TH718A3 - Three-phase power factor regulator - Google Patents

Abstract

A three-phase power factor control device detects the electrical energy in Power system By detecting current signal and voltage signal Came into the calculation of the body Control device To find electric energy and dissipation power (KVAR), then it will send the output signal (maximum 15 output) to control. Disadvantaged Energy Value (KVAR) to correct system losses and to keep KEVAR values constant and to a minimum. In addition to its good KVAR control, it is also possible to control the peak power consumption (Peak Demand Control) and to control the specified voltage level. By sending an on / off signal to control the control circuit of the control circuit to control the electrical equipment under control. As a control device as mentioned above, it can also display the various electrical energy needed to be used. Manage and control the use of electrical energy efficiently, such as the transmission of component information of Power in a three-phase power system to a computer system for reporting, etc.

Claims (5)

1. Three-phase power factor control equipment consists of input receiver unit, amplifying circuit set, processing unit and control circuit set. Where the input set is a device that Function as a receiver of the electrical signal from the power supply. Which consists of a set of 3 current transformers that receive current signals from all three phase power systems The current signal is then sent in each phase to the amplifier circuit. And the voltage transformer set receives the voltage signal per phase of the three-phase power system, then sends the voltage signal of each phase to the amplification circuit. The two signs are Voltage and current signals that have passed through the amplifier series. It is sent to the next processing unit, where the processor (CPU) receives the current and voltage signals of each phase from the amplifiers. To carry the acquired signal Convert the signal at a series of transducer circuits. Analog to digital (ANALOG TO DIGITAL) in which the circuit is located within the processor unit (CPU) to convert the current signal of the voltage of each phase that is analog signal to Digital signal And put them to memory Of the processing unit Then the processing unit is done. Data calculation of each phase signal, voltage and current stored in memory. Remember to take the form of electrical energy in kilowatts (KW), the kwh of each phase, and then the kilowatt (KW) and kvar values of each. The phases come together as the kilowatt power (KW) and the dissipation power (KVAR) of the 3 phase power system. The total power of the 3 phase power system can be displayed on the display unit. With the keyboard as the input, which is set as the power data value The electrical work of a 3-phase power system with the specified value is stored in the processor's memory. For comparative information with the measured energy values of the system 2.The three-phase power factor control device according to claim 1 calculated the power factor (KW) generated by the 3-phase power system will be compared with the set electric power (KW) data. Stored in memory by keyboard If the electric power (KW) of the 3-phase power system is higher than the rated energy, The processor will send a signal to the control circuit set. Controlled to cut off the specified electrical equipment such as air conditioners, electric ovens, one circuit at a time until the full amount within 1-15 controlled circuits. But if the electric power (KW) from the 3-phase power system is lower than the specified value The processor signals the control unit to open the device. Defined electricity such as air conditioners, electric ovens, one circuit at a time until the full amount within 1-15 control circuits as specified. 3. Three-phase power factor control device according to claim 1 that calculates the power factor. The dissipation power (KVAR) work caused by the 3-phase power system is compared with the Dissipation Power (KVAR) value set in the keyboard processing unit. If the Kvar of a 3-phase power system is greater than the Dissipation Power set for each control circuit within 1-15 The processor then sends a control signal to the capacitor bank and connects it to the power system, one control circuit at a time, as defined in the processor so that the energy loss value (KVAR) of the The 3-phase power system is the smallest. On the other hand, if the KvAR in a 3-phase power system is lower than the power, the 3-phase power system is minimal. For defined power loss (KVAR) job, the processor will stop the coupling of the capacitor circuit. Into a 3-phase power system.When the KVAR of the 3-phase power system is negative, the processor sends a control signal to disconnect the capacitor with the value loss (KVAR). ) Is minimal until the KVAR of the 3-phase power system is within the specified limits. 4.Three-phase power factor control device according to claim 1 that calculates labor cost. The voltages of each phase resulting from a 3-phase power system are compared with the rated voltage. The sky defined in the series is as follows, if the voltage on each phase or a particular phase Within a 3-phase power system, only one of the phases is higher or lower than the voltage of each phase specified in the keyboard processor. The processor sends a complete control signal to the control signal. The control stopped working immediately. 5.Three-phase power factor control equipment according to claim 1 that calculates the power composition data of the aforementioned 3-phase power system. When the time is followed Defined in the processor or a signal from a computer system. The processing unit sends the data The component value of the 3-phase electric power through a series of circuits to transmit data to the computer. To be used for printing reports and as information for further management and administration