CN209805421U - Switch connecting circuit suitable for low-voltage compensation voltage regulating device - Google Patents
Switch connecting circuit suitable for low-voltage compensation voltage regulating device Download PDFInfo
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- CN209805421U CN209805421U CN201920854084.3U CN201920854084U CN209805421U CN 209805421 U CN209805421 U CN 209805421U CN 201920854084 U CN201920854084 U CN 201920854084U CN 209805421 U CN209805421 U CN 209805421U
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- latching relay
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Abstract
The utility model relates to a switch connecting circuit suitable for low pressure compensation regulator, including a compensation transformer who takes a percentage in the area, its characteristics are, still including at least a set of magnetic latching relay who has the changeover contact structure, the magnetic latching relay who has the changeover contact structure is connected with a compensation transformer who takes a percentage. The magnetic latching relay with the switching contact structure is connected with the tapped compensation transformer to realize the natural compensation of the power supply of the load without power failure, obtain stable voltage output and meet the power consumption requirements of users.
Description
Technical Field
The utility model relates to an electric energy quality technical field, concretely relates to switch connecting circuit suitable for low pressure compensation regulator.
background
At present, the standard voltage of the commercial power in China is alternating current: at 50Hz and 220V, the civil load can work normally under the voltage, and the 220V is output through a transformer and transmitted to a user through a power grid for use. If a user is at the end of a power grid, especially in a remote rural area, electric energy is converted into heat energy and energy loss in other forms in a circuit in the transmission process, so that the phenomenon that the voltage is lower than the standard voltage occurs when the electric energy is transmitted to the end of the power grid, a boosting device matched with the electric energy is usually installed at the end or in the middle of the power grid to boost the end or the middle voltage, and the following technologies are adopted in the conventional compensation boosting device:
(1) The voltage can be increased by using an overcompensation principle through a compensation mode of putting capacitors into a power grid in parallel, but the mode can increase the reactive power value in the power grid and reduce the power factor of the power grid. The compensation voltage has other influences on the power grid at the same time. The compensation efficiency of the over-compensation mode of the capacitor is low, and the compensation effect is not obvious;
(2) With the development of science and technology, the boost voltage can form inverter circuit through the IGBT transistor and adjust the terminal voltage of electric wire netting, though can promote the voltage of electric wire netting to some extent, its safety and stability is poor, efficient, the consumption is big, with high costs, shortcomings such as life-span are exposed gradually in-service use. Especially, when the next stage power utilization is in short circuit fault, the internal core element IGBT is possibly burnt out, and irreversible results are caused. This solution is extremely rare in practical applications;
(3) The voltage compensation is carried out by switching a tap on the primary side of the compensation transformer by combining the tapped compensation transformer with a quick contactor, the primary side of the compensation transformer and the winding turn number relation of a secondary side are changed according to the principle of the voltage compensation transformer, so that the voltage value output by the secondary side is changed according to the voltage superposition principle to complete the adjustment of the voltage, however, the driving circuit is complex in the mode, the safety and reliability are low, the fluctuation of the output voltage can be caused by the jitter when the contactor acts, even subordinate electric equipment is burnt, the protection measures of the circuit mode are generally controlled by software programs, and the winding of a voltage device can be caused to be short-circuited if the hardware has a fault phenomenon, and unnecessary economic loss and serious consequences are caused. And in equipment operation, the quick contactor can keep the current pull-in state only through certain continuous current, so the waste of electric energy is generated, the power consumption of the equipment is increased, if the coil in the quick contactor operates for a long time, certain heat energy can be generated, and the service life of the quick contactor is shortened.
disclosure of Invention
the utility model aims at overcoming prior art's shortcoming, providing a simple structure, the reliability is high, the low power dissipation, interference immunity is strong, with low costs, need not artifical maintenance, switching process does not have the outage, does not have the switch connecting circuit who gushes class, does not have the shake and is applicable to low pressure compensation regulator.
Realize the utility model discloses the technical scheme that the purpose adopted is, a switch connecting circuit suitable for low pressure compensation regulator, it includes a compensation transformer that takes a percentage, characterized by still includes at least a set of magnetic latching relay who has the changeover contact structure, magnetic latching relay who has the changeover contact structure be connected with a compensation transformer that takes a percentage.
The utility model discloses a switch connecting circuit suitable for low pressure compensation regulator is connected with a compensating transformer that has the tap formula owing to adopt at least a set of magnetic latching relay that has the changeover contact structure to be connected and just can realize carrying out no outage natural compensation to the power supply of load, obtains stable voltage output, satisfies the requirement of user's power consumption, has simple structure, and the reliability is high, and the low power dissipation, interference immunity is strong, and is with low costs, need not the manual maintenance, and the switching process does not have the outage, does not have and shoves, does not have advantages such as shake.
Drawings
fig. 1 is a schematic diagram of a switch connection circuit suitable for a low-voltage compensation voltage-regulating device in embodiment 1;
Fig. 2 is a flow chart of the operation of a switch connection circuit suitable for a low-voltage compensation voltage-regulating device in embodiment 1;
Fig. 3 is a schematic diagram of a switch connection circuit suitable for a low-voltage compensation voltage regulator according to embodiment 2;
Fig. 4 is a flowchart of the operation of a switch connection circuit suitable for a low-voltage compensation voltage regulator according to embodiment 2.
In the figure: the magnetic latching relay with the conversion contact structure is a single-pole double-throw magnetic latching relay which is respectively KA1, KA2, KA3 and KA 4; a tapped compensation transformer T.
Detailed Description
the present invention will be further explained with reference to the drawings and examples.
Example 1: referring to fig. 1, in the switch connection circuit suitable for the low-voltage compensation voltage-regulating device of embodiment 1, the single-pole double-throw magnetic latching relays KA1 and KA2 respectively include three contacts, namely, a common contact, a normally closed contact (i) and a normally open contact (i); the contact of the single-pole double-throw magnetic latching relay KA1 in the circuit is connected with the incoming line of a power supply and is connected with a tap of a secondary side of a compensation transformer T with a tap, the contact of the single-pole double-throw magnetic latching relay KA1 in the circuit is connected with a tap of a secondary side of the compensation transformer T with a tap and is connected with the outgoing line, and the contact of the single-pole double-throw magnetic latching relay KA1 and the contact of the single-pole double-throw magnetic latching relay KA2 are connected; the third point of the single-pole double-throw magnetic latching relay KA2 is connected with the third point of the single-pole double-throw magnetic latching relay KA1, the third point of the single-pole double-throw magnetic latching relay KA2 is connected with the first point of the primary side tap of the compensation transformer T with the tap, the third point of the single-pole double-throw magnetic latching relay KA2 is connected with the first point of the primary side tap of the compensation transformer T with the tap, and the third point of the primary side tap of the compensation transformer T with the tap is connected with the zero line of the circuit. The circuit is divided into three working modes, which are respectively defined as a bypass mode, a low compensation mode and a high compensation mode, and are respectively suitable for three different field working conditions, the bypass mode has two conditions, one of the two conditions is suitable for a compensation control system of the circuit, the incoming line voltage of the circuit is detected to meet the power supply standard voltage requirement of a load side, and the compensation is not needed, and the circuit is switched into the bypass mode; secondly, a compensation control system suitable for the circuit detects that the incoming line voltage of the circuit exceeds (is lower than or higher than) the operating condition of the low-voltage compensation voltage regulating device, and if the incoming line voltage cannot be compensated, the circuit is switched into a bypass mode; the low compensation mode is suitable for the compensation control system of the circuit to detect that the incoming line voltage is in a slight undervoltage state and does not meet the operation of a load, and the system switches the circuit into the low compensation mode; the high compensation mode is suitable for the phenomenon that the compensation control system detects that the incoming line voltage is in serious undervoltage, and the circuit is switched into the high compensation mode if the operation of the load is not met completely.
Bypass mode: the normally closed contacts of the first pole and the second pole of the single-pole double-throw magnetic latching relay KA1 are closed, the incoming line and the outgoing line form a passage directly, and voltage compensation is not needed to be carried out through a compensation transformer T with a tap. At this time, since the third and the fourth of KA1 are in the disconnected state, KA2 does not work.
Low compensation mode: the normally open contact of the single-pole double-throw magnetic latching relay KA1 is closed, the incoming line is connected with the point (r) of a compensation transformer T with a tap through connection, and the incoming line passes through the point (r) of the single-pole double-throw magnetic latching relay KA1 and the point (r) of the single-pole double-throw magnetic latching relay KA2 and the point (r) of the single-pole double-throw magnetic latching relay KA1 to be connected. At this time, the single-pole double-throw magnetic latching relay KA2 is a decision relay for deciding a low compensation mode and a high compensation mode, if the normally closed contacts of the first and second poles of the single-pole double-throw magnetic latching relay KA2 are closed, the incoming line passes through the contacts of the single-pole double-throw magnetic latching relay KA1 and the single-pole double-throw magnetic latching relay KA2 to be connected with the first tap of a compensation transformer T with a tap, and the compensation transformer T with the tap works in the low compensation mode. The outgoing line voltage is the compensation voltage of the primary side, which is induced into a voltage of the secondary side by electromagnetism and is added with the inherent incoming line voltage value of the secondary side.
High compensation mode: the normally open contact of the single-pole double-throw magnetic latching relay KA1 is closed, the incoming line is connected with the point (r) of a compensation transformer T with a tap through connection, and the incoming line passes through the point (r) of the single-pole double-throw magnetic latching relay KA1 and the point (r) of the single-pole double-throw magnetic latching relay KA2 and the point (r) of the single-pole double-throw magnetic latching relay KA1 to be connected. At the moment, the single-pole double-throw magnetic latching relay KA2 is a decision relay for deciding a low compensation mode and a high compensation mode, if the normally open contact of the first pole and the third pole of the single-pole double-throw magnetic latching relay KA2 is closed, the inlet wire passes through the contacts of the single-pole double-throw magnetic latching relay KA1 and the single-pole double-throw magnetic latching relay KA2 to be connected with the second pole of the compensation transformer T with a tap, and the compensation transformer T with the tap works in the high compensation mode. The outgoing line voltage is the compensation voltage of the primary side, which is induced into a voltage of the secondary side by electromagnetism and is added with the inherent incoming line voltage value of the secondary side. The circuit is characterized in that the low-voltage compensation and voltage regulation device can determine which working mode to work through internal program or external instruction control, wireless networks such as 433M LORA or ZIGBEE of the low-voltage compensation and voltage regulation device can freely perform networking operation with a main controller or other controllers, and unified control operation of a plurality of phase change switching devices is realized. And the GPRS public wireless network can be accessed to the Internet to realize remote monitoring. The circuit is characterized in that two or more groups of magnetic latching relays with switching contact structures are adopted, namely two or more groups of single-pole double-throw magnetic latching relays are connected with a compensation transformer T with a tap, when the single-pole double-throw magnetic latching relays are in failure, no matter what state the single-pole double-throw magnetic latching relays stay, the phenomenon that a compensation transformer T with a tap is in a short circuit cannot be caused, the circuit belongs to a very safe locking structure, and the defects of a traditional circuit are overcome.
Referring to fig. 2, the switch connection circuit suitable for the low-voltage compensation voltage regulation device of embodiment 1 adopts the low-voltage compensation voltage regulation device of the prior art, creatively designs the switch connection circuit connected therewith, has three working modes, and the main working mode that the reasonable switching of the voltage condition according to the inlet wire corresponds, and its work flow is: low pressure compensation regulator initializes the system at first, and the controller through low pressure compensation regulator analyzes the voltage data of the inlet wire that voltage transformer gathered, then makes the selection judgement, at first judges whether satisfy the executive condition of procedure in the low pressure compensation regulator, also whether present inlet wire voltage can reach promptly the utility model discloses a switch connecting circuit operating condition describes, if reach operating condition, then low pressure compensation regulator control single-pole double-throw magnetism keeps relay KA 1's normally open contact closed, and normally closed contact disconnection, the system converts operating condition into from the bypass state, and meanwhile control single-pole double-throw magnetism keeps relay KA 2's normally closed contact is closed, and the low compensation mode that the circuit just got into like this. Secondly, if the voltage of the incoming line does not meet the operation condition of the low-voltage compensation voltage-regulating device, the system keeps a bypass mode, namely a single-pole double-throw magnetic latching relay KA1 keeps a normally closed contact closed.
When the system is in a low compensation mode, the low-voltage compensation voltage regulating device continuously detects the voltage of the incoming line, if the voltage of the incoming line meets the state of a high compensation mode, the low-voltage compensation voltage regulating device controls the single-pole double-throw magnetic latching relay KA1 to keep a normally open contact closed, and controls the normally closed contact of the single-pole double-throw magnetic latching relay KA2 to be opened and the normally open contact to be closed, and at the moment, the circuit works in the high compensation mode; the circuit has the advantages that the system detects the voltage of the incoming line at any time, if any operation condition is met, the low-voltage compensation and voltage regulation device rapidly switches the circuit to a corresponding control mode in an instruction issuing mode, if the operation condition of the low-voltage compensation and voltage regulation device is not met, the low-voltage compensation and voltage regulation device converts the circuit into a bypass mode, a normally open contact of the single-pole double-throw magnetic latching relay KA1 is disconnected, the normally closed contact is closed, the circuit is switched circularly, the voltage value of the outgoing line is dynamically compensated and regulated, and the stability of the power consumption of the load connected with the outgoing line is guaranteed.
Example 2: referring to fig. 3, in the switch connection circuit suitable for the low-voltage compensation voltage regulator of embodiment 2, a compensation transformer T with 7 taps is used to cooperate with two sets of four single-pole double-throw magnetic latching relays KA1, KA2, KA3 and KA4, so as to realize five compensation modes, namely, a bypass mode, a low compensation mode, a high compensation mode, a low voltage reduction mode and a high voltage reduction mode, and the voltage boosting and voltage reduction is realized by changing taps on the primary side of the compensation transformer with taps according to the magnetic latching relays with the switching contact structure, that is, the single-pole double-throw magnetic latching relays change the taps on the primary side of the compensation transformer with taps to realize the voltage boosting and voltage reduction.
Referring to fig. 3 and 4, a switch connection circuit suitable for a low-voltage compensation voltage regulator in embodiment 2 is divided into five working modes, which are respectively defined as a bypass mode, a low compensation mode, a high compensation mode, a low voltage reduction mode and a high voltage reduction mode, and are respectively suitable for five different field working conditions, the bypass mode has two conditions, one of which is suitable for a compensation control system of the circuit, detects that the incoming line voltage of the circuit meets the power supply standard voltage requirement of a load side, and if compensation is not needed, the circuit is switched into the bypass mode; secondly, a compensation control system suitable for the circuit detects that the incoming line voltage of the circuit exceeds (is lower than or higher than) the operating condition of the low-voltage compensation voltage regulating device, and if the incoming line voltage cannot be compensated, the circuit is switched into a bypass mode; the low compensation mode is suitable for the compensation control system of the circuit to detect that the incoming line voltage is in a slight undervoltage state and does not meet the operation of a load, and the system switches the circuit into the low compensation mode; the high compensation mode is suitable for the phenomenon that the compensation control system detects that the incoming line voltage is in serious undervoltage, and if the incoming line voltage does not meet the operation of the load completely, the circuit is switched into the high compensation mode; the low voltage reduction mode is suitable for a compensation control system of the circuit to detect that the incoming line voltage is in a slight overvoltage state, and the system switches the circuit into the low voltage reduction mode; the high voltage reduction mode is suitable for a compensation control system of the circuit to detect that the incoming line voltage is in a serious overvoltage state, and then the system switches the circuit into the high voltage reduction mode.
Bypass mode: the normally closed contacts of the first pole and the second pole of the single-pole double-throw magnetic latching relay KA1 are closed, the incoming line and the outgoing line form a passage directly, and voltage compensation is not needed to be carried out through a compensation transformer T with a tap. At this time, since the third and the fourth of the single-pole double-throw magnetic latching relay KA1 are in an off state, the single-pole double-throw magnetic latching relay KA2 does not work.
Low compensation mode: the normally open contact of the single-pole double-throw magnetic latching relay KA1 is closed, the incoming line is connected with the tap of the compensation transformer T with a tap through connection, and the incoming line passes through the first contact of the single-pole double-throw magnetic latching relay KA1 and the third contact of the single-pole double-throw magnetic latching relay KA2 and the third contact of the single-pole double-throw magnetic latching relay KA 1. At this time, the single-pole double-throw magnetic latching relay KA2 is a relay for selecting two modes of voltage boosting and voltage reducing. The first point and the second point of the single-pole double-throw magnetic latching relay KA2 are closed, the circuit enters a boosting mode, the single-pole double-throw magnetic latching relay KA3 is a selective relay for determining a low compensation mode and a high compensation mode, if the first point and the second point of the single-pole double-throw magnetic latching relay KA3 are closed, an incoming line passes through the single-pole double-throw magnetic latching relays KA1, KA2 and KA3 to be connected with the first tap of a compensation transformer T with a tap, and the compensation transformer T with the tap works in the low compensation mode. The outgoing line voltage is the compensation voltage of the primary side, which is induced into a voltage of the secondary side by electromagnetism and is added with the inherent incoming line voltage value of the secondary side.
High compensation mode: the normally open contact of the single-pole double-throw magnetic latching relay KA1 is closed, the incoming line is connected with the tap of the compensation transformer with a tap through connection, and the incoming line passes through the first contact of the single-pole double-throw magnetic latching relay KA1 and the third contact of the single-pole double-throw magnetic latching relay KA2 and the third contact of the single-pole double-throw magnetic latching relay KA 1. At this time, the single-pole double-throw magnetic latching relay KA2 is a relay for selecting two modes of voltage boosting and voltage reducing. The first point and the second point of the single-pole double-throw magnetic latching relay KA2 are closed, the circuit enters a boosting mode, the single-pole double-throw magnetic latching relay KA3 is a selective relay for determining a low compensation mode and a high compensation mode, if the first point and the third point of the single-pole double-throw magnetic latching relay KA3 are closed, incoming wires pass through the single-pole double-throw magnetic latching relays KA1, KA2 and KA3 to be connected with the second point of a compensation transformer T with a tap, and the compensation transformer T with the tap works in the high compensation mode. The outgoing line voltage is the compensation voltage of the primary side, which is induced into a voltage of the secondary side by electromagnetism and is added with the inherent incoming line voltage value of the secondary side.
Low dropout mode: the normally open contact of the single-pole double-throw magnetic latching relay KA1 is closed, the incoming line is connected with the tap of the compensation transformer T with a tap through connection, and the incoming line passes through the first contact of the single-pole double-throw magnetic latching relay KA1 and the third contact of the single-pole double-throw magnetic latching relay KA2 and the third contact of the single-pole double-throw magnetic latching relay KA 1. At this time, the single-pole double-throw magnetic latching relay KA2 is a relay for selecting two modes of voltage boosting and voltage reducing. The circuit enters a voltage reduction mode, the single-pole double-throw magnetic latching relay KA2 is a selective relay for determining a low voltage reduction mode and a high voltage reduction mode, if the point I and the point III of the single-pole double-throw magnetic latching relay KA4 are closed, the incoming line passes through the single-pole double-throw magnetic latching relays KA1, KA2 and KA4 to be connected with a tap IV of a compensation transformer T with a tap, and the compensation transformer T with the tap works in the low voltage reduction mode. The outgoing line voltage is the voltage of the primary side compensated voltage induced to the secondary side by electromagnetism and is subtracted from the inherent incoming line voltage value of the secondary side.
High pressure reduction mode: the normally open contact of the single-pole double-throw magnetic latching relay KA1 is closed, the incoming line is connected with the tap of the compensation transformer T with a tap through connection, and the incoming line passes through the first contact of the single-pole double-throw magnetic latching relay KA1 and the third contact of the single-pole double-throw magnetic latching relay KA2 and the third contact of the single-pole double-throw magnetic latching relay KA 1. At this time, the single-pole double-throw magnetic latching relay KA2 is a relay for selecting two modes of voltage boosting and voltage reducing. The circuit enters a voltage reduction mode, the single-pole double-throw magnetic latching relay KA2 is a selective relay for determining a low voltage reduction mode and a high voltage reduction mode, if the first point and the second point of the single-pole double-throw magnetic latching relay KA4 are closed, the incoming line passes through the single-pole double-throw magnetic latching relays KA1, KA2 and KA4 to be connected with a tap of a compensation transformer T with a tap, and the compensation transformer T with the tap works in the high voltage reduction mode. The outgoing line voltage is the voltage of the primary side compensated voltage induced to the secondary side by electromagnetism and is subtracted from the inherent incoming line voltage value of the secondary side.
Low compensation mode changes to high compensation mode: only the single-pole double-throw magnetic latching relays KA1 and KA2 need to be kept in a boosting state, the first contact and the third contact of the single-pole double-throw magnetic latching relay KA3 are disconnected, the first contact and the second contact of the single-pole double-throw magnetic latching relay KA3 are switched to be closed, and vice versa.
The low-voltage reduction mode is changed into a high-voltage reduction mode: only the single-pole double-throw magnetic latching relays KA1 and KA2 need to be kept in a voltage reduction state, the first contact and the third contact of the single-pole double-throw magnetic latching relay KA4 are disconnected, the first contact and the second contact of the single-pole double-throw magnetic latching relay KA4 are switched to be closed, and vice versa.
The circuit can drive the magnetic latching relay with a conversion contact structure through a low-voltage compensation voltage regulating device, namely, the single-pole double-throw magnetic latching relay acts, and the magnetic latching relay is switched and switched among five working modes, namely a bypass mode, a low compensation mode, a high compensation mode, a low voltage reduction mode and a high voltage reduction mode, the time sequence is strictly kept in each action, the magnetic latching relay with the conversion contact structure in the design does not cause any interference and influence on the output voltage within a half period of a mains supply waveform from the time of switching action to the time of finishing the action, and the circuit design forms a switch locking mode, the short circuit phenomenon can not occur under any condition, the magnetic latching relay has extremely high safety and reliability, the adopted magnetic latching relay with the conversion contact structure can consume electric energy only when acting, the existing state is kept by an internal mechanical structure after the action is finished, and no energy is consumed, so the power consumption of the circuit is low.
The utility model discloses a switch connecting circuit suitable for low pressure compensation regulator still can expand, and the application more single-pole double-throw magnetic latching relay corresponds the switching to taking a percentage of corresponding a compensation transformer of taking a percentage, realizes more compensation modes.
The utility model relates to a switch connecting circuit suitable for low pressure compensation regulator has creative technical scheme to lie in the constitution of switch connecting circuit. The related software program belongs to the prior art, and the software program is programmed according to C language, is a technology familiar to those skilled in the art, and is not the technical scheme of the invention.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.
Claims (1)
1. a switch connecting circuit suitable for a low-voltage compensation voltage regulating device comprises a compensation transformer with a tap and is characterized by further comprising at least one group of magnetic latching relays with switching contact structures, wherein the magnetic latching relays with the switching contact structures are connected with the compensation transformer with the tap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920854084.3U CN209805421U (en) | 2019-06-07 | 2019-06-07 | Switch connecting circuit suitable for low-voltage compensation voltage regulating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920854084.3U CN209805421U (en) | 2019-06-07 | 2019-06-07 | Switch connecting circuit suitable for low-voltage compensation voltage regulating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209805421U true CN209805421U (en) | 2019-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920854084.3U Expired - Fee Related CN209805421U (en) | 2019-06-07 | 2019-06-07 | Switch connecting circuit suitable for low-voltage compensation voltage regulating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209805421U (en) |
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2019
- 2019-06-07 CN CN201920854084.3U patent/CN209805421U/en not_active Expired - Fee Related
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