CN2884647Y - Reactive compensator of electrical network - Google Patents
Reactive compensator of electrical network Download PDFInfo
- Publication number
- CN2884647Y CN2884647Y CNU2006200072316U CN200620007231U CN2884647Y CN 2884647 Y CN2884647 Y CN 2884647Y CN U2006200072316 U CNU2006200072316 U CN U2006200072316U CN 200620007231 U CN200620007231 U CN 200620007231U CN 2884647 Y CN2884647 Y CN 2884647Y
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- compensation
- reactive
- reactive power
- wireless data
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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
- Y02E40/30—Reactive power compensation
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Abstract
The utility model pertains to electric power equipment, in particular relates to a device compensating reactive power of power grids. Its technical program is: a grid reactive power compensation equipment, comprising a measuring control unit [1] and one or more switching and reactive compensation unit [2], and it is characterized in that: said measuring control unit [1] and said switching and reactive compensation unit [2] are both provided with a wireless data transmission unit [13,21], said measuring control unit [1] based on the measured voltage and current values of grid lines calculates reactive power or voltage as the control basis and sends control directives through said wireless data transmission unit [13], and said switching and reactive power compensation unit [2] through said wireless data transmission unit [21] receives the control directives and implements. The utility model separates the measuring control unit of the reactive power compensation device from the switching and reactive compensation unit for a long-distance (the line length of the rural power grids is normally 10 km above), and determines the compensation strategy according to the load of the overall power grid lines, thereby achieving better compensation, and meanwhile avoiding switching oscillations and over-voltage hazard, since a measuring control unit is only required for supporting a plurality of load nodes provided with reactive compensation unit, the investment in the equipment is saved and economic efficiency is significant.
Description
Technical field
The utility model belongs to a kind of power equipment, particularly a kind of device that power system reactive power is compensated.
Background technology
The reactive power automatic compensation device course of work that is applied at present on the distribution line is: controller is continual gathers any voltage and current of power network line by voltage/current instrument transformer (PT/CT), the size of operational analysis reactive power or power factor and voltage height, when each parameter meets the value that drops into setting, controller sends instruction and drives the fling-cut switch combined floodgate, and compensation condenser is put into operation; When controller judged that electrical network parameter reaches the set point of excision, controller sent instruction and drives the fling-cut switch separating brake, makes compensation condenser out of service.Its deficiency is:
1, because the measurement point and the compensation point of reactive power automatic compensation device are same point, be generally 2/3 place from sending end circuit length, and this point can not reflect the load condition of the power network line overall situation, also just can not the idle requirement of correct analysis, the condition of switching compensation condenser can not correctly be provided, and this has limited the further raising of compensation effect.
2, because controller can't measure idle amount and the variation in the measurement point front end circuit, this certainly will cause the part reactive power towards the power end foldback, not only strengthens line loss, and may cause overtension, causes the very fast damage of compensation condenser and other equipment.
3, when the reactive load amount of measurement point rear end during less than the compensation condenser capacity, reactive power flow can flow to power end, and at this moment controller can be thought " cross and mend " and excision compensation condenser; After excision, reactive power flow changes, and needs input compensation electric capacity again, therefore is easy to generate throw in-of oscillation.
The utility model content
The purpose of this utility model is: provide a kind of reactive power compensation better effects if, simultaneously safer and economic reactive power compensator.
The technical solution of the utility model is: a kind of electric network reactive compensation device, comprise a measure-controlling unit, one or more switching and reactive power compensation unit, it is characterized in that: described measure-controlling unit, described switching and reactive power compensation unit all have a wireless data sending unit, described measure-controlling unit calculates reactive power or voltage as the control foundation with the power network line electric current and voltage value that records, send control command by described wireless data sending unit, described switching and reactive power compensation unit are accepted described control command by described wireless data sending unit and are carried out.Described measure-controlling unit is arranged at the distribution line head end, and described switching and reactive power compensation unit are arranged at the one or more supply loads center in the distribution line.
The utility model separates the measure-controlling unit of reactive power compensator and switching and the long distance in reactive power compensation unit (the rural power grids line length is generally more than 10km), load condition decision compensation policy according to the power network line overall situation, thereby can obtain better compensation effect, avoid taking place the harm of throw in-of oscillation and overtension simultaneously, because a plurality of load buses are installed the reactive power compensation unit and are only needed a supporting measure-controlling unit, so the saving equipment investment, remarkable in economical benefits.
Description of drawings
Accompanying drawing is a structured flowchart of the present utility model.
Embodiment
Embodiment 1: referring to accompanying drawing, a kind of electric network reactive compensation device, comprise a measure-controlling unit 1, one or more switchings and reactive power compensation unit 2, it is characterized in that: described measure-controlling unit 1, described switching and reactive power compensation unit 2 all have a wireless data sending unit 13,21, described measure-controlling unit 1 calculates reactive power or voltage as the control foundation with the power network line electric current and voltage value that records, send control command by described wireless data sending unit 13, described switching and reactive power compensation unit 2 are accepted described control command by described wireless data sending unit 21 and are carried out.
Embodiment 2: referring to accompanying drawing, at embodiment 1 described electric network reactive compensation device, it is characterized in that:
Described wireless data sending unit 13,21 adopts time division frequency hopping technical transmission data;
The controller 12 of described measure-controlling unit 1 is the DSP240 single-chip microcomputer, and program storage adopts 2764 chips; Input signal adopts AC sampling 11, and three-phase voltage is through the PT conversion, and three-phase current is through the CT conversion, and becomes voltage signal on standard resistor, delivers to variable connector through the RC smothing filtering again, amplifies the A/D mouth of delivering to the DSP240 single-chip microcomputer through gain; Sample frequency is phases 128 point weekly, by the I/O output control command of described DSP240 single-chip microcomputer;
The compensation condenser group 22 of described switching and reactive power compensation unit 2 is divided into groups in 2: 1 ratio, realizes three grades of switchings compensation with two groups of automatic switches 23.
Electric network reactive compensation device according to claim 1 and 2 is characterized in that: described measure-controlling unit 1 also comprises:
A parameter setting module 14 is with dynamic tracking automatic setting and the artificial Control Parameter such as different reactive powers, voltage, power factor, time of setting;
A statistical module 15, with add up the time of always putting into operation, capacitor group making time, capacitor group put into operation number of times or operational percentage etc.;
A display module 16 is to show operational factor, operating state, guard mode etc.;
A communication module 17 is made a copy of and is monitored to realize long-range service data.
Electric network reactive compensation device according to claim 3, it is characterized in that: further comprising one or more fixedly reactive power compensation unit 3 that do not participate in dynamic switching, described fixedly reactive power compensation unit 3 also has a wireless data sending unit 31, and described measure-controlling unit 1 monitors the running status of described fixedly reactive power compensation unit 3 by described wireless data sending unit 13,31.
Claims (4)
1. electric network reactive compensation device, comprise a measure-controlling unit [1], one or more switchings and reactive power compensation unit [2], it is characterized in that: described measure-controlling unit [1], described switching and reactive power compensation unit [2] all have a wireless data sending unit [13,21], described measure-controlling unit [1] calculates reactive power or voltage as the control foundation with the power network line electric current and voltage value that records, send control command by described wireless data sending unit [13], described switching and reactive power compensation unit [2] are accepted described control command by described wireless data sending unit [21] and are carried out.
2. electric network reactive compensation device according to claim 1 is characterized in that:
Described wireless data sending unit [13,21] adopts time division frequency hopping technical transmission data;
The controller [12] of described measure-controlling unit [1] is the DSP240 single-chip microcomputer, and program storage adopts 2764 chips; Input signal adopts AC sampling [11], and three-phase voltage is through the PT conversion, and three-phase current is through the CT conversion, and becomes voltage signal on standard resistor, delivers to variable connector through the RC smothing filtering again, amplifies the A/D mouth of delivering to the DSP240 single-chip microcomputer through gain; Sample frequency is phases 128 point weekly, by the I/O output control command of described DSP240 single-chip microcomputer;
The compensation condenser group [22] of described switching and reactive power compensation unit [2] is divided into groups in 2: 1 ratio, realizes three grades of switchings compensation with two groups of automatic switches [23].
3. electric network reactive compensation device according to claim 1 and 2 is characterized in that: described measure-controlling unit [1] also comprises:
A parameter setting module [14] is with dynamic tracking automatic setting and the artificial Control Parameter such as different reactive powers, voltage, power factor, time of setting;
A statistical module [15], with add up the time of always putting into operation, capacitor group making time, capacitor group put into operation number of times or operational percentage etc.;
A display module [16] is to show operational factor, operating state, guard mode etc.;
A communication module [17] is made a copy of and is monitored to realize long-range service data.
4. electric network reactive compensation device according to claim 3, it is characterized in that: further comprising one or more fixedly reactive power compensation unit [3] that do not participate in dynamic switching, described fixedly reactive power compensation unit [3] also has a wireless data sending unit [31], and described measure-controlling unit [1] monitors the running status of described fixedly reactive power compensation unit [3] by described wireless data sending unit [13,31].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200072316U CN2884647Y (en) | 2006-03-02 | 2006-03-02 | Reactive compensator of electrical network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200072316U CN2884647Y (en) | 2006-03-02 | 2006-03-02 | Reactive compensator of electrical network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2884647Y true CN2884647Y (en) | 2007-03-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200072316U Expired - Lifetime CN2884647Y (en) | 2006-03-02 | 2006-03-02 | Reactive compensator of electrical network |
Country Status (1)
| Country | Link |
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| CN (1) | CN2884647Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104022520A (en) * | 2014-06-20 | 2014-09-03 | 国网河北省电力公司衡水供电分公司 | Reactive power compensation device and method for power grid |
-
2006
- 2006-03-02 CN CNU2006200072316U patent/CN2884647Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104022520A (en) * | 2014-06-20 | 2014-09-03 | 国网河北省电力公司衡水供电分公司 | Reactive power compensation device and method for power grid |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070328 |
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| EXPY | Termination of patent right or utility model |