CN104410164B - Ii type electric energy efficiency management terminal and system - Google Patents

Abstract

The present invention provides a kind of II type electric energy efficiency management terminal and system, the terminal includes terminal shell, the control unit in the terminal shell is arranged on, power module, memory cell, data acquisition module, communication module and the display module being connected with described control unit respectively；The data acquisition module includes direct current analog quantity acquisition unit, and the direct current analog quantity acquisition unit includes the DC analogue quantity sample circuit of two-way independence, and DC analogue quantity isolation circuit；The AC sampling unit includes three-phase alternating voltage measuring circuit and three-phase alternating current flow measurement circuitry.The II type electric energy efficiency management terminal has direct current analog quantity acquisition unit and AC sampling unit, non-electric quantity (such as flow, pressure, temperature, humidity) information (i.e. the DC analogue quantity data) that sensor detection is obtained can be acquired, and Current Voltage and power these electrical quantity are measured and data acquisition, so as to realize the detection and management to electric power environmental.

Description

Type II Power Energy Efficiency Management Terminal and System

technical field

The invention relates to the technical field of power monitoring, in particular to a Type II power energy efficiency management terminal and system.

Background technique

With the continuous development of national energy conservation and emission reduction and power demand side management, the construction of a smart grid-based power service management platform and power user energy efficiency monitoring system has become an important technical support for my country's energy conservation, emission reduction and power demand side management. . In order to standardize the construction of power service management platform and power user energy efficiency monitoring system, according to the principle of unified design and scientific and standardized construction, it is necessary to uniformly standardize the power energy efficiency monitoring terminal, so the standard design specification for power energy efficiency testing terminal has been formulated.

Most of the existing energy efficiency management systems still use the power management terminals in the old standards, such as the centralized meter reading terminal of the State Grid, the special change management terminal, etc. These terminals are general-purpose management in the power system The function of the terminal can only meet part of the functions of the energy efficiency management system under certain conditions, and in a certain area or in some special environments, the power terminal appears clumsy and has a single function. Only by using specific energy efficiency management terminals in different application environments can the application of the energy efficiency management system to the power environment be maximized.

Contents of the invention

Based on this, in order to solve the above-mentioned problem that the existing power management terminal has a single function and cannot be used in some special environments, the present invention provides a specific type II power energy efficiency management terminal and system, which can be used in different application environments and can The energy efficiency management system is applied to the power environment to the extreme.

Its technical scheme is as follows:

A Type II power energy efficiency management terminal, including a terminal housing, a control unit disposed in the terminal housing, a power supply module, a storage unit, a data acquisition module, a communication module, and a display module respectively connected to the control unit; The data acquisition module includes a DC analog acquisition unit, the DC analog acquisition unit includes two independent DC analog sampling circuits, and a DC analog isolation circuit; the front end of the DC analog sampling circuit includes a current signal connection TVS tube and zener tube, and a DC current sampling resistor connected behind the TVS tube and zener tube, a dual-channel sampling and measuring chip connected to the DC current sampling resistor; the AC sampling unit includes a three-phase AC A voltage measurement circuit and a three-phase AC current measurement circuit; the three-phase AC voltage measurement circuit includes a current-type voltage transformer, an AC voltage sampling resistor connected to the voltage transformer, and a three-phase AC voltage sampling resistor connected to the voltage transformer A phase-to-phase AC measurement chip; the three-phase AC current measurement circuit includes a current transformer, an AC current sampling resistor connected to the current transformer, and the AC current sampling resistor is connected to a three-phase AC measurement chip.

In the energy efficiency management system, it is necessary to detect and manage the power environment through an integrated device that is responsible for collecting, processing and analyzing information on electrical and non-electrical quantities (such as flow, pressure, temperature, humidity, etc.). It can not only collect and process on-site power environment information, but also must exchange data with power energy efficiency information centralized and interactive terminals. Under such requirements and application environments, Type II power energy efficiency management terminals emerged as the times require. The type II power energy efficiency management terminal has a DC analog quantity acquisition unit and an AC sampling unit, which can collect non-electrical quantity (such as flow, pressure, temperature, humidity, etc.) information (that is, DC analog quantity data) detected by the sensor, and Measure and collect data on electrical quantities such as current, voltage and power, thereby realizing the detection and management of the power environment.

The technical scheme is further described below:

Further, the power module includes a linear transformer with three outputs, and a communication power circuit, a data acquisition power circuit, and a control unit power circuit correspondingly connected to the linear transformer; moreover, the front end of the linear transformer is connected to a power supply protect the circuit. Among them, the three power circuits are respectively used to supply power to the communication module, the data acquisition module and the control unit, and the power protection circuit can ensure that the circuit is not damaged and can be recovered under overvoltage conditions.

Further, the communication module includes an infrared communication unit, an Ethernet communication unit, and an RS485 communication unit; wherein, the RS485 communication unit includes two RS485 communication interfaces, one of which is an RS485-1 communication interface for the meter reading port ; The other is the RS485-2 communication interface for the meter reading port and the routine inspection and maintenance port.

Further, it also includes a remote signaling displacement monitoring circuit connected to the control unit, and the remote signaling displacement monitoring circuit includes a remote signaling protection circuit, a remote signaling isolation circuit, and two active common-cathode connected remote signaling circuits. input interface.

Further, it also includes a remote control output circuit, the remote control output circuit includes a relay, and a remote control driving circuit arranged at the front end of the relay. The remote control output adopts the relay normally open and normally closed output mode. In addition to using the low-power Panasonic relay, in order to increase the stability and reliability of the control signal, a drive circuit is added to the front end of the relay.

Further, it also includes a real-time clock connected to the control unit, the real-time clock has a hard clock chip, and the hard clock chip integrates a temperature-compensated crystal oscillator inside.

Further, the display module includes an LCD display unit and an LED indicator unit arranged on the terminal housing; the LCD display unit includes a liquid crystal module, a liquid crystal driver chip integrated in the liquid crystal module, and the The liquid crystal display screen connected to the liquid crystal drive chip; the LED indication unit includes RS485 two-color transceiver light, power indicator light, running light, remote warning light, and active and reactive light for measuring energy efficiency monitoring terminal power.

Further, it also includes a button circuit connected to the control unit, the button circuit includes a button arranged on the terminal housing, and a 100nf anti-misjudgment capacitor connected to the button. The button circuit adopts the normal I/O input detection method, and the 100nf capacitor can prevent misjudgment caused by mode jitter.

The present invention also provides a Type II power energy efficiency management system, including a plurality of Type II power energy efficiency management terminals described above, a power energy efficiency information concentration and interaction terminal connected to the Type II power energy efficiency management terminals, and a terminal connected to the power energy efficiency A test host connected to the interactive terminal for information concentration; and also includes water and electricity measuring instruments, non-electric quantity sampling sensors, and electric quantity acquisition instruments connected to the type II power energy efficiency management terminal.

The present invention has the following outstanding beneficial effects:

(1) The type II power energy efficiency management terminal has special functions, innovative data processing capabilities, and professional external interfaces;

(2) Fully adapt to the design of the operating environment of the existing or future energy efficiency management system, regardless of performance or function, its application runs through the use of the entire energy efficiency management system;

(3) In addition, its cost is controllable, making its advantages more significant in existing energy efficiency management terminals.

Description of drawings

Fig. 1 is a schematic structural diagram of the main view of the type II power energy efficiency management terminal described in the embodiment of the present invention;

Fig. 2 is a schematic diagram of the looking-up structure of the type II power energy efficiency management terminal according to the embodiment of the present invention;

Fig. 3 is a left view structural schematic diagram of type II power energy efficiency management terminal according to the embodiment of the present invention;

Fig. 4 is a schematic diagram of the front-view structure of the Type II power energy efficiency management terminal according to the embodiment of the present invention;

Fig. 5 is a schematic diagram of the rear view structure of the type II power energy efficiency management terminal according to the embodiment of the present invention;

Fig. 6 is a schematic block diagram of the general principle of the Type II power energy efficiency management terminal according to the embodiment of the present invention;

Fig. 7 is a schematic structural diagram of the communication power supply circuit of the power module of the control unit of the Type II power energy efficiency management terminal according to the embodiment of the present invention;

Fig. 8 is a schematic structural diagram of the data acquisition power supply circuit of the power module of the control unit of the type II power energy efficiency management terminal according to the embodiment of the present invention;

Fig. 9 is a schematic structural diagram of the power circuit structure of the power supply module control unit of the control unit of the type II power energy efficiency management terminal according to the embodiment of the present invention;

Fig. 10 is a schematic diagram of a circuit structure of the RS485 communication unit in the communication module of the control unit of the type II power energy efficiency management terminal according to the embodiment of the present invention;

Fig. 11 is a schematic diagram of another circuit structure of the RS485 communication unit in the communication module of the control unit of the type II power energy efficiency management terminal according to the embodiment of the present invention;

Fig. 12 is a schematic structural diagram of the DC analog quantity sampling circuit of the data acquisition module of the control unit of the type II power energy efficiency management terminal according to the embodiment of the present invention;

Fig. 13 is a schematic structural diagram of the DC analog isolation circuit of the data acquisition module of the control unit of the type II power energy efficiency management terminal according to the embodiment of the present invention;

Fig. 14 is a schematic diagram of a partial circuit structure of the AC sampling unit of the data acquisition module of the control unit of the type II power energy efficiency management terminal according to the embodiment of the present invention;

Fig. 15 is a schematic block diagram of the general principle of the type II power energy efficiency management system according to the embodiment of the present invention.

Explanation of reference signs: 10-housing main body, 11-LCD display, 12-indicator, 13-button, 20-housing installation part, 21-connecting terminal, 22-rail groove, 23-card post, 24 -fixed protrusion, 25-fastening part, 100-control unit, 200-power supply module, 210-communication power supply circuit, 220-data acquisition power supply circuit, 230-control unit power supply circuit, 300-data acquisition module, 310-DC Analog acquisition unit, 320-AC sampling unit, 400-communication module, 410-RS485 communication unit, 420-Ethernet communication unit, 430-infrared communication unit, 500-real-time clock, 600-storage unit, 700-display module, 710-LCD display unit, 720-LED indication unit, 730-button circuit, 800-remote signal displacement detection circuit, 900-remote control output circuit.

detailed description

Embodiments of the present invention are described in detail below:

In the energy efficiency management system, it is necessary to detect and manage the power environment through a certain integrated device that is responsible for collecting, processing and analyzing information on non-electrical quantities (such as flow, pressure, temperature, humidity, etc.). To collect and process on-site power environment information, it is necessary to exchange data with power energy efficiency information centralized and interactive terminals. Under such requirements and application environments, power energy efficiency management terminals emerged as the times require.

As shown in Fig. 1 to Fig. 6, the present invention provides a type II power energy efficiency management terminal, which adopts three-phase four-wire 3*220/380V power supply, and the current measurement range is 5 (10) A. The type II power energy efficiency management terminal includes a terminal housing (not shown in the figure), a control unit 100 disposed in the terminal housing, a power module 200 connected to the control unit 100, a storage unit 600, a data acquisition module 300, The communication module 400 and the display module 700. The Type II power energy efficiency management terminal has a DC analog quantity acquisition unit 310 and an AC sampling unit 320, which can collect non-electrical quantity (such as flow, pressure, temperature, humidity, etc.) information (that is, DC analog quantity data) detected by the sensor , and measure and collect data on electric quantities such as current, voltage and power, so as to realize the detection and management of the power environment. The type II power energy efficiency management terminal can collect the information of the application environment for further analysis and processing. Its main functions include non-electrical quantity measurement, electric energy measurement, measurement data recording of voltage, current and power, event recording, and other data. analyze. Electric energy measurement includes reactive power and active power phase separation or combined phase power measurement, power settlement and freezing.

As shown in Figures 1 to 5, the terminal housing of the above-mentioned type II power energy efficiency management terminal mainly includes a housing main part 10 and a housing installation part 20, the housing main part 10 is set in a square shape, and a display module is arranged on it 700 and the peripheral parts of the button circuit 730 , such as the liquid crystal display 11 , various indicator lights 12 , and various buttons 13 . And the housing main body 10 is provided with unit module circuits such as a control unit 100 , a storage unit 600 , a data acquisition module 300 , a communication module 400 and the like. In addition, the housing installation part 20 is designed as a U-shaped structure, and the above-mentioned housing body part 10 is embedded in the middle groove of the U-shaped structure of the housing installation part 20, and the two sides of the housing installation part 20 protrude A row of connection terminals 21 are respectively installed and arranged on some parts, which are used for input and output connections of each circuit module. Moreover, the back side of the housing installation part 20 is also provided with a guide rail groove 22 for installation and fixing, so that the type II power energy efficiency management terminal can be installed on a guide rail. In addition, one side of the guide rail groove 22 has a plurality of fixing protrusions 24, and the other side has a plurality of retractable clamping posts 23, which can fasten and fix the type II power energy efficiency management terminal on the guide rail. In addition, a fastening part 25 is provided on the back side of the housing installation part 20, and the type II power energy efficiency management terminal can be hung on the wall by using screws.

Specifically, the control unit 100 of the above-mentioned type II power energy efficiency management terminal is installed inside the terminal housing. The control unit 100 uses a high-speed controller whose core is the ARM3 series STM32F107VC. The frequency means the maximum processing speed is 72MHz, with 256Kbytes Flash storage space, 64Kbytes SRAM, Ethernet MAC interface, and USB2.0full-speed device/host/OTG interface. The control unit 100 is used for data information processing and analysis, such as the analysis and processing of non-electrical quantities, electrical quantities and other data information. Moreover, the Type II power energy efficiency management terminal also includes a real-time clock 500 connected to the control unit 100 for providing accurate and high-precision time information and outputting clock pulse signals. The real-time clock 500 has a hard clock chip with an internally integrated temperature-compensated crystal oscillator. The specific device used is RX8025T, which is a hard clock chip with an internally integrated 32.768KHz temperature-compensated crystal oscillator, which can guarantee a travel time error of 0.5s/d in the temperature range of -40 to 70°C, and the terminal supports real-time mode.

Moreover, the storage unit 600 connected to the control unit 100 is used to store various information, conversion or exchange information collected by the main control unit. The program and data memory used in the storage unit 600 is SST's 4Mbyte flash memory chip with a storage speed of 150Kbit/s. invalidated. The memory chip is packaged in a general-purpose package, which can be expanded according to system requirements, and its communication interface is SPI. In addition, in order to ensure that important data is lost due to abnormal operation of the terminal, the system additionally adds a non-volatile ferroelectric memory FM24CL16 to store important data and parameters. The year is not invalid, and its communication interface is IIC.

As shown in Fig. 7 to Fig. 9, the above-mentioned type II power energy efficiency management terminal also includes a power supply module 200, which includes a linear transformer with three outputs, and each secondary of the transformer has a withstand voltage capacity of more than 2000V , and the communication power supply circuit 210 (as shown in Figure 7 ), the data acquisition power supply circuit 220 (as shown in Figure 8 ), the control unit power supply circuit 230 (as shown in Figure 9 ), and the corresponding connection with the linear transformer, three power supply circuits They are respectively used to supply power to the communication module 400, the data acquisition module 300, and the control unit 100. Moreover, a power protection circuit is provided at the front end of the linear transformer, and the power protection circuit can ensure that the circuit is not damaged and can be recovered under overvoltage conditions. Specifically, the control unit power circuit 230 adopts a DC-DC power chip L5970D, and the maximum output current can reach 1A. And the other two power supply circuits adopt 78L05 power supply chip, which can output 5V with stable voltage. In addition, a power monitoring chip ADM823 is added to the power module 200. When the control unit is abnormal and cannot output pulse signals to the ADM823, the ADM823 chip can reset the control unit and restart the system.

In addition, as shown in Figures 12 to 13, a data acquisition module 300 connected to the control unit 100 and the power supply module 200 is also included, and the data acquisition module 300 includes a DC analog quantity acquisition unit 310 for acquiring measured non-electrical quantities (temperature, humidity, air pressure, flow, etc.) data. According to the different environments of the monitored objects, various sensors (temperature sensors, humidity sensors, pressure sensors, flow sensors, etc.) are installed on site. These environmental quantities include temperature, humidity, air pressure, flow, etc. Data collection is performed on the DC analog quantities output by these non-electrical quantities at time intervals, and the measurement accuracy is required to be within ±1%. The DC analog acquisition unit 310 includes two independent DC analog sampling circuits (as shown in FIG. 12 ), and a DC analog isolation for isolating the DC analog sampling circuit and power supply (i.e., the data acquisition power supply circuit 220). circuit (as shown in Figure 13). That is, the DC analog acquisition unit 310 is composed of a power supply, a sampling circuit, and an isolation circuit. Moreover, the front end of the DC analog sampling circuit includes a TVS tube and a Zener tube connected to the current signal, a DC current sampling resistor connected behind the TVS tube and the Zener tube, and a dual-channel sampling and measuring chip connected to the DC current sampling resistor. Specifically, two independent DC analog inputs are designed, and the AD7911 dual-channel sampling and measurement chip of Analog Devices is used. The power supply is input by the isolated DC-DCTPV0512 and stabilized by SPX5205M5 to output 5V. The isolation circuit is mainly composed of the chip ADM1411 which can provide multi-channel signal isolation and peripherals. The current signal input by the front end of the sampling circuit is converted into a voltage by a 200R DC current sampling resistor and then measured by the sampling and measurement chip AD7911MR. The front end adds a TVS tube to prevent overvoltage and a Zener tube to prevent reverse connection. The sampling and measurement chip uses AD7911 with 16-bit resolution, which can be controlled within the error range of 3.5PPM in the wide temperature range of –40°C to +105°C. The required range of the measured DC analog quantity is 4/20mA, while the measurement range of the terminal equipment is 3.3V±100mV, and the measurement accuracy reaches 0.005mV, which is higher than the required measurement accuracy. The DC analog acquisition unit adopts >2000VDC electrical isolation in both power supply and signal transmission, which can ensure that the terminal is minimally affected by external electrical influences.

As shown in FIG. 14 , the data collection module 300 further includes an AC sampling unit 320 for collecting electrical quantity information such as current, voltage and power. Specifically, the AC sampling includes the measurement of three-phase AC voltage and AC current, that is, the AC sampling unit includes a three-phase AC voltage measurement circuit and a three-phase AC current measurement circuit. The voltage measurement circuit and the current measurement circuit share a three-phase AC measurement chip. The three-phase AC measurement chip adopts the three-phase power AC measurement chip ADE7878, and the A/B/C three-phase current and voltage measurement circuits are independent. Among them, the front-end signal processing part of the voltage measurement circuit of each phase uses the 2mA/2mA current type voltage transformer of Xingge SPT204A, and the SCT254AX (5A/2.5mA) current transformer is used as the current strength signal conversion device at the front end of the current measurement circuit. The three-phase AC measurement chip uses the ADE7858 with an effective precision of 24 bits to sample and process the current and voltage signals. The three-phase AC measurement chip ADE7858 can work normally in the temperature range of -40℃～+85℃ and guarantee the error range of 10ppm/℃. In addition, the ADE7858 can also operate independently, measure power consumption information such as active power and reactive power, and communicate with the MCU through the SPI interface or IIC interface for real-time data interaction.

Further, a current-type voltage transformer SPT204A (2mA/2mA) is used at the front end of the voltage measurement circuit, and the 220V measurement voltage is converted into a 2mA measurement current through voltage current limiting, and then converted into a voltage through a 100R AC voltage sampling resistor, input To the three-phase AC measurement chip ADE7878. In addition, a current transformer SCT254AX (5(10)A/2.5mA<0.1%) is used at the front end of the current measurement circuit, which is converted into a voltage through a 26R AC current sampling resistor and input to the three-phase AC measurement chip ADE7878, and the current measurement adopts differential The input measurement method and adding TVS tubes on both sides of the differential signal can prevent the three-phase AC measurement chip from being damaged due to excessive measurement voltage.

In addition, the type II power energy efficiency management terminal also includes a communication module 400 connected to the control unit 100 , which is the key to the type II power energy efficiency management terminal, including an infrared communication unit 430 , an Ethernet communication unit 420 , and an RS485 communication unit 410 . Among them, the infrared communication unit 430 is far-infrared communication, and the communication distance is up to 10m. The circuit is composed of two parts: receiving and sending. The sending signal is a 38Khz pulse modulation signal. The receiver itself has a 38Khz filtering function to enhance the anti-interference ability. The Ethernet communication unit 420 adopts the design scheme of the MAC interface of the Ethernet controller KSZ8031 and STM32F107. The communication mode between the Ethernet controller and the MAC interface adopts RMII, and the communication speed reaches 50Mbit/s. As shown in Figures 10 to 11, the RS485 communication unit 410 includes two RS485 communication interfaces, RS485-1 and RS485-2, which come out through terminal leads. The maximum communication speed of one RS485-1 communication interface is 2400bit/s, and only As a meter reading port; the other RS485-2 communication interface has a signal speed of 115200bit/s, which can be used not only as a meter reading port, but also as a routine inspection and maintenance port for Type II power energy efficiency management terminals. Moreover, the above-mentioned RS485 hardware interface uses a non-directional 485 chip, that is, the differential line can communicate without strictly following the positive and negative wiring.

The above three communication methods adopt two communication protocols in total, one is an uplink communication protocol, and the other is a downlink communication protocol. Among them, the infrared communication method and the RS485-2 communication method use the 645/2007 uplink communication protocol, and the uplink terminal communication can read the data of the energy efficiency terminal through the RS485-2 communication interface; in addition, the type II power energy efficiency can be read through the infrared handheld Manage terminal data and modify terminal parameter information; Ethernet only has a program upgrade function for the time being, and its application can be promoted according to different application environments in the future. The entire uplink communication implements the standard "DL/T645-2007 Multi-function Energy Meter Communication Protocol" and its extended protocol. In addition, the RS485-1 communication method uses the 645/2007 downlink communication protocol, which is responsible for reading the data of the energy meter. This communication interface also has a relay function, which can improve the communication quality and upgrade the terminal program.

In addition, the Type II power energy efficiency management terminal also includes a display module 700 connected to the control unit 100 on the terminal casing, and the display module 700 includes an LCD display unit 710 and an LED indicator unit 720 . The LCD display unit 710 includes a liquid crystal module, a liquid crystal driver chip integrated in the liquid crystal module, and a liquid crystal display 11 connected to the liquid crystal driver chip, and the liquid crystal display 11 is arranged on the main body part 10 of the casing. The LCD display unit 710 adopts a 160*160mm liquid crystal module display mode, because the liquid crystal module has integrated a liquid crystal driver chip, so in design, only through the bus data transmission of the control unit 100, the liquid crystal display and brightness adjustment can be realized. LCD display can be controlled by reset pin, LCD backlight control, etc. The liquid crystal display menu includes a first-level menu and a first-level menu, while the first-level menu includes non-electrical quantity information wheel display, and the first-level menu includes terminal parameters, system information, and terminal maintenance. In addition, the LED indicator unit 720 is also arranged on the main body part 10 of the housing, including various indicator lights 12 that use two kinds of bright red light emitting diodes and green light emitting diodes. The LED indicator unit 710 includes RS485-1 and RS485-2 two-color transceiver lights, 3.3V power indicator lights, running lights, remote warning lights, active and reactive lights, and the active and reactive lights can be used to measure the power of energy efficiency monitoring terminals .

In addition, the type II power energy efficiency management terminal also includes a button circuit 730 connected to the control unit 100 , the button circuit 730 includes a button 13 arranged on the terminal housing, and a 100nf anti-misjudgment capacitor connected to the button 13 . The button circuit 730 adopts a common I/O input detection method, and a 100nf capacitor can prevent misjudgment caused by mode jitter. The basic operation of the terminal is realized by four buttons 13 of "Up", "Down", "OK" and "Cancel", which is simple and convenient.

In addition, the type II power energy efficiency management terminal also includes a remote signal displacement monitoring circuit 800 and a remote control output circuit 900 connected to the control unit 100 . The remote signal displacement monitoring circuit 800 includes a remote signal protection circuit, a remote signal isolation circuit, and two remote signal input interfaces with active common cathode connection, and each interface has anti-static and malfunction protection. The remote control output circuit can control a 5(10)A 220V line through a 5V control signal, which includes a relay and a remote control drive circuit set at the front end of the relay. ), in addition to using low-power Panasonic relays, in order to increase the stability and reliability of the control signal, a drive circuit is also added to the front end of the relay.

As shown in Figure 15, the present invention also provides a type II power energy efficiency management system, including a plurality of the above-mentioned type II power energy efficiency management terminals, and a power energy efficiency information concentration and interactive terminal connected to the type II power energy efficiency management terminals (both It can communicate with each other through RS485, power carrier, micro-power wireless and other communication methods), and the test host connected to the power energy efficiency information centralized and interactive terminal, and also includes the water and electricity measuring instrument connected to the type II power energy efficiency management terminal , Non-electrical quantity sampling sensors (such as current sensors, digital sensors), electrical quantity acquisition instrumentation equipment, and other instrumentation equipment, etc.

The type II power energy efficiency management terminal and system provided by the present invention have the functions of non-electric quantity measurement, electric quantity measurement, electric energy measurement, measurement data record, event record, energy efficiency data analysis, communication, I/O configuration, software upgrade, pulse output , keyboard operation and display, etc. dedicated functions; also has innovative data processing capabilities, that is, electric energy measurement, measurement data recording, event recording, energy efficiency data analysis, etc. Among them, electric energy measurement includes reactive power and active power phase separation or combined phase power measurement, power settlement and freezing; measurement data records include voltage, current, power, temperature, humidity, pressure, flow, etc., including application environment information data; event records include power factor limit, non-electrical ABC voltage and current unbalance over limit, terminal power-on and power-off, terminal parameter setting and other events; energy efficiency data analysis refers to using the data collected by the monitoring terminal to calculate the performance of the monitored equipment or system by embedding the energy efficiency model. Energy conversion efficiency, and the reliability of the terminal efficiency value can be checked by the calculated value of the system; professional external interfaces, such as current and voltage input interfaces, DC analog input interfaces, electrical quantity acquisition interfaces, communication input and output interfaces, control interfaces, Remote communication interface, etc.; consider multiple possibilities and have expansion performance, which can fully adapt to the current or future energy efficiency management system operating environment design, no matter in terms of performance or function, its application runs through the use of the entire energy efficiency management system; in addition, modularization The design makes its cost controllable, making its advantages more significant in the existing energy efficiency management terminals.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but should not be construed as limiting the patent scope of the invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (9)

1. A Type II power energy efficiency management terminal, characterized in that it includes a terminal housing, a control unit disposed in the terminal housing, a power module connected to the control unit, a storage unit, a data acquisition module, Communication module and display module; The data acquisition module includes a DC analog acquisition unit for acquiring temperature, humidity, air pressure, and flow non-electric quantity data obtained by measurement, and an AC sampling unit for acquiring electrical quantity information such as current, voltage and power; the The DC analog acquisition unit includes two independent DC analog sampling circuits and a DC analog isolation circuit; and the front end of the DC analog sampling circuit includes a TVS tube and a Zener tube connected to the current signal, and connected to the A DC current sampling resistor behind the TVS tube and the Zener tube, and a dual-channel sampling and measuring chip connected to the DC current sampling resistor; The AC sampling unit includes a three-phase AC voltage measurement circuit and a three-phase AC current measurement circuit; the three-phase AC voltage measurement circuit includes a current-type voltage transformer, an AC voltage sampling resistor connected to the voltage transformer, and a A three-phase AC measurement chip connected to the AC voltage sampling resistor; the three-phase AC current measurement circuit includes a current transformer, an AC current sampling resistor connected to the current transformer, and the AC current sampling resistor is connected to the three-phase AC measurement chip connection. 2. The type II power energy efficiency management terminal according to claim 1, wherein the power supply module includes a linear transformer with three outputs, and a communication power supply circuit and a data acquisition power supply circuit correspondingly connected to the linear transformer . The power supply circuit of the control unit; moreover, the front end of the linear transformer is connected with a power supply protection circuit. 3. The type II power energy efficiency management terminal according to claim 1, wherein the communication module includes an infrared communication unit, an Ethernet communication unit, and an RS485 communication unit; Wherein, the RS485 communication unit includes two RS485 communication interfaces, one of which is an RS485-1 communication interface for the meter reading port; the other is an RS485-2 communication interface for the meter reading port and the routine inspection and maintenance port. 4. The type II power energy efficiency management terminal according to claim 1, further comprising a remote signaling displacement monitoring circuit connected to the control unit, the remote signaling displacement monitoring circuit including a remote signaling protection circuit, Remote signaling isolation circuit, and remote signaling input interface for two-way active common cathode access. 5. The Type II power energy efficiency management terminal according to claim 1, further comprising a remote control output circuit, the remote control output circuit comprising a relay, and a remote control drive circuit arranged at the front end of the relay. 6. The type II power energy efficiency management terminal according to claim 1, further comprising a real-time clock connected to the control unit, the real-time clock has a hard clock chip, and the hard clock chip is internally integrated with temperature compensation crystal oscillator. 7. The type II power energy efficiency management terminal according to claim 1, wherein the display module includes an LCD display unit and an LED indicator unit arranged on the terminal housing; The LCD display unit includes a liquid crystal module, a liquid crystal driver chip integrated in the liquid crystal module, and a liquid crystal display connected to the liquid crystal driver chip; The LED indicator unit includes RS485 two-color transceiver lights, power indicator lights, running lights, remote warning lights, and active and reactive lights for measuring the power of energy efficiency monitoring terminals. 8. The type II power energy efficiency management terminal according to claim 1, further comprising a button circuit connected to the control unit, the button circuit including buttons arranged on the terminal housing, and connected to the The 100nf anti-misjudgment capacitor connected to the button. 9. A Type II power energy efficiency management system, characterized in that it comprises a plurality of Type II power energy efficiency management terminals as claimed in any one of claims 1-8, and the power energy efficiency connected to the Type II power energy efficiency management terminals An information concentration and interaction terminal, and a test host connected to the power energy efficiency information concentration and interaction terminal; and also includes a water and electricity measuring instrument, a non-electric quantity sampling sensor, and an electric quantity collection connected to the type II power energy efficiency management terminal. meter.