摘要:
The invention relates to a base element (ST1, ST2, ST3) for receiving an overvoltage protective module (M1, M2, M3) for use in a bus system, having a first bus connection arrangement (BK1) for contacting a first bus potential (L1), a second bus connection arrangement (BK2) for contacting a second bus potential (L2), a third bus connection arrangement (BK3) for contacting a signal bus (L3), wherein the signal bus in a first state indicates the occurrence of a fault and in a second state indicates the non-occurrence of a fault, wherein a fault indicates a missing or incorrectly received or faulty overvoltage protective module (M1, M2, M3), wherein the first and second bus potential are to be used to supply arrangements on the overvoltage protective module (M1, M2, M3), wherein the base element further comprises an electronic monitoring arrangement (UE1), wherein the electronic monitoring arrangement (UE1) identifies whether an overvoltage protective module (M1, M2, M3) is received, wherein, if an overvoltage protective module (M1, M2, M3) is received in the base element (ST1, ST2, ST3), the second state is signalled via the signal bus, and, if no overvoltage protective module (M1, M2, M3) is received in the base element (ST1, ST2, ST3) or if the overvoltage protective module (M1, M2, M3) is received incorrectly or if the overvoltage protective module (M1, M2, M3) is faulty, the state of the signal bus remains unchanged, wherein the base elements (ST1, ST2, ST3) can be clipped onto a mounting rail (TS1, TS2), and the first bus potential (L1), the second bus potential (L2) and the signal bus (L3) are guided in a recess in the mounting rail (TS1, TS2).
摘要:
A data surge protection module which can be added to data and control networks not having such protection. The use of quick connect/disconnect connectors allows the rapid installation or replacement of such modules. a built in ground plate and a braided low impedance conductor offer alternative grounding methods for the module. The module employs two or more diode steering bridges and uses a diode as the surge suppression element.
摘要:
In steady-state voltage stability analysis, as load increases toward a maximum, conventional Newton-Raphson power flow Jacobian matrix becomes increasingly ill-conditioned so power flow fails to converge before reaching maximum loading. A method to directly eliminate this singularity reformulates the power flow problem by introducing an AQ bus with specified bus angle and reactive power consumption of a load bus. For steady-state voltage stability analysis, the angle separation between the swing bus and AQ bus can be varied to control power transfer to the load, rather than specifying the load power itself. For an AQ bus, the power flow formulation is only made up of a reactive power equation, thus reducing the size of the Jacobian matrix by one. This reduced Jacobian matrix is nonsingular at the critical voltage point, eliminating a major difficulty in voltage stability analysis for power system operations.
摘要:
A data surge protection module can be added to data and control networks not having such surge protection. The use of quick connect/disconnect connectors allows for the rapid installation and/or replacement of such modules. A built-in ground plate and a braided low impedance conductor offer alternative grounding for the module. The module employs two or more diode steering bridges and uses a diode as a surge suppression element.
摘要:
A medium voltage power supply is disclosed as including plural medium voltage power lines and plural medium voltage switchboards, connected by respective medium voltage power lines. The medium voltage switchboards are each provided with a respective electrical protection equipment under the IEC 61850 standard and with respective medium voltage signal couplers driven by the electrical protection equipment to transmit and receive Generic Object Oriented Substation Event messages through the medium voltage power lines.
摘要:
A communication system includes functional modules, wherein at least one functional module includes a processing unit and at least one functional module includes a controllable device. The modules are powered by an alternating voltage at a frequency and are electrically associated by a power bus and a communication bus. The processing unit provides a communication signal to the communication bus for interaction between the functional modules through a plurality of sets of high frequency pulses arranged to repeat at a predetermined repetition frequency substantially greater than the frequency of the voltage, and each set of high frequency pulses forms an information pulse corresponding to at least one bit of a communication protocol. Filters are disposed between an electric energy power supply and the functional modules for permitting the passage only of frequency components of an electric signal greater than the voltage frequency of the electric energy power supply.
摘要:
A data surge protection module can be added to data and control networks not having such surge protection. The use of quick connect/disconnect connectors allows for the rapid installation and/or replacement of such modules. A built-in ground plate and a braided low impedance conductor offer alternative grounding for the module. The module employs two or more diode steering bridges and uses a diode as a surge suppression element.
摘要:
An intelligent electronic device (IED) may obtain a voltage measurement matrix based on an arrangement of a transformer in a power system. The IED may obtain a delta connection compensating angle based on the location of the circuit breaker and the transformer arrangement. The IED may obtain voltage measurements of the transformer. The IED may determine a residual flux value of the transformer based at least in part on the voltage measurements, the voltage measurement matrix and the delta connection compensating angle. The IED may send a signal to a circuit breaker of the transformer to connect the transformer to the power system based at least in part on the system voltage and residual flux value.
摘要:
A smart switch system comprising one or more switching devices. Each one of the switching devices include a first pin, a second pin, a current indication pin, a system current limit pin and a power switch for electrically coupling the first pin to the second pin when the power switch is turned on. Each switching device may adaptively adjust an operation current limit value of the switching device based on a system total current limit value received or set at the system current limit pin and a system current indication signal received at the current indication pin.
摘要:
In steady-state voltage stability analysis, as load increases toward a maximum, conventional Newton-Raphson power flow Jacobian matrix becomes increasingly ill-conditioned so power flow fails to converge before reaching maximum loading. A method to directly eliminate this singularity reformulates the power flow problem by introducing an AQ bus with specified bus angle and reactive power consumption of a load bus. For steady-state voltage stability analysis, the angle separation between the swing bus and AQ bus can be varied to control power transfer to the load, rather than specifying the load power itself. For an AQ bus, the power flow formulation is only made up of a reactive power equation, thus reducing the size of the Jacobian matrix by one. This reduced Jacobian matrix is nonsingular at the critical voltage point, eliminating a major difficulty in voltage stability analysis for power system operations.