Search

CN-121984390-A - Transformer control device and method based on time period, load and faults

CN121984390ACN 121984390 ACN121984390 ACN 121984390ACN-121984390-A

Abstract

The invention relates to the technical field of transformers, in particular to a transformer control device and method based on time periods, loads and faults. The device comprises a double-transformer unit, a monitoring unit, a control unit and an execution unit. The monitoring unit monitors the voltage, the current and the temperature of the double transformers, and the control unit controls the execution unit to realize the switching-on and switching-off control of the double transformers according to the monitoring data, so that the transformers are efficiently controlled in different time periods, different load states and fault states, zero interruption is controlled, and the utilization efficiency of the transformers is improved.

Inventors

  • QIN WENQIANG
  • Bao Songrui
  • Shao ding

Assignees

  • 湖北亚坤电力设备有限公司

Dates

Publication Date
20260505
Application Date
20260204

Claims (10)

  1. 1. A transformer control device based on time period, load and fault, comprising: The double-transformer unit comprises a first transformer, a second transformer, a first breaker, a second breaker and a load bus, wherein the first breaker is connected in series with the input end of the first transformer, the second breaker is connected in series with the input end of the second transformer, the output ends of the first transformer and the second transformer are connected in parallel with the load bus through branch cables, the first breaker is provided with auxiliary contacts for controlling the switching-on and switching-off of the first transformer, and the second breaker is provided with auxiliary contacts for controlling the switching-on and switching-off of the second transformer; The monitoring unit comprises a first voltage sensor, a second voltage sensor, a first current sensor, a second current sensor, a first temperature sensor, a second temperature sensor, a power factor sensor, a data acquisition module and a data preprocessing chip, wherein the first voltage sensor and the second voltage sensor are respectively arranged in parallel on a U phase and a V phase of a load bus and are used for acquiring real voltage of a load side, the first current sensor and the second current sensor are respectively connected in series on the U phase of the bus and are respectively used for acquiring current of a first transformer and a second transformer, the first temperature sensor acquires temperature of the first transformer, the second temperature sensor acquires temperature of the second transformer, the power factor sensor is connected in series on a W phase of the load bus, and the data acquisition module is used for acquiring data acquired by the first voltage sensor, the second voltage sensor, the first current sensor, the second current sensor, the first temperature sensor and the power factor sensor and inputting the data to the data preprocessing chip; The control unit comprises a main controller and a data storage module, wherein the data storage module is connected with the monitoring unit and the main controller and receives the monitoring data output by the monitoring unit; the execution unit comprises a first contactor, a second contactor, a first opening relay, a first closing relay, a second opening relay and a second closing relay, wherein the first contactor, the second contactor, the first opening relay, the first closing relay, the second opening relay and the second closing relay are respectively connected with the control unit through signals, the first contactor is used for controlling the first transformer to start, the second contactor is used for controlling the second transformer to start, the first opening relay is used for controlling the opening of the first breaker, the first closing relay is used for controlling the first breaker to close, the second opening relay is used for controlling the second breaker to open, and the second closing relay is used for controlling the second breaker to close.
  2. 2. The transformer control device according to claim 1, wherein one end of the coil of the first contactor is connected to one terminal of the main controller, the other end is connected to the negative electrode of the power supply, the first contactor is attracted when the main controller outputs a high level, the first transformer is started, one end of the coil of the second contactor is connected to one terminal of the main controller, the other end is connected to the negative electrode of the power supply, the second contactor is attracted when the main controller outputs a high level, and the second transformer is started.
  3. 3. The transformer control device according to claim 2, wherein, One end of a coil of the first opening relay is connected with one terminal of the main controller, and the other end of the coil of the first opening relay is connected with a negative electrode of a power supply; One end of a coil of the first closing relay is connected with one terminal of the main controller, the other end is connected with the negative electrode of the power supply; one end of the coil of the second separating brake relay is connected with one terminal of the main controller, the other end is connected with the negative electrode of the power supply; one end of a coil of the second closing relay is connected with one terminal of the main controller, the other end is connected with the negative electrode of the power supply.
  4. 4. A control method of the transformer control device according to any one of claims 1 to 3, comprising: The controller reads historical data and rated parameters of the transformer from the data storage module, eliminates abnormal values and performs standardized processing to obtain a pretreatment data set, wherein the pretreatment data set comprises standardized time, effective active power and peak Gu Ping identification; Based on the effective active power and peak Gu Ping identification, dividing a closing time period and a opening time period through a clustering algorithm, and obtaining time period control parameters through conflict verification, parameter confirmation and configuration, wherein the time period control parameters comprise a valley section closing time point, a valley section opening time point, a peak section closing time point, a peak section opening time point and instruction trigger delay; Calculating a low load threshold and a high load threshold by quantile statistics based on historical power distribution of the preprocessed data by the main controller; The main controller calculates a fault threshold based on rated parameters and safety coefficients of the transformer and stores the fault threshold into the data storage module, wherein the fault threshold comprises an overcurrent threshold, an overvoltage threshold, an undervoltage threshold, an overtemperature threshold and a short circuit threshold.
  5. 5. The control method according to claim 4, characterized by further comprising: Acquiring a real-time data set through a monitoring unit and a control unit, wherein the real-time data set comprises system time, filtering real-time power, first transformer state information and second transformer state information; Obtaining a time period control instruction according to a real-time data set, time period control parameters and time period priority through the steps of triggering window judgment, signal amplification, state inspection, priority processing and delay triggering, wherein the time period control instruction comprises a first transformer switching-on instruction, a first transformer switching-off instruction, a second transformer switching-on instruction, a second transformer switching-off instruction and an instruction priority; the method comprises the steps that a main controller obtains a load judging result based on a real-time data set, a load control threshold value and a historical load grade through grading, duration statistics and signal confirmation, wherein the load judging result comprises a load grade result, a load grade stabilizing result and filtering real-time power; The main controller performs mode identification, target mode decision and control mode instruction generation based on the time period control instruction, the load judgment result, the real-time data set and the operation mode definition to obtain a mode control instruction, wherein the mode control instruction is used for switching the current operation mode into a target operation mode; The execution unit receives the mode control instruction, executes the opening and closing action, and the circuit breaker feeds back the action state to the main controller to verify the execution result.
  6. 6. The method according to claim 5, wherein the step of obtaining the time period control command including the first transformer closing command, the first transformer opening command, the second transformer closing command, the second transformer opening command and the command priority according to the real-time data set, the time period control parameter and the time period priority through the trigger window judgment, the signal amplification, the state check, the priority processing and the delay triggering comprises: if the time relay detects that the system time is in a switching-on trigger window, a switching-on trigger signal is output, wherein the switching-on trigger window is a time window formed by switching-on time points in an allowable system time deviation range; Outputting a switching-off trigger signal if the time relay detects that the system time is in a switching-off trigger window, wherein the switching-off trigger window is a time window formed by switching-off time points in an allowable system time deviation range; The intermediate relay receives a closing trigger signal or a separating trigger signal, the coil of the intermediate relay is electrified, the normally open contact of the intermediate relay is closed, and a time period triggering confirmation signal is sent to the main controller; after receiving the time period trigger confirmation signal, the main controller detects the current transformer state; If the period triggering confirmation signal is detected to confirm that the valley period switching-on time triggering signal is the switching-off state and the first transformer state is the switching-on state, a first transformer switching-on instruction is generated; If the period triggering confirmation signal is detected to confirm that the valley period opening time triggering information is the closing state of the first transformer, generating a first transformer opening instruction; If the time period triggering confirmation signal is detected to confirm that the peak period switching-on time triggering signal is the switching-off state and the second transformer state is the switching-on state, generating a second transformer switching-on instruction; If the time period triggering confirmation signal is detected to confirm that the peak period switching-off time triggering information is detected and the second transformer state is a switching-on state, generating a second transformer switching-off instruction; If the valley section opening time point is detected to be overlapped with the peak section closing time point, the main controller preferably executes a peak section instruction; After the main controller meets the trigger condition, the trigger delay of the countdown instruction is 1 second, and the instruction is output without a new trigger signal.
  7. 7. The control method according to claim 5, wherein the main controller obtains a load judgment result based on the real-time data set, the load control threshold value and the historical load level through classification, duration statistics and signal confirmation, the load judgment result including a load level result, a load level stabilization result and a filtered real-time power, comprising: If the detected filtering real-time power is smaller than or equal to the low-load threshold value, marking the load level of the current sampling period as low load; if the filtering real-time power is detected to be larger than the low load threshold and smaller than or equal to the high load threshold, marking the load level of the current sampling period as a medium load; if the filtering real-time power is detected to be larger than the high load threshold, marking the load level of the current sampling period as high load; the main controller counts the duration of the load level; if the load level of the current sampling period is detected to be equal to the load level of the previous sampling period, the main controller counts the duration of the load level and increases by 0.1s; if the load level of the current sampling period is detected to be unequal to the load level of the previous sampling period, resetting the duration of the load level to 0.1 second, and resetting the main controller for timing; If the detected load level duration is greater than or equal to the load level time threshold, the main controller generates a confirmation signal of stable load level; Outputting the load level of the current sampling period, confirming the stable load level, and filtering the real-time power.
  8. 8. The control method according to claim 5, wherein the main controller performs pattern recognition, target pattern decision, and control pattern instruction generation based on the period control instruction, the load judgment result, the real-time data set, and the operation pattern definition to obtain a pattern control instruction for switching the current operation pattern to the target operation pattern, comprising: if the state of the first transformer is detected to be closed and the state of the second transformer is detected to be open, determining that the current operation mode is a first operation mode, wherein the first operation mode is an operation mode of closing the first transformer and opening the second transformer; if the first transformer state is detected to be open and the second transformer state is detected to be closed, determining that the current operation mode is a second operation mode, wherein the second operation mode is an operation mode of opening the first transformer and closing the second transformer; If the state of the first transformer is detected to be closed and the state of the second transformer is detected to be closed, determining that the current operation mode is a third operation mode, wherein the third operation mode is an operation mode of closing the first transformer and closing the second transformer; if the first transformer state is detected to be open and the second transformer state is detected to be open, determining that the current operation mode is a fourth operation mode, wherein the fourth operation mode is an operation mode of opening the first transformer and opening the second transformer.
  9. 9. The control method according to claim 5, wherein the main controller performs pattern recognition, target pattern decision, and control pattern instruction generation based on the period control instruction, the load judgment result, the real-time data set, and the operation pattern definition to obtain a pattern control instruction for switching the current operation pattern to the target operation pattern, and further comprising: when the load level of the current sampling period is low load or medium load and the period control instruction is a first transformer closing instruction, determining a target operation mode as a first operation mode; When the load level of the current sampling period is low load or medium load and the period control instruction is a second transformer closing instruction, determining a target operation mode as a first operation mode; when the load level of the current sampling period is low load or medium load and no period control instruction is generated, determining a target operation mode as a first operation mode; When the load level of the current sampling period is high load, the target operation mode is determined to be a third operation mode; When the period control command is the first transformer brake-off command or the second transformer brake-off command, the target operation mode is determined as a fourth operation mode.
  10. 10. The control method according to claim 4, characterized by further comprising: the monitoring unit acquires current, voltage and temperature data of the transformer in real time, and the current, the voltage and the temperature data are packaged into signal frames through the data acquisition element and are uploaded to the main controller at regular time; The main controller compares the fault monitoring signal frame with a fault threshold value, judges whether to trigger a fault, identifies the fault type and confirms fault equipment; The breaking relay of the execution unit receives the ID of the fault equipment, sends an emergency breaking instruction to the breaker of the fault transformer, collects breaking feedback, retries if the breaking feedback fails, ensures that the fault equipment is isolated from a power grid, and outputs a breaking result and the ID of the standby equipment; The switching-on relay of the execution unit receives the ID of the standby equipment, judges the bearing capacity of the standby equipment in combination with the real-time load, and sends an emergency switching-on instruction.

Description

Transformer control device and method based on time period, load and faults Technical Field The invention relates to the technical field of transformers, in particular to a transformer control device and method based on time periods, loads and faults. Background The traditional transformer mostly adopts an all-weather full-load operation mode, and the operation state is adjusted by not combining the power consumption period of the power grid peak Gu Ping and the actual load change of a user. The load rate of the transformer in the low load period (such as at night) is lower than 30%, the ineffective energy consumption ratio reaches 15% -20%, and if only a single transformer runs in the high load period, the efficiency is easy to be reduced due to overload. The existing system is used for setting a load threshold value by relying on manual experience, and is not used for quantitative analysis based on historical electricity consumption data, so that the time deviation of single-station/double-station switching is caused, equipment loss is increased by frequent start and stop, or energy redundancy is caused by long-term operation of double stations. Most transformer systems have no backup or backup switching relies on manual operation, and the recovery time after failure is long, so that the requirement of user basic operation (such as a data center and a continuous production workshop) on zero interruption cannot be met. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a transformer control device and a transformer control method based on time period, load and faults. According to a first aspect of the invention, a transformer control device based on time periods, loads and faults is provided, and the transformer control device comprises a double-transformer unit, a monitoring unit, a control unit and an execution unit. The double-transformer unit comprises a first transformer, a second transformer, a first breaker, a second breaker and a load bus, wherein the first breaker is connected in series with the input end of the first transformer, the second breaker is connected in series with the input end of the second transformer, the output end of the first transformer is connected in parallel with the load bus through a branch cable, the first breaker is provided with an auxiliary contact for controlling the switching-on and switching-off of the first transformer, and the second breaker is provided with an auxiliary contact for controlling the switching-on and switching-off of the second transformer. The monitoring unit comprises a first voltage sensor, a second voltage sensor, a first current sensor, a second current sensor, a first temperature sensor, a second temperature sensor, a power factor sensor, a data acquisition module and a data preprocessing chip, wherein the first voltage sensor and the second voltage sensor are respectively arranged in parallel on a U phase and a V phase of a load bus and used for acquiring real voltage of a load side, the first current sensor and the second current sensor are respectively connected in series on the U phase of the bus and used for acquiring current of a first transformer and a second transformer, the first temperature sensor acquires temperature of the first transformer, the second temperature sensor acquires temperature of the second transformer, the power factor sensor is connected in series on the W phase of the load bus, and the data acquisition module is used for acquiring data acquired by the first voltage sensor, the second voltage sensor, the first current sensor, the second current sensor, the first temperature sensor and the power factor sensor and inputting the data to the data preprocessing chip. The control unit comprises a main controller and a data storage module, wherein the data storage module is connected with the monitoring unit and the main controller and receives the monitoring data output by the monitoring unit. The execution unit comprises a first contactor, a second contactor, a first opening relay, a first closing relay, a second opening relay and a second closing relay, wherein the first contactor, the second contactor, the first opening relay, the first closing relay, the second opening relay and the second closing relay are respectively connected with the control unit through signals, the first contactor is used for controlling the first transformer to start, the second contactor is used for controlling the second transformer to start, the first opening relay is used for controlling the first breaker to open, the first closing relay is used for controlling the first breaker to close, the second opening relay is used for controlling the second breaker to open, and the second closing relay is used for controlling the second breaker to close. The transformer control device has redundant design of double transformers, double power supplies and double circuit breakers, the fault switching time is less