CN102738764B - Electronic controller for breaker - Google Patents
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- CN102738764B CN102738764B CN201210233926.6A CN201210233926A CN102738764B CN 102738764 B CN102738764 B CN 102738764B CN 201210233926 A CN201210233926 A CN 201210233926A CN 102738764 B CN102738764 B CN 102738764B
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Abstract
An electronic controller for a breaker comprises a sensor unit, a measuring and calculating unit, a processor unit, a tripping unit and a power unit, wherein the sensor unit is used for acquiring the electric information; the measuring and calculating unit is coupled with the sensor unit and used for measuring and calculating the electric parameter; the processor unit is coupled with the measuring and calculating unit; the tripping unit is coupled with the processor unit and used for controlling the breaker; the power unit is used for providing the working power for an electronic controller; the measuring and calculating unit services as an electric measuring and calculating chip, and is used for measuring and calculating the electric information transmitted by the sensor unit to obtain a digital electric parameter; the processor unit can read the measured and calculated electric parameter from the measuring and calculating unit, and then carries out the logical treatment and operates the tripping unit to realize the circuit protection. The measuring and calculating unit adopts the electric measuring and calculating chip for special data acquisition and calculation, thus improving the timeliness and precision of the measured electricity. The processor unit does not need to carry out the complex data calculation, thus improving the judgment speed of the circuit protection and reducing the development difficulty.
Description
Technical field
The present invention relates to low-voltage electrical apparatus field of power distribution, in particular, relate to a kind of electronic controller for breaker.
Background technology
Current Low Voltage Electrical Apparatus electronic controller experienced by three phases:
First stage: controller adopts and builds the circuit such as power supply, signal, execution as analogue devices such as resistance, electric capacity, diode, triode, operational amplifiers; controller, by processing the current signal of current transformer and comparing, realizes long delay and instantaneous two segment protect functions.First stage electronic controller quality is unstable, and protective value is bad, substantially no longer adopts at present.
Second stage: controller adopts with 8 or 16 single-chip microcomputers as core; the integrated circuits such as peripheral expansion A/D converter, eeprom memory, I/O interface chip, signal processing circuit, power circuit form control circuit; controller is by sampling and signal transacting to current transformer; single-chip microcomputer is input to through A/D conversion; single-chip microcomputer calculates the data after conversion and processes; long delay, short time delay, instantaneous, ground connection four segment protect function can be realized; electric current and time showing can also be realized with Time Controller; setting value sets, the functions such as data storage.Second stage electronic controller is present circuit breaker leading products, realize basic four segment protect functions, but function ratio is more single, can not realizes measurement and the protection of other parameters of electric power, can not meet the demand of intelligent grid power monitoring.
For the deficiency of above-mentioned electronic controller; current all big enterprises are all more at exploitation measurement parameter; as electrical energy parameters such as electric current, voltage, frequency, power, power factor (PF), harmonic waves; the controller of new generation of full selectivity protection can be realized, comprise the defencive functions such as long delay, short time delay, instantaneous, ground connection, regional interlock, load monitoring, electric leakage.Along with the increase of measurement parameter and the increase of controlling functions; cause that development difficulty is large, the construction cycle is long, development cost is high; and Software for Design is complicated, requires higher to the arithmetic speed of processor, existing new generation product certainty of measurement and protection precision cannot be ensured.
Summary of the invention
Technical problem to be solved by this invention be to provide a kind of protection more comprehensively and certainty of measurement and protection precision higher, electronic controller for breaker that development difficulty is low.
The object of the invention is to be achieved through the following technical solutions:
A kind of electronic controller for breaker, comprising:
For gathering the sensor unit of energy information; With the survey calculation unit of the survey calculation electrical energy parameter of sensor unit couples; With the processor unit of survey calculation element coupling; The trip unit for controlling breaker actuation be coupled with processor unit; For electronic controller provides the power subsystem of working power; Described survey calculation unit is electric energy computation chip, transmits energy information carry out survey calculation and draw digitized electrical energy parameter sensor unit; Described processor unit reads electrical energy parameter after survey calculation from survey calculation unit, manipulates the protection of described trip unit realizing circuit after carrying out logical process.
Preferably, described sensor unit comprises current acquisition module, voltage acquisition module, temperature sensor and leakage current transformer; Described survey calculation unit comprises computing module, the second analog/digital conversion module be coupled with computing module, and described current acquisition module and voltage acquisition module are coupled with described collection computing module by the second analog/digital conversion module; Described temperature sensor and leakage current transformer are coupled with the first analog/digital conversion module of processor unit.
Preferably, described sensor unit comprises current acquisition module, voltage acquisition module, temperature sensor and leakage current transformer; Described survey calculation unit comprises computing module, the the second analog/digital conversion module be coupled with computing module, described current acquisition module, voltage acquisition module, temperature sensor and leakage current transformer are coupled with described collection computing module by the second analog/digital conversion module.
Preferably, described survey calculation unit comprises current effective value computing module, voltage effective value computing module, frequency computation part module, active power calculates module, reactive power calculates module, apparent power calculates module, power factor calculates module, phase calculation module, phase sequence computing module, energy calculate module and harmonic wave computing module.Survey calculation unit is comprehensively analyzed gathering the information such as electric energy, temperature of coming up; and calculate design parameter for processor unit carry out analysiss judgement; significantly simplify the burden of processor unit, improve the decision-making capability of processor unit, improve certainty of measurement and protection precision further.
Preferably, described processor unit comprises four sections of overcurrent protection module, voltage protection module, frequency protection module, leakage protection module, regional interlock module, load monitoring module, phase sequence module, reverse power protection module and parameter setting module.
Preferably, described electronic controller for breaker also comprises the peripheral circuit unit for providing data storage, clock signal, PERCOM peripheral communication, signal I/O; For the human-machine interface unit of data display, state display, data input; The interface circuit couples of described peripheral circuit unit and human-machine interface unit and processor unit.
Preferably, described power subsystem comprises the power supply unit providing power supply, is connected carries out the power circuit unit that Power convert provides exportable different brackets DC power supply with power supply unit; Described power supply unit comprises the common of parallel connection provides the transformer of power supply and the saturated instrument transformer of three phase velocities to electronic controller; Described power supply unit comprises the rectification circuit, voltage stabilizing circuit, the DC-DC reduction voltage circuit that connect successively.
Preferably, described trip unit comprises the trip circuit unit and dropout performance element that are of coupled connections; Described trip circuit unit is subject to processing the manipulation of device unit and drives dropout performance element to carry out trip action to circuit breaker; Described trip circuit unit comprises the dropout drive circuit and break detection circuit that are coupled with processor unit, the MCR treatment circuit be coupled with current acquisition module; Dropout performance element comprises magnetic flow convertor and actuator, and magnetic flow convertor one end is with dropout driver module and the coupling of burn out detection module, and the other end is with actuator's coupling.
Preferably, described current acquisition module comprises hollow mutual inductor, and described survey calculation unit also comprises digital integrator, and described hollow mutual inductor is coupled with described second analog/digital conversion module by described digital integrator.
Preferably, described survey calculation unit is by SPI or I
2c bus is coupled with described processor unit.
The present invention adopts the framework of survey calculation unit and processor unit; survey calculation unit adopts electric energy computation chip sole duty to be responsible for collection and the calculating of data; perfect electrical energy parameter data are provided; processor unit carries out Logic judgment to the data that survey calculation unit provides; then drive trip circuit unit to make corresponding action, more fully selective protection is provided.Survey calculation unit is researched and developed by the manufacturer of specialty and is made, and the ageing and precision of electrical measurement is higher, also reduces the development difficulty of controller; And processor unit is without the need to carrying out complicated calculating to data, only carry out Logic judgment to data, improving decision-making judges speed, reduces development difficulty.
Accompanying drawing explanation
Fig. 1 is the principle schematic of the embodiment of the present invention one;
Fig. 2 is the principle schematic of the embodiment of the present invention two;
Fig. 3 is human-machine interface unit schematic diagram of the present invention;
Wherein: 100, processor unit; 110, the first analog/digital conversion module; 200, survey calculation unit; 210, the second analog/digital conversion module; 220, computing module; 300, sensor unit; 310, current acquisition module; 320, voltage acquisition module; 330, leakage current transformer; 340, temperature sensor; 400, power supply unit; 500, power circuit unit; 600, trip circuit unit; 700, dropout performance element; 800, human-machine interface unit; 900, peripheral circuit unit; 901, Liquid Crystal Module; 902, LED state indicating module; 903, input through keyboard module.
Embodiment
The invention provides a kind of circuit breaker, described circuit breaker comprises a kind of electronic controller for breaker, and this electronic controller for breaker comprises:
For gathering the sensor unit of energy information; With the survey calculation unit of the survey calculation electrical energy parameter of sensor unit couples; With the processor unit of survey calculation element coupling; The trip unit for controlling breaker actuation be coupled with processor unit; For electronic controller provides the power subsystem of working power;
Described survey calculation unit is electric energy computation chip, transmits energy information carry out survey calculation and draw digitized electrical energy parameter sensor unit; Described processor unit reads electrical energy parameter after survey calculation from survey calculation unit, manipulates the protection of described trip unit realizing circuit after carrying out logical process.
The present invention adopts the framework of survey calculation unit and processor unit; the sole duty of survey calculation unit adopts electric energy computation chip to be responsible for collection and the calculating of data; perfect electrical energy parameter data are provided; processor unit carries out Logic judgment to the data that survey calculation unit provides; then drive trip circuit unit to make corresponding action, more fully selective protection is provided.Survey calculation unit is researched and developed by the manufacturer of specialty and is made, and the ageing and precision of electrical measurement is higher, also reduces the development difficulty of controller; And processor unit is without the need to carrying out complicated calculating to data, only carry out Logic judgment to data, improving decision-making judges speed, reduces development difficulty.
Below in conjunction with accompanying drawing and preferred embodiment, the invention will be further described.
Embodiment one
As shown in Figure 1, described electronic controller for breaker comprises processor unit 100, survey calculation unit 200, sensor unit 300, power subsystem, trip unit, peripheral circuit unit 800, human-machine interface unit 900.Sensor unit 300 comprises the current acquisition module 310, the voltage acquisition module 320 that are coupled with survey calculation unit 200, and follows leakage current transformer 330 and the temperature sensor 340 of processor unit 100 coupling.Current acquisition module 310 selects hollow mutual inductor, and every phase circuit uses 1, and total total A/B/C/N tetra-, can detect circuit breaker main circuit A/B/C/N phase current; Voltage acquisition module 320 selects three-phase voltage transducer, can detect three-phase line voltage and phase voltage; Leakage current transformer 330 and temperature sensor 340 can detect main circuit leakage current, ambient temperature respectively.
Survey calculation unit 200 is electric energy computation chip, as three-phase electrical energy computation chip, single-phase electric energy computation chip or other electric energy computation chip customized.What the present embodiment was selected is three-phase electrical energy computation chip, the current acquisition module 310 corresponding when selecting single-phase electric energy computation chip and voltage acquisition module 320 also should be single-phase, should configure corresponding sensor unit 300 when selecting the electric energy computation chip of customization.The inner integrated digital integrator of described three-phase electrical energy computation chip, the second analog/digital conversion module 210, collection computing module 220, SPI/I
2c bus; Hollow mutual inductor is coupled with the second analog/digital conversion module 210 by digital integrator, and three-phase voltage transducer is directly coupled with the second analog/digital conversion module 210, and the second analog/digital conversion module 210 is coupled with collection computing module 220.The signal induced due to hollow transformer is differential signal, reduce so have to pass through digital integrator process, the current acquisition module 310 of present embodiment also can select iron core instrument transformer, so just can cancel digital integrator, is directly coupled with the second analog/digital conversion module 210.Present embodiment voltage acquisition module 320 also can directly by being coupled with the second analog/digital conversion module 210 after reduction voltage circuit step-down process.
Gather computing module 220 and select DSP data processor, its inside is integrated with current effective value computing module, voltage effective value computing module, frequency computation part module, active power calculates module, reactive power calculates module, apparent power calculates module, power factor calculates module, phase calculation module, phase sequence computing module, energy calculate module and harmonic wave computing module etc., full electrical energy parameter can be provided to measure, can by SPI or I after parameter measurement has calculated
2c bus real-time Transmission carries out logical operation to processor unit 100.Second analog/digital conversion module 210 can adopt 24 and above ADC transducer, and the measurement dynamic range of survey calculation unit 200 reaches 1000: 1, and certainty of measurement can reach 0.1%.Electrical energy parameter is stored in the register of survey calculation unit 200, and real-time update, processor unit 100 can pass through SPI or I
2c bus mode reads the various data of survey calculation unit 200 register appropriate address, reduces the operand of processor unit 100.
The present embodiment processor unit 100 selects single-chip microcomputer (MCU), can certainly select Digital Signal Processing (DSP).MCU is integrated with and is connected with the first analog/digital conversion module 110, and comprises I/0 interface, I
2c bus, UART interface are at interior interface circuit.The leakage current transformer 330 of sensor unit 300 and temperature sensor 340 are coupled with the first analog/digital conversion module 110 of MCU.
Described electronic controller for breaker also comprises the peripheral circuit unit 900 for providing data storage, clock signal, PERCOM peripheral communication, signal I/O; For the human-machine interface unit 800 of data display, state display, data input.Human-machine interface unit 800 comprises the I being coupled to processor unit 100
2the data storage of C bus and clock circuit, be coupled to the communicating circuit of UART interface, and be coupled to the input/output module of I/O interface.Data storage mainly provides the data such as the various parameters of electronic controller for breaker, fault data, monitoring record to store; Clock circuit provides real-time year, month, day, hour, min, number of seconds certificate; Communicating circuit is electronic controller for breaker and master system, the circuit realizing exchanges data between electronic controller and electronic controller, between electronic controller and other system; Input/output module can be the form of relay or optocoupler, there is provided the instruction outputs such as various warning, control and on off state input, the realization as overload-alarm, short-circuit alarming, load monitoring function, regional interlock function, duplicate supply translation function all needs input/output circuitry to realize.Peripheral circuit 900 comprises the Liquid Crystal Module 901 of the I/0 interface being coupled to processor unit 100, LED state indicating module 902, input through keyboard module 903 (see Fig. 3).User is arranged by input through keyboard module 903 pairs of various parameters of electronic controller for breaker; Electronic controller for breaker carries out information, data, the display of state and instruction by Liquid Crystal Module 901 and LED state indicating module 902, feeds back to user.
Described peripheral circuit can also comprise the pierce circuit, reference voltage circuit, the reset circuit that are connected with the interface circuit of processor unit 100; Pierce circuit determines processor unit 100 and survey calculation unit 200 speed of service; Reference voltage circuit is the benchmark of various signals collecting computing; Reset circuit be processor unit 100 and survey calculation unit 200 power on automatically reset and hand-reset time circuit.
Described survey calculation unit 200 is by SPI or I
2c bus is coupled with processor unit 100, by SPI or I
2c bus accepts the information about power from survey calculation unit 200; and from first analog/digital conversion module 110 read main circuit leakage current and ambient temperature information; through the logical process of the logical operation module such as four sections of overcurrent protection module of processor unit 100, voltage protection module, frequency protection module, leakage protection module, regional interlock module, load monitoring module, phase sequence module, reverse power protection module and parameter setting module, be handed down to the protection of trip unit realizing circuit by I/O interface.When the electrical quantity after processor unit 100 calculation process meets or exceeds protection setting threshold values; trip operation will be performed, as overload long delay protection, short delay protection, instantaneous protection, earth fault protection, making current dropout protection, current imbalance protection, neutral pole overcurrent protection, Voltage unbalance protection, overvoltage protection, under voltage protection, frequency (overfrequency, under-frequency) protection, phase sequence, reverse power protection by I/O interface notification trip unit.
Described trip unit comprises the trip circuit unit 600 and dropout performance element 700 that are of coupled connections; Described trip circuit unit 600 is subject to processing device unit 100 manipulation and drives dropout performance element 700 pairs of circuit breakers to carry out trip action; Described trip circuit unit 600 comprises the dropout driver module and burn out detection module that are coupled with processor unit 100, the MCR treatment circuit be coupled with current acquisition module 310, and MCR refers to that making current is threaded off and protects; Dropout performance element comprises magnetic flow convertor and actuator, and magnetic flow convertor one end is with dropout driver module and the coupling of burn out detection module, and the other end is with actuator's coupling.
Dropout driver module both can the operational order of answer processor unit 100, also can respond the operational order of MCR treatment circuit, then send operational order to magnetic flow convertor, and then drove actuator to perform concrete point/feed motion.MCR treatment circuit directly gathers the current information of current acquisition module, can respond serious current failure in time and cut off circuit breaker more quickly.Burn out detection module can allow processor unit 100 monitoring circuit situation, and decision-making is more reliable.
Described power subsystem comprises the power supply unit 400 providing power supply, is connected carries out the power circuit unit 500 that Power convert provides exportable different brackets DC power supply with power supply unit; Described power supply unit comprises provides the transformer of power supply and the saturated instrument transformer of three phase velocities to electronic controller jointly, transformer and the saturated instrument transformer of three phase velocities are parallel relationship, can directly adopt unidirectional diode in parallel, which side power supply which side voltage higher position adopt automatically; Described power supply unit comprises the rectification circuit, voltage stabilizing circuit, the DC-DC reduction voltage circuit that connect successively, AC power is converted to the DC power supply of different voltage, to adapt to the needs of various circuit to supply voltage, as+24V ,+5V ,-5V ,+3.3V etc., to meet the need for electricity of each module of controller, chip.Be connected with voltage stabilizing circuit after described transformer and the saturated instrument transformer of three phase velocities are connected with two rectification circuits respectively.
Embodiment two
As shown in Figure 2; present embodiment is with the difference of embodiment one; leakage current transformer 330 and the temperature sensor 340 of sensor unit 300 follow the second analog/digital conversion module 210 of survey calculation unit 200 to be coupled; data acquisitions all like this, calculating are all completed by survey calculation unit 200; further mitigate the computational burden of processor unit 100; be conducive to the speed of decision promoting processor unit 100, improve protection precision further.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (8)
1. an electronic controller for breaker, is characterized in that, comprising:
For gathering the sensor unit of energy information; With the survey calculation unit of the survey calculation electrical energy parameter of sensor unit couples; With the processor unit of survey calculation element coupling; The trip unit for controlling breaker actuation be coupled with processor unit; For electronic controller provides the power subsystem of working power;
Described survey calculation unit is electric energy computation chip, transmits energy information carry out survey calculation and draw digitized electrical energy parameter sensor unit; Described processor unit reads electrical energy parameter after survey calculation from survey calculation unit, manipulates the protection of described trip unit realizing circuit after carrying out logical process;
Described processor unit comprises four sections of overcurrent protection module, voltage protection module, frequency protection module, leakage protection module, regional interlock module, load monitoring module, phase sequence module, reverse power protection module and parameter setting module;
Described power subsystem comprises the power supply unit providing power supply, is connected carries out the power circuit unit that Power convert provides exportable different brackets DC power supply with power supply unit; Described power supply unit comprises the common of parallel connection provides the transformer of power supply and the saturated instrument transformer of three phase velocities to electronic controller; Described power supply unit comprises the rectification circuit, voltage stabilizing circuit, the DC-DC reduction voltage circuit that connect successively.
2. a kind of electronic controller for breaker as claimed in claim 1, is characterized in that, described sensor unit comprises current acquisition module, voltage acquisition module, temperature sensor and leakage current transformer; Described survey calculation unit comprises computing module, the second analog/digital conversion module be coupled with computing module, and described current acquisition module and voltage acquisition module are coupled with computing module by the second analog/digital conversion module; Described temperature sensor and leakage current transformer are coupled with the first analog/digital conversion module of processor unit.
3. a kind of electronic controller for breaker as claimed in claim 1, is characterized in that, described sensor unit comprises current acquisition module, voltage acquisition module, temperature sensor and leakage current transformer; Described survey calculation unit comprises computing module, the second analog/digital conversion module be coupled with computing module, and described current acquisition module, voltage acquisition module, temperature sensor and leakage current transformer are coupled with computing module by the second analog/digital conversion module.
4. a kind of electronic controller for breaker as claimed in claim 1, it is characterized in that, described survey calculation unit comprises current effective value computing module, voltage effective value computing module, frequency computation part module, active power calculates module, reactive power calculates module, apparent power calculates module, power factor calculates module, phase calculation module, phase sequence computing module, energy calculate module and harmonic wave computing module.
5. a kind of electronic controller for breaker as claimed in claim 1, is characterized in that, described electronic controller for breaker also comprises the peripheral circuit unit for providing data storage, clock signal, PERCOM peripheral communication, signal I/O; For the human-machine interface unit of data display, state display, data input; The interface circuit couples of described peripheral circuit unit and human-machine interface unit and processor unit; Described peripheral circuit unit comprises input/output module, and described input/output module is relay or optocoupler, can realize load monitoring function and regional interlock function.
6. a kind of electronic controller for breaker as claimed in claim 1, is characterized in that, described trip unit comprises the trip circuit unit and dropout performance element that are of coupled connections; Described trip circuit unit is subject to processing the manipulation of device unit and drives dropout performance element to carry out trip action to circuit breaker;
Described trip circuit unit comprises the dropout drive circuit and break detection circuit that are coupled with processor unit, the making current dropout conservation treatment circuit be coupled with current acquisition module; Dropout performance element comprises magnetic flow convertor and actuator, and magnetic flow convertor one end is with dropout driver module and the coupling of burn out detection module, and the other end is with actuator's coupling.
7. a kind of electronic controller for breaker as claimed in claim 2 or claim 3, it is characterized in that, described current acquisition module comprises hollow mutual inductor, described survey calculation unit also comprises digital integrator, and described hollow mutual inductor is coupled with described second analog/digital conversion module by described digital integrator.
8. a kind of electronic controller for breaker as described in as arbitrary in claim 1 ~ 6, is characterized in that, described survey calculation unit is by SPI or I
2c bus is coupled with described processor unit.
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| CN201210233926.6A CN102738764B (en) | 2012-07-06 | 2012-07-06 | Electronic controller for breaker |
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| CN201210233926.6A CN102738764B (en) | 2012-07-06 | 2012-07-06 | Electronic controller for breaker |
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| CN102738764B true CN102738764B (en) | 2014-12-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103744316B (en) * | 2014-01-17 | 2016-06-22 | 武钢集团昆明钢铁股份有限公司 | A kind of based on thermometric control system protection device and guard method |
| CN103901272A (en) * | 2014-04-20 | 2014-07-02 | 苏州蓝萃电子科技有限公司 | Digital frequency meter |
| CN107623313A (en) * | 2016-12-20 | 2018-01-23 | 合肥亚飞电力设备有限公司 | A kind of new supply line's relay protecting method based on microcomputer |
| TWI622239B (en) * | 2016-12-22 | 2018-04-21 | 國立高雄應用科技大學 | Power switch |
| CN106953292A (en) * | 2017-05-02 | 2017-07-14 | 北京航天发射技术研究所 | A kind of intelligent contactor with marine environment adaptability |
| CN111834975A (en) * | 2020-06-30 | 2020-10-27 | 国网上海市电力公司 | Voltage data storage method for overvoltage or undervoltage open-circuit open-phase protector |
| CN112886712A (en) * | 2021-03-18 | 2021-06-01 | 桂林航天电子有限公司 | Shipborne electronic circuit breaker module and shipborne intelligent power distribution system |
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Application publication date: 20121017 Assignee: NOARK ELECTRICS (SHANGHAI) Co.,Ltd. Assignor: Zhejiang Chint Electrics Co.,Ltd. Contract record no.: X2020330000031 Denomination of invention: Electronic controller for breaker Granted publication date: 20141217 License type: Common License Record date: 20200509 |
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Application publication date: 20121017 Assignee: Wenzhou Zhengtai Electrical Technology Co., Ltd Assignor: Zhejiang Chint Electrics Co.,Ltd. Contract record no.: X2020330000078 Denomination of invention: An electronic controller of circuit breaker Granted publication date: 20141217 License type: Common License Record date: 20201021 |
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