[0030] Step S2: According to the time-domain simulation results of the generators, obtain the damping, power angle, angular velocity, mechanical power, electromagnetic power and inertial time constant information of each generator during the fault period and after the fa...
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The invention discloses a control method for limiting a maximum swing angle of a complex electric power system based on an EEAC. According to a time-domain simulation result of a generator, namely thepower angle, the angular velocity, the mechanical power, the electromagnetic power and the inertia time constant information, when the system is unstable, the power angle corresponding to an unstableequilibrium point is calculated, the maximum swing angle of the complex electric power system is given, the residual acceleration energy of the maximum swing angle of the system is calculated, and the control quantity required by limitation of the maximum swing angle of the system in the current fault mode is calculated. According to the method, the required control quantity can be rapidly calculated in an offline manner, the obtained control quantity is accurate, and the maximum swing angle of the system is less than and closer to the limited swing angle after the implementation of the control quantity.
Description
technical field [0001] The invention relates to the technical field of power systems, in particular to a control method for limiting the maximum swing angle of a complex power system based on EEAC. Background technique [0002] With the rapid development of modern power systems in the direction of ultra-high voltage, large capacity, AC-DC hybrid interconnection, etc., as well as the rapid growth of loads, the dynamic characteristics of modern power systems such as coherence, instability modes, and key transmission sections have become increasingly complex. The "three lines of defense" is the successful experience of long-term safe and stable operation of my country's power grid. The second line of defense is to ensure that the power grid can continue to maintain stable operation in the event of a serious failure by taking necessary measures such as machine cutting and load shedding. State, and the strategy table is the core and foundation of the second line of defense. [00...
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IPC IPC(8): H02J3/00
CPCH02J3/00H02J3/001H02J3/002H02J2203/20
Inventor 王怀远江岳文林建新温步瀛
Owner FUZHOU UNIV