CN105656101A - Voltage monitoring circuit of energy storage capacitor of quick bypass switch - Google Patents
Voltage monitoring circuit of energy storage capacitor of quick bypass switch Download PDFInfo
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- CN105656101A CN105656101A CN201410665538.4A CN201410665538A CN105656101A CN 105656101 A CN105656101 A CN 105656101A CN 201410665538 A CN201410665538 A CN 201410665538A CN 105656101 A CN105656101 A CN 105656101A
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Abstract
The invention provides a voltage monitoring circuit of an energy storage capacitor of a quick bypass switch. The monitoring circuit comprises an energy storage capacitor charging part, an energy storage capacitor charge monitoring part, an energy storage capacitor discharging part and an energy storage capacitor discharging monitoring part. The energy storage capacitor charging part is connected with an energy storage capacitor by a charging loop; the energy storage capacitor charge monitoring part is connected with the energy storage capacitor by a voltage sampling unit and is connected with the energy storage capacitor charging part by a bypass switch; the energy storage capacitor discharging part is connected with the energy storage capacitor by a quick bypass switch repulsion-force mechanism; and the energy storage capacitor discharging monitoring part is connected with the energy storage capacitor by a current detection unit and is connected with the energy storage capacitor discharging part by a discharging control switch. The bypass switch and the discharging control switch are thyristors or IGBTs. According to the invention, with the circuit, controlling and fault positioning of the quick bypass switch energy system are realized; and a technical support is provided for application of the quick bypass witch to over-voltage protection of correlated equipment of the transmission line.
Description
Technical field
The present invention relates to a kind of circuit, in particular to the voltage monitoring circuit of a kind of Quick side way switch storage capacitor.
Background technology
Typical over-voltage for transmission line of electricity series compensation capacitor protects equipment to be made up of metal oxide pressure-limiting device (MOV), spark gap (GAP) and by-pass switch. Wherein, MOV because of himself impedance operator can when the system failure voltage levvl at volitional check series capacitor two ends; GAP can be sent command triggers conducting by Control protection system when MOV absorbs too much energy or in the series capacitor quick bypass situation of needs; Bypass breaker is the temporary or permanent bypass by Control protection system control realization under the own failure condition of the system failure or device. In the said equipment, GAP is as a kind of controlled high-voltage high-speed bypass equipment, particularly significant for transmission line of electricity series compensation capacitor overvoltage protection, it being widely used, but there is also following shortcoming: 1) running voltage is higher, close to self discharge voltage, controllability is limited, there is certain controlling dead error; 2) being affected relatively greatly by ambient temperature, humidity and processing technique, discharge voltage dispersibility is bigger. It is, thus, sought for the high-voltage high-speed shunting device that a kind of performance is more more superior than GAP.
Quick side way switch (FBS) is made up of vacuum interrupter and electromagnetic repulsion force mechanism, and its simple in construction, divide-shut brake speed is fast, reliability is high and on-state loss is little. In recent years, along with the development of Quick side way switch (FBS) technology, its speed of action is accelerated, and resistance to voltage levels improves, and can substitute GAP in some occasions, play quick bypass, overvoltage protection effect. Compared to spark gap, FBS affected by environment little, be absent from controlling dead error, therefore, it has very wide application prospect as series capacitor overvoltage protection device.
FBS repulsive force mechanism complete quick conjunction/separating brake action needed for energy by its in advance completed charging storage capacitor provide. Different from the application of FBS routine; when FBS is as series capacitor overvoltage protective device; its storage capacitor is positioned on high potential apparatus platform; electromagnetic environment is complex; storage capacitor can be carried out charge and discharge by the control circuit not only needing storage capacitor; and need it that storage capacitor its voltage, discharge loop state are monitored, and related status information in real time, is reliably sent to the distant place Control protection system outside platform.
It is thus desirable to propose the voltage monitoring circuit of a kind of Quick side way switch storage capacitor; the storage capacitor of Quick side way switch FBS can be carried out charge and discharge control by it, the control protective unit that simultaneously also can be sent to outside platform by the current form of optical signal by the storage capacitor state detected in real time.
Summary of the invention
In order to solve the problems referred to above existing in prior art; the present invention provides the voltage monitoring circuit of a kind of Quick side way switch storage capacitor; the control of this circuit realiration FBS energy system and fault location; less by electromagnetic environment interference, the overvoltage protection being applied to transmission line of electricity relevant device for FBS provides technical support.
Present invention provide the technical scheme that the voltage monitoring circuit of a kind of Quick side way switch storage capacitor, it thes improvement is that: described supervisory circuit includes storage capacitor live part, storage capacitor charging monitoring part, storage capacitor discharge portion and storage capacitor electric discharge monitor portion; Described storage capacitor live part is connected with storage capacitor by charge circuit; Described storage capacitor charging monitoring part is connected with described storage capacitor by voltage sampling unit, and is connected with described storage capacitor live part by by-pass switch; Described storage capacitor discharge portion is connected with described storage capacitor by Quick side way switch repulsive force mechanism; Described storage capacitor electric discharge monitor portion is connected with described storage capacitor by current detecting unit, and is connected with described storage capacitor discharge portion by discharge control switch; Described by-pass switch and described discharge control switch are IGCT or IGBT.
Preferably, described storage capacitor live part includes energy taking device, by-pass switch and charge circuit; Described energy taking device, described by-pass switch, described charge circuit are sequentially connected with, and the outfan of described charge circuit is in parallel with described storage capacitor; Described energy taking device gives the charging of described storage capacitor by described charge circuit under the control of described by-pass switch.
Further, storage capacitor charging monitoring part include storage capacitor charging monitoring part and storage capacitor charging control section divide; Described storage capacitor charging monitoring part is divided with described storage capacitor charging control section by Control protection system and is connected.
Further, described storage capacitor charging monitoring part includes voltage sampling unit, the first electric voltage/frequency converter and the first optical signal transmitting element, and described voltage sampling unit, described first electric voltage/frequency converter, described first optical signal transmitting element are sequentially connected with;
The input of described voltage sampling unit is in parallel with described storage capacitor, exports to described first electric voltage/frequency converter after the voltage at the described storage capacitor two ends of described voltage sampling unit collection; Described first electric voltage/frequency converter exports to the first optical signal transmitting element after the voltage signal received is converted into the pulse signal of changeable frequency, and described first optical signal transmitting element is sent to Control protection system by optical fiber after the pulse signal received is converted into optical signal.
Further, storage capacitor charging control section is divided and is included the first optical signal reception unit, described first optical signal receives unit and is made up of optical-electrical converter and power amplifier, the input of described optical-electrical converter is connected by optical fiber with the communication interface of Control protection system, its outfan is connected with the input of described power amplifier, and the outfan of described power amplifier is connected with the control end of by-pass switch;
Described optical-electrical converter receives the charging control optical signal that described Control protection system sends, and control to export to power amplifier after optical signal is converted to pulse signal by described charging, after the pulse signal received is carried out power amplification by described power amplifier, output pulse-triggered by-pass switch closes; During described by-pass switch Guan Bi, described energy taking device is bypassed, and stops storage capacitor being charged.
Preferably, described storage capacitor discharge portion includes Quick side way switch repulsive force mechanism and discharge control switch, described Quick side way switch repulsive force mechanism is in parallel with described storage capacitor after connecting with described discharge control switch, and described storage capacitor is discharged by described Quick side way switch repulsive force mechanism under the control of described discharge control switch.
Further, storage capacitor electric discharge monitor portion includes storage capacitor electric discharge monitoring part and storage capacitor control of discharge part; Described storage capacitor electric discharge monitoring part is connected with described storage capacitor control of discharge part by Control protection system.
Further, described storage capacitor electric discharge monitoring part includes current detecting unit, the second electric voltage/frequency converter and the second optical signal transmitting element, and described current detecting unit, described second electric voltage/frequency converter, described second optical signal transmitting element are sequentially connected with;
The input of described current detecting unit and described energy storage capacitor in series; described current detecting unit gathers the electric current of described storage capacitor; and export to described second electric voltage/frequency converter after described electric current is converted to voltage; described second electric voltage/frequency converter exports after the voltage signal received is converted to pulse signal to the second optical signal transmitting element, and described second optical signal transmitting element is exported to Control protection system by optical fiber after the pulse signal received is converted to optical signal.
Further, storage capacitor control of discharge part includes the second optical signal and receives unit, and described second optical signal receives unit and is made up of optical-electrical converter and power amplifier;
The input of described optical-electrical converter is connected with described Control protection system by optical fiber, and its outfan is connected with the input of described power amplifier, and the outfan of described power amplifier is connected with the control end of discharge control switch;
Described optical-electrical converter receives the control of discharge optical signal that described Control protection system sends, and exporting to power amplifier after described control of discharge optical signal is changed pulse signal, described power amplifier exports discharge control switch Guan Bi described in pulse-triggered after the pulse signal received carries out power amplification; During described discharge control switch Guan Bi, described storage capacitor discharges to Quick side way switch repulsive force mechanism.
Further, the outfan of described charge circuit is in series with diode, makes that energy is single flows to described storage capacitor from described energy taking device.
Further, described storage capacitor two ends are parallel with over-voltage protection element, and the outfan of described over-voltage protection element is connected with the control end of described by-pass switch; When described storage capacitor voltage is excessive, the output of described over-voltage protection element triggers signal and triggers described by-pass switch Guan Bi, is bypassed by described energy taking device so that it is stop storage capacitor being charged.
Preferably, described by-pass switch and described discharge control switch are off state when Triggerless.
Further, described over-voltage protection element is pressure cell or voltage comparator.
There is advantages that
1) supervisory circuit adopts optic communication form with extraneous Control protection system, not only makes remotely to control to be possibly realized, and is susceptible to complex electromagnetic environment interference;
2) accurately and rapidly FBS storage capacitor charge and discharge loop can be controlled according to distant place Control protection system order, and control just can be automatically obtained the overvoltage protection of storage capacitor without the external world;
3) can in real time FBS storage capacitor voltage and discharge loop state be monitored; status information is sent to distant place Control protection system simultaneously; solve FBS storage capacitor and associated loop fault-location problem thereof, greatly facilitate FBS and be applied to field adjustable and the maintenance of high pressure equipment overvoltage protection occasion.
Accompanying drawing explanation
Fig. 1 is the voltage monitoring circuit connection diagram with control protective unit of Quick side way switch storage capacitor provided by the invention;
The voltage monitoring circuit schematic diagram of Fig. 2 Quick side way switch storage capacitor provided by the invention.
Detailed description of the invention
In order to be more fully understood that the present invention, below in conjunction with Figure of description and example, present disclosure is described further.
As shown in Figure 1: the voltage monitoring circuit of Quick side way switch storage capacitor is connected with Control protection system; the voltage monitoring circuit of Quick side way switch storage capacitor is positioned on the equipment platform of high potential; Control protection system is positioned at ground and controls protective chamber, is connected by optical fiber therebetween.
The supervisory circuit schematic diagram of Quick side way switch storage capacitor is as shown in Figure 2:
Supervisory circuit divided by 1. storage capacitor live part, 2. storage capacitor charging control section, 3. storage capacitor charging monitoring part, 4. storage capacitor discharge portion, 5. storage capacitor control of discharge part, 6. storage capacitor electric discharge monitoring part composition.
1. storage capacitor live part includes: energy taking device-2, by-pass switch-4, charge circuit-1;
Storage capacitor is connected with energy taking device-2 by the charge circuit-1 in circuit block diagram, arranges diode, it is ensured that energy can only be flowed to storage capacitor by energy taking device-2 and cannot reflux in charge circuit-1;
The two ends parallel connection that charge circuit-1 is connected with storage capacitor both positive and negative polarity has accessed overvoltage protection element, and over-voltage protection element-3 can adopt pressure cell or voltage comparator, and this element is connected with the control pole of charge circuit-1 input by-pass switch-4. When storage capacitor voltage not yet reaches the protection voltage threshold set, there is not action in voltage protection device, charge circuit-1 is held on, and storage capacitor is in charged state; When storage capacitor voltage is excessive, voltage protection sensing element can produce discharge pulse and trigger charge circuit-1 by-pass switch-4 Guan Bi, is automatically stopped charging.
It addition, by-pass switch-4 is also by storage capacitor charging control section sub-control system; The control method of two kinds of by-pass switches is "or" logic, as long as one of which controls to occur, namely charge circuit-1 is bypassed.
2. storage capacitor charging control section is divided and is included: the first optical signal receives unit-5; First optical signal receives unit-5 and is made up of optical-electrical converter and power amplifier;
The input of described optical-electrical converter is connected by optical fiber with the communication interface of Control protection system, and its outfan is connected with the input of described power amplifier, and the outfan of described power amplifier is connected with the control end of by-pass switch-4;
The input of optical-electrical converter is connected by optical fiber with the communication interface of Control protection system, optical-electrical converter receives the charging control optical signal that Control protection system sends, and export to power amplifier after charging is controlled optical signal conversion pulse signal, power amplifier exports pulse-triggered by-pass switch-4 after the pulse signal received carries out power amplification, control by-pass switch-4 Guan Bi, during by-pass switch-4 Guan Bi, energy taking device-2 is bypassed, and stops storage capacitor being charged; When Triggerless, by-pass switch-4 remains off, and energy taking device-2 is charged to storage capacitor by charge circuit-1.
3. storage capacitor charging monitoring part includes; Voltage sampling unit-10; First electric voltage/frequency converter-6, the first optical signal transmitting element-9;
The input of voltage sampling unit-10 is in parallel with storage capacitor, exports to the first electric voltage/frequency converter-6 after the voltage at voltage sampling unit-10 collection storage capacitor two ends; First electric voltage/frequency converter-6 exports to the first optical signal transmitting element-9 after the voltage signal received is converted into the pulse signal of changeable frequency, and the first optical signal transmitting element-9 is sent to ground Control protection system by optical fiber after the pulse signal received is converted into optical signal. Control protection system is according to light frequency information analysis storage capacitor voltage status, and makes respective logic judgement, controls disconnection or the Guan Bi of by-pass switch-4.
4. storage capacitor discharge portion includes: Quick side way switch-4 repulsive force mechanism and discharge control switch-8, and discharge control switch-8 is connected with Quick side way switch-4 repulsive force mechanism; Discharge control switch-8 is by the control of storage capacitor control of discharge part, and when discharge control switch-8 closes, energy is released to Quick side way switch-4 repulsive force mechanism by storage capacitor.
5. storage capacitor control of discharge part includes: the second optical signal receives unit-13, and the second optical signal receives unit-13 and is made up of optical-electrical converter and power amplifier;
The input of optical-electrical converter is connected with Control protection system by optical fiber, and its outfan is connected with power amplifier, and the outfan of power amplifier is connected with the input of discharge control switch-8;
Optical-electrical converter receives the control of discharge optical signal that Control protection system sends; and export to power amplifier after control of discharge optical signal is changed pulse signal; after the pulse signal received is carried out power amplification by power amplifier, output pulse-triggered discharge control switch-8 closes; complete energy by the storage capacitor release to Quick side way switch-4 repulsive force mechanism; when Triggerless, discharge control switch-8 remains off-state.
6. storage capacitor electric discharge monitoring part includes: current detecting unit-7, the second electric voltage/frequency converter-11, the second optical signal transmitting element-12;
The input of current detecting unit-7 and energy storage capacitor in series; current detecting unit-7 gathers the electric current of storage capacitor; and export after converting electrical current into voltage to the second electric voltage/frequency converter-11; second electric voltage/frequency converter-11 exports after the voltage signal received is converted to pulse signal to the second optical signal transmitting element-12; second optical signal transmitting element-12 exports to Control protection system by optical fiber after the pulse signal received is converted to the optical signal of changeable frequency, returns inspection as discharge loop state.
Wherein by-pass switch-4 and discharge control switch-8 are made up of the power electronic devices such as IGCT, IGBT.
These are only embodiments of the invention, be not limited to the present invention, all within the spirit and principles in the present invention, any amendment of making, equivalent replacements, improvement etc., all applying within the scope of the presently claimed invention awaited the reply.
Claims (13)
1. the voltage monitoring circuit of a Quick side way switch storage capacitor, it is characterised in that: described supervisory circuit includes storage capacitor live part, storage capacitor charging monitoring part, storage capacitor discharge portion and storage capacitor electric discharge monitor portion; Described storage capacitor live part is connected with storage capacitor by charge circuit; Described storage capacitor charging monitoring part is connected with described storage capacitor by voltage sampling unit, and is connected with described storage capacitor live part by by-pass switch; Described storage capacitor discharge portion is connected with described storage capacitor by Quick side way switch repulsive force mechanism; Described storage capacitor electric discharge monitor portion is connected with described storage capacitor by current detecting unit, and is connected with described storage capacitor discharge portion by discharge control switch; Described by-pass switch and described discharge control switch are IGCT or IGBT.
2. the voltage monitoring circuit of a kind of Quick side way switch storage capacitor as claimed in claim 1, it is characterised in that: described storage capacitor live part includes energy taking device, by-pass switch and charge circuit; Described energy taking device, described by-pass switch, described charge circuit are sequentially connected with, and the outfan of described charge circuit is in parallel with described storage capacitor; Described energy taking device gives the charging of described storage capacitor by described charge circuit under the control of described by-pass switch.
3. the voltage monitoring circuit of a kind of Quick side way switch storage capacitor as claimed in claim 2, it is characterised in that:
Storage capacitor charging monitoring part includes storage capacitor charging monitoring part and storage capacitor charging control section is divided; Described storage capacitor charging monitoring part is divided with described storage capacitor charging control section by Control protection system and is connected.
4. the voltage monitoring circuit of a kind of Quick side way switch storage capacitor as claimed in claim 3, it is characterised in that:
Described storage capacitor charging monitoring part includes voltage sampling unit, the first electric voltage/frequency converter and the first optical signal transmitting element, and described voltage sampling unit, described first electric voltage/frequency converter, described first optical signal transmitting element are sequentially connected with;
The input of described voltage sampling unit is in parallel with described storage capacitor, exports to described first electric voltage/frequency converter after the voltage at the described storage capacitor two ends of described voltage sampling unit collection; Described first electric voltage/frequency converter exports to the first optical signal transmitting element after the voltage signal received is converted into the pulse signal of changeable frequency, and described first optical signal transmitting element is sent to Control protection system by optical fiber after the pulse signal received is converted into optical signal.
5. the voltage monitoring circuit of a kind of Quick side way switch storage capacitor as claimed in claim 4, it is characterised in that:
Storage capacitor charging control section is divided and is included the first optical signal reception unit, described first optical signal receives unit and is made up of optical-electrical converter and power amplifier, the input of described optical-electrical converter is connected by optical fiber with the communication interface of Control protection system, its outfan is connected with the input of described power amplifier, and the outfan of described power amplifier is connected with the control end of by-pass switch;
Described optical-electrical converter receives the charging control optical signal that described Control protection system sends, and control to export to power amplifier after optical signal is converted to pulse signal by described charging, after the pulse signal received is carried out power amplification by described power amplifier, output pulse-triggered by-pass switch closes; During described by-pass switch Guan Bi, described energy taking device is bypassed, and stops storage capacitor being charged.
6. the voltage monitoring circuit of a kind of Quick side way switch storage capacitor as claimed in claim 1, it is characterised in that:
Described storage capacitor discharge portion includes Quick side way switch repulsive force mechanism and discharge control switch, described Quick side way switch repulsive force mechanism is in parallel with described storage capacitor after connecting with described discharge control switch, and described storage capacitor is discharged by described Quick side way switch repulsive force mechanism under the control of described discharge control switch.
7. the voltage monitoring circuit of a kind of Quick side way switch storage capacitor as claimed in claim 6, it is characterised in that:
Storage capacitor electric discharge monitor portion includes storage capacitor electric discharge monitoring part and storage capacitor control of discharge part; Described storage capacitor electric discharge monitoring part is connected with described storage capacitor control of discharge part by Control protection system.
8. the voltage monitoring circuit of a kind of Quick side way switch storage capacitor as claimed in claim 7, it is characterised in that:
Described storage capacitor electric discharge monitoring part includes current detecting unit, the second electric voltage/frequency converter and the second optical signal transmitting element, and described current detecting unit, described second electric voltage/frequency converter, described second optical signal transmitting element are sequentially connected with;
The input of described current detecting unit and described energy storage capacitor in series; described current detecting unit gathers the electric current of described storage capacitor; and export to described second electric voltage/frequency converter after described electric current is converted to voltage; described second electric voltage/frequency converter exports after the voltage signal received is converted to pulse signal to the second optical signal transmitting element, and described second optical signal transmitting element is exported to Control protection system by optical fiber after the pulse signal received is converted to optical signal.
9. the voltage monitoring circuit of a kind of Quick side way switch storage capacitor as claimed in claim 8, it is characterised in that:
Storage capacitor control of discharge part includes the second optical signal and receives unit, and described second optical signal receives unit and is made up of optical-electrical converter and power amplifier;
The input of described optical-electrical converter is connected with described Control protection system by optical fiber, and its outfan is connected with the input of described power amplifier, and the outfan of described power amplifier is connected with the control end of discharge control switch;
Described optical-electrical converter receives the control of discharge optical signal that described Control protection system sends, and exporting to power amplifier after described control of discharge optical signal is changed pulse signal, described power amplifier exports discharge control switch Guan Bi described in pulse-triggered after the pulse signal received carries out power amplification; During described discharge control switch Guan Bi, described storage capacitor discharges to Quick side way switch repulsive force mechanism.
10. the voltage monitoring circuit of a kind of Quick side way switch storage capacitor as claimed in claim 2, it is characterised in that:
The outfan of described charge circuit is in series with diode, makes that energy is single flows to described storage capacitor from described energy taking device.
11. the voltage monitoring circuit of a kind of Quick side way switch storage capacitor as claimed in claim 2, it is characterised in that:
Described storage capacitor two ends are parallel with over-voltage protection element, and the outfan of described over-voltage protection element is connected with the control end of described by-pass switch; When described storage capacitor voltage is excessive, the output of described over-voltage protection element triggers signal and triggers described by-pass switch Guan Bi, is bypassed by described energy taking device so that it is stop storage capacitor being charged.
12. the voltage monitoring circuit of a kind of Quick side way switch storage capacitor as claimed in claim 1, it is characterised in that:
Described by-pass switch and described discharge control switch are off state when Triggerless.
13. the voltage monitoring circuit of a kind of Quick side way switch storage capacitor as claimed in claim 11, it is characterised in that:
Described over-voltage protection element is pressure cell or voltage comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410665538.4A CN105656101A (en) | 2014-11-19 | 2014-11-19 | Voltage monitoring circuit of energy storage capacitor of quick bypass switch |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410665538.4A CN105656101A (en) | 2014-11-19 | 2014-11-19 | Voltage monitoring circuit of energy storage capacitor of quick bypass switch |
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| CN105656101A true CN105656101A (en) | 2016-06-08 |
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| CN201410665538.4A Pending CN105656101A (en) | 2014-11-19 | 2014-11-19 | Voltage monitoring circuit of energy storage capacitor of quick bypass switch |
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Cited By (4)
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| CN109378831A (en) * | 2018-12-25 | 2019-02-22 | 思源清能电气电子有限公司 | A kind of control device and control method for SVG equipment by-pass switch |
| CN112531902A (en) * | 2020-12-09 | 2021-03-19 | 广东电网有限责任公司 | Join in marriage net direct current breaker repulsion switch drive unit on-line status monitoring device |
| CN113740725A (en) * | 2021-09-09 | 2021-12-03 | 广东电网有限责任公司 | Method and device for monitoring state of driving unit of repulsion switch |
| CN114977504A (en) * | 2022-06-02 | 2022-08-30 | 国网山东省电力公司泰安供电公司 | Bypass load switch control system |
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| CN109378831A (en) * | 2018-12-25 | 2019-02-22 | 思源清能电气电子有限公司 | A kind of control device and control method for SVG equipment by-pass switch |
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| CN112531902A (en) * | 2020-12-09 | 2021-03-19 | 广东电网有限责任公司 | Join in marriage net direct current breaker repulsion switch drive unit on-line status monitoring device |
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| CN114977504A (en) * | 2022-06-02 | 2022-08-30 | 国网山东省电力公司泰安供电公司 | Bypass load switch control system |
| CN114977504B (en) * | 2022-06-02 | 2023-10-24 | 国网山东省电力公司泰安供电公司 | Bypass load switch control system |
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