CN201994673U - Switching virtual circuit (SVC) control system with direct-current ice melting function - Google Patents
Switching virtual circuit (SVC) control system with direct-current ice melting function Download PDFInfo
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- CN201994673U CN201994673U CN2011200384982U CN201120038498U CN201994673U CN 201994673 U CN201994673 U CN 201994673U CN 2011200384982 U CN2011200384982 U CN 2011200384982U CN 201120038498 U CN201120038498 U CN 201120038498U CN 201994673 U CN201994673 U CN 201994673U
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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
- Y02E40/10—Flexible AC transmission systems [FACTS]
Abstract
The utility model relates to a switching virtual circuit (SVC) control system with a direct-current ice melting function, which comprises an SVC control unit, an ice melting control unit, a switching value input and output unit and a pulse switching unit, wherein the SVC control unit, the ice melting control unit and the switching value input and output unit are respectively connected with the pulse switching unit, and the pulse switching unit is connected with a thyristor valve group. Under the normal condition of the control system, equipment has an SVC function and provides continuous adjustable reactive power for the system, the functions of stabilizing the system voltage, improving the system stability and the like are realized, and the equipment has the direct-current ice melting function when freezing disasters occur.
Description
Technical field
The utility model relates to a kind of SVC control system with DC ice melting function.
Background technology
Since 10 days January in 2008, historical rare low temperature, sleet freezing weather have appearred in China Central China, East China, southern most of area, longer duration, coverage is wide, the extent of injury is dark, bring the large tracts of land icing to power transformating and supplying facility, ice covering thickness generally surpasses 30 millimeters, and some areas reach 80 millimeters, design standard considerably beyond regulation, cause transmission line to fall tower, broken string in a large number, electric power facility is damaged on a large scale, and electric network composition is seriously damaged.
SVC device with DC ice melting function is the power electronic equipment that has adopted the complex function of controlled thyristor technology.When circuit generation freezing disaster, the characteristics that the DC de-icing device of employing silicon controlled rectifier has the output dc voltage controlled current and can regulate continuously have good ice-melt effect and economic benefit.Yet freezing disaster is not frequent generation, makes the service efficiency of DC de-icing device extremely low, causes the cost waste.
In view of silicon controlled rectifier and SVC device all adopt controllable silicon to have certain similitude as main power electronic device and structure, so if can realize the conversion of SVC device and DC de-icing device by the control of several isolating switches, make the SVC device have DC ice melting and SVC dual-use function, equipment has the DC ice melting function in the time of will being implemented in the generation freezing disaster, for transmission line provides controlled direct current and direct voltage, reach the purpose of ice-melt.Under normal conditions, equipment is the SVC function, for system provides adjustable idle continuously, realizes functions such as systems stabilisation voltage, the raising stability of a system.
Summary of the invention
The purpose of this utility model provides a kind of SVC control system with DC ice melting function, this control system under normal conditions, equipment is the SVC function, for system provides continuously adjustable idle, realizes systems stabilisation voltage, improves function such as the stability of a system; Equipment has the DC ice melting function when freezing disaster takes place.
For achieving the above object, the utility model is achieved through the following technical solutions:
A kind of SVC control system with DC ice melting function comprises SVC control unit, ice-melt control unit, switching value input-output unit, pulse switch unit; SVC control unit, ice-melt control unit, switching value input-output unit all are connected with the pulse switch unit, and the pulse switch unit is connected with the thyristor valve group.
Described SVC control unit collection examination point voltage signal, current signal and synchronous voltage signal calculate the compensation admittance, calculate the thyristor trigger angle according to the compensation admittance meter, are that benchmark sends trigger impulse with the synchronizing voltage zero crossing.
Described ice-melt control unit is gathered direct voltage, dc current signal, compares with reference current, and difference is sent into controller, regulates and calculates through PI, obtains the thyristor trigger angle, is that benchmark sends trigger impulse with the synchronizing voltage zero crossing.
The collection of described switching value input-output unit has SVC device primary equipment topological transformation isolating switch state and TCR valve group circuit-breaker status, filter and breaker state and the mode switch state of DC ice melting function, simultaneously to the SVC device primary equipment topological transformation isolating switch with DC ice melting function, TCR valve group circuit breaker and filter and breaker output deciliter order.
Described pulse switch unit realization SVC pattern and ice-melt mode are to the interface of thyristor valve group, when the pulse switch unit receives the SVC mode command, SVC control unit trigger impulse exported to the thyristor valve group pulse receive, with the feedback reception of impulse that the SVC control unit is exported in the feedback pulse of thyristor valve group, simultaneously ice-melt control unit trigger impulse is exported to ice-melt control unit feedback reception of impulse; When the pulse switch unit receives the ice-melt mode order, ice-melt control unit trigger impulse exported to the thyristor valve group pulse receive, with the feedback reception of impulse that the ice-melt control unit is exported in the feedback pulse of thyristor valve group, simultaneously SVC control unit trigger impulse is exported to SVC control unit feedback reception of impulse.
Compared with prior art, the beneficial effects of the utility model are:
This control system under normal conditions, equipment is the SVC function, for system provides continuously adjustable idle, realizes systems stabilisation voltage, improves function such as the stability of a system; Equipment has the DC ice melting function when freezing disaster takes place.Both can guarantee to have DC ice melting function SVC reliable and stable operation under ice-melt mode and SVC pattern, software, the hardware of again can directly transplanting existing SVC controller and rectification (ice-melt) controller, the shortening construction cycle has remarkable economy.
Description of drawings
Fig. 1 is the SVC device main electrical scheme schematic diagram that the typical case has the DC ice melting function;
Fig. 2 is the SVC control system structured flowchart with DC ice melting function.
Embodiment
See Fig. 2, a kind of SVC control system with DC ice melting function comprises SVC control unit, ice-melt control unit, switching value input-output unit, pulse switch unit; SVC control unit, ice-melt control unit, switching value input-output unit all are connected with the pulse switch unit, and the pulse switch unit is connected with the thyristor valve group.
Described SVC control unit collection examination point voltage signal, SVC current signal and synchronous voltage signal calculate the compensation admittance, and are that benchmark sends trigger impulse with the synchronizing voltage.SVC control unit output trigger impulse is inserted the pulse switch unit, and the feedback pulse with the pulse switch unit simultaneously inserts the SVC control unit.
Described ice-melt control unit is gathered direct voltage, dc current signal, calculates thyristor trigger angle size, and is that benchmark sends trigger impulse with the synchronizing voltage.Ice-melt control unit output trigger impulse is inserted the pulse switch unit, and the feedback pulse with the pulse switch unit simultaneously inserts the ice-melt control unit.
The collection of described switching value input-output unit has DC ice melting function SVC device primary equipment topological transformation isolating switch state and TCR valve group circuit-breaker status, filter and breaker state and mode switch state, and output simultaneously has DC ice melting function SVC device primary equipment topological transformation isolating switch, TCR valve group circuit breaker and filter and breaker deciliter order.When the switching value input-output unit collect mode of operation by the SVC mode switch to ice-melt mode, and when current TCR valve group circuit breaker is in released state, export a series of switch branches, close command operation device primary equipment topological transformation isolating switch, make the primary equipment topological structure be transformed to the silicon controlled rectifier structure.After time-delay a period of time, detect the isolating switch position, confirm that the primary equipment topological structure is transformed to after the silicon controlled rectifier structure to send to the pulse switch unit to switch to the ice-melt mode order.When collecting mode of operation, the switching value input-output unit switches to the SVC pattern by ice-melt mode, and when current TCR valve group circuit breaker is in released state, export a series of switch branches, close command operation device primary equipment topological transformation isolating switch, make the primary equipment topological structure be transformed to the SVC structure.After time-delay a period of time, detect the isolating switch position, confirm that the primary equipment topological structure is transformed to after the SVC structure to send to the pulse switch unit to switch to the SVC mode command.The control procedure of this device is: the on off state of SVC primary equipment topological transformation isolating switch GS1-GS6, G1-G4 with DC ice melting function shown in Figure 1 is inserted the switching value input-output unit; TCR valve group circuit breaker, filter and breaker and mode selector switch state are inserted the switching value input-output unit.The switching value output of switching value input-output unit is inserted closing circuit and the sub-gate circuit of primary equipment topological transformation isolating switch GS1-GS6, G1-G4.When the switching value input-output unit collect mode of operation by the SVC mode switch to ice-melt mode, and when current TCR valve group circuit breaker is in released state, export a series of switch branches, close order close GS1, GS2, G2, G3, G4 isolating switch, separately G1, GS3, GS4, GS5, GS6 isolating switch.After time-delay a period of time, detect isolating switch GS1-GS6, G1-G4 position, confirm that the primary equipment topological structure is transformed to after the silicon controlled rectifier structure to send to the pulse switch unit to switch to the ice-melt mode order.When collecting mode of operation, the switching value input-output unit switches to the SVC pattern by ice-melt mode, and when current TCR valve group circuit breaker is in released state, export a series of switch branches, close order close GS1, GS2, GS3, GS4, GS5, GS6 isolating switch, open G1, G2, G3, G4 isolating switch, make the primary equipment topological structure be transformed to the SVC structure.After time-delay a period of time, detect isolating switch GS1-GS6, G1-G4 position, confirm that the primary equipment topological structure is transformed to after the SVC structure to send to the pulse switch unit to switch to the SVC mode command.
SVC control unit trigger impulse, ice-melt (rectification) control unit trigger impulse, switching value input-output unit switching command, valve group feedback pulse are inserted the pulse switch unit; The trigger impulse of pulse switch unit output is inserted the thyristor valve group, with the feedback pulse access SVC control unit and ice-melt (rectification) control unit of pulse switch unit output.
When the pulse switch unit receive when switching to the SVC mode command SVC control unit trigger impulse exported to the thyristor valve group pulse receive, with the feedback reception of impulse that the SVC control unit is exported in the feedback pulse of thyristor valve group, simultaneously ice-melt control unit trigger impulse is exported to ice-melt control unit feedback reception of impulse.
When the pulse switch unit receive when changing to the ice-melt mode order ice-melt control unit trigger impulse exported to the thyristor valve group pulse receive, with the feedback reception of impulse that the ice-melt control unit is exported in the feedback pulse of thyristor valve group, simultaneously SVC control unit trigger impulse is exported to SVC control unit feedback reception of impulse.
Claims (1)
1. the SVC control system with DC ice melting function is characterized in that, comprises SVC control unit, ice-melt control unit, switching value input-output unit, pulse switch unit; SVC control unit, ice-melt control unit, switching value input-output unit all are connected with the pulse switch unit, and the pulse switch unit is connected with the thyristor valve group;
Described SVC control unit collection examination point voltage signal, current signal and synchronous voltage signal calculate the compensation admittance, calculate the thyristor trigger angle according to the compensation admittance meter, are that benchmark sends trigger impulse with the synchronizing voltage zero crossing;
Described ice-melt control unit is gathered direct voltage, dc current signal, compares with reference current, and difference is sent into controller, regulates and calculates through PI, obtains the thyristor trigger angle, is that benchmark sends trigger impulse with the synchronizing voltage zero crossing;
The collection of described switching value input-output unit has SVC device primary equipment topological transformation isolating switch state and TCR valve group circuit-breaker status, filter and breaker state and the mode switch state of DC ice melting function, simultaneously to the SVC device primary equipment topological transformation isolating switch with DC ice melting function, TCR valve group circuit breaker and filter and breaker output deciliter order;
Described pulse switch unit realization SVC pattern and ice-melt mode are to the interface of thyristor valve group, when the pulse switch unit receives the SVC mode command, SVC control unit trigger impulse exported to the thyristor valve group pulse receive, with the feedback reception of impulse that the SVC control unit is exported in the feedback pulse of thyristor valve group, simultaneously ice-melt control unit trigger impulse is exported to ice-melt control unit feedback reception of impulse; When the pulse switch unit receives the ice-melt mode order, ice-melt control unit trigger impulse exported to the thyristor valve group pulse receive, with the feedback reception of impulse that the ice-melt control unit is exported in the feedback pulse of thyristor valve group, simultaneously SVC control unit trigger impulse is exported to SVC control unit feedback reception of impulse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200384982U CN201994673U (en) | 2011-02-15 | 2011-02-15 | Switching virtual circuit (SVC) control system with direct-current ice melting function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011200384982U CN201994673U (en) | 2011-02-15 | 2011-02-15 | Switching virtual circuit (SVC) control system with direct-current ice melting function |
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| CN201994673U true CN201994673U (en) | 2011-09-28 |
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| CN2011200384982U Expired - Lifetime CN201994673U (en) | 2011-02-15 | 2011-02-15 | Switching virtual circuit (SVC) control system with direct-current ice melting function |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103746327A (en) * | 2013-12-18 | 2014-04-23 | 广西大学 | 10KV station-used type DC ice melting device |
| CN104319786A (en) * | 2014-10-08 | 2015-01-28 | 贵州电网公司电网规划研究中心 | SVG (Static Var Generator) DC ice melting device control system |
| CN106856319A (en) * | 2017-03-07 | 2017-06-16 | 贵州电网有限责任公司电力科学研究院 | A kind of deicing device that DC current is passed through to icing circuit |
-
2011
- 2011-02-15 CN CN2011200384982U patent/CN201994673U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103746327A (en) * | 2013-12-18 | 2014-04-23 | 广西大学 | 10KV station-used type DC ice melting device |
| CN103746327B (en) * | 2013-12-18 | 2016-10-05 | 广西宏湖水利电业科技发展有限公司 | Formula DC de-icing device is used at a kind of 10KV station |
| CN104319786A (en) * | 2014-10-08 | 2015-01-28 | 贵州电网公司电网规划研究中心 | SVG (Static Var Generator) DC ice melting device control system |
| CN104319786B (en) * | 2014-10-08 | 2016-06-29 | 贵州电网公司电网规划研究中心 | A kind of DC de-icing device based on SVG controls system |
| CN106856319A (en) * | 2017-03-07 | 2017-06-16 | 贵州电网有限责任公司电力科学研究院 | A kind of deicing device that DC current is passed through to icing circuit |
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Granted publication date: 20110928 |
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| CX01 | Expiry of patent term |