Power grid system and method of determining power consumption at one or more building connections in a power grid system. The power grid system comprises a power grid comprising a mains grid portion; a plurality of building connections, each building connection comprising a first meter configured for metering power imported from the mains grid portion to the associated building and power exported from the associated building into the mains grid portion; for one or more of the building connections, at least one second meter disposed downstream from the first meter relative to the mains grid portion and configured for metering power exported to the associated building from an auxiliary generator; and a consolidation unit configured for determining power consumption at said one or more of the building connections based on readings from the associated first and second meters.

In some embodiments, an electric energy information provision method includes measuring electric energy, analyzing the measured electric energy to generate electric energy information, and displaying the generated electric energy information in response to a request of a user. The electric energy information may include a variation status, a standard deviation analysis result, a dispersion deviation analysis result, trend line information, past accumulative electric energy variation information, anticipated future accumulative electric energy variation information, an electric energy usage status diagnosis, and electric energy reduction plan information.

In some embodiments, an electric energy information provision method includes measuring electric energy, analyzing the measured electric energy to generate electric energy information, and displaying the generated electric energy information in response to a request of a user. The electric energy information may include a variation status, a standard deviation analysis result, a dispersion deviation analysis result, trend line information, past accumulative electric energy variation information, anticipated future accumulative electric energy variation information, an electric energy usage status diagnosis, and electric energy reduction plan information.

There is described an electric meter center comprising electric meter sockets and breakers. The electric meter center comprises an electric meter area comprising compartments, each one of the electric meter sockets being in one of the electric meter area compartments. It further comprises a breaker area distinct from the electric meter area and comprising compartments, each one of the breakers being in one of the breaker area compartments. There is a physical separation between the breaker area and the electric meter area. There is provided a plurality of panels, each one of the panels for covering at least one compartment, the at least one compartment to be covered by one of the panels being only within the same area.

There is described an electric meter center comprising electric meter sockets and breakers. The electric meter center comprises an electric meter area comprising compartments, each one of the electric meter sockets being in one of the electric meter area compartments. It further comprises a breaker area distinct from the electric meter area and comprising compartments, each one of the breakers being in one of the breaker area compartments. There is a physical separation between the breaker area and the electric meter area. There is provided a plurality of panels, each one of the panels for covering at least one compartment, the at least one compartment to be covered by one of the panels being only within the same area.

The present disclosure provides a system and method for calculating electrical power. The method may include one or more operations of the following operations. Obtaining one or more current values. Setting a first voltage value. Generating one or more second voltage values based on the first voltage value. The one or more second voltage values may correspond to the one or more current values, respectively. Generating one or more first power values according to the one or more current values and the one or more second voltage values.

Methods and systems, include, in one aspect, a system including: receiving a total static power indicating a static power dissipation from a complete circuit, wherein the circuit comprises a plurality of components; receiving dynamic power weights indicating changes in the static power dissipation from the complete circuit over time; applying an algorithm including the dynamic power weights to partition the total static power, based on the changes in the static power, into a summation of individual per-component static power values, wherein the per-component static power values indicate a decomposition of the static power dissipation from the complete circuit into separate amounts of per-component static power dissipation corresponding to each of the plurality of components; and processing the per-component static power to evaluate a performance of the circuit, the plurality of components, or both.

A method of determining salinity of multi-phase fluids in a conduit includes exciting a sensing device to cause emission of electromagnetic waves of one or more frequencies into the multi-phase fluid. The method includes receiving transmitted or reflected electromagnetic waves from the multi-phase fluid. Furthermore, the method includes determining an intermediate parameter from the received electromagnetic waves. The method also includes obtaining estimated values of a plurality of parameters from the intermediate parameter. The estimated values comprise at least one of an estimated value of conductance, an estimated value of susceptance, an estimated value of differential conductance, an estimated value of differential susceptance, an estimated value of a real part of complex permittivity, and an estimated value of an imaginary part of complex permittivity. Salinity of the fluid is determined based, at least in part, on the estimated values of the plurality of parameters.

A first power consumption measuring unit 5 measures only the power consumption of a pump 21 that is a reference unit of a liquid chromatograph 2. A second power consumption measuring unit 6 measures only the power consumption of a gas chromatograph main body 31 that is a reference unit of a gas chromatograph 3. An operating information acquiring unit acquires pieces of operating information on an automatic sampler 22, an oven 23, and a detector 24 that are target units of the liquid chromatograph 2 based on information on the power consumption of the pump 21. The operating information acquiring unit acquires the operating information on a head space sampler 32 that is a target unit of the gas chromatograph 3 based on information on the power consumption of the gas chromatograph main body 31. Thus, even in the case where the analyzer includes many target units, only the power consumption of the reference units is measured, and the operating time period calculating unit can acquire the pieces of operating information on the target units from the power consumption of the reference units.

Circuit board comprising a printed circuit comprising phase conductors, each of which is arranged so as to be connected to one phase of a multiphase line, the circuit board further comprising a rectifier bridge comprising phase diodes that are mounted on one and the same face of the printed circuit, the phase diodes comprising, for each phase conductor, one pair of phase diodes comprising a first phase diode having an anode that is connected to said phase conductor and a second phase diode having a cathode that is connected to said phase conductor, the pairs of phase diodes lying in succession along a positioning axis on the face of the printed circuit, the first phase diode and the second phase diode of each pair of phase diodes being positioned in parallel but inverted with respect to each other.