CN202634084U - Intelligent low-voltage power load distribution terminal - Google Patents
Intelligent low-voltage power load distribution terminal Download PDFInfo
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- CN202634084U CN202634084U CN 201220329536 CN201220329536U CN202634084U CN 202634084 U CN202634084 U CN 202634084U CN 201220329536 CN201220329536 CN 201220329536 CN 201220329536 U CN201220329536 U CN 201220329536U CN 202634084 U CN202634084 U CN 202634084U
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- 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
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
Abstract
The utility model relates to an intelligent low-voltage power load distribution terminal. The terminal comprises a high-current transformer, a voltage transformer, high-power magnetic latching relays, a high-current combination switch circuit, a three-phase switch interlock circuit, a communication module, a phase discrimination circuit and a CPU (central processing unit). The secondary windings of the high-current transformer and the voltage transformer are connected with the three-phase switch interlock circuit; the three-phase switch interlock circuit is connected with the high-power magnetic latching relays and combination switches; and the CPU is respectively connected with the communication module, the phase discrimination circuit and the three-phase switch interlock circuit. The intelligent low-voltage power load distribution terminal can be connected with a host through the communication module to transmit the electricity consumption and other information of the terminal to the host, and can receive the instructions of the host, phase discrimination can be carried out on terminal load, load can be automatically and rapidly distributed and switched, part of load can be shifted from one phase to another phase, consequently, three-phase load can be kept in balance, and three-phase current can achieve a needed degree of balance. The intelligent low-voltage power load distribution terminal is suitable for intelligently distributing the low-voltage power load of a distribution transformer.
Description
Technical field
The utility model relates to a kind of low-voltage power sharing of load terminal, belongs to electric power electric power system distribution power-saving technique field.
Background technology
Low-voltage power load, typically refer to exchange the 380V system with load, account for the overwhelming majority of China's electric load consumption.Exchange the 380V system and form by three-phase and four-line usually, i.e. A phase, B phase, C phase, N phase (zero line), the load of its tape splicing has almost comprised all kinds and factory's electricity consumption, the agricultural irrigation of modern household electrical appliances.
For the three phase electric machine load, when normally moving, three-phase is in poised state.Concerning residential electricity consumption, its load nearly all is single-phase.Because resident's load is normally drawn from transformer with cable, when the installer installs, be difficult to know get into the separate of resident, more do not know the character and the size of which family's load.In other words, even know the size of certain family's load, but, also promptly be very easy to cause three-phase load uneven because the seasonality of electricity consumption and period all can cause the payload of certain phase unpredictable.We can say that low-voltage power system three-phase load absolute equilibrium is a perfect condition, imbalance is a normality.
Three-phase load is uneven, and the harm that brings to electric power system is very serious.First harm is that the three-phase load imbalance causes line loss to increase, and the numerical value that line loss increases becomes with electric current square to be directly proportional.In poised state, circuit Sun Hao ⊿ P=I
2R ， Qie ⊿ P
A=⊿ P
B=⊿ P
C, the total line loss ∑ of three-phase ⊿ P=3 I
2R; When system is in non-equilibrium state, suppose that the A phase load is zero, the electric current ， Ze ⊿ P of A phase has been shared in B, C two phase averages
A=0 ， ⊿ P
B=(1.5I)
2R=2.25I
2R ， ⊿ P
C=(1.5I)
2R=2.25I
2R ， ∑ ⊿ P=4.5 I
2R, line loss has increased by 50%.Be not difficult to calculate, if the load of three-phase is by a phase tape splicing, the ∑ ⊿ P=(3I) of this moment
2R=9I
2R, when line loss is poised state 3 of line loss times.
Three-phase load is uneven, and the second largest harm that brings to electric power system is that transformer produces additional iron losses.The distribution transformer of the Y/Yo wiring three core limb structures that adopt more; When the three-phase load imbalance taking place or earth fault occurs, its primary side non-zero-sequence current exists, and secondary side has zero-sequence current to exist; Therefore the zero-sequence current of secondary side is exciting current fully; The zero sequence magnetic flux that produces can not be closed in iron core, need through the oil tank wall closure, thereby heating produces iron loss in annexes such as iron case.
Three-phase load is uneven, and the third-largest harm that brings to electric power system is to produce additional copper loss, and additional copper loss increase can cause the transformer heating, reduces the operational efficiency of transformer.
Three-phase load is uneven, and the fourth-largest harm that brings to electric power system is to produce variation.
Therefore; Invent a kind of electric load intelligent dispensing system is necessary very much; It gathers each electric load smart allocation terminal, i.e. load of extension set of native system subordinate with real-time monitoring system three-phase load state; Making a strategic decision, how next step redistributes load, makes three-phase load remain essentially in poised state at any time.It is not only a kind of product that improves transformer operational efficiency and life-span, a kind of especially energy-conserving product.
Summary of the invention
The purpose of the utility model is; In order to solve the imbalance problem that the low-voltage power load exists, can realize dynamically adjusting the size of each phase load, make system remain at state in a basic balance; Improve the transformer operational efficiency; Reduce line loss, the present invention proposes and discloses a kind of low-voltage power load intelligent dispensing system electric load smart allocation terminal, i.e. extension set.
The technical scheme of the utility model is that the utility model low-voltage power load smart allocation terminal is made up of great current mutual inductor (CT), voltage transformer (PT), power magnetic force keeping relay, big electric current composite switch circuit, threephase switch interlock circuit, communication module, phase identification of circuit, CPU.The secondary winding of great current mutual inductor (CT) and voltage transformer (PT) connects the threephase switch interlock circuit; The threephase switch interlock circuit connects power magnetic force keeping relay and combination switch; CPU links to each other with communication module, phase identification of circuit, three-phase interlock switch respectively.
The great current mutual inductor of the utility model (CT) is to be used for becoming the element of small-signal to big current conversion, so that can be detected by CPU; Voltage transformer (PT) is the element that is used for converting high voltage to small-signal, so that can be detected by CPU.
The power magnetic force keeping relay of the utility model is the on-load switch that is used for inserting system power supply the user, and it has through-flow big, quiescent dissipation is zero characteristics; Big electric current composite switch circuit, the composite module of, be used to load commutation automatic switchover parallelly connected with power magnetic force keeping relay by high-power silicon controlled rectifier can improve the power magnetic force keeping relay life-span.
The interlock circuit of the utility model is to be used to guarantee that terminal of the present invention at any time (comprised when driving element lost efficacy) only having one road system voltage to insert the user, prevents the circuit of phase fault.
The communication module of the utility model is the module that is used for terminal of the present invention and main-machine communication; Described CPU (U12), be terminal of the present invention be used to carry out various calculating, storage, with main-machine communication, carry out the element of Host Command.
The phase identification of circuit of the utility model is to be used for confirming that terminal A of the present invention, B, C three-phase voltage inlet wire keep and A, B, the C three-phase voltage corresponding electrical circuits of main frame.
The state of each switch is detected immediately in this terminal after start, making only has a switch to close among JA, JB, the JC, and JZ will be in closed position simultaneously.
During the utility model low-voltage power sharing of load terminal works, log-on data capture program at first constantly detects the size and the character of this terminal institute on-load, and is stored among the U12 (CPU) by certain stipulations, and main frame reads by the time.
When main frame was sent " wanting data " or " Switching power " order through the communication module of certain phase circuit, this order arrived U12 (CPU) through UA, U0 line, communication module, SIGIN pin.Host Command is carried out at this terminal U12 (CPU) immediately.If " want data ", then, issue main frame to data through SIGOUT pin, communication module, UA, U0 by the data format of agreement.If want " Switching power ", then undertaken: close controllable silicon-disconnection JZ-disconnection controllable silicon by following program--break off the switch that the current switch that has closed-the main frame requirement of closing is closed-close controllable silicon-close JZ-disconnection controllable silicon.Each step of said process confirms that all the side carries out next step.Then switching result report main frame.
The beneficial effect of the utility model is, the utility model can link through communication module and main frame, and the information such as power information at terminal are sent to main frame; And can receive the instruction of main frame, and the terminal load is carried out phase place differentiate, load is carried out distributing fast automatically switching; Part load is moved to another phase mutually from one; To keep three-phase load balanced, three-phase current reaches the needed degree of balance, satisfies the service requirement of distribution transformer.
The utility model is fit to the smart allocation of distribution transformer low-voltage power load.
Description of drawings
Fig. 1 is used for the sketch map of low-voltage power load intelligent dispensing system for the utility model;
Fig. 2 is the utility model low-voltage power load smart allocation terminal threephase switch interlock circuit;
Fig. 3 is the utility model low-voltage power load smart allocation terminal combination switch SCR control circuit diagram; Fig. 4 is the utility model low-voltage power load smart allocation terminal phase identification of circuit;
Fig. 5 is the utility model low-voltage power load smart allocation terminal CPU and three-phase communication module circuit diagram;
Symbolic representation is following among the figure:
In the threephase switch interlock circuit: R1, R2, R3, R4, R5, R6, R20, R21, R22 are current-limiting resistance; R9, R10, R11, R12, R13, R14 are emitter resistance; U1, U2, U3, U4, U5, U6 are the optocoupler that is used for isolated from power; T1, T2, T3, T4, T5, T6 are for driving the triode that relay is used; R17, R18, R19 are for detecting resistance; D1, D2, D3 are light-emitting diode; J1, J2, the J3 motor type relay of attaching most importance to; JA, JB, JC are power magnetic force keeping relay, and JA1, JB1, JC1 are its corresponding auxiliary contact.In the phase identification of circuit: R24, R31, R33 are resistance; U9, U11 are the optocoupler that is used for isolated from power; D7, D8 are diode.In the composite switch circuit: R7, R8 are current-limiting resistance; R15, R16 are emitter resistance; U7, U8 are the optocouplers that is used for isolated from power; T7, T8 are for driving the triode that relay is used, and T9, T10 are combination switch; JZ is a relay; R26, R27, R28, R29, R30 are current-limiting resistance; U10 is a controllable silicon, and D4 is a run indicator, and D5, D6 are diode.
Embodiment
The embodiment of the utility model is as shown in Figure 1.
Present embodiment low-voltage power load smart allocation terminal is made up of great current mutual inductor (CT), voltage transformer (PT), power magnetic force keeping relay, big electric current composite switch circuit, threephase switch interlock circuit, communication module, phase identification of circuit, CPU (U12).
The described phase identification of circuit of the utility model is used for optocoupler U9, the U11 of isolated from power by resistance R 24, R31, R33, and diode D7, D8 form, and be as shown in Figure 4.
System voltage UA, U0 connect the PT primary side through terminal CZ7, CZ8, induce and the identical signal of voltage U A phase place at 6,7 terminals of PT secondary side, and electric current flows back to the terminal 6 of PT secondary side through terminal 7, R33, D8, the former limit of U11, R31.The secondary of U11 produces a square wave identical with voltage U A.
System voltage UB meets R24 through terminal CZ1, and the former limit that meets D7, U9 through R24 again flows into U0, and the secondary of U9 produces and the synchronous square wave of voltage U B.Behind this starting up of terminal, U12 (CPU) gathers above-mentioned two square-wave signals immediately through PXX13, PXX15, confirms that thus UB is in advance or the phase place at this terminal (UA) that lags behind.
The described threephase switch interlock circuit of the utility model is by current-limiting resistance R1, R2, R3, R4, R5, R6; Emitter resistance R9, R10, R11, R12, R13, R14 are used for optocoupler U1, U2, U3, U4, U5, the U6 of isolated from power, drive triode T1, T2, T3, T4, T5, T6 that relay is used; Detect resistance R 17, R18, R19; Current-limiting resistance R20, R21, R22 are used to the light-emitting diode D1, D2, the D3 that indicate current operation separate, heavy motor type relay J1, J2, J3; Power magnetic force keeping relay JA, JB, JC and corresponding auxiliary contact JA1 thereof, JB1, JC1 form, and be as shown in Figure 2.
R1, R2, R3, R4, R5, R6 connect the base stage of T1, T2, T3, T4, T5, T6 respectively through U1, U2, U3, U4, U5, U6; The emitter of T1 connects 3 pin of J2, and the emitter of T2 connects the actuation coil of JA, and the emitter of T3 connects 3 pin of J1, and the emitter of T4 connects the actuation coil of JB, and the emitter of T5 connects 8 pin of J2, and the emitter of T6 connects the actuation coil of JC; 3 pin of another termination of the actuation coil of JA J3,8 pin of another termination of the actuation coil of JB J3,8 pin of another termination of the actuation coil of JC J1; The actuation coil of J1 connects the normally opened contact of JA1 and through meeting R20 to D1, and the actuation coil of J2 connects the normally opened contact of JB1 and through meeting R21 to D2, and the actuation coil of J3 connects the normally opened contact of JC1 and through meeting R22 to D3; The normally closed interlock of JA1, JB1, JC1 meets R17, R18, R19 respectively.
Composite switch circuit is by current-limiting resistance R7, R8, and emitter resistance R15, R16 are used for optocoupler U7, the U8 of isolated from power; Drive triode T7, T8 that relay is used, combination switch T9, T10, relay J Z; Current-limiting resistance R26, R27, R28, R29, R30, controllable silicon U10, run indicator D4; Elements such as diode D5, D6 are formed, and are as shown in Figure 3.Current-limiting resistance R7, R8 meet optocoupler U7, the U8 of isolated from power respectively, are connected to relay J Z through triode T7, T8; Relay J Z control combination switch T9, T10 work.
R7, R8 connect the base stage of T7, T8 respectively through U7, U8; The emitter of T7 and T8 connects the actuation coil of JZ respectively; The normally opened contact of JZ is connected in parallel on combination switch T9, T10 two ends; The controlled utmost point of T9 through R26, R27 and D5 connect 6 pin of controllable silicon U10, the controlled utmost point of T10 connects 4 pin of controllable silicon U10 through R28 and D6.
Claims (4)
1. low-voltage power load smart allocation terminal; It is characterized in that said terminal is made up of great current mutual inductor, voltage transformer, power magnetic force keeping relay, big electric current composite switch circuit, threephase switch interlock circuit, communication module, phase identification of circuit, CPU; The secondary winding of great current mutual inductor and voltage transformer connects the threephase switch interlock circuit; The threephase switch interlock circuit connects power magnetic force keeping relay and combination switch; CPU links to each other with communication module, phase identification of circuit, three-phase interlock switch respectively.
2. a kind of low-voltage power load smart allocation according to claim 1 terminal is characterized in that said phase identification of circuit is used for optocoupler U9, the U11 of isolated from power by resistance R 24, R31, R33, and diode D7, D8 form; System voltage UA, U0 connect the PT primary side through terminal CZ7, CZ8; Flow back to the terminal 6 of PT secondary side through terminal 7, R33, D8, the former limit of U11, R31 at the PT secondary side current; System voltage UB meets R24 through terminal CZ1, and the former limit that meets D7, U9 through R24 again flows into U0.
3. a kind of low-voltage power load smart allocation according to claim 1 terminal; It is characterized in that; Said threephase switch interlock circuit is by current-limiting resistance R1, R2, R3, R4, R5, R6, and emitter resistance R9, R10, R11, R12, R13, R14 are used for optocoupler U1, U2, U3, U4, U5, the U6 of isolated from power; Drive triode T1, T2, T3, T4, T5, T6 that relay is used; Detect resistance R 17, R18, R19, current-limiting resistance R20, R21, R22 are used to the light-emitting diode D1, D2, the D3 that indicate current operation separate; Heavy motor type relay J1, J2, J3, power magnetic force keeping relay JA, JB, JC and corresponding auxiliary contact JA1 thereof, JB1, JC1 form; R1, R2, R3, R4, R5, R6 connect the base stage of T1, T2, T3, T4, T5, T6 respectively through U1, U2, U3, U4, U5, U6; The emitter of T1 connects 3 pin of J2, and the emitter of T2 connects the actuation coil of JA, and the emitter of T3 connects 3 pin of J1, and the emitter of T4 connects the actuation coil of JB, and the emitter of T5 connects 8 pin of J2, and the emitter of T6 connects the actuation coil of JC; 3 pin of another termination of the actuation coil of JA J3,8 pin of another termination of the actuation coil of JB J3,8 pin of another termination of the actuation coil of JC J1; The actuation coil of J1 connects the normally opened contact of JA1 and through meeting R20 to D1, and the actuation coil of J2 connects the normally opened contact of JB1 and through meeting R21 to D2, and the actuation coil of J3 connects the normally opened contact of JC1 and through meeting R22 to D3; The normally closed interlock of JA1, JB1, JC1 meets R17, R18, R19 respectively.
4. a kind of low-voltage power load smart allocation according to claim 1 terminal is characterized in that said composite switch circuit is by current-limiting resistance R7, R8; Emitter resistance R15, R16 are used for optocoupler U7, the U8 of isolated from power, drive triode T7, T8 that relay is used; Combination switch T9, T10, relay J Z, current-limiting resistance R26, R27, R28, R29, R30; Controllable silicon U10, run indicator D4, elements such as diode D5, D6 are formed; Current-limiting resistance R7, R8 meet optocoupler U7, the U8 of isolated from power respectively, are connected to relay J Z through triode T7, T8; Relay J Z control combination switch T9, T10 work;
R7, R8 connect the base stage of T7, T8 respectively through U7, U8; The emitter of T7 and T8 connects the actuation coil of JZ respectively; The normally opened contact of JZ is connected in parallel on combination switch T9, T10 two ends; The controlled utmost point of T9 through R26, R27 and D5 connect 6 pin of controllable silicon U10, the controlled utmost point of T10 connects 4 pin of controllable silicon U10 through R28 and D6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220329536 CN202634084U (en) | 2012-07-10 | 2012-07-10 | Intelligent low-voltage power load distribution terminal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220329536 CN202634084U (en) | 2012-07-10 | 2012-07-10 | Intelligent low-voltage power load distribution terminal |
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| CN202634084U true CN202634084U (en) | 2012-12-26 |
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| CN 201220329536 Expired - Fee Related CN202634084U (en) | 2012-07-10 | 2012-07-10 | Intelligent low-voltage power load distribution terminal |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104821593A (en) * | 2015-05-08 | 2015-08-05 | 江西龙跃电子科技有限公司 | Low-voltage distribution transformer load intelligent adjustment system and distribution method |
| CN107181268A (en) * | 2017-06-16 | 2017-09-19 | 国网浙江省电力公司电力科学研究院 | The intelligent phase-change switch and its method of work of anti-phase fault before a kind of energization |
| CN113163389A (en) * | 2020-11-26 | 2021-07-23 | 国网浙江省电力有限公司信息通信分公司 | Communication link establishment method and device for power load control service |
-
2012
- 2012-07-10 CN CN 201220329536 patent/CN202634084U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104821593A (en) * | 2015-05-08 | 2015-08-05 | 江西龙跃电子科技有限公司 | Low-voltage distribution transformer load intelligent adjustment system and distribution method |
| CN107181268A (en) * | 2017-06-16 | 2017-09-19 | 国网浙江省电力公司电力科学研究院 | The intelligent phase-change switch and its method of work of anti-phase fault before a kind of energization |
| CN107181268B (en) * | 2017-06-16 | 2023-11-07 | 国网浙江省电力公司电力科学研究院 | Intelligent phase change switch capable of preventing interphase short circuit before electrifying and working method thereof |
| CN113163389A (en) * | 2020-11-26 | 2021-07-23 | 国网浙江省电力有限公司信息通信分公司 | Communication link establishment method and device for power load control service |
| CN113163389B (en) * | 2020-11-26 | 2024-03-01 | 国网浙江省电力有限公司信息通信分公司 | Communication link establishment method and device for power load control service |
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Legal Events
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| C14 | Grant of patent or utility model | ||
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Owner name: JIANGXI LONGYUE ELECTRONICS TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: LIU WANGSHU Effective date: 20130718 |
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| C41 | Transfer of patent application or patent right or utility model | ||
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Free format text: CORRECT: ADDRESS; FROM: 201103 MINHANG, SHANGHAI TO: 330009 NANCHANG, JIANGXI PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20130718 Address after: 330009 hi tech two road, Nanchang hi tech Development Zone, Jiangxi, Nanchang Patentee after: Jiangxi Longyue Electronics Technology Co., Ltd. Address before: Minhang District's six village 201103 Shanghai City No. 45 Room 301 Patentee before: Liu Wangshu |
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| ASS | Succession or assignment of patent right |
Owner name: ZHANG ZUNYU Free format text: FORMER OWNER: JIANGXI LONGYUE ELECTRONICS TECHNOLOGY CO., LTD. Effective date: 20150616 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150616 Address after: 330012 No. 1069, Shen Qiao Road, Chang Dong Industrial Zone, Jiangxi, Nanchang Patentee after: Zhang Zunyu Address before: 330009 hi tech two road, Nanchang hi tech Development Zone, Jiangxi, Nanchang Patentee before: Jiangxi Longyue Electronics Technology Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121226 Termination date: 20150710 |
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| EXPY | Termination of patent right or utility model |