CN-121983451-A - Self-adaptive control method for controller FTU driving switch

CN121983451ACN 121983451 ACN121983451 ACN 121983451ACN-121983451-A

Abstract

The invention provides a self-adaptive control method of a controller FTU driving switch, which comprises the steps of defining a driving output end of the controller FTU after the controller FTU is electrified, enabling a spring operation output, a permanent magnet output and a magnetic control output to be output through the driving output end, collecting operation power supply voltage, synchronously obtaining I/O port state information of a three-way switching circuit detection circuit, judging the driving type of a switching mechanism which needs to be output currently according to the collected signal combination state, automatically adjusting an output pulse width default value by the controller FTU according to a judging result, and switching to a corresponding spring operation driving plate or a permanent magnet/magnetic control driving plate to output through a driving switching circuit. According to the invention, through integrating the driving circuits of the various switching mechanisms and automatically adjusting the output pulse width according to different switching mechanism types and operation conditions, the accurate driving of the different types of on-pole switches is realized, and the reliability and stability of the power system are improved.

Inventors

YAO ZUWANG
ZHOU GUANGHUI
SHEN JIAYI

Assignees

珠海博威智能电网有限公司

Dates

Publication Date: 20260505
Application Date: 20260408

Claims (10)

1. An adaptive control method for a controller FTU driving switch, comprising: After the controller FTU is electrified, a driving output end of the controller FTU is defined, so that the spring operation output, the permanent magnet output and the magnetic control output are all output through the driving output end; collecting operation power supply voltage, and synchronously acquiring I/O port state information of a three-way loop detection circuit; Judging the driving type of a switching mechanism which is required to be output currently according to the collected signal combination state, wherein: if the operation power supply voltage is alternating current, judging that the operation power supply voltage is an elastic operation mechanism, and further dividing the operation power supply voltage into AC110V or AC220V according to the voltage amplitude; if the operating power supply voltage is direct current, comprehensively judging that the switching mechanism is one of a spring operating mechanism DC24V, a spring operating mechanism DC48V, a permanent magnet mechanism DC220V or a magnetic control mechanism DC380V according to the voltage value range and the level change characteristics of the I/O port state information; The controller FTU automatically adjusts and outputs a pulse width default value according to the judging result, and the pulse width default value is switched to the corresponding spring operation driving plate or the permanent magnet/magnetic control driving plate for outputting through the driving switching circuit.
2. The method of claim 1, wherein when the operating power supply voltage is dc, the step of comprehensively determining in combination with a predetermined time threshold according to the voltage range and the level change characteristic of the I/O port status information includes: If the voltage value is detected to be in a first preset voltage range and the duration reaches or exceeds a preset time threshold, and meanwhile, the level turnover phenomenon of the I/O port of the loop detection circuit is determined, the loop detection circuit is judged to be a spring operation mechanism DC48V; if the voltage value is detected to be lower than the second preset voltage threshold value and the duration reaches or exceeds the preset time threshold value, the spring operating mechanism DC24V is judged.
3. The method according to claim 2, characterized in that: if the voltage value is detected to be in a third preset voltage range and the duration reaches or exceeds a preset time threshold, and meanwhile, the fact that the level turnover phenomenon does not exist at the I/O port of the loop detection circuit is determined, the permanent magnet mechanism DC220V is determined; If the voltage value is detected to be in a first preset voltage range and the duration reaches or exceeds a preset time threshold, and meanwhile, the fact that the level overturning phenomenon does not exist at the I/O port of the loop detection circuit is determined, the permanent magnet mechanism DC48V is determined; and if the voltage value is detected to be higher than the fourth preset voltage threshold value and the duration reaches or exceeds the preset time threshold value, judging that the magnetic control mechanism DC380V is adopted.
4. The method according to claim 1, characterized in that: The loop detection circuit comprises an optical coupler element OC1 and a loop detection power supply end, wherein the output side of the optical coupler element OC1 is connected with a resistor R1 and a capacitor C2, one end of the resistor R1 is connected with a power supply, the other end of the resistor R1 is connected with one end of the capacitor C2, and the other end of the capacitor C2 is grounded, so that an I/O port level detection circuit is formed; the input side of the optical coupler element OC1 is connected with the switching mechanism switching storage three-way output and the loop detection power supply end, wherein the switching mechanism switching storage three-way output is sequentially connected with the input side of the optical coupler element OC1 through a diode D3, a diode D4, a capacitor C1 and a rectifier diode D2.
5. The method according to claim 1, characterized in that: The driving switching circuit comprises a relay switch, the relay switch comprises a main control end, an input contact set and a state conversion contact set, the main control end of the relay switch is connected with a controller FTU core board, the on-off state of the relay switch is regulated and controlled through a control signal output by the controller FTU core board, an operation voltage input port of a spring operation driving board is connected with an operation power supply through the input contact set, a driving output port of the spring operation driving board is connected with a driving output end through the state conversion contact set, when a judgment result is a spring operation mechanism, the driving output end is configured to be connected with an external spring operation mechanism and a related control loop, and meanwhile, a self state feedback signal is transmitted back to the FTU controller core board by the spring operation driving board in real time so as to monitor the working state of the spring operation driving board.
6. The method according to claim 5, wherein: The operation voltage input port of the permanent magnet/magnetic control driving board is connected with an operation power supply through an input contact set, the driving output port of the permanent magnet/magnetic control driving board is connected with a driving output end through a state change contact set, when the judging result is a permanent magnet mechanism or a magnetic control mechanism, the driving output end is configured to be connected with an external permanent magnet mechanism or a magnetic control mechanism, and meanwhile, the permanent magnet/magnetic control driving board transmits a state feedback signal to the FTU controller core board in real time so as to monitor the working state of the permanent magnet/magnetic control driving board in real time.
7. The method according to claim 6, wherein: The input contact group comprises a first input contact and a second input contact, the first input contact is provided with a fixed contact 4, a fixed contact 8 and a movable contact 12, the second input contact is provided with a fixed contact 3, a fixed contact 7 and a movable contact 11, the state change contact group comprises a first output contact and a second output contact, the first output contact is provided with a fixed contact 2, a fixed contact 6 and a movable contact 10, the second output contact is provided with a fixed contact 1, a fixed contact 2 and a movable contact 9, a first operation voltage input port of a spring operation driving plate is connected with the fixed contact 8, a second operation voltage input port of the spring operation driving plate is connected with the fixed contact 7, a first operation voltage input port of a permanent magnet/magnetic control driving plate is connected with the fixed contact 4, a second operation voltage input port of the permanent magnet/magnetic control driving plate is connected with the fixed contact 3, a first driving output port of the spring operation driving plate is connected with the fixed contact 6, a first driving output port of the permanent magnet/magnetic control driving plate is connected with the fixed contact 2, a second driving output port of the permanent magnet/magnetic control driving plate is connected with the fixed contact 1, a first driving output port of the permanent magnet/magnetic control driving plate is connected with the fixed contact 11, and a movable contact 10 is connected with the movable contact 10 respectively.
8. The method according to any one of claims 1 to 7, wherein: The controller FTU acquires a judging result obtained by judging the driving type based on the signal combination state in real time, and the judging result is used for indicating that the driving type is output to the elastic operation driving plate or the permanent magnet/magnetic control driving plate for driving operation; in a storage unit of the controller FTU, a pulse width default value set corresponding to different driving types of the spring operation driving and the permanent magnet/magnetic control driving and a pulse width adjustment parameter table associated with different system operation conditions are prestored; after the judging result is obtained, the controller FTU invokes a corresponding basic pulse width default value from the storage unit according to the driving type determined by the judging result; the controller FTU simultaneously starts monitoring the current operation condition of the system, and acquires the current operation parameter of the system through a built-in monitoring module or communication with an external sensor; the controller FTU calculates and adjusts the called basic pulse width default value by using the acquired pulse width adjustment parameters to obtain an output pulse width default value after automatic adjustment; After finishing the automatic adjustment of the output pulse width default value, the controller FTU sends a switching control signal to the driving switching circuit, the driving switching circuit switches the output channel of the controller FTU to the elastic operation driving plate or the permanent magnet/magnetic control driving plate corresponding to the judging result according to the switching control signal, and the controller FTU outputs a control signal to the corresponding driving plate through the switched output channel according to the adjusted output pulse width default value so as to drive the external switching equipment to execute corresponding operation.
9. The method of claim 8, wherein the calculating the invoked base pulse width default value using the obtained pulse width adjustment parameter comprises the steps of: Initializing two weight coefficients w 1 and w 2 , wherein w 1 is used for weight distribution of a basic pulse width default value P base , and w 2 is used for weight distribution of pulse width adjustment parameters; The method comprises the steps of monitoring running state indexes of a system in real time, wherein the running state indexes comprise a system power fluctuation rate delta P rate and an environment temperature change rate delta Trate , adjusting weight coefficients w 1 and w 2 according to the system power fluctuation rate delta P rate , and adjusting weights according to the following formula when delta P rate is larger than a preset power fluctuation threshold P threshold : w 1 =w 1 β 1 ×(ΔP rate P threshold ) w 2 =w 2 +β 1 ×(ΔP rate P threshold ) wherein, beta 1 is the power fluctuation adjustment coefficient; The weight coefficient is further fine-tuned according to the ambient temperature change rate Δt rate , and when Δt rate is greater than a preset temperature change threshold T threshold , the weight is adjusted according to the following formula: w 1 =w 1 β 2 ×(ΔT rate T threshold ) w 2 =w 2 +β 2 ×(ΔT rate T threshold ) Wherein, beta 2 is the temperature change adjustment coefficient.
10. The method according to claim 9, wherein: After each weight adjustment, w 1 and w 2 are normalized, and the normalization formula is: carrying out normalization processing on the pulse width adjustment parameters, mapping the pulse width adjustment parameters to an order of magnitude similar to a basic pulse width default value, wherein a normalization formula is as follows: Wherein, P adj is the original pulse width adjustment parameter, P adj_min and P adj_max are the minimum value and the maximum value of the pulse width adjustment parameter, and P adj_norm is the normalized pulse width adjustment parameter; According to the dynamically adjusted weight coefficients w 1 and w 2 , the normalized pulse width adjustment parameter P adj_norm and the basic pulse width default value P base , an output pulse width default value P out is calculated according to the following formula: P out =w 1 ×P base +w 2 ×P adj_norm ×K Wherein K is a scale factor for further adjusting the degree of influence of the pulse width adjustment parameter on the output pulse width.

Description

Self-adaptive control method for controller FTU driving switch Technical Field The invention relates to the technical field of FTU switch driving in a power system, in particular to a self-adaptive control method of a controller FTU driving switch, which is suitable for driving control of power equipment such as a pole switch (circuit breaker) and the like, and can automatically adjust output pulse width according to different switch mechanism types so as to realize accurate driving of the switch mechanism. Background In the power system, the pole switch is used as an important power distribution device, and the control accuracy and reliability of the pole switch directly influence the stable operation of the power system. The controller FTU is used as a control core of the on-pole switch, and needs to be able to adapt to different types of switching mechanisms, such as a spring operating mechanism, a permanent magnet mechanism, a magnetic control mechanism and the like, wherein the driving voltage level of each mechanism is different, for example, the spring operating mechanism comprises DC24V, DC, V, AC V, AC220V and the like, the permanent magnet structure also comprises DC48, V, DC and 220V, and the magnetic control mechanism comprises DC 380V. Therefore, the matched distribution network Feeder Terminal (FTU) controllers on the secondary side of each pole-mounted switch (breaker) are various in types, each structure (spring operation, permanent magnet and magnetic control) corresponds to one large type, and each large type is further subdivided into a plurality of different series of types due to different driving voltage grades (24V, 48V, 220V and 380V), namely, the controllers are not strong in universality, so that the production and preparation of a company are complex and complicated, the production and assembly test efficiency is low, and the after-sales maintenance cost is high. Conventional FTU drive schemes are typically designed for specific switching mechanisms, with each drive circuit being adaptable to only one or a few switching mechanisms. When a different type of switching mechanism needs to be replaced or used, the whole FTU controller often needs to be replaced or a driving circuit needs to be modified in a large scale, which not only increases the cost, but also reduces the flexibility and maintainability of the system. In addition, when the existing FTU drives the switching mechanism, a pulse width adjustment mode is relatively fixed, dynamic adjustment cannot be performed according to different factors such as operating power supply voltage and load conditions, and accuracy and reliability of switching actions are affected. For example, in the case of large operating supply voltage fluctuations or load variations, a fixed pulse width output may result in a switch that is not in place or that is too long to operate, thereby affecting the proper operation of the power system. Disclosure of Invention The invention provides a self-adaptive control method of a controller FTU driving switch, which is characterized in that driving circuits of various switching mechanisms are integrated, and output pulse width is automatically adjusted according to different switching mechanism types and operation conditions, so that accurate driving of different types of on-pole switches is realized, and the reliability and stability of a power system are improved. The invention realizes the above purpose through the following technical scheme: An adaptive control method for a controller FTU driving switch, comprising: After the controller FTU is electrified, a driving output end of the controller FTU is defined, so that the spring operation output, the permanent magnet output and the magnetic control output are all output through the driving output end; collecting operation power supply voltage, and synchronously acquiring I/O port state information of a three-way loop detection circuit; Judging the driving type of a switching mechanism which is required to be output currently according to the collected signal combination state, wherein: if the operation power supply voltage is alternating current, judging that the operation power supply voltage is an elastic operation mechanism, and further dividing the operation power supply voltage into AC110V or AC220V according to the voltage amplitude; if the operating power supply voltage is direct current, comprehensively judging that the switching mechanism is one of a spring operating mechanism DC24V, a spring operating mechanism DC48V, a permanent magnet mechanism DC220V or a magnetic control mechanism DC380V according to the voltage value range and the level change characteristics of the I/O port state information; The controller FTU automatically adjusts and outputs a pulse width default value according to the judging result, and the pulse width default value is switched to the corresponding spring operation driving plate or the permanent magnet/magnetic cont