摘要:
A method and system are disclosed for managing congestion in an electrical transmission network. The electrical transmission network includes Power Flow Control Devices (PFDs) that adjust the transmission capability of the electrical transmission network. The method includes determination of a reference generation schedule followed by setting up of an objective function based on the reference generation schedule, a power flow in the electrical transmission network, bids for regulation, an actual generation schedule, and set points of PFDs. An optimisation problem is solved to minimize the objective function for a set of decision variables and the set of decision variables is applied in order to minimize congestion cost in the electrical transmission network.
摘要:
The present disclosure is concerned with controlling distributing of electrical power in a power distribution region. To effectively control the distribution of power in the distribution region, the substation of the region is provided with a distribution controller or Intelligent Substation Control System (ISCS). The distribution controller is connected to various process devices, which in turn are connected to primary devices of the region. The process devices send data corresponding to the primary devices to the distribution controller, and the distribution controller includes a processor which proposes a set of actions based on the received data. Further, the distribution controller includes a coordinating device which selects the final action from the set of proposed actions. The final action is implemented on the primary devices of the distribution region.
摘要:
A method and system are provided for controlling a distribution of electrical power in a power distribution network having a first power distribution region and a second power distribution region. The first power distribution region can include first primary devices that interact with first process devices, and the second power distribution region can include second primary devices that interact with second process devices a distribution controller including a standardized description of the first region. A first distribution controller can be connected to the first process devices, can control a distribution of electrical power in the first power distribution region, and can identify, following a network reconfiguration, an orphan network section that is disconnected from the first region and connected to the second region. The first distribution controller can transmit a standardized description of the identified orphan network section to a second distribution controller connected to the second process devices.
摘要:
The present disclosure is concerned with controlling distributing of electrical power in a power distribution region. To effectively control the distribution of power in the distribution region, the substation of the region is provided with a distribution controller or Intelligent Substation Control System (ISCS). The distribution controller is connected to various process devices, which in turn are connected to primary devices of the region. The process devices send data corresponding to the primary devices to the distribution controller, and the distribution controller includes a processor which proposes a set of actions based on the received data. Further, the distribution controller includes a coordinating device which selects the final action from the set of proposed actions. The final action is implemented on the primary devices of the distribution region.
摘要:
A distribution controller is disclosed for controlling a distribution of electrical power in an assigned power distribution region. The controller is adapted to be communicatively connected to process or secondary devices (IEDs, RTUs) which in turn interact with primary devices of the assigned region. The controller includes a processing module executing algorithmic, logical or functional modules or client applications. The latter implement application function algorithms that calculate, based on process data from process devices connected to the controller, values of a power distribution quantity such as voltage, current, power flow, load, or a phasor quantity of the assigned region. The controller further includes, for the purpose of data exchange with the process devices communicatively connected to the controller, data servers. The controller is adapted for writing the output or results of the functional module, i.e. a value of the aforementioned power distribution quantity, to one of said data servers, and thus takes advantage of the existing controller structure.
摘要:
A method and system are provided for determining a length quantity of a power transmission line, which connects a first location with a second location. A first signal having a first carrier frequency is provided at the first location. The first signal is transmitted from the first location to the second location via the power transmission line. A second signal having a second frequency is provided at the second location. A first phase difference between the first signal and the second signal is measured at the second location, and the length quantity is calculated from the measured phase difference. In the system, a second receiver at the second location is configured to receive the first signal having the first carrier frequency from the first location. A frequency generator creates the second signal having the second frequency at the second location. The receiver includes a phase detection device configured to detect a first phase difference between the second frequency and the first carrier frequency at the second location.
摘要:
Methods for detecting network model data errors are disclosed. In some examples, methods for detecting network model data errors may include splitting a network model into a first plurality of portions, executing an algorithm on each of the portions, identifying a portion for which the algorithm is determined to be non-converged, splitting the identified portion into a second plurality of portions, repeating the executing, identifying and splitting the identified portion until a resulting identified portion is smaller than a predefined threshold, and examining the resulting identified portion to identify plausible data errors therein. In some examples, examining the resulting identified portion to identify plausible data errors therein may include executing a modified algorithm, which may include an augmented measurement set, on the identified portion.
摘要:
The present disclosure is concerned with the combined voltage or power flow control and damping of electromechanical oscillations in an electric power system by Flexible AC Transmission System (FACTS) devices or High Voltage DC (HVDC) transmission devices. To this end, information about a state or operating point of the power system is generated from suitable second system signals (y2) and a control parameter (cp) of a FACTS controller is derived therefrom. The control parameter and a first system signal (y1) are used in the calculation of a control command (u) defining the settings of the FACTS device. Following a change in the state of the power system such as a change in the topology of a transmission network, poorly damped or even unstable oscillations are avoided by appropriate re-tuning of the control parameter of the damping or stabilizing equipment.
摘要:
The invention relates to an electronic device and a method for controlling functionality of such an electronic device in relation to a display unit. The electronic device includes a base unit (3); a display unit (2), an orientation sensing arrangement and an orientation determining unit. The display unit (2) has a first surface area and a second surface area (13) joined to each other by a first and second opposite bounding side and is fastened to and movable in relation to the base unit (3). The orientation sensing arrangement comprises a first sensing unit (15) on the display unit (2) and a second sensing unit (16) on the base unit (3), which arrangement detects that the sensing units are able to communicate with each other and indicates this communication. The orientation determining unit then activates selected functionality of the electronic device based on the indication from the orientation sensing arrangement.
摘要:
A powder metallurgical combination is provided comprising an iron-based powder A comprising core particles of iron to which core particles nickel is diffusion alloyed and wherein said nickel diffusion alloyed to said core particles comprises 4-7% (preferably 4.5-6%) by weight of said iron-based powder A, and a powder B substantially consisting of particles of pure iron. Further a method is provided for preparing a powder metallurgical combination.