CN104104092A - Single-phase intelligent compensating power saving controller and control method thereof - Google Patents

Abstract

The invention belongs to the field of electric and electronic power saving control, and particularly relates to a single-phase intelligent compensating power saving controller and a control method thereof. The controller comprises a central processing unit, a power saving control circuit, a first power supply, a second power supply, a display circuit and a power metering detection circuit which are electrically connected with the central processing unit, a balanced switching circuit and a current limiting protection circuit which are electrically connected with the power metering detection circuit, a voltage transformer electrically connected with the current limiting protection circuit, and a current transformer electrically connected with the balanced switching circuit, wherein the central processing unit is electrically connected with the power saving control circuit. According to the controller and the control method, power consumption of a user can be traced in real time, power consumption efficiency on a line can be detected and judged, and a hidden danger that a fixed power saver becomes a capacitive load is eliminated, so that the power consumption line is in a high-efficiency power consumption state all the time, and a power saving effect is achieved better.

Description

A single-phase intelligent compensation power-saving controller and its control method

technical field

The invention relates to the field of power electronic power-saving control, in particular to a single-phase intelligent compensation power-saving controller and a control method thereof.

Background technique

At present, most of the single-phase power savers on the market are plug-and-play, fixedly connected to the line, the power saving effect is not very obvious, because the user's home has installed a lot of electrical appliances, and the user's power consumption quality is constantly changing. Therefore, without a power saver that can track the quality of electricity used by household users in real time, the power saving effect of the power saver is not obvious. Because, when the home appliance stops working, the power saver is still connected to the line. At this time, the power saver is also a potential power-consuming electrical device. Therefore, the power saver connected to the circuit will become a hidden danger of wasting electrical appliances. With the continuous development of my country's economy and the continuous improvement of people's living standards, every household has added a lot of household appliances, and the irrational use of energy is also increasing. Therefore, the development of household appliances that can be adjusted in real time to the circuit can really meet the urgent needs of energy saving and emission reduction.

It is extremely unreasonable to connect the single-phase power saver fixedly on the line. When there is no load on the line, the fixed power saver will become a capacitive load. Electrical appliances will also become a capacitive load. Only when the efficiency of power consumption on the line is low, the fixed power saver will improve the efficiency and achieve the purpose of saving power. However, the quality of power consumption in the home is constantly changing. A single fixed power saver cannot always play a role in saving electricity.

Contents of the invention

The purpose of the present invention is to solve the above-mentioned problems. It provides a single-phase intelligent power saving control device and its control method, which can track the user's power consumption in real time, how to detect and judge the power consumption efficiency on the line, and eliminate the need for fixed power saving devices to become capacitors. The hidden danger of permanent load makes the power line in a high-efficiency power consumption state at all times, so as to achieve the effect of saving electricity and better achieve the effect of saving electricity.

To achieve the above object, the present invention provides the following technical solutions:

A single-phase intelligent compensation power-saving controller, characterized in that it includes: a central processing unit, a power-saving control circuit, a first power supply, and a second power supply, the central processing unit is electrically connected to the power-saving controller, and also includes a The display circuit electrically connected to the central processing unit, the electric energy measurement detection circuit, the balance conversion circuit electrically connected to the electric energy measurement detection circuit, the current limiting protection circuit, the voltage transformer electrically connected to the current limiting protection circuit, and the balance conversion circuit electrically connected Current Transformer;

The first power supply is connected to the power-saving control circuit, and the second power supply circuit is connected to the central processing unit and the electric energy metering detection circuit;

The power-saving control circuit, the voltage transformer and the current transformer are also electrically connected with the mains circuit.

What needs to be understood is that most of the single-phase power savers on the market can exert their power saving effect. They only compensate for the power saving of the electrical appliances in the line when there are household appliances turned on. They do not have the ability to monitor the power quality of users in the line in real time. In this solution, the power quality of users in the line can be monitored in real time, and the power compensation of electrical appliances in the line can be performed at any time. When the quality of power consumption of users in the line is good, the power-saving compensation control circuit in the line can be automatically cut off.

Preferably, the power-saving control circuit includes a triode Q1, a relay K1, a light-emitting diode D1, a diode D2, a resistor R40, a resistor R41, a resistor R42, a capacitor C40, and a capacitor C41. The base of the triode Q1 is connected to the center through the resistor R40. The processors are connected in series, the collector is connected to the ground, the emitter is connected to the second leg of the relay K1 and the anode of the diode D2, the cathode of the diode D2 is connected to the first power supply and the first leg of the relay K1, and the relay K1 The third pin of the relay K1 is connected in series with one end of the inductor L1, the fourth pin of the relay K1 is connected with the N terminal of the mains line, and one end of the capacitor C40 and the capacitor C41 are connected in series with the other end of the inductor L1 and one end of the resistor R41, The other end is connected to the L terminal of the mains line, the other end of the resistor R41 is connected in series with the cathode of the light-emitting diode D1 and one end of the resistor R42, and the anode of the light-emitting diode D1 is connected to the L terminal of the mains line. The other end of the resistor R42 is connected to the L terminal of the mains line. This can be used as a power-saving compensation circuit while simultaneously filtering out high-frequency ripples generated in the line, and eliminating the influence of ripples on power factor compensation.

Further, the power-saving control circuit includes at least one or multiple control circuits connected in parallel.

Further preferably, the power-saving control circuit is a four-way parallel control circuit.

Choose a single power-saving control circuit to keep the circuit in a better power consumption state, and introduce multiple intelligent control power-saving control circuits to keep the power quality in the line in the best power state.

Further, the central processing unit is connected to the SPI serial bus of the electric energy metering detection circuit, and the model of the electric energy metering detection circuit is RN8209.

Specifically, the fourth and fifth pins of the electric energy measurement detection circuit RN8209 are electrically connected to the balance conversion circuit, and the eighth pin of the RN8209 is electrically connected to the current limiting protection circuit.

Preferably, the voltage of the eighth pin of the electric energy metering detection circuit RN8209 is 12V, and the voltage difference between the fourth pin and the fifth pin is 6V.

In single-phase power-saving control, the electric energy metering detection circuit is a data collector, which not only needs to ensure stable, accurate and reliable performance, but also needs a metering circuit with a simple structure, complete data processing functions, and a low price; RN8209 is The electric energy measurement and detection circuit with relatively complete functions can process data quickly, and the connection with the central processing unit is relatively simple, easy to use, and high in accuracy.

The present invention also provides the control method of the above-mentioned single-phase intelligent compensation power-saving controller, which is characterized in that, after the power-saving controller of the present invention is powered on, the central processing unit initializes the entire power-saving controller, and the control method is as follows Steps to proceed:

Step A: Initialize the system parameters; clear the registers of the central processing unit, and set the interrupt working mode of the central processing unit. power;

Step B: Display the initialized parameters, and the display circuit displays the active power, effective current and effective voltage in the RN8209 computing circuit read by the central processor;

Step C: Start the grid quality measurement. The step C is to make a judgment based on the data results of the grid power quality measured and displayed in step B. If the power factor of the measured grid is excellent, return to step A. If the power factor in the measured grid is If not, go to step D;

Step D: Interrupt module processing; the central processing unit reads the measurement data in step C and enters the interrupt module for processing. If the power factor in the grid is negative, the relay in the power-saving control circuit is cut off and exits the compensation capacitor. If the power factor in the grid is If it is less than 0.93, start the relay of the power-saving control circuit, and put in the compensation capacitor, and the power-saving controller will compensate power to the grid.

Preferably, the step C measures that the power factor in the grid is greater than or equal to 0.94 as excellent, and less than or equal to 0.93 as poor.

Preferably, in the step D, the power factor of the power saving controller performing power compensation to the mains line is between 0.94 and 0.99.

Compared with the prior art, the present invention has the following beneficial effects:

The measurement method of the present invention and the prior art is not only efficient and accurate, but also has high reliability and high precision. It can monitor and track the power quality in the mains line in real time, realize the purpose of intelligent power-saving compensation control, and perform automatic power compensation, which can eliminate The high-frequency ripple in the line eliminates the hidden danger of the fixed power saver becoming a capacitive load, makes the power quality in the line in the best state, achieves the effect of energy-saving compensation, and is low in cost and widely used.

Description of drawings

In order to illustrate the technical solutions in the examples of the present invention or the prior art more clearly, the accompanying drawings required in the description of the implementation examples or the prior art will be briefly introduced below. Obviously, the accompanying drawings in the following description are only the present invention. For some examples, those skilled in the art can also obtain other drawings based on these drawings without paying any inventive step.

Fig. 1 is a schematic structural diagram of a single-phase intelligent compensation power-saving controller of the present invention.

Fig. 2 is a schematic diagram of an electric energy metering detection circuit according to a specific embodiment of the present invention.

FIG. 3 is a schematic diagram of a power saving control circuit according to a specific embodiment of the present invention.

Fig. 4 is a structural diagram of a control method of a single-phase intelligent compensation power-saving controller according to the present invention.

Fig. 5 is a schematic diagram of the flow of an interrupt processing method in a specific embodiment of the control method of the present invention.

FIG. 6 is a schematic diagram of a power saving control circuit according to another embodiment of the present invention.

In the accompanying drawings, 1-first power supply, 2-display circuit, 3-second power supply, 4-central processing unit, 5-energy-saving controller, 6-electric energy measurement detection circuit, 7-balance conversion circuit, 8-current Transformer, 9-current limiting protection circuit, 10-current transformer,

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the examples of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Referring to Fig. 1, a schematic structural diagram of a single-phase intelligent compensation power-saving controller of the present invention is provided, including a central processing unit 4, a power-saving control circuit 5, a first power supply 1, and a second power supply 3, and the central processing unit 4 is electrically connected to the energy-saving controller 5, and also includes a display circuit 2 electrically connected to the central processing unit 4, an electric energy measurement detection circuit 6, a balance conversion circuit 7 electrically connected to the electric energy measurement detection circuit 6, and a current limiting protection circuit 9, A voltage transformer 10 electrically connected to the current limiting protection circuit 9 and a current transformer 8 electrically connected to the balance conversion circuit 7 .

Among them, the central processing unit 4 adopts AT89S52 single-chip microcomputer, the electric energy measurement detection circuit 6 adopts the RN8209 chip, the first power supply 1 outputs +12V (VCC) power supply voltage, and provides power to the power saving control circuit 5, and the second power supply circuit 3 supplies power to the central processing Device 5 and electric energy metering detection circuit 6 provide +5V power supply voltage.

Referring to Fig. 2, as a specific embodiment of the present invention, the voltage transformer 10 and the current transformer 8 are electrically connected with the 220VAC mains circuit, and the L terminals (neutral line) of the current transformer 8 and the 220VAC mains circuit are connected in series In the line, the current in the line is sampled, and the voltage transformer 10 is connected to the N terminal (live wire) to sample the voltage in the line. In the embodiment of the present invention, the current sampled by the current transformer 8 passes through the balance circuit 7 The final signals are respectively input between the fourth pin and the fifth pin of RN8209, and the signal output by the voltage sampled by voltage transformer 10 after passing through the current limiting protection circuit 9 is input to the eighth pin of RN8209, wherein the first pin of RN8209 The eight-pin input voltage is 12V, and the voltage difference between the fourth and fifth pins is 6V. Wherein, the thirteenth pin (SDO), the fourteenth pin (SDI), the fifteenth pin (SCLK), and the sixteenth pin (SCSN) of the serial data port of the central processing unit 4 and the electric energy measurement detection circuit RN8209 are respectively connect.

1 and 3, as a preferred embodiment of the present invention, the power-saving control circuit 5 includes a triode Q1, a relay K1, a light emitting diode D1, a diode D2, a resistor R40, a resistor R41 and a resistor R42, and a capacitor C40 and a capacitor C41, the base of the triode Q1 is connected in series with the P0.0 pin of the central processing unit 4 through the resistor R40, the collector is connected to the ground, and the emitter is connected to the second pin of the relay K1 and the anode of the diode D2, the said The cathode of the diode D2 is connected to the first power supply and the first pin of the relay K1, the third pin of the relay K1 is connected in series with one end of the inductance L1, the fourth pin of the relay K1 is connected to the N terminal (live wire) of the 220VAC mains circuit connection, the capacitor C40 and the capacitor C41 are connected in parallel, one end is connected in series with the other end of the inductor L1 and one end of the resistor R41, and the other end is connected to the L terminal of the 220VAC mains line, and the other end of the resistor R41 is connected to the cathode of the light-emitting diode D1 1. One end of the resistor R42 is connected in series, the anode of the light-emitting diode D1 is connected to the L terminal (zero line) of the 220VAC mains circuit, and the other end of the resistor R42 is connected to the L terminal (zero line) of the 220VAC mains circuit.

When the power saving control circuit 5 performs power compensation to the mains line, the P0.0 pin of the central processing unit outputs a high level through the resistor R40 to the base of the triode Q1. At this time, after the triode Q1 is turned on, the relay K1 At the same time, the compensation circuit composed of inductor L1, capacitor C40, capacitor C41, voltage divider resistor R40, and resistor R41 performs power compensation on the mains line, and the light-emitting diode D1 indicates the working state of the power compensation in the line. The diode D2 is set for the protection of the relay K1 to prevent the large current generated when the relay K1 starts suddenly from being damaged.

Referring to Fig. 1, the present invention also provides a control method of a single-phase intelligent compensation power-saving controller. Provide power supply, the second power supply circuit 3 provides +5V power supply voltage to the central processing unit and the electric energy measurement detection circuit 6, and the central processing unit 4 is electrically connected with the power saving controller 5, the display circuit 2, and the electric energy measurement detection circuit 6, wherein The electric energy metering detection circuit 6 is also electrically connected with the balance conversion circuit 7 and the current limiting protection circuit 9, the current limiting protection circuit 9 is electrically connected with the voltage transformer 10, and the balance conversion circuit 7 is electrically connected with the current transformer 8. The power-saving control circuit, the voltage transformer and the current transformer are also electrically connected to the 220VAC mains circuit. Among them, the central processing unit 4 adopts the AT89S52 single-chip microcomputer, and the electric energy measurement and detection circuit 6 adopts the RN8209 chip.

Referring to Fig. 2, as a specific embodiment of the present invention, the voltage transformer 10, the current transformer 8 are electrically connected with the 220VAC mains line, and the L terminals (neutral line) of the current transformer 8 and the 220VAC mains line are connected in series. In the line, the current in the line is sampled, and the voltage transformer 10 is connected to the N terminal (live wire) to sample the voltage in the line. In this embodiment of the invention, the current sampled by the current transformer 8 passes through the balance circuit 7 The signals are input to the fourth pin and the fifth pin of RN8209 respectively, and the signal output by the voltage sampled by the voltage transformer 10 after passing through the current limiting protection circuit 9 is input to the eighth pin of RN8209. Among them, the eighth pin input voltage of RN8209 is 12V, and the voltage difference between the fourth pin and the fifth pin is 6V. Wherein, the thirteenth pin (SDO), the fourteenth pin (SDI), the fifteenth pin (SCLK), and the sixteenth pin of the serial data bus (SPI) port of the central processing unit 4 and the electric energy measurement detection circuit RN8209 (SCSN) connected separately. Wherein, the sixteenth pin (SCSN) is a chip select signal pin, when making the chip select signal SCSN pin change from high level to low level with central processing unit 4 output, now central processing unit 4 and RN82099 The serial data bus (SPI) writes or reads data. At this time, the central processing unit 4 sends clock control signals to the RN82099 through the thirteenth pin (SDO), the fourteenth pin (SDI), and the sixteenth pin (SCSN). The serial data bus (SPI) to write or read data.

Referring to Fig. 1 and Fig. 3, in the preferred embodiment of the present invention, the power-saving control circuit 5 includes a triode Q1, a relay K1, a light-emitting diode D1, a diode D2, a resistor R40, a resistor R41 and a resistor R42, and a capacitor C40 and a capacitor C41 , the base of the triode Q1 is connected in series with the P0.0 pin of the central processing unit 4 through a resistor R40, the collector is connected to the ground, the emitter is connected to the second pin of the relay K1, and the anode of the diode D2, and the diode The cathode of D2 is connected to the first power supply and the first pin of the relay K1, the third pin of the relay K1 is connected in series with one end of the inductor L1, and the fourth pin of the relay K1 is connected to the N terminal (live wire) of the 220VAC mains circuit , one end of the capacitor C40 and the capacitor C41 are connected in parallel with the other end of the inductor L1 and one end of the resistor R41 in series, the other end is connected with the L terminal (zero line) of the 220VAC mains line, and the other end of the resistor R41 is connected with the light-emitting diode D1 The cathode of the LED and one end of the resistor R42 are connected in series, the anode of the LED D1 is connected to the L terminal (neutral line) of the 220VAC mains circuit, and the other end of the resistor R42 is connected to the L terminal (the neutral line) of the 220VAC commercial circuit.

Specifically, referring to Fig. 4 and Fig. 5, after the power-saving controller of the present invention is powered on, the central processing unit initializes the entire power-saving controller, and the control method is carried out as follows:

Step A: system parameters are initialized; the register of central processing unit 4 is cleared, and the interrupt mode of operation of central processing unit 4 is set, the fourteenth pin (SDI) of the serial data port of RN8209 by central processing unit 4 ) into the system initial value of RN8209, start data serial communication register, interrupt register, metering register and active power metering register, then, RN8209 calculates the current sampled by current transformer 8 and the current sampled by voltage transformer 10 respectively.

Step B: display the initialized parameters, the display circuit display central processing unit 4 reads the active power, effective current and effective voltage in the calculation line after the RN8209 initialization in step A, and displays them in the display circuit 2, wherein, the display The circuit uses a liquid crystal display, and the displayed parameters also include parameters for active power calibration and reactive power calibration.

Step C: Start the grid quality measurement. The step C is to judge the power quality of the users in the grid line according to the measurement and display results of the step B. If the power factor of the monitoring and measurement grid is excellent, return to step A. If the monitoring and measurement of the power factor of the grid is If the power factor is poor, go to step D. In this embodiment, the power factor greater than or equal to 0.94 is excellent, and less than or equal to 0.93 is poor.

Step D: Interrupt module processing; see Figure 4 and Figure 5, after the central processing unit 4 reads the measurement data in step C, it enters the interrupt module processing, if the power factor in the grid line is negative, that is, when the grid line is overcompensated , the relay K1 in the power-saving control circuit 5 is cut off and withdraws from the compensation capacitor, and the interrupt processing ends. If the power factor in the power grid is 0 to 0.93, that is, when the power grid line is under-compensated, the relay of the power-saving control circuit is started and connected. input the compensation capacitor, the energy-saving controller 5 performs power compensation to the grid, and ends the interrupt processing.

As the best embodiment of the present invention, the power factor measurement range is between -1 and 1, and when the measurement result is between -1 and 0, the line network is in an overcompensated state; the power factor is between 0 and 0.93 time, that is, the power grid is under-compensated. In the step D, the power factor of the energy-saving controller performing power compensation to the mains line is in the range of 0.94-0.99, so that the power quality of the grid line can always be kept in an optimal state. When the line is in an over-compensated state, the measured measurement result is less than 0.0, and the measurement display result judged by the central processing unit 4 is a negative number.

Referring to Figs. 1 to 5, the working principle of the present invention will be further elaborated. The current transformer 8 samples the current in the mains line, and the voltage transformer 8 samples the voltage in the mains line, and then inputs the electric energy metering detection circuit 6 to the mains line. Active power, active power verification, reactive power verification and other parameters in the line are measured and detected, and the central processing unit 4 reads the results of the calculation data, and judges whether the power quality on the line is excellent or poor, then After the P0.0 pin of the central processing unit 4 is connected in series with R40, the corresponding level is output to the base of the transistor Q1, and the transistor Q1 is turned on or off, so that the switch of the relay K1 is opened or closed. At this time, the capacitor C40, The compensation circuit composed of the capacitor C41, the inductor L1, the resistor R41 and the resistor R42 is connected to the mains line to perform power compensation to the power line. When the power consumption efficiency of the electrical appliances in the line is high, that is, when it is optimal, the P0.0 pin of the central processing unit 4 outputs a low-level signal to turn off the switch of the relay K1, the compensation capacitor is cut off, and no power compensation is performed on the line , at this time, the capacitor C40 and the capacitor C41 in the compensation circuit are charged. When the power consumption efficiency of electrical appliances in the mains line is low, that is, poor, the P0.0 pin of the central processing unit 2 outputs a high-level signal to close the switch of the relay K1, and connect the compensation circuit to the mains line , the discharge circuit composed of compensation capacitor C40, capacitor C41, inductor L1, discharge resistor R41 and resistor R42 performs power compensation on the power line. At this time, the light emitting diode D1 connected in parallel with the resistor R42 will light up, indicating that power compensation is being performed on the line. At the same time, the inductance L1, the capacitor C40, the capacitor C41, the resistor R41 and the resistor R42 in the circuit can also filter out the high-frequency ripple in the circuit in the circuit.

Referring to Fig. 1, Fig. 2, and Fig. 6, as another embodiment of the present invention, a single-way power-saving control circuit 5 is connected in parallel to form a four-way power-saving compensation control circuit, and the electric energy metering detection circuit 6 is based on the current mutual inductance After the current in the line is sampled by the voltage transformer 8 and the voltage in the line is sampled by the voltage transformer 8, the central processing unit 4 reads the result of the calculation data and judges the power consumption efficiency of the electrical appliances in the line, and the central processing unit 4 selects to close the first road , No. Ⅱ Road, No. Ⅲ Road or No. Ⅳ Road power-saving compensation circuit for power compensation to the line. Or close the Ⅰ～Ⅳ roads at the same time, or choose to close any several roads in the Ⅰ～Ⅳ roads.

Wherein, the first road includes triode Q1, relay K1, light-emitting diode D1, diode D2, resistor R40, resistor R41, resistor R42, capacitor C40 and capacitor C41, and the base of the transistor Q1 connects with the central processing unit through resistor R40. The P0.0 pins are connected in series, the collector is connected to the ground, the emitter is connected to the second leg of the relay K1, and the anode of the diode D2, and the cathode of the diode D2 is connected to the first power supply and the first leg of the relay K1, so The third pin of the relay K1 is connected in series with one end of the inductor L1, the fourth pin of the relay K1 is connected to the N terminal of the mains line, the capacitor C40 and the capacitor C41 are connected in parallel, and one end is connected to the other end of the inductor L1 and one end of the resistor R41 connected in series, the other end is connected to the L terminal (zero line) of the mains line, the other end of the resistor R41 is connected in series with the cathode of the light-emitting diode D1 and one end of the resistor R42, and the anode of the light-emitting diode D1 is connected to the line of the mains L terminal (neutral line), the other end of the resistor R42 is connected to the L terminal of the mains line.

When the power saving control circuit 5 performs power compensation to the mains line, the P0.0 pin of the central processing unit outputs a high level through the resistor R40 to the base of the triode Q1. At this time, after the triode Q1 is turned on, the relay K1 At the same time, the compensation circuit composed of inductor L1, capacitor C40, capacitor C41, voltage divider resistor R40, and resistor R41 performs power compensation on the mains line, and the light-emitting diode D1 indicates the working state of the power compensation in the line. The diode D2 is set for the protection of the relay K1 to prevent the large current generated when the relay K1 starts suddenly from being damaged.

The second circuit includes a compensation circuit composed of transistor Q2, relay K2, light-emitting diode D3, diode D4, resistor R43, resistor R44, resistor R45, capacitor C42, capacitor C43 and inductor L2.

Road III includes a compensation circuit composed of transistor Q3, relay K3, light-emitting diode D5, diode D6, resistor R46, resistor R47, resistor R48, capacitor C44, capacitor C45, and inductor L3.

The fourth circuit includes a compensation circuit composed of triode Q4, relay K4, light-emitting diode D7, diode D8, resistor R49, resistor R50, resistor R51, capacitor C46, capacitor C47 and inductor L4.

Among them, the connection relationship of each circuit component in the second road to the fourth road is the same as that of the first road, and the functions of each circuit component are also the same. The difference is that the base of the transistor Q2 is connected to the central processing unit through the resistor R43. The P0.1 pins are connected in series, the base of the triode Q3 is connected in series with the P0.2 pin of the CPU through the resistor R46, and the base of the transistor Q4 is connected in series with the P0.3 pin of the CPU through the resistor R49.

In this embodiment, the four pins of the relays K1-K4 are all connected to the N terminals (live wires) on the 220VAC mains line at the same time, and the bases of the triodes Q1-Q4 are respectively connected to each other through the resistors R40, R43, R46, and R49. The P0.0～P0.3 pins of the central processing unit are respectively connected in series, and control the opening or closing of the relays K1～K4, select and close several compensation circuits according to the power quality detected by the line, and supply power to the mains line. Compensation, when one compensation circuit is selected to work closed, the power factor in the line can be compensated to more than 0.94, when multiple compensation circuits are selected to be closed, the power factor in the line can be close to 0.99, which more effectively improves the power factor in the mains line Power factor, improve the effect of compensation, to achieve the purpose of saving electricity.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the invention within.

Claims (10)

1. A single-phase intelligent compensation power-saving controller, characterized in that: comprise central processing unit, power-saving control circuit, first power supply, second power supply, said central processing unit is electrically connected with power-saving controller, also includes The display circuit electrically connected with the central processing unit, the electric energy measurement detection circuit, the balance conversion circuit electrically connected with the electric energy measurement detection circuit, the current limiting protection circuit, the voltage transformer electrically connected with the current limiting protection circuit, and the balance conversion circuit electrically connected current transformer; The first power supply is connected to the power-saving control circuit, and the second power supply circuit is connected to the central processing unit and the electric energy metering detection circuit; The power-saving control circuit, the voltage transformer and the current transformer are also electrically connected with the mains circuit. 2. A single-phase intelligent compensation power-saving controller as claimed in claim 1, characterized in that: the power-saving control circuit comprises a triode Q1, a relay K1, a light-emitting diode D1, a diode D2, a resistor R40, a resistor R41, Resistor R42, capacitor C40 and capacitor C41, the base of the transistor Q1 is connected in series with the central processing unit through the resistor R40, the collector is connected to the ground, and the emitter is connected to the second pin of the relay K1 and the anode of the diode D2. The cathode of the diode D2 is connected to the first power supply and the first pin of the relay K1, the third pin of the relay K1 is connected in series with one end of the inductor L1, the fourth pin of the relay K1 is connected to the N terminal of the mains circuit, and the After the capacitor C40 and the capacitor C41 are connected in parallel, one end is connected in series with the other end of the inductance L1 and one end of the resistor R41, and the other end is connected to the L terminal of the mains line, and the other end of the resistor R41 is connected to the cathode resistor R42 of the light-emitting diode D1. One end is connected in series, the anode of the light-emitting diode D1 is connected to the L terminal of the commercial power line, and the other end of the resistor R42 is connected to the L terminal of the commercial power line. 3. A single-phase intelligent compensation power-saving controller according to claim 2, wherein the power-saving control circuit comprises at least one or multiple parallel control circuits. 4. The single-phase intelligent compensation power-saving controller according to claim 3, wherein the power-saving control circuit is a four-way parallel control circuit. 5. the control method of a kind of single-phase intelligent compensation energy-saving controller as claimed in claim 1, is characterized in that, described central processing unit is connected with the SPI serial bus of electric energy measurement detection circuit, and described electric energy measurement detection circuit The model number is RN8209. 6. A single-phase intelligent compensation energy-saving controller as claimed in claim 5, characterized in that the fourth pin and the fifth pin of the electric energy measurement detection circuit RN8209 are electrically connected to the balance conversion circuit , the eighth pin of the RN8209 is electrically connected to the current limiting protection circuit. 7. A single-phase intelligent compensation energy-saving controller as claimed in claim 6, wherein the voltage of the eighth pin of the electric energy measurement detection circuit RN8209 is 12V, and the voltage between the fourth pin and the fifth pin is 12V. The difference is 6V. 8. the control method of a kind of single-phase intelligent compensation energy-saving controller as claimed in claim 1, is characterized in that, after power-on, central processing unit initializes whole energy-saving controller, and its control method is carried out as follows: Step A: Initialize the system parameters; clear the registers of the central processing unit, and set the interrupt working mode of the central processing unit. power; Step B: Display the initialized parameters, and the display circuit displays the active power, effective current and effective voltage in the RN8209 computing circuit read by the central processor; Step C: Start the grid quality measurement. The step C is to make a judgment based on the data results of the grid power quality measured and displayed in the step B. If the measured power factor of the grid is excellent, return to step A. If the power factor in the grid is measured If it is poor, go to step D; Step D: Interrupt module processing; the central processing unit reads the measurement data in step C and enters the interrupt module for processing. If the power factor in the grid is negative, the relay in the power-saving control circuit is cut off and exits the compensation capacitor. If the power factor in the grid is If it is less than 0.93, start the relay of the power-saving control circuit, and put in the compensation capacitor, and the power-saving controller will compensate power to the grid. 9. The control method of a single-phase intelligent compensation power-saving controller as claimed in claim 8, wherein the step C measures that the power factor in the power grid is greater than or equal to 0.94, which is excellent, and less than or equal to 0.93, which is poor. 10. The control method of a single-phase intelligent compensation power-saving controller as claimed in claim 8, characterized in that, the power factor range of the power-saving controller performing power compensation to the mains line in the step D is 0.94～ between 0.99.