摘要:
A remote metering system comprises a multi-phase mains supply system (10) having a control unit (CS) and a plurality of single-phase consumer meter units (M1-M3) with messages passing between the meter units and the control unit. For phase determination, the control unit and each meter unit includes synchronizing means (CTR1) for synchronizing its message processing to its phase of the mains supply (or one particular phase, for the control unit). The relative phases of the control unit and a meter unit can then be determined, by a comparator (17), from the timing of a message passing between them relative to the phases to which those units are synchronized.
摘要:
System zur Übertragung von Energie und Daten, insbesondere umfassend eine Halbwellensteuerung, mit einer mit Netzphasen verbundenen Steuereinheit, wobei in der Steuereinheit eine der Netzphasenspannung entsprechende Spannung, insbesondere eine mit einem aus Widerständen ausgeführten Spannungsteiler (R1, R2) erzeugte Spannung, einer Diode (D1) zugeführt wird, deren Ausgangssignal als Steuerspannung für einen spannungsabhängigen Schalter (Th) verwendet wird, und zum Aufladen einer Kapazität (C3), insbesondere Kondensator (C3), dient, insbesondere wobei der Aufladestrom über eine Diode (D2) geführt ist.
摘要:
Für eine einfache und zuverlässige Datenkommunikation in einer Anordnung aus einer Anzahl von seriell verschalteten Wechselrichtern (3 1 , 3 2 , … 3 n ) und einer Netzüberwachungseinheit (5) ist vorgesehen, der an der elektrischen Last (4) anliegenden Netzspannung (V N ) durch die Netzüberwachungseinheit (5) einen Synchronisationspuls (10) zu überlagern, der durch die Wechselrichter (3 1 , 3 2 , … 3 n ) zur zeitlichen Synchronisierung detektiert werden kann.
摘要:
The invention relates to the transmission of energy and data, in particular comprising a half-wave controller, having a control unit connected to network phases, a voltage that corresponds to the network phase voltage, in particular a voltage generated with a voltage divider (R1, R2) formed from resistors, being supplied to a diode (D1) in the control unit, the output signal of which diode is used as a control voltage for a voltage-dependent switch (Th), and being used to charge a capacitance (C3), in particular capacitor (C3), the charge current in particular being routed via a diode (D2).
摘要:
Apparatuses (10) comprise first circuits (1) for detecting problems in or near loads (111) powered via a cable (101) of a cable system and second circuits (2) for in response to detection results from the first circuits (1) changing a characteristic frequency of the cable system. The first circuits (1) may comprise detectors for detecting currents, voltages and impedances and the second circuits (2) may comprise signaling capacitors (21) and switches (22). Devices (30) for searching for problems in the cable system comprise third circuits (3) for measuring values of the characteristic frequency and fourth circuits (4) for comparing the measured values of the characteristic frequency with reference values. The devices (30) may comprise fifth circuits (5) for deriving from the measured values and from information about the apparatus (10) values of inductances of the cable system and sixth circuits (6) for converting the derived values into locations of the problems or into distances defining locations of the problems.
摘要:
The aim of the invention is to achieve simple and reliable data communication in an arrangement consisting of a plurality of serially-connected inverters (31, 32, … 3n) and a network monitoring unit (5) which superimposes a synchronization pulse (10) to the network voltage (VN) applied to the electrical load (4) said pulse being detectable by the inverter (31, 32, … 3n) for temporal synchronization.
摘要:
A communication system for a power line is described. A transmission system of the communication system divides the time axis into a number of time slots synchronized such that one time slot can start about a zero crossing of the power line signal. These time slots are referred to as channels and are numbered from 1 to n. A modulation method is described to is narrow band continuous phase FSK, where a number m of modulating frequencies are used, arranged such that an integral number of full cycles fit into each channel time slot for all m frequencies. The system transmits during only a subset of the available time slots (channels) concentrated near the zero crossing of the power line waveform where the noise is typically minimal.
摘要:
The present invention pertains to the field of power generation and electrical transmission lines and may be used for determining the electricity produced, transmitted and used. This invention provides a more reliable definition of the electricity source, of the electricity user and of the section in the electric circuit or electrical transmission line through which electricity is supplied from the source to the user. To this end, the method involves introducing into the electricity, during and/or after generating an electromotive force, an identifier related to the source or the user, or to at least one of the electrical transmission lines or to at least one of the electricity distributors. The identifier may be introduced into the main frequency harmonic, in one of the highest or lowest voltage or current harmonics. The identifier consists of unipolar and/or bipolar pulses and various combinations thereof, as well as of a time mismatch between the voltage and the current.