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The high penetration of distributed energy re sources (DER) in future Active Distribution Network (ADN) will bring great challenges to distribution network analysis. This paper presents a new methodology based on pseudo-sequential Monte Carlo (PSMC) simulation for the reliability assessment of distribution network with wind farms, photovoltaic generators and batteries. The proposed approach retains...
With the development of smart grid, the key to solve the problem of intelligent development of rural grid is in formation integration. This paper proposes to make a Marketing-Distribution-Dispatching integrated System in rural grid with the data acquisition and analysis of the electric energy data acquisition system, dispatching and distribution integrated system and marketing system, by the use of...
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...
This paper takes CIM_SVG based radial distribution feeder as the research object and designs an automatic map ping algorithm. Firstly, feeder's branches belong to different levels are preliminarily arranged in vertical and horizontal direction according to CIM_SVG based data. Then, a lever-to-lever trunk-branch model and corresponding branch-regional model which confirm the object oriented programming...
In this paper, an active distribution system state estimation (ADSSE) method with considering the characteristics of distributed generations (DGs) is proposed, in which the running and controllable characteristics of DGs are discussed and analyzed. The mathematical model which can reflect real time monitoring of the running and controlling state of DGs is established, and their running state variables...
The optimization schedule strategy of the active distribution system (ADS) is the core technology required to actively manage distributed energy resources (DERs) and to guarantee the economical utilization and safe operation of renewable energy generation. This paper investigates an optimal scheduling model for the ADS on the basis of ADS itself and DERs features, whose purposes are minimizing voltage...
There are mainly two kinds of state estimation measurements' model in recent research. One model considers that direct measurements and indirect measurements are uncorrelated, the other model considers that indirect measurements have strong correlation with the direct measurements where they are derived, and the correlation can be described as covariance elements in weight matrix. In fact, without...
Online monitoring of primary equipment such as circuit breakers is widely used in smart substations. By analyzing the data acquired from online monitoring systems, the circuit-breaker status can be monitored, and the health of the breaker can be determined comprehensively. Using an online monitoring system, tests were carried out to measure the mechanical characteristics of a hydraulic high-voltage...
According to the lack of unified, standardized testing methods for the feeder automation function of distribution automation system, this paper introduces a kind of simulation testing method realization of feeder automation function, which can provide technical reference for the bidding, and strengthen the quality control and operation management of power distribution automation system. This method...
The increasing penetration of large-scale wind generation in power systems will challenge the power system inertia due to the reason that the converter based variable speed wind turbines have no contribution to the system inertia. Traditionally, a doubly fed induction generator (DFIG)-based wind power plant naturally does not provide frequency response because of the decoupling between the output...
The power grid large-scale blackout and collapse always puts our society in risk. Power grid companies must strengthen the ability to deal with blackout and collapse. The complex power grid collapse and restoration process simulation and deduction system is designed. System structure and system functions are described. This paper focused on the key technologies including power system simulation oriented...
Due to fluctuation and randomness of wind speed, reliability of power system will be affected severely with increasing wind energy injected into power grid. In order to evaluate reliability of composite power system with wind farms, this paper proposes a new approach based on non-sequential Monte Carlo simulation (MCS) and the cross-entropy (CE), the basic idea is to find an optimal distortion for...
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,...
This paper is about the construction policies of distributed power generation. The distributed generation develops quickly in the whole world. The construction policies of each country can influence the industry development essentially. Construction policies of distributed generation can be considered from three aspects: the distributed power generation admission policy, the grid construction costs...
Focusing on the absence of systematic indicators and methodologies for evaluating environmental benefits of urban network planning quantitatively, this paper studies and pro poses a new comprehensive evaluation index system and method for urban power grid planning. The model is mainly composed of two parts: (1) A new quantitative index system including pollutant emission, carbon emission, environmental...
A novel method based on the Discrete Event Sys tem (DES) theory is proposed to solve the compatibility and interoperability issues among devices from different manufactures for the application of IEC60870-5-104 in distribution networks. In this paper, the DES method, which is described by a Finite State Machine (FSM), is employed to model the communication procedure based on the IEC60870-5-104. In...
Since the wind is random, intermittent and uncontrollable energy, conventional grid is difficult to adapt to the requirements of grid connected wind power. We can use inverter interface to improve quality and safety when wind power generation connected to grid. In this paper, a detailed study of the wind power on the series and parallel interface and topology, a detailed analysis the working principle...
In order to adapt to system requirements of "Operation" and achieve a high degree of integration about the county two grid business, Proposed a set of principles to differentiate construction to achieve a modern grid with automation, information technology, interactive features targeted distribution net work dispatching automation system building programs. For distribution automation management...
In order to achieve monitoring on poor contact in indoor power grid and avoid electrical fires, the discharge phenomenon caused by poor contact is experimented systematically. A discharge experiment model of poor contact is developed, in which the influence of the structural parameters of contact type and the gap distance on poor contact discharges are experimented, and the influence of the operating...
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