WO2021063208A1 - Method for determining abnormal measurement of ultra-high voltage direct current rectifier side voltage - Google Patents

Method for determining abnormal measurement of ultra-high voltage direct current rectifier side voltage Download PDF

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WO2021063208A1
WO2021063208A1 PCT/CN2020/116680 CN2020116680W WO2021063208A1 WO 2021063208 A1 WO2021063208 A1 WO 2021063208A1 CN 2020116680 W CN2020116680 W CN 2020116680W WO 2021063208 A1 WO2021063208 A1 WO 2021063208A1
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low
gear position
voltage
udm
measurement
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武霁阳
彭光强
何竞松
李清
王越杨
李章允
国建宝
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中国南方电网有限责任公司超高压输电公司检修试验中心
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
    • G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead

Abstract

A method for determining an abnormal measurement of an ultra-high voltage direct current rectifier side voltage, comprising: detecting a high end valve set firing angle α* high end and a low end valve set firing angle α* low end of a rectifier station, and a high-end valve set firing angle α* high end op and a low-end valve set firing angle α* low end op of an opposite pole; detecting a high voltage bus voltage UdH, a high/low valve set midpoint voltage UdM and a low voltage bus voltage UdN of the rectifier station, and a high voltage bus voltage UdHop, a high/low valve set midpoint voltage UdMop and a low voltage bus voltage UdNop of the opposite pole; correcting α* high end, α* low end, α* high end op, and α* low end op to a standard commutation and gear shifting position, so as to obtain corrected firing angles αhigh end, αlow end, αhigh end op, and αlow end op; and according to the relationship between αhigh end and αlow end, and in conjunction with αhigh end op, αlow end op, UdH, UdM, UdN, UdHop, UdMop and UdNop, determining an abnormal measurement point. The method for determining an abnormal measurement of an ultra-high voltage direct current rectifier side voltage has a simple principle, and does not rely on a rectifier station and an inverter station for data communication, having relatively high engineering practical value.

Description

一种特高压直流整流侧电压测量异常判断方法Method for judging abnormal voltage measurement on UHV DC rectifier side 技术领域Technical field
本发明涉及直流输电电压测量异常检测，具体涉及一种特高压直流整流侧电压测量异常判断方法。The invention relates to detection of abnormality in DC transmission voltage measurement, and in particular to a method for judging abnormality in measurement of UHV DC rectifier side voltage.
背景技术Background technique
直流输电测量设备是保证直流安全稳定运行的核心设备，直流控制保护程序也是在电气量测量结果的基础上工作。若直流测量设备的测量结果存在异常，必然导致直流运行状态发生变化，严重的可能引起保护跳闸和甚至一次设备如晶闸管损坏，造成巨大的经济和社会影响。The DC transmission measurement equipment is the core equipment to ensure the safe and stable operation of the DC, and the DC control protection program also works on the basis of the electrical quantity measurement results. If the measurement result of the DC measurement equipment is abnormal, it will inevitably lead to changes in the DC operating state, which may seriously cause protection tripping and even damage to primary equipment such as thyristors, which will cause huge economic and social impacts.
从测量原理上看，直流电压和直流电流均存在发生测量异常的可能，但直流电压一般采用分压原理进行测量，直流电流一般采用分流原理进行测量，直流电压的测量原理相较于直流电流更容易受到测量回路中电气元件参数变化的影响，实际工程中也多次发生由于电阻盒内的压敏电阻异常导致电压测量异常发生。从测量异常发生的后果上看，直流电流发生测量异常会引起电流控制器的触发角输出发生变化，导致直流进入过负荷运行状态。而直流电压发生测量异常时，一方面可能引起直流系统出现过电压，给设备运行造成风险，另一方面，也可能引起整流侧触发角或逆变侧熄弧角降低，产生晶闸管不同步触发或换相失败的风险。因此直流电压发生测量异常会造成更为严重的后果。From the measurement principle, both DC voltage and DC current may have measurement abnormalities, but DC voltage is generally measured by the principle of voltage division, and DC current is generally measured by the principle of shunting. The measurement principle of DC voltage is more than that of DC current. It is susceptible to the influence of changes in the parameters of the electrical components in the measurement loop. In actual engineering, it has also occurred many times that the voltage measurement is abnormal due to the abnormal varistor in the resistance box. From the perspective of the consequences of the abnormal measurement, the abnormal measurement of the DC current will cause the trigger angle output of the current controller to change, causing the DC to enter the overload operation state. When the DC voltage is measured abnormally, on the one hand, it may cause overvoltage in the DC system, which may cause risks to the operation of the equipment. On the other hand, it may also cause the trigger angle of the rectifier side or the arc extinguishing angle of the inverter side to decrease, resulting in asynchronous triggering of the thyristor or The risk of commutation failure. Therefore, an abnormal measurement of the DC voltage will cause more serious consequences.
目前，现场并没有直流电压测量异常的判断方法或保护设备，当直流运行状态发生异常时，主要通过现场运维人员通过经验或电磁暂态仿真复现故障判断异常现象是否由直流测量异常引起，导致了明显缺乏有效的理论支撑，且无法及时为现场运维提供技术支持。此外，不同测点的测量偏高或测量偏低，可能有相近似的异常现象，如UdH测量偏高和UdM测量偏低，增加了确定异常测点的难度。因此目前直流电压测量异常的判断方法的缺失问题十分突出。At present, there is no judgment method or protection equipment for DC voltage measurement abnormality at the site. When the DC operation status is abnormal, the field operation and maintenance personnel mainly use experience or electromagnetic transient simulation to reproduce the fault to determine whether the abnormal phenomenon is caused by the DC measurement abnormality. As a result, there is a clear lack of effective theoretical support and inability to provide technical support for on-site operation and maintenance in a timely manner. In addition, the high or low measurement of different measuring points may have similar abnormal phenomena, such as high UdH measurement and low UdM measurement, which increases the difficulty of determining abnormal measuring points. Therefore, the current lack of judging methods for abnormal DC voltage measurement is very prominent.
现场运维工作的局限也增加了测量异常判断的难度，整流站运维人员主要关注整流站运行电气量变化情况，而逆变站运维人员主要关注逆变站运行电气量变化情况，主要希望明确是否本站发生测量异常。The limitations of on-site operation and maintenance work also increase the difficulty of measuring abnormalities. The operation and maintenance personnel of the rectifier station mainly pay attention to the changes in the electrical quantity of the rectifier station, while the operation and maintenance personnel of the inverter station mainly pay attention to the changes of the electrical quantity of the inverter station. Determine whether there is a measurement abnormality on this site.
综上，以特高压直流输电整流侧电压测量异常为研究对象，发明适用于整流侧的电压测量异常的方法成为现有电压测量异常是目前的研究方向之一。In summary, taking the abnormal voltage measurement on the rectifier side of UHV DC transmission as the research object, inventing a method suitable for abnormal voltage measurement on the rectifier side has become one of the current research directions for abnormal voltage measurement.
发明内容Summary of the invention
为了提高特高压直流输电工程现场运维人员对于电压测量异常的识别能力，本发明提出一种特高压直流整流侧电压测量异常判断方法，通过对比整流侧高低端阀组间的触发角差异和不同极之间的触发角和阀组电压差异，实现整流侧测量异常的识别和异常测点的定位。In order to improve the ability of UHV DC transmission project operation and maintenance personnel to identify abnormal voltage measurement, the present invention proposes a method for judging abnormal voltage measurement on the UHV DC rectifier side, which compares the difference in the firing angle between the high and low end valve groups on the rectifier side and The difference in trigger angle and valve group voltage between different poles realizes the identification of measurement abnormalities on the rectifier side and the positioning of abnormal measurement points.
为实现上述目的，本发明的技术方案是：In order to achieve the above objective, the technical solution of the present invention is:
一种特高压直流整流侧电压测量异常判断方法，包括以下步骤：A method for judging abnormalities in UHV DC rectifier side voltage measurement, including the following steps:
步骤1、检测整流站高端阀组触发角α * 高端和低端阀组触发角α * 低端，以及对极高端阀组触发角α * 高端op和低端阀组触发角α * 低端op； Step 1, detecting the rectifier firing angle α * high-valve upper and lower ends valve firing angle α * low end and high end of the pole angle α * trigger valve op high and low low-side valve firing angle α * op ；
步骤2、检测整流站高压母线电压UdH、高低阀组中点电压UdM、低压母线电压UdN，以及对极的高压母线电压UdH op、高低阀组中点电压UdM op、低压母线电压UdN op； Step 2. Detect the high-voltage bus voltage UdH of the rectifier station, the midpoint voltage UdM of the high and low valve group, the low voltage bus voltage UdN, and the opposite high voltage bus voltage UdH op , the midpoint voltage of the high and low valve group UdM op , and the low voltage bus voltage UdN op ;
步骤3、将α * 高端，α * 低端，α * 高端op，α * 低端op修正至标准换流变档位下，得到修正后的触发角α 高端，α 低端，α 高端op，α 低端op； Step 3. Correct α * high end , α * low end , α * high end op , α * low end op to the standard shifting gear position to obtain the corrected firing angle α high end , α low end , and α high end op . α low-end op ;
步骤4、判断是否满足α 高端>α 低端+1.5°； Step 4. Determine whether α high end > α low end + 1.5° is satisfied;
A.若满足则进入步骤6；A. If satisfied, go to step 6;
B.若不满足则进入步骤5；B. If not satisfied, go to step 5;
步骤5、判断是否满足α 低端>α 高端+1.5°； Step 5. Determine whether α low end > α high end + 1.5° is satisfied;
A.若满足则进入步骤7；A. If satisfied, go to step 7;
B.若不满足则进入步骤10；B. If not satisfied, go to step 10;
步骤6、初步判断得知整流侧UdH测量偏高或者整流侧UdM测量偏低，进入步骤8；Step 6. Preliminary judgment is that the UdH measurement on the rectifier side is too high or the UdM measurement on the rectifier side is too low, go to step 8;
步骤7、初步判断得知整流侧UdH测量偏低或者整流侧UdM测量偏高，进入步骤8；Step 7. Preliminary judgement is that the UdH measurement on the rectifier side is low or the UdM measurement on the rectifier side is too high, go to step 8;
步骤8、判断关系1和关系2： Step 8. Determine relationship 1 and relationship 2:
关系1 α 高端>α 高端op+1.5°且|UdH-UdM|<|UdH op-UdM op|，或者α 高端<α 高端op+1.5°且|UdH-UdM|>|UdH op-UdM op|； Relationship 1 α high-end >α high-end op +1.5°and |UdH-UdM|<|UdH op -UdM op |, or α high-end <α high-end op +1.5° and |UdH-UdM|>|UdH op -UdM op | ；
关系2 α 低端>α 低端op+1.5°且|UdM-UdN|<|UdM op-UdN op|，或者α 低端<α 低端op+1.5°且|UdM-UdN|>|UdM op-UdN op|； Relationship 2 α low end >α low end op +1.5°and |UdM-UdN|<|UdM op -UdN op |, or α low end < αlow end op +1.5°and |UdM-UdN|>|UdM op -UdN op |;
判断完成后进入步骤9；After the judgment is completed, go to step 9;
步骤9、判断关系1和关系2的满足情况：Step 9. Determine the satisfaction of relationship 1 and relationship 2:
A.关系1和关系2均满足，则进入步骤12；A. If both relationship 1 and relationship 2 are satisfied, then go to step 12;
B.关系1和关系2存在不满足的情况，则进入步骤11；B. If relationship 1 and relationship 2 are not satisfied, go to step 11;
步骤10、无测量异常，测量异常判断流程结束；Step 10. There is no measurement abnormality, and the measurement abnormality judgment process ends;
步骤11、整流侧UdH测量存在异常，测量异常判断流程结束；Step 11. The UdH measurement on the rectifier side is abnormal, and the measurement abnormality judgment process ends;
步骤12、整流侧UdM测量存在异常，测量异常判断流程结束。 Step 12. The UdM measurement on the rectifier side is abnormal, and the measurement abnormality judgment process ends.
进一步地，步骤3中，标准换流变档位为整流侧所有档位平均值的四舍五入，且只保留整数。Further, in step 3, the standard commutation gear position is rounded off the average value of all gear positions on the rectifier side, and only integers are retained.
进一步地，步骤3中：α 高端的计算方法如下： Further, in step 3: the calculation method of α high end is as follows:
若高端阀组实际档位大于标准换流变档位k档，则α 高端＝α * 高端+2°*k； If the actual gear position of the high-end valve group is greater than the standard shift variable gear position k, α high-end = α * high-end + 2°*k;
若高端阀组实际档位小于标准换流变档位k档，则α 高端＝α * 高端-2°*k； If the actual gear position of the high-end valve group is smaller than the standard shift variable gear position k, α high-end = α * high-end -2°*k;
若高端阀组实际档位等于标准换流变档位k档，则α 高端＝α * 高端。 If the actual gear position of the high-end valve group is equal to the standard shift variable gear position k, then α high-end = α * high-end .
进一步地，α 低端的计算方法如下： Further, the calculation method for the low end of α is as follows:
若低端阀组实际档位大于标准换流变档位k档，则α 低端＝α * 低端+2°*k； If the actual gear position of the low-end valve group is greater than the standard shift variable gear position k, then α low end = α * low end + 2°*k;
若低端阀组实际档位小于标准换流变档位k档，则α 低端＝α * 低端-2°*k； If the actual gear position of the low-end valve group is smaller than the standard shift variable gear position k, then α low end = α * low end -2°*k;
若低端阀组实际档位等于标准换流变档位k档，则α 低端＝α * 低端。 If the actual gear position of the low-end valve group is equal to the standard shift variable gear position k, then α low end = α * low end .
进一步地，α * 高端op的计算方法如下： Further, the calculation method of α * high-end op is as follows:
若对极高端阀组实际档位大于标准换流变档位k档，则α 高端op＝α * 高端op+2°*k； If the actual gear position of the extremely high-end valve group is greater than the standard shift variable gear position k, α high-end op =α * high-end op +2°*k;
若对极高端阀组实际档位小于标准换流变档位k档，则α 高端op＝α * 高端op-2°*k； If the actual gear position of the extremely high-end valve group is smaller than the standard shift variable gear position k, α high-end op =α * high-end op -2°*k;
若对极高端阀组实际档位等于标准换流变档位k档，则α 高端op＝α * 高端op。 If the actual gear position of the extremely high-end valve group is equal to the standard shift variable gear position k, then α high-end op =α * high-end op .
进一步地，步骤3中：α * 低端op的计算方法如下： Further, in step 3: the calculation method of α * low-end op is as follows:
若对极低端阀组实际档位大于标准换流变档位k档，则α 低端op＝α * 低端op+2°*k； If the actual gear position of the very low-end valve group is greater than the standard shift variable gear position k, then α low-end op =α * low-end op +2°*k;
若对极低端阀组实际档位小于标准换流变档位k档，则α 低端op＝α * 低端op-2°*k； If the actual gear position of the very low-end valve group is smaller than the standard shift variable gear position k, then α low-end op =α * low-end op -2°*k;
若对极低端阀组实际档位等于标准换流变档位k档，则α 低端op＝α * 低端op。 If the actual gear position of the very low-end valve group is equal to the standard shift variable gear position k, then α low-end op = α * low-end op .
本发明的有益效果是：通过对比整流侧高低端阀组间的触发角差异和不同极之间的触发角和阀组电压差异，本方法可实现整流侧测量异常的识别和异常测点的定位。本方法原理简单，便于实现，且仅使用整流侧数据，不依赖于整流站和逆变站进行数据通讯，具有较强的工程实用价值。The beneficial effect of the present invention is that by comparing the trigger angle difference between the high and low end valve groups on the rectifier side and the trigger angle and valve group voltage differences between different poles, the method can realize the recognition of measurement abnormalities on the rectifier side and the detection of abnormal measurement points. Positioning. The method is simple in principle, easy to implement, and only uses the rectifier side data, does not rely on the rectifier station and the inverter station for data communication, and has strong engineering practical value.
附图说明Description of the drawings
图1是换流站整流侧极1的直流电压测点示意图；Figure 1 is a schematic diagram of DC voltage measurement points on the rectifier side pole 1 of a converter station;
图2是本发明特高压直流整流侧电压测量异常判断方法的流程图；Fig. 2 is a flowchart of the method for judging abnormal voltage measurement on the UHV DC rectifier side of the present invention;
图3是普侨直流整流侧极1UdH偏高1.02倍时，整流站直流场状态截图；Figure 3 is a screenshot of the DC field status of the rectifier station when the 1UdH of the DC rectifier side pole of Puqiao is higher than 1.02 times;
图4是普侨直流整流侧极1UdH偏高1.02倍时，整流站换流变运行状态截图。Figure 4 is a screenshot of the operation status of the converter transformer of the rectifier station when the 1UdH of the DC rectifier side pole of Puqiao is higher than 1.02 times.
具体实施方式Detailed ways
为使本发明的上述目的、特征和优点能够更加明显易懂，下面结合附图和具体实施方式对本发明作进一步详细的说明。In order to make the above objectives, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
图1是换流站整流侧极1的直流电压测点示意图，本发明采用的原理为：Fig. 1 is a schematic diagram of the DC voltage measurement points of the rectifier side pole 1 of a converter station. The principle adopted in the present invention is:
当整流侧电压发生测量异常时，整流侧控制系统检测到高低阀组间阀组电压存在差异，虽然整流侧一般处于定电流控制，但会启动电压平衡控制通过调节高低阀组的电流控制器误差值输出，以达到高低端阀组电压相等的目的。在此种运行状态下，必然会导致高低端阀组间触发角存在差异。When the rectifier side voltage is measured abnormally, the rectifier side control system detects the difference in the valve group voltage between the high and low valve groups. Although the rectifier side is generally under constant current control, it will start the voltage balance control by adjusting the current controller error of the high and low valve groups. Value output, in order to achieve the purpose of equalizing the voltage of the high and low end valve groups. In this operating state, there will inevitably be a difference in the firing angle between the high and low end valve groups.
并且根据阀组电压计算公式：And according to the calculation formula of the valve group voltage:
Figure PCTCN2020116680-appb-000001
Figure PCTCN2020116680-appb-000001
其中，U d1为阀电压；E为电源电压有效值；α为阀触发角；μ为换相角。当阀电压增加，在换相角不变的情况下，触发角必然下降。同理当阀电压下降，在换相角不变的情况下，触发角必然增加。因此，当发现高低阀组电压一样，但触发角不一样时，表明直流系统处于不正常的运行方式下。而通过与对极的阀组电压和阀组触发角对比就可以确定是UdH还是UdM存在测量异常。 Among them, U d1 is the valve voltage; E is the effective value of the power supply voltage; α is the valve trigger angle; μ is the commutation angle. When the valve voltage increases and the commutation angle remains the same, the firing angle will inevitably decrease. Similarly, when the valve voltage drops, the firing angle will inevitably increase when the commutation angle remains unchanged. Therefore, when it is found that the high and low valve group voltages are the same but the firing angles are different, it indicates that the DC system is in an abnormal operation mode. And by comparing with the opposite pole valve group voltage and valve group trigger angle, it can be determined whether UdH or UdM has a measurement abnormality.
鉴于此，请参照图2所示，本发明提供一种特高压直流整流侧电压测量异常判断方法，包括以下步骤：In view of this, please refer to FIG. 2. The present invention provides a method for judging abnormalities in UHV DC rectifier side voltage measurement, which includes the following steps:
步骤1、检测整流站高端阀组触发角α * 高端和低端阀组触发角α * 低端，以及对极高端阀组触发角α * 高端op和低端阀组触发角α * 低端op； Step 1, detecting the rectifier firing angle α * high-valve upper and lower ends valve firing angle α * low end and high end of the pole angle α * trigger valve op high and low low-side valve firing angle α * op ；
步骤2、检测整流站高压母线电压UdH、高低阀组中点电压UdM、低压母线电压UdN，以及对极的高压母线电压UdH op、高低阀组中点电压UdM op、低压母线电压UdN op； Step 2. Detect the high-voltage bus voltage UdH of the rectifier station, the midpoint voltage UdM of the high and low valve group, the low voltage bus voltage UdN, and the opposite high voltage bus voltage UdH op , the midpoint voltage of the high and low valve group UdM op , and the low voltage bus voltage UdN op ;
步骤3、将α * 高端，α * 低端，α * 高端op，α * 低端op修正至标准换流变档位下，得到修正后的触发角α 高端，α 低端，α 高端op，α 低端op； Step 3. Correct α * high end , α * low end , α * high end op , α * low end op to the standard shifting gear position to obtain the corrected firing angle α high end , α low end , and α high end op . α low-end op ;
其中，标准换流变档位为整流侧所有档位平均值的四舍五入，且只保留整数；Among them, the standard shift gears are rounded off the average of all gears on the rectifier side, and only integers are reserved;
其中，α 高端的计算方法如下： Among them, the calculation method of α high-end is as follows:
若高端阀组实际档位大于标准换流变档位k档，则α 高端＝α * 高端+2°*k； If the actual gear position of the high-end valve group is greater than the standard shift variable gear position k, α high-end = α * high-end + 2°*k;
若高端阀组实际档位小于标准换流变档位k档，则α 高端＝α * 高端-2°*k； If the actual gear position of the high-end valve group is smaller than the standard shift variable gear position k, α high-end = α * high-end -2°*k;
若高端阀组实际档位等于标准换流变档位k档，则α 高端＝α * 高端； If the actual gear position of the high-end valve group is equal to the standard shift variable gear position k, then α high-end = α * high-end ;
其中，α 低端的计算方法如下： Among them, the calculation method for the low end of α is as follows:
若低端阀组实际档位大于标准换流变档位k档，则α 低端＝α * 低端+2°*k； If the actual gear position of the low-end valve group is greater than the standard shift variable gear position k, then α low end = α * low end + 2°*k;
若低端阀组实际档位小于标准换流变档位k档，则α 低端＝α * 低端-2°*k； If the actual gear position of the low-end valve group is smaller than the standard shift variable gear position k, then α low end = α * low end -2°*k;
若低端阀组实际档位等于标准换流变档位k档，则α 低端＝α * 低端； If the actual gear position of the low-end valve group is equal to the standard shift variable gear position k, then α low end = α * low end ;
其中，α * 高端op的计算方法如下： Among them, the calculation method of α * high-end op is as follows:
若对极高端阀组实际档位大于标准换流变档位k档，则α 高端op＝α * 高端op+2°*k； If the actual gear position of the extremely high-end valve group is greater than the standard shift variable gear position k, α high-end op =α * high-end op +2°*k;
若对极高端阀组实际档位小于标准换流变档位k档，则α 高端op＝α * 高端op-2°*k； If the actual gear position of the extremely high-end valve group is smaller than the standard shift variable gear position k, α high-end op =α * high-end op -2°*k;
若对极高端阀组实际档位等于标准换流变档位k档，则α 高端op＝α * 高端op； If the actual gear position of the extremely high-end valve group is equal to the standard shift variable gear position k, then α high-end op =α * high-end op ;
其中，α * 低端op的计算方法如下： Among them, the calculation method of α * low-end op is as follows:
若对极低端阀组实际档位大于标准换流变档位k档，则α 低端op＝α * 低端op+2°*k； If the actual gear position of the very low-end valve group is greater than the standard shift variable gear position k, then α low-end op =α * low-end op +2°*k;
若对极低端阀组实际档位小于标准换流变档位k档，则α 低端op＝α * 低端op-2°*k； If the actual gear position of the very low-end valve group is smaller than the standard shift variable gear position k, then α low-end op =α * low-end op -2°*k;
若对极低端阀组实际档位等于标准换流变档位k档，则α 低端op＝α * 低端op； If the actual gear position of the very low-end valve group is equal to the standard shift variable gear position k, then α low-end op = α * low-end op ;
步骤4、判断是否满足α 高端>α 低端+1.5°； Step 4. Determine whether α high end > α low end + 1.5° is satisfied;
A.若满足则进入步骤6；A. If satisfied, go to step 6;
B.若不满足则进入步骤5；B. If not satisfied, go to step 5;
步骤5、判断是否满足α 低端>α 高端+1.5°； Step 5. Determine whether α low end > α high end + 1.5° is satisfied;
A.若满足则进入步骤7；A. If satisfied, go to step 7;
B.若不满足则进入步骤10；B. If not satisfied, go to step 10;
步骤6、初步判断得知整流侧UdH测量偏高或者整流侧UdM测量偏低，进入步骤8；Step 6. Preliminary judgment is that the UdH measurement on the rectifier side is too high or the UdM measurement on the rectifier side is too low, go to step 8;
步骤7、初步判断得知整流侧UdH测量偏低或者整流侧UdM测量偏高，进入步骤8；Step 7. Preliminary judgement is that the UdH measurement on the rectifier side is low or the UdM measurement on the rectifier side is too high, go to step 8;
步骤8、判断关系1和关系2： Step 8. Determine relationship 1 and relationship 2:
关系1α 高端>α 高端op+1.5°且|UdH-UdM|<|UdH op-UdM op|，或者α 高端<α 高端op+1.5°且|UdH-UdM|>|UdH op-UdM op|。 Relationship 1α high-end >α high-end op +1.5° and |UdH-UdM|<|UdH op -UdM op |, or α high-end <α high-end op +1.5° and |UdH-UdM|>|UdH op -UdM op |.
关系2α 低端>α 低端op+1.5°且|UdM-UdN|<|UdM op-UdN op|，或者α 低端<α 低端op+1.5°且|UdM-UdN|>|UdM op-UdN op|。 Low-end relation 2α> α and the lower end op + 1.5 ° | UdM-UdN | <| UdM op -UdN op |, or the low end of [alpha] <α op + 1.5 ° and the low-end | UdM-UdN |> | UdM op - UdN op |.
判断完成后进入步骤9；After the judgment is completed, go to step 9;
步骤9、判断关系1和关系2的满足情况：Step 9. Determine the satisfaction of relationship 1 and relationship 2:
A.关系1和关系2均满足，则进入步骤12；A. If both relationship 1 and relationship 2 are satisfied, then go to step 12;
B.关系1和关系2存在不满足的情况，则进入步骤11；B. If relationship 1 and relationship 2 are not satisfied, go to step 11;
步骤10、无测量异常，测量异常判断流程结束；Step 10. There is no measurement abnormality, and the measurement abnormality judgment process ends;
步骤11、整流侧UdH测量存在异常，测量异常判断流程结束；Step 11. The UdH measurement on the rectifier side is abnormal, and the measurement abnormality judgment process ends;
步骤12、整流侧UdM测量存在异常，测量异常判断流程结束。 Step 12. The UdM measurement on the rectifier side is abnormal, and the measurement abnormality judgment process ends.
为了验证本发明方法的准确性，基于普侨直流RTDS电磁暂态仿真平台对所提出方法进行验证，该平台配备与实际工程一致的站控、极控、组控、极保护、阀组保护装置，并且控制保护程序与实际工程一致。In order to verify the accuracy of the method of the present invention, the proposed method is verified based on the Puqiao DC RTDS electromagnetic transient simulation platform, which is equipped with station control, pole control, group control, pole protection, and valve group protection devices consistent with the actual project. , And the control protection program is consistent with the actual project.
在普侨直流仿真模型中设置整流侧UdH测量输出偏大1.02倍，系统整流站运行状态截图如图3和4所示。根据所提出方法：In the Puqiao DC simulation model, the UdH measurement output on the rectifier side is set to be 1.02 times larger. The screenshots of the operating status of the system rectifier station are shown in Figures 3 and 4. According to the proposed method:
步骤1、如图3所示，整流站极1高端阀组触发角α * 高端＝18°和低端阀组触发角α * 低端＝12°；极2高端阀组触发角α * 高端op＝16°和低端阀组触发角α * 低端op＝16°，进入步骤2； Step 1. As shown in Figure 3, the rectifier station pole 1 high-end valve group firing angle α * high-end = 18° and low-end valve group firing angle α * low-end = 12°; pole 2 high-end valve group firing angle α * high-end op ＝16° and low-end valve group trigger angle α * low-end op ＝16°, go to step 2;
步骤2、如图3所示，整流站极1高压母线电压UdH＝815kV、高低阀组中点电压UdM＝408kV、低压母线电压UdN＝0kV；极2高压母线电压UdH op＝-799kV、高低阀组中点电压UdM op＝-400kV、低压母线电压UdN op＝0kV，进入步骤3； Step 2. As shown in Figure 3, rectifier station pole 1 high voltage bus voltage UdH = 815kV, high and low valve group midpoint voltage UdM = 408kV, low voltage bus voltage UdN = 0kV; pole 2 high voltage bus voltage UdH op = -799kV, high and low valve Group midpoint voltage UdM op = -400kV, low-voltage bus voltage UdN op = 0kV, go to step 3;
步骤3、如图4所示，整流侧极1高端阀组换流变为9档，极1低端阀组及极2的阀组换流变均为8档，计算得到标准换流变档位为8档，修正后的触发角为：α 高端＝18°+2°*1＝20°；α 低端＝12°；α 高端op＝16°；α 低端op＝16°；进入步骤4； Step 3. As shown in Figure 4, the rectifier side pole 1 high-end valve group commutates to 9 gears, the pole 1 low-end valve group and the pole 2 valve group commutators are both 8 gears, and the standard shift gears are calculated. The position is 8 gears, and the modified firing angle is: α high end =18°+2°*1=20°; α low end =12°; α high end op ＝16°; α low end op ＝16°; enter the step 4;
步骤4、α 高端>α 低端+1.5°，进入步骤6； Step 4. α high end > α low end + 1.5°, go to step 6;
步骤6、初步判断得知整流侧极1UdH测量偏高或者整流侧极1UdM测量偏低，进入步骤8；Step 6. Preliminary judgement is that the 1UdH measurement of the rectifier side pole is too high or the 1UdM measurement of the rectifier side pole is too low, go to step 8;
步骤8、判断关系1和关系2： Step 8. Determine relationship 1 and relationship 2:
关系1 α 高端>α 高端op+1.5°且|UdH-UdM|<|UdH op-UdM op|，或者α 高端<α 高端op+1.5°且|UdH-UdM|>|UdH op-UdM op|。 Relationship 1 α high-end >α high-end op +1.5°and |UdH-UdM|<|UdH op -UdM op |, or α high-end <α high-end op +1.5° and |UdH-UdM|>|UdH op -UdM op | .
关系2 α 低端>α 低端op+1.5°且|UdM-UdN|<|UdM op-UdN op|，或者α 低端<α 低端op+1.5°且|UdM-UdN|>|UdM op-UdN op。 Relationship 2 α low end >α low end op +1.5°and |UdM-UdN|<|UdM op -UdN op |, or α low end < αlow end op +1.5°and |UdM-UdN|>|UdM op -UdN op .
可知，关系1不满足，关系2满足，进入步骤9；It can be seen that the relationship 1 is not satisfied, and the relationship 2 is satisfied, and then go to step 9;
步骤9、关系1和关系2存在不满足的情况，进入步骤11。Step 9. If relationship 1 and relationship 2 are not satisfied, go to step 11.
步骤11、整流侧极1UdH测量存在偏高异常，测量异常判断流程结束。Step 11. The 1UdH measurement of the rectifier side pole is abnormally high, and the measurement abnormality judgment process ends.
从上述判断结论可以发现本发明的一种特高压直流整流侧电压测量异常判断方法，仅利用整流侧数据可以准确识别测量异常和异常测点。From the above judgment conclusions, it can be found that the method for judging abnormalities in UHV DC rectifier side voltage measurement of the present invention can accurately identify measurement abnormalities and abnormal measurement points using only the rectifier side data.
上述实施例只是为了说明本发明的技术构思及特点，其目的是在于让本领域内的普通技术人员能够了解本发明的内容并据以实施，并不能以此限制本发明的保护范围。凡是根据本发明内容的实质所做出的等效的变化或修饰，都应涵盖在本发明的保护范围内。The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present invention, and their purpose is to enable those of ordinary skill in the art to understand the content of the present invention and implement them accordingly, and should not limit the protection scope of the present invention. All equivalent changes or modifications made according to the essence of the present invention should be covered by the protection scope of the present invention.

Claims (6)

  1. 一种特高压直流整流侧电压测量异常判断方法，其特征在于：包括以下步骤：A method for judging abnormalities in UHV DC rectifier side voltage measurement, which is characterized in that it comprises the following steps:
    步骤1、检测整流站高端阀组触发角α * 高端和低端阀组触发角α * 低端，以及对极高端阀组触发角α * 高端op和低端阀组触发角α * 低端op； Step 1, detecting the rectifier firing angle α * high-valve upper and lower ends valve firing angle α * low end and high end of the pole angle α * trigger valve op high and low low-side valve firing angle α * op ；
    步骤2、检测整流站高压母线电压UdH、高低阀组中点电压UdM、低压母线电压UdN，以及对极的高压母线电压UdH op、高低阀组中点电压UdM op、低压母线电压UdN op； Step 2. Detect the high-voltage bus voltage UdH of the rectifier station, the midpoint voltage UdM of the high and low valve group, the low voltage bus voltage UdN, and the opposite high voltage bus voltage UdH op , the midpoint voltage of the high and low valve group UdM op , and the low voltage bus voltage UdN op ;
    步骤3、将α * 高端，α * 低端，α * 高端op，α * 低端op修正至标准换流变档位下，得到修正后的触发角α 高端，α 低端，α 高端op，α 低端op； Step 3. Correct α * high end , α * low end , α * high end op , α * low end op to the standard shifting gear position to obtain the corrected firing angle α high end , α low end , and α high end op . α low-end op ;
    步骤4、判断是否满足α 高端>α 低端+1.5°； Step 4. Determine whether α high end > α low end + 1.5° is satisfied;
    A.若满足则进入步骤6；A. If satisfied, go to step 6;
    B.若不满足则进入步骤5；B. If not satisfied, go to step 5;
    步骤5、判断是否满足α 低端>α 高端+1.5°； Step 5. Determine whether α low end > α high end + 1.5° is satisfied;
    A.若满足则进入步骤7；A. If satisfied, go to step 7;
    B.若不满足则进入步骤10；B. If not satisfied, go to step 10;
    步骤6、初步判断得知整流侧UdH测量偏高或者整流侧UdM测量偏低，进入步骤8；Step 6. Preliminary judgment is that the UdH measurement on the rectifier side is too high or the UdM measurement on the rectifier side is too low, go to step 8;
    步骤7、初步判断得知整流侧UdH测量偏低或者整流侧UdM测量偏高，进入步骤8；Step 7. Preliminary judgement is that the UdH measurement on the rectifier side is low or the UdM measurement on the rectifier side is too high, go to step 8;
    步骤8、判断关系1和关系2：Step 8. Determine relationship 1 and relationship 2:
    关系1：α 高端>α 高端op+1.5°且|UdH-UdM|<|UdH op-UdM op|，或者α 高端<α 高端op+1.5°且|UdH-UdM|>|UdH op-UdM op|； Relationship 1: α high-end >α high-end op +1.5°and |UdH-UdM|<|UdH op -UdM op |, or α high-end <α high-end op +1.5°and |UdH-UdM|>|UdH op -UdM op |;
    关系2：α 低端>α 低端op+1.5°且|UdM-UdN|<|UdM op-UdN op|，或者α 低端<α 低端op+1.5°且|UdM-UdN|>|UdM op-UdN op|； Relationship 2: α low end >α low end op +1.5°and |UdM-UdN|<|UdM op -UdN op |, or α low end < αlow end op +1.5°and |UdM-UdN|>|UdM op -UdN op |;
    判断完成后进入步骤9；After the judgment is completed, go to step 9;
    步骤9、判断关系1和关系2的满足情况：Step 9. Determine the satisfaction of relationship 1 and relationship 2:
    A.关系1和关系2均满足，则进入步骤12；A. If both relationship 1 and relationship 2 are satisfied, then go to step 12;
    B.关系1和关系2存在不满足的情况，则进入步骤11；B. If relationship 1 and relationship 2 are not satisfied, go to step 11;
    步骤10、无测量异常，测量异常判断流程结束；Step 10. There is no measurement abnormality, and the measurement abnormality judgment process ends;
    步骤11、整流侧UdH测量存在异常，测量异常判断流程结束；Step 11. The UdH measurement on the rectifier side is abnormal, and the measurement abnormality judgment process ends;
    步骤12、整流侧UdM测量存在异常，测量异常判断流程结束。Step 12. The UdM measurement on the rectifier side is abnormal, and the measurement abnormality judgment process ends.
  2. 根据权利要求1所述的一种特高压直流整流侧电压测量异常判断方法，其特征在于：步骤3中，标准换流变档位为整流侧所有档位平均值的四舍五入，且只保留整数。The method for judging abnormal voltage measurement on the UHV DC rectifier side according to claim 1, wherein in step 3, the standard commutation gear position is rounded off the average value of all gear positions on the rectifier side, and only integers are reserved.
  3. 根据权利要求2所述的一种特高压直流整流侧电压测量异常判断方法，其特征在于：步骤3中：α 高端的计算方法如下： The method for judging abnormalities in UHV DC rectifier side voltage measurement according to claim 2, characterized in that: in step 3: the calculation method of α high end is as follows:
    若高端阀组实际档位大于标准换流变档位k档，则α 高端＝α * 高端+2°*k； If the actual gear position of the high-end valve group is greater than the standard shift variable gear position k, α high-end = α * high-end + 2°*k;
    若高端阀组实际档位小于标准换流变档位k档，则α 高端＝α * 高端-2°*k； If the actual gear position of the high-end valve group is smaller than the standard shift variable gear position k, α high-end = α * high-end -2°*k;
    若高端阀组实际档位等于标准换流变档位k档，则α 高端＝α * 高端。 If the actual gear position of the high-end valve group is equal to the standard shift variable gear position k, then α high-end = α * high-end .
  4. 根据权利要求2所述的一种特高压直流整流侧电压测量异常判断方法，其特征在于：步骤3中：α 低端的计算方法如下： The method for judging abnormal voltage measurement on the UHV DC rectifier side according to claim 2, characterized in that: in step 3: the calculation method for the low end of α is as follows:
    若低端阀组实际档位大于标准换流变档位k档，则α 低端＝α * 低端+2°*k； If the actual gear position of the low-end valve group is greater than the standard shift variable gear position k, then α low end = α * low end + 2°*k;
    若低端阀组实际档位小于标准换流变档位k档，则α 低端＝α * 低端-2°*k； If the actual gear position of the low-end valve group is smaller than the standard shift variable gear position k, then α low end = α * low end -2°*k;
    若低端阀组实际档位等于标准换流变档位k档，则α 低端＝α * 低端。 If the actual gear position of the low-end valve group is equal to the standard shift variable gear position k, then α low end = α * low end .
  5. 根据权利要求2所述的一种特高压直流整流侧电压测量异常判断方法，其特征在于：步骤3中：α * 高端op的计算方法如下： The method for judging abnormal voltage measurement on the UHV DC rectifier side according to claim 2, characterized in that: in step 3: the calculation method of α* high-end op is as follows:
    若对极高端阀组实际档位大于标准换流变档位k档，则α 高端op＝α * 高端op+2°*k； If the actual gear position of the extremely high-end valve group is greater than the standard shift variable gear position k, α high-end op =α * high-end op +2°*k;
    若对极高端阀组实际档位小于标准换流变档位k档，则α 高端op＝α * 高端op-2°*k； If the actual gear position of the extremely high-end valve group is smaller than the standard shift variable gear position k, α high-end op =α * high-end op -2°*k;
    若对极高端阀组实际档位等于标准换流变档位k档，则α 高端op＝α * 高端op。 If the actual gear position of the extremely high-end valve group is equal to the standard shift variable gear position k, then α high-end op =α * high-end op .
  6. 根据权利要求2所述的一种特高压直流整流侧电压测量异常判断方法，其特征在于：步骤3中：α * 低端op的计算方法如下： The method for judging abnormal voltage measurement on the UHV DC rectifier side according to claim 2, characterized in that: in step 3: the calculation method of α * low end op is as follows:
    若对极低端阀组实际档位大于标准换流变档位k档，则α 低端op＝α * 低端op+2°*k； If the actual gear position of the very low-end valve group is greater than the standard shift variable gear position k, then α low-end op =α * low-end op +2°*k;
    若对极低端阀组实际档位小于标准换流变档位k档，则α 低端op＝α * 低端op-2°*k； If the actual gear position of the very low-end valve group is smaller than the standard shift variable gear position k, then α low-end op =α * low-end op -2°*k;
    若对极低端阀组实际档位等于标准换流变档位k档，则α 低端op＝α * 低端op。 If the actual gear position of the very low-end valve group is equal to the standard shift variable gear position k, then α low-end op = α * low-end op .
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