CN111009904A - Integrated controller - Google Patents

Integrated controller Download PDF

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Publication number
CN111009904A
CN111009904A CN201911221241.8A CN201911221241A CN111009904A CN 111009904 A CN111009904 A CN 111009904A CN 201911221241 A CN201911221241 A CN 201911221241A CN 111009904 A CN111009904 A CN 111009904A
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resistor
pin
capacitor
voltage
chip
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CN201911221241.8A
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Chinese (zh)
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叶海鹏
陈子栋
李银宝
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Tysen Kld Group Co ltd
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Tysen Kld Group Co ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
    • H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
    • H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
    • H02J3/1864—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein the stepless control of reactive power is obtained by at least one reactive element connected in series with a semiconductor switch
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/30—Reactive power compensation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/22—Flexible AC transmission systems [FACTS] or power factor or reactive power compensating or correcting units

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Electrical Variables (AREA)

Abstract

The invention relates to the technical field of power equipment, in particular to a comprehensive controller. The comprehensive controller can be matched with a reactive power compensation device to be put into a large-capacity capacitor in the process of being used together with the reactive power compensation device, when the reactive power compensation device breaks down, the comprehensive controller can perform static compensation according to sampling to be used as temporary compensation, and the loss of voltage fluctuation to other devices of a power grid caused by reactive power unbalance due to the fact that the reactive power of the power grid cannot be compensated because the reactive power compensation device does not work is avoided; the dynamic compensation function of the reactive compensation device is reasonably utilized, the problem that the reactive compensation device is short in large-capacity compensation is solved, the economic ratio of performance and price is fully exerted, and the method has important significance for social and economic production.

Description

Integrated controller
Technical Field
The invention relates to the technical field of power equipment, in particular to a comprehensive controller.
Background
The traditional static reactive power compensation device can only realize large-capacity static compensation, can realize accurate calculation through a controller, and can realize compensation control over more than 97% through a plurality of capacitors, so that the static reactive power compensation device has the advantages of low price, but has the defect that fine compensation can not be realized for reactive power response of a power grid, through social development, the dynamic compensation device which is mainly used in the current market has the defects of high response speed, high precision and 99% compensation rate, and has the defects of high cost due to the use of an IGBT (insulated gate bipolar transistor) inversion module, limited capacity and unsuitability for compensation of a large-capacity system.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a comprehensive controller which reasonably utilizes the dynamic compensation function of the reactive compensation device, solves the problem that the reactive compensation device is short in large-capacity compensation, and fully exerts the economic ratio of performance and price.
In order to solve the technical problems, the technical scheme adopted by the invention for solving the technical problems is as follows:
an integrated controller comprising: the device comprises a voltage and current sampling module, an operation processing module, a single chip microcomputer and a signal output module;
the voltage and current sampling module is used for acquiring voltage and current signals of a power grid, converting the acquired voltage and current signals of the power grid into voltage signals and transmitting the voltage signals to the operation processing module;
the operation processing module is used for carrying out data processing on the voltage signal output by the sampling module to obtain an analog signal and transmitting the analog signal to the single chip microcomputer;
the singlechip is used for carrying out data processing on the analog signal output by the operation processing module to obtain the reactive power calculation for the reactive power automatic compensation of the power grid;
and the signal output module at least comprises a communication control circuit and is used for converting the reactive compensation signal obtained by the singlechip into a control mode signal required by the power grid system and outputting and controlling the corresponding reactive compensation capacitor.
Preferably, the voltage and current sampling module comprises a current sampling circuit and a voltage sampling circuit, the current sampling circuit comprises a current transformer CTA1, an inductor L10 and a resistor (R127, R129 and R131), one end of the resistor R129 is connected with pin 1 of the current transformer CTA1, the other end of the resistor R129 is connected with the resistor R131, the other end of the resistor R131 is grounded, one end of the inductor L10 is connected with pin 1 of the current transformer CTA1, and the other end of the inductor L10 is connected with the resistor R127.
Preferably, the voltage sampling circuit comprises a voltage transformer PTA1 and resistors (R126, R128 and R130), one end of the resistor R128 is connected with pin 1 of the voltage transformer PTA1, the other end of the resistor R130 is connected with the resistor R130, the other end of the resistor R130 is grounded, and one end of the resistor R127 is connected with pin 1 of the voltage transformer PTA 1.
Preferably, the arithmetic processing module includes a current processing circuit and a voltage processing circuit, the current processing circuit includes a current processing chip U5, capacitors (C35, C33), and resistors (R28, R29, R30, R33), the capacitor C35 is connected to the pin 10 of the current processing chip U5, the resistor R33 is connected to one end of the resistor R30, the other end of the resistor R30 is grounded, the resistor R30 and the resistor R33 are connected to the output end of the capacitor C35, one end of the resistor R29 is connected to the pin 9 of the current processing chip U5, the other end of the resistor R6384 is grounded, one end of the resistor R28 is connected to the pin 9 of the current processing chip U5, the other end of the resistor R3727 is connected to the capacitor C33, and the other end of the capacitor C.
Preferably, the voltage processing circuit includes a voltage processing chip U8, capacitors (C41, C44), and resistors (R55, R56, R60, and R61), the capacitor C44 is connected to the pin 10 of the voltage processing chip U8, the resistor R61 is connected to one end of the resistor R60, the other end of the resistor R60 is grounded, the resistor R60 and the resistor R61 are connected to the output end of the capacitor C44, one end of the resistor R55 is connected to the pin 9 of the voltage processing chip U8, the other end is grounded, one end of the resistor R56 is connected to the pin 9 of the voltage processing chip U8, the other end is connected to the capacitor C41, and the other end of the capacitor C41 is grounded.
Preferably, the signal output module at least comprises three communication control circuits, namely a 232 communication circuit, a 485 communication circuit and CAN communication, the 232 communication circuit comprises a level conversion chip U1 and capacitors (C15, C16, C18, C19 and C20), a pin 1 of the level conversion chip U1 is connected with one end of the capacitor C15, the other end of the capacitor C15 is connected with a pin 3 of the level conversion chip U1, a pin 4 of the level conversion chip U1 is connected with one end of the capacitor C16, the other end of the capacitor C16 is connected with a pin 5 of the level conversion chip U1, a pin 1 of the level conversion chip U1 is connected with one end of the capacitor C15, the other end of the capacitor C15 is connected with a pin 3 of the level conversion chip U1, a pin 2 of the level conversion chip U1 is connected with a capacitor C18, a capacitor C18 is connected with a capacitor C20, a capacitor C20 is grounded, a pin 6 of the level conversion chip U1 is connected with one end of the capacitor C19, the other end of the capacitor C15 is grounded, and pins 13 and 14 of the level conversion chip U1 are connected with an external display screen.
Preferably, the 485 communication circuit includes a bidirectional level conversion chip U6, a bidirectional transient diode (D1, D2, D3), and a resistor R25, one end of the bidirectional transient diode D1 is connected to a pin 13 of the bidirectional level conversion chip U6, the other end of the bidirectional transient diode D1 is connected to a resistor R25, one end of the bidirectional transient diode D2 is connected to a pin 13 of the bidirectional level conversion chip U6, the other end of the bidirectional transient diode D3 is grounded, one end of the bidirectional transient diode D3 is connected to a pin 12 of the bidirectional level conversion chip U6, and the other end of the bidirectional transient diode D3 is.
Preferably, the CAN communication includes a level conversion chip U9 and an inductor (L5, L6), one end of the inductor L5 is connected to a pin 6 of the level conversion chip U9, and one end of the inductor L6 is connected to a pin 7 of the level conversion chip U9.
The invention has the beneficial effects that:
the comprehensive controller can be matched with a reactive power compensation device to be put into a large-capacity capacitor in the process of being used together with the reactive power compensation device, when the reactive power compensation device breaks down, the comprehensive controller can perform static compensation according to sampling to be used as temporary compensation, and the loss of voltage fluctuation to other devices of a power grid caused by reactive power unbalance due to the fact that the reactive power of the power grid cannot be compensated because the reactive power compensation device does not work is avoided; when the reactive power of the power grid meets the minimum capacitance value set by the comprehensive controller, the capacitor can be put into the reactive power compensation device preferentially, and the dynamic part of the reactive power compensation device is compensated; when the reactive power compensation device cannot work normally due to other factors, the comprehensive controller carries out reactive power calculation according to self sampling to carry out reactive power automatic compensation on the power grid, the dynamic compensation function of the reactive power compensation device is reasonably utilized, the problem that the reactive power compensation device is in a short plate with large-capacity compensation is solved, the economic ratio of performance and price is fully exerted, and the comprehensive controller has important significance for social and economic production.
Drawings
FIG. 1 is a schematic diagram of a voltage current sampling module of the present invention.
FIG. 2 is a schematic diagram of a current processing circuit of the present invention.
FIG. 3 is a schematic diagram of a voltage processing circuit of the present invention.
FIG. 4 is a schematic diagram of the single-chip microcomputer of the present invention.
Fig. 5 is a schematic diagram of a 232 communication circuit according to the present invention.
Fig. 6 is a schematic view of a 485 communication circuit of the present invention.
Fig. 7 is a schematic diagram of a CAN communication circuit of the present invention.
Fig. 8 is a schematic diagram of an ethernet communication module according to the present invention.
FIG. 9 is a schematic diagram of a USB communication circuit according to the present invention.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
Referring to fig. 1-9, an integrated controller includes: the device comprises a voltage and current sampling module, an operation processing module, a single chip microcomputer and a signal output module;
the voltage and current sampling module is used for acquiring voltage and current signals of a power grid, converting the acquired voltage and current signals of the power grid into voltage signals and transmitting the voltage signals to the operation processing module;
the operation processing module is used for carrying out data processing on the voltage signal output by the sampling module to obtain an analog signal and transmitting the analog signal to the single chip microcomputer;
the singlechip is used for carrying out data processing on the analog signal output by the operation processing module to obtain the reactive power calculation for the reactive power automatic compensation of the power grid;
and the signal output module at least comprises a communication control circuit and is used for converting the reactive compensation signal obtained by the singlechip into a control mode signal required by the power grid system and outputting and controlling the corresponding reactive compensation capacitor.
The comprehensive controller can be matched with a reactive power compensation device to be put into a large-capacity capacitor in the process of being used together with the reactive power compensation device, when the reactive power compensation device breaks down, the comprehensive controller can perform static compensation according to sampling to be used as temporary compensation, and the loss of voltage fluctuation to other devices of a power grid caused by reactive power unbalance due to the fact that the reactive power of the power grid cannot be compensated because the reactive power compensation device does not work is avoided; when the reactive power of the power grid meets the minimum capacitance value set by the comprehensive controller, the capacitor can be put into the reactive power compensation device preferentially, and the dynamic part of the reactive power compensation device is compensated; when the reactive power compensation device cannot work normally due to other factors, the comprehensive controller carries out reactive power calculation according to self sampling to carry out reactive power automatic compensation on the power grid, the dynamic compensation function of the reactive power compensation device is reasonably utilized, the problem that the reactive power compensation device is in a short plate with large-capacity compensation is solved, the economic ratio of performance and price is fully exerted, and the comprehensive controller has important significance for social and economic production.
The integrated controller is provided with 32 switching switches, various compensation modes can be combined according to the capacitance capacity, and the power supply requirements of most power grids are met; after the operation, the reactive compensation device DSP high-speed processing chip dynamically follows the reactive power of the power grid to carry out dynamic compensation, the comprehensive controller CAN accurately calculate the reactive compensation capacity of the power grid, the number of capacitor groups is input into the comprehensive controller through a CAN bus, and the compensation device then compensates the reactive dynamic part.
The voltage and current sampling module comprises a current sampling circuit and a voltage sampling circuit, the current sampling circuit comprises a current transformer CTA1, an inductor L10 and a resistor (R127, R129 and R131), one end of the resistor R129 is connected with a pin 1 of the current transformer CTA1, the other end of the resistor R129 is connected with the resistor R131, the other end of the resistor R131 is grounded, one end of the inductor L10 is connected with a pin 1 of the current transformer CTA1, and the other end of the inductor L10 is connected with the resistor R127.
A pin 3 and a pin 4 of a current transformer CTA1 are externally connected current transformers, input current of the current transformer CTA1 is 0-5A, 0-5mA equal-ratio current is output through a coil tie ratio pin 1 and a pin 2, voltage drop is generated through a parallel resistor R129 to be changed into voltage signals, and R127 and R131 are used as current limiting resistors.
The voltage sampling circuit comprises a voltage transformer PTA1 and resistors (R126, R128 and R130), wherein one end of the resistor R128 is connected with a pin 1 of the voltage transformer PTA1, the other end of the resistor R128 is connected with the resistor R130, the other end of the resistor R130 is grounded, and one end of the resistor R127 is connected with a pin 1 of the voltage transformer PTA 1.
Similarly, pin 3 and pin 4 of the voltage transformer PTA1 are respectively connected with the zero line and the A phase voltage. The A phase loop is connected with a 248K resistor in series, and the 248K resistor has a current limiting effect because a voltage transformer is used for current conversion, and the bundle ratio is 1: 1, the current of the input of 220V voltage is limited below 1.25mA and is smaller than the input current nominal of the transformer, and the design is reasonable. The output pin 1 and the pin 2 output 0-2mA equal ratio current, voltage drop is generated through the parallel resistor R128 to become a voltage signal, and the R126 and the R130 are used as current limiting resistors.
Referring to fig. 1, the voltage signals sampled by the voltage sampling circuit are UAO, UBO and UCO, respectively, and the electronic components adopted by the voltage signals UAO, UBO and UCO are communicated, and the circuit structures are the same; the current signals sampled by the sampling circuit are IAO, IBO and ICO respectively, electronic elements adopted by the current signals IAO, IBO and ICO are communicated, and the circuit structures are the same; the adopted voltage signal and current signal are output to the operation processing module.
The operation processing module comprises a current processing circuit and a voltage processing circuit, the current processing circuit comprises a current processing chip U5, capacitors (C35 and C33) and resistors (R28, R29, R30 and R33), the capacitor C35 is connected with a pin 10 of the current processing chip U5, a resistor R33 is connected with one end of a resistor R30, the other end of the resistor R30 is grounded, the resistor R30 and a resistor R33 are connected with the output end of the capacitor C35, one end of the resistor R29 is connected with a pin 9 of the current processing chip U5, the other end of the resistor R30 is grounded, one end of the resistor R28 is connected with a pin 9 of the current processing chip U5, the other end of the resistor R3727 is connected with a capacitor C33, and the other end of the capacitor.
The voltage processing circuit comprises a voltage processing chip U8, capacitors (C41, C44) and resistors (R55, R56, R60 and R61), wherein the capacitor C44 is connected with a pin 10 of the voltage processing chip U8, a resistor R61 is connected with one end of a resistor R60, the other end of the resistor R60 is grounded, the resistor R60 and a resistor R61 are connected with the output end of the capacitor C44, one end of the resistor R55 is connected with a pin 9 of the voltage processing chip U8, the other end of the resistor R55 is grounded, one end of the resistor R56 is connected with a pin 9 of the voltage processing chip U8, the other end of the resistor R55 is connected with a capacitor C41, and the other end of the capacitor.
The operation processing module processes data of voltage signals output by the current and voltage sampling circuits to enable the single-chip microcomputer ADC to recognize analog signals, and the working modes of the current processing circuit and the voltage processing circuit are the same, so the embodiment mainly explains the processing process aiming at the current signals in detail, firstly, the current IAO is converted into a voltage signal to enter a C35 capacitor, because the capacitor has the characteristic of direct-current isolation, the signal output from the capacitor is an alternating current signal without direct-current content, resistors R30 and R33 are resistors connected in series between 3.3V and the ground to perform the function of resistor voltage division, and the middle of the resistors R30 and R33 is connected to the output end of the C35 capacitor, at the moment, the signal output from the capacitor C35 is an alternating current signal with direct-current content of 1.65V, and the three operational amplifiers of the resistors R28 and R29 and the current processing chip U5 form a non-phase input amplifier with the multiple of the same
Figure RE-GDA0002405077520000071
RfIs R29 with a resistance of 30K, R1The resistance of R28 is 15K, and the magnification Au is 3 times. The capacitor C41 exists in the circuit for isolating direct current, and it is known from the virtual short that Vin + is Vin-, when the voltage of pin 9 of U8 is equal to the voltage of pin 10 of U8, the direct current does not form a negative feedback loop due to the existence of the capacitor C41, and does not participate in the amplification calculation, when Vin + inputs the ac voltage with the peak value of ± 200mV, Vout + Vin + Au + 200mV 3 + 600mV is the ac voltage, the voltage is bridged on the 1.65V direct current, finally Vout + 1.65V ± 600mV is the ac voltage of 1.05 mV-2.25 mV, and the output voltage signal is in the voltage signal range which can be identified by the single chip ADC and is 0-3.3V.
The single chip microcomputer is provided with an external 256M RAM and an external 256M FLASH, and when a CPU program and an internal memory are insufficient, the external FLASH and the RAM can be used.
Singlechip LPC1788 has external RAM and flash, chip U10(K4S561632C-TC) is COMS SDRAM, it has 54pin feet, A0-A12 is its address line, because this COMS SDRAM is 16bit wide data, singlechip CPU (A1-A13) connects to 16bit COMS SDRAM (A0-A12), that is, CPU A0 does not connect-this explains: the address received by the COMS SDRAM is the same regardless of whether A0 is a0 or a 1. When the CPU sends out addresses 0bxxxxxxxxx0 and 0bxxxxxxx 1, the SDRAM sees 0bxxxxxxxxx, and the data returned to the Memory Controller are all the same 16-bit data. Then the Memory Controller selects the lower 8 bits or the upper 8 bits to the CPU. However, for LPC1788, it can read 16 bits of data directly, so here the CPU's (A0-A12) are directly connected to the 16-bit COMS SDRAM (A0-A12).
The lower 8 bits of the data lines D0-D15 of chip U10(K4S561632C-TC) and the data lines (D0-D7) of chip U11 (K9F2G08U0A-P) share a set of lines, which control the operation of the two devices individually by an enable pin. COMS SDRAM (D0-D7) and flash (chip U10) are connected, and since COMS SDRAM is dynamic storage, it can not be saved by power down, so the single-chip program is downloaded to flash (chip U10) for storage, and when power is on, COMS SDRAM will read the program from (chip U10).
The signal output module at least comprises three communication control circuits, namely a 232 communication circuit, a 485 communication circuit and CAN communication, wherein the 232 communication circuit comprises a level conversion chip U1 and capacitors (C15, C16, C18, C19 and C20), a pin 1 of the level conversion chip U1 is connected with one end of a capacitor C15, the other end of the capacitor C15 is connected with a pin 3 of the level conversion chip U1, a pin 4 of the level conversion chip U1 is connected with one end of a capacitor C16, the other end of the capacitor C16 is connected with a pin 5 of the level conversion chip U1, a pin 1 of the level conversion chip U1 is connected with one end of a capacitor C15, the other end of the capacitor C15 is connected with a pin 3 of the level conversion chip U1, a pin 2 of the level conversion chip U1 is connected with a capacitor C18, a capacitor C18 is connected with a capacitor C20, a capacitor C20 is grounded, a pin 6 of the level conversion chip U20 is connected with one end of the capacitor C20, and a pin of the, pins 13 and 14 of the level conversion chip U1 are connected to an external display screen.
SP3232 (level shifting chip U1) employs a proprietary low dropout transmitter output stage that can achieve true RS-232 performance when powered by a 3.0V to 5.5V power supply using a dual charge pump, requiring only four external small size charge pump capacitors of 0.1 uF. The level shifting chip U1 ensures a data rate of 120kbps while maintaining the RS-232 output level.
The level shift chip U1 has a two-way receiver and a two-way driver, providing a 1uA off mode, effectively reducing power efficiency and delaying battery life of portable products. In the off mode, the receiver remains active, monitoring the external device, consuming only 1uA of supply current, and even when operating at high data rates, SP3232 can still maintain the minimum transmitter output voltage of plus or minus 5.0V required by the RS-232 standard.
The level conversion chip U1 can provide +5.5V (voltage-multiplying charge pump) and-5.5V (inverting charge pump) output voltages as long as the input voltage is within the range of 3.0V to 5.5V, the standard RS-232 communication is met, the anti-interference performance of signals is effectively guaranteed, the level conversion chip U1 has two-way level conversion, and the MAX 4232T and the MAX 4232R are used for communication of a display screen.
The 485 communication circuit comprises a bidirectional level conversion chip U6, a bidirectional transient diode (D1, D2, D3) and a resistor R25, wherein one end of the bidirectional transient diode D1 is connected with a pin 13 of the bidirectional level conversion chip U6, the other end of the bidirectional transient diode D1 is connected with a resistor R25, one end of the bidirectional transient diode D2 is connected with the pin 13 of the bidirectional level conversion chip U6, the other end of the bidirectional transient diode D3 is grounded, one end of the bidirectional transient diode D3 is connected with a pin 12 of the bidirectional level conversion chip U6, and the other end of the bidirectional transient diode D36.
The 485 communication circuit has the advantages of good noise interference resistance, high transmission rate and the like, the maximum transmission distance standard value is 4000 feet, and the 485 communication circuit has multi-station capability, so that a user can conveniently establish a device network by using a single RS-485 interface.
The RS-485 interface becomes the preferred serial interface due to the advantages of good noise interference resistance, long transmission distance, multi-station capability and the like. Because the half-duplex network formed by RS485 interfaces generally only needs two connecting wires, the RS485 interfaces all adopt shielded twisted-pair transmission
The CAN communication comprises a level conversion chip U9 and an inductor (L5, L6), one end of the inductor L5 is connected with a pin 6 of the level conversion chip U9, and one end of the inductor L6 is connected with a pin 7 of the level conversion chip U9.
The integrated controller is provided with the USB communication interface, the USB communication interface is connected with the USB communication circuit, and when operation information such as historical faults and equipment operation needs to be checked, the operation information can be automatically downloaded to mobile terminals such as a U disk, so that historical operation tracing is facilitated.
The chip U14(LM3526) provides overcurrent protection for the USB standard power switch and all host port applications. Its advantages are small size, low RoN and 1ms failure flag delay.
The integrated controller is also provided with an Ethernet communication module, when a computer in a power distribution room can upload data to a computer end through a network cable, the functions of power grid waveform, equipment state and the like can be more visually seen by matching with an equipment dynamic diagram, high performance and flexibility can be provided, and a terminal user is allowed to easily realize customization so as to meet the requirements of the application programs.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.

Claims (8)

1. An integrated controller, comprising: the device comprises a voltage and current sampling module, an operation processing module, a single chip microcomputer and a signal output module;
the voltage and current sampling module is used for acquiring voltage and current signals of a power grid, converting the acquired voltage and current signals of the power grid into voltage signals and transmitting the voltage signals to the operation processing module;
the operation processing module is used for carrying out data processing on the voltage signal output by the sampling module to obtain an analog signal and transmitting the analog signal to the single chip microcomputer;
the singlechip is used for carrying out data processing on the analog signal output by the operation processing module to obtain the reactive power calculation for the reactive power automatic compensation of the power grid;
and the signal output module at least comprises a communication control circuit and is used for converting the reactive compensation signal obtained by the singlechip into a control mode signal required by the power grid system and outputting and controlling the corresponding reactive compensation capacitor.
2. The integrated controller of claim 1, wherein the voltage-current sampling module comprises a current sampling circuit and a voltage sampling circuit, the current sampling circuit comprises a current transformer CTA1, an inductor L10, and a resistor (R127, R129, R131), one end of the resistor R129 is connected with pin 1 of the current transformer CTA1, the other end of the resistor R131 is connected with ground, the other end of the inductor L10 is connected with pin 1 of the current transformer CTA1, and the other end of the inductor L10 is connected with the resistor R127.
3. The integrated controller of claim 2, wherein the voltage sampling circuit comprises a voltage transformer PTA1, a resistor (R126, R128, R130), one end of the resistor R128 is connected to pin 1 of the voltage transformer PTA1, the other end of the resistor R128 is connected to the resistor R130, the other end of the resistor R130 is grounded, and one end of the resistor R127 is connected to pin 1 of the voltage transformer PTA 1.
4. The integrated controller of claim 1, wherein the operation processing module comprises a current processing circuit and a voltage processing circuit, the current processing circuit comprises a current processing chip U5, a capacitor (C35, C33), and a resistor (R28, R29, R30, R33), the capacitor C35 is connected to a pin 10 of the current processing chip U5, the resistor R33 is connected to one end of the resistor R30, the other end of the resistor R30 is grounded, the resistor R30 and the resistor R33 are connected to an output end of the capacitor C35, one end of the resistor R29 is connected to a pin 9 of the current processing chip U5, the other end of the resistor R28 is connected to a pin 9 of the current processing chip U5, the other end of the resistor R28 is connected to a pin 9 of the current processing chip C33, and the other end of the capacitor C33 is grounded.
5. The integrated controller of claim 4, wherein the voltage processing circuit comprises a voltage processing chip U8, a capacitor (C41, C44) and a resistor (R55, R56, R60, R61), the capacitor C44 is connected with a pin 10 of the voltage processing chip U8, a resistor R61 is connected with one end of the resistor R60, the other end of the resistor R60 is grounded, the resistor R60 and a resistor R61 are connected with the output end of the capacitor C44, one end of the resistor R55 is connected with a pin 9 of the voltage processing chip U8, the other end of the resistor R6335 is grounded, one end of the resistor R56 is connected with a pin 9 of the voltage processing chip U8, the other end of the resistor R56 is connected with a capacitor C41, and the other end of the capacitor C41 is grounded.
6. The integrated controller of claim 1, wherein the signal output module comprises at least three communication control circuits, i.e. a 232 communication circuit, a 485 communication circuit and CAN communication, the 232 communication circuit comprises a level conversion chip U1, capacitors (C15, C16, C18, C19 and C20), a pin 1 of the level conversion chip U1 is connected to one end of a capacitor C15, the other end of the capacitor C15 is connected to a pin 3 of the level conversion chip U1, a pin 4 of the level conversion chip U1 is connected to one end of a capacitor C16, the other end of the capacitor C16 is connected to a pin 5 of a level conversion chip U1, a pin 1 of the level conversion chip U1 is connected to one end of a capacitor C15, the other end of a capacitor C15 is connected to a pin 3 of a level conversion chip U1, a pin 2 of the level conversion chip U1 is connected to a capacitor C18, a capacitor C18 is connected to a capacitor C20, a capacitor C6867 is connected to ground, and a pin 368746 of the level conversion chip U19 is connected to one end of the capacitor, the other end of the capacitor C15 is grounded, and pins 13 and 14 of the level conversion chip U1 are connected with an external display screen.
7. The integrated controller of claim 6, wherein the 485 communication circuit comprises a bi-directional level shift chip U6, a bi-directional transient diode (D1, D2, D3), and a resistor R25, wherein one end of the bi-directional transient diode D1 is connected to a pin 13 of the bi-directional level shift chip U6, the other end of the bi-directional transient diode D1 is connected to a resistor R25, one end of the bi-directional transient diode D2 is connected to a pin 13 of the bi-directional level shift chip U6, the other end of the bi-directional transient diode D3 is connected to a pin 12 of the bi-directional level shift chip U6, and the other end of the bi-directional transient diode D36.
8. The integrated controller of claim 6, wherein the CAN communication comprises a level conversion chip U9 and an inductor (L5, L6), one end of the inductor L5 is connected to a pin 6 of the level conversion chip U9, and one end of the inductor L6 is connected to a pin 7 of the level conversion chip U9.
CN201911221241.8A 2019-12-03 2019-12-03 Integrated controller Pending CN111009904A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112462252A (en) * 2020-11-23 2021-03-09 帝森克罗德集团有限公司 Synchronous switch relay calibration platform and calibration method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112462252A (en) * 2020-11-23 2021-03-09 帝森克罗德集团有限公司 Synchronous switch relay calibration platform and calibration method

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