CN208445349U - A kind of power distribution network synthesis distribution terminal - Google Patents
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Abstract
The utility model relates to a kind of power distribution network synthesis distribution terminals, comprising: feeder line acquisition control unit, synchronized phasor acquisition unit, electric energy quality monitoring unit, Ethernet exchanging unit, Data Centralized Processing unit and clock synchronization unit；Clock synchronization unit is respectively connected with Data Centralized Processing unit, feeder line acquisition control unit, synchronized phasor acquisition unit, electric energy quality monitoring unit to set time；Ethernet exchanging unit is connected with Data Centralized Processing unit by Ethernet interface；Feeder line acquisition control unit, synchronized phasor acquisition unit, electric energy quality monitoring unit are connected to carry out ethernet communication with Ethernet exchanging unit；Feeder line acquisition control unit, electric energy quality monitoring unit pass through SPI interface and are connected with synchronized phasor acquisition unit to carry out SPI communication.The utility model can be realized the synchronous acquisition to each node data of power distribution network, realize the supervisory control and data acquisition (SCADA) of Distribution Network Equipment, and carry out power quality on-line monitoring.
Description
Technical Field
The utility model relates to a distribution network automation field, in particular to distribution terminal is synthesized to distribution network.
Background
The distribution network automation terminal is a basic link for realizing distribution automation, and generally refers to a Feeder Terminal Unit (FTU) for monitoring a distribution network, a distribution transformer distribution terminal (TTU), a switching station and a looped network cabinet remote monitoring terminal (DTU). The main functions of the system are to realize the monitoring and data acquisition of the power distribution network equipment, and the system has the functions of remote signaling, remote measurement, remote control, fault current detection, communication forwarding and fault diagnosis, isolation, positioning and recovery. Although distribution network automation terminals have begun to play an important role in smart distribution networks at present, there are still many problems that need to be solved urgently.
Particularly, the traditional distribution automation (remote) terminal has the problems of excessive data delay, insufficient boundary measurement, inaccurate element parameters and the like, so that the state estimation accuracy and the real-time performance of the distribution network have great challenges. Meanwhile, the traditional distribution automation remote terminal can only provide stable and asynchronous power grid time period data, so that an upper-layer substation or a central main station cannot timely master dynamic information of the system and take measures. In addition, the conventional distribution automation remote terminal has limited measurement data precision and non-uniform time scale, can only obtain the state of the power system by solving a nonlinear equation set by using a large amount of redundant measurement data, has long calculation time and poor real-time performance, and cannot be applied to analysis of a transient process. In addition, traditional distribution network automation terminal can't realize the power quality monitoring function.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome prior art's is not enough, provides a distribution network comprehensive distribution terminal of high accuracy time synchronization, can realize the synchronous acquisition to each node data of distribution network to obtain the accurate state of the instantaneous section of full network, realize distribution network equipment's control and data acquisition, and carry out electric energy quality on-line monitoring.
The utility model provides a technical scheme that its technical problem adopted is:
an integrated power distribution terminal for a power distribution network, comprising: the comprehensive measurement and control module and the communication management module; the comprehensive measurement and control module comprises a feeder line acquisition control unit, a synchronous phasor acquisition unit and an electric energy quality monitoring unit; the communication management module comprises a data centralized processing unit; the comprehensive measurement and control module also comprises an Ethernet switching unit; the communication management module further comprises a clock synchronization unit; the clock synchronization unit is respectively connected with the data centralized processing unit, the feeder line acquisition control unit, the synchronous phasor acquisition unit and the power quality monitoring unit so as to carry out time synchronization; the Ethernet switching unit is connected with the data centralized processing unit through an Ethernet port; the feeder line acquisition control unit, the synchronous phasor acquisition unit and the power quality monitoring unit are all connected with the Ethernet switching unit to carry out Ethernet communication; the feeder line acquisition control unit and the electric energy quality monitoring unit are connected with the synchronous phasor acquisition unit through SPI interfaces to carry out SPI communication.
Preferably, the power distribution network comprehensive power distribution terminal further comprises an a/D conversion chip; and the synchronous phasor acquisition unit is connected with the A/D conversion chip to acquire alternating current analog quantity.
Preferably, the clock synchronization unit performs time synchronization based on a GPS, Beidou, IEEE1588 and/or IRIG-B clock.
Preferably, the clock synchronization unit is connected to the data centralized processing unit, the feeder line acquisition control unit FTU, the synchronous phasor acquisition unit PMU, and the power quality monitoring unit PQ through one path of serial interface and one path of second pulse interface, respectively.
Preferably, magnetic coupling isolators admm 1200 are arranged between the clock synchronization unit and the data centralized processing unit, between the clock synchronization unit and the feeder line acquisition control unit FTU, between the clock synchronization unit and the synchronous phasor acquisition unit PMU, and between the clock synchronization unit and the power quality monitoring unit PQ.
Preferably, the feeder line acquisition control unit and the power quality monitoring unit are both connected with the ethernet switching unit through ethernet ports.
Preferably, the synchronous phasor acquisition unit is connected with the ethernet switching unit through a network interface chip with an SPI interface to network interface function.
Preferably, the feeder line acquisition control unit adopts a CPU with a model number of STM32F 407.
Preferably, the synchronous phasor acquisition unit, the power quality monitoring unit and the clock synchronization unit all adopt a CPU of which the model is STM32F 427.
Preferably, the data centralized processing unit adopts a core board with the model number of AM-335X.
The utility model discloses following beneficial effect has:
(1) the utility model has the functions of traditional FTU and DTU, can realize the monitoring and data acquisition of the power distribution network equipment, and has the functions of remote signaling, remote measuring, remote control, fault current detection, communication forwarding, fault diagnosis, isolation, positioning, recovery and the like; meanwhile, the system has the function of monitoring the quality of electric energy on line, and has the functions of synchronously monitoring and storing voltage sag and short-time voltage interruption;
(2) the traditional distribution network automation terminal often adopts a simple network time protocol SNTP, the highest synchronization precision which can be reached is only in millisecond level, and the requirement of an active distribution network on the real-time information time synchronization precision such as sampling values and the like cannot be met, and the utility model discloses a high-precision clock synchronization function based on GPS/Beidou/IEEE 1588/IRIG-B is added, so that the synchronization precision reaches sub-microsecond level;
(3) the utility model realizes the synchronous acquisition of the data of each node of the power distribution network by a high-precision clock synchronous sampling technology, and monitors the basic parameters of the key nodes in the power distribution network, such as voltage, current, frequency, phasor and the like; the node data measured by each node has a consistent time standard, and the data obtained by different site measurement and calculation is added with a corresponding time scale and angle and is transmitted to a control center through a communication network, so that the accurate state of the whole network instantaneous profile is obtained, and data support is provided for the power distribution network safety closed-loop control;
(4) the utility model has the advantages that the voltage and current synchronous measurement precision reaches 0.2 level, the measurement error is less than 0.2% (0.5 level of the traditional distribution automation remote terminal), the voltage sag and short-time voltage interruption synchronous monitoring and storage functions are realized, and the whole network synchronous monitoring of the voltage sag and short-time voltage interruption of the distribution network is supported;
(5) the utility model discloses a 256 sampling data of every cycle, 64 sampling points of remote terminal of more traditional distribution automation have higher sampling precision.
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In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is an overall structure diagram of a power distribution network integrated power distribution terminal according to an embodiment of the present invention;
fig. 2 is a schematic block diagram of an integrated measurement and control module according to an embodiment of the present invention;
fig. 3 is a schematic block diagram of a clock synchronization unit according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, the utility model discloses distribution terminal is synthesized to distribution network of embodiment includes: the comprehensive measurement and control module 10 and the communication management module 20; the comprehensive measurement and control module 10 comprises a feeder line acquisition control unit 101, a synchronous phasor acquisition unit 102 and a power quality monitoring unit 103; the communication management module comprises a data centralized processing unit 201; the integrated measurement and control module 10 further includes an ethernet switching unit 104; the communication management module further comprises a clock synchronization unit 202; the clock synchronization unit 202 is connected with the data centralized processing unit 201, the feeder line acquisition control unit 101, the synchronous phasor acquisition unit 102 and the power quality monitoring unit 103 respectively for time synchronization; the ethernet switching unit 104 is connected to the data centralized processing unit 201 through an ethernet port; the feeder line acquisition control unit 101, the synchronous phasor acquisition unit 102 and the power quality monitoring unit 103 are all connected with the ethernet switching unit 104 for ethernet communication; the feeder line acquisition control unit 101 and the power quality monitoring unit 103 are connected with the synchronous phasor acquisition unit 102 through an SPI (serial peripheral interface) to carry out SPI communication; the data central processing unit communicates to dispatch center 30 via an ethernet port using the 104 protocol.
Specifically, the integrated measurement and control module 10 can be implemented by using three circuit boards, including: the integrated measurement and control board, the clock board and the bottom board.
Referring to fig. 2, the integrated measurement and control board includes three functional units, namely a feeder line acquisition control unit 101, a synchronous phasor acquisition unit 102 and a power quality monitoring unit 103, each functional unit has an independent CPU, and further includes an ethernet switching unit 104 chip to complete communication between the three functional units and a data centralized processing unit 201.
In this embodiment, the feeder line acquisition control unit 101, the synchrophasor acquisition unit 102, and the power quality monitoring unit 103 each use one RS485 interface and one second pulse interface (a timer capture pin), and revise the date, hour, minute, second, and second with an RS485 message, and calibrate a clock of millisecond or less. The RS485 and second pulses are magnetically coupled and isolated by ADUM 1200. Specifically, the feeder line acquisition control unit 101, the synchronous phasor acquisition unit 102, and the power quality monitoring unit 103 receive the time synchronization information message sent by the clock synchronization unit 202 through the RS485 interface, and receive the second pulse time synchronization sent by the clock synchronization unit 202 through the second pulse interface, so as to ensure clock synchronization.
In this embodiment, the feeder line acquisition control unit 101 employs a CPU of which the model is STM32F 407. The feeder line acquisition control unit 101 provides a path of SPI interface to complete communication with the synchronous phasor acquisition unit 102; the original AD7606 acquisition of the sampling point is changed into the acquisition of the sampling point by the synchronous phasor acquisition unit 102 and then the sampling point is transmitted through the SPI, and the processing process after the sampling point is received by the feeder line acquisition control unit 101 is consistent with that of the existing FTU. In addition, the feeder line acquisition control unit 101 further provides an ethernet interface, and is connected to the ethernet switching chip through the ethernet interface to complete ethernet communication with other units.
In this embodiment, the CPU of the synchrophasor acquisition unit 102 selects an STM32F427 with 144 pins, which can satisfy 5 SPI interfaces. The allocation of 5 SPI ports is as follows: SPI1 in communication with feeder collection control unit 101; communicating with power quality monitoring unit 103-SPI 2; communicating with W5100 (ethernet-extended) -SPI 3; and two pieces of AD7606 are communicated with-SPI 4\ SPI 5. In addition, the synchrophasor acquisition unit 102 reserves a high-speed network interface, uses the CPU network port to connect with the PHY chip, completes the SMV function, and uses the SMV and GOOSE protocols to realize data transmission to the scheduling center 30, and uses 256 points/cycle. Further, the synchronous phasor acquisition unit 102 communicates with the ethernet switching unit 104 (ethernet switch chip) through an external expansion port (W5100 chip). The two AD7606 pieces are connected with sampling signals of the AC board, one AD7606 piece is provided with 8 sampling channels, 8 alternating current analog quantities (Ua, Ub, Uc, Ia, Ib, Ic, UO and Io) of one line can be collected, and the other AD7606 piece can be used for standby.
In this embodiment, the CPU of the power quality monitoring unit 103 selects an STM32F427 with 144 pins. The power quality monitoring unit 103 provides a single SPI interface to complete communication with the synchronous phasor acquisition unit 102. In addition, the power quality monitoring unit 103 further provides an ethernet interface, and is connected to the ethernet switch chip through the ethernet interface to complete ethernet communication with other units.
As described above, the ethernet switching unit 104 (ethernet switching chip) communicates with the feeder line acquisition control unit 101, the synchronous phasor acquisition unit 102 and the power quality monitoring unit 103, and communicates in a capacitive coupling manner without using a network transformer, and two network ports of the switch chip communicate with the outside.
In this embodiment, the analog input includes three-phase voltages Ua, Ub, Uc, three-phase currents Ia, Ib, Ic, zero-sequence voltage Uo, zero-sequence current Io, and the analog input collection adopts a 16-bit a/D conversion chip AD7606, and the sampling process is completed by a processor of the synchronous phasor collection unit 102, and the sampling rate is 256 points per cycle.
In this embodiment, the number of remote signaling output amounts is 20, and the remote signaling output amounts are accessed to the processor of the feeder line acquisition control unit 101, where the remote signaling resolution ratio: the remote signaling common end power supply is adaptive to 24V/48V within less than or equal to 2 milliseconds, the jitter removal time of remote signaling can be set, and the setting range is 10-1000 milliseconds. The output quantity of the remote control is 8, the processor of the feeder line acquisition control unit 101 is accessed, the output of the relay is a normally open contact, and the output capacity is direct current 110V 5A or 220V 5A. The ambient temperature and the dc acquisition are also performed by the feeder acquisition control unit 101.
Specifically, the data collection and calculation method of the data amount is as follows:
1) the amplitude values and effective values of voltage and current are analyzed and calculated by adopting an FFT (fast Fourier transform) algorithm, and harmonic waves, voltage sag, short-time interruption and the like are calculated, so that the on-line monitoring of the power quality is realized;
2) the synchronous phasor measurement is realized by utilizing a high-precision GPS/Beidou satellite synchronous clock and IEE1588 or B code time setting, and is transmitted to a control center of a power grid through a communication system for realizing whole-network operation monitoring control or realizing regional protection and control;
3) the basic algorithm for synchronous phasor measurement is Discrete Fourier Transform (DFT), i.e. DFT of a sample sequence of an input signal is performed to find the phasor. The input signal sampling sequence is set as follows:
xk＝Xmcos(ωt+φ)
wherein, XmIs the signal amplitude and phi is the signal phase angle.
The DFT transform formula is:
wherein,the phasor is obtained.
In summary, the CPU of the synchrophasor acquisition unit 102 is responsible for analog acquisition, and the sampling data is transmitted to the feeder acquisition control unit 101 and the power quality monitoring unit 103 through the high-speed SPI bus. The feeder line acquisition control unit 101 acquires remote signaling, remote control and other inputs, and relevant signals are sent to the synchrophasor acquisition unit 102 and the power quality monitoring unit 103 through the SPI bus. The ethernet switching chip adopts a 5-port ethernet switching chip, and the feeder line acquisition control unit 101, the synchronous phasor acquisition unit 102 and the power quality monitoring unit 103 are respectively designed with an ethernet port, and exchange data with the communication management module through ethernet. The other ethernet port of the synchrophasor acquisition unit 102 is designed for SMV and GOOSE message transmission of the 61850 standard.
Referring to fig. 3, a schematic block diagram of the clock synchronization unit 202 is shown, a processor of the clock synchronization unit 202 selects an STM32F247, and a supportable clock source of the chip includes GPS, beidou, IEEE1588, and IRIG-B.
Specifically, the time keeping unit of the clock synchronization unit 202 uses a constant temperature crystal oscillator, and when the external clock source is turned off, the clock is kept by the constant temperature crystal oscillator. When the power supply disappears, the power supply is held by a lithium battery or a super capacitor.
Further, the clock synchronization unit 202 adopts a serial port message plus a pulse per second in a time synchronization manner, which specifically includes: and the RS485 message is adopted to revise date, time, minute, second and second, and the pulse is used for calibrating the clock with the time of millisecond or less. The serial port sending part and the output of the second pulse are both isolated by magnetic coupling ADUM1200 (same-direction double-channel). Considering that each output of the RS485 does not influence each other, the RS485 circuit of each path uses a separate coupling 485 chip.
In this embodiment, the data centralized processing unit 201 has 6 ethernet ports and 1 RS232/485 communication port. One of the ethernet ports communicates with the schedule in the 104 protocol pair, the other 5 ethernet ports can be connected to 5 integrated measurement and control modules 10, and the RS232/485 communication port thereof is used for receiving the time-setting command of the clock synchronization unit 202.
The data centralized processing unit 201 mainly considers factors such as severe environment for operating the device, performance requirements, and the like in terms of hardware platform selection. In the embodiment, an AM335X is adopted as a core board, wherein a central processing unit is a high-performance CPU with ARM32 bit main frequency up to 1 GHz; has 512MB DDR3RAM and 1GB Nand Flash; the SD card slot is provided with an expandable SD card slot, and the overall performance is very strong. And the core board has strong electromagnetic compatibility, environmental temperature and humidity adaptability and stability, and can adapt to various severe environments in which the project operates.
The core board adopts an embedded linux system. The embedded Linux is an operating system which can be operated on an embedded computer by cutting and modifying a Linux operating system, has excellent performance and is suitable for various CPUs and various hardware platforms; the structure of the inner core is very complete in the aspect of network, the most common protocols such as UDP, TCP/IP and the like in the network are supported, and the support of Ethernet including ten megabytes, hundred megabytes and gigabytes, wireless network, token ring network, optical fiber and even satellite is also provided; the system is also an open source system, software is easy to transplant, codes are open, and the system is supported by a plurality of application software, so that the development cycle of application products is short. In addition, the kernel board adds and subtracts functions of program remote download, program remote start, sampling value data api (so), event information api (so), and switching value output api (so).
In this embodiment, an 8-channel 16-bit synchronous sampling a/D chip AD7606 is used for a/D conversion, and the chip is capable of truly supporting bipolar analog sampling, and has an analog input clamping protection function, an oversampling holding function and a digital filtering function, and thus, the reliability and accuracy of sampling are ensured. And data exchange between the A/D chip AD7606 and the CPU samples the high-speed SPI bus.
In this embodiment, magnetic isolation is added to data transmission between the a/D chip and the CPU processor. The remote signaling input and the remote control output both adopt a photoelectric isolation mode, and the remote control output is provided with hardware protection. The relays all adopt double-pole synchronous relays to support hardware action to return nodes, and output reliability is guaranteed. The adopted key devices such as electrolytic capacitors, thermistors, piezoresistors, chip capacitors, chip resistors, crystal oscillators, network chips, storage chips, optical couplers, relays, DC/DC isolation power supplies and the like are all high-reliability industrial products.
In this embodiment, the feeder collection control unit is used for realizing the function of a Feeder Terminal Unit (FTU), the synchrophasor collection unit is used for realizing the function of a synchrophasor measurement unit (PMU), and the power quality monitoring unit is used for realizing the function of a power quality monitoring device (PQ).
Specifically, the functions of the feeder line acquisition control unit specifically include:
a) a measurement function comprising:
measuring three-phase voltages (Va, Vb, Vc, Uab, Ubc, Uac) and zero-sequence voltage (Vx); measuring three-phase currents (zero-sequence currents) Ia, Ib (I0) and Ic; measuring the frequency; and calculating average current, active power, reactive power, power factors, apparent power, phase angle, harmonic waves and the like.
b) Local/remote display functions, including:
displaying the on/off position of the switch; remote/local status display; a grounded "latched" state display; displaying the ground fault; displaying phase faults; displaying the AC power loss; displaying the battery under-voltage; displaying the activation of the battery; displaying the fault of the battery management module; DC12V operational power failure display; DC48V controls power failure display;
c) an event logging function comprising: an SOE event record; remote control event recording; telemetry of periodic event records; and (5) running log records by the system.
The functions of the synchronous phasor acquisition unit specifically include:
a) synchronism: the precise synchronous clock signal (such as GPS) is used as the reference of the sampling process, so that the phasors of all remote nodes have a definite uniform phase relation. The phasor measurement can utilize the sampling pulse of a pulse per second signal synchronization device of a synchronous clock, and the synchronization error of the sampling pulse is not more than +/-1 mu s;
b) real-time performance: under the support of a high-speed communication system, various data can be transmitted to a plurality of main stations in real time, and corresponding commands of the main stations are received;
c) high speed: the system has a high-speed internal data bus and an external communication interface, and meets the requirements of measurement, storage and external transmission of a large amount of real-time data;
d) high precision: the device has high enough measurement precision, 16 bits are selected for A/D, signal phase shift generated in the measurement link of the device needs to be compensated, and the measurement precision of the device comprises the precision of amplitude and phase angle;
e) selecting a voltage current transformer with angular difference meeting the requirement of less than 0.1 degree and high precision, and designing a hardware loop to fully consider the influence brought by phase shift;
f) measuring and displaying three-phase fundamental wave voltage phasor, three-phase fundamental wave current phasor, fundamental wave positive sequence voltage phasor, fundamental wave positive sequence current phasor, active power, reactive power, system frequency and switch state in real time;
g) synchronous clock signals and PPS pulse signals from other devices can be received;
h) the communication protocol with the master station conforms to GB/T26865.2-2011 part 2 of a real-time dynamic monitoring system of a power system: the regulatory requirements of the data transmission protocol ";
i) a dynamic data recording function;
j) fault recording: storing 10 groups of recording information, wherein 1S before fault and 2S after fault, data are sampled and stored according to 128 points per cycle, and the memory required by data of 3 seconds is as follows: the memory required by each group of wave recording data is as follows: 128 × 8 × 2 (3000/20) ═ 3072000 bytes, that is, 3 megabytes of memory are required, and 10 sets of recording data are 30 megabytes of memory.
And (3) recording faults: the communication requirements conform to the output data model specification of COMTRADE. See appendix B of DL/T553-2013 Power System dynamic recording device general technical Condition.
k) Data storage: the implementation is realized by using 32GTF cards.
The utility model relates to a distribution network is synthesized distribution terminal has higher sampling rate, and after the distributing type deployment, each acquisition unit time synchronization, carry out distributed electric energy quality analysis to the collection node through each acquisition unit, to voltage sag, voltage fluctuation and flicker, the amplitude of higher harmonic, frequency jitter etc. calculate in real time, fault location for the distribution network, electric energy quality optimization, the harmonic is administered and is provided abundant data, reliability and the self-healing nature for large-scale distribution network provide original accurate data, for the distribution network reliable, the self-healing, can handle and provide the precondition, can satisfy future initiative distribution network development to terminal equipment's technical requirement.
The utility model relates to a distribution network is synthesized distribution terminal can be after the trouble disturbance real-time supervision, record dynamic data, can predict the stability of distribution network to provide corresponding control strategy, control strategy is not enough when preventing that proruption trouble from producing. When the power distribution network is predicted to lose transient stability, emergency measures can be taken for the power distribution network according to a preset scheme, and system breakdown is prevented.
The utility model relates to a distribution network is synthesized distribution terminal can obtain system's high accuracy real-time data for state estimation turns into linear estimation algorithm from large-scale nonlinear calculation problem, not only improves state estimation's precision greatly, can shorten the calculating time in a large number moreover, more is favorable to real-time analysis to calculate and transient state process control.
The present invention has been explained by using specific embodiments, and the explanation of the above embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (10)
1. An integrated power distribution terminal for a power distribution network, comprising: the comprehensive measurement and control module and the communication management module; the comprehensive measurement and control module comprises a feeder line acquisition control unit, a synchronous phasor acquisition unit and an electric energy quality monitoring unit; the communication management module comprises a data centralized processing unit; the integrated measurement and control module is characterized by also comprising an Ethernet switching unit; the communication management module further comprises a clock synchronization unit; the clock synchronization unit is respectively connected with the data centralized processing unit, the feeder line acquisition control unit, the synchronous phasor acquisition unit and the power quality monitoring unit so as to carry out time synchronization; the Ethernet switching unit is connected with the data centralized processing unit through an Ethernet port; the feeder line acquisition control unit, the synchronous phasor acquisition unit and the power quality monitoring unit are all connected with the Ethernet switching unit to carry out Ethernet communication; the feeder line acquisition control unit and the electric energy quality monitoring unit are connected with the synchronous phasor acquisition unit through SPI interfaces to carry out SPI communication.
2. The power distribution network integrated power distribution terminal of claim 1, further comprising an a/D conversion chip; and the synchronous phasor acquisition unit is connected with the A/D conversion chip to acquire alternating current analog quantity.
3. The power distribution network integrated power distribution terminal of claim 1, wherein the clock synchronization unit is configured to time based on GPS, beidou, IEEE1588, and/or IRIG-B clocks.
4. The power distribution network integrated power distribution terminal according to claim 1, wherein the clock synchronization unit is connected to the data centralized processing unit, the feeder line acquisition control unit FTU, the synchronous phasor acquisition unit PMU, and the power quality monitoring unit PQ through a serial interface and a second pulse interface, respectively.
5. The power distribution network integrated power distribution terminal according to claim 4, wherein magnetic coupling isolators are arranged between the clock synchronization unit and the data centralized processing unit, the feeder line acquisition control unit FTU, the synchronous phasor acquisition unit PMU and the power quality monitoring unit PQ.
6. The integrated power distribution terminal of the power distribution network according to claim 1, wherein the feeder acquisition control unit and the power quality monitoring unit are both connected to the ethernet switching unit through ethernet ports.
7. The integrated power distribution terminal of the power distribution network according to claim 1, wherein the synchronous phasor acquisition unit is connected to the ethernet switching unit through a network interface chip having a function of converting an SPI interface to a network interface.
8. The power distribution network integrated power distribution terminal according to claim 1, wherein the feeder line acquisition control unit adopts a CPU of model STM32F 407.
9. The power distribution network integrated power distribution terminal according to claim 1, wherein the synchronous phasor acquisition unit, the power quality monitoring unit and the clock synchronization unit all adopt a CPU of which the model is STM32F 427.
10. The integrated power distribution network distribution terminal of claim 1, wherein the data centralized processing unit is a core board with a model number of AM-335X.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108336826A (en) * | 2018-04-09 | 2018-07-27 | 厦门远通电子技术有限公司 | A kind of power distribution network synthesis distribution terminal |
| CN110008285A (en) * | 2019-03-26 | 2019-07-12 | 国网上海市电力公司 | Intelligent distribution network information integrated system and method containing miniature synchronous phasor measurement |
| CN110112698A (en) * | 2019-05-27 | 2019-08-09 | 江苏圣通电力新能源科技有限公司 | A kind of new distribution type DTU |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108336826A (en) * | 2018-04-09 | 2018-07-27 | 厦门远通电子技术有限公司 | A kind of power distribution network synthesis distribution terminal |
| CN110008285A (en) * | 2019-03-26 | 2019-07-12 | 国网上海市电力公司 | Intelligent distribution network information integrated system and method containing miniature synchronous phasor measurement |
| CN110008285B (en) * | 2019-03-26 | 2024-01-26 | 国网上海市电力公司 | Intelligent power distribution network information integration system and method containing miniature synchronous phasor measurement |
| CN110112698A (en) * | 2019-05-27 | 2019-08-09 | 江苏圣通电力新能源科技有限公司 | A kind of new distribution type DTU |
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