CN105097356A - Control method and device - Google Patents

Abstract

The embodiment of the present invention provides a control method and device, which relate to the field of electric power technology, and can solve the problem that in the prior art, the sequence of the response operation of the relays in the series relay group is fixed, so that the relays perform the live response operation for a long time or the long-term non-charge operation. Response operation, resulting in the problem of low reliability of the relay. The specific solution is: the control device determines whether the trigger condition of the series relay group is met, and the series relay group includes at least two sequentially connected relays. Actions include closing contacts or opening contacts. The embodiment of the invention is used to control a relay.

Description

A control method and device

technical field

The embodiments of the present invention relate to the field of electric power technology, and in particular, to a control method and device.

Background technique

The relay is an electrical control device, including normally open, normally closed and conversion relays, which are widely used in remote control, telemetry, communication, automatic control, mechatronics and power electronic equipment. In practical applications, series relays are usually used To ensure the reliability of the relay. When the trigger condition of the series relay is met, the series relay performs a response operation to connect or disconnect the circuit connected at both ends of the relay, and the response operation may include closing or opening a contact. Normally, if n (n is an integer greater than or equal to 2) relays are connected in series, when the circuits disconnected at both ends of the series relays are connected through the response operation of the series relays, the first to n-1 The relay that performs the response operation performs an uncharged response operation because the circuit is disconnected so that there is no voltage difference between the contacts, and the nth relay that performs the response operation performs a live response because the circuit is connected so that there is a voltage difference between the contacts Operation; when the circuits connected to each other at both ends of the series relay are disconnected through the response operation of the series relay, the first relay that performs the response operation will perform a live response operation due to the connection of the circuit so that there is a voltage difference between the contacts. The first to nth relays that perform response operations perform deenergized response operations due to the disconnection of the circuit so that there is no voltage difference between the contacts.

In the prior art, the order in which the relays in the series relays perform response operations is fixed, so that a certain relay in the series relays performs a live response operation or a long-term non-charge response operation. For example, when the disconnected inverter and the grid are connected through the two normally open series relays shown in Figure 1, it is fixed to close the relay K1 first, and then close the relay K2, then K1 will be closed without power for a long time, and K2 is charged and closed for a long time. Long-term uncharged response operation of the relay (such as K1) will cause the air oxide film on the contact surface to continue to accumulate because it has not been completely broken down, thereby increasing the contact resistance, causing severe contact heating, and reducing reliability. However, the relay (such as K2) operated by long-term charged response makes the contacts melt and vaporize due to the generation of arc and inrush current, thereby reducing the reliability.

For a single relay that is closed without power for a long time, in the prior art, a small voltage difference |V3-V4| is added at both ends of the relay through the step-down conversion circuit shown in Figure 2, so that an arc strike can be generated when it is closed Wear the oxide film of the contact, avoid the continuous accumulation of the oxide film, and improve the reliability of the relay K3; for a single relay that is charged and closed for a long time, in the prior art, the voltage difference between the two ends of the contact is reduced to an appropriate value. , Reduce the intensity of the inrush current, reduce the arc energy, and improve the reliability of the relay. However, the above two methods can usually only be used to improve the reliability of a single relay respectively, and cannot be applied to the scenario of series relays to meet the reliability requirements for series relays.

Contents of the invention

The embodiment of the present invention provides a control method and device, which can solve the problem that in the prior art, the sequence of the response operations of the relays in the series relay group is fixed, so that the relays perform the live response operation or the non-charge response operation for a long time, resulting in The problem of low reliability of relays.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

In the first aspect, a control method is provided, including:

determining whether a trigger condition of a series relay group comprising at least two sequentially connected relays is met;

If it is determined to be yes, then control the order in which the relays in the series relay group perform response operations according to preset rules, and the response operations include closing contacts or opening contacts.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the controlling the sequence of responding operations of the relays in the series relay group according to preset rules includes:

Randomly arrange the identifiers corresponding to the relays in the series relay group, and control the relays to perform response operations sequentially according to the arrangement order corresponding to the identifiers.

With reference to the first aspect, in a second possible implementation manner of the first aspect, the controlling the sequence of responding operations of the relays in the series relay group according to preset rules includes:

Selecting elements in a preset arrangement order set according to preset rules, the elements being the arrangement order of the identifiers respectively corresponding to the relays in the series relay group;

The order in which the relays perform response operations is controlled according to the arrangement order corresponding to the selected elements.

With reference to the second possible implementation of the first aspect, in the third possible implementation of the first aspect, the selection of elements in the preset arrangement order set according to preset rules includes:

When the number of times the control device controls the relay to perform response operations according to the currently selected element is equal to the number threshold, the elements in the preset arrangement order set are reselected.

With reference to the second possible implementation of the first aspect, in the fourth possible implementation of the first aspect, the selection of elements in the preset arrangement order set according to preset rules includes:

When the time for the control device to control the relay to perform a response operation according to the currently selected element is greater than or equal to a time threshold, re-select the elements in the preset arrangement order set.

In combination with any one of the first aspect to the fourth possible implementation of the first aspect, in the fifth possible implementation of the first aspect, one end of the series relay group is connected to the inverter, and the other One end is connected to the grid.

In a second aspect, a control device is provided, including:

A determining unit, configured to determine whether a trigger condition of a series relay group is met, and the series relay group includes at least two sequentially connected relays;

The control unit is configured to, if the determination unit determines yes, control the order of the relays in the series relay group to perform response operations according to preset rules, the response operations including closing contacts or opening contacts.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the control unit is specifically configured to:

Randomly arrange the identifiers corresponding to the relays in the series relay group, and control the relays to perform response operations sequentially according to the arrangement order corresponding to the identifiers.

With reference to the second aspect, in a second possible implementation manner of the second aspect, the control unit is specifically configured to:

Selecting elements in a preset arrangement order set according to preset rules, the elements being the arrangement order of the identifiers respectively corresponding to the relays in the series relay group;

The order in which the relays perform response operations is controlled according to the arrangement order corresponding to the selected elements.

With reference to the second possible implementation of the second aspect, in a third possible implementation of the second aspect, the control unit is specifically configured to:

When the number of times the relay is controlled to perform response operations according to the currently selected element is equal to the number threshold, the elements in the preset arrangement order set are reselected.

With reference to the second possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, the control unit is specifically configured to:

When the time for controlling the relay to perform a response operation according to the currently selected element is greater than or equal to a time threshold, re-select the elements in the preset arrangement order set.

In combination with any one of the second aspect to the fourth possible implementation of the second aspect, in the fifth possible implementation of the second aspect, one end of the series relay group is connected to the inverter, and the other One end is connected to the grid.

Embodiments of the present invention provide a control method and device. When the control device determines that the trigger condition of the series relay group is met, the order in which the relays in the series relay group perform response operations is controlled according to preset rules, so that the relays in the series relay group perform The order of the response operations can be flexibly set as required, so that the relays in the series relay group can alternately perform the live response operation and the non-charge response operation, without making a certain relay conduct the live response operation or Long-term uncharged response operation. Therefore, it can solve the problem of low reliability of the relays in the prior art because the sequence of the response operations of the relays in the series relay group is fixed, so that the relays perform the live response operation or the long-term non-charge response operation for a long time, thus prolonging the series connection The service life of any relay in the relay group improves the overall reliability of any relay and the series relay group.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some of the present invention. Embodiments, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

Fig. 1 is a structural schematic diagram of a series connection of two relays provided in the prior art;

2 is a schematic diagram of a circuit structure for improving the reliability of a single relay through a step-down conversion circuit provided in the prior art;

Fig. 3 is a schematic flow chart of a method provided by an embodiment of the present invention;

Fig. 4 is a schematic structural diagram of a control device provided by an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Relays may include normally open relays, normally closed relays, and changeover relays. Among them, the normally open relay includes two contacts, the two contacts are disconnected when the power is not energized, and the two contacts are closed after the power is energized. The normally closed relay also includes two contacts, the two contacts are closed when the power is not energized, and the two contacts are disconnected when the power is energized. The conversion relay includes three contacts, the middle is a moving contact, and the upper and lower static contacts are respectively. When the power is not energized, the moving contact and the first static contact are closed, and the second static contact is disconnected. The moving contact is disconnected from the first static contact and closed with the second static contact. Since the relays may include the above three types, at least two relays connected in series in the serial relay group may also include one or more of the above three types.

Specifically, when the circuits disconnected at both ends of the series relay group need to be connected through the response operation of the relays in the series relay group, the response operation of the normally open relay in the series relay group is a closed contact, and the response operation of the normally closed relay is The operation is to open the contact, and the response operation of the conversion relay is to open the movable contact and the first static contact and then close the movable contact and the second static contact. When the connected circuits at both ends of the series relay group need to be disconnected through the response operation of the relays in the series relay group, the response operation of the normally open relay in the series relay group is to open the contact, and the response operation of the normally closed relay is to close The response operation of the changeover relay is to first open the moving contact and the second static contact and then close the moving contact and the first static contact.

And because under normal circumstances, when the disconnected circuits at both ends of the series relay are connected through the response operation of the series relay, the last relay that performs the response operation will perform a live response operation due to the voltage difference between the contacts after the circuit is connected. , the relay that performed the response operation before performed an uncharged response operation because the circuit was disconnected so that there was no voltage difference between the contacts; when the circuits connected to each other at both ends of the series relay were disconnected through the response operation of the series relay, the first The relay that performs the response operation performs a live response operation because the circuit is connected so that there is a voltage difference between the contacts, and the relay that performs the subsequent response operation performs an uncharged response operation because the circuit is disconnected so that there is no voltage difference between the contacts.

Therefore, when the disconnected circuit at both ends of the series relay is connected through the response operation of the series relay, if the normally open relay is the last relay to perform the response operation, then the relay will be charged and closed, if it is not the last one to perform the response operation If the normally closed relay is the last relay to respond to the operation, the relay will be disconnected with power on, if it is not the last relay to respond to the operation, it will be disconnected without power; if the switch If the type relay is the last relay to respond, the relay will be disconnected first, and then closed with power. If it is not the last relay to respond, it will be disconnected first, and then closed with power.

Similarly, when the circuits connected to each other at both ends of the series relay are disconnected through the response operation of the series relay, if the normally open relay is the first relay to respond to the operation, the relay will be disconnected with power, if it is not the first The relay that responds to the operation will be disconnected without power; if the normally closed relay is the first relay to respond to the operation, the relay will be closed with power on, and if it is not the first relay to respond to the operation, it will be de-energized Close; if the conversion relay is the first relay to respond, the relay will be disconnected with power first, and then closed with no power. If it is not the first relay to respond with operation, it will be disconnected with no power first. Then perform an uncharged closure.

An embodiment of the present invention provides a control method, referring to FIG. 3 , the main steps of which may include:

101. The control device determines whether a trigger condition of a series relay group is met, and the series relay group includes at least two relays connected in series in sequence.

Wherein, the control device here may be a computer, an intelligent control chip and other control devices. In this step, the control device can determine whether the trigger condition of the series relay group is met, and the trigger condition refers to triggering the relays in the series relay group to perform a response operation, so that the circuits connected at both ends of the series relay group are connected or disconnected. The setting conditions can be set according to actual needs.

Exemplarily, the series relay group can be applied in the grid-connection process of the inverter, and one end of the series relay group can be connected to the inverter, and the other end can be connected to the grid. In this application scenario, the trigger condition can be that when the difference between the voltage output by the inverter and the grid voltage is less than a specified threshold (for example, 30V), the inverter circuit and the grid circuit connected at both ends of the series relay are connected; when the inverter When the difference between the output voltage and the grid voltage is greater than a specified threshold, the inverter circuit connected to the two ends of the series relay and the grid circuit are disconnected. The control device can monitor the voltage of the inverter and compare it with the grid voltage to determine whether the trigger condition is met.

102. If it is determined to be yes, the control device controls the order in which the relays in the series relay group perform response operations according to preset rules, and the response operations include closing contacts or opening contacts.

When the control device determines that the trigger conditions are met, the control device can control the relays in the series relay group to perform response operations. The response operations here can include closing contacts or opening contacts. Different types of relays perform specific actions when the trigger conditions are met. Response actions are different.

Since the sequence of response operations of the relays in the series relay group in the prior art is fixed, the relays performing uncharged response operations need to perform uncharged response operations for a long time, while the relays performing live response operations need to perform live response operations for a long time. However, the air oxide film on the contact surface of the relay that has not been completely broken down for a long time will continue to accumulate, increasing the contact resistance and causing serious heating of the contacts, thereby reducing the reliability of the relay. Contacts of relays that operate with live response for a long time are melted and vaporized due to arcing and inrush current, which reduces the reliability of the relay.

In order to solve the problem of low reliability of the relays in the series relay group in the prior art, the control device in the embodiment of the present invention controls the sequence of the response operations of the relays in the series relay group according to preset rules, so that the relays in the series relay group The sequence of response operations can be flexibly set, so that the relays in the series relay group can alternately perform live response operations and non-charged response operations, without making a certain relay perform live response operations or long-term non-charged response operations . Therefore, it is possible to avoid the continuous accumulation of oxide film between the contacts of the relays that perform long-term uncharged response operations due to the response operation sequence of the relays in the fixed series relay group in the prior art, and prevent the continuous increase of resistance and affect the service life of the relays. , and can distribute the damage to the contacts caused by arc and inrush current during the live response operation to multiple relays in the series relay group, thus prolonging the life of any relay in the series relay group and improving the reliability of the series relay group. Overall reliability of any one relay as well as groups of relays in series. Therefore, it is possible to solve the problem of low reliability of relays in the prior art because the sequence of response operations of the relays in the series relay group is fixed, so that the relays perform live response operations or non-charged response operations for a long time.

Optionally, the control device controlling the order of the relays in the series relay group to perform response operations according to preset rules may include: the control device randomly arranges the respective identifiers corresponding to the relays in the series relay group, and controls the relays to perform response operations sequentially according to the arrangement order corresponding to the identifiers .

When the triggering conditions are met, the control device can randomly arrange the corresponding identifications of the relays in the series relay group. Exemplarily, the identifications here can be digital numbers, letter labels, etc. to identify the identity identification of the relay, and according to the corresponding arrangement of the identification The sequence control relays respond in sequence. Wherein, for any sequence, the control device controls the relays in the front to perform the response operation first, and the relays in the rear to perform the response operation later. And because the random arrangement process can make the probability that any relay in the series relay group is arranged to be equal to the last, that is, the probability that any relay will perform a response operation at the end is equal, thus any relay can be made to perform an electrified response operation (or an uncharged response operation). The probability of operation) is equal, so that the damage caused by the live response operation or the uncharged response operation to the contact can be allocated to each relay, so as to avoid premature damage of a certain relay, thereby improving the reliability of any relay in the series relay group.

Exemplarily, if the series relay group includes the relay K1 and the relay K2 as shown in Figure 1, wherein K1 and K2 are respectively the identifications corresponding to the two relays in the series relay group, the control device randomly arranges the specific values of K1 and K2 The method can be as follows: the control device can correspond the relay K1 to the numerical interval [0,0.5), and the relay K2 to the numerical interval [0.5,1), and when it is determined that the trigger condition is met, the control device can generate a [0,1 ) between random numbers, if the generated random number is less than 0.5, the arrangement order is K1, K2, and the control device first controls the relay K1 to perform the response operation according to the arrangement order, and then controls the relay K2 to perform the response operation; otherwise, if the generated If the random number is greater than or equal to 0.5, the arrangement order is K2 and K1. According to the arrangement order, the control device first controls the relay K2 to perform a response operation, and then controls the relay K1 to perform a response operation.

Optionally, the control device controlling the order in which the relays in the series relay group perform response operations according to a preset rule may include: the control device selects an element in a preset arrangement order set according to a preset rule, and the elements are the relays in the series relay group respectively The order in which the corresponding signs are arranged, and the order in which the relay responds to operations is controlled according to the order in which the selected elements correspond.

Specifically, the control device can preset a set of arrangement order, the elements in the set are the arrangement order of the identifications corresponding to the relays in the series relay group, and when it is determined that the trigger condition is met, the control device can select the preset The elements in the order set are arranged, so that the corresponding relays are controlled to perform response operations in sequence according to the arrangement order of the relays corresponding to the selected elements. For any sorting sequence selected, the control device controls the relays in the front to perform the response operation first, and the relays in the rear to perform the response operation afterward.

Exemplarily, if the series relay group is a series relay K1 and a relay K2 as shown in FIG. The arrangement order of the elements in the set, that is, the identifiers K1 and K2 corresponding to the relays in the series relay group can be (K1, K2) and (K2, K1) respectively. For example, when the control device selects the element (K2, K1), the relay K2 is controlled to perform a response operation first, and the relay K1 is then controlled to perform a response operation.

Exemplarily, if the series relay group includes relay K1, relay K2 and relay K3, the preset arrangement order set may be {(K1, K2, K3), (K2, K1, K3), (K3, K2, K1), (K1, K3, K2), (K2, K3, K1), (K3, K1, K2)}, when the element selected by the control device is (K2, K3, K1), it will be arranged according to the corresponding element The sequence control relay K2, relay K3, and relay K1 perform response operations in sequence.

Of course, the embodiment of the present invention does not limit the number and type of relays in the series relay group.

It should be noted that the control device can exhaust all possible arrangements of the identifiers corresponding to the relays in the series relay group by means of arrangement and combination in the preset arrangement order set, so that the control device can control the series relay group according to the arrangement order. When the relays in the series respond to the operation, the probability of any relay in the series relay group to perform the live response operation (or the uncharged response operation) can be equal, so that the damage caused by the live response operation or the non-charged response operation to the contact can be minimized. Apportioned to each relay to avoid premature failure of a certain relay, thereby improving the reliability of any relay in the series relay group.

Optionally, selecting the elements in the preset arrangement order set by the control device according to preset rules may include: when the number of times the control device controls the relay to perform response operations according to the currently selected element is equal to the number threshold, reselecting the preset arrangement order elements in the collection.

When the control device controls the response operation sequence of the relays in the series relay group according to the arrangement order corresponding to the currently selected elements, so that the sum of the times of response operations of all the relays in the series relay group is equal to the preset number threshold, the preset can be reselected Arrange the elements in the order set, so as to control the response operation sequence of the relay according to the corresponding arrangement order of the re-selected elements, so that the probability of any relay in the series relay group performing a charged response operation (or a non-charged response operation) is equal as far as possible, where The preset number of times threshold can be set according to needs, for example, it can be n times, 3*n times, etc., where n is the number of relays in the series relay group.

Or, when the control device controls the response operation order of the relays in the series relay group according to the arrangement order corresponding to the currently selected elements, so that the number of response operations of any relay is equal to the preset threshold value, the preset arrangement order set can be reselected The elements in , so as to control the response operation sequence of the relay according to the arrangement order corresponding to the reselected elements, wherein the preset number of thresholds can be set according to needs, for example, it can be 1 time, 3 times, etc.

Optionally, the control device selecting the elements in the preset arrangement order set according to preset rules may include: when the time for the control device to control the relay to perform a response operation according to the currently selected element is greater than or equal to the time threshold, reselecting the preset Sorts the elements in the set.

When the time for the control device to control the response sequence of the relays in the series relay group according to the sequence corresponding to the currently selected elements is greater than or equal to the preset time threshold (for example, it can be 1 day, which can be set according to the specific needs), it can be re-selected The elements in the preset sorting order set, so as to control the response operation sequence of the relay according to the corresponding sorting order of the re-selected elements, which can make the relay respond to the operation time according to the sorting order corresponding to any element in the preset sorting sequence set All are the same, so as to make the probability of any relay in the series relay group to perform the live response operation (or uncharged response operation) equal, so that the damage caused by the live response operation or the uncharged response operation to the contact can be allocated to each relay , to avoid premature failure of a certain relay, thereby improving the reliability of any relay in the series relay group.

Wherein, when the control device reselects the elements in the preset arrangement order set, it can randomly select an element in the set; or, it can also select an element in the set after the currently selected element, if the currently selected element is the last element in the set, then the element reselected by the control device is the first element in the set.

It should be noted that the method of selecting elements in the preset arrangement order set according to the preset rules in the embodiment of the present invention is only an example, and is not intended to limit the scope of protection.

Certainly, the control device may also use other methods to control the sequence of response operations of the relays in the series relay group, which is not limited in this embodiment of the present invention.

An embodiment of the present invention provides a control method. When the control device determines that the trigger condition of the series relay group is met, the order in which the relays in the series relay group perform response operations is controlled according to preset rules, so that the relays in the series relay group perform response operations. The sequence can be flexibly set according to the needs, so that the relays in the series relay group can alternately perform live response operation and non-charge response operation, without making a certain relay perform live response operation or long-term long-term response operation as in the prior art. No power response operation. Therefore, it can solve the problem of low reliability of the relays in the prior art because the sequence of the response operations of the relays in the series relay group is fixed, so that the relays perform the live response operation or the long-term non-charge response operation for a long time, thus prolonging the series connection The service life of any relay in the relay group improves the overall reliability of any relay and the series relay group.

Referring to FIG. 4, an embodiment of the present invention provides a control device 200, which may include:

The determination unit 201 can be used to determine whether the trigger condition of the series relay group is met, and the series relay group includes at least two relays connected in series;

The control unit 202 may be configured to, if the determination unit 201 determines yes, control the order of the relays in the series relay group to perform response operations according to preset rules, and the response operations include closing contacts or opening contacts.

Optionally, the control unit 202 may be specifically used for:

Randomly arrange the identifications corresponding to the relays in the series relay group, and control the relays to respond in sequence according to the arrangement order corresponding to the identifications.

Optionally, the control unit 202 may be specifically used for:

selecting an element in a preset arrangement order set according to a preset rule, and the element is the arrangement order of the relays in the series relay group;

Control the order in which the relay responds according to the order in which the selected elements correspond.

Optionally, the control unit 202 may be specifically used for:

When the number of response operations performed by the control relay according to the currently selected element is equal to the number threshold, the elements in the preset arrangement order set are reselected.

Optionally, the control unit 202 may be specifically used for:

When the time for controlling the relay to perform a response operation according to the currently selected element is greater than or equal to the time threshold, the elements in the preset arrangement order set are reselected.

An application scenario of the series relay group may be that one end of the series relay group is connected to the inverter, and the other end is connected to the power grid.

An embodiment of the present invention provides a control device that controls the order in which the relays in the series-connected relay group perform response operations according to preset rules when it is determined that the trigger conditions of the series-connected relay group are met, so that the order in which the relays in the series-connected relay group perform response operations The order can be flexibly set according to the needs, so that the relays in the series relay group can alternately perform live response operation and non-charge response operation, without making a certain relay perform live response operation or long-term non-charge response operation as in the prior art Response action. Therefore, it can solve the problem of low reliability of the relays in the prior art because the sequence of the response operations of the relays in the series relay group is fixed, so that the relays perform live response operations or long-term non-charged response operations, resulting in low reliability of the relays. The service life of any relay in the relay group improves the overall reliability of any relay and the series relay group.

In the several embodiments provided in this application, it should be understood that the disclosed control device and method can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may be physically included separately, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware, or in the form of hardware plus software functional units.

The above-mentioned integrated units implemented in the form of software functional units may be stored in a computer-readable storage medium. The above-mentioned software functional units are stored in a storage medium, and include several instructions to enable a computer device (which may be a personal computer, server, or network device, etc.) to execute some steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM for short), random access memory (Random Access Memory, RAM for short), magnetic disk or optical disk, and various media that can store program codes.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (12)

1. a control method, is characterized in that, comprising:

Determine whether the trigger condition meeting series relay group, described series relay group comprises at least two relays of connecting successively;

That then control relay described in described series relay group according to preset rules and carry out the order of operation response, described operation response comprises closing contact or break contact if determine.

2. method according to claim 1, is characterized in that, describedly controls according to preset rules the order that relay described in described series relay group carries out operation response and comprises:

The mark that relay described in series relay group described in random alignment is corresponding respectively, the ordering corresponding according to described mark controls described relay and carries out operation response successively.

3. method according to claim 1, is characterized in that, describedly controls according to preset rules the order that relay described in described series relay group carries out operation response and comprises:

Choose the element in default ordering set according to preset rules, described element is the ordering of the mark of the difference of relay described in described series relay group correspondence;

The ordering corresponding according to the described element chosen controls the order that described relay carries out operation response.

4. method according to claim 3, is characterized in that, the described element chosen in default ordering set according to preset rules comprises:

When control device equals frequency threshold value according to the number of times that relay described in the current described control of element chosen carries out operation response, again choose the element in default ordering set.

5. method according to claim 3, is characterized in that, the described element chosen in default ordering set according to preset rules comprises:

When control device is greater than or equal to time threshold according to the time that relay described in the current described control of element chosen carries out operation response, again choose the element in default ordering set.

6. the method according to any one of claim 1-5, is characterized in that, one end of described series relay group is connected with inverter, and the other end is connected with electrical network.

7. a control device, is characterized in that, comprising:

Determining unit, for determining whether the trigger condition meeting series relay group, described series relay group comprises at least two relays of connecting successively;

Control unit, if determine for described determining unit is, then control relay described in described series relay group according to preset rules and carry out the order of operation response, described operation response comprises closing contact or break contact.

8. control device according to claim 7, is characterized in that, described control unit specifically for:

The mark that relay described in series relay group described in random alignment is corresponding respectively, the ordering corresponding according to described mark controls described relay and carries out operation response successively.

9. control device according to claim 7, is characterized in that, described control unit specifically for:

Choose the element in default ordering set according to preset rules, described element is the ordering of the mark of the difference of relay described in described series relay group correspondence;

The ordering corresponding according to the described element chosen controls the order that described relay carries out operation response.

10. control device according to claim 9, is characterized in that, described control unit specifically for:

When the number of times carrying out operation response according to relay described in the current described control of element chosen equals frequency threshold value, again choose the element in default ordering set.

11. control device according to claim 9, is characterized in that, described control unit specifically for:

When the time of carrying out operation response according to relay described in the current described control of element chosen is greater than or equal to time threshold, again choose the element in default ordering set.

12. control device according to any one of claim 7-11, it is characterized in that, one end of described series relay group is connected with inverter, and the other end is connected with electrical network.