CN108956184A - A kind of transformer forced oil air-cooled cooler radiating efficiency quantitative determination method and device - Google Patents
A kind of transformer forced oil air-cooled cooler radiating efficiency quantitative determination method and device Download PDFInfo
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Abstract
Description
技术领域technical field
本申请涉及变压器技术领域，尤其涉及一种变压器强油风冷冷却器散热效率量化测定方法及装置。The present application relates to the technical field of transformers, in particular to a quantitative measurement method and device for heat dissipation efficiency of a transformer strong oil air-cooled cooler.
背景技术Background technique
变压器是电网中的关键设备，其在运行中会因空负载损耗产生大量热量。为维持变压器自身的热平衡，通过变压器油带走热量，再利用冷却器将热量传递空气中。参阅图1，变压器油箱1中的热油经进油管2进入最强油风冷却器3中，热油在最强油风冷却器3中被冷却，形成的冷油经回油管4和油泵5再次进入变压器油箱中吸收变压器产生的热量，由此构成冷却循环，其中，每组冷却器均设有冷却器风扇6。Transformer is a key equipment in the power grid, which will generate a lot of heat due to no-load loss during operation. In order to maintain the thermal balance of the transformer itself, the heat is taken away by the transformer oil, and then the heat is transferred to the air by the cooler. Referring to Figure 1, the hot oil in the transformer oil tank 1 enters the strongest oil air cooler 3 through the oil inlet pipe 2, and the hot oil is cooled in the strongest oil air cooler 3, and the formed cold oil passes through the oil return pipe 4 and the oil pump 5 Enter the transformer oil tank again to absorb the heat generated by the transformer, thereby forming a cooling cycle, wherein each group of coolers is equipped with a cooler fan 6 .
在变压器及其冷却器的实际运行中，曾因冷却器效率降低，油温升高引起变压器油膨胀加剧，油位升高、内部压力增大导致压力释放阀动作，发生变压器被迫停运检查的情况。对于变压器冷却器的维护措施，能源局反措(2014版)要求：“12.6.10为保证冷却效果，管状结构变压器冷却器每年应进行1～2次冲洗，并宜安排在大负荷来临前进行”。然而实际上，由于变压器运行环境的不同，冷却器脏污堵塞情况差异明显，如果按照既定的冲洗周期对冷却器进行冲洗是比较盲目的，不利于变压器的安全稳定经济运行。In the actual operation of the transformer and its cooler, the efficiency of the cooler decreased, the oil temperature increased, causing the transformer oil to expand, the oil level increased, and the internal pressure increased, causing the pressure relief valve to operate, and the transformer was forced to stop for inspection. Case. For the maintenance measures of the transformer cooler, the countermeasures of the Energy Bureau (2014 edition) require: "12.6.10 In order to ensure the cooling effect, the tubular structure transformer cooler should be flushed once or twice a year, and it should be arranged before the heavy load comes" . However, in fact, due to the different operating environments of transformers, the dirt and clogging of coolers are significantly different. It is blind to flush the coolers according to the established flushing cycle, which is not conducive to the safe, stable and economical operation of transformers.
发明内容Contents of the invention
本申请提供一种变压器强油风冷冷却器散热效率量化测定方法及装置，以解决现有按照既定的冲洗周期对冷却器进行冲洗，存在冷却器欠维护或过维护的问题。The present application provides a quantitative measurement method and device for the heat dissipation efficiency of a transformer strong oil air-cooled cooler, so as to solve the existing problem of under-maintenance or over-maintenance of the cooler when the cooler is flushed according to a predetermined flushing cycle.
第一方面，本申请提供了一种变压器强油风冷冷却器散热效率量化测定方法，该方法包括：In the first aspect, the application provides a method for quantifying the heat dissipation efficiency of a transformer strong oil air-cooled cooler, the method comprising:
测量运行中的单组变压器冷却器的当前设备温度；Measure the current equipment temperature of a single transformer cooler in operation;
根据所述冷却器的当前设备温度确定所述冷却器的散热功率，并对所述散热功率进行额定修正；determining the heat dissipation power of the cooler according to the current equipment temperature of the cooler, and performing a rated correction on the heat dissipation power;
根据所述额定修正后的散热功率确定所述冷却器的散热效率，并对所述散热效率进行环境修正；determining the heat dissipation efficiency of the cooler according to the rated corrected heat dissipation power, and performing an environmental correction on the heat dissipation efficiency;
根据所述环境修正后的冷却器散热效率与预设的散热效率下限值，输出报警信号。An alarm signal is output according to the corrected heat dissipation efficiency of the cooler in the environment and the preset lower limit value of heat dissipation efficiency.
进一步，所述冷却器的当前设备温度包括进油管外壁温度、回油管外壁温度和进风口空气温度；所述根据冷却器的当前设备温度确定冷却器的散热功率，包括按照下式计算得到冷却器的散热功率：Further, the current equipment temperature of the cooler includes the outer wall temperature of the oil inlet pipe, the outer wall temperature of the oil return pipe, and the air temperature of the air inlet; the determination of the cooling power of the cooler according to the current equipment temperature of the cooler includes calculating the cooler according to the following formula: cooling power:
P＝Q×ρ×C×(T0-Ti)P=Q×ρ×C×(T 0 -T i )
式中，P表示单组冷却器的散热功率；In the formula, P represents the heat dissipation power of a single cooler;
Q表示变压器油的流量；Q represents the flow rate of transformer oil;
ρ表示(T0-Ti)/2温度下的变压器油密度；ρ represents the transformer oil density at (T 0 -T i )/2 temperature;
C表示(T0-Ti)/2温度下的变压器油比热容；C represents the specific heat capacity of transformer oil at (T 0 -T i )/2 temperature;
T0表示进油管外壁温度；T 0 represents the temperature of the outer wall of the oil inlet pipe;
Ti表示回油管外壁温度。T i represents the temperature of the outer wall of the oil return pipe.
进一步，所述对散热功率进行额定修正，包括：以进油管外壁温度T0代替进油管油温，根据所述冷却器的额定散热功率的测定条件，按照下式将所述散热功率修正为所述测定条件下的散热功率：Further, the rated correction of the heat dissipation power includes: replacing the oil temperature of the oil inlet pipe with the temperature T0 of the outer wall of the oil inlet pipe, and according to the measurement conditions of the rated heat dissipation power of the cooler, the heat dissipation power is corrected according to the following formula: Heat dissipation power under the above measurement conditions:
式中，P修正表示额定修正后的散热功率；In the formula, P correction represents the heat dissipation power after rated correction;
Ta表示冷却器的进风口空气温度。T a represents the air inlet air temperature of the cooler.
进一步，所述根据额定修正后的散热功率确定所述冷却器的散热效率，并对所述散热效率进行环境修正，包括按照下式确定冷却器的散热效率并进行环境修正：Further, the determining the heat dissipation efficiency of the cooler according to the rated corrected heat dissipation power, and performing environmental correction on the heat dissipation efficiency includes determining the heat dissipation efficiency of the cooler according to the following formula and performing environmental correction:
其中，η表示环境修正后的散热效率；Among them, η represents the heat dissipation efficiency after environmental correction;
Pn表示冷却器在所述当前设备温度下的额定散热效率；P n represents the rated heat dissipation efficiency of the cooler at the current equipment temperature;
λ表示海拔修正因子，σ表示太阳辐射修正因子。λ represents the altitude correction factor, and σ represents the solar radiation correction factor.
进一步，所述根据环境修正后的冷却器散热效率η与预设的散热效率下限值τ，输出报警信号，包括：Further, the output of an alarm signal according to the corrected heat dissipation efficiency η of the cooler and the preset lower limit value τ of heat dissipation efficiency according to the environment includes:
判断所述环境修正后的冷却器散热效率η是否小于预设的散热效率下限值τ；Judging whether the heat dissipation efficiency η of the cooler after the environmental correction is less than the preset heat dissipation efficiency lower limit value τ;
如果所述环境修正后的冷却器散热效率η小于预设的散热效率下限值τ，则输出冷却器散热异常预警信号；If the heat dissipation efficiency η of the cooler after the environmental correction is less than the preset lower limit value τ of heat dissipation efficiency, an abnormal warning signal for heat dissipation of the cooler is output;
如果所述环境修正后的冷却器散热效率η大于或等于预设的散热效率下限值τ，则输出冷却器散热正常信号。If the heat dissipation efficiency η of the cooler after the environmental correction is greater than or equal to the preset lower limit value τ of heat dissipation efficiency, a normal signal of heat dissipation of the cooler is output.
进一步，所述方法还包括：Further, the method also includes:
如果输出冷却器散热异常信号，检查冷却器油泵以及冷却扇的工作状态；If the cooler heat dissipation abnormal signal is output, check the working status of the cooler oil pump and cooling fan;
如果所述冷却器油泵及冷却器风扇的工作状态异常，输出油泵或风扇需维护信号；If the working state of the cooler oil pump and the cooler fan is abnormal, output a signal that the oil pump or the fan needs to be maintained;
如果所述冷却器油泵及冷却器风扇的工作状态正常，输出冷却器需冲洗维护信号。If the cooler oil pump and the cooler fan are in normal working condition, a cooler needs to be flushed maintenance signal is output.
第二方面，本申请提供了一种变压器强油风冷冷却器散热效率量化测定装置，该装置包括：In the second aspect, the present application provides a device for quantifying the heat dissipation efficiency of a transformer strong oil air-cooled cooler, the device comprising:
温度测量单元，用于测量运行中的变压器冷却器的当前设备温度；A temperature measuring unit for measuring the current equipment temperature of the transformer cooler in operation;
第一计算单元，用于根据所述冷却器的当前设备温度确定所述冷却器的散热功率，并对所述散热功率进行额定修正；A first calculation unit, configured to determine the heat dissipation power of the cooler according to the current equipment temperature of the cooler, and perform a rated correction on the heat dissipation power;
第二计算单元，用于根据所述额定修正后的散热功率确定所述冷却器的散热效率，并对所述散热效率进行环境修正；A second calculation unit, configured to determine the heat dissipation efficiency of the cooler according to the rated corrected heat dissipation power, and perform environmental correction on the heat dissipation efficiency;
报警单元，用于根据所述环境修正后的冷却器散热效率与预设的散热效率下限值，输出报警信号。The alarm unit is configured to output an alarm signal according to the corrected cooling efficiency of the cooler in the environment and the preset lower limit value of the cooling efficiency.
由以上技术方案可知，本申请提供一种强油风冷变压器冷却器散热效率量化测定方法及装置，其中，所述方法以单组强油风冷冷却器为对象，通过现场测量运行中的单组冷却器的进油管、回油管、进风口的当前温度数据，并引入海拔、太阳辐射修正因子，计算得到单组冷却器当前的散热效率值；通过比较散热效率值与预设的散热效率下限值，当散热效率值低于预设的散热效率下限值时，在排除冷却器油泵、风扇问题引起后，可确定为冷却器脏污引起散热效率降低，需对冷却器翅片进行冲洗。本申请方法及装置实现了对单组强油风冷冷却器散热效率的量化评估，考虑了海拔、太阳辐射因素，准确性高，有效避免了以往冷却器维护的盲目性。It can be known from the above technical solutions that the present application provides a quantitative measurement method and device for the heat dissipation efficiency of a strong oil air-cooled transformer cooler, wherein the method takes a single group of strong oil air-cooled The current temperature data of the oil inlet pipe, oil return pipe, and air inlet of the group cooler, and the altitude and solar radiation correction factors are introduced to calculate the current heat dissipation efficiency value of the single group cooler; by comparing the heat dissipation efficiency value with the preset heat dissipation efficiency Limit value, when the heat dissipation efficiency value is lower than the preset heat dissipation efficiency lower limit value, after eliminating the problem caused by the oil pump and fan of the cooler, it can be determined that the heat dissipation efficiency is reduced due to the dirty cooler, and the cooler fins need to be flushed . The method and device of the present application realize the quantitative evaluation of the heat dissipation efficiency of a single group of strong oil air-cooled coolers, taking into account the factors of altitude and solar radiation, with high accuracy, and effectively avoiding the blindness of previous cooler maintenance.
附图说明Description of drawings
为了更清楚地说明本申请的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，对于本领域普通技术人员而言，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。In order to illustrate the technical solution of the present application more clearly, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, on the premise of not paying creative labor, Additional drawings can also be derived from these drawings.
图1为本申请实施例示出的一种变压器单组强油风冷冷却器的结构示意图；Fig. 1 is a schematic structural view of a transformer single group strong oil air-cooled cooler shown in the embodiment of the present application;
图2为本申请根据一示例性实施例示出的一种变压器强油风冷冷却器散热效率量化测定方法流程图；Fig. 2 is a flow chart of a quantitative measurement method for heat dissipation efficiency of a transformer strong oil air-cooled cooler according to an exemplary embodiment of the present application;
图3为本申请根据一示例性实施例示出的一种变压器强油风冷冷却器散热效率量化测定装置框图。Fig. 3 is a block diagram of a quantitative measurement device for heat dissipation efficiency of a transformer strong oil air-cooled cooler according to an exemplary embodiment of the present application.
具体实施方式Detailed ways
为了使本技术领域的人员更好地理解本发明中的技术方案，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都应当属于本发明保护的范围。In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.
本申请实施例提供一种变压器强油风冷冷却器散热效率量化测定方法，该方法至少适用于强油风冷却器的使用场景，以变压器单组最强油风冷却器为对象，对其散热效率进行在线量化测定，并综合考虑安装地海拔、太阳辐射等因素，以便于指导变压器维护，避免维护不当诱发不安全事件。The embodiment of the present application provides a quantitative measurement method for the heat dissipation efficiency of the strong oil-air cooler of a transformer. The efficiency is quantitatively measured online, and factors such as the altitude of the installation site and solar radiation are considered comprehensively, so as to guide the maintenance of the transformer and avoid unsafe incidents caused by improper maintenance.
参阅图2，该方法包括下述步骤：Referring to Fig. 2, this method comprises the steps:
步骤S110，测量运行中的变压器冷却器的当前设备温度；Step S110, measuring the current equipment temperature of the transformer cooler in operation;
本实施例中，冷却器的当前设备温度包括进油管外壁温度T0、回油管外壁温度Ti和进风口空气温度Ta。本实施例通过在进油管外壁、回油管外壁以及进风口设置温度传感器来实时采集相应位置的温度，并将温度值回传给测量装置。In this embodiment, the current equipment temperature of the cooler includes the temperature T 0 of the outer wall of the oil inlet pipe, the outer wall temperature T i of the oil return pipe, and the air temperature T a of the air inlet. In this embodiment, temperature sensors are installed on the outer wall of the oil inlet pipe, the outer wall of the oil return pipe, and the air inlet to collect the temperature at corresponding positions in real time, and send the temperature value back to the measuring device.
可选的，可以预设采集温度的时间间隔或频率，减少数据回传量的同时，实现了对冷却器设备温度的监测，保证数据准确性和代表性。Optionally, the time interval or frequency of temperature collection can be preset to reduce the amount of data backhaul and at the same time realize the monitoring of the temperature of the cooler equipment to ensure the accuracy and representativeness of the data.
步骤S120，根据所述冷却器的当前设备温度确定所述冷却器的散热功率，并对所述散热功率进行额定修正；Step S120, determining the heat dissipation power of the cooler according to the current equipment temperature of the cooler, and performing a rated correction on the heat dissipation power;
优选的，按照下式计算得到冷却器的散热功率：Preferably, the cooling power of the cooler is calculated according to the following formula:
P＝Q×ρ×C×(T0-Ti)P=Q×ρ×C×(T 0 -T i )
式中，P表示单组冷却器的散热功率；In the formula, P represents the heat dissipation power of a single cooler;
Q表示变压器油的流量；Q represents the flow rate of transformer oil;
ρ表示(T0-Ti)/2温度下的变压器油密度；ρ represents the transformer oil density at (T 0 -T i )/2 temperature;
C表示(T0-Ti)/2温度下的变压器油比热容；C represents the specific heat capacity of transformer oil at (T 0 -T i )/2 temperature;
T0表示进油管外壁温度；T 0 represents the temperature of the outer wall of the oil inlet pipe;
Ti表示回油管外壁温度。T i represents the temperature of the outer wall of the oil return pipe.
另外，在本申请的一些优选实施例中，根据所述冷却器的额定散热功率的测定条件，将所述散热功率修正为所述测定条件下的散热功率。In addition, in some preferred embodiments of the present application, according to the measurement conditions of the rated heat dissipation power of the cooler, the heat dissipation power is corrected to the heat dissipation power under the measurement conditions.
例如，以进油管外壁温度代替进油管油温，根据冷却器的额定散热功率的测定条件，如果所述冷却器的额定散热功率的测定条件不是进油管油温与进风口空气温度的差值为40K，则按照下式将所述散热功率修正为所述测定条件下的散热功率：For example, the temperature of the outer wall of the oil inlet pipe is used to replace the oil temperature of the oil inlet pipe. According to the measurement condition of the rated heat dissipation power of the cooler, if the measurement condition of the rated heat dissipation power of the cooler is not that the difference between the oil temperature of the oil inlet pipe and the air temperature of the air inlet is 40K, the heat dissipation power is corrected to the heat dissipation power under the measurement conditions according to the following formula:
式中，P修正表示额定修正后的散热功率；In the formula, P correction represents the heat dissipation power after rated correction;
Ta表示冷却器的进风口空气温度。T a represents the air inlet air temperature of the cooler.
步骤S130，根据所述额定修正后的散热功率确定所述冷却器的散热效率，并对所述散热效率进行环境修正；Step S130, determining the heat dissipation efficiency of the cooler according to the rated corrected heat dissipation power, and performing environmental correction on the heat dissipation efficiency;
需要说明的是，由于随着海拔升高，空气变稀薄，冷却器的散热效率会有所下降；随着海拔的升高紫外线变强，变压器冷却器吸收太阳辐射的能量变大。因此，为了消除环境因素对冷却器散热效率的影响，以提高量化测定的准确性，本实施例在计算冷却器的散热效率时，引入海拔修正因子和太阳辐射修正因子，从而实现对实测散热效率的环境修正。It should be noted that as the altitude increases, the air becomes thinner, and the heat dissipation efficiency of the cooler will decrease; as the altitude increases, the ultraviolet rays become stronger, and the energy absorbed by the transformer cooler becomes larger. Therefore, in order to eliminate the influence of environmental factors on the heat dissipation efficiency of the cooler and improve the accuracy of the quantitative measurement, this embodiment introduces an altitude correction factor and a solar radiation correction factor when calculating the heat dissipation efficiency of the cooler, so as to realize the actual measurement of heat dissipation efficiency. environmental corrections.
具体的，按照下式确定冷却器的散热效率并进行环境修正：Specifically, the heat dissipation efficiency of the cooler is determined according to the following formula and the environment correction is performed:
其中，η表示环境修正后的散热效率；Among them, η represents the heat dissipation efficiency after environmental correction;
Pn表示冷却器在所述当前设备温度下的额定散热效率；P n represents the rated heat dissipation efficiency of the cooler at the current equipment temperature;
λ表示海拔修正因子，σ表示太阳辐射修正因子。λ represents the altitude correction factor, and σ represents the solar radiation correction factor.
还需说明的是，上述海拔修正因子和太阳辐射修正因子为常数，可通过模拟冷却器在高海拔地区的使用，反复试验得到。It should also be noted that the above-mentioned altitude correction factor and solar radiation correction factor are constants, which can be obtained by simulating the use of coolers in high-altitude areas and repeated tests.
本实施例中，得到的是变压器冷却器散热效率的量化数据，解决了目前冷却器散热效率量化指标模糊不清的问题，对冷却器运维有较强的指导作用。In this embodiment, the quantified data of heat dissipation efficiency of the transformer cooler is obtained, which solves the problem that the quantitative index of heat dissipation efficiency of the cooler is unclear at present, and has a strong guiding effect on the operation and maintenance of the cooler.
步骤S140，根据所述环境修正后的冷却器散热效率与预设的散热效率下限值，输出报警信号。Step S140, outputting an alarm signal according to the heat dissipation efficiency of the cooler after the environment correction and the preset lower limit value of heat dissipation efficiency.
具体的，步骤S140所述的根据环境修正后的冷却器散热效率与预设的散热效率下限值，输出报警信号，包括：Specifically, in step S140, outputting an alarm signal according to the corrected heat dissipation efficiency of the environment and the preset lower limit value of heat dissipation efficiency includes:
判断所述环境修正后的冷却器散热效率η是否小于预设的散热效率下限值τ；Judging whether the heat dissipation efficiency η of the cooler after the environmental correction is less than the preset heat dissipation efficiency lower limit value τ;
比较散热效率η与设定的散热效率下限值τ，当η≧τ时说明冷却器散热效率正常；当η<τ时说明冷却器散热效率存在异常。Compare the heat dissipation efficiency η with the set heat dissipation efficiency lower limit τ. When η≧τ, it indicates that the heat dissipation efficiency of the cooler is normal; when η<τ, it indicates that the heat dissipation efficiency of the cooler is abnormal.
更进一步的，如果输出冷却器散热异常信号，检查冷却器油泵以及冷却扇的工作状态；Furthermore, if the cooler heat dissipation abnormal signal is output, check the working status of the cooler oil pump and cooling fan;
如果所述冷却器油泵及冷却器风扇的工作状态异常，输出油泵或风扇需维护信号；If the working state of the cooler oil pump and the cooler fan is abnormal, output a signal that the oil pump or the fan needs to be maintained;
如果所述冷却器油泵及冷却器风扇的工作状态正常，输出冷却器需冲洗维护信号。If the cooler oil pump and the cooler fan are in normal working condition, a cooler needs to be flushed maintenance signal is output.
本实施例根据变压器冷却器散热效率的量化数据，指导冷却器及相关变压器的维护工作，使维护工作的开展更有针对性，避免了冷却器的欠维护与过维护情况发生。According to the quantified data of the heat dissipation efficiency of the transformer cooler, this embodiment guides the maintenance work of the cooler and related transformers, makes the maintenance work more targeted, and avoids under-maintenance and over-maintenance of the cooler.
本实施例提供一种变压器强油风冷冷却器散热效率量化测定方法，测量运行中的变压器冷却器的当前设备温度，包括进油管、回油管、进风口的当前温度数据；根据所述冷却器的当前设备温度确定所述冷却器的散热功率，并对所述散热功率进行额定修正；根据所述额定修正后的散热功率确定所述冷却器的散热效率，并引入海拔、太阳辐射修正因子，对所述散热效率进行环境修正；通过比较环境修正后的冷却器散热效率与预设的散热效率下限值，输出报警信号；如当散热效率值低于预设的散热效率下限值时，在排除冷却器油泵、风扇问题引起后，可确定为冷却器脏污引起散热效率降低，需对冷却器进行冲洗。本申请方法实现了对单组强油风冷冷却器散热效率的量化测定，考虑了海拔、太阳辐射因素，准确性高，有效避免了以往冷却器维护的盲目性。This embodiment provides a method for quantifying the heat dissipation efficiency of a transformer strong oil air-cooled cooler, measuring the current equipment temperature of the transformer cooler in operation, including the current temperature data of the oil inlet pipe, oil return pipe, and air inlet; according to the cooler Determine the heat dissipation power of the cooler according to the current equipment temperature, and perform rated correction on the heat dissipation power; determine the heat dissipation efficiency of the cooler according to the rated corrected heat dissipation power, and introduce altitude and solar radiation correction factors, Perform environmental correction on the heat dissipation efficiency; output an alarm signal by comparing the heat dissipation efficiency of the cooler after environmental correction with the preset lower limit value of heat dissipation efficiency; for example, when the heat dissipation efficiency value is lower than the preset lower limit value of heat dissipation efficiency, After excluding the problems caused by the oil pump and fan of the cooler, it can be determined that the cooling efficiency is reduced due to the dirty cooler, and the cooler needs to be flushed. The method of this application realizes the quantitative measurement of the heat dissipation efficiency of a single group of strong oil air-cooled coolers, takes into account the factors of altitude and solar radiation, has high accuracy, and effectively avoids the blindness of previous cooler maintenance.
根据上述变压器强油风冷冷却器散热效率量化测定方法，本申请还提供一种变压器强油风冷冷却器散热效率量化测定装置，参阅图3，该装置包括：According to the above method for quantifying the heat dissipation efficiency of the transformer strong oil air-cooled cooler, the application also provides a quantitative measurement device for the heat dissipation efficiency of the transformer strong oil air-cooled cooler, see Figure 3, the device includes:
温度测量单元U110，用于测量运行中的变压器冷却器的当前设备温度；A temperature measurement unit U110 for measuring the current equipment temperature of the transformer cooler in operation;
第一计算单元U120，用于根据所述冷却器的当前设备温度确定所述冷却器的散热功率，并对所述散热功率进行额定修正；The first calculation unit U120 is configured to determine the heat dissipation power of the cooler according to the current equipment temperature of the cooler, and perform a rated correction on the heat dissipation power;
第二计算单元U130，用于根据所述额定修正后的散热功率确定所述冷却器的散热效率，并对所述散热效率进行环境修正；The second calculation unit U130 is configured to determine the heat dissipation efficiency of the cooler according to the rated corrected heat dissipation power, and perform environmental correction on the heat dissipation efficiency;
报警单元U140，用于根据所述环境修正后的冷却器散热效率与预设的散热效率下限值，输出报警信号。The alarm unit U140 is configured to output an alarm signal according to the corrected cooling efficiency of the cooler in the environment and the preset lower limit value of the cooling efficiency.
优选的，所述冷却器的当前设备温度包括进油管外壁温度、回油管外壁温度和进风口空气温度；所述第一计算单元U120按照下式计算得到冷却器的散热功率：Preferably, the current equipment temperature of the cooler includes the outer wall temperature of the oil inlet pipe, the outer wall temperature of the oil return pipe, and the air temperature of the air inlet; the first calculation unit U120 calculates the cooling power of the cooler according to the following formula:
P＝Q×ρ×C×(T0-Ti)P=Q×ρ×C×(T 0 -T i )
式中，P表示单组冷却器的散热功率；In the formula, P represents the heat dissipation power of a single cooler;
Q表示变压器油的流量；Q represents the flow rate of transformer oil;
ρ表示(T0-Ti)/2温度下的变压器油密度；ρ represents the transformer oil density at (T 0 -T i )/2 temperature;
C表示(T0-Ti)/2温度下的变压器油比热容；C represents the specific heat capacity of transformer oil at (T 0 -T i )/2 temperature;
T0表示进油管外壁温度；T 0 represents the temperature of the outer wall of the oil inlet pipe;
Ti表示回油管外壁温度。T i represents the temperature of the outer wall of the oil return pipe.
优选的，所述第一计算单元U120，以进油管外壁温度T0代替进油管油温，根据所述冷却器的额定散热功率的测定条件，按照下式将所述散热功率修正为所述测定条件下的散热功率：Preferably, the first calculation unit U120 replaces the oil temperature of the oil inlet pipe with the temperature T0 of the outer wall of the oil inlet pipe, and according to the measurement conditions of the rated heat dissipation power of the cooler, corrects the heat dissipation power to the measured Thermal power under conditions:
式中，P修正表示额定修正后的散热功率；In the formula, P correction represents the heat dissipation power after rated correction;
Ta表示冷却器的进风口空气温度。T a represents the air inlet air temperature of the cooler.
优选的，所述第二计算单元U130按照下式确定冷却器的散热效率并进行环境修正：Preferably, the second calculation unit U130 determines the heat dissipation efficiency of the cooler according to the following formula and performs environmental correction:
其中，η表示环境修正后的散热效率；Among them, η represents the heat dissipation efficiency after environmental correction;
Pn表示冷却器在所述当前设备温度下的额定散热效率；P n represents the rated heat dissipation efficiency of the cooler at the current equipment temperature;
λ表示海拔修正因子，σ表示太阳辐射修正因子。λ represents the altitude correction factor, and σ represents the solar radiation correction factor.
优选的，所述报警单元U140具体用于：Preferably, the alarm unit U140 is specifically used for:
判断所述环境修正后的冷却器散热效率η是否小于预设的散热效率下限值τ；Judging whether the heat dissipation efficiency η of the cooler after the environmental correction is less than the preset heat dissipation efficiency lower limit value τ;
如果所述环境修正后的冷却器散热效率η小于预设的散热效率下限值τ，输出冷却器散热异常预警信号；If the heat dissipation efficiency η of the cooler after the environmental correction is less than the preset heat dissipation efficiency lower limit τ, an abnormal warning signal for heat dissipation of the cooler is output;
如果所述环境修正后的冷却器散热效率η大于或等于预设的散热效率下限值τ，输出冷却器散热正常信号。If the heat dissipation efficiency η of the cooler after environmental correction is greater than or equal to the preset lower limit value τ of heat dissipation efficiency, a normal signal of heat dissipation of the cooler is output.
优选的，所述报警单元U140还用于：Preferably, the alarm unit U140 is also used for:
如果输出冷却器散热异常信号，检查冷却器油泵以及冷却扇的工作状态；If the cooler heat dissipation abnormal signal is output, check the working status of the cooler oil pump and cooling fan;
如果所述冷却器油泵及冷却器风扇的工作状态异常，输出油泵或风扇需维护信号；If the working state of the cooler oil pump and the cooler fan is abnormal, output a signal that the oil pump or the fan needs to be maintained;
如果所述冷却器油泵及冷却器风扇的工作状态正常，输出冷却器需冲洗维护信号。If the cooler oil pump and the cooler fan are in normal working condition, a cooler needs to be flushed maintenance signal is output.
本申请提供一种变压器强油风冷冷却器散热效率量化测定方法及装置，其中，所述方法测量运行中的变压器冷却器的当前设备温度，包括进油管、回油管、进风口的当前温度数据；根据所述冷却器的当前设备温度确定所述冷却器的散热功率，并对所述散热功率进行额定修正；根据所述额定修正后的散热功率确定所述冷却器的散热效率，并引入海拔、太阳辐射修正因子，对所述散热效率进行环境修正；通过比较环境修正后的冷却器散热效率与预设的散热效率下限值，输出报警信号；如当散热效率值低于预设的散热效率下限值时，在排除冷却器油泵、风扇问题引起后，可确定为冷却器脏污引起散热效率降低，需对冷却器翅片进行冲洗。本申请方法实现了对单组强油风冷冷却器散热效率的量化测定，考虑了海拔、太阳辐射因素，准确性高，有效避免了以往冷却器维护的盲目性。The present application provides a quantitative measurement method and device for the heat dissipation efficiency of a transformer strong oil air-cooled cooler, wherein the method measures the current equipment temperature of the transformer cooler in operation, including the current temperature data of the oil inlet pipe, oil return pipe, and air inlet ; Determine the heat dissipation power of the cooler according to the current equipment temperature of the cooler, and perform a rated correction on the heat dissipation power; determine the heat dissipation efficiency of the cooler according to the rated corrected heat dissipation power, and introduce the altitude , solar radiation correction factor, and carry out environmental correction to the heat dissipation efficiency; by comparing the heat dissipation efficiency of the cooler after environmental correction with the preset lower limit value of heat dissipation efficiency, an alarm signal is output; if the heat dissipation efficiency value is lower than the preset heat dissipation When the lower limit of efficiency is reached, after excluding the problems caused by the oil pump and fan of the cooler, it can be determined that the heat dissipation efficiency is reduced due to the dirty cooler, and the fins of the cooler need to be flushed. The method of this application realizes the quantitative measurement of the heat dissipation efficiency of a single group of strong oil air-cooled coolers, takes into account the factors of altitude and solar radiation, has high accuracy, and effectively avoids the blindness of previous cooler maintenance.
本领域的技术人员可以清楚地了解到本发明实施例中的技术可借助软件加必需的通用硬件平台的方式来实现。基于这样的理解，本发明实施例中的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品可以存储在存储介质中，如ROM/RAM、磁碟、光盘等，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本发明各个实施例或者实施例的某些部分所述的方法。Those skilled in the art can clearly understand that the technologies in the embodiments of the present invention can be implemented by means of software plus a necessary general-purpose hardware platform. Based on this understanding, the essence of the technical solutions in the embodiments of the present invention or the part that contributes to the prior art can be embodied in the form of software products, and the computer software products can be stored in storage media, such as ROM/RAM , magnetic disk, optical disk, etc., including several instructions to enable a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in various embodiments or some parts of the embodiments of the present invention.
本说明书中各个实施例之间相同相似的部分互相参见即可。尤其，对于装置实施例而言，由于其基本相似于方法实施例，所以描述的比较简单，相关之处参见方法实施例中的说明即可。For the same and similar parts among the various embodiments in this specification, refer to each other. In particular, as for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and for relevant parts, refer to the description in the method embodiment.
以上所述的本发明实施方式并不构成对本发明保护范围的限定。The embodiments of the present invention described above are not intended to limit the protection scope of the present invention.
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| CN111487077B (en) * | 2020-04-28 | 2021-11-02 | 广东电网有限责任公司 | Cooling verification method and verification device for power transformer cooling equipment |
| CN111708317A (en) * | 2020-06-18 | 2020-09-25 | 西安西变组件有限公司 | Transformer control method, device and system, storage medium and electronic equipment |
| CN111895327A (en) * | 2020-08-04 | 2020-11-06 | 广东众科智能科技股份有限公司 | 5G intelligent lamp comprehensive rod |
| CN113946170A (en) * | 2021-10-14 | 2022-01-18 | 云南电网有限责任公司电力科学研究院 | Self-adaptive control method and system of transformer cooling device |
| CN114459765A (en) * | 2022-01-24 | 2022-05-10 | 东风汽车股份有限公司 | Method for monitoring cooling efficiency of radiator |
| CN114459765B (en) * | 2022-01-24 | 2023-09-29 | 东风汽车股份有限公司 | Radiator cooling efficiency monitoring method |
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