Serwis Infona wykorzystuje pliki cookies (ciasteczka). Są to wartości tekstowe, zapamiętywane przez przeglądarkę na urządzeniu użytkownika. Nasz serwis ma dostęp do tych wartości oraz wykorzystuje je do zapamiętania danych dotyczących użytkownika, takich jak np. ustawienia (typu widok ekranu, wybór języka interfejsu), zapamiętanie zalogowania. Korzystanie z serwisu Infona oznacza zgodę na zapis informacji i ich wykorzystanie dla celów korzytania z serwisu. Więcej informacji można znaleźć w Polityce prywatności oraz Regulaminie serwisu. Zamknięcie tego okienka potwierdza zapoznanie się z informacją o plikach cookies, akceptację polityki prywatności i regulaminu oraz sposobu wykorzystywania plików cookies w serwisie. Możesz zmienić ustawienia obsługi cookies w swojej przeglądarce.
Over the recent decades, maintenance policies have involved from Corrective Maintenance (CM) to Preventive Maintenance (PM) and then to Condition Based Maintenance (CBM). In this context, this paper first presents a brief review on the development of maintenance policies with emphasis on CBM. In CBM, we classify the literature into three classes: CBM1, CBM2, and CBM3. And then we summarize the maintenance...
Doubly-fed induction generator (DFIG) is one of important drive systems for wind turbine. It has been widely applied in the power grid today because of its less losses and simpler control strategies. Meanwhile, during voltage dips, the DFIG kept connecting with the grid can provide some reactive power so as to recover the grid voltage, which is called the ability of low voltage ride-through (LVRT)...
For the past, the substation planning mostly focused on the target year planning, and the process from the current year to the target year was always overlooked. Although there were few studies taking these into account, they mainly based on the current year and positively pushed to target years, this method was hardly to be operated and it ignored the importance of the target year planning. In this...
Wind power generation brings new challenges to the security operation of power system due to its intermittency and uncontrollable. There are some special characters in China, such as large-scale, long distance transmission and lack of flexible regulating power. For short-term power dispatching, it is an important issue to obtain the security limit of wind power integration capacity. This paper presents...
At present, the business model for E-mobility services has become a core issue. A sound business model should be able to guarantee the sustainable development of E-mobility services and effectively promote the rapid development of electric vehicle (EV) industry. The optimization of overall benefits for the whole industry chain should be the prime principle in the design of business model. A set of...
A detailed operation simulation based planning alternative evaluation method of power system with large-scale wind power is proposed in this paper, since the traditional power system planning evaluation methods are not applicable because of the intermittent and uncertainty of wind power. The evaluation framework of this method is established with power system operation simulation in the chronological...
Serious contingencies may cause some generators to run out of step, so splitting power system into individual partitions to avoid oscillation between asynchronous generator groups is one important measure to prevent system from collapse. To find the optimal location of splitting surface which minimizes the total imbalance power of each island is NP hard. As inspired by the multilevel k-way partitioning...
Wireless sensor and actuator networks (WSANs) have been widely implemented in smart grid to monitor and control their environment. We consider the sensor selection schemes for parameter estimation in energy constraint WSANs. To prolong the network lifetime and optimize energy consumption, only sensors experiencing favorable conditions will participate in the estimation process. In this paper, we study...
For large-scale wind power access to the grid based on thermal power peaking, the structure of power and peaking capability restrict the accessing of large-scale wind power. Large-scale energy storage system can achieve load space-time translation and improve security and economy of power grid operation. In this paper, considering factors of storage cost, wind power investment cost and wind power...
In order to solve the problem of voltage stability existed in wind farms interconnected to power system, a computing method taking the statistical law of wind output power into account is proposed to determine the reactive power compensation capacity that is interconnected to power system. Based on the statistical law of wind power and considering the characteristics of reactive power and active power...
Conventional Optimal Power Flow (OPF) minimizes line loss snapshot by controlling generation output and transformer tap position. Distributed energy storage system (DESS) that locates close to load can provide more flexible and effective control to reduce overall line loss. A dynamic optimal power flow (DOPF) method considering energy storage units is adopted to model and analyze line loss reduction...
In recent years, with the construction of UHV power grid and the promotion of smart grid, inter-regional energy transactions in China has achieved rapid development, the market is becoming more active and the scale of inter-regional energy transactions is expanding further. With the steady improvement of power market supervision system, inter-regional energy transactions not only need to meet higher...
As a global optimization method based on probability, Ant Colony Search (ACS) algorithm is suitable for solving combinatorial optimization problem of Complex system. According to the weakly mesh structure feature of the distribution containing distributed generations (DG), the paper finds the ratio of the capacity of DG, load and the number of ants in the area of distributed generations supply, especially...
A local search strategy for static transmission expansion planning (TEP) is presented in this paper. Removing one circuit in current transmission plan may make some components overloaded, some buses isolated or the remained system intact. Based on the three situations, three sets known as local bus, local circuit and effective local circuit are defined, and accordingly the neighborhood of current...
As renewable generation and clean energy source, photovoltaic (PV) generation has a promising prospect. China has now established a number of MW solar power plants. With certain control strategy and under certain operating conditions, PV generation is able to demonstrate good reactive power supporting characteristics for future smart distribution system. This paper has done some preliminary researches...
The optimal configuration model based on 2-layer programming was built using chance constrained programming method. The upper optimization model determines the optimal location and capacity of DG-C while the lower optimization model determines the optimal switching strategy of C. An improved genetic algorithm which can be easy to handle discrete variables was chosen for the optimal solution. The simulation...
Self-healing is a critical and desirable feature for electric power systems. Following an outage, it is critical to restore system back to a normal operation condition as efficiently as possible. The advanced decision support tools are needed to assist system operators to restore a grid from major outages efficiently and safely and enhance the resilience of a smart grid. In this paper, optimization...
Based on the condition of power grid, the choice of strong and smart grid in China is analyzed. The concept and objective of strong and smart grid are proposed. Smart Grid is a long-term and comprehensive systemic project, its coordinated development issues has been analyzed from four main sides, in order to ensure the efficient, orderly and coordinated development, and to realize the comprehensive...
We revisit the loss reduction problem for network reconfiguration in power distribution systems in this paper. Besides the conventional line power loss (LPL), in our model, we introduce a new concept - the transient power loss (TPL), which is mainly induced by the communication asynchronization and response delay. TPL is often overlooked in previous works because it's hard to measure in the conventional...
A novel fast heuristic algorithm for operating reliability constrained unit commitment is proposed in this paper. The loss-of-load probability constraints are fulfilled by the iteration between the traditional spinning reserve constrained unit commitment and the operating reliability estimation. The features of the approach are the fastness of the algorithm and the robustness of the results. Even...
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.