阅读说明：本技术 一种用于提高非电量保护可靠性的系统及方法 (System and method for improving non-electric quantity protection reliability ) 是由 陈东阳 王传启 宋金川 董文宽 闫兆辉 卢洪堃 郭和山 赵双石 闫雪松 于 2019-12-16 设计创作，主要内容包括：本发明创造提供了一种用于提高非电量保护可靠性的系统及方法，包括继电器起动电压分类子系统和非电量保护子系统；所述继电器起动电压分类子系统包括继电器分类装置、以及为继电器分类装置供电的电源模块、以及用于控制电源模块工作的上位机。本发明创造通过将继电器起动电压分类和非电量保护相结合，设计了一种用于提高非电量保护可靠性的系统，主要在于对系统整体的设计，该系统通过设计两个子系统，在得到了具有合理起动电压区间的继电器，使得非电量保护起动回路具有更高的起动可靠性的同时，基于得到的待装继电器进行了非电量保护子系统的设计。(The invention provides a system and a method for improving the reliability of non-electric protection, comprising a relay starting voltage classification subsystem and a non-electric protection subsystem; the relay starting voltage classification subsystem comprises a relay classification device, a power supply module for supplying power to the relay classification device, and an upper computer for controlling the power supply module to work. The invention designs a system for improving the reliability of non-electric quantity protection by combining the classification of the starting voltage of a relay and the non-electric quantity protection, and mainly aims at the design of the whole system.)

1. A system for improving non-battery protection reliability, comprising a relay starting voltage classification subsystem and a non-battery protection subsystem:

the relay starting voltage classification subsystem comprises a relay classification device, a power supply module for supplying power to the relay classification device, and an upper computer for controlling the power supply module to work; the relay sorting device is provided with a plurality of Tport test ports for installing relays to be installed, and the upper computer is connected with each Tport test port through a direct-current voltage acquisition module and a switching value acquisition module; the power supply module comprises a direct current source for supplying power to the relay classification device and a program-controlled power switch for controlling the power on and off of each Tport test port, and the upper computer is electrically connected with the program-controlled power switch;

the non-electric quantity protection subsystem comprises an outlet module, a signal feedback module and a non-electric quantity input module, wherein the outlet module and the signal feedback module are arranged in parallel, the non-electric quantity input module is used for controlling the on-off of the outlet module and the signal feedback module, one end of the outlet module is connected with a positive control bus + KM through an IJ-1 contact switch, the other end of the outlet module is connected with a negative control bus-KM, one end of the signal feedback module is connected with the positive control bus + KM through an IJ-2 contact switch, and; the non-electric quantity input module comprises a non-electric quantity input port, a power control submodule, a class I relay submodule to be installed, a delay submodule 1 for controlling the delay of the class I relay submodule to be installed and a resetting submodule for controlling the resetting of the class I relay submodule to be installed, and the power control submodule and the class I relay submodule to be installed are arranged in parallel; the I-type to-be-installed relay submodule comprises classified I-type relays and a series power resistance submodule 1 used for adjusting current or power of a non-electric quantity input module, the delay submodule 1 and the reset submodule are connected with the I-type relays, and opening and closing of the IJ-1 contact switch and the IJ-2 contact switch are controlled by the I-type relays.

2. A system for improving non-battery protection reliability according to claim 1, wherein: the outlet module comprises an outlet relay, a delay submodule 2 for controlling the delay of the outlet relay and a series power resistance submodule 2 for adjusting the current or power of the outlet module; and the delay submodule 2 is connected with an outlet relay.

3. A system for improving non-battery protection reliability according to claim 1, wherein: the signal feedback module comprises a control relay, a signal relay and a series power resistance submodule 3 for adjusting the current or power of the signal feedback module; and a KJ contact switch used for controlling the on-off of the non-electric quantity input port is arranged on the non-electric quantity input port, and the KJ contact switch is controlled by a control relay.

4. A method for improving the non-battery protection reliability system according to claim 1, comprising:

s1, firstly, classifying the relays to be installed by utilizing the relay starting voltage classification subsystem; classifying the relay into a class I and a class II according to the starting voltage V grade of the relay to be installed;

s2, designing a non-electric-quantity protection subsystem by utilizing the classified class I relays;

s3, designing an outlet module, a non-electric quantity input module and a signal feedback module in the non-electric quantity protection subsystem;

s4, designing a non-electric quantity protection subsystem control logic for realizing non-electric quantity protection;

s5, searching the optimal performance parameters of the non-electric quantity protection subsystem in the S2 by utilizing an improved particle swarm optimization algorithm;

s6, when the performance parameters of the non-electric quantity protection subsystem are optimal and stable, counting a large amount of performance parameter data and inputting the data into the relay starting voltage classification subsystem in the step S1 to optimize the classification of the relays to be installed; and through repeated iterative operation, the optimal classification of the relays to be installed is realized, so that the performances of the relay starting voltage classification subsystem and the non-electric quantity protection subsystem are improved.

5. The method of claim 4, wherein the step of determining the power level of the power supply further comprises the step of: in step S1, the relay to be installed is a small-sized, polar, double-coil magnetic latching power relay.

6. The method for improving the non-battery protection reliability according to claim 4, wherein the relay starting voltage classification subsystem in the step S1 includes the following specific classification method for the to-be-installed relay:

s11, installing n relays to be installed on the relay sorting device;

s12, controlling the program control power switch by the upper computer through intelligent relay classification software to enable the direct current source to be in a v shape₀Step-by-step adjustment of output voltage value with step period set to t₁；

S13, determining a classification threshold V according to the voltage level of the non-electric quantity protection_fClass I relays having starting voltage V greater than V_fAnd the rest is II;

s14, starting classification, collecting the voltage value of n paths of Tport in real time by the direct current voltage collection module, setting the voltage value as a synchronous sampling mode of the n paths of Tport, wherein the sampling period is t₂(ii) a The switching value acquisition module dynamically monitors the deflection condition of the relay contact, and is set to be in a polling mode with a polling period of t₃Should satisfy t₂<t₃<t₁And when the contact is displaced, the upper computer records the voltage value V uploaded by the current direct-current voltage acquisition module at once and locks the current Tport until all the n paths of Tports are classified.

7. The method of claim 4, wherein the step of determining the power level of the power supply further comprises the step of: in step S3, when the non-power input module is activated, the power value of the power control sub-module should be greater than or equal to W₁。

8. The method of claim 7, wherein in step S4, the specific control logic of the non-battery protection subsystem is:

when a non-electric signal is input, the condition that the input power is more than W is met₁And the input can be held to delay submodule 1 for delay t₅When the operation is finished, the class I relay acts, the IJ-1 contact switch and the IJ-2 contact switch are closed, and the relay and the signal relay are controlled to start; after the control relay is started, the KJ contact switch is controlled to be opened, so that the non-electric quantity input module is powered off, the power control sub-module also stops working at the same time, the power consumption of the non-electric quantity protection sub-system is reduced, and after the non-electric quantity input module is powered off, all contacts are kept in the current state; after the IJ-1 contact switch is closed, the delay t is delayed by a delay submodule 2₆The outlet relay is started, and at the moment, the outlet relay contact can be used for contacting an external outlet;

when external interference is input, the input energy of the interference is less than W₁Or fail to hold until delay submodule 1 delays t₅And when the operation is finished, the class I relay is not started.

9. The method of claim 4, wherein in the step S5, the specific method for improving the particle swarm optimization algorithm to search the optimal performance parameters of the non-battery protection subsystem in the step S2 is as follows:

s51, acquiring the total time t from the starting of the class I relay to the starting of the outlet relay₇，t₇Equal to class I relay action time t₀、t₄、t₅And t₆Sum, set t₇As a feature vector;

s52, setting search time interval (T)_QL,T_QH) Initializing particle position, velocity, population size, learning factor, maximum number of iterations T_maxInertia weight ω and a position update equation;

s53, dynamically adjusting the inertia weight omega according to the particle distance, smoothing the search characteristic of the inertia weight omega, balancing the local and global search states, making the solution tend to be stable and fast convergent, and avoiding falling into local optimum;

s54, optimizing the particle space through repeated iteration until the search time interval (T) is satisfied_QL,T_QH) Or maximum number of iterations T_maxStopping iteration and outputting an optimal solution;

s55, obtaining an optimal solution, determining the optimal starting voltage data of the class I relay according to the optimal solution, and optimizing the classification accuracy of the relay starting voltage classification subsystem;

and S56, if the optimal solution is not obtained, returning to continue searching and optimizing until the conditions are met.

Technical Field

The invention belongs to the field of relay protection, and particularly relates to a system and a method for improving non-electric quantity protection reliability.

Background

In order to ensure the safe and reliable operation of the traction transformer of the electrified railway, the traction transformer is provided with electric quantity protection and non-electric quantity protection. As an important supplement to electric quantity protection, the criterion of non-electric quantity protection is non-electric quantity such as gas volume, flow rate, oil level height, pressure, temperature, oil level and the like. The non-electric quantity protection mainly comprises light gas of a body, heavy gas of the body, overhigh oil temperature, pressure release, over-temperature tripping and the like, wherein the heavy gas protection, the pressure release, the over-temperature tripping and the like are always matched with differential protection to be used as the main transformer protection of the transformer.

However, the non-electric quantity signal of the external connection needs to be connected to the main transformer through a cable, if the cable is too long or the laying is not reasonable, the interference of higher harmonic components is easy to be introduced into the input of non-electric quantity protection through the distributed capacitance on the cable, and finally misoperation is caused; or, if a real fault occurs, although the non-electric quantity signal introduces the non-electric quantity protection, the failure or the malfunction caused by the unreasonable design of the non-electric quantity protection plug-in will cause a great influence on the safe operation of the traction power supply system.

Therefore, the malfunction or the rejection of the non-electric quantity protection becomes a primary factor influencing the reliability of the traction transformer, and designers should fully recognize the importance of the non-electric quantity protection of the traction transformer and strive to improve the reliability, the safety and the stability of the non-electric quantity protection, so as to provide guarantee for the safe and reliable operation of the traction transformer of the electrified railway.

Disclosure of Invention

Accordingly, the present invention is directed to overcoming the above-mentioned drawbacks of the prior art and providing a system and method for improving the reliability of non-power protection.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a system for improving non-battery protection reliability, comprising a relay starting voltage classification subsystem and a non-battery protection subsystem:

the relay starting voltage classification subsystem comprises a relay classification device, a power supply module for supplying power to the relay classification device, and an upper computer for controlling the power supply module to work; the relay sorting device is provided with a plurality of Tport test ports for installing relays to be installed, and the upper computer is connected with each Tport test port through a direct-current voltage acquisition module and a switching value acquisition module; the power supply module comprises a direct current source for supplying power to the relay classification device and a program-controlled power switch for controlling the power on and off of each Tport test port, and the upper computer is electrically connected with the program-controlled power switch;

the non-electric quantity protection subsystem comprises an outlet module, a signal feedback module and a non-electric quantity input module, wherein the outlet module and the signal feedback module are arranged in parallel, the non-electric quantity input module is used for controlling the on-off of the outlet module and the signal feedback module, one end of the outlet module is connected with a positive control bus + KM through an IJ-1 contact switch, the other end of the outlet module is connected with a negative control bus-KM, one end of the signal feedback module is connected with the positive control bus + KM through an IJ-2 contact switch, and; the non-electric quantity input module comprises a non-electric quantity input port, a power control submodule, a class I relay submodule to be installed, a delay submodule 1 for controlling the delay of the class I relay submodule to be installed and a resetting submodule for controlling the resetting of the class I relay submodule to be installed, and the power control submodule and the class I relay submodule to be installed are arranged in parallel; the I-type to-be-installed relay submodule comprises classified I-type relays and a series power resistance submodule 1 used for adjusting current or power of a non-electric quantity input module, the delay submodule 1 and the reset submodule are connected with the I-type relays, and opening and closing of the IJ-1 contact switch and the IJ-2 contact switch are controlled by the I-type relays.

Further, the outlet module comprises an outlet relay, a delay submodule 2 for controlling the delay of the outlet relay, and a series power resistance submodule 2 for adjusting the current or power of the outlet module; and the delay submodule 2 is connected with an outlet relay.

Further, the signal feedback module comprises a control relay, a signal relay and a series power resistance submodule 3 for adjusting the current or power of the signal feedback module; and a KJ contact switch used for controlling the on-off of the non-electric quantity input port is arranged on the non-electric quantity input port, and the KJ contact switch is controlled by a control relay.

A method of applying the system for improving non-battery protection reliability, comprising:

s1, firstly, classifying the relays to be installed by utilizing the relay starting voltage classification subsystem; classifying the relay into a class I and a class II according to the starting voltage V grade of the relay to be installed;

s2, designing a non-electric-quantity protection subsystem by utilizing the classified class I relays;

s3, designing an outlet module, a non-electric quantity input module and a signal feedback module in the non-electric quantity protection subsystem;

s4, designing a non-electric quantity protection subsystem control logic for realizing non-electric quantity protection;

s5, searching the optimal performance parameters of the non-electric quantity protection subsystem in the S2 by utilizing an improved particle swarm optimization algorithm;

s6, when the performance parameters of the non-electric quantity protection subsystem are optimal and stable, counting a large amount of performance parameter data and inputting the data into the relay starting voltage classification subsystem in the step S1 to optimize the classification of the relays to be installed; and through repeated iterative operation, the optimal classification of the relays to be installed is realized, so that the performances of the relay starting voltage classification subsystem and the non-electric quantity protection subsystem are improved.

Further, in step S1, the relay to be installed is a small-sized, polar, double-coil magnetic holding type power relay.

Further, the specific classification method of the relay starting voltage classification subsystem to the relays to be mounted in the step S1 is as follows:

s11, installing n relays to be installed on the relay sorting device;

s12, controlling the program control power switch by the upper computer through intelligent relay classification software to enable the direct current source to be in a v shape₀Step-by-step adjustment of output voltage value with step period set to t₁；

S13, determining a classification threshold V according to the voltage level of the non-electric quantity protection_fClass I relays having starting voltage V greater than V_fAnd the rest is II;

s14, starting classification, collecting the voltage value of n paths of Tport in real time by the direct current voltage collection module, setting the voltage value as a synchronous sampling mode of the n paths of Tport, wherein the sampling period is t₂(ii) a The switching value acquisition module dynamically monitors the deflection condition of the relay contact, and is set to be in a polling mode with a polling period of t₃Should satisfy t₂<t₃<t₁And when the contact is displaced, the upper computer records the voltage value V uploaded by the current direct-current voltage acquisition module at once and locks the current Tport until all the n paths of Tports are classified.

Further, in step S3, when the non-electrical-quantity input module is activated, the power value of the power control sub-module should be greater than or equal to W₁。

Further, in step S4, the specific control logic of the non-electric-quantity protection subsystem is as follows:

when a non-electric signal is input, the condition that the input power is more than W is met₁And the input can be held to delay submodule 1 for delay t₅When the operation is finished, the class I relay acts, the IJ-1 contact switch and the IJ-2 contact switch are closed, and the relay and the signal relay are controlled to start; after the control relay is started, the KJ contact switch is controlled to be opened,the power-down of the non-electric quantity input module is realized, the power control sub-module also stops working at the same time, the power consumption of the non-electric quantity protection sub-system is reduced, and all contacts are kept in the current state after the power-down of the non-electric quantity input module; after the IJ-1 contact switch is closed, the delay t is delayed by a delay submodule 2₆The outlet relay is started, and at the moment, the outlet relay contact can be used for contacting an external outlet;

when external interference is input, the input energy of the interference is less than W₁Or fail to hold until delay submodule 1 delays t₅And when the operation is finished, the class I relay is not started.

Further, in the step S5, a specific method for searching the optimal performance parameter of the non-battery protection subsystem in the step S2 by using the improved particle swarm optimization algorithm is as follows:

s51, acquiring the total time t from the starting of the class I relay to the starting of the outlet relay₇，t₇Equal to class I relay action time t₀、t₄、t₅And t₆Sum, set t₇As a feature vector;

s52, setting search time interval (T)_QL,T_QH) Initializing particle position, velocity, population size, learning factor, maximum number of iterations T_maxInertia weight ω and a position update equation;

s53, dynamically adjusting the inertia weight omega according to the particle distance, smoothing the search characteristic of the inertia weight omega, balancing the local and global search states, making the solution tend to be stable and fast convergent, and avoiding falling into local optimum;

s54, optimizing the particle space through repeated iteration until the search time interval (T) is satisfied_QL,T_QH) Or maximum number of iterations T_maxStopping iteration and outputting an optimal solution;

s55, obtaining an optimal solution, determining the optimal starting voltage data of the class I relay according to the optimal solution, and optimizing the classification accuracy of the relay starting voltage classification subsystem;

and S56, if the optimal solution is not obtained, returning to continue searching and optimizing until the conditions are met.

Compared with the prior art, the invention has the following advantages:

the invention designs a system for improving the reliability of non-electric quantity protection by combining the starting voltage classification of a relay and the non-electric quantity protection, mainly aiming at the integral design of the system, the system obtains the relay with a reasonable starting voltage interval by designing two subsystems, the non-electric quantity protection starting loop has higher starting reliability, and the design of the non-electric quantity protection subsystem is carried out based on the obtained relay to be installed, so that the non-electric quantity protection subsystem has the functions of resetting the relay holding coil, delaying the action under the rated voltage and ensuring that the starting needs to reach a certain power, and after the class I relay is started, the signal feedback loop is used for automatically cutting off the non-electric quantity starting loop so as to reduce the overall power consumption of the non-electric quantity protection subsystem, so that the reliability of interference resistance and misoperation prevention of the non-electric quantity protection is greatly improved, and the robustness of the comprehensive automation system of the traction substation is enhanced.

The invention also provides a method for improving the reliability of non-electric protection, which classifies the relays according to the starting voltage of the relays to obtain the relays with reasonable starting voltage intervals, so that a non-electric protection starting circuit has higher starting reliability; meanwhile, by designing modules such as resetting, time delay, power control, signal feedback and the like, the non-electric quantity protection subsystem has the advantages that the resetting of a relay holding coil, action delay under rated voltage and starting requirement can reach certain power, and after the I-type relay is started, a signal feedback loop is used for automatically cutting off the non-electric quantity starting loop so as to reduce the overall power consumption of the non-electric quantity protection subsystem; and finally, searching the optimal performance parameters of the non-electric quantity protection subsystem by using an improved particle swarm optimization algorithm, counting a large amount of performance parameter data, and reversely inputting the data into the relay starting voltage classification subsystem to optimize the classification of the relay to be installed, so that the non-electric quantity protection starting voltage is more accurate and controllable, and the reliability of interference resistance and misoperation prevention of the non-electric quantity protection can be improved through repeated iterative operation and test.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the invention without limitation. In the drawings:

fig. 1 is a schematic diagram of a system for improving non-battery protection reliability according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a relay starting voltage classification subsystem according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a non-power protection subsystem according to an embodiment of the present invention.

Detailed Description

It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which are merely for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.

In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be construed broadly, e.g. as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.

The invention will be described in detail with reference to the following embodiments with reference to the attached drawings.

A system for improving non-battery protection reliability, as shown in fig. 1 to 3, includes a relay starting voltage classification subsystem and a non-battery protection subsystem:

the relay starting voltage classification subsystem comprises a relay classification device, a power supply module for supplying power to the relay classification device, and an upper computer for controlling the power supply module to work; the relay sorting device is provided with a plurality of Tport test ports for installing relays to be installed, and the upper computer is connected with each Tport test port through a direct-current voltage acquisition module and a switching value acquisition module; the power supply module comprises a direct current source for supplying power to the relay classification device and a program-controlled power switch for controlling the power on and off of each Tport test port, and the upper computer is electrically connected with the program-controlled power switch;

specifically, with reference to fig. 2 and 3, the detailed technical solution is as follows:

as shown in fig. 2, the relay to be installed is classified by the relay starting voltage classification subsystem, and the purpose of classification is to find the relay to be installed with proper starting voltage; according to the characteristics of the relays, the relays produced by relay suppliers have large difference, and even if the relays have the same voltage grade, the starting voltage values are also greatly different; the relay is a key device for designing non-electric quantity protection, and the starting voltage fluctuation range of the relay is large, so that the problems of instability, misoperation, failure in operation and the like of the non-electric quantity protection are caused; therefore, the starting voltage of the relay is unreliable only by calculating the datasheet of the relay, the relay needs to be classified by an auxiliary classification system, and manual classification is time-consuming, labor-consuming and high in cost and has low classification accuracy;

therefore, the invention firstly designs a relay starting voltage classification subsystem, and the system can be used for conveniently, quickly and accurately classifying the relays to be installed; the relay starting voltage classification subsystem designed in the invention can realize rapid and accurate classification of the relays to be installed, thereby greatly improving the classification efficiency and accuracy of the relays to be installed;

specifically, the voltage regulation range of the direct current source is 0-300V, and direct current voltage can be provided for most relay tests;

the relay sorting device comprises 10 conventional Tport test ports and 2 standby Tport test ports, has the test capability of various packages, can switch base packages only by selecting different modes, and realizes the sorting of various relays.

The program-controlled power switch is a multi-path program-controlled switch, has wide working frequency, is suitable for DC-100 MHz, has high distance between paths, has 32 paths of I/O for each device, can be cascaded, has a remote control function, and can be configured through a network;

the direct-current voltage acquisition module can simultaneously acquire 16 direct-current voltages to the maximum extent, has the resolution of 16 bits, the sampling rate of 200kSPS, a buffer with 1 megaohm analog input impedance and an extensible acquisition channel;

the state quantity acquired by the switching value acquisition module is the measured contact closing/opening condition of the relay to be installed, so that whether the relay is started or not can be judged;

the relay to be installed is a small-sized, polar and double-coil magnetic latching power relay; specifically, the relay to be installed is a small-sized, polarized and double-coil magnetic holding type power relay, a relay with the model of loose DSP2a-L2-24V can be adopted, the theoretical starting voltage range is 80% or less of a rated value, and the actual measurement starting voltage range is about 9.5V-17.7V;

the invention mainly creates the innovation point of structural design and improvement of a relay starting voltage classification subsystem, mainly provides a hardware frame structure for a system for improving non-electric quantity protection reliability, does not relate to upper computer control software, and can be used by a person skilled in the art by self selection as long as the control of a program control power switch can be realized.

The non-electric quantity protection subsystem comprises an outlet module, a signal feedback module and a non-electric quantity input module, wherein the outlet module and the signal feedback module are arranged in parallel, the non-electric quantity input module is used for controlling the on-off of the outlet module and the signal feedback module, one end of the outlet module is connected with a positive control bus + KM through an IJ-1 contact switch, the other end of the outlet module is connected with a negative control bus-KM, one end of the signal feedback module is connected with the positive control bus + KM through an IJ-2 contact switch, and; the non-electric quantity input module comprises a non-electric quantity input port, a power control submodule, a class I relay submodule to be installed, a delay submodule 1 for controlling the delay of the class I relay submodule to be installed and a resetting submodule for controlling the resetting of the class I relay submodule to be installed, and the power control submodule and the class I relay submodule to be installed are arranged in parallel; the I-type to-be-installed relay submodule comprises classified I-type relays and a series power resistance submodule 1 used for adjusting current or power of a non-electric quantity input module, the delay submodule 1 and the reset submodule are connected with the I-type relays, and opening and closing of the IJ-1 contact switch and the IJ-2 contact switch are controlled by the I-type relays.

The outlet module comprises an outlet relay, a delay submodule 2 for controlling the delay of the outlet relay and a series power resistance submodule 2 for adjusting the current or power of the outlet module; the delay submodule 2 is connected with an outlet relay; specifically, the outlet relay is a quick outlet relay, and the action time is less than t₄The lower power limit values of the series power resistance submodule 1 and the series power resistance submodule 2 are both larger than W₀。

The signal feedback module comprises a control relay, a signal relay and a series power resistance submodule 3 for adjusting the current or power of the signal feedback module; and a KJ contact switch used for controlling the on-off of the non-electric quantity input port is arranged on the non-electric quantity input port, and the KJ contact switch is controlled by a control relay.

Specifically, as shown in fig. 3, in the non-electric-quantity protection subsystem, the outlet relay may adopt a loose DK2a-24V relay, the action time is less than 3ms, the lower limit values of the power of the series power resistance submodule 1 and the power of the series power resistance submodule 2 are both greater than 3W, one end of each of the series power resistance submodules 1 and 2 is respectively connected with the negative electrode of the class i relay coil and the negative electrode of the outlet relay coil, the other end of each of the series power resistance submodules is connected to-KM, and the contact IJ-1 of the class i relay has one end connected with the positive electrode of the outlet relay coil and the other end connected to + KM; the reset submodule is connected with a reset coil of the class I relay, and when the class I relay is started, the reset is needed, and the operation of the reset submodule can be completed;

the delay submodule 1 is connected with a class I relay in parallel, the delay submodule 2 is connected with an outlet relay in parallel, and the delay submodule 1 and the delay submodule 2 are both composed of metallized polyester film capacitors (immersion type), and the delay submodule 1 and the delay submodule 2 adopt a noninductive winding structure, have wide capacity range, small volume, light weight, good self-healing property, long service life and flame-retardant epoxy powder encapsulation, and are particularly suitable for the requirements of stability and reliability of a relay protection device; the delay time of the delay submodule 1 is set to 15ms, the delay time of the delay submodule 1 is set to 5ms, and due to the existence of accumulated errors and large fluctuation of the delay time of the time, other performance parameters needing non-electric quantity protection are cooperated and matched to find an optimal value; the principle of the method is that the power frequency alternating current is charged in the positive half cycle of the power frequency alternating current, and the negative half shaft discharges; when the charging voltage reaches the starting voltage of the relay, the relay acts to achieve the effect of time delay;

the signal feedback module comprises a control relay, a signal relay and a series power resistance submodule 3 which are connected in series, wherein one end of the series power resistance submodule 3 is connected with-KM, and the other end of the series power resistance submodule 3 is connected with the negative pole of a signal relay coil; one end of a contact KJ of the control relay is connected with the anode of the coil of the class I relay, and the other end of the contact KJ is connected with input, namely non-electric quantity signal input; one end of a contact IJ-2 of the class I relay is connected with the positive electrode of a coil of the control relay, and the other end of the contact IJ-2 is connected with + KM; the power control submodule is connected with the positive electrode of the I-type relay coil, the other end of the power control submodule is connected with-KM, and the resetting submodule of the power control submodule is connected with the I-type relay; when the non-electric quantity protection starting loop acts, the power value of the power control sub-module is more than or equal to 5W;

the high-reliability class I relay is obtained through the classification of the relay starting voltage classification subsystem, and meanwhile, an outlet module, a signal feedback module and a non-electric quantity input module for controlling the on-off of the outlet module and the signal feedback module are added, so that the anti-interference performance and the reliability of the non-electric quantity protection subsystem are greatly improved; the starting power of the non-electric quantity protection acting on tripping is more than 5W, the starting voltage is within 55-70% of the rated direct-current power supply voltage, the action time under the rated direct-current power supply voltage is 10-35 ms, and the capacity of resisting 220V power frequency voltage interference is achieved, so that the requirements of 'determining action and determining non-action' of the non-electric quantity protection are met.

A method for applying the system for improving the reliability of non-electric quantity protection comprises the following steps:

s1, firstly, classifying the relays to be installed by utilizing the relay starting voltage classification subsystem; classifying the relay into a class I and a class II according to the starting voltage V grade of the relay to be installed;

s2, designing a non-electric-quantity protection subsystem by utilizing the classified class I relays;

s3, designing an outlet module, a non-electric quantity input module and a signal feedback module in the non-electric quantity protection subsystem;

s4, designing a non-electric quantity protection subsystem control logic for realizing non-electric quantity protection;

s5, searching the optimal performance parameters of the non-electric quantity protection subsystem in the S2 by utilizing an improved particle swarm optimization algorithm;

s6, when the performance parameters of the non-electric quantity protection subsystem are optimal and stable, counting a large amount of performance parameter data and inputting the data into the relay starting voltage classification subsystem in the step S1 to optimize the classification of the relays to be installed; and through repeated iterative operation, the optimal classification of the relays to be installed is realized, so that the performances of the relay starting voltage classification subsystem and the non-electric quantity protection subsystem are improved.

The specific classification method of the relay starting voltage classification subsystem to be mounted in the step S1 is as follows:

s11, installing n relays to be installed on the relay sorting device;

s12, controlling the program control power switch by the upper computer through intelligent relay classification software to enable the direct current source to be in a v shape₀Step-by-step adjustment of output voltage value with step period set to t₁；

S13, determining a classification threshold V according to the voltage level of the non-electric quantity protection_fClass I relays having starting voltage V greater than V_fAnd the rest is II;

s14, starting classification, collecting the voltage value of n paths of Tport in real time by the direct current voltage collection module, setting the voltage value as a synchronous sampling mode of the n paths of Tport, wherein the sampling period is t₂(ii) a The switching value acquisition module dynamically monitors the deflection condition of the relay contact, and is set to be in a polling mode with a polling period of t₃Should satisfy t₂<t₃<t₁And when the contact is displaced, the upper computer records the voltage value V uploaded by the current direct-current voltage acquisition module at once and locks the current Tport until all the n paths of Tports are classified.