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Frequency stability is the main index of the stable operation of power system, frequency deviation too large or lasted long will resulted in electrical equipment abnormal operation or failure. Usually through primary frequency regulation and secondary frequency regulation make electricity power balance, eventually reached a stable frequency. With the popularity of electric vehicles, electric energy...
On the basis of short-term power load data, an active set algorithm based energy storage system optimization strategy in the distribution network is presented in this paper. When energy storage system is connected to the power grid, the original load and output power of energy storage system is considered as the new network load. In order to improve the reliability and power supply capability of the...
With the advancement in science and technology and the ever increasing demand for energy, the development and applications of electric vehicles has become more and more extensive. The application of a large number of electric vehicles will have a significant impact on the electric power grid. This paper analyzes the factors that influence the access of electric vehicles to the power grid, and constructs...
The emerging smart grid paradigm enables more efficient use of energy through optimizing the local grid operation. Conservation Voltage Reduction (CVR) is an application which aims at reducing the power consumption by decreasing the voltage level. Another important application is the Volt Ampere Reactive (VAR) control which aims at flattening the voltage profile and improving the power factor, which...
In order to balance production and consumption on the power grid, efforts are mostly made on the production side. Demand response is a classical solution consisting in harnessing electricity consumption to allow the introduction of renewable energy sources and self-production in the energy mix. In this context, the main problem is to coordinate the network nodes, considered here as agents, in order...
Cyber Physical System (CPS) is a new concept of integration of industry and information technology, and it will affect power grid in many aspects. Active Distribution Network is the basic form of CPS. The DGs' feeder power control has been used in ADN now, but the effect of intermittent loads has not been considered. This paper firstly analyzes ADN's technology status combining with CPS. On the basis...
VF (Variable Frequency) based motor drive, which occupies a large proportion in total power load, is growing up rapidly these years. It shall affect the load model of power system greatly, for their characteristic is quite different from that of traditional asynchronous motor drive. Firstly, both the simulation and physical experiment on VF motor are carried out with voltage drop disturbs, and the...
As the novel loss management model, the Energy Performance Contract (EPC) has been gradual becoming the new management style in China. However, the EPC has been not formed a unified standard due to lacking of the mature baseline of the loss reduction index and the differentiated energy efficiency benchmarking model. In order to solve these problems, the optimal allocation of electric equipments and...
Replacing a portion of current light-duty vehicles (LDVs) with plug-in hybrid electric vehicles (PHEVs) offers the possibility to reduce the dependence on fossil fuels together with environmental and economic benefits. However, charging a myriad of PHEVs will certainly introduce a huge new load to the power grid. In the framework of the development of a smarter grid, the primary focus of the present...
In the advent of multinational cooperation within the Southeast Asian region, massive connectivity for both goods and services has been envisioned. Energy systems are ought to be collaborated to jointly develop a borderless electricity industry and one of which is the Philippines-Sabah interconnection to be inaugurated in 2020. This paper presents an analysis on the small signal stability and transient...
In traditional generation plan management, the completion schedule of the annual contract energy and plants' equaled load ratios are mainly considered, rather than the implementation of the generation scheduling. As the direct-supplying energy increases, the proportionality of power plants' generated energy is observably influenced, thus the power grid's security constraints are more sharpened or...
Rapid growth of air conditioning (AC) has caused large effect on safe and economical operation of power grid especially in summer. The research on the AC load monitoring is of great significance for improving the stability of power grid. Non-intrusive load monitoring (NILM) is gaining attention due to many attractive features, such as low cost, low-complexity and easy promotion. A NILM of AC model...
A photovoltaic power generation (PV) with a battery system is proposed to stabilize output power fluctuation from PV which depends on the whether condition for a power grid friendly. We propose a novel method for capacity designing of each device in the system. The optimum capacity of each device is estimated by the method which needs an annual amount of solar radiation data. A grid dependency (GD)...
In this paper we review and expand our previous work on developing random topology networks as a way to generate synthetic power grid data. We first present an algorithm that is able to generate the small-world “eletric” topology appropriate for a transmission network. Next we re-examine the definitions of the proposed numerical measure called “Bus Type Entropy”, to characterize the correlated assignment...
With increasing PV power penetration in the modern power grid, a cost-effective solution to address PV intermittency becomes more and more compelling. The ramp rate of PV power can reach 60% of its rated capacity in just 30 seconds. Energy storage is a technically feasible solution to suppress the adverse impacts of injecting intermittent power output with such a high ramp rate into the grid, but...
Phase balancing is essential to safe power system operation. We consider a substation connected to multiple phases, each with single-phase loads, generation, and energy storage. A representative of the substation operates the system and aims to minimize the cost of all phases and to balance loads among phases. We first consider ideal energy storage with lossless charging and discharging, and propose...
The aim of this paper is to present a graphical user interface (GUI) toolbox that has been developed for the GridLAB-D simulation platform. The toolbox provides the users with a friendly interface facilitating the design and simulation of experiments related to the operation of the electric power grid. The GUI, which is named MatGridGUI, integrates GridLAB-D platform with the Matlab software functions...
This paper proposes a robust optimization (RO) model for bidirectional dispatch coordination of large-scale plugin electric vehicles (PEVs) in a power grid in which the PEVs are aggregated to manage. The PEV aggregators are considered as a type of dispatchable demand response and energy storage resource with stochastic behaviors, and can supply load or provide ancillary services such as regulation...
With the popularization of Electric Vehicles (EVs), the out-of-order random charging behavior of large-scale EVs will bring new challenges to the safe and economic dispatch of power system. This paper divides the driving area into four zones according to the functional area of distribution network, and a regional time-of-use (RTOU) electricity price model is proposed considering its spatial and temporal...
In the development of smart grid at distribution level, the realization of real-time nodal pricing is one of the key challenges. The research work in this paper implements and studies the methodology of locational marginal pricing at distribution level based on a real-world distribution power system. The pricing mechanism utilizes optimal power flow to calculate the corresponding distributional nodal...
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