Power system load flow calculation method of electric vehicle
An electric vehicle and power flow calculation technology, applied in the field of power system, can solve the problems of high cost of battery packs and technicians, long charging time, large charging current, etc.
Pending Publication Date: 2020-06-05
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology
The charging current in the conventional charging mode is small, and the impact on the power system is relatively small, but the charging time is long, usually 5-8 hours; the charging current in the fast charging mode is large, and the charging time only takes 20 minutes to 2 hours, but the power grid The impact is large; the mechanical charging mode only needs to replace the battery pack at the charging station, which is fast and can be regulated and selected to charge the battery during the low power consumption period, so the impact on the power grid is also small, but the cost of the battery pack and technical personnel required is high , is still not popular in China
If a large number of electric vehicles are charged quickly during the peak period of electricity consumption, it will definitely have a great impact on the stability of the power system
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Embodiment 2
[0081] The calculation method provided by the embodiment of the present invention will be described in detail below.
[0082] Generally speaking, the factors that affect the charging load of electric vehicles include the initial state of charge, charging power, charging time, battery capacity, etc., and these factors are related to the type of vehicle, so it is difficult to achieve unified modeling. Therefore, the embodiments of the present invention classify vehicle types, and perform targeted modeling and simulation according to their characteristics.
[0083] Due to the advantages of electric vehicles with low noise, zero emissions, high driving stability and the support of relevant government policies, the number of electric vehicles in China has increased rapidly, mainly private cars, buses and taxis. Therefore, the embodiment of the present invention mainly simulates these three types of vehicles.
[0084] (1) Taxi charging mode
[0085] Due to the long working hours o...
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The invention provides a power system load flow calculation method considering an electric vehicle. The method comprises the steps that electrical parameter information of the electric vehicle and behavior habit information of a user are acquired; utilizing a Monte Carlo simulation method to obtain a simulation load curve of the electric vehicle according to the electrical parameter information and the behavioral habit information; structural parameter information of the power system is obtained, a high-order nonlinear load flow equation is established in combination with the simulated load curve, and a load flow variable is obtained through calculation by utilizing a Newton-Raphson method. According to the method, the Monte Carlo simulation method is adopted; a large amount of data can befitted to obtain the charging power curve of the electric vehicle; the charging power curve is introduced into load flow calculation; the influence of the electric vehicle on a power system can be effectively analyzed; and symbiotic development of the electric vehicle and a power network is assisted.
Description
technical field [0001] The invention relates to the technical field of power systems, in particular to a power system power flow calculation method considering electric vehicles. Background technique [0002] With the development of society and the improvement of living standards, global problems such as environmental pollution and fossil energy depletion are becoming more and more serious, and people are actively looking for new development paths. The emergence of new energy and related products has brought new hope to people. Taking advantage of this opportunity, electric vehicles that replace fossil energy with electric energy have been developed. The rapid popularization of electric vehicles has also brought great challenges to ensuring the stability of the power system. When they are connected to the grid for charging on a large scale, they will also bring power to the grid. To a certain impact. The charging demand of a large number of electric vehicles has brought a ...
Claims
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Login to View More IPC IPC(8): H02J3/06B60L58/12
CPCB60L58/12H02J3/06Y02T10/70
Inventor 应芝詹阳
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)