The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Peak-shaving and valley-filling are important respects while making a scheduling plan, especially faced with the situation when Ultra-High Voltage (UHV) is introduced into the grid. With the target for calculating the cost and effectiveness of different peaking strategies continuously rather than only at the optimal point, this paper proposes an improved peaking model. The values of the objectives...
In an interconnection, frequency error and interchange power errors on tie lines are two sorts of important indices reflecting the control performance. However, these two indices may be impacted when a DC transmission line is put into operation, or an AC tie line fault occurs. In this paper, a method for evaluating the impacts is proposed, based on the theory of Area Control Error (ACE). First, the...
At present, electric power industry is in a period of rapid development and the assessment of regional power development captures growing attention. Through the evaluation process, we can deepen the understandings of regional development ability and puts forward suggestions for the further development. However, the understanding of regional power development is still at the perceptual level now and...
The common information model (CIM)/ extensive markup language (XML) was taken as the carrier to realize the mutual connection interface technology of isomerized electric power simulation software. This paper raised a kind of equal value electric power network model. The corresponding properties of classes in the model were expanded to save the CIM model element objectives, which overcame the shortcomings,...
An energy-based method to locate oscillation sources in power systems is proposed. The energy is identical to the transient energy. The amount of energy is consistent with the oscillation amplitude, and then the component producing energy has negative contribution to the damping and is considered as the oscillation source. The consistency of energy dissipation with damping torque of a generator is...
According to the dynamic voltage security control, the concept and method of the hybrid control system are introduced, and the dynamic hybrid automatic voltage control (D-HAVC) system is realized. The hybrid hierarchical control system model based on the hybrid theory is set up firstly. In the modelpsilas high layer, the power systempsilas differential-algebraic-equations are linearized, and the eigen-matrixpsilas...
The concept of hybrid power control system is introduced to the power systems' voltage control, and the static hybrid automatic voltage control (HAVC) system has been established in the paper. Firstly, we set up a new hybrid hierarchical voltage control system model based on the hybrid theory, and design the operating process. Then we define the stability event and the economic event to drive the...
This paper presents a design approach to nonlinear feedback excitation control of power systems with unknown disturbance and unknown parameters. It is shown that the stabilizing control law with desired L 2 gain from the disturbance to a penalty signal can be designed by a recursive way without linearization. A state feedback law is presented for the case of the system with known parameters,...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.