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With the popularization of electric vehicles, electric vehicles in the active distribution network continue to expand the scale. Electric vehicles access to the active distribution network to participate in the economic dispatch with other distributed powers. This can reduce the total cost of active distribution network. In addition, the owners of the electric vehicle can make profit when their vehicles...
It is very important for Operations Management System (OMS) and big data analysis application to improve the data quality of Electric Vehicle (EV) charging service. This paper focuses on the charging transaction record data from the Beijing EV charging OMS, and analyzes error types and distributed locations of the abnormal data. Based on the mathematical logic among various kinds of operation data,...
EV (Electric vehicle) and PV (photovoltaic) load will bring about some influence to the power system when is connected to gird, such as the change of load characteristics, increase the peak valley difference and etc. At the same time the application of inverter will bring about reverse power threat to the operation and maintenance of power grid. To weaken the influence above, the technology named...
Electric vehicles (EVs) are new power loads of power systems. It is important to model the charging process of EVs in power system numerical simulation. This paper proposes a methodology for modeling of EV loads applicable to power flow calculation and other quasi-steady state analysis. The numerical methodology of EV load modeling is expounded from the DC and the AC side of charging EVs. In the DC...
As public service infrastructure of the city, the locating and sizing of electric vehicle charging stations should be based on actual charging demand. Obtaining the path traffic flow via introducing the stochastic user equilibrium (SUE) assignment model, the size configuration method of charging stations is proposed by combining with the user travel behavior rules to simulate charging demand of the...
The power battery of electric vehicle may be limited by battery safety issues and power problems. The key points of this paper are firstly it combines discrete Fréchet distance method with discharge curve identification method, and then it proposes a kind of new state of health diagnose method base on line testing platform. Through the CAN communication module, the system could control the power battery...
By studying on the coordination between the system reliability level and the EV grid-integration scale, the system acceptance capacity of EVs can be assessed from a new point of view. In this paper, a model for the charging loads of three types of EVs and a coordinated strategy with time-of-use price (TOU) are established. Then, the maximum acceptable capacity, reliability sensitivity and other indicators...
As the application of electric vehicles expands, their charging power demand will influence the operation of the power grid. This paper firstly considers the relevant factors which influence the charging power demand; by using the Monte Carlo method to calculate the large-scale electric vehicle charging power demand. Based on the problem that the large-scale electric vehicle's disordered charging...
Compensation mode has an important influence on the efficiency and power characteristics of contactless charging system. Analyze the necessary of power compensation for the loosely coupled transformer based on electromagnetic inductive contactless charging system structure of electric vehicle. By analyzing the four kinds of compensation models, the S/S model is selected due to its high system efficiency...
Reduce the consumption of exhaustible natural re sources is an important feature of smart grid. By integrating power generated from renewable resources and implementing environmentally benign end-devices such as electric vehicles, smart home appliances and etc, smart grid creates sustainability values. This article proposes a value analysis model of smart grid from the view point of sustainable development...
Electric vehicles have indeed contributed a lot to the energy savings and environment protections, while it leaves a worldwide problem that is how to recycle its core component-the battery. A specific economic analysis of applying the used EV battery to the commercial electricity customers is carried out based on actual data of the real-time load curves and the electricity prices collected from the...
Economic operation of complicated distribution network is an important problem. A bilevel optimal operation model of complicated distribution networks with microgrids integration is built. In the model, the day-ahead optimal operation of complicated distribution networks is on the upper-level and the optimal operation of the microgrid is on the lower-level. Electricity exchange price constraints are...
The rapid development of plug-in hybrid electric vehicles and renewable generation brings new challenges to the secure and economic operation of power systems. A reactive power optimization model based minimizing network loss is established, considering electric vehicle stochastic charging /discharging and uncertain outputs of wind turbines. To improve the accuracy and global searching capability,...
In order to enhance the frequency response capability of the power systems, the EV (electric vehicle) clusters and AC (air conditioner) clusters are used as response resources to maintain the system frequency within an acceptable range. The frequency control strategies of the EV clusters and AC clusters are given respectively. A load assessment index is proposed to evaluate the available response...
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