CN110970864A - Voltage detection delay automatic reclosing control method and circuit - Google Patents
Voltage detection delay automatic reclosing control method and circuit Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
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Abstract
A voltage detection time delay automatic reclosing control method and a circuit are used for monitoring the voltage state of a main loop of a universal circuit breaker and controlling the opening and closing of a frame circuit breaker, the control circuit, an under-voltage tripper and a closing electromagnet are simple and easy to use, and the function of automatic resetting of the universal circuit breaker with an under-voltage protection function after no voltage recovery can be realized only by adding a control module and based on an original frame circuit breaker accessory.
Description
Technical Field
The invention belongs to the technical field of low-voltage electric appliances, and particularly relates to a method and a circuit for controlling automatic reclosing by detecting voltage delay.
Background
With the development of society and economy, the status of electric power systems in national economy becomes more and more important. People have more and more large demand on electric power, and the electric power industry is promoted to develop rapidly, including the utilization of new energy. In recent years, the country pays special attention to the construction of a photovoltaic power station system, and promotes the grid connection of a large number of photovoltaic power stations, so that the voltage grade of the national grid is improved, the installed capacity is increased, the requirements of users on the power supply quality and the power supply reliability are higher and higher, the requirements of the system on the operation reliability of power equipment are higher and higher, and higher requirements are provided for the monitoring and diagnosis technology of the power equipment.
In order to protect the safe work between the power grid and the photovoltaic power station and ensure the convenience of users, the photovoltaic power station needs to realize the automatic tripping of the undervoltage/no-voltage system and the automatic closing after the voltage is detected. Therefore, the safety of equipment and the stability of a power grid can be ensured, and the manpower maintenance cost can be reduced.
Chinese patent ZL201510295712.5 discloses a distributed photovoltaic grid-connected intelligent protector with automatic closing function of detecting pressure, it includes electric operating mechanism, time delay module, under-voltage module, closing control module and circuit breaker, electric operating mechanism includes power and control circuit, the P1 of power with closing control module ' S P1 is connected, the P2 and the zero line N of power are connected, control circuit ' S1, S2, S3 respectively with closing control module ' S COM, ON, OFF are connected, electric operating mechanism control is under-voltage time delay. The protector is used between a photovoltaic power station system and a low-voltage side of a mains supply, has the function of automatic switch-on under voltage detection, can protect equipment safety and power grid stability, and is convenient to overhaul when tripping automatically under the condition of voltage loss. However, the technical solution disclosed in this patent only judges the current voltage of the main circuit for the reclosing operation, and the voltage is normally closed, which is a disadvantage of this protection method is that the reclosing operation may be executed under the condition of non-under-voltage tripping (for example, manual opening, short-circuit tripping, overload tripping), which may cause an electric shock to the maintainer or a burn-out of the lower-level device due to continuous short-circuit/overload.
Disclosure of Invention
The invention aims to provide a method and a circuit for controlling automatic reclosing by detecting pressure delay, aiming at the defects of the prior art, which are used for monitoring the voltage state of a main loop of a universal circuit breaker and controlling the opening and closing of a frame circuit breaker and solving the potential safety hazard that only voltage judgment is carried out before closing products detecting pressure in the current market. The universal circuit breaker with the under-voltage protection function can realize the automatic reset function after no-voltage recovery based on the original frame circuit breaker accessories by only adding a control module and by using a control circuit, an under-voltage release and a closing electromagnet, and is simple and easy to use.
Technical scheme
In order to achieve the technical purpose of appeasing, the patent provides a pressure detection delay automatic reclosing control method, which is characterized by comprising the following steps:
(1) detecting that a voltage delay automatic reclosing module is powered on and started up and carrying out initialization operation;
(2) sampling the voltage of a main loop and the state of a circuit breaker and analyzing the acquired data;
(3) outputting signals according to the data analysis result in the step (2);
(4) the control operation is carried out when the output signal is in an under-voltage maintaining state and a pull-in state;
(5) and when the output signal is in a reclosing state, performing control operation.
Wherein, the process of the control operation in the step (4) when the output signal is under-voltage maintaining and attracting state is as follows:
(a) judging whether the lamp is in an undervoltage state, if so, putting the lamp in the undervoltage state; checking whether the voltage reaches a reset voltage, if so, entering a delay state, and setting a reset delay time;
(b) judging whether the voltage is in a delay state, if so, in the reset delay time, if the voltage is continuously on the reset voltage, entering an action delay state, and performing action under-voltage keeping drive and under-voltage action drive, otherwise, returning to the under-voltage state;
(c) judging whether the operation is in an action delay state, if so, closing the undervoltage action drive after the action delay time is over, and entering a holding state;
(d) judging whether the input voltage is in a holding state, if so, detecting whether the input voltage reaches an undervoltage or voltage loss state, and if so, entering an undervoltage and voltage loss detection delay state;
(e) judging whether the input voltage is in an undervoltage detection delay state, if so, detecting whether the input voltage continuously reaches the undervoltage and undervoltage state, entering the undervoltage action state when the duration time is up, and entering the holding state when the voltage is recovered before the duration time is up;
(f) and judging whether the frame tripping mechanism is in an undervoltage action state, if so, continuously judging whether the preset tripping time is reached, if the circuit breaker is successfully switched from closing to tripping, and if so, recording the tripping of the frame tripping mechanism caused by undervoltage or voltage loss of the module.
The process of performing control operation when the output signal of the step (5) is in a reclosing state is as follows:
(i) judging whether the circuit breaker is in a non-reclosing starting state, if so, detecting whether the current voltage reaches a reclosing voltage, whether the circuit breaker is in a switching-off state, and whether the last switching-off reason is recorded as circuit breaker switching-off caused by undervoltage or voltage loss of the module, if so, entering a reclosing delay state, otherwise, waiting;
(ii) judging whether the voltage is in a reclosing delay state, if so, judging whether the voltage is always on the reclosing voltage within the delay time, if not, returning to a non-reclosing starting state, if so, judging whether the delay time is up, if so, entering the reclosing state, and executing reclosing action;
(iii) judging whether the breaker is in a reclosing action state, if so, if the breaker is successfully closed within the preset action time, clearing the reason record of the tripper, and returning to a non-reclosing starting state, and if not, failing; and checking whether the appointed reclosing times reach 3 times, recording as a fault if the appointed reclosing times reach 3 times, and returning to the reclosing delay state if the appointed reclosing times do not reach 3 times.
The utility model provides an examine automatic reclosing control circuit of pressure time delay which characterized in that: it includes the major loop, the output of major loop is connected to tank circuit and sampling circuit, tank circuit is connected to power supply circuit, sampling circuit's output is connected to the singlechip, the output of singlechip is connected to storage circuit, the singlechip still is connected with human-computer interaction interface, the output of singlechip still is connected with drive circuit, drive circuit is connected to the execution unit, the circuit breaker is installed to the execution unit, a set of normally closed auxiliary contact of circuit breaker with sampling circuit connects.
Advantageous effects
The invention provides a method and a circuit for controlling automatic reclosing with voltage detection time delay, which are used for monitoring the voltage state of a main loop of a universal circuit breaker and controlling the opening and closing of a frame circuit breaker.
Drawings
FIG. 1 is a schematic flow chart of a control method in an embodiment of the present invention;
FIG. 2 is a flow chart of control operations performed during under-voltage hold and pull-in states in an embodiment of the present invention;
FIG. 3 is a flow chart of control operations performed during a reclosing state in an embodiment of the invention;
fig. 4 is a logic diagram of an embodiment of the present invention.
Fig. 5 is a schematic connection diagram of the automatic reclosing control circuit with the voltage delay detected in the embodiment of the invention.
Detailed Description
The invention is further explained below with reference to the figures and examples.
Examples
As shown in fig. 4, in the logic diagram of the detected-voltage delayed automatic reclosing control provided in this embodiment, a part ① is a main circuit power supply of the circuit breaker, and is also a detected object of the detected-voltage device.
② is the under-voltage tripping mechanism of the breaker (when it is closed, the breaker can be in closing state, when it is released, the breaker should be in opening state).
And ③, the part is the closing state of the breaker output and is used for indicating the current closing state of the breaker.
The ④ part is a voltage detection program for detecting voltage, and is a voltage detection program in the control program inside the voltage detection device.
The ⑤ part is an external power supply voltage under-voltage judging program, calls the power supply voltage value output by ④, and judges whether the current power supply voltage is in an under-voltage state, an under-voltage reset state and a reclosing voltage state.
⑥ is used for detecting the closing state of the pressure breaker and detecting whether the current breaker is in the closing or opening state.
The ⑦ part is a detected pressure switch-on judging program, and judges whether the reclosing action is needed or not according to the relevant input state information.
⑧ is a closing coil mechanism of circuit breaker, which can execute closing action to the circuit breaker after receiving closing command.
The ⑨ part is EEPROM memory, which records whether the current breaker open state is the mark caused by detecting the pressure to issue the open command.
Wherein ④⑤⑥⑦ is an internal program of the pressure detection device.
④ part program is called at any time to detect the voltage value of the detected power supply, ⑥ part program is called at any time to detect the opening and closing state of the circuit breaker.
The method comprises the steps of detecting voltage, calling ⑤ part program at regular time to analyze voltage values detected by ④ part program, inquiring the opening and closing state of a current breaker when the power supply voltage is detected to be in an undervoltage state, confirming whether the current breaker is in a closing state, outputting an undervoltage tripping command, operating ② part mechanism to trip the breaker, judging that the undervoltage tripping of the breaker is successful by detecting a voltage device and storing the undervoltage tripping of the breaker into an EEPROM of ⑨ part if the breaker is changed from the closing state to the opening state within a set time, attracting by ② part mechanism to allow the breaker to reset if ⑤ part program analyzes that the current power supply voltage is undervoltage reset voltage, judging whether the current power supply voltage reaches reclosing voltage after ② part mechanism attracts to the proper position, judging whether the last time data in the EEPROM has a mark caused by the fact that the voltage tripping command is output by the voltage detection device, meeting the above conditions, enabling the breaker to be reclosed by ⑧ part mechanism, and clearing data recorded in the EEPROM after judging that the closing state of the breaker is successful.
As shown in fig. 1, the method for controlling the automatic reclosing with the voltage delay detected based on the internal logic comprises the following steps:
firstly, detecting that a voltage delay automatic reclosing module is powered on and started up and carrying out initialization operation;
secondly, sampling the voltage of the main circuit and the state of the circuit breaker and analyzing the acquired data;
thirdly, outputting signals according to the data analysis result in the third step;
fourthly, performing control operation when the output signal is in an under-voltage maintaining state and a pull-in state;
and fifthly, performing control operation when the output signal is in a reclosing state.
As shown in fig. 2, the process of performing the control operation when the output signal is in the under-voltage hold state and the pull-in state in the fourth step is as follows:
(a) judging whether the lamp is in an undervoltage state, if so, putting the lamp in the undervoltage state; checking whether the voltage reaches a reset voltage, if so, entering a delay state, and setting a reset delay time;
(b) judging whether the voltage is in a delay state, if so, in the reset delay time, if the voltage is continuously on the reset voltage, entering an action delay state, and performing action under-voltage keeping drive and under-voltage action drive, otherwise, returning to the under-voltage state;
(c) judging whether the operation is in an action delay state, if so, closing the undervoltage action drive after the action delay time is over, and entering a holding state;
(d) judging whether the input voltage is in a holding state, if so, detecting whether the input voltage reaches an undervoltage or voltage loss state, and if so, entering an undervoltage and voltage loss detection delay state;
(e) judging whether the input voltage is in an undervoltage detection delay state, if so, detecting whether the input voltage continuously reaches the undervoltage and undervoltage state, entering the undervoltage action state when the duration time is up, and entering the holding state when the voltage is recovered before the duration time is up;
(f) and judging whether the frame tripping mechanism is in an undervoltage action state, if so, continuously judging whether the preset tripping time is reached, if the circuit breaker is successfully switched from closing to tripping, and if so, recording the tripping of the frame tripping mechanism caused by undervoltage or voltage loss of the module.
As shown in fig. 3, the process of performing the control operation when the output signal of step (5) is in the reclosing state is as follows:
(i) judging whether the circuit breaker is in a non-reclosing starting state, if so, detecting whether the current voltage reaches a reclosing voltage, whether the circuit breaker is in a switching-off state, and whether the last switching-off reason is recorded as circuit breaker switching-off caused by undervoltage or voltage loss of the module, if so, entering a reclosing delay state, otherwise, waiting;
(ii) judging whether the voltage is in a reclosing delay state, if so, judging whether the voltage is always on the reclosing voltage within the delay time, if not, returning to a non-reclosing starting state, if so, judging whether the delay time is up, if so, entering the reclosing state, and executing reclosing action;
(iii) judging whether the breaker is in a reclosing action state, if so, if the breaker is successfully closed within the preset action time, clearing the reason record of the tripper, and returning to a non-reclosing starting state, and if not, failing; and checking whether the appointed reclosing times reach 3 times, recording as a fault if the appointed reclosing times reach 3 times, and returning to the reclosing delay state if the appointed reclosing times do not reach 3 times.
As shown in fig. 5, this embodiment further provides a detected-voltage time-delay automatic reclosing control circuit, which includes a main loop, an output end of the main loop is connected to an energy storage circuit and a sampling circuit, the energy storage circuit is connected to a power supply circuit, an output end of the sampling circuit is connected to a single chip microcomputer, an output end of the single chip microcomputer is connected to a storage circuit, the single chip microcomputer is further connected to a human-computer interaction interface, an output end of the single chip microcomputer is further connected to a driving circuit, the driving circuit is connected to an execution unit, the execution unit is installed on a circuit breaker, and a set of normally closed auxiliary contacts of the circuit breaker is connected.
The method and the circuit for controlling the automatic reclosing with the voltage detection delay are used for monitoring the voltage state of a main loop of the universal circuit breaker and controlling the opening and closing of a frame circuit breaker, are simple and easy to use through a control circuit, an under-voltage tripper and a closing electromagnet, and can realize the function of automatic resetting of the universal circuit breaker with the under-voltage protection function after no-voltage recovery based on the original frame circuit breaker accessories by only adding a control module.
Claims (4)
1. A method for controlling automatic reclosing by detecting pressure delay is characterized by comprising the following steps:
(1) detecting that a voltage delay automatic reclosing module is powered on and started up and carrying out initialization operation;
(2) sampling the voltage of a main loop and the state of a circuit breaker and analyzing the acquired data;
(3) outputting signals according to the data analysis result in the step (2);
(4) the control operation is carried out when the output signal is in an under-voltage maintaining state and a pull-in state;
(5) and when the output signal is in a reclosing state, performing control operation.
2. The automatic reclosing control method with voltage detection delay as claimed in claim 1, wherein: the process of performing control operation when the output signal in the step (4) is in the under-voltage maintaining and attracting states is as follows:
(a) judging whether the lamp is in an undervoltage state, if so, putting the lamp in the undervoltage state; checking whether the voltage reaches a reset voltage, if so, entering a delay state, and setting a reset delay time;
(b) judging whether the voltage is in a delay state, if so, in the reset delay time, if the voltage is continuously on the reset voltage, entering an action delay state, and performing action under-voltage keeping drive and under-voltage action drive, otherwise, returning to the under-voltage state;
(c) judging whether the operation is in an action delay state, if so, closing the undervoltage action drive after the action delay time is over, and entering a holding state;
(d) judging whether the input voltage is in a holding state, if so, detecting whether the input voltage reaches an undervoltage or voltage loss state, and if so, entering an undervoltage and voltage loss detection delay state;
(e) judging whether the input voltage is in an undervoltage detection delay state, if so, detecting whether the input voltage continuously reaches the undervoltage and undervoltage state, entering the undervoltage action state when the duration time is up, and entering the holding state when the voltage is recovered before the duration time is up;
(f) and judging whether the frame tripping mechanism is in an undervoltage action state, if so, continuously judging whether the preset tripping time is reached, if the circuit breaker is successfully switched from closing to tripping, and if so, recording the tripping of the frame tripping mechanism caused by undervoltage or voltage loss of the module.
3. The automatic reclosing control method with voltage detection delay as claimed in claim 2, characterized in that: the process of performing control operation when the output signal of the step (5) is in a reclosing state is as follows:
(i) judging whether the circuit breaker is in a non-reclosing starting state, if so, detecting whether the current voltage reaches a reclosing voltage, whether the circuit breaker is in a switching-off state, and whether the last switching-off reason is recorded as circuit breaker switching-off caused by undervoltage or voltage loss of the module, if so, entering a reclosing delay state, otherwise, waiting;
(ii) judging whether the voltage is in a reclosing delay state, if so, judging whether the voltage is always on the reclosing voltage within the delay time, if not, returning to a non-reclosing starting state, if so, judging whether the delay time is up, if so, entering the reclosing state, and executing reclosing action;
(iii) judging whether the breaker is in a reclosing action state, if so, if the breaker is successfully closed within the preset action time, clearing the reason record of the tripper, and returning to a non-reclosing starting state, and if not, failing; and checking whether the appointed reclosing times reach 3 times, recording as a fault if the appointed reclosing times reach 3 times, and returning to the reclosing delay state if the appointed reclosing times do not reach 3 times.
4. The utility model provides an examine automatic reclosing control circuit of pressure time delay which characterized in that: it includes the major loop, the output of major loop is connected to tank circuit and sampling circuit, tank circuit is connected to power supply circuit, sampling circuit's output is connected to the singlechip, the output of singlechip is connected to storage circuit, the singlechip still is connected with human-computer interaction interface, the output of singlechip still is connected with drive circuit, drive circuit is connected to the execution unit, the circuit breaker is installed to the execution unit, a set of normally closed auxiliary contact of circuit breaker with sampling circuit connects.
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| CN201811150494.6A CN110970864A (en) | 2018-09-29 | 2018-09-29 | Voltage detection delay automatic reclosing control method and circuit |
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| CN201811150494.6A CN110970864A (en) | 2018-09-29 | 2018-09-29 | Voltage detection delay automatic reclosing control method and circuit |
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|---|---|---|---|---|
| KR20010016899A (en) * | 1999-08-05 | 2001-03-05 | 정기호 | Digital auto reclosing relay |
| JP2005135690A (en) * | 2003-10-29 | 2005-05-26 | Fuji Electric Fa Components & Systems Co Ltd | Undervoltage tripping device of circuit breaker |
| CN104377816A (en) * | 2014-11-07 | 2015-02-25 | 浙江正泰电器股份有限公司 | Intelligent reclosure breaker and automatic reclosure control method thereof |
| CN204230186U (en) * | 2014-10-30 | 2015-03-25 | 嘉兴恒创电力设计研究院有限公司 | The special miniature circuit breaker of distributed photovoltaic low-pressure grid-connection three-phase |
| CN204230187U (en) * | 2014-10-30 | 2015-03-25 | 嘉兴恒创电力设计研究院有限公司 | The single-phase special miniature circuit breaker of distributed photovoltaic low-pressure grid-connection |
| CN105514935A (en) * | 2016-01-27 | 2016-04-20 | 常熟开关制造有限公司(原常熟开关厂） | Undervoltage controller having time delay function and control method thereof |
| CN206517031U (en) * | 2017-03-16 | 2017-09-22 | 安德利集团有限公司 | A kind of autoreclose breaker mechanism |
-
2018
- 2018-09-29 CN CN201811150494.6A patent/CN110970864A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010016899A (en) * | 1999-08-05 | 2001-03-05 | 정기호 | Digital auto reclosing relay |
| JP2005135690A (en) * | 2003-10-29 | 2005-05-26 | Fuji Electric Fa Components & Systems Co Ltd | Undervoltage tripping device of circuit breaker |
| CN204230186U (en) * | 2014-10-30 | 2015-03-25 | 嘉兴恒创电力设计研究院有限公司 | The special miniature circuit breaker of distributed photovoltaic low-pressure grid-connection three-phase |
| CN204230187U (en) * | 2014-10-30 | 2015-03-25 | 嘉兴恒创电力设计研究院有限公司 | The single-phase special miniature circuit breaker of distributed photovoltaic low-pressure grid-connection |
| CN104377816A (en) * | 2014-11-07 | 2015-02-25 | 浙江正泰电器股份有限公司 | Intelligent reclosure breaker and automatic reclosure control method thereof |
| CN105514935A (en) * | 2016-01-27 | 2016-04-20 | 常熟开关制造有限公司(原常熟开关厂） | Undervoltage controller having time delay function and control method thereof |
| CN206517031U (en) * | 2017-03-16 | 2017-09-22 | 安德利集团有限公司 | A kind of autoreclose breaker mechanism |
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