Three-phase imbalance power flow calculation method based on compensation algorithm
A power flow calculation and three-phase technology, applied in the field of distribution network analysis, can solve problems such as difficulty in ensuring power flow accuracy, convergence and calculation speed effects
Active Publication Date: 2020-11-06
GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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Problems solved by technology
Among them, the constant impedance equivalent method has the problem that the power flow accuracy is difficult to guarantee as the scale of the power grid continues to expand; while the Lorton equivalent method relies on a large number of equivalent modeling work, and the size of the current source must be corrected each time. expansion, there is a problem that its convergence and calculation speed are affected
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[0034] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.
[0035] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical", "horizontal", "left", "right", "upper", "lower", "front", "rear", "circumferential" and...
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The invention relates to the technical field of power distribution network analysis, and discloses a three-phase imbalance power flow calculation method based on a compensation algorithm. By combininga compensation algorithm with a three-phase power injection load flow calculation method, load flow calculation of various distributed power supplies can be simply and conveniently processed. When three-phase imbalance power flow calculation is carried out, in the next iteration process, the correction voltage amplitude and the correction voltage phase angle obtained according to the previous iteration are substituted into a branch power and bus voltage calculation formula to obtain branch power and bus voltage, and the branch power and the bus voltage are compensated into the injection powerof the next iteration. The iteration process is repeated until the voltage amplitudes and phase angles of all nodes meet convergence conditions. According to the three-phase imbalance power flow calculation method based on the compensation algorithm, power flow calculation can be flexibly carried out on a power grid system of a constant-power load in triangular connection, and meanwhile the method has the advantages of being good in robustness, high in convergence precision, high in convergence speed and the like.
Description
technical field [0001] The invention relates to the technical field of distribution network analysis, in particular to a method for calculating a three-phase unbalanced power flow based on a compensation algorithm. Background technique [0002] With the continuous development and in-depth reform of the smart grid, more and more distributed power sources are integrated in the distribution network. The form of access to the grid is also more flexible, which changes the single power supply mode of the traditional distribution network, and also has a certain impact on functions such as voltage distribution, power quality, power supply reliability, and relay protection. Power flow calculation is the basis of distribution network operation, control and dispatch. The existing three-phase unbalanced power flow calculation methods mainly include the following two methods when dealing with distributed power sources with constant power delta grid connection: constant impedance equival...
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IPC IPC(8): H02J3/06H02J3/26H02J3/38
CPCH02J3/06H02J3/26H02J3/38H02J2203/10H02J2203/20Y02E40/50
Inventor 朱璐陈莎莎陈国炎王勇李光茂杨森邓剑平乔胜亚
Owner GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD