Temperature optimization control method and system for water-cooled distributed phase modifier

Abstract

The invention discloses a temperature optimization control method and system for a water-cooled distributed phase modifier, and the method comprises the steps: obtaining a temperature measurement value, and carrying out the adjustment and control of the temperature of the distributed phase modifier through the start and stop of temperature adjustment equipment, such as an electric heater, a cooling fan unit, and the like; the start-stop operation is combined with cycle switching, fault switching, polling start-stop and variable frequency adjustment control methods, so that the reliability and stability of a control scheme are improved, cooling fan unit equipment start-stop optimization on full-cycle life management is completed, and optimal control over the temperature of a distributed phase modifier external cold water system is achieved.

Description

Technical Field

[0001] The present invention relates to the field of thermal automatic control technology, and in particular to a temperature optimization control method and system for a water-cooled distributed phase regulator. Background Art

[0002] my country's clean energy and load centers show obvious inverse distribution characteristics. Renewable clean resources are distributed in large quantities in the "Three Norths" of Northeast China, North China, and Northwest China, while electricity load centers are concentrated in the eastern and central regions. In order to solve the problem of unbalanced energy load distribution and new energy consumption, using UHV DC transmission as a carrier to transmit clean energy power generation is a typical solution. To achieve DC UHV transmission, one of the important links is AC-DC conversion. A large amount of reactive power support is required during the commutation process. Especially when the system voltage fluctuates, dynamic reactive power support equipment is particularly important.

[0003] Distributed phase condensers are small-capacity synchronous motor reactive power compensation equipment arranged in converter stations. They have excellent transient and steady-state full-process voltage support capabilities and play an important role in maintaining the voltage stability of the near-field system at the sending end. At present, the auxiliary systems of distributed phase condensers under construction or in operation basically adopt distributed control systems (DCS) for decentralized and centralized control. The auxiliary systems of phase condensers include lubricating oil system, excitation system, starting system and cooling system. Among them, the circulating water cooling system is an important auxiliary cooling system in water-cooled distributed phase condensers. The water-cooling temperature control part is mainly composed of electric heaters, cooling fans, circulating water pressure supply pipes and various transmitters. At present, the conventional temperature control method is to start all fans at the same time and stop all fans at the same time. From the perspective of equipment full-cycle life management, the full start and full stop operation mode of the fan group is simple to control and operate, but it is easy to cause frequent start and stop of all cooling fans near the target temperature value. Full start and full stop is not conducive to energy saving and consumption reduction, and it is very easy to cause equipment damage and failure, which is not conducive to the polling standby management of fan equipment. The impact of long-term intermittent operation of the fan unit on the life of the fan unit is objective, which will bring many inconveniences to the normal maintenance of the distributed phase regulator during operation. Therefore, it is necessary to design a temperature optimization control method and system based on the characteristics of the water-cooled distributed phase regulator to ensure the normal operation of the cooling system in the event of a fault, and to further optimize the entire water-cooled temperature control loop to comprehensively improve the reliability and stability of the control system. Summary of the invention

[0004] In view of the above-mentioned problems, the present invention is proposed.

[0005] The purpose of the present invention is to provide a temperature optimization control method and system for a water-cooled distributed phase regulator, optimize the control of the circulating cooling water temperature, and adopt periodic switching, fault switching, polling start and stop, and frequency conversion adjustment methods to control heaters, cooling fans and other temperature control equipment, so as to comprehensively improve the reliability and stability of the control scheme for the water cooling system of the distributed phase regulator; adopt the polling start and stop operation mode to realize the full-cycle life management of the cooling fan equipment, and further improve the safety of the long-term operation of the phase regulator.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] In a first aspect, the present invention provides a temperature optimization control method for a water-cooled distributed phase regulator, comprising:

[0008] Obtaining a measured value of the inlet main pipe temperature, and controlling the temperature of the distributed phase regulator according to the measured value of the inlet main pipe temperature, wherein the control includes a first control and a second control;

[0009] The first control includes making a first judgment based on the measured value of the inlet main pipe temperature, if the measured value of the inlet main pipe temperature is lower than the start temperature of one electric heater set by the distributed control system and higher than the start temperature of two electric heaters, then after a set delay, polling and starting one electric heater;

[0010] A second judgment is made based on the measured value of the inlet main pipe temperature. If the measured value of the inlet main pipe temperature is lower than the start-up temperature of the two electric heaters set by the distributed control system, the two electric heaters are started at the same time after a set delay.

[0011] Performing a third judgment on the electric heater, the third judgment comprising: judging whether the electric heater has a fault;

[0012] The second control includes performing a fourth judgment on the measured value of the inlet main pipe temperature, and if the measured value of the inlet main pipe temperature is greater than the cooling fan start temperature set by the distributed control system, polling and starting the cooling fan units until the phase-converting phase inlet water temperature reaches the target temperature range or all cooling fan units are started;

[0013] Performing a fifth judgment on the cooling air unit, the fifth judgment comprising judging whether there is a fault in the cooling air unit, and if a fault occurs, a monitoring interface issues an optical sign alarm and reports fault information;

[0014] Obtain a real-time inlet main pipe temperature measurement value, and perform a sixth judgment based on the real-time inlet main pipe temperature measurement value. If the real-time inlet main pipe temperature measurement value is lower than the cooling fan stop temperature set by the distributed control system, the sixth judgment result is to stop the cooling fans in a step-by-step manner until the last group of cooling fans is stopped.

[0015] As a preferred solution of the temperature optimization control method of the water-cooled distributed phase regulator of the present invention, the first judgment and the second judgment according to the measured value of the inlet main pipe temperature include:

[0016] When the temperature of the water-cooling inlet main pipe of the distributed phase regulator is lower than the starting temperature of one electric heater and higher than the starting temperature of two electric heaters, the electric heaters will be started in turn, and the number of start-ups is 1;

[0017] The electric heater operates in a cycle switching mode. The switching cycle can be set. When the running time of the electric heater reaches the cycle switching time, another electric heater is started. After the other electric heater is fully started, the electric heater is stopped.

[0018] When the temperature of the water-cooling inlet main pipe of the distributed phase regulator is lower than the starting temperature of the two electric heaters, the two electric heaters will be started at the same time, and the number of startups is 2.

[0019] As a preferred solution of the temperature optimization control method of the water-cooled distributed phase regulator of the present invention, the third judgment on the electric heater includes:

[0020] When the number of startups is 1 and the electric heaters are all fault-free, the main electric heater is started in turn;

[0021] If the main electric heater fails and is in the starting state, the backup electric heater will be started after the set delay. After the backup electric heater is started, the faulty electric heater will be stopped, and the monitoring interface will issue an optical sign alarm and report the fault information;

[0022] When the number of startups is 2 and both electric heaters are not faulty, both electric heaters will be started at the same time;

[0023] If there is an electric heater failure, after a set delay, the normal electric heater is started and the faulty electric heater is stopped. The monitoring interface issues an optical sign alarm and reports the fault information.

[0024] As a preferred solution of the temperature optimization control method of the water-cooled distributed phase regulator of the present invention, the fourth judgment on the measured value of the inlet main pipe temperature includes:

[0025] The cooling fan group is divided into variable frequency fan and industrial frequency fan. Assume that the number of cooling fan groups is n, the number of variable frequency fan groups is x, the number of industrial frequency fan groups is nx, and the number of starting fan groups is m, m∈[1,n];

[0026] When m < x, when the temperature of the main inlet pipe of the distributed synchronous condenser is higher than the starting temperature of the m - group of fans and lower than the starting temperature of the (m + 1)-group of fans, if all the variable-frequency fans are normal, then poll to start the m - group of variable-frequency fans, sort the variable-frequency fan groups according to the cumulative start-up times, and preferentially start the group with the least cumulative start-up times, and start one by one until the m - group of variable-frequency fans are all started;

[0027] When m = x, when the temperature of the main inlet pipe of the distributed synchronous condenser is higher than the starting temperature of the m - group of fans and lower than the starting temperature of the (m + 1)-group of fans, start the m - group of variable-frequency fans;

[0028] When m > x, when the temperature of the main inlet pipe of the distributed synchronous condenser is higher than the starting temperature of the m - group of fans and lower than the starting temperature of the (m + 1)-group of fans, start the m - group of cooling fans, preferentially start the variable-frequency fans, and the variable-frequency fan groups and the industrial-frequency fan groups are polled to start respectively, sort according to the cumulative start-up times, and start one by one the group with the least cumulative start-up times until the m - group of cooling fans are all started;

[0029] As a preferred scheme of the temperature optimization control method of the water-cooled distributed synchronous condenser described in the present invention, wherein: the fifth judgment on the cooling fan group includes:

[0030] The variable-frequency fan includes a variable-frequency circuit and an industrial-frequency circuit;

[0031] The industrial-frequency fan only has an industrial-frequency circuit. If the variable-frequency circuit of the variable-frequency fan fails, then start the industrial-frequency bypass operation without frequency modulation, and the fan can still be normally started through the industrial-frequency circuit and then be regarded as an industrial-frequency fan for operation;

[0032] Suppose there are p groups of variable-frequency circuits of the variable-frequency fans that fail, p ∈ [1, x];

[0033] When m < x, if the variable-frequency circuits of p groups of variable-frequency fans fail and p ≤ x - m, then select m groups from the remaining x - p groups of variable-frequency fans without failure and poll to start;

[0034] When m < x, if the variable-frequency circuits of p groups of variable-frequency fans fail and p > x - m, then start the x - p groups of variable-frequency fans without failure and m - (x - p) groups of industrial-frequency fans, preferentially start the variable-frequency fans, and the variable-frequency fan groups and the industrial-frequency fan groups are polled to start respectively, sort according to the cumulative start-up times, and start one by one the group with the least cumulative start-up times until the m - group of cooling fans are all started or all the normal fans are started;

[0035] When m = x, if the variable-frequency circuits of p groups of variable-frequency fans fail and p < x, then start the x - p groups of variable-frequency fans without failure and p groups of industrial-frequency fans, preferentially start the variable-frequency fans, and the variable-frequency fan groups and the industrial-frequency fan groups are polled to start respectively, sort according to the cumulative start-up times, and start one by one the group with the least cumulative start-up times until the m - group of cooling fans are all started or all the normal fans are started;

[0036] When m = x, if the frequency conversion circuit of the p groups of variable frequency fans fails and p = x, then start the m groups of industrial frequency fans. The industrial frequency fan groups are started in a polling manner, sorted according to the cumulative start times, and the industrial frequency fan group with the least cumulative start times is started one by one until the m groups of cooling fans are started or all normal fans are started.

[0037] When m > x, if the frequency conversion circuit of the p groups of variable frequency fans fails and p < x, then start the x - p groups of variable frequency fans without failure and the m - (x - p) groups of industrial frequency fans. The variable frequency fans are started preferentially, and the variable frequency fan groups and the industrial frequency fan groups are started in a polling manner respectively, sorted according to the cumulative start times, and the group with the least cumulative start times is started one by one until the m groups of cooling fans are started or all normal fans are started.

[0038] When m > x, if the frequency conversion circuit of p variable frequency fans fails and p = x, then start the m groups of industrial frequency fans without failure. The industrial frequency fan groups are started in a polling manner, sorted according to the cumulative start times, and the industrial frequency fan group with the least cumulative start times is started one by one until the m groups of cooling fans are started or all normal fans are started.

[0039] As a preferred scheme of the temperature optimization control method of the water - cooled distributed synchronous condenser described in the present invention, wherein: the fifth judgment on the cooling fan groups further includes:

[0040] If both the frequency conversion circuit and the industrial frequency circuit of the variable frequency fan fail, then only start in a polling manner from the industrial frequency fan groups;

[0041] Sorted according to the cumulative start times, start the industrial frequency fan with the least cumulative start times one by one until the m groups of cooling fans are started or all normal fans are started.

[0042] As a preferred scheme of the temperature optimization control method of the water - cooled distributed synchronous condenser described in the present invention, wherein: the sixth judgment according to the measured value of the real - time inlet main pipe temperature includes:

[0043] When the temperature drops to reach the cooling fan stop temperature, according to the number of fans to be stopped corresponding to the stop temperature, preferentially select the industrial frequency fans that have been started for shutdown. The principle is to stop the earlier - started ones first, that is, stop the industrial frequency fan with the longest current cumulative operation duration.

[0044] When the industrial frequency fan cannot be shut down due to a broken control circuit, the distributed control system background issues a shutdown failure fault alarm.

[0045] If none of the industrial frequency fans meet the stop conditions, then stop the variable frequency fans. The principle is to stop the earlier - started ones first, that is, stop the variable frequency fan with the longest current cumulative operation duration.

[0046] In a second aspect, the present invention provides a system for temperature optimization control of a water-cooled distributed phase regulator, comprising:

[0047] A sensor module, used to detect non-electrical signals and convert them into electrical signals;

[0048] The controller module is responsible for receiving the signals sent by the sensor and sending instructions to control the actuator to keep the temperature of the external cooling water system of the distributed phase regulator stable;

[0049] The actuator module is used for heating or cooling the circulating medium and executing the instructions issued by the controller module.

[0050] As a preferred solution of the system of the temperature optimization control method of the water-cooled distributed phase regulator described in the present invention, wherein:

[0051] The main body of the sensor module is a temperature measurement circuit, which contains a temperature sensor. The temperature sensor is installed at the inlet of the water cooling pipeline of the cooling equipment to measure the temperature of the water cooling inlet main pipe of the phase shifter.

[0052] As a preferred solution of the system of the temperature optimization control method of the water-cooled distributed phase regulator described in the present invention, wherein:

[0053] The controller module is divided into a main control module and a slave control module. The main control module performs logical operations and outputs control instructions according to the data sent by the slave control module.

[0054] The slave controller module is responsible for sending the data collected by the sensor module, reporting the status of the temperature control loop to the master control module, and performing data exchange;

[0055] The temperature control loop includes a transmitter. When the physical quantity detection signal of the transmitter exceeds the alarm value, an alarm message is returned to the background monitoring of the distributed control system.

[0056] Beneficial effects of the present invention:

[0057] 1. In the temperature optimization control method of the water-cooled distributed phase regulator proposed in the present invention, the cooling fan unit adopts a step start and stop method, which is different from the traditional full start and full stop method. Step start and stop divides the cooling fan unit into two types: variable frequency and industrial frequency, and sets the temperature control range, which can avoid the frequent start and stop of the cooling fan unit and achieve energy saving and consumption reduction.

[0058] 2. The present invention adopts control methods such as cycle switching, fault switching, polling start and stop, and frequency conversion regulation to control heaters, cooling fans and other temperature control equipment to ensure the normal operation of the cooling system in the event of a fault. It not only improves the reliability and stability of the control scheme, but also realizes the optimization of the start and stop of the cooling fan unit equipment in the full-cycle life management. Cycle switching and polling start and stop take into account the full-cycle life management of the equipment. The alternating operation of the cooling fan is realized through cycle switching operation. Through polling start and stop, the unit with the least number of starts is started first, and the unit with the longest running time is stopped first. Fault switching is a fault-tolerant mechanism. Even if a cooling fan unit fails, the DCS immediately issues a command to start other cooling fan units that can be started normally to ensure the normal thermal protection of the distributed phase regulator. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0060] Figure 1 An overall flow chart of a temperature optimization control method for a water-cooled distributed phase regulator provided by the present invention;

[0061] Figure 2 A process diagram of a distributed phase condenser external cooling water temperature optimization system for a temperature optimization control method of a water-cooled distributed phase condenser provided by the present invention;

[0062] Figure 3 A schematic diagram of a functional block of an equipment selection algorithm for a temperature optimization control method of a water-cooled distributed phase regulator provided by the present invention. DETAILED DESCRIPTION

[0063] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0064] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0065] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0066] The present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0067] At the same time, in the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper, lower, inner and outer" are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first, second or third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0068] In the present invention, unless otherwise clearly specified and limited, the terms "install, connect, connect" should be understood in a broad sense, for example: it can be a fixed connection, a detachable connection or an integral connection; it can also be a mechanical connection, an electrical connection or a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] Example 1

[0070] Reference Figure 1-2 , which is an embodiment of the present invention, provides a temperature optimization control method for a water-cooled distributed phase regulator, comprising:

[0071] S100: obtaining a measured value of the inlet main pipe temperature, and controlling the temperature of the distributed phase regulator according to the measured value of the inlet main pipe temperature, wherein the control includes a first control and a second control;

[0072] Specifically, for the thermal management of distributed phase regulators, the temperature is adjusted through a water cooling system, and the cooling medium flows through two electric heaters via a circulating water pressure supply pipe;

[0073] Distributed phase regulator thermal management: according to the requirements of distributed phase regulator thermal protection, the temperature or temperature difference is regulated and controlled by cooling or heating the cooling medium;

[0074] According to the measured value of the inlet main pipe temperature, the start and stop of the industrial frequency fan and the variable frequency fan and the frequency adjustment of the variable frequency fan are controlled, and the first and second groups of variable frequency fans and the third to seventh groups of industrial frequency fans are started in turn to prevent the cooling medium from being too high in temperature and failing to cool the condenser equipment;

[0075] like Figure 2 As shown, the water cooling system is used for temperature regulation of the two phase regulators. The cooling medium passes through the H01 and H02 heaters via the water cooling pipes and runs when the cooling medium temperature is low. According to the measured value of the inlet main pipe temperature, the two electric heaters are started in polling or simultaneously to compensate the cooling medium temperature to prevent the cooling medium temperature from being too low.

[0076] S200: The first control includes making a first judgment according to the measured value of the inlet main pipe temperature. If the measured value of the inlet main pipe temperature is lower than the start temperature of one electric heater set by the distributed control system and higher than the start temperatures of two electric heaters, then after a set delay, polling and starting one electric heater;

[0077] In the embodiment of the present application, when the temperature of the water-cooled inlet main pipe of the distributed phase regulator is lower than the starting temperature of one electric heater and higher than the starting temperature of two electric heaters, the electric heaters are polled and started, and the number of startups is 1;

[0078] The electric heater operates in a cycle switching mode. The switching cycle can be set. When the running time of the electric heater reaches the cycle switching time, another electric heater is started. After the other electric heater is fully started, the electric heater is stopped.

[0079] Specifically, the electric heater is operated when the temperature of the cooling medium is low, the electric heater is started with a delay according to the measured value of the inlet main pipe temperature, and two electric heaters are started in turn or simultaneously to realize temperature compensation for the cooling medium;

[0080] Set a 5-second delay to reduce false starts;

[0081] The cooling medium flows through the two electric heaters through the circulating water pressure supply pipe. When the temperature of the distributed phase-converter water cooling inlet main pipe is lower than the starting temperature of one electric heater and higher than the starting temperature of two electric heaters, a delay of 5 seconds is made to start one electric heater.

[0082] When the temperature of the water-cooling inlet main pipe of the distributed phase regulator is greater than the stop temperature of one electric heater, all electric heaters will be stopped after a delay of 5 seconds.

[0083] S300: Perform a second judgment based on the measured value of the inlet main pipe temperature. If the measured value of the inlet main pipe temperature is lower than the start-up temperature of the two electric heaters set by the distributed control system, the two electric heaters are started at the same time after a set delay.

[0084] In the embodiment of the present application, when the temperature of the water-cooling inlet main pipe of the distributed phase regulator is lower than the starting temperature of the two electric heaters, the two electric heaters are started at the same time, and the number of startups is 2;

[0085] Specifically, when the temperature of the water-cooling inlet main pipe of the distributed phase regulator is higher than the stop temperature of the two electric heaters, a delay of 5 seconds is applied to stop the electric heater with the longest running time;

[0086] When the temperature of the main inlet of the water-cooling pipe of the distributed phase-converter system is higher than the starting temperature of an electric heater, a delay of 5 seconds is made to stop all electric heaters.

[0087] S400: performing a third judgment on the electric heater, the third judgment comprising judging whether the electric heater has a fault;

[0088] In the embodiment of the present application, when the number of startups is 1 and the electric heaters are all fault-free, the main electric heater is started by polling;

[0089] If the main electric heater fails and is in the starting state, the backup electric heater will be started after the set delay. After the backup electric heater is started, the faulty electric heater will be stopped, and the monitoring interface will issue an optical sign alarm and report the fault information;

[0090] When the number of startups is 2 and both electric heaters are not faulty, both electric heaters will be started at the same time;

[0091] If there is an electric heater failure, after a set delay, the normal electric heater is started, the faulty electric heater is stopped, and the monitoring interface issues an optical sign alarm and reports the fault information;

[0092] Specifically, the fault switching mode of the heater is that when one electric heater fails and is being started, another electric heater is started after a delay of 2 seconds. After the startup is completed, the faulty electric heater is stopped and an alarm is issued for the faulty equipment.

[0093] S500: The second control includes performing a fourth judgment on the measured value of the inlet main pipe temperature. If the measured value of the inlet main pipe temperature is greater than the cooling fan start temperature set by the distributed control system, the cooling fan units are started in a round-robin manner until the phase-converter inlet water temperature reaches the target temperature range or all cooling fan units are started;

[0094] In the embodiment of the present application, the cooling fan group is divided into a variable frequency fan and an industrial frequency fan. Assume that the number of cooling fan groups is n, the number of variable frequency fan groups is x, the number of industrial frequency fan groups is nx, and the number of starting fan groups is m, m∈[1,n];

[0095] When m < x, when the temperature of the main inlet pipe of the distributed synchronous condenser is higher than the starting temperature of the m groups of fans and lower than the starting temperature of the m + 1 groups of fans, if all the variable-frequency fans are normal, poll to start the m groups of variable-frequency fans, sort the variable-frequency fan groups according to the cumulative start-up times, and preferentially start the group with the least cumulative start-up times, and start one by one until the m groups of variable-frequency fans are started up;

[0096] When m = x, when the temperature of the main inlet pipe of the distributed synchronous condenser is higher than the starting temperature of the m groups of fans and lower than the starting temperature of the m + 1 groups of fans, start the m groups of variable-frequency fans;

[0097] When m > x, when the temperature of the main inlet pipe of the distributed synchronous condenser is higher than the starting temperature of the m groups of fans and lower than the starting temperature of the m + 1 groups of fans, start the m groups of cooling fans. Preferentially start the variable-frequency fans, and the variable-frequency fan groups and the industrial-frequency fan groups are polled to start respectively, and sort according to the cumulative start-up times, and start one by one the group with the least cumulative start-up times until the m groups of cooling fans are started up.

[0098] Specifically, for the fan start-up principle, it is preferred to start the variable-frequency fans first, and then start the industrial-frequency fans with the least cumulative start-up times according to the remaining number of fans to be started;

[0099] The cooling fan groups are grouped by fan type. For the variable-frequency fans, one variable-frequency selection block control and one industrial-frequency selection block control are adopted; for the industrial-frequency fans, one industrial-frequency selection module is adopted.

[0100] The cooling fans adopt the periodic switching and fault switching operation modes;

[0101] Exemplarily, there are seven groups of cooling fans, among which the variable-frequency fans are the first and second groups, and the industrial-frequency fans are the third to seventh groups;

[0102] When the temperature of the main inlet pipe of the distributed synchronous condenser is higher than the starting temperature of one group of fans and lower than the starting temperature of two groups of fans, automatically start one group of variable-frequency fans. If both groups of variable-frequency fans are normal, select and start the group of variable-frequency fans with the least cumulative start-up times. The target temperature is the starting temperature of one group of fans - 1.5°C, and adopt PID automatic frequency modulation operation;

[0103] When the temperature of the main inlet pipe of the distributed synchronous condenser drops to be lower than the stopping temperature of one group of fans or the variable-frequency fans run continuously at the lowest frequency for 120 s, automatically stop this group of fans;

[0104] When the temperature of the main inlet pipe of the distributed synchronous condenser is higher than the starting temperature of two groups of fans, automatically add and put into another group of variable-frequency fans. The target temperature is the starting temperature of two groups of fans - 1.5°C, and adopt PID to adjust the running frequency of the variable-frequency fans;

[0105] When the temperature of the main inlet pipe of the distributed synchronous condenser drops to be lower than the stopping temperature of two groups of fans, automatically stop the group of variable-frequency fans with the longest running time;

[0106] When the temperature of the inlet main pipe of the distributed synchronous condenser is higher than the starting temperature of the three groups of fans, one group of industrial frequency fans is automatically added and started in a polling manner from the third to the seventh groups of industrial frequency fans. The industrial frequency fan with the least cumulative starting times is preferably selected, and the target temperature is the starting temperature of the three groups of fans - 1.5°C, and the operating frequency of the variable frequency fan is automatically adjusted.

[0107] When the temperature of the inlet main pipe of the distributed synchronous condenser drops below the stopping temperature of the three groups of fans, one group of industrial frequency fan sets with the longest running time is automatically stopped;

[0108] And so on, when the temperature of the inlet main pipe of the distributed synchronous condenser is higher than the starting temperatures of the four groups, five groups, six groups, and seven groups of fans, one more group of industrial frequency fans is automatically put into operation, and the industrial frequency fans are started in a polling manner. The target temperature is the starting temperature of the four groups, five groups, six groups, and seven groups of fans - 1.5°C, and the operating frequency of the variable frequency fan is automatically adjusted;

[0109] In particular, when the temperature sensor of the inlet main pipe of the distributed synchronous condenser fails or the high temperature alarm of the inlet main pipe occurs, all fans are automatically put into operation at industrial frequency;

[0110] It should be noted that the periodic switching operation mode takes into account the full-cycle life management of the equipment. Aiming at the problem that the long-term intermittent operation of a single cooling fan affects the service life cycle, a periodic switching operation mode for the cooling fan group is proposed to realize the alternating operation and periodic switching of the cooling fans.

[0111] S600: Make a fifth judgment on the cooling fan group. The fifth judgment includes judging whether there is a fault in the cooling fan group. If a fault occurs, a light sign alarm is issued on the monitoring interface and the fault information is reported;

[0112] In the embodiment of the present application, the variable frequency fan includes a variable frequency circuit and an industrial frequency circuit;

[0113] The industrial frequency fan only has an industrial frequency circuit. If the variable frequency circuit of the variable frequency fan fails, the industrial frequency bypass operation is started without frequency modulation, and the fan can still be normally started through the industrial frequency circuit and then regarded as an industrial frequency fan for operation;

[0114] There are p groups of variable frequency circuits of the variable frequency fan that fail, where p ∈ [1, x];

[0115] When m < x, if p groups of variable frequency circuits of the variable frequency fan fail and p ≤ x - m, then m groups are selected from the remaining x - p groups of variable frequency fans without faults and started in a polling manner;

[0116] When m < x, if the frequency conversion circuit of the p groups of variable frequency fans fails and p > x - m, start the x - p groups of variable frequency fans without faults and m - (x - p) groups of industrial frequency fans. Give priority to starting the variable frequency fans, and the variable frequency fan groups and industrial frequency fan groups are started in a polling manner respectively. Sort according to the cumulative start times and start the unit with the least cumulative start times one by one until m groups of cooling fans are started or all normal fans are started;

[0117] When m = x, if the frequency conversion circuit of the p groups of variable frequency fans fails and p < x, start the x - p groups of variable frequency fans without faults and p groups of industrial frequency fans. Give priority to starting the variable frequency fans, and the variable frequency fan groups and industrial frequency fan groups are started in a polling manner respectively. Sort according to the cumulative start times and start the unit with the least cumulative start times one by one until m groups of cooling fans are started or all normal fans are started;

[0118] When m = x, if the frequency conversion circuit of the p groups of variable frequency fans fails and p = x, start m groups of industrial frequency fans. The industrial frequency fan groups are started in a polling manner. Sort according to the cumulative start times and start the industrial frequency fan group with the least cumulative start times one by one until m groups of cooling fans are started or all normal fans are started;

[0119] When m > x, if the frequency conversion circuit of the p groups of variable frequency fans fails and p < x, start the x - p groups of variable frequency fans without faults and m - (x - p) groups of industrial frequency fans. Give priority to starting the variable frequency fans, and the variable frequency fan groups and industrial frequency fan groups are started in a polling manner respectively. Sort according to the cumulative start times and start the unit with the least cumulative start times one by one until m groups of cooling fans are started or all normal fans are started;

[0120] When m > x, if the frequency conversion circuit of p variable frequency fans fails and p = x, start m groups of industrial frequency fans without faults. The industrial frequency fan groups are started in a polling manner. Sort according to the cumulative start times and start the industrial frequency fan group with the least cumulative start times one by one until m groups of cooling fans are started or all normal fans are started.

[0121] In the embodiment of the present application, if both the frequency conversion circuit and the industrial frequency circuit of the variable frequency fan fail, only start in a polling manner from the industrial frequency fan groups;

[0122] Sort according to the cumulative start times and start the industrial frequency fans with the least cumulative start times one by one until m groups of cooling fans are started or all normal fans are started.

[0123] Exemplarily, when the total inlet pipe temperature of the distributed synchronous condenser is greater than the start temperature of one group of fans and less than the start temperature of two groups of fans, start one group of variable frequency fans. If the frequency conversion circuit of this group of variable frequency fans fails, select another group of variable frequency fans to start. If the frequency conversion circuits of both groups of variable frequency fans fail, start one group of industrial frequency fans with the least cumulative start times;

[0124] When the temperature of the main pipe at the inlet of the distributed phase-converter is greater than the starting temperature of the two groups of fans and less than the starting temperature of the three groups of fans, the two groups of variable frequency fans are started first. If the frequency conversion circuit of one group of variable frequency fans fails, the other group of normal variable frequency fans is started and then one group of industrial frequency fans from the third to seventh groups is started in turn. If the frequency conversion circuits of both groups of variable frequency fans fail, the two groups of industrial frequency fans are started in turn, and the industrial frequency fans from the third to seventh groups are sorted by the running time, and the industrial frequency fans with the least cumulative start times are started in turn.

[0125] When the temperature of the distributed phase-converter inlet main pipe is greater than the starting temperature of the three groups of fans, two groups of variable frequency fans are started first, and then one group is started in turn from the third to seventh groups of industrial frequency fans; if the frequency conversion circuit of one group of variable frequency fans fails, the other group of normal variable frequency fans is started and then two groups are started in turn from the third to seventh groups of industrial frequency fans; if the frequency conversion circuits of both groups of variable frequency fans fail, the three groups of industrial frequency fans are started in turn, and the industrial frequency fans of the third to seventh groups are sorted according to the running time, and the industrial frequency fans with the least cumulative start times are started in turn.

[0126] It should be noted that the fault switching operation mode is a fault-tolerant mechanism. Even if a cooling air unit fails, the DCS immediately issues a command to start other cooling air units that can be started normally to ensure the normal thermal protection of the distributed phase regulator.

[0127] S700: obtaining a real-time inlet main pipe temperature measurement value, and performing a sixth judgment based on the real-time inlet main pipe temperature measurement value. If the real-time inlet main pipe temperature measurement value is lower than the cooling fan stop temperature set by the distributed control system, the cooling fans are stopped in a stepwise manner until the last group of cooling fans is stopped.

[0128] In the embodiment of the present application, when the temperature drops and reaches the cooling fan stop temperature, the started power-frequency fans are preferentially selected for shutdown according to the number of fans to be stopped corresponding to the stop temperature, and the principle is first started first stopped, that is, the power-frequency fan with the longest cumulative running time is stopped;

[0129] When the industrial frequency fan cannot be shut down due to a control loop disconnection, the distributed control system background issues a shutdown failure alarm;

[0130] If none of the industrial frequency fans meet the stopping conditions, then the variable frequency fans will be stopped. The principle is that the first-start-first-stop, that is, the variable frequency fan with the longest cumulative running time will be stopped.

[0131] Specifically, when the temperature of the inlet main pipe of the distributed phase regulator drops and reaches the stop temperature of the cooling fan, the fans in the third to seventh groups are selected according to the number of fans that need to be stopped corresponding to the stop temperature. The principle is to start first and stop first, that is, stop the fan with the longest cumulative running time. When the third to seventh groups of fans fail and do not meet the stopping conditions, the first and second groups of variable frequency fans are stopped.

[0132] Exemplarily, when the temperature of the main pipe at the inlet of the distributed phase regulator is lower than the stop temperature of a group of fans or the variable frequency fan runs at the lowest frequency for 120 seconds continuously, the group of fans is stopped;

[0133] When the temperature of the main pipe at the inlet of the distributed phase regulator is lower than the stop temperature of the two groups of fans, one group of variable frequency fans will be stopped based on the first-start-first-stop principle, that is, the group with the longest cumulative running time will be stopped;

[0134] When the temperature of the main pipe at the inlet of the distributed phase regulator is lower than the stop temperature of the three groups of fans, the group of industrial frequency fans with the longest running time will be stopped.

[0135] The above is a schematic scheme of a temperature optimization control method for a water-cooled distributed phase condenser in this embodiment. It should be noted that the technical scheme of the temperature optimization control device for the water-cooled distributed phase condenser and the technical scheme of the temperature optimization control method for the water-cooled distributed phase condenser described above belong to the same concept. For details not described in detail in the technical scheme of the temperature optimization control device for the water-cooled distributed phase condenser in this embodiment, please refer to the description of the technical scheme of the temperature optimization control method for the water-cooled distributed phase condenser described above.

[0136] The device for temperature optimization control of the water-cooled distributed phase regulator in this embodiment includes:

[0137] A sensor module, used to detect non-electrical signals and convert them into electrical signals;

[0138] The controller module is responsible for receiving the signals sent by the sensor and sending instructions to control the actuator to keep the temperature of the external cooling water system of the distributed phase regulator stable;

[0139] The actuator module is used for heating or cooling the circulating medium and executing the instructions issued by the controller module.

[0140] The main body of the sensor module is a temperature measurement circuit, which contains a temperature sensor. The temperature sensor is installed at the inlet of the water cooling pipeline of the cooling equipment to measure the temperature of the water cooling inlet main pipe of the phase shifter.

[0141] The controller module is divided into a main control module and a slave control module. The main control module performs logical operations and outputs control instructions according to the data sent by the slave control module.

[0142] The slave controller module is responsible for sending the data collected by the sensor module, reporting the status of the temperature control loop to the master control module, and performing data exchange;

[0143] The temperature control loop includes a transmitter. When the physical quantity detection signal of the transmitter exceeds the alarm value, an alarm message is returned to the background monitoring of the distributed control system.

[0144] This embodiment further provides a computing device, which is applicable to the temperature optimization control of a water-cooled distributed phase regulator, including:

[0145] Memory and processor; the memory is used to store computer executable instructions, and the processor is used to execute computer executable instructions to implement the temperature optimization control method for water-cooled distributed phase regulator as proposed in the above embodiment.

[0146] This embodiment further provides a storage medium on which a computer program is stored. When the program is executed by a processor, the temperature optimization control method for a water-cooled distributed phase regulator as proposed in the above embodiment is implemented.

[0147] The storage medium proposed in this embodiment and the temperature optimization control method for realizing water-cooled distributed phase regulator proposed in the above embodiment belong to the same inventive concept. The technical details not fully described in this embodiment can be referred to the above embodiment, and this embodiment has the same beneficial effects as the above embodiment.

[0148] Through the above description of the implementation methods, the technicians in the relevant field can clearly understand that the present invention can be implemented by means of software and necessary general hardware, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ReadOnly, Memory, ROM), random access memory (RandomAccess Memory, RAM), flash memory (FLASH), hard disk or optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform the methods of various embodiments of the present invention.

[0149] Example 2

[0150] Reference Figure 3 This embodiment is different from the first embodiment in that it provides a verification test of a temperature optimization control method for a water-cooled distributed phase regulator to verify and illustrate the technical effects used in this method.

[0151] The application of 50MVar distributed phase regulator in a booster station is as follows:

[0152] The starting temperature of two sets of heaters is 12℃, the starting temperature of one set of heaters is 14℃, the stopping temperature of one set of heaters is 16℃, the stopping temperature of two sets of heaters is 18℃, the cycle switching setting time is 168h, and the cycle switching polling start is realized by the main and standby identification method;

[0153] The start and stop control of the heater group is that by default one group of heaters is the main one and one group of heaters is the backup one;

[0154] When the inlet main pipe temperature is lower than 14℃ and higher than 12℃, the standby heater is started. After successful startup, the standby heater becomes the main heater and the original main heater becomes the standby heater;

[0155] When it lasts for more than 168 hours, the cycle is switched, the heater group currently marked as the main heater is stopped, and the heater group currently marked as the backup heater is started. After the startup is successful, the backup heater group becomes the main heater group, and the original main heater group becomes the backup heater group;

[0156] When the switching cycle time has not been reached, but the main heater group being started fails, the standby heater group will be started after a delay of 2 seconds. After the startup is completed, the faulty heater will be stopped and an alarm will be issued for the faulty equipment.

[0157] When the inlet main pipe temperature is lower than 12℃, start the standby heater. After successful startup, the standby heater becomes the main heater and the original main heater becomes the standby heater. At this time, continue to start the standby heater group, and the main and standby relationship does not change;

[0158] When the inlet main pipe temperature rises due to the heater and is greater than 16 degrees and less than 18 degrees, the heater group currently marked as the main one will be stopped. The main heater group will become the standby heater group, and the standby heater group will become the main one;

[0159] When the inlet main pipe temperature continues to rise by more than 18 degrees, the heater group currently marked as the main one will be stopped, and the main and standby relationships will not change.

[0160] Design a control algorithm block to record the number of device operations and automatically select the device with the smallest number of operations for the polling start-stop operation mode of the cooling fan unit. The device selection algorithm function block is as follows: Figure 3As shown. The module automatically records the number of times the device is started. The device operation status ranges from 1 to 0, which means it is started once. NUM represents the number of devices that need to be started, OnEn represents whether the device is allowed to start, and FB represents the operation status of the device. When the devices are not started at the first power-on, the number of device startups is 0. The module starts the corresponding number of devices in the order of the startable devices. If the device fails to start after the timeout, the next device will be automatically started. During operation, when the number of NUM increases, the module will give priority to starting the device with the smallest number of startable runs according to the corresponding number of runs of the devices recorded internally. If the device fails to start after the timeout, the next device will be automatically started.

[0161] The control process of the cooling fan unit is as follows:

[0162] When the inlet main pipe temperature is higher than 27℃ and lower than 30℃, the frequency conversion selection module selects the frequency conversion fan and uses PID automatic frequency regulation to operate with a target temperature of 25.5℃.

[0163] When the inlet main pipe temperature is lower than 25.5℃ or the variable frequency fan runs at the lowest frequency for 120 seconds continuously, the fan group will stop automatically.

[0164] When the power frequency fan fails, the power frequency operation is adopted for the frequency conversion failure. When the frequency conversion circuit of one frequency conversion fan fails, the other frequency conversion fan is started first. If both the frequency conversion circuit and the power frequency circuit fail, the fan cannot be put into operation. The OnEn pin of the selection module is used for control. When the frequency conversion circuits of the two frequency conversion fans are normal or only one frequency conversion circuit fails, the frequency conversion selection module NUM is set to 1, the bypass selection module NUM is set to 0, and the power frequency selection module NUM is set to 0; when the frequency conversion circuits of the two frequency conversion fans fail, the frequency conversion selection module NUM is set to 0, the bypass selection module NUM is set to 1, and the power frequency selection module NUM is set to 0; when the frequency conversion circuits and power frequency circuits of the two frequency conversion fans fail, the frequency conversion selection module NUM is set to 0, the bypass selection module NUM is set to 0, and the power frequency selection module NUM is set to 1.

[0165] When the inlet main pipe temperature is higher than 30℃ and lower than 33℃, another set of variable frequency fans will be automatically added and the operating frequency of the variable frequency fans will be adjusted by PID. The target temperature is 28.5℃.

[0166] When the inlet main pipe temperature is lower than 28.5℃, the fan with the longest running time will be automatically stopped. If variable frequency and industrial frequency fans are running at the same time, the industrial frequency fan will be stopped first.

[0167] When the inlet main pipe temperature is higher than 33℃, 36℃, 39℃, 42℃, and 45℃, 3, 4, 5, 6, and 7 groups of fans will be started in sequence, and the target temperature is the starting temperature minus 1.5℃.

[0168] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A temperature optimization control method for a water-cooled distributed phase regulator, characterized in that: include: Obtaining a measured value of the inlet main pipe temperature, and controlling the temperature of the distributed phase regulator according to the measured value of the inlet main pipe temperature, wherein the control includes a first control and a second control; The first control includes making a first judgment based on the measured value of the inlet main pipe temperature, if the measured value of the inlet main pipe temperature is lower than the start temperature of one electric heater set by the distributed control system and higher than the start temperature of two electric heaters, then after a set delay, polling and starting one electric heater; A second judgment is made based on the measured value of the inlet main pipe temperature. If the measured value of the inlet main pipe temperature is lower than the start-up temperature of the two electric heaters set by the distributed control system, the two electric heaters are started at the same time after a set delay. Performing a third judgment on the electric heater, the third judgment comprising: judging whether the electric heater has a fault; The second control includes performing a fourth judgment on the measured value of the inlet main pipe temperature, and if the measured value of the inlet main pipe temperature is greater than the cooling fan start temperature set by the distributed control system, polling and starting the cooling fan units until the phase-converting phase inlet water temperature reaches the target temperature range or all cooling fan units are started; Performing a fifth judgment on the cooling air unit, the fifth judgment comprising judging whether there is a fault in the cooling air unit, and if a fault occurs, a monitoring interface issues an optical sign alarm and reports fault information; Obtain a real-time inlet main pipe temperature measurement value, and perform a sixth judgment based on the real-time inlet main pipe temperature measurement value. If the real-time inlet main pipe temperature measurement value is lower than the cooling fan stop temperature set by the distributed control system, the sixth judgment result is to stop the cooling fans in a step-by-step manner until the last group of cooling fans is stopped.

2. The temperature optimization control method of the water-cooled distributed phase regulator according to claim 1, characterized in that: Performing a first judgment and a second judgment according to the measured value of the inlet main pipe temperature includes: When the temperature of the water-cooling inlet main pipe of the distributed phase-converter is lower than the starting temperature of one electric heater and higher than the starting temperature of two electric heaters, the electric heaters will be started in turn, and the number of start-ups is 1; The electric heater operates in a cycle switching mode. The switching cycle can be set. When the running time of the electric heater reaches the cycle switching time, another electric heater is started. After the other electric heater is fully started, the electric heater is stopped. When the temperature of the water-cooling inlet main pipe of the distributed phase regulator is lower than the starting temperature of the two electric heaters, the two electric heaters will be started at the same time, and the number of startups is 2.

3. The temperature optimization control method of a water-cooled distributed phase regulator according to claim 1 or 2, characterized in that: The third determination on the electric heater includes: When the number of startups is 1 and the electric heaters are all fault-free, the main electric heater is started in turn; If the main electric heater fails and is in the starting state, the backup electric heater will be started after the set delay. After the backup electric heater is started, the faulty electric heater will be stopped, and the monitoring interface will issue an optical sign alarm and report the fault information; When the number of startups is 2 and both electric heaters are not faulty, both electric heaters will be started at the same time; If there is an electric heater failure, after a set delay, the normal electric heater is started and the faulty electric heater is stopped. The monitoring interface issues an optical sign alarm and reports the fault information.

4. The temperature optimization control method of a water-cooled distributed phase regulator according to claim 1, characterized in that: The fourth determination of the measured value of the inlet main pipe temperature includes: Divide the cooling fan group into variable-frequency fans and industrial-frequency fans. Let the number of cooling fan groups be n, the number of variable-frequency fan groups be x, and the number of industrial-frequency fan groups be n - x. The number of started fan groups is m, where m ∈ [1, n]. When m < x, if the total temperature at the inlet main pipe of the distributed synchronous condenser is higher than the starting temperature of m groups of fans and lower than the starting temperature of m + 1 groups of fans, and if all variable-frequency fans are normal, then poll and start m groups of variable-frequency fans. Sort the variable-frequency fan groups according to the cumulative start times, and preferentially start the group with the least cumulative start times. Start one by one until m groups of variable-frequency fans are started. When m = x, if the total temperature at the inlet main pipe of the distributed synchronous condenser is higher than the starting temperature of m groups of fans and lower than the starting temperature of m + 1 groups of fans, start m groups of variable-frequency fans. When m > x, if the total temperature at the inlet main pipe of the distributed synchronous condenser is higher than the starting temperature of m groups of fans and lower than the starting temperature of m + 1 groups of fans, start m groups of cooling fans. Preferentially start variable-frequency fans, and poll and start the variable-frequency fan groups and industrial-frequency fan groups separately. Sort according to the cumulative start times, and start one by one the group with the least cumulative start times until m groups of cooling fans are started.

5. The temperature optimization control method of the water-cooled distributed phase regulator according to claim 4, characterized in that: The fifth judgment on the cooling fan group includes: The variable-frequency fan includes a variable-frequency circuit and an industrial-frequency circuit. The industrial-frequency fan only has an industrial-frequency circuit. If the variable-frequency circuit of the variable-frequency fan fails, start the industrial-frequency bypass operation without frequency modulation. The fan can still be normally started through the industrial-frequency circuit and then be regarded as an industrial-frequency fan for operation. Suppose there are p groups of variable-frequency fans with variable-frequency circuit failures, where p ∈ [1, x]. When m < x, if there are p groups of variable-frequency fans with variable-frequency circuit failures and p ≤ x - m, select m groups from the remaining x - p groups of variable-frequency fans without failures and poll and start them. When m < x, if there are p groups of variable-frequency fans with variable-frequency circuit failures and p > x - m, start x - p groups of variable-frequency fans without failures and m - (x - p) groups of industrial-frequency fans. Preferentially start variable-frequency fans, and poll and start the variable-frequency fan groups and industrial-frequency fan groups separately. Sort according to the cumulative start times, and start one by one the group with the least cumulative start times until m groups of cooling fans are started or all normal fans are started. When m = x, if there are p groups of variable-frequency fans with variable-frequency circuit failures and p < x, start x - p groups of variable-frequency fans without failures and p groups of industrial-frequency fans. Preferentially start variable-frequency fans, and poll and start the variable-frequency fan groups and industrial-frequency fan groups separately. Sort according to the cumulative start times, and start one by one the group with the least cumulative start times until m groups of cooling fans are started or all normal fans are started. When m = x, if there are p groups of variable-frequency fans with variable-frequency circuit failures and p = x, start m groups of industrial-frequency fans. Poll and start the industrial-frequency fan groups. Sort according to the cumulative start times, and start one by one the industrial-frequency fan group with the least cumulative start times until m groups of cooling fans are started or all normal fans are started. When m > x, if the frequency conversion circuit of the p groups of variable-frequency fans fails and p < x, then start x - p groups of variable-frequency fans without faults and m - (x - p) groups of industrial-frequency fans. Priority is given to starting the variable-frequency fans, and the variable-frequency fan groups and industrial-frequency fan groups are started in a polling manner. They are sorted according to the cumulative start-up times, and the units with the least cumulative start-up times are started one by one until m groups of cooling fans are started or all normal fans are started; When m > x, if the frequency conversion circuits of p variable-frequency fans fail and p = x, then start m groups of industrial-frequency fans without faults. The industrial-frequency fan groups are started in a polling manner. They are sorted according to the cumulative start-up times, and the industrial-frequency fan groups with the least cumulative start-up times are started one by one until m groups of cooling fans are started or all normal fans are started.

6. The temperature optimization control method of a water-cooled distributed phase regulator according to claim 5, characterized in that: The fifth judgment on the cooling fan group further includes: If both the frequency conversion circuit and the industrial-frequency circuit of the variable-frequency fan fail, then start only from the industrial-frequency fan group in a polling manner; They are sorted according to the cumulative start-up times, and the industrial-frequency fans with the least cumulative start-up times are started one by one until m groups of cooling fans are started or all normal fans are started.

7. The temperature optimization control method of a water-cooled distributed phase regulator according to claim 6, characterized in that: The sixth judgment according to the measured value of the real-time inlet main pipe temperature includes: When the temperature drops and reaches the cooling fan stop temperature, according to the number of fans to be stopped corresponding to the stop temperature, give priority to selecting the industrial-frequency fans that have been started for shutdown. The principle is to stop the ones that are started first, that is, stop the industrial-frequency fan with the longest current cumulative operation duration; When the industrial-frequency fan cannot be shut down due to a broken control circuit, the distributed control system background issues a shutdown failure fault warning; If none of the industrial-frequency fans meet the stop conditions, then stop the variable-frequency fans. The principle is to stop the ones that are started first, that is, stop the variable-frequency fan with the longest current cumulative operation duration.

8. A system for temperature optimization control method of water-cooled distributed phase regulator, characterized in that: It includes: A sensor module for detecting non-electric signals and converting them into electric signals; A controller module for receiving the signals sent by the sensors and sending instructions to control the actuator to act, so as to keep the temperature of the external cooling water system of the distributed synchronous condenser stable; An actuator module for heating or cooling the circulating medium and executing the instructions issued by the controller module.

9. The system of the temperature optimization control method of the water-cooled distributed phase regulator according to claim 8, characterized in that: It includes: The main body of the sensor module is a temperature measurement circuit, which contains a temperature sensor. The temperature sensor is installed at the inlet of the water-cooled pipe of the cooling equipment to measure the temperature of the inlet main pipe of the synchronous condenser water cooling.

10. The system of the temperature optimization control method of the water-cooled distributed phase regulator according to claim 8, characterized in that: It includes: The controller module is divided into a main control module and a slave control module. The main control module performs logical operations based on the data sent by the slave control module and outputs control instructions; The slave controller module is responsible for sending the data collected by the sensor module, reporting the status of the temperature control circuit to the main control module, and performing data exchange; The temperature control circuit includes a transmitter. When the physical quantity detection signal of the transmitter exceeds the alarm value, it returns an alarm message to the background monitoring of the distributed control system.

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