Three-phase unbalance adjustment system parallel input system, control method and device
A technology of balance adjustment and control method, which is applied in the direction of reducing asymmetry of multi-phase network, eliminating/reducing asymmetry of multi-phase network, etc. It can solve the problems that cannot meet the requirements of adjusting three-phase unbalance, so as to improve the quality of power supply and quickly Smooth adjustment, reduce loss effect
Active Publication Date: 2019-12-06
TIANJIN PINGGAO INTELLIGENT ELECTRIC +2
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[0011] The purpose of the present invention is to provide a parallel input system, control method and device for a three-phase unbalance adjustment system, which is used to solve the problem that a three-phase unbalance adjustment system cannot meet the requirements for adjusting three-phase unbalance
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[0035] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0036] The present invention as figure 1 The control method of the three-phase unbalance regulating system is mainly completed by an intelligent control unit and a power conversion unit, including the following steps:
[0037] The signal acquisition and processing unit collects information such as three-phase grid voltage and three-phase grid current in real time, obtains the current of the maximum current phase and the current of the minimum current phase in the three-phase current, and sends them to the intelligent control unit, and the maximum current phase of the intelligent control unit The actual value of the unbalance degree of the three-phase current can be obtained from the current and the current of the minimum current phase, and the calculation formula is as follows:
[0038]
[0039] In the formula, K is the actual value of thr...
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Disclosed are a system for putting regulating systems in parallel, a control method and apparatus, and a storage medium. The method comprises: when a primary three-phase imbalance regulating system is put into a power grid in parallel, the system simultaneously calculating the actual power of its own in real time, and when the actual power of the three-phase imbalance regulating system is greater than a set power threshold value, putting one or more secondary three-phase imbalance regulating systems into the power grid in parallel. The control policy of putting secondary three-phase imbalance regulating systems in parallel according to the condition of the actual power in a primary three-phase imbalance regulating system satisfies the regulation requirement of three-phase imbalance, realises the quick and smooth regulation of three-phase imbalance of an output side of a distribution transformer, and can effectively reduce the loss of a distribution line, and improve the power of the distribution transformer and improve the safe operation capability of a distribution system, thereby improving the power supply quality of a user.
Description
technical field [0001] The invention belongs to the technical field of electric power system distribution network automation, and in particular relates to a three-phase unbalance adjustment system parallel input system, a control method and a device. Background technique [0002] In the power system, the inconsistency of the three-phase current or voltage amplitude, and the amplitude difference exceeds the specified range, is called three-phase unbalance. The low-voltage distribution network is mainly a voltage network that is stepped down by a 10KV / 0.4KV distribution transformer. Since the distribution network is a mixed power grid for three-phase and single-phase users, the voltage distribution network often uses a three-phase four-wire system. powered by. The output side of the distribution transformer is connected to the low-voltage AC busbar of the three-phase low-voltage distribution network, and the low-voltage AC busbar is distributed into multiple low-voltage outgo...
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IPC IPC(8): H02J3/26
CPCH02J3/26Y02E40/50
Inventor 付明志王子驰刘易雄孟宪乐姚颖秦猛魏义涛葛媛媛高楠郭英杰彭朝德禹锦绣
Owner TIANJIN PINGGAO INTELLIGENT ELECTRIC