WO2015035687A1 - 一种电网继电保护隐性故障远程监测定位装置 - Google Patents

一种电网继电保护隐性故障远程监测定位装置 Download PDF

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Publication number
WO2015035687A1
WO2015035687A1 PCT/CN2013/085933 CN2013085933W WO2015035687A1 WO 2015035687 A1 WO2015035687 A1 WO 2015035687A1 CN 2013085933 W CN2013085933 W CN 2013085933W WO 2015035687 A1 WO2015035687 A1 WO 2015035687A1
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Prior art keywords
protection
action
contact
gate
protection device
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PCT/CN2013/085933
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English (en)
French (fr)
Inventor
王世祥
王玮
钱敏
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深圳供电局有限公司
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Publication of WO2015035687A1 publication Critical patent/WO2015035687A1/zh

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08Locating faults in cables, transmission lines, or networks
    • G01R31/081Locating faults in cables, transmission lines, or networks according to type of conductors
    • G01R31/086Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
    • Y04S10/52Outage or fault management, e.g. fault detection or location

Definitions

  • the invention relates to a remote monitoring and positioning device for hidden faults of power grid relay protection.
  • the application is submitted to the Chinese Patent Office on September 12, 2013, and the application number is 201310416298.X.
  • the invention name is "a remote monitoring of hidden faults of power grid relay protection”.
  • the invention relates to the technical field of electric power, in particular to a remote monitoring and positioning device for hidden faults of power grid relay protection. Background technique
  • the external causes are: Earthquakes, typhoons, mountain fires, lightning, landslides, severe faults, human error, etc. may cause one or more lines to trip and eventually lead to large-scale power outages, which is often difficult to control artificially.
  • the internal factors are as follows: equipment operation reliability is not high, protection configuration is unreasonable, secondary circuit design defects cannot be effectively tracked, protection setting error or incorrect operation, safety check calculation misalignment, component overload is not timely diverted, and stability control strategy If the setting is unreasonable, the prevention or emergency control measures are not timely, and the distance m protection is misplaced during the trend transfer process. These factors directly or indirectly increase the probability and form of source faults, make it difficult to accurately predict, and contribute to the expansion of faults.
  • a recessive fault means that the system has no effect on the system during normal operation, but occurs in certain parts of the system. When it changes, it will be triggered to cause an accident, and it may lead to a large-scale blackout.
  • Implicit faults are not detectable during normal system operation, but in the event of a fault, the relay will experience an amount of electrical power sufficient to cause it to operate, which can easily cause a malfunction of the protection system with a hidden fault.
  • Each type of hidden fault has a risk zone associated with it.
  • an abnormal event such as a line fault
  • the relay protection device with a hidden fault associated with this zone will not operate correctly.
  • the L1 protection device on the same bus line acts, it may trigger the hidden faults of L2, L3, L4, L5 and main transformer B on the same bus, thus forming a relay protection faulty fault line ( Components) Clusters, such high-risk areas are the most serious threat to the grid.
  • the protection device Due to the long running time of the protection device, some components fail, and they are not exposed during normal operation, and can only be found during regular inspection work. If the protection device fails between the two calibration periods, only if the protection device fails or waits for the next verification to find the fault, if the power system fails during the period, the failed protection will not operate correctly.
  • the causes of grid faults can be broadly divided into three categories: one-step relay protection device hardware and secondary loop defects, including CT/PT measuring component failure, protection component aging, poor contact, insulation aging, Causes of wiring errors, communication system failures, environmental damage, and component damage caused by incorrect human intervention.
  • the relay protection setting is unreasonable, including protection setting calculation error, calibration error, tuning execution error, and protection setting obsolescence not adapting to the current operation mode.
  • the protection setting value is not adjusted as necessary, even if the relay is operating normally, there will still be hidden faults due to unreasonable tuning.
  • this kind of hidden fault can be corrected and controlled by the relay protection personnel by protecting the periodic check.
  • the principle of relay protection configuration is insufficient; the line protection device does not have the phase selection function in the case of complex faults, and the protection oscillation blocking logic is not configured.
  • the main culprit for causing large-scale blackouts is the above-mentioned relays that are lurking in the grid for a long time. Protection system hidden faults. According to statistics, more than 70% of large-scale blackouts in the world are related to the incorrect operation of relay protection systems. Controlling hidden faults in relay protection has become a hot spot in the world's power grid security research.
  • the present invention provides a remote monitoring and positioning device for hidden faults of a power grid relay protection, including:
  • Protecting 1 an action contact, which is connected to the protection device 1 of the faulty line segment, and receives an action signal of the protection device 1;
  • Protecting 2 action contacts which are connected to the protection device 2 of the non-faulty line segment, and receive an action signal of the protection device 2;
  • a 1TWJ hopping monitoring contact which is connected to the circuit breaker DL1 of the faulty line segment, and receives a hopping signal of the circuit breaker DL1;
  • a 2TWJ hopping monitoring contact which is connected to the circuit breaker DL2 of the non-faulty line segment, and receives a hopping signal of the circuit breaker DL2;
  • the first AND gate is connected to the protection 1 action contact, the protection 2 action contact, the 1TWJ jump position monitoring contact, and the 2TWJ jump position monitoring contact, and is configured to receive the action at the protection 1 action contact and the protection 2 action contact.
  • a signal, the 1TWJ jump position monitoring contact, and the 2TWJ jump position monitoring contact output a high level signal when receiving the jump position signal;
  • the protection device 2 is configured to be connected to the output end of the first AND gate, and when the first AND gate outputs a high level, the protection device 2 is positioned to malfunction;
  • a second AND gate connected to the protection 1 action contact, the protection 2 action contact, the 1TWJ jump position monitoring contact, and the 2TWJ jump position monitoring contact, for not receiving the action signal and the protection 2 action at the protection 1 action contact
  • the contact receives the action signal, the 1TWJ jump position monitoring contact does not receive the jump position signal, and the 2TWJ jump position monitor contact receives the jump position signal and outputs a high level signal;
  • the protection device 2 is configured to be connected to the output end of the second AND gate. When receiving the second AND gate output high level, the protection device 2 is positioned to be in a step-by-step operation.
  • the device further includes:
  • a third AND gate which is connected to the output end of the protection device 2, and the protection 1 action contact, the 1TWJ jump position monitoring contact, and the protection device 2 malfunctions the positioning module to output a high level,
  • the protection 1 action contact receives an action signal, and the 1TWJ jump position monitoring contact outputs a high level signal when receiving the jump bit signal;
  • the protection device 2 is configured to be connected to the output end of the third AND gate.
  • the third AND gate outputs a high level signal, the components and the fixed value of the protection device 2 are hidden. Sexual failure.
  • the device further includes:
  • the protection 1 voltage sampling loop contact is connected to the voltage transformer PT1 of the faulty line segment, and receives the voltage signal of the voltage transformer PT1.
  • the device further includes:
  • a fourth AND gate connected to the second AND gate and the protection 1 current sampling loop contact, and the second AND gate output high level and the protection 1 current sampling back to the ⁇ point output indicating the protection device 1 When the current fault amount is not correctly sampled, the output is high;
  • a CT loop recessive fault locating module of the protection device 1 is configured to be connected to the output end of the fourth AND gate, and when the fourth AND gate outputs a high level, the CT loop for positioning the protection device 1 is recessive malfunction.
  • the device further includes:
  • a fifth AND gate connected to the output end of the protection device 2 and the voltage sampling circuit of the protection device 1 , wherein the protection device 2 is operated by the positioning module to output a high level, the protection device 1
  • the voltage sampling loop contact output indicates that the voltage fault of the protection device 1 is not correctly sampled, and the output is high;
  • the PT loop recessive fault locating module of the protection device 1 is configured to be connected to the output end of the fifth AND gate.
  • the fifth AND gate When the fifth AND gate outputs a high level, the PT loop for positioning the protection device 1 is recessive. malfunction.
  • the device further includes:
  • a sixth AND gate the output of the protection device 2 and the step-by-step action positioning module, and the protection a protection current sampling loop contact and the protection 1 voltage sampling loop contact connection, for outputting a high level at an output end of the protection device 2 stepping operation positioning module, and the protection 1 current sampling loop contact output indicating a protection device
  • the current fault amount of 1 is correctly sampled, and the protection 1 voltage sampling loop contact output indicates that the voltage fault amount of the protection device 1 is correctly sampled, the output high level; the protection device 1 recessive fault locating module, and the
  • the sixth AND gate is connected to locate a hidden fault of the protection device 1 when the sixth AND gate outputs a high level.
  • the device further includes:
  • a seventh AND gate connected to the protection 1 action contact and the output end of the protection device 2 step-by-step operation positioning module, configured to receive an action signal at the protection 1 action contact receiving the protection 1 action contact, The protection device 2 outputs a high level signal when the output terminal of the step-by-step motion positioning module outputs a high level signal;
  • a DL1 circuit breaker circuit recessive fault locating module coupled to the seventh AND gate, configured to: when the seventh AND gate outputs a high level signal, locate the DL1 circuit breaker loop of the faulty line segment to be recessive malfunction.
  • the faulty line segment is at least one.
  • FIG. 1 is a schematic diagram of a prior art relay electrical protection recessive fault line set
  • Figure 2 is a schematic diagram of a substation llOkV single-branch power supply line
  • FIG. 3 is a schematic structural diagram of Embodiment 1 of a remote monitoring and positioning device for a hidden fault of a grid relay protection according to the present invention
  • Figure 4 is a schematic diagram of a substation llOkV multi-branch series power supply line
  • FIG. 5 is a schematic structural diagram of Embodiment 2 of a remote monitoring and positioning device for a hidden fault of a grid relay protection according to the present invention. detailed description
  • the invention provides a remote monitoring and positioning device for hidden faults of a power grid relay protection, comprising: a protection 1 action contact, which is connected with the protection device 1 of the faulty line segment, and receives an action signal of the protection device 1;
  • Protecting 2 action contacts which are connected to the protection device 2 of the non-faulty line segment, and receive an action signal of the protection device 2;
  • a 1TWJ hopping monitoring contact which is connected to the circuit breaker DL1 of the faulty line segment, and receives a hopping signal of the circuit breaker DL1;
  • a 2TWJ hopping monitoring contact which is connected to the circuit breaker DL2 of the non-faulty line segment, and receives a hopping signal of the circuit breaker DL2;
  • the first AND gate is connected to the protection 1 action contact, the protection 2 action contact, the 1TWJ jump position monitoring contact, and the 2TWJ jump position monitoring contact, and is configured to receive the action at the protection 1 action contact and the protection 2 action contact.
  • a signal, the 1TWJ jump position monitoring contact, and the 2TWJ jump position monitoring contact output a high level signal when receiving the jump position signal;
  • the protection device 2 is configured to be connected to the output end of the first AND gate, and when the first AND gate outputs a high level, the protection device 2 is positioned to malfunction;
  • a second AND gate connected to the protection 1 action contact, the protection 2 action contact, the 1TWJ jump position monitoring contact, and the 2TWJ jump position monitoring contact, for not receiving the action signal and the protection 2 action at the protection 1 action contact
  • the contact receives the action signal, the 1TWJ jump position monitoring contact does not receive the jump position signal, and the 2TWJ jump position monitor contact receives the jump position signal and outputs a high level signal;
  • the protection device 2 is arranged to be connected to the output end of the second AND gate. When the second AND gate output high level is received, the protection device 2 is positioned to be in a step-by-step operation.
  • the device further includes:
  • a third AND gate which is connected to the output end of the protection device 2, and the protection 1 action contact, the 1TWJ jump position monitoring contact, and the protection device 2 malfunctions the positioning module to output a high level,
  • the protection 1 action contact receives an action signal, and the 1TWJ jump position monitoring contact outputs a high level signal when receiving the jump bit signal;
  • the protection device 2 is configured to be connected to the output end of the third AND gate.
  • the third AND gate outputs a high level signal, the components and the fixed value of the protection device 2 are hidden. Sexuality Barrier.
  • the device further includes:
  • the protection 1 voltage sampling loop contact is connected to the voltage transformer PT1 of the faulty line segment, and receives the voltage signal of the voltage transformer PT1.
  • the device further includes:
  • a fourth AND gate connected to the second AND gate and the protection 1 current sampling loop contact, and the second AND gate output high level and the protection 1 current sampling back to the ⁇ point output indicating the protection device 1 When the current fault amount is not correctly sampled, the output is high;
  • a CT loop recessive fault locating module of the protection device 1 is configured to be connected to the output end of the fourth AND gate, and when the fourth AND gate outputs a high level, the CT loop for positioning the protection device 1 is recessive malfunction.
  • the device further includes:
  • a fifth AND gate connected to the output end of the protection device 2 and the voltage sampling circuit of the protection device 1 , wherein the protection device 2 is operated by the positioning module to output a high level, the protection device 1
  • the voltage sampling loop contact output indicates that the voltage fault of the protection device 1 is not correctly sampled, and the output is high;
  • the PT loop recessive fault locating module of the protection device 1 is configured to be connected to the output end of the fifth AND gate.
  • the fifth AND gate When the fifth AND gate outputs a high level, the PT loop for positioning the protection device 1 is recessive. malfunction.
  • the device further includes:
  • the protection device 1 is a recessive fault locating module, and is connected to the sixth AND gate, and is configured to locate the protection device 1 when the sixth AND gate outputs a high level. Implicit failure.
  • the device further includes: a seventh AND gate connected to the protection 1 action contact and the output end of the protection device 2 step-by-step operation positioning module, configured to receive an action signal at the protection 1 action contact receiving the protection 1 action contact, The protection device 2 outputs a high level signal when the output terminal of the step-by-step motion positioning module outputs a high level signal;
  • a DL1 circuit breaker circuit recessive fault locating module coupled to the seventh AND gate, configured to: when the seventh AND gate outputs a high level signal, locate the DL1 circuit breaker loop of the faulty line segment to be recessive malfunction.
  • the faulty line segment is at least one.
  • the graphical symbols in Figure 2 illustrate: DL1—“DL4 is the circuit breaker; CT1———4 is the secondary winding of the circuit transformer; protection1, protection 2 is the protection device corresponding to DL1 and DL2 circuit breaker; d is the fault point A, B, CN are substation busbars.
  • the BC segment d point fault is a faulty line segment, and the AB segment is a non-faulty line segment;
  • protection 1 action, protection 2 should not operate; but if protection 2 has a hidden fault, protection 1 action, protection 2 may also act, it is an incorrect action, it also becomes a malfunction .
  • the hidden faults in the two cases are as follows: Take the grid relay protection hidden fault remote monitoring and positioning device as shown in Figure 3 for tracking and positioning.
  • 1TWJ is the circuit breaker DL1 hopping monitoring contact
  • 2TWJ is the circuit breaker DL2 hopping monitoring contact.
  • Protection 1 action, protection 2 action is to protect the action contact of protection 1 and protection 2 under the condition of protection.
  • the protection 1 current sampling loop contact is a contact connected to the CT of the protection device 1
  • the protection 1 voltage sampling loop contact is a contact connected to the PT of the protection device 1;
  • the AND gate & 1 in the figure is the first AND gate, With the door & 2 for the second and the door, and so on.
  • protection 1 action contact 1TWJ action contact
  • protection 2 action contact protection 2 action contact
  • 2TWJ action contact protection 1 current sampling loop contact
  • protection 1 voltage sampling loop contact protection 1 voltage sampling loop contact and other contacts received signals All of them are connected to the logic circuit composed of the AND gates &1 ⁇ AND gates & 7 through the station side switch.
  • the BC segment d point fault (the existing fault monitoring or tracking technology can be used to know where the bus segment has failed).
  • protection 2 protection 1 are all active, 1TWJ, 2TWJ are all action, this If the AND gate &1 action (ie, output high level signal), AND gate & 2 does not operate (output low level signal), it indicates that the protection 2 in the lOkV single branch is an incorrect action (ie, malfunction); 1.
  • the 1TWJ action check confirms that the AND gate & 3 action has a high level signal, which can locate the protection 2 device components and fixed values and other hidden faults.
  • the BC segment d point is faulty. If the protection 2 and 2TWJ are in the logic diagram of Figure 3, the protection 1 and 1TWJ are not active. At this time, the gate & 2 action outputs a high level signal, and the AND gate &1 does not. Action, output low-level signal, indicating that the protection 2 in the single-branch of the llOkV, although operating correctly, is a leap-level trip. At the same time, the current fault amount of protection 1 is not correctly sampled and confirmed. The gate & 4 action has an output high level signal, and the CT loop of the protection 1 can be hidden.
  • the BC segment d point is faulty. If the protection 2 and 2TWJ are in the logic diagram of Figure 3, the protection 1 and 1TWJ are not active. At this time, the gate & 2 action outputs a high level signal, and the AND gate &1 does not. The action outputs a low-level signal, indicating that the protection 2 in the single-branch of the llOkV, although operating correctly, is a leap-level trip. At the same time, the voltage fault amount of protection 1 is not correctly sampled and confirmed, and the gate & 5 action has an output high level signal, and the PT loop of the protection 1 can be hidden.
  • the BC segment d point is faulty. If the protection 2 and 2TWJ are in the logic diagram of Figure 3, the protection 1 and 1TWJ are not active. At this time, the gate & 2 action outputs a high level signal, and the AND gate &1 does not. The action outputs a low-level signal, indicating that the protection 2 in the single-branch of the llOkV, although operating correctly, is a leap-level trip. At the same time, the current and voltage fault amount of protection 1 is correctly sampled and confirmed, and the gate & 6 action has an output high level signal, and the device that can locate the protection 1 has a hidden fault.
  • the BC segment d point is faulty. If the protection 2 and 2TWJ are in the logic diagram of Figure 3, the protection 1 and 1TWJ are not active. At this time, the gate & 2 action outputs a high level signal, and the AND gate &1 does not. The action outputs a low-level signal, indicating that the protection 2 in the single-branch of the llOkV, although operating correctly, is a leap-level trip. At the same time, the protection action 1 and the door & 7 action have an output high level signal, and the circuit breaker mechanism of the DL1 can be positioned to have a hidden fault.
  • the invention is also applicable to the case of a multi-branch series power supply line of a substation (having n llOkV branches), as shown in FIG.
  • DL1 DLn is a circuit breaker
  • CTl-n is a circuit mutual The secondary winding of the sensor
  • d is the fault point on the nth branch
  • A, B, CN, N+l are the substation busbars
  • protection n is the protection device corresponding to the DLn breaker.
  • the BC, BN segment d point fault is a faulty line segment
  • the AB segment is a non-faulty line segment.
  • the substation multi-branch series power supply line adopts the power grid relay protection hidden fault remote monitoring and positioning device shown in Figure 5 for tracking and positioning.
  • the graphical symbol in Figure 5 illustrates: 1TWJ ⁇ ! lTWJ is the circuit breaker DL1 ⁇ DLn jump position monitoring contact, and 2TWJ is the circuit breaker DL2 jump position monitoring contact.
  • Protects the 1-n action protects the 2 action, and protects the n-7 action as the action contact for protection 1 to protection n and protection 2 when the condition is protected.
  • the voltage sampling back is the contact point on the PT connected to the protection devices l ⁇ n ;
  • the AND gate &1 is the first AND gate, the AND gate & 2 is the second AND gate, and so on.
  • 1 is OR gate 1
  • > 2 is OR gate > 2, - analogy.
  • protection 1 ⁇ ! ! Action contact 1 ⁇ ! lTWJ action contact
  • protection 2 action contact protection 1 ⁇ ! !
  • Current sampling loop contacts protection 1 ⁇ ! !
  • the signals received by the voltage sampling loop contacts and other contacts are connected to the AND gate through the station switch. ⁇ 1 ⁇ with the door &1! ⁇ 7, OR gate > 1 ⁇ 7 and other components of the logic circuit.
  • the point D of the BN segment is faulty. If the protection 2 and the protection n are both in the logic diagram of Fig. 5, the nTWJ and 2TWJ are both active. At this time, the gate &n-l action, the AND gate &n-2 do not operate, The protection 2 in the single branch of llOkV belongs to the incorrect action (misoperation); at the same time, the n and nTWJ actions are confirmed, and the gate &n-3 action has an output high level, or the gate > 1 has an output high level, which can be positioned. There are hidden faults in the protection of 2 device components and settings.
  • the BN segment has a d-point fault.
  • the gate &n-2 action outputs a high level, AND gate &n- l Do not operate output low level, indicating that the protection 2 in the 11 OkV single branch, although correct action, is a leap forward trip.
  • the current fault amount of protection n is not correctly sampled and confirmed.
  • the gate &n-4 action has an output high level, or the gate > 2 has an output high level, and the 01 loop of the protection 11 can be hidden, wherein n ⁇ 2.
  • the BN segment has a d-point fault.
  • the gate &n-2 action outputs a high level, AND gate &n- l Does not operate output low level, indicating that the protection 2 in the single branch of llOkV, although it operates correctly, is a leap-level trip.
  • the voltage fault amount of protection n is not correctly sampled and confirmed.
  • the gate &n-5 action has an output high level, or gate. > 3 has an output high level, and there is a hidden fault in the PT loop that can locate protection n, where ⁇ 2.
  • Figure 4 shows the fault in point d in the middle section. If the protection 2 and 2TWJ in the logic diagram of Figure 5 are both active; n and nTWJ are not active, and the gate &n-2 action outputs a high level. &n-l does not operate to output a low level, indicating that the protection 2 in the l lOkV single branch, although operating correctly, is a leap forward trip. At the same time, the current and voltage faults of protection n are correctly sampled and confirmed.
  • the gate &n-6 action has an output high level, or the gate > 4 has an output high level, and the device that can locate the protection n has a hidden fault, where n ⁇ 2 .
  • the BN segment has a d-point fault.
  • the gate &n-2 action outputs a high level, AND gate &n- l
  • the output of the non-action is low, indicating that the protection 2 in the l lOkV single-branch is correct, but it is a leap-level trip.
  • the protection n action confirms that the AND gate -7 action has an output high level, or the gate > 5 has an output high level, and the circuit breaker mechanism that can locate the DLn has a hidden fault, where n ⁇ 2.
  • the hidden fault of the relay protection of the power grid can be checked in time and effectively, the serious accident of the power grid can be avoided, and the safe and stable operation of the power grid can be ensured.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM). It is to be understood that the specific embodiments of the invention are limited only by the description. It will be apparent to those skilled in the art that the present invention may be practiced without departing from the spirit and scope of the invention.

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Abstract

本发明提供一种电网继电保护隐性故障远程监测定位装置,包括:保护1动作接点,保护2动作接点,1TWJ跳位监视接点,2TWJ跳位监视接点;第一与门,用于在保护1动作接点、保护2动作接点均收到动作信号,1TWJ跳位监视接点、2TWJ跳位监视接点均收到跳位信号时输出高电平信号;保护装置2误动定位模块,用于定位保护装置2误动作;第二与门,用于在保护1动作接点未收到动作信号、保护2动作接点收到动作信号,1TWJ跳位监视接点未收到跳位信号、2TWJ跳位监视接点收到跳位信号时输出高电平信号;保护装置2越级动作定位模块,用于定位保护装置2越级动作。实施本发明,可以及时有效的检查出电网继电保护隐性故障,避免继电保护隐性故障再次引起电网重大事故的发生,保证电网安全稳定运行。

Description

一种电网继电保护隐性故障远程监测定位装置 本申请要求于 2013 年 9 月 12 日提交中国专利局、 申请号为 201310416298.X ,发明名称为 "一种电网继电保护隐性故障远程监测定位装置" 的中国专利申请的优先权, 其全部内容通过 !用结合在本申请中。 技术领域
本发明涉及电力技术领域, 尤其涉及一种电网继电保护隐性故障远程监测 定位装置。 背景技术
电力系统大面积停电几乎都是由连锁故障引发的。 从历次大停电事故形成 过程来看, 各类关联事件的相继诱发是其主要表现形式, 故障因此快速扩散并 最终达到不受控状态。 对处于连锁故障中的电力系统而言, 关联事件的关键演 变特征决定了系统最终的发展态势, 也决定了事故最终影响程度。 大面积停电 事故中连锁故障存在各种难以预计的内外因素共同交织作用, 形成了事故扩大 的驱动力。
外因表现为: 地震、 台风、 山火、 雷电、 滑坡、 严重故障、 人为误操作等 都可能导致一条或者多条线路跳闸最终导致大面积停电, 这往往是很难人为控 制的。
内因表现为: 设备运行可靠性不高、 保护配置不合理、 二次回路设计缺陷 无法有效跟踪, 保护整定错误或不正确动作、 安全校核计算失准、 元件过载未 获及时疏导、 稳控策略设定不合理、 预防或紧急控制措施不及时, 距离 m段保 护在潮流转移过程中误动等。 这些因素直接或间接地增加了源发故障的概率与 形式, 难以准确预测, 对故障扩大起到推波助澜的作用。
值得关注的是, 在连锁故障形成过程中, 虽然是内外因素共同交织作用推 动连锁故障形成, 但导致电网大面积停电的关键因素还是内因, 这些在常规安 全校核难以涉及的隐性故障具有高度不确定性, 也是常规的运行监视无法监控 的, 无法定位。
隐性故障是指在系统正常运行时对系统没有影响, 而当系统某些部分发生 变化时, 就会被触发造成事故的扩大, 并且可能导致大面积停电事故的发生。 具有以下特点:
隐性故障的潜伏性。 隐性故障在系统正常运行时是无法发现的, 但是一旦 有故障发生, 继电器将感受足以使其动作的电气量, 此状态下极易使得带有隐 性故障的保护系统误动。
隐性故障触发的风险区域性。 每一种隐性故障都有一个风险区域与之相关, 当某个异常事件(如线路故障)在风险区域发生, 则与此区域相关的存在隐性 故障的继电保护装置将不正确动作。 如当某条线路发生故障, 与之同一母线上 的其它线路、 主变等由于此时潮流转移等原因触发隐性故障, 引起事故扩大。 如图 1所示, 当同母线上的 L1的保护装置动作后, 可能触发同母线上的 L2、 L3、 L4、 L5及主变 B的隐性故障, 从而形成继电保护隐性故障线路(元件)集 区, 此类高风险区域对电网威胁是最严重的。
由于隐性故障的存在, 当电力系统发生异常时造成保护装置的拒动或误动 作, 导致电力系统故障范围的扩大。
保护装置由于运行时间长, 导致某些部件出现故障, 在正常运行中未暴露 出来, 定期检查工作中才能发现。 若保护装置在两次校验期之间出现故障, 只 有等保护装置功能失效或等下一次校验才能发现故障, 如果期间电力系统发生 故障, 失效的保护将不能正确动作。
经过大量国内外电网事故分析, 引起电网故障原因可以大致分为三类: 一一继电保护装置硬件及二次回路缺陷, 包括 CT/PT测量元件故障、 保护 元件老化、 接触不良、 绝缘老化、 接线错误、 通信系统故障、 环境和不正确的 人为干涉引起的元件损坏等原因。
一一继电保护定值不合理, 包括保护定值整定计算错误、 校验错误、 整定 执行错误、 保护定值过时不适应当前运行方式等。 特别是当实际电网发生很大 变化, 而保护整定值却没有进行必要的调整, 此时即使继电器正常运行, 但是 由于不合理的整定仍然会存在隐性故障。 当然, 这种隐性故障可以由继电保护 人员通过保护定期校验来予以校正、 控制。
一一继电保护配置原理不足; 包括线路保护装置不具备复杂故障情况下的 选相功能、 未配置保护振荡闭锁逻辑等。
显然, 造成大规模停电事故的罪魁祸首正是上述长期潜伏在电网中的继电 保护系统隐性故障。 有资料表明, 世界上大约有 70%以上的大面停电事故都和 继电保护系统不正确运行有关。 控制继电保护隐性故障, 已经成为当今世界电 网安全研究的热点。
现有技术中, 尚未见到继电保护系统隐性故障监视和定位方法及装置, 但 继电保护系统隐性故障时时威胁电网安全稳定运行, 是当今世界亟待解决的技 术问题。 发明内容
为解决上述技术问题, 本发明提供一种电网继电保护隐性故障远程监测定 位装置, 包括:
保护 1动作接点, 其与故障线路段的保护装置 1连接,接收所述保护装置 1 的动作信号;
保护 2动作接点, 其与非故障线路段的保护装置 2连接, 接收所述保护装 置 2的动作信号;
1TWJ跳位监视接点, 其与所述故障线路段的断路器 DL1连接, 接收所述 断路器 DL1的跳位信号;
2TWJ跳位监视接点, 其与所述非故障线路段的断路器 DL2连接, 接收所 述断路器 DL2的跳位信号;
第一与门, 其与所述保护 1动作接点、 保护 2动作接点、 1TWJ跳位监视接 点、 2TWJ跳位监视接点连接, 用于在所述保护 1动作接点、 保护 2动作接点均 收到动作信号, 所述 1TWJ跳位监视接点、 2TWJ跳位监视接点均收到跳位信号 时输出高电平信号;
保护装置 2误动定位模块, 用于与所述第一与门的输出端连接, 在接收到 所述第一与门输出高电平时, 定位所述保护装置 2误动作;
第二与门, 其与所述保护 1动作接点、 保护 2动作接点、 1TWJ跳位监视接 点、 2TWJ跳位监视接点连接, 用于在所述保护 1动作接点未收到动作信号、 保 护 2动作接点收到动作信号, 所述 1TWJ跳位监视接点未收到跳位信号、 2TWJ 跳位监视接点收到跳位信号时输出高电平信号;
保护装置 2越级动作定位模块, 用于与所述第二与门的输出端连接, 在接 收到所述第二与门输出高电平时, 定位所述保护装置 2越级动作。 其中, 所述装置还包括:
第三与门, 其与所述保护装置 2误动定位模块的输出端, 以及所述保护 1 动作接点, 1TWJ跳位监视接点连接, 在所述保护装置 2误动定位模块输出高电 平, 所述保护 1动作接点收到动作信号, 所述 1TWJ跳位监视接点收到跳位信 号时, 输出高电平信号;
保护装置 2 隐性故障定位模块, 用于与所述第三与门的输出端连接, 在所 述第三与门输出高电平信号时, 定位所述保护装置 2 的元件及定值存在隐性故 障。
其中, 所述装置还包括:
保护 1电流采样回路接点,其与所述故障线路段的电流互感器二次绕阻 CT1 连接, 接收所述电流互感器二次绕阻 CT1的电流信号;
保护 1电压采样回路接点, 其与所述故障线路段的电压互感器 PT1连接, 接收所述电压互感器 PT1的电压信号。
其中, 所述装置还包括:
第四与门, 其与所述第二与门和所述保护 1 电流采样回路接点连接, 在所 述第二与门输出高电平和所述保护 1 电流采样回^^点输出表示保护装置 1的 电流故障量未得到正确采样时, 输出高电平;
保护装置 1的 CT回路隐性故障定位模块,用于与所述第四与门的输出端连 接, 在所述第四与门输出高电平时, 定位所述保护装置 1的 CT回路存在隐性故 障。
其中, 所述装置还包括:
第五与门, 其与所述保护装置 2越级动作定位模块的输出端, 以及所述保 护装置 1电压采样回路连接, 在所述保护装置 2越级动作定位模块输出高电平, 所述保护装置 1 电压采样回路接点输出表示保护装置 1 的电压故障量未得到正 确采样时, 输出高电平;
保护装置 1的 PT回路隐性故障定位模块,用于与所述第五与门的输出端连 接, 在所述第五与门输出高电平时, 定位所述保护装置 1的 PT回路存在隐性故 障。
其中, 所述装置还包括:
第六与门, 其与所述保护装置 2越级动作定位模块的输出端, 以及所述保 护 1 电流采样回路接点和所述保护 1 电压采样回路接点连接, 用于在所述保护 装置 2越级动作定位模块的输出端输出高电平, 以及所述保护 1 电流采样回路 接点输出表示保护装置 1 的电流故障量得到正确采样, 以及所述保护 1 电压采 样回路接点输出表示保护装置 1的电压故障量得到正确采样时, 输出高电平; 保护装置 1 隐性故障定位模块, 其与所述第六与门连接, 用于在所述第六 与门输出高电平时, 定位所述保护装置 1存在隐性故障。
其中, 所述装置还包括:
第七与门, 其与所述保护 1动作接点以及所述保护装置 2越级动作定位模 块的输出端连接, 用于在所述保护 1动作接点接收到保护 1动作接点收到动作 信号, 所述保护装置 2越级动作定位模块输出端输出高电平信号时, 输出高电 平信号;
DL1 断路器回路隐性故障定位模块, 其与所述第七与门连接, 用于在所述 第七与门输出高电平信号时, 定位所述故障线路段的 DL1断路器回路存在隐性 故障。
其中, 所述故障线路段为至少一条。
实施本发明, 可以及时有效的检查出电网继电保护隐性故障, 避免电网重 大事故, 保证电网安全稳定运行。 附图说明 例或现有技术描述中所需要使用的附图作简单地介绍, 显而易见地, 下面描述 中的附图仅仅是本发明的一些实施例, 对于本领域普通技术人员来讲, 在不付 出创造性劳动的前提下, 还可以根据这些附图获得其他的附图。
图 1为现有技术中继电保护隐性故障线路集示意图;
图 2为变电站 llOkV单支路供电线路的示意图;
图 3 为本发明提供的一种电网继电保护隐性故障远程监测定位装置实施例 一的结构示意图;
图 4为变电站 llOkV多支路串联供电线路的示意图;
图 5 为本发明提供的一种电网继电保护隐性故障远程监测定位装置实施例 二的结构示意图。 具体实施方式
本发明提供一种电网继电保护隐性故障远程监测定位装置, 包括: 保护 1动作接点, 其与故障线路段的保护装置 1连接,接收所述保护装置 1 的动作信号;
保护 2动作接点, 其与非故障线路段的保护装置 2连接, 接收所述保护装 置 2的动作信号;
1TWJ跳位监视接点, 其与所述故障线路段的断路器 DL1连接, 接收所述 断路器 DL1的跳位信号;
2TWJ跳位监视接点, 其与所述非故障线路段的断路器 DL2连接, 接收所 述断路器 DL2的跳位信号;
第一与门, 其与所述保护 1动作接点、 保护 2动作接点、 1TWJ跳位监视接 点、 2TWJ跳位监视接点连接, 用于在所述保护 1动作接点、 保护 2动作接点均 收到动作信号, 所述 1TWJ跳位监视接点、 2TWJ跳位监视接点均收到跳位信号 时输出高电平信号;
保护装置 2误动定位模块, 用于与所述第一与门的输出端连接, 在接收到 所述第一与门输出高电平时, 定位所述保护装置 2误动作;
第二与门, 其与所述保护 1动作接点、 保护 2动作接点、 1TWJ跳位监视接 点、 2TWJ跳位监视接点连接, 用于在所述保护 1动作接点未收到动作信号、 保 护 2动作接点收到动作信号, 所述 1TWJ跳位监视接点未收到跳位信号、 2TWJ 跳位监视接点收到跳位信号时输出高电平信号;
保护装置 2越级动作定位模块, 用于与所述第二与门的输出端连接, 在接 收到所述第二与门输出高电平时, 定位所述保护装置 2越级动作。
其中, 所述装置还包括:
第三与门, 其与所述保护装置 2误动定位模块的输出端, 以及所述保护 1 动作接点, 1TWJ跳位监视接点连接, 在所述保护装置 2误动定位模块输出高电 平, 所述保护 1动作接点收到动作信号, 所述 1TWJ跳位监视接点收到跳位信 号时, 输出高电平信号;
保护装置 2 隐性故障定位模块, 用于与所述第三与门的输出端连接, 在所 述第三与门输出高电平信号时, 定位所述保护装置 2 的元件及定值存在隐性故 障。
其中, 所述装置还包括:
保护 1电流采样回路接点,其与所述故障线路段的电流互感器二次绕阻 CT1 连接, 接收所述电流互感器二次绕阻 CT1的电流信号;
保护 1电压采样回路接点, 其与所述故障线路段的电压互感器 PT1连接, 接收所述电压互感器 PT1的电压信号。
其中, 所述装置还包括:
第四与门, 其与所述第二与门和所述保护 1 电流采样回路接点连接, 在所 述第二与门输出高电平和所述保护 1 电流采样回^^点输出表示保护装置 1的 电流故障量未得到正确采样时, 输出高电平;
保护装置 1的 CT回路隐性故障定位模块,用于与所述第四与门的输出端连 接, 在所述第四与门输出高电平时, 定位所述保护装置 1的 CT回路存在隐性故 障。
其中, 所述装置还包括:
第五与门, 其与所述保护装置 2越级动作定位模块的输出端, 以及所述保 护装置 1电压采样回路连接, 在所述保护装置 2越级动作定位模块输出高电平, 所述保护装置 1 电压采样回路接点输出表示保护装置 1 的电压故障量未得到正 确采样时, 输出高电平;
保护装置 1的 PT回路隐性故障定位模块,用于与所述第五与门的输出端连 接, 在所述第五与门输出高电平时, 定位所述保护装置 1的 PT回路存在隐性故 障。
其中, 所述装置还包括:
第六与门, 其与所述保护装置 2越级动作定位模块的输出端, 以及所述保 护 1 电流采样回路接点和所述保护 1 电压采样回路接点连接, 用于在所述保护 装置 2越级动作定位模块的输出端输出高电平, 以及所述保护 1 电流采样回路 接点输出表示保护装置 1 的电流故障量得到正确采样, 以及所述保护 1 电压采 样回路接点输出表示保护装置 1的电压故障量得到正确采样时, 输出高电平; 保护装置 1 隐性故障定位模块, 其与所述第六与门连接, 用于在所述第六 与门输出高电平时, 定位所述保护装置 1存在隐性故障。
其中, 所述装置还包括: 第七与门, 其与所述保护 1动作接点以及所述保护装置 2越级动作定位模 块的输出端连接, 用于在所述保护 1动作接点接收到保护 1动作接点收到动作 信号, 所述保护装置 2越级动作定位模块输出端输出高电平信号时, 输出高电 平信号;
DL1 断路器回路隐性故障定位模块, 其与所述第七与门连接, 用于在所述 第七与门输出高电平信号时, 定位所述故障线路段的 DL1断路器回路存在隐性 故障。
其中, 所述故障线路段为至少一条。
为了方便说明本技术方案,先采用变电站 llOkV单支路供电线路进行阐述, 如图 2所示:
其中, 图 2中的图形符号说明: DL1—― DL4为断路器; CT1—― 4为电路互 感器二次绕组; 保护 1 , 保护 2为 DL1、 DL2断路器对应的保护装置; d为故障 点; A、 B、 C N为变电站母线。 本实施例中, BC段 d点故障, 为故障线路 段, AB段为非故障线路段;
① BC段 d点故障, 正常情况下, 保护 1动作, 保护 2应该不动作; 但如果 保护 2存在隐性故障, 保护 1动作时, 保护 2可能也动作, 属于不正确动作, 也成为误动。
② BC段 d点故障, 正常情况下, 保护 1动作, 保护 2应该不动作; 但如果 保护 1存在隐性故障, 保护 1拒动, 保护 2动作, 原因 llOkV系统母线未断路 器失灵保护, 故保护 2动作, 虽然正确动作, 但属于越级跳闸, 也成为越级动 作。
上属两种情况存在的隐性故障, 采取如图 3 所示的电网继电保护隐性故障 远程监测定位装置进行跟踪定位。
其中, 图 3中的图形符号说明: 1TWJ为断路器 DL1跳位监视接点, 2TWJ 为断路器 DL2跳位监视接点。 保护 1动作, 保护 2动作分别为保护具备条件下 时保护 1和保护 2的动作接点。 保护 1 电流采样回路接点为连接到保护装置 1 的 CT上的接点,保护 1电压采样回路接点为连接到保护装置 1的 PT上的接点; 另, 图中的与门 &1为第一与门, 与门& 2为第二与门, 以此类推。
其中, 保护 1动作接点, 1TWJ动作接点, 保护 2动作接点, 2TWJ动作接 点, 保护 1 电流采样回路接点, 保护 1 电压采样回路接点等接点接收到的信号 均通过站端交换机开入到与门 &1〜与门& 7等组成的逻辑电路。
图 2所示中 BC段 d点故障(通过现有的故障监测或追踪技术可以获知母线 段何处发生故障), 图 3中的若保护 2、 保护 1均动作、 1TWJ、 2TWJ均动作, 此时若与门 &1动作(即输出高电平信号), 与门& 2不动作(输出低电平信号), 说明 llOkV单支路中的保护 2属于不正确动作(即误动); 同时保护 1、 1TWJ 均动作确认下与门& 3动作有输出高电平信号, 可以定位保护 2装置元件及定值 等存在隐性故障。
图 2所示中 BC段 d点故障, 图 3逻辑图中的若保护 2、 2TWJ均动作; 保 护 1、 1TWJ均未动作, 此时与门& 2动作输出高电平信号, 与门 &1不动作, 输 出低电平信号, 说明 llOkV单支路中的保护 2虽然正确动作, 但属于越级跳闸。 同时保护 1 的电流故障量未得到正确采样确认下与门& 4 动作有输出高电平信 号, 可以定位保护 1的 CT回路存在隐性故障。
图 2所示中 BC段 d点故障, 图 3逻辑图中的若保护 2、 2TWJ均动作; 保 护 1、 1TWJ均未动作, 此时与门& 2动作输出高电平信号, 与门 &1不动作输出 低电平信号, 说明 llOkV单支路中的保护 2虽然正确动作, 但属于越级跳闸。 同时保护 1 的电压故障量未得到正确采样确认下与门& 5 动作有输出高电平信 号, 可以定位保护 1的 PT回路存在隐性故障。
图 2所示中 BC段 d点故障, 图 3逻辑图中的若保护 2、 2TWJ均动作; 保 护 1、 1TWJ均未动作, 此时与门& 2动作输出高电平信号, 与门 &1不动作输出 低电平信号, 说明 llOkV单支路中的保护 2虽然正确动作, 但属于越级跳闸。 同时保护 1的电流电压故障量得到正确采样确认下与门& 6动作有输出高电平信 号, 可以定位保护 1的装置存在隐性故障。
图 2所示中 BC段 d点故障, 图 3逻辑图中的若保护 2、 2TWJ均动作; 保 护 1、 1TWJ均未动作, 此时与门& 2动作输出高电平信号, 与门 &1不动作输出 低电平信号, 说明 llOkV单支路中的保护 2虽然正确动作, 但属于越级跳闸。 同时保护 1动作确认下与门& 7动作有输出高电平信号,可以定位 DL1的断路器 机构存在隐性故障。
本发明也适用于变电站多支路串联供电线路情况(有 n条 llOkV支路), 如 图 4所示。
其中, 图 4中的图形符号说明为: DL1 DLn为断路器; CTl-n为电路互 感器二次绕组; d为第 n支路上的故障点; A、 B、 C N、 N+l为变电站母线; 保护 n为 DLn断路器对应的保护装置。 本实施例中, BC, BN段 d点故障, 为故障线路段, AB段为非故障线路段。
变电站多支路串联供电线路采取如图 5 所示的电网继电保护隐性故障远程 监测定位装置进行跟踪定位。
其中, 图 5中的图形符号说明: 1TWJ〜! lTWJ分别为断路器 DLl〜DLn跳位 监视接点, 2TWJ为断路器 DL2跳位监视接点。 保护 1-n动作, 保护 2动作, 保 护 n-7动作分别为保护具备条件下时保护 1〜保护 n和保护 2的动作接点。 保护 1-n电流采样回路接点为连接到保护装置 1〜! 1的 CT上的接点, 保护 1〜!!电压采 样回^^点为连接到保护装置 l〜n的 PT上的接点; 另, 图中的与门 &1为第一 与门, 与门& 2为第二与门, 以此类推。 另 > 1为或门 1 , > 2为或门 > 2, —次 类推。
其中, 保护 1〜!!动作接点, 1〜! lTWJ动作接点, 保护 2动作接点, 2TWJ动 作接点, 保护 1〜!!电流采样回路接点, 保护 1〜!!电压采样回路接点等接点接收 到的信号均通过站端交换机开入到与门 &1!〜 1〜与门 &1!〜 7, 或门 > 1〜7 等组成的 逻辑电路。
图 4所示中 BN段 d点故障,图 5逻辑图中的若保护 2、保护 n均动作、 nTWJ、 2TWJ均动作, 此时与门 &n-l动作, 与门 &n-2不动作, 说明 llOkV单支路中的 保护 2属于不正确动作 (误动); 同时保护 n、 nTWJ均动作确认下与门 &n-3动 作有输出高电平, 或门 > 1有输出高电平, 可以定位保护 2装置元件及定值等存 在隐性故障。
图 4所示中 BN段 d点故障, 图 5逻辑图中的若保护 2、 2TWJ均动作; 保 护 n、 nTWJ均未动作, 此时与门 &n-2动作输出高电平, 与门 &n-l不动作输出 低电平, 说明 11 OkV单支路中的保护 2虽然正确动作, 但属于越级跳闸。 同时 保护 n的电流故障量未得到正确采样确认下与门 &n-4动作有输出高电平, 或门 > 2有输出高电平, 可以定位保护 11的01回路存在隐性故障, 其中 n≠2。
图 4所示中 BN段 d点故障, 图 8逻辑图中的若保护 2、 2TWJ均动作; 保 护 n、 nTWJ均未动作, 此时与门 &n-2动作输出高电平, 与门 &n-l不动作输出 低电平, 说明 llOkV单支路中的保护 2虽然正确动作, 但属于越级跳闸。 同时 保护 n的电压故障量未得到正确采样确认下与门 &n-5动作有输出高电平, 或门 > 3有输出高电平, 可以定位保护 n的 PT回路存在隐性故障, 其中 η≠2。
图 4所示中 ΒΝ段 d点故障, 图 5逻辑图中的若保护 2、 2TWJ均动作; 保 护 n、 nTWJ均未动作, 此时与门 &n-2动作输出高电平, 此时与门 &n-l不动作 输出低电平, 说明 l lOkV单支路中的保护 2虽然正确动作, 但属于越级跳闸。 同时保护 n 的电流电压故障量得到正确采样确认下与门 &n-6 动作有输出高电 平, 或门 > 4有输出高电平, 可以定位保护 n的装置存在隐性故障, 其中 n≠2。
图 4所示中 BN段 d点故障, 图 5逻辑图中的若保护 2、 2TWJ均动作; 保 护 n、 nTWJ均未动作, 此时与门 &n-2动作输出高电平, 与门 &n-l不动作的输 出低电平, 说明 l lOkV单支路中的保护 2虽然正确动作, 但属于越级跳闸。 同 时保护 n动作确认下与门 &n-7动作有输出高电平, 或门 > 5有输出高电平, 可 以定位 DLn的断路器机构存在隐性故障, 其中 n≠2。
实施本发明, 可以及时有效的检查出电网继电保护隐性故障, 避免电网重 大事故, 保证电网安全稳定运行。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程, 是可以通过计算机程序来指令相关的硬件来完成, 所述的程序可存储于一计算 机可读取存储介质中, 该程序在执行时, 可包括如上述各方法的实施例的流程。 其中, 所述的存储介质可为磁碟、 光盘、 只读存储记忆体(Read-Only Memory, ROM )或随机存储记忆体(Random Access Memory, RAM )等。 能认定本发明的具体实施只局限于这些说明。 对于本发明所属技术领域的普通 技术人员来说, 在不脱离本发明构思的前提下, 还可以做出若干简单推演或替 换, 都应当视为属于本发明的保护范围。

Claims

权 利 要 求
1、一种电网继电保护隐性故障远程监测定位装置, 其特征在于, 包括: 保护 1动作接点, 其与故障线路段的保护装置 1连接, 接收所述保护装 置 1的动作信号;
保护 2动作接点, 其与非故障线路段的保护装置 2连接, 接收所述保护 装置 2的动作信号;
1TWJ跳位监视接点, 其与所述故障线路段的断路器 DL1连接, 接收所 述断路器 DL1的跳位信号;
2TWJ跳位监视接点, 其与所述非故障线路段的断路器 DL2连接, 接收 所述断路器 DL2的跳位信号;
第一与门, 其与所述保护 1动作接点、 保护 2动作接点、 1TWJ跳位监 视接点、 2TWJ跳位监视接点连接, 用于在所述保护 1动作接点、 保护 2动 作接点均收到动作信号, 所述 1TWJ跳位监视接点、 2TWJ跳位监视接点均 收到跳位信号时输出高电平信号;
保护装置 2误动定位模块, 用于与所述第一与门的输出端连接, 在接收 到所述第一与门输出高电平时, 定位所述保护装置 2误动作;
第二与门, 其与所述保护 1动作接点、 保护 2动作接点、 1TWJ跳位监 视接点、 2TWJ跳位监视接点连接, 用于在所述保护 1动作接点未收到动作 信号、 保护 2动作接点收到动作信号, 所述 1TWJ跳位监视接点未收到跳位 信号、 2TWJ跳位监视接点收到跳位信号时输出高电平信号;
保护装置 2越级动作定位模块, 用于与所述第二与门的输出端连接, 在 接收到所述第二与门输出高电平时, 定位所述保护装置 2越级动作。
2、 如权利要求 1 所述的电网继电保护隐性故障远程监测定位装置, 其 特征在于, 所述装置还包括:
第三与门, 其与所述保护装置 2误动定位模块的输出端, 以及所述保护 1动作接点, 1TWJ跳位监视接点连接, 在所述保护装置 2误动定位模块输 出高电平, 所述保护 1动作接点收到动作信号, 所述 1TWJ跳位监视接点收 到跳位信号时, 输出高电平信号; 保护装置 2隐性故障定位模块, 用于与所述第三与门的输出端连接, 在 所述第三与门输出高电平信号时, 定位所述保护装置 2的元件及定值存在隐 性故障。
3、 如权利要求 2所述的电网继电保护隐性故障远程监测定位装置, 其 特征在于, 所述装置还包括:
保护 1电流采样回路接点, 其与所述故障线路段的电流互感器二次绕阻 CT1连接, 接收所述电流互感器二次绕阻 CT1的电流信号;
保护 1电压采样回路接点,其与所述故障线路段的电压互感器 PT1连接, 接收所述电压互感器 PT1的电压信号。
4、 如权利要求 3 所述的电网继电保护隐性故障远程监测定位装置, 其 特征在于, 所述装置还包括:
第四与门, 其与所述第二与门和所述保护 1电流采样回路接点连接, 在 所述第二与门输出高电平和所述保护 1电流采样回^ ί妻点输出表示保护装置 1的电流故障量未得到正确采样时, 输出高电平;
保护装置 1的 CT回路隐性故障定位模块, 用于与所述第四与门的输出 端连接, 在所述第四与门输出高电平时, 定位所述保护装置 1的 CT回路存 在隐性故障。
5、 如权利要求 4所述的电网继电保护隐性故障远程监测定位装置, 其 特征在于, 所述装置还包括:
第五与门, 其与所述保护装置 2越级动作定位模块的输出端, 以及所述 保护装置 1电压采样回路连接, 在所述保护装置 2越级动作定位模块输出高 电平, 所述保护装置 1电压采样回路接点输出表示保护装置 1的电压故障量 未得到正确采样时, 输出高电平;
保护装置 1的 ΡΤ回路隐性故障定位模块, 用于与所述第五与门的输出 端连接, 在所述第五与门输出高电平时, 定位所述保护装置 1的 ΡΤ回路存 在隐性故障。
6、 如权利要求 5 所述的电网继电保护隐性故障远程监测定位装置, 其 特征在于, 所述装置还包括:
第六与门, 其与所述保护装置 2越级动作定位模块的输出端, 以及所述 保护 1电流采样回路接点和所述保护 1电压采样回路接点连接, 用于在所述 保护装置 2越级动作定位模块的输出端输出高电平, 以及所述保护 1电流采 样回路接点输出表示保护装置 1的电流故障量得到正确采样, 以及所述保护
1电压采样回路接点输出表示保护装置 1的电压故障量得到正确采样时, 输 出高电平;
保护装置 1隐性故障定位模块, 其与所述第六与门连接, 用于在所述第 六与门输出高电平时, 定位所述保护装置 1存在隐性故障。
7、 如权利要求 6所述的电网继电保护隐性故障远程监测定位装置, 其 特征在于, 所述装置还包括:
第七与门, 其与所述保护 1动作接点以及所述保护装置 2越级动作定位 模块的输出端连接, 用于在所述保护 1动作接点接收到保护 1动作接点收到 动作信号, 所述保护装置 2越级动作定位模块输出端输出高电平信号时, 输 出高电平信号;
DL1断路器回路隐性故障定位模块, 其与所述第七与门连接, 用于在所 述第七与门输出高电平信号时,定位所述故障线路段的 DL1断路器回路存在 隐性故障。
8、 如权利要求 7所述的电网继电保护隐性故障远程监测定位装置, 其 特征在于, 所述故障线路段为至少一条。
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CN105527541A (zh) * 2016-01-18 2016-04-27 泰豪软件股份有限公司 一种判定配电线路故障跳闸的方法
CN105527541B (zh) * 2016-01-18 2018-10-26 泰豪软件股份有限公司 一种判定配电线路故障跳闸的方法
CN111475122A (zh) * 2020-05-12 2020-07-31 国网山东省电力公司电力科学研究院 一种继电保护动作报文远程打印系统及方法
CN111475122B (zh) * 2020-05-12 2022-04-19 国网山东省电力公司电力科学研究院 一种继电保护动作报文远程打印系统及方法

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