An immediate monitoring system for non-electrical quantity protection of transformers

Abstract

The present invention discloses an immediate monitoring system for non-electrical quantity protection of a transformer, which relates to the technical field of partial electrical quantity protection of transformers and includes: a non-electrical quantity protection unit, a first control unit, a second control unit, a first monitoring unit, a second monitoring unit, a signal generating unit, and a blocking unit. The control of the transformer is determined by the full triggering of the first control unit, the second control unit, and the first monitoring unit, avoiding the occurrence of false triggering in the non-electrical quantity protection device. At the same time, in order to avoid the contingency of the detected non-electrical quantity signals, a second monitoring unit is specially set to further detect the non-electrical quantity factors in the transformer, ensuring the authenticity of the previously measured non-electrical quantity signals, thereby accurately judging the fault signals sent by the transformer and timely issuing corresponding blocking actions. Thus, the problem that the non-electrical quantity protection device cannot accurately issue fault signals and corresponding blocking actions for the transformer due to external condition interference is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of transformer differential protection, and particularly relates to an immediate monitoring system for transformer non-electrical protection. Background Art

[0002] Non-electrical protection refers to a protection measure that reflects the faults of corresponding equipment through non-electrical quantities and issues alarm signals or cuts off the circuit. The basis for judging equipment faults is often not electrical quantities such as current, voltage, frequency, and impedance, but non-electrical quantities such as temperature, pressure, speed, or gas (oil speed).

[0003] Non-electrical protection is now widely used in the power industry. For example, for the protection of transformer equipment, non-electrical protection devices are usually set up to protect the transformer. The most commonly used protection device on the transformer is the gas relay. When a fault occurs inside the transformer, oil gas and oil flow trigger the light gas action and heavy gas action of the gas relay respectively, thereby protecting the transformer.

[0004] Usually, transformers are often installed outdoors, and the non-electrical protection devices on them, such as gas relays, are also usually installed outdoors. In case of bad weather such as strong winds and heavy rains, the gas relay often malfunctions. In the prior art, shielding devices are often used to shield the gas relay, but the effect is generally average. In addition, since pressure, temperature, and speed in non-electrical protection are not electrical quantities, they are easily affected by the outside world. For example, the temperature in summer and winter affects the temperature, and strong winds affect the pressure. This will cause certain interference to the non-electrical protection when judging the state of the transformer, resulting in certain errors in the non-electrical protection device and unable to accurately issue fault signals and corresponding blocking actions for the transformer. Summary of the Invention

[0005] The purpose of the present invention is to provide an immediate monitoring system for transformer non-electrical protection to solve the problem that the non-electrical protection device is affected by external conditions and cannot accurately issue fault signals and corresponding blocking actions for the transformer.

[0006] To achieve the above purpose, the present invention provides an immediate monitoring system for transformer non-electrical protection, including:

[0007] A non-electrical protection unit, which is used to detect the non-electrical parameters of the transformer and preprocess the detected non-electrical parameters;

[0008] A first control unit, which is used to preliminarily analyze the preprocessed non-electrical parameters transmitted by the non-electrical protection unit and issue a first indication signal according to the preliminary analysis result;

[0009] A second control unit, which is used to judge whether the pre - processed non - electrical parameters transmitted by the non - electrical protection unit are in an abnormal state. When there is an abnormal state, it issues a re - check signal and can receive the feedback signal of the re - check and output a second indication signal;

[0010] A second monitoring unit, which is used to re - check the non - electrical parameters of the transformer according to the re - check signal and feed back the re - check result to the second control unit;

[0011] A first monitoring unit, which is used to monitor the operation state of the non - electrical protection unit and issue a third indication signal according to the operation state;

[0012] A signal generating unit, which judges whether to issue an alarm message according to the first indication signal, the second indication signal and the third indication signal; and

[0013] A blocking unit, which controls the current flow of the transformer according to the alarm to protect the transformer.

[0014] Preferably, the non - electrical parameters of the transformer detected by the non - electrical protection unit include: the pressure inside the transformer, the temperature of the transformer oil tank, the flow rate of the inflowing transformer oil, and the state of the gas relay.

[0015] Preferably, the non - electrical protection unit includes:

[0016] An acquisition module, which is used to acquire the non - electrical parameters of the transformer;

[0017] A first analysis module, which is used to pre - process the non - electrical parameters of the transformer; and

[0018] An execution module, which is used to transmit the pre - processed non - electrical parameters.

[0019] Preferably, the acquisition module includes:

[0020] A gas relay, which is communicated with the oil cavity pipeline of the transformer;

[0021] A detection cavity, which is arranged on the oil cavity pipeline where the gas relay is communicated with the transformer;

[0022] A first pressure sensor, which is arranged in the detection cavity;

[0023] A first temperature sensor, which is arranged on the pipeline where the gas relay is communicated with the transformer; and

[0024] A flowmeter, which is arranged on the pipeline connecting the gas relay and the transformer.

[0025] Preferably, the first control unit includes:

[0026] A first signal receiving module, which is used for receiving and transmitting the pre - processed non - electrical parameters sent by the non - electrical protection unit;

[0027] A second analysis module, which is used for preliminarily analyzing the non - electrical parameters transmitted by the first signal receiving module; and

[0028] A first normally open contact, which is electrically connected to the second analysis module. The second analysis module controls the opening and closing of the first normally open contact according to the result of the preliminary analysis, and the opening and closing signal of the first normally open contact is the first indication signal.

[0029] Preferably, the second control unit includes:

[0030] A second signal receiving module, which is used for receiving and transmitting the pre - processed non - electrical parameters transmitted by the non - electrical protection unit;

[0031] A third analysis module, which judges the abnormal state according to the data transmitted by the second signal receiving module. When there is an abnormal state, it issues a re - check signal, analyzes according to the re - check feedback data, and feeds back the analysis result to the feedback signal module;

[0032] A feedback signal module, which controls the corresponding unit to conduct a re - check according to the re - check information, transmits the re - checked data to the third analysis module, and receives the feedback signal module at the same time; and

[0033] A second normally open contact, which is electrically connected to the third analysis module. The third analysis module controls the opening and closing of the second normally open contact according to the feedback signal, and the opening and closing state of the second normally open contact is the second indication signal.

[0034] Preferably, the second monitoring unit includes:

[0035] A second temperature sensor, which is arranged on the inner wall of the oil chamber of the transformer;

[0036] A second pressure sensor, which is arranged on the inner wall of the oil chamber of the transformer; and

[0037] A transmission module, which is used to receive the review signal sent by the feedback signal module and feed back the data detected by the second temperature sensor and the second pressure sensor to the feedback signal module.

[0038] Preferably, the first monitoring unit includes: a fourth analysis module, a normally open contact of a temperature sensor, a normally open contact of a pressure sensor, a normally open contact of a flowmeter, a normally open contact of a gas relay, and a third normally open contact. The normally open contact of the pressure sensor and the normally open contact of the temperature sensor are connected in parallel to form an L1 circuit; the normally open contact of the gas relay and the normally open contact of the flowmeter are connected in parallel to form an L2 circuit, and the L1 circuit and the L2 circuit are connected in parallel to form an L3 circuit; one end of the L3 circuit is electrically connected to the non-electric quantity protection unit, and the other end is electrically connected to the fourth analysis module. The fourth analysis module is connected to the third normally open contact, and the opening and closing state of the third normally open contact is a third indication signal.

[0039] Preferably, the current change range corresponding to the first temperature sensor is set to 6A - 10A;

[0040] The current change range corresponding to the first pressure sensor is set to 0.6A - 1A;

[0041] The actions of the flowmeter and the gas relay are set to two states: high level and low level.

[0042] Compared with the existing technology, the present invention has the following beneficial effects:

[0043] The non-electric quantity protection real-time monitoring system for transformers provided by the present invention detects the non-electric quantity parameters of the transformer through the non-electric quantity protection unit and preprocesses the detected non-electric quantity parameters; the first control unit preliminarily analyzes the preprocessed non-electric quantity parameters transmitted by the non-electric quantity protection unit and issues a first indication signal according to the preliminary analysis result; the second control unit is used to judge whether the preprocessed non-electric quantity parameters transmitted by the non-electric quantity protection unit are in an abnormal state. When there is an abnormal state, a review signal is issued. The second monitoring performs a review according to the review signal and returns the detected data through feedback. The second control unit receives the feedback signal and outputs a second indication signal; the first monitoring unit is used to monitor the action state of the non-electric quantity protection unit and issue a third indication signal according to the action state; the signal generating unit judges whether to issue an alarm message according to the first indication signal, the second indication signal, and the third indication signal; the blocking unit controls the current flow of the transformer according to the alarm, thereby protecting the transformer.

[0044] The present invention determines whether the transformer needs to be powered off through the joint judgment of the first control unit, the second control unit, and the first monitoring unit to avoid further expansion of accidents. Moreover, the control of the transformer is determined through the full triggering of the first control unit, the second control unit, and the first monitoring unit, avoiding the occurrence of false triggering in the non-electric quantity protection device. At the same time, in order to avoid the contingency of the detected non-electric quantity signal, a second monitoring unit is specially set to further detect the non-electric quantity factors in the transformer to ensure the authenticity of the previously measured non-electric quantity signal, thereby accurately judging the fault signal sent by the transformer and sending a corresponding blocking action in a timely manner. Thus, the problem that the non-electric quantity protection device cannot accurately send a fault signal and a corresponding blocking action for the transformer due to external conditions interference is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions of the present invention, the accompanying drawings required for the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only one embodiment of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0046] Figure 1 is a schematic structural diagram of a non-electric quantity protection instant monitoring system of a transformer in one embodiment of the present invention;

[0047] Figure 2 is a schematic structural diagram of a non-electric quantity protection instant monitoring system of a transformer in one embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0048] The technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0049] Figure 1 One embodiment of the non-electric quantity protection instant monitoring system provided by the present invention is shown, including: a non-electric quantity protection unit, a first control unit, a second control unit, a second monitoring unit, a first monitoring unit, a signal generating unit, and a blocking unit.

[0050] The non-electric quantity protection unit is arranged inside the transformer. The non-electric quantity protection unit is used to detect the non-electric quantity parameters of the transformer and preprocess the detected non-electric quantity parameters.

[0051] The first control unit is connected to the non-electricity protection unit. The first control unit is used to preliminarily analyze the pre-processed non-electricity parameters transmitted by the non-electricity protection unit, and issue a first indication signal according to the preliminary analysis result;

[0052] The second control unit is respectively connected to the non-electricity protection unit and the first control unit. The second control unit is used to judge whether the pre-processed non-electricity parameters transmitted by the non-electricity protection unit are in an abnormal state. When there is an abnormal state, it issues a recheck signal and can receive a feedback signal to output a second indication signal;

[0053] The second monitoring unit is arranged on the transformer and is connected to the second control unit. The second monitoring unit is used to recheck the non-electricity parameters of the transformer according to the recheck signal, and feed back the recheck result to the second control unit;

[0054] The first monitoring unit is respectively connected to the non-electricity protection unit, the second control unit and the first control unit. The first monitoring unit is used to monitor the action state of the non-electricity protection unit and issue a third indication signal according to the action state;

[0055] The signal generating unit judges whether to issue an alarm message according to the first indication signal, the second indication signal and the third indication signal; specifically, the signal sending unit is respectively connected to the first control unit, the second control unit and the first monitoring unit. The signal sending unit, the first control unit, the second control unit and the first monitoring unit form a loop. If any one of the first control unit, the second control unit and the first monitoring unit cannot be connected, the loop will not be able to be connected to perform corresponding actions, that is, when this loop is connected and it is confirmed that the transformer state is abnormal, an alarm message will be issued;

[0056] The blocking unit cuts off the current flow of the electric switch of the transformer. The blocking unit controls the current flow of the transformer according to the alarm, that is, it is blocked by controlling the closing of the electric switch, so as to protect the transformer.

[0057] The above-mentioned transformer non-electrical quantity protection real-time monitoring system detects the non-electrical quantity parameters of the transformer through the non-electrical quantity protection unit and preprocesses the detected non-electrical quantity parameters; the first control unit preliminarily analyzes the preprocessed non-electrical quantity parameters transmitted by the non-electrical quantity protection unit and issues a first indication signal according to the preliminary analysis result; the second control unit is used to judge whether the preprocessed non-electrical quantity parameters transmitted by the non-electrical quantity protection unit are in an abnormal state. When there is an abnormal state, a recheck signal is issued. The second monitor rechecks according to the recheck signal and returns the detected data through a feedback signal. The second control unit receives the feedback signal and outputs a second indication signal; the first monitoring unit is used to monitor the action state of the non-electrical quantity protection unit and issues a third indication signal according to the action state; the signal generating unit judges whether to issue an alarm message according to the first indication signal, the second indication signal and the third indication signal; the blocking unit controls the current flow of the transformer according to the alarm, so as to protect the transformer.

[0058] Specifically, Figure 2 Fig. shows one embodiment of the transformer non-electrical quantity protection real-time monitoring system provided by the present invention. Among them, the non-electrical quantity parameters of the transformer detected by the non-electrical quantity protection unit include: the pressure inside the transformer, the temperature of the transformer oil tank, the flow rate of the transformer oil inflow, and the state of the gas relay.

[0059] The non-electrical quantity protection unit includes: a collection module, a first analysis module, and an execution module.

[0060] The collection module is used to collect the non-electrical quantity parameters of the transformer.

[0061] The first analysis module is used to preprocess the non-electrical quantity parameters of the transformer.

[0062] The execution module is used to transmit the preprocessed non-electrical quantity parameters.

[0063] Among them, the collection module is an important module for monitoring the non-electrical quantity state of the transformer. After the non-electrical quantity state on the transformer changes, it will be collected by the collection module in the form of an electrical signal. In this embodiment, a current signal is preferably used to transmit the collected signal.

[0064] Therefore, the collection module includes: a gas relay, a detection chamber, a first pressure sensor, a first temperature sensor, and a flow meter.

[0065] The gas relay is connected to the pipeline of the transformer oil chamber inside the transformer, that is, the gas relay is installed in the pipeline between the conservator and the oil tank of the transformer. When the gas relay collects the signal of whether the heavy gas acts, only two states can be collected, namely the action signal and the non-action signal. Therefore, the gas relay uses the high and low level method to collect the action of the heavy gas. The heavy gas action is high level, and the heavy gas is normal, that is, the non-action is low level; the light gas action is the same.

[0066] The detection chamber is arranged on the pipeline connecting the gas relay and the transformer. The detection chamber is an external cavity, and the detection chamber is connected to the pipeline of the transformer oil chamber inside the transformer.

[0067] The first pressure sensor is arranged in the detection chamber; when a fault occurs inside the transformer, oil and gas are generated, and the oil and gas surges into the pipeline, causing the internal pressure of the pipeline to increase. The first pressure sensor will monitor the pressure change in real time, and the corresponding acquisition module will acquire the current value corresponding to the pressure change.

[0068] The first temperature sensor is arranged on the pipeline connecting the gas relay and the transformer; when a fault occurs inside the transformer, the transformer oil generates oil and gas under the action of the electric arc, and the temperature in the transformer oil chamber, the detection chamber and the corresponding pipeline increases. The first temperature sensor can monitor the temperature change in real time, and the corresponding acquisition module will acquire the current value corresponding to the pressure change.

[0069] The flowmeter is an electromagnetic flowmeter, and the flowmeter is arranged on the pipeline connecting the gas relay and the transformer; when the heavy gas acts, the transformer oil surges into the pipeline connected to the gas relay, and the electromagnetic flowmeter can monitor the size of the flow in real time.

[0070] It should be noted that the action signals generated by the heavy gas action, the light gas action (gas relay) and the electromagnetic flowmeter are all collected by the acquisition module through high and low levels.

[0071] The corresponding first analysis module preliminarily analyzes the data collected by the acquisition module. For the current values collected by the first temperature sensor and the first pressure sensor, the first analysis module will send them to the execution unit one by one; for the signals collected by the gas relay and the signals collected by the electromagnetic flowmeter, only the high level signal and the low level signal are sent to the execution module. After receiving the signal from the first analysis module, the execution module will send the signal unchanged to the first signal receiving module.

[0072] Continue to refer to Figure 2 , the first control unit includes: a first signal receiving module, a second analysis module and a first normally open contact,

[0073] Among them, the first signal receiving module is used to receive the preprocessed non-electric quantity parameters sent by the non-electric quantity protection unit (execution module), and then transmit them to the second analysis module;

[0074] The second analysis module is used to preliminarily analyze the non-electric quantity parameters transmitted by the first signal receiving module; in computer language, the analysis of a signal is essentially a comparison of the actual value with a preset standard value. When within the range specified by the standard value, a normal conclusion is analyzed. When exceeding the specified range, an abnormal conclusion is analyzed. It should be noted that only in the second analysis module, if there is an abnormal transmitted signal, it is determined as an abnormal state, which is the result of the preliminary analysis;

[0075] Specifically, the first normally open contact is electrically connected to the second analysis module. The second analysis module controls the opening and closing of the first normally open contact according to the result of the preliminary analysis, that is, when the analysis result is abnormal, the first normally open contact is energized and closed, otherwise it is open. The opening and closing signal of the first normally open contact is the first indication signal.

[0076] The above-mentioned first control unit mainly processes and preliminarily analyzes the signals collected by the non-electric quantity protection participation to determine whether to trigger the signal sending unit to perform the next action, that is, whether to transmit an action signal to the signal sending unit.

[0077] Further referring to Figure 2 the second control unit includes: a second signal receiving module, a third analysis module, a feedback signal module, and a second normally open contact.

[0078] Among them, the second signal receiving module is signal-connected to the execution module. The second signal receiving module simultaneously receives the preprocessed non-electric quantity parameters transmitted by the non-electric quantity protection unit (execution module signal), and transmits them to the third analysis module.

[0079] The third analysis module judges the abnormal state according to the data transmitted by the second signal receiving module. When there is an abnormal state, it issues a recheck signal, analyzes according to the recheck feedback data, and feeds back the analysis result to the feedback signal module. There are two analysis results of the non-electric quantity signal by the third analysis module. Among them, there is only one execution action issued, that is, when the non-electric quantity signal is abnormal, an execution action signal is sent to the second normally open contact, that is, the second normally open contact is closed; when the non-electric quantity signal is normal, no signal is sent.

[0080] The feedback signal module controls the corresponding unit to conduct a recheck according to the recheck information, transmits the data of the recheck to the third analysis module, and simultaneously receives the signal finally fed back by the third analysis module; specifically, when the feedback signal module receives the recheck information, it sends an execution action signal to the second monitoring unit, and then the feedback signal sent by the second monitoring unit (i.e., re-obtains the non-electrical parameters of the transformer). The received feedback signal will pass through the third analysis module. If the third analysis module analyzes the feedback signal as a normal state, the feedback signal fails and will no longer be transmitted as a transmission signal; if the analysis result of the feedback signal is consistent with the analysis result on the execution module, that is, an abnormal state is fed back to the feedback module, then the feedback signal module controls the second normally open contact to be energized and closed.

[0081] The second normally open contact is electrically connected to the third analysis module. The third analysis module controls the opening and closing of the second normally open contact according to the feedback signal, and the opening and closing state of the second normally open contact is the second indication signal.

[0082] Among them, the data monitored by the second monitoring unit are the temperature and pressure in the transformer oil chamber; correspondingly, the second monitoring unit includes: a second temperature sensor, a second pressure sensor, and a transmission module.

[0083] The second temperature sensor is arranged on the inner wall of the oil chamber of the transformer. Specifically, the second temperature sensor is arranged on the inner wall of the oil chamber of the transformer near the top or at the top.

[0084] The second pressure sensor is arranged on the inner wall of the oil chamber of the transformer. Specifically, the second pressure sensor is arranged on the inner wall of the oil chamber of the transformer near the bottom or at the bottom.

[0085] The transmission module is used to receive the recheck signal sent by the feedback signal module and feed back the data detected by the second temperature sensor and the second pressure sensor to the feedback signal module.

[0086] The second temperature sensor and the second pressure sensor are essentially the devices for sending feedback signals. When the third analysis module in the second control unit receives the signal in the execution module and analyzes it as abnormal, the third analysis module will analyze the feedback signals detected by the second pressure sensor and the second temperature sensor. If the analysis result is consistent with the signal analysis result in the execution module, that is, both are abnormal, then the second normally open contact is energized and closed.

[0087] For further reference Figure 2, the first monitoring unit includes: a fourth analysis module, normally open contacts of a temperature sensor, normally open contacts of a pressure sensor, normally open contacts of a flowmeter, normally open contacts of a gas relay, and a third normally open contact. The normally open contacts of the pressure sensor and the normally open contacts of the temperature sensor are connected in parallel to form an L1 circuit; the normally open contacts of the gas relay and the normally open contacts of the flowmeter are connected in parallel to form an L2 circuit, and the L1 circuit and the L2 circuit are connected in parallel to form an L3 circuit; one end of the L3 circuit is electrically connected to the non-electric quantity protection unit (execution module), and the other end is electrically connected to the fourth analysis module. The fourth analysis module is connected to the third normally open contact, and the opening and closing state of the third normally open contact is a third indication signal;

[0088] Specifically, one end of the normally open contacts of the temperature sensor is also electrically connected to the output end of the first temperature sensor, the normally open contacts of the pressure sensor are also electrically connected to the output end of the first pressure sensor, the normally open contacts of the flowmeter are also electrically connected to the output end of the flowmeter, the normally open contacts of the gas relay are also electrically connected to the output end of the gas relay, and the fourth analysis module is respectively connected to the L1 circuit and the L2 circuit.

[0089] Specifically, the normally open contacts of the temperature sensor, the normally open contacts of the pressure sensor, the normally open contacts of the flowmeter, and the normally open contacts of the gas relay are opened and closed according to the data transmitted by the non-circuit protection unit, that is, whether there is data transmission from the first pressure sensor, the first temperature sensor, the flowmeter, and the gas relay causes the normally open contacts of the temperature sensor, the normally open contacts of the pressure sensor, the normally open contacts of the flowmeter, and the normally open contacts of the gas relay to open or close. The fourth control module controls the opening and closing state of the third contact according to the closing states of the three circuits (which can be set according to the flowing current or voltage, etc.), that is, when the contacts of any branch in the three circuits are closed, the third normally open contact is also closed.

[0090] The reason for connecting the normally open contacts of the temperature sensor and the normally open contacts of the pressure sensor in parallel first and then connecting them in parallel with the circuit formed by connecting the normally open contacts of the flowmeter and the normally open contacts of the gas relay in parallel is that the signal types collected by the first temperature sensor and the second temperature sensor are different from the signal types collected by the electromagnetic flowmeter and the gas relay.

[0091] Since both the first temperature sensor and the first pressure sensor collect current signals, if there is a problem with one of them, it is impossible to specifically determine whether the data in the first temperature sensor is abnormal or the data in the first pressure sensor is abnormal. Therefore, in this embodiment, the first control unit and / or the second unit are specifically set so that the corresponding current change range of the first temperature sensor is 6A - 10A; the corresponding current change range of the pressure sensor is 0.6A - 1A; when the detected current signal changes with a single-digit floating, it can be concluded that the data detected by the first temperature sensor is abnormal; when the detected current signal changes with a tenth-digit floating, it can be concluded that the data detected by the first pressure sensor is abnormal. It should be noted that because of the setting of the two parallel circuits in the L1 circuit, this special setting does not have a substantial impact on the entire technical solution. Only when facing a transformer fault, the operator can understand which sensor's collected data is abnormal and thus triggers an action.

[0092] Further referring to Figure 2 , the signal generating unit includes an alarm component, and the alarm component is arranged on the loop where the signal generating unit is located.

[0093] Specifically, the signal sending unit is respectively connected to the first control unit, the second control unit, and the first monitoring unit. The signal sending unit, the first control unit, the second control unit, and the first monitoring unit form a loop, and an alarm component is arranged on this loop. If any one of the first control unit, the second control unit, and the first monitoring unit cannot be connected, this loop will not be able to connect for corresponding actions. That is, when this loop is connected and it is confirmed that the transformer state is abnormal, that is, when the first normally open contact, the second normally open contact, and the third normally open contact are all closed, the loop where the signal generating unit is located is connected, and the alarm component sends out an alarm message.

[0094] The blocking unit includes a fifth analysis module; the fifth analysis module is respectively connected to the signal sending unit and the signal port of the transformer main switch. According to the alarm signal after the alarm component, the fifth analysis module will send a control power-off signal to the transformer main switch, and then control the transformer to power off to avoid further expansion of the accident.

[0095] The working principle of the non-electric quantity protection instant monitoring system of the transformer of the present invention will be described in detail so that those skilled in the art can better understand the present invention:

[0096] The data collected by the first pressure sensor, the first temperature sensor, the flow meter, and the gas relay in the acquisition module of the non-electric quantity protection unit are classified by the first analysis module in the non-electric quantity protection unit, and are transmitted to the first signal receiving module of the first control unit, the second receiving module of the second control unit, and the first monitoring unit through the execution module in the non-electric quantity protection unit;

[0097] The first signal receiving module transmits the non - electrical quantity parameters transmitted by the execution module to the second analysis module of the first control unit. The second analysis module determines whether the received non - electrical quantity parameters exceed the set range. When they exceed, it indicates an abnormality, and controls the first normally open contact in the first control unit to close; otherwise, it does not close.

[0098] The second signal receiving module of the second control unit receives the non - electrical quantity parameters transmitted by the execution module and transmits them to the third analysis module of the second control unit. The third analysis module judges the abnormal state of the non - electrical quantity parameters. When there is an abnormal state, it issues a re - check signal to the feedback signal module. The feedback signal module controls the second monitoring unit to conduct a re - check according to the re - check information. When the feedback signal module receives the re - check data fed back by the second monitoring unit, it transmits the re - check data to the third analysis module. The third analysis module analyzes the re - checked feedback data. When the analysis shows a normal state, the feedback signal fails and no longer serves as a transmission signal for transmission. When the analysis shows an abnormal state, it controls the second normally open contact in the second control module to close.

[0099] The fourth analysis module of the first monitoring module controls the opening and closing of the third normally open contact according to the situation of the L3 loop formed by the normally open contacts of the temperature sensor, pressure sensor, flowmeter, and gas relay. When the analysis shows a normal state, it does not control the state of the third normally open contact; when the analysis shows an abnormal state, it controls the third normally open contact to close.

[0100] The signal sending unit determines whether to send an alarm signal according to the states of the first normally open contact, the second normally open contact, and the third normally open contact. When any one of the first normally open contact, the second normally open contact, and the third normally open contact is in the normally open state, no alarm signal is sent; when the first normally open contact, the second normally open contact, and the third normally open contact are all in the closed state, the alarm component of the signal sending unit issues an alarm message. The ground object analysis module of the blocking unit controls the transformer to cut off the power according to the alarm message to avoid further expansion of the accident.

[0101] In summary, the non - electrical quantity protection real - time monitoring system for transformers provided by the present invention determines whether the transformer needs to cut off the power through the joint judgment of the first control unit, the second control unit, and the first monitoring unit to avoid further expansion of the accident. Moreover, the control of the transformer is determined through the full triggering of the first control unit, the second control unit, and the first monitoring unit, avoiding the occurrence of false triggering in the non - electrical quantity protection device. At the same time, in order to avoid the contingency of the detected non - electrical quantity signals, a second monitoring unit is specially set to further detect the non - electrical quantity factors in the transformer, ensuring the authenticity of the previously measured non - electrical quantity signals, thereby accurately judging the fault signals sent by the transformer and timely issuing corresponding blocking actions.

[0102] The above-disclosed is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or modifications, which should all be covered within the protection scope of the present invention.

Claims

1. An immediate monitoring system for non - electrical quantity protection of a transformer, characterized in that, Comprising: A non-electric quantity protection unit, which is used to detect the non-electric quantity parameters of the transformer and preprocess the detected non-electric quantity parameters; A first control unit, which is used to preliminarily analyze the preprocessed non-electric quantity parameters transmitted by the non-electric quantity protection unit and issue a first indication signal according to the preliminary analysis result; A second control unit, which is used to judge whether the preprocessed non-electric quantity parameters transmitted by the non-electric quantity protection unit are in an abnormal state. When there is an abnormal state, it issues a recheck signal and can receive the feedback signal of the recheck and output a second indication signal; A second monitoring unit, which is used to recheck the non-electric quantity parameters of the transformer according to the recheck signal and feedback the recheck result to the second control unit; A first monitoring unit, which is used to monitor the action state of the non-electric quantity protection unit and issue a third indication signal according to the action state; A signal generating unit, which judges whether to issue an alarm message according to the first indication signal, the second indication signal and the third indication signal; And A blocking unit, which controls the current flow of the transformer according to the alarm to protect the transformer.

2. The immediate monitoring system for non - electrical quantity protection of a transformer according to claim 1, characterized in that, The non-electric quantity parameters of the transformer detected by the non-electric quantity protection unit include: the pressure inside the transformer, the temperature of the transformer oil tank, the flow rate of the transformer oil inflow, and the state of the gas relay.

3. The immediate monitoring system for non - electrical quantity protection of a transformer according to claim 1, characterized in that, The non-electric quantity protection unit includes: An acquisition module, which is used to acquire the non-electric quantity parameters of the transformer; A first analysis module, which is used to preprocess the non-electric quantity parameters of the transformer; and An execution module, which is used to transmit the preprocessed non-electric quantity parameters.

4. The immediate monitoring system for non - electrical quantity protection of a transformer according to claim 3, characterized in that, The acquisition module includes: A gas relay, which is connected to the oil chamber pipeline of the transformer; A detection chamber, which is arranged on the oil chamber pipeline where the gas relay is connected to the transformer; A first pressure sensor, which is arranged in the detection chamber; A first temperature sensor, which is arranged on the pipeline where the gas relay is connected to the transformer; and A flowmeter, which is arranged on the pipeline where the gas relay is connected to the transformer.

5. The immediate monitoring system for non - electrical quantity protection of a transformer according to claim 1, characterized in that, The first control unit includes: A first signal receiving module, which is used to receive and transmit the preprocessed non-electric quantity parameters sent by the non-electric quantity protection unit; A second analysis module, which is used to preliminarily analyze the non-electric quantity parameters transmitted by the first signal receiving module; and A first normally open contact, which is electrically connected to the second analysis module. The second analysis module controls the opening and closing of the first normally open contact according to the result of the preliminary analysis, and the opening and closing signal of the first normally open contact is the first indication signal.

6. The immediate monitoring system for non - electrical quantity protection of a transformer according to claim 1, characterized in that, The second control unit includes: A second signal receiving module, which is used to receive and transmit the preprocessed non-electric quantity parameters transmitted by the non-electric quantity protection unit; A third analysis module, which determines the abnormal state according to the data transmitted by the second signal receiving module. When there is an abnormal state, it issues a recheck signal, analyzes according to the recheck feedback data, and feeds back the analysis result to the feedback signal module; A feedback signal module, which controls the corresponding unit to conduct a recheck according to the recheck information, transmits the rechecked data to the third analysis module, and simultaneously receives the feedback signal module; and A second normally open contact, which is electrically connected to the third analysis module. The third analysis module controls the opening and closing of the second normally open contact according to the feedback signal, and the opening and closing state of the second normally open contact is the second indication signal.

7. The immediate monitoring system for non - electrical quantity protection of a transformer according to claim 6, characterized in that, The second monitoring unit includes: A second temperature sensor, which is arranged on the inner wall of the oil chamber of the transformer; A second pressure sensor, which is arranged on the inner wall of the oil chamber of the transformer; and A transmission module, which is used to receive the recheck signal sent by the feedback signal module and feed back the data detected by the second temperature sensor and the second pressure sensor to the feedback signal module.

8. The transformer non-electrical quantity protection instant monitoring system according to claim 1, wherein, The first monitoring unit includes a fourth analysis module, a temperature sensor normally open contact, a pressure sensor normally open contact, a flowmeter normally open contact, a gas relay normally open contact, and a third normally open contact. The pressure sensor normally open contact and the temperature sensor normally open contact are connected in parallel to form an L1 circuit; the gas relay normally open contact and the flowmeter normally open contact are connected in parallel to form an L2 circuit, and the L1 circuit and the L2 circuit are connected in parallel to form an L3 circuit; one end of the L3 circuit is electrically connected to the non-electric quantity protection unit, and the other end is electrically connected to the fourth analysis module. The fourth analysis module is connected to the third normally open contact, and the opening and closing state of the third normally open contact is the third indication signal.

9. The transformer non-electrical quantity protection instant monitoring system according to claim 4, wherein, The corresponding current change range of the first temperature sensor is set to 6A - 10A; The corresponding current change range of the first pressure sensor is set to 0.6A - 1A; The actions of the flowmeter and the gas relay are set to two states: high level and low level.

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