CN204761034U - Join in marriage grid voltage and administer device - Google Patents
Join in marriage grid voltage and administer device Download PDFInfo
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- CN204761034U CN204761034U CN201520163297.3U CN201520163297U CN204761034U CN 204761034 U CN204761034 U CN 204761034U CN 201520163297 U CN201520163297 U CN 201520163297U CN 204761034 U CN204761034 U CN 204761034U
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- 238000010586 diagram Methods 0.000 description 4
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- 239000003990 capacitor Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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Abstract
The utility model provides a join in marriage grid voltage and administer device, includes three -phase voltage testing (11), uncontrollable rectifier module (12), direct current boost module (13) and three -phase output module. The device puts in series between distribution transformer secondary side end and the user when using, the device switch KM that has connected in parallel. When the device three -phase voltage testing detect the three phase voltage between 220V (+ 7, - 10%), three phase current imbalance degree < 15% o'clock, when satisfying two above -mentioned conditions, KM was in the closure state, will install the short circuit, it joins in marriage net standard voltage, three phase current imbalance degree >to exceed the country when the three phase voltage, 15% o'clock, above -mentioned condition had one to be unsatisfied with, and then KM is in off -state, and the device gets into operating condition, no matter which kind of state KM is in, and KM2 all at the closure state, has guaranteed that direct current boost module voltage stabilization at 720V, waits for the three -phase output instruction at any time, when the shortcircuit condition appears in three -phase contravariant side, the KM2 tripping, thereby when having realized KM status switching, the seamless output of three -phase contravariant side.
Description
Technical field
The utility model relates to a kind of distribution network voltage controlling device, belongs to power distribution technical field
Background technology
Along with production and growth in the living standard, resident, business, the increasing sharply of industrial all kinds of power consumption equipment, because 10kV part rack radius of electricity supply is long, line end voltage loss is too large, part platform district is heavily loaded, conductor cross-section is little, circuit reactive power is supplemented the reasons such as deficiency and caused 10kV high side voltage on the low side, causes low-pressure side low voltage thus; Have the impact loads such as a large amount of asynchronous motors in low-pressure side power distribution network simultaneously, cause part platform district natural power factor on the low side; When compensating shunt capacitor off-capacity, causing circuit to carry a large amount of reactive power, causing low voltage, when compensating shunt capacitor capacity overcompensation, causing low voltage.With the lagging in development of Distribution Network Frame, platform district low-voltage load forecasting inaccuracy, threephase load is unbalanced thus cause three-phase imbalance.Therefore the research changing supply power voltage is seemed and be even more important.
Summary of the invention
The purpose of this utility model is, higher or on the low side for distributing net platform region low-pressure side three-phase voltage, affects the use of user power utilization equipment, and the utility model discloses a kind of distribution network voltage controlling device, solves the problem of low-voltage distribution network spread of voltage.
Realizing the technical solution of the utility model is, a kind of distribution network voltage controlling device of the utility model comprises detecting voltage by three phase module, uncontrollable rectification module, DC boosting module and three-phase output module.Detecting voltage by three phase module is arranged on the input side of distribution network voltage controlling device, distribution three-phase system input connects the input of uncontrollable rectification module, the output of uncontrollable rectification module connects the input of DC boosting module, the output of DC boosting module connects the input of three-phase output module, the output terminating user of three-phase output module by switch.
Detecting voltage by three phase module for detecting input side three-phase voltage value, thus calculates non-equilibrium among three phase voltages.
It is direct current that uncontrollable rectification module is used for the three-phase alternating current rectification of input, not by the impact of front end grid voltage amplitude, in order to prevent the impact of the moment impact of electric current, installs reactor additional in its front end; The three-phase bridge rectifier circuit that uncontrollable rectification module is made up of six rectifier diodes.
DC boosting module is used for the direct current that uncontrollable rectification module is sent here to boost, and by DC-DC booster circuit, keeps DC voltage 720V, and is connected with inversion output module through K switch M2.
Three-phase output module is used for direct current DC boosting module sent here through K switch M2, and inversion exports the interchange of three-phase equilibrium; Comprise three single-phase outputs, no longer need reactive-load compensation equipment by single-phase inversion, can realize automatic regulating power factor, three single-phase designs respectively simultaneously avoid moment impact single-phase load on the impact of other two-phases.
A kind of distribution network voltage of the utility model controlling device is applied to high/low when being press-fitted net platform region, this device first detects voltage magnitude by detecting voltage by three phase module and whether the degree of balance meets national standard, if in the scope of regulation, then KM is in closure state; If the standard of not meeting, then KM is in off-state, and namely this device string is in low-voltage distribution network, by the uncontrollable DC Module of three-phase, after changing interchange into direct current, by DC/DC DC boosting module, DC side is boosted to 720V, by three independent inverter bridge, inversion goes out three-phase voltage.
When the utility model uses, by between distribution voltage controlling device series connection access distribution transformer secondary side end and user's 380 volts of buses, distribution voltage controlling device is in parallel K switch M.
When the detecting voltage by three phase module of described device detects that three-phase voltage is at national distribution normal voltage 220V(+7,-10%) between, three-phase current unbalance degree <15% time, when meeting above-mentioned two conditions, KM is in closure state, by low pressure controlling device short circuit; When three-phase voltage exceedes national distribution normal voltage, during three-phase current unbalance degree >15%, above-mentioned two conditions have one not meet, then KM is in off-state, and distribution low pressure controlling device enters operating state; No matter which kind of state KM is in, and KM2 is all in closure state, ensure that DC boosting module voltage is stabilized in 720V, waits for three-phase output order at any time; When there is short-circuit condition in three-phase inversion side, KM2 tripping; Thus when achieving the switching of KM state, the seamless output of three-phase inversion side.
The beneficial effects of the utility model are, the utility model detects voltage magnitude and the degree of balance by detecting voltage by three phase module, when voltage magnitude and three-phase equilibrium degree overrun, adopt and hand over--directly--hands over conversion module, obtains stable three-phase and export.The utility model no longer needs reactive-load compensation equipment by single-phase inversion, can realize automatic regulating power factor, and three single-phase designs respectively simultaneously avoid moment impact single-phase load on the impact of other two-phases.
The utility model is applicable to the high/low voltage being press-fitted net platform region and administers.
Accompanying drawing explanation
Fig. 1 is the utility model distribution voltage controlling device wiring schematic diagram;
Fig. 2 is the utility model structural principle schematic diagram;
In figure, 1 is distribution voltage controlling device; 2 is 10kV buses; 3 is distribution transformers; 4 is 380V buses; 5 is user sides; 11 is detecting voltage by three phase modules; 12 is uncontrollable rectification modules; 13 is DC boosting modules; 14 is three-phase output modules.
Embodiment
Embodiment of the present utility model as depicted in figs. 1 and 2.
Fig. 2 is the circuit structure diagram of a kind of distribution network voltage controlling device of the present embodiment.
A kind of distribution network voltage controlling device of the present embodiment comprises detecting voltage by three phase module 11, uncontrollable rectification module 12, DC boosting module 13 and three-phase output module 14.
Detecting voltage by three phase module 11 is arranged on the input of three-phase low-voltage circuit, for detecting input side three-phase voltage value, thus calculates non-equilibrium among three phase voltages;
Uncontrollable rectification module 12 comprises the three-phase bridge rectifier circuit be made up of six rectifier diodes, in order to prevent the impact of the moment impact of electric current, installs reactor L1, L2 and L3 additional in its front end.
DC boosting module 13 is by comprising the DC-DC booster circuit and K switch M2 that IGBT forms, and DC-DC booster circuit is by direct voltage by being promoted to 720 volts, and KM2 is in closure state, when inversion outlet side three-phase shortcircuit is KM2 tripping.
Three-phase output module 14 is made up of three single-phase inversion circuit, and direct voltage DC boosting module sent here carries out inversion; No longer need reactive-load compensation equipment by single-phase inversion, can realize automatic regulating power factor, three single-phase designs respectively simultaneously avoid moment impact single-phase load on the impact of other two-phases.
Fig. 1 is the present embodiment distribution voltage controlling device wiring schematic diagram.Wherein 1 represents distribution voltage controlling device; 2 represent 10kV bus; 3 represent distribution transformer; 4 represent 380V bus; 5 represent user side.
By between distribution voltage controlling device series connection access distribution transformer secondary side and 380 volts of buses, distribution voltage controlling device is in parallel K switch M.
When the detecting voltage by three phase module of described device detects that three-phase voltage is at national distribution normal voltage 220V(+7,-10%) between, three-phase current unbalance degree <15% time, when meeting above-mentioned two conditions, KM is in closure state, by low pressure controlling device short circuit; When three-phase voltage exceedes national distribution normal voltage, during three-phase current unbalance degree >15%, above-mentioned two conditions have one not meet, then KM is in off-state, and distribution low pressure controlling device enters operating state; No matter which kind of state KM is in, and KM2 is all in closure state, ensure that DC boosting module voltage is stabilized in 720V, waits for three-phase output order at any time; When there is short-circuit condition in three-phase inversion side, KM2 tripping; Thus when achieving the switching of KM state, the seamless output of three-phase inversion side.
Claims (3)
1. a distribution network voltage controlling device, is characterized in that, comprises,
Detecting voltage by three phase module, for detecting input side three-phase voltage value, thus calculates non-equilibrium among three phase voltages;
Uncontrollable rectification module, for being direct current by the three-phase alternating current rectification of input;
DC boosting module, boosts for the direct current sent here by uncontrollable rectification module, by DC-DC booster circuit, keeps DC voltage 720V;
Three-phase output module, for direct current DC boosting module sent here through K switch M2, inversion exports the interchange of three-phase equilibrium;
Described detecting voltage by three phase module is arranged on the input side of distribution network voltage controlling device, distribution three-phase system connects the input of uncontrollable rectification module, the output of uncontrollable rectification module connects the input of DC boosting module, the output of DC boosting module connects the input of three-phase output module, the output terminating user of three-phase output module by K switch M2.
2. a kind of distribution network voltage controlling device according to claim 1, is characterized in that, described three-phase output module is made up of three single-phase inversion circuit.
3. a kind of distribution network voltage controlling device according to claim 1, is characterized in that, the three-phase bridge rectifier circuit that described uncontrollable rectification module is made up of six rectifier diodes; Reactor has been installed additional in its front end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520163297.3U CN204761034U (en) | 2015-03-23 | 2015-03-23 | Join in marriage grid voltage and administer device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520163297.3U CN204761034U (en) | 2015-03-23 | 2015-03-23 | Join in marriage grid voltage and administer device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204761034U true CN204761034U (en) | 2015-11-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520163297.3U Expired - Fee Related CN204761034U (en) | 2015-03-23 | 2015-03-23 | Join in marriage grid voltage and administer device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204761034U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104779620A (en) * | 2015-03-23 | 2015-07-15 | 国家电网公司 | Voltage control device of power distribution network |
| CN110323766A (en) * | 2019-07-19 | 2019-10-11 | 云南电网有限责任公司电力科学研究院 | A kind of low-voltage network imbalance of three-phase voltage governing system and method |
-
2015
- 2015-03-23 CN CN201520163297.3U patent/CN204761034U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104779620A (en) * | 2015-03-23 | 2015-07-15 | 国家电网公司 | Voltage control device of power distribution network |
| CN104779620B (en) * | 2015-03-23 | 2017-06-20 | 国家电网公司 | A kind of distribution network voltage controlling device |
| CN110323766A (en) * | 2019-07-19 | 2019-10-11 | 云南电网有限责任公司电力科学研究院 | A kind of low-voltage network imbalance of three-phase voltage governing system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151111 Termination date: 20210323 |