CN218633352U - Isolated network operation system and power generation system for waste heat power generation - Google Patents

Abstract

The utility model discloses a waste heat power generation's isolated network operating system and power generation system, including main transformer module, the trouble splitting device, isolated network steady control system and waste heat generator group module, the input through the trouble splitting device inserts main transformer module, make the trouble splitting device whether have trouble or power tripping to the outside electric wire netting that main transformer module inserts detect, the output of trouble splitting device links to each other with isolated network steady control system's input, make the trouble splitting device when detecting outside electric wire netting and have trouble or power tripping, to isolated network steady control system output isolated network signal, with the communication of establishing between isolated network steady control system and the waste heat generator group module through, send isolated network operating instruction to the waste heat generator group module, control waste heat generator group module disconnection and being connected of outside electric wire netting, with this problem of the waste heat generator power supply failure that the trouble or the power tripping of avoiding outside electric wire netting to lead to, avoid the power supply failure to produce huge loss and influence that cause.

Description

Isolated network operation system and power generation system for waste heat power generation

Technical Field

The utility model relates to a power generation system technical field especially relates to a solitary net operating system and power generation system of cogeneration.

Background

At present, a waste heat power generation facility is built in a general self-contained waste heat power plant, but the waste heat power generation facility is usually only connected with an external power grid in a grid mode, so that once the external power grid fluctuates, a power supply of the waste heat power generation facility also fluctuates along with the fluctuation, the waste heat power generation facility can be tripped when the external power grid is in fault tripping, and the power supply of the waste heat power generation facility cannot continuously supply power to a load when the external power grid is abnormally powered off, so that a large amount of energy loss and economic loss are caused.

Therefore, in the traditional technical scheme, when the external power grid is abnormally powered off or fails, the power supply of the waste heat power generation facility fails, and the waste heat power generation facility cannot continuously supply power to the load, so that the problem of huge loss and influence on production is solved.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides a waste heat power generation's isolated network operating system and power generation system, aims at solving when unusual outage or trouble takes place for the outside electric wire netting, and the mains operated of waste heat power generation facility became invalid, can not last the power supply for load to the technical problem of the huge loss and the influence that cause production.

In order to realize the above-mentioned mesh, the utility model provides a waste heat power generation's isolated network operating system, waste heat power generation's isolated network operating system includes: the system comprises a main transformer module, a fault splitting device, an isolated network stability control system and a waste heat generator set module;

the input end of the fault splitting device is connected into the main transformer module, the output end of the fault splitting device is connected with the input end of the isolated grid stable control system, and the isolated grid stable control system is in communication connection with the waste heat generator set module.

Optionally, the primary module comprises: the transformer comprises a main transformer, an incoming switch, a voltage transformer and a current transformer;

the incoming line switch, the voltage transformer and the current transformer are connected in series on an incoming end of the main transformer;

the first input end of the fault splitting device is connected to the incoming line switch, the second input end of the fault splitting device is connected to the voltage transformer, and the third input end of the fault splitting device is connected to the current transformer.

Optionally, the primary module further comprises: a wire outlet switch;

the outgoing switch is connected to the power outlet end of the main transformer in series;

and the switch control end of the isolated network stability control system is connected into the outgoing switch.

Optionally, the isolated network stability control system includes a first signal receiving module, an or circuit, a logic controller and a signal output module;

the output end of the first signal receiving module is connected with the input end of the OR circuit, the output end of the OR circuit is connected with the first input end of the logic controller, and the first output end of the logic controller is connected with the input end of the signal output module.

Optionally, the isolated network stability control system further includes a second signal receiving module and an and circuit;

the output end of the second signal receiving module is connected with the input end of the AND circuit, the output end of the AND circuit is connected with the second input end of the logic controller, and the second output end of the logic controller is connected with the input end of the signal output module.

Optionally, the isolated grid stability control system further includes: a synchronous grid-connected device;

the input end of the synchronization grid-connected device is in communication connection with the output end of the fault splitting device;

and the output end of the synchronous grid-connected device is connected with the outgoing switch.

Optionally, the isolated grid stability control system further includes: the system comprises a calculation module and a load control module;

and the output end of the computing module is connected with the input end of the load control module.

Optionally, the isolated grid operating system for cogeneration further includes: a load module;

the load module and the waste heat generator set module are connected to the outlet switch in parallel;

and the load module and the load control module are in communication connection.

Optionally, the isolated grid operating system for cogeneration further includes: an alarm module;

the alarm module is connected to the connection point of the waste heat power generation set module and the load module.

Furthermore, for realizing above-mentioned mesh ground, the utility model discloses still provide a power generation system, power generation system includes as above waste heat power generation's isolated network operating system, waste heat power generation's isolated network operating system includes: the system comprises a main transformer module, a fault splitting device, an isolated grid stability control system and a waste heat generator set module;

the input end of the fault splitting device is connected into the main transformer module, the output end of the fault splitting device is connected with the input end of the isolated network stability control system, and the isolated network stability control system is in communication connection with the waste heat generator set module.

The utility model provides a waste heat power generation's isolated network operating system, including main transformer module, the trouble splitting device, isolated network steady control system and waste heat generator set module, the input through the trouble splitting device inserts main transformer module, make the trouble splitting device can detect whether there is trouble or power tripping in the outside electric wire netting that main transformer module inserts in real time, the output of trouble splitting device links to each other with isolated network steady control system's input, make the trouble splitting device when detecting that main transformer module inserts outside electric wire netting and have trouble or power tripping, to isolated network steady control system output isolated network signal, with the communication connection through establishing between isolated network steady control system and the waste heat generator set module, send out net operation instruction to the waste heat generator set module, waste heat generator disconnection and the being connected of outside electric wire netting in the control waste heat generator set module, with this problem of avoiding the waste heat generator power supply failure that outside electric wire netting or power tripping result in to become invalid, simultaneously because of breaking off with outside electric wire netting, waste heat generator set module can continue to supply power for load module, thereby avoid the huge loss and the influence that the production caused.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an isolated network operation system for waste heat power generation of the present invention;

fig. 2 is a schematic diagram of the analysis and judgment logic of the control terminal of the power generation system outputted by the medium isolated grid stability control system of the present invention;

fig. 3 is a schematic view of a load analysis of a computing module in the isolated network stability control system of the present invention;

fig. 4 is a schematic view of a load analysis of a computing module in the isolated network stability control system of the present invention;

fig. 5 is a schematic view of a load analysis of a computing module in the isolated network stability control system of the present invention;

fig. 6 is a schematic view of the load analysis of the computing module in the isolated network stability control system of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)
		10	Main transformer module
20	Fault splitting device
		30	Isolated network stability control system
40	Waste heat power generation unit module

The realization, the function characteristics and the advantages of the utility model are further explained by combining the embodiment with reference to the attached drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, back, 8230; \8230;) are provided in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is 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" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a waste heat power generation's isolated network operating system.

In an embodiment of the present invention, as shown in fig. 1, the isolated grid operation system for cogeneration includes: the system comprises a main transformer module 10, a fault splitting device 20, an isolated grid stability control system 30 and a waste heat generator set module 40;

the input end of the fault splitting device 20 is connected to the main transformer module 10, the output end of the fault splitting device 20 is connected to the input end of the isolated grid stability control system 30, and the isolated grid stability control system 30 is in communication connection with the waste heat generator set module 40 (namely, the isolated grid stability control system 30 in fig. 1 is in communication connection with the waste heat generator #1 and the waste heat generator #2 in the waste heat generator set module 40 through the output ends 2 and 3).

In this embodiment, the main transformer module 10 is a module connected to an external power grid for supplying power to the waste heat generator set module 40, and the fault disconnection device 20 is provided by the present invention, and can realize real-time monitoring of whether there is a power trip or fault in the external power grid connected to the main transformer module 10 through the fault disconnection device 20, and send an isolated network signal to the isolated network stable control system 30 when it is monitored that there is a power trip or fault in the external power grid connected to the main transformer module 10, so as to send an isolated network operation instruction to the waste heat generator set module through the isolated network stable control system 30, and control the waste heat generator in the waste heat generator set module 40 to disconnect from the main transformer module 10, the utility model discloses a waste heat generator group module 40, including waste heat generator group module 40, the DEH system of waste heat generator group module 40, be connected with external power grid promptly, make waste heat generator group module 40 get into the isolated network running state, simultaneously, the technical transformation of DEH system is implemented to the waste heat generator in the waste heat generator group module 40, make waste heat generator get into the isolated network running state, can be promptly after the disconnection is connected with external power grid, possess the power supply function who is isolated in external power grid in the short time, in order to guarantee partial load's steady operation, when so avoiding external power grid to break down or power tripping, waste heat generator does not supply power to the load with failing that external power grid disconnection leads to, the production flow who leads to breaks down, and then the problem of the production loss who causes.

Further, the main transformer module 10 includes: the transformer comprises a main transformer, an incoming line switch, a voltage transformer and a current transformer;

the incoming line switch, the voltage transformer and the current transformer are connected in series on an incoming end of the main transformer;

a first input end (namely, an input end 1 in fig. 1) of the fault splitting device 20 is connected to the incoming line switch, a second input end (namely, an input end 2 in fig. 1) of the fault splitting device 20 is connected to the voltage transformer, and a third input end (namely, an input end 3 in fig. 1) of the fault splitting device 20 is connected to the current transformer.

Further, the main transformer module 10 further includes: a wire outlet switch;

the outlet switch is connected to the outlet end (namely the 4 output ends in fig. 1) of the main transformer in series;

and the switch control end of the isolated network stability control system 30 is connected to the outgoing switch.

In this embodiment, one main transformer is present in the main transformer module 10 for illustration, and actually, a plurality of main transformers may be included.

Referring to fig. 1, the main transformer module 10 includes an incoming switch for connecting to an external power grid, a voltage transformer indicating voltage and frequency of an incoming side of the main transformer, a current transformer indicating current of incoming power measurement of the main transformer, and an outgoing switch connected to the waste heat power generator set module 40 and configured to supply power to the waste heat power generator set module 40.

The fault disconnection device 20 has three input ends connected to the main transformer module 10, wherein a first input end monitors whether a power supply of an external power grid trips or not in real time through an incoming line switch, a second input end monitors whether a constant value of voltage and frequency input into the main transformer or not in real time through an incoming voltage transformer or not, and a third input end monitors whether a current input into the main transformer or not in real time through an incoming current transformer or not so as to judge whether the power supply trips or faults exist in the external power grid or not, a switch control end of the isolated network stability control system 30 is connected to the outgoing line switch, and when the isolated network stability control system 30 receives an isolated network signal sent by the fault disconnection device 20, the isolated network stability control system 30 sends an isolated network operation instruction to the outgoing line switch through the switch control end, so that the outgoing line switch is disconnected from a waste heat generator in the waste heat generator set module 40, and the waste heat generator set module 40 enters an isolated network operation state.

In the embodiment, the fault disconnection apparatus 20 sets the power supply trip status, voltage, frequency and current of the power supply of the main transformer by accessing the incoming line switch, the voltage transformer and the current transformer to the fixed value range and the trigger fixed value as shown in table 1.

TABLE 1

As can be seen from fig. 1 and table 1, in this embodiment, taking the main transformer in the main transformer module 10 as 110kv/10kv (i.e. converting 110kv accessed from the external power grid into 10kv and then outputting and supplying power), the protection setting value of the fault disconnection device 20 is divided into three protection actions, i.e. low voltage protection (corresponding to the low voltage disconnection setting value in table 1), low frequency protection (corresponding to the low frequency disconnection setting value in table 1), and overvoltage protection (corresponding to the overvoltage disconnection setting value).

The low-voltage separation fixed values in table 1 include (1) a low-voltage one-round monitored low-voltage fixed value with a fixed value range of 0-100.00V (i.e., the low-voltage one-round voltage fixed value in table 1), when the low voltage reaches 80V or below in the one-round monitoring process, it is determined that a fault exists in the external power grid at the time, and an isolated power grid signal is sent to the isolated power grid stability control system 30, (2) a low-voltage one-round monitored maintaining time with a fixed value range of 0-120.00 s (i.e., the low-voltage one-round time fixed value in table 1), when the maintaining time with the monitored low voltage reaches 0.12s or above in the one-round monitoring process, it is determined that a fault exists in the external power grid at the time, and an isolated power grid signal is sent to the isolated power grid stability control system 30, and (3) a low-voltage one-round monitored power state with a fixed value range of 1/0 (i.e., the low-voltage one-round switching on/off in table 1) when a low-voltage trend of the one-round monitoring process is monitored and a leading trend is detected and a fault exists, and an isolated power grid stability control system is sent to the external power grid stability control system at the time.

The low-frequency separation fixed values in table 1 include (1) a low-frequency fixed value of one round of low-frequency monitoring with a fixed value range of 46 to 50.00Hz (i.e., the low-frequency fixed value of one round in table 1), when the low frequency reaches 49.5Hz or below in the process of one round of monitoring, it is determined that a fault exists in the external power grid at this time, and an isolated power grid signal is sent to the isolated power grid stability control system 30, (2) a maintenance time of one round of low-frequency monitoring with a fixed value range of 0 to 120.00s (i.e., the low-frequency fixed value of one round in table 1), when the maintenance time of the low frequency monitored in the process of one round of monitoring reaches 0.12s or above, it is determined that a fault exists in the external power grid at this time, and an isolated power grid signal is sent to the isolated power grid stability control system 30, and (3) a low-frequency state of one round of low-frequency monitoring with a fixed value range of 1/0 (i.e., the low-frequency one round in table 1 is turned on and off), when a low-frequency trend of one round of monitoring is monitored and a leading trend is detected in the process of one round of monitoring, it is determined that a fault exists, and an isolated power grid stability control system at this time, and an external power grid signal is sent to the isolated power grid stability control system 30.

The overvoltage breakdown constant values in table 1 include (1) an overvoltage constant value for overvoltage monitoring with a constant value range of 0 to 120.00v (i.e., an overvoltage protection voltage constant value in table 1), when an overvoltage is monitored to 110v or more, it is determined that a fault exists in the external power grid at that time, and an isolated power grid signal is transmitted to the isolated power grid stable control system 30, (2) an overvoltage maintaining time constant value for overvoltage monitoring with a constant value range of 0 to 120.00v (i.e., an overvoltage protection time constant value in table 1), when an overvoltage maintaining time reaches 0.12s or more, it is determined that a fault exists in the external power grid at that time, and an isolated power grid signal is transmitted to the isolated power grid stable control system 30, (3) an overvoltage state with a constant value range of 1/0 (i.e., an overvoltage protection in table 1 is turned on or off), when an overvoltage monitoring approaches 1 and has an advance trend, it is determined that a fault exists in the external power grid at that time, and it is transmitted to the isolated power grid stable control system 30, and (4) an overvoltage gate state (i.e., an overvoltage protection/trip alarm in table 1), and when an overvoltage trip state is monitored, and an overvoltage trip signal is transmitted to the isolated power grid stable control system 30.

Specifically, as can be seen from fig. 2, the isolated grid stability control system 30 includes a first signal receiving module, or circuit (i.e. greater than or equal to 1 in fig. 2), a logic controller and a signal output module;

the output end of the first signal receiving module is connected with the input end of the OR circuit (namely, more than or equal to 1 in the figure 2), the output end of the OR circuit (namely, more than or equal to 1 in the figure 2) is connected with the first input end (namely, S in the figure 2) of the logic controller, and the first output end of the logic controller is connected with the input end of the signal output module.

Further, the isolated network stability control system 30 further comprises a second signal receiving module and an and circuit (i.e., &infig. 2);

the output terminal of the second signal receiving module is connected to the input terminal of the and circuit (i.e., &infig. 2), the output terminal of the and circuit (i.e., &infig. 2) is connected to the second input terminal of the logic controller (i.e., R in fig. 2), and the second output terminal of the logic controller is connected to the input terminal of the signal outputting module.

According to fig. 2, the isolated grid stability control system 30 includes a first signal receiving module and a second signal receiving module for analyzing and judging the current state of the power generation system, wherein the information received by the first signal receiving module includes whether 10kv reverse power is off-load, whether 110kv reverse power is off-load, whether 10kv main transformer low-voltage side switch is off-trip-grid, whether 110kv switch is off-trip-grid, whether the fault disconnection device 20 sends an isolated grid signal, and whether the power generation system turbine speed bottom enters into the isolated grid, when the or circuit (i.e. more than or equal to 1 in fig. 2) receives the above-mentioned any judgment information (i.e. whether 10kv reverse power is off-load-ON, whether 110kv reverse power is off-load-ON, whether 10kv main transformer low-voltage side switch is off-trip-grid-ON, whether the fault disconnection device 20 sends an isolated grid signal-ON or whether the power generation system turbine speed bottom enters into the isolated grid-ON), and the fault disconnection device sends the judgment information to the first logical control device (i.e. the power generation system output end of the isolated grid control module and the current system output end of the power generation system is in the state of the isolated grid.

Taking fig. 1 as an example, two waste heat generators, namely #1 waste heat generator and #2 waste heat generator, exist in the waste heat generator set module 40, and the signals output to the control terminal of the power generation system by the signal output module are #1 waste heat generator isolated network operation instruction 1 and #2 waste heat generator isolated network operation instruction 1.

In addition, the information received by the second signal receiving module includes whether isolated network fast-switching interlock is put into and whether isolated network state is reset, when the circuit (namely &infig. 2) receives the judgment information (namely whether isolated network fast-switching interlock is put into-OFF and whether isolated network state is reset-ON) of the isolated network fast-switching interlock which is output by the second signal receiving module, the judgment information is sent to the second input end (namely R in fig. 2) in the logic controller, the signal output module is controlled by the second output end of the logic controller to send the signal information that the waste heat generator set module 40 is connected with the external power grid at the moment (namely #1 waste heat generator isolated network operation instruction 2 and #2 waste heat generator isolated network operation instruction 2) to the control terminal of the power generation system, and the whole power generation system is connected with the external power grid and the outgoing switch of the main transformer is in a closed state, so that the power generation state of the current power generation system is displayed to a user.

Further, the isolated grid stability control system 30 further includes: a synchronous grid-connected device;

the input end of the synchronization grid-connected device is in communication connection with the output end of the fault splitting device 20;

and the output end of the synchronous grid-connected device is connected with the outgoing switch.

The synchronous grid-connected device in the isolated grid stability control system 30 is used for controlling the outlet switch to be switched on through the synchronous grid-connected device when the fault disconnection device 20 detects that the power supply of the external power grid is switched on or the fault is eliminated, so that the waste heat power generation unit module 40 is connected with the external power grid again, and the full load is connected to the external power grid again to perform a normal operation state.

Specifically, as can be seen from fig. 3 to 6, the isolated grid stability control system 30 further includes: the device comprises a calculation module and a load control module;

and the output end of the computing module is connected with the input end of the load control module.

Fig. 3 to 6 are load analysis diagrams of a calculation module, where fig. 3 is a calculation flow chart of the calculation module calculating a main incoming line power average value and a total power of a turbo generator, specifically, the calculation module obtains an active power at a low-pressure side of a 10kv main transformer and an active power at a 110kv main transformer, and sends the two powers to a DIV _ Q (average value calculation) to calculate and output the main incoming line power average value, and the calculation module obtains a generator power of a #1 waste heat generator and a generator power of a #2 waste heat generator, and sends the two powers to an ADD (additive calculation) to calculate and output the total power of the turbo generator, so as to obtain the main incoming line power average value and the total power value of the turbo generator.

When the power generation system enters the isolated network state, that is, when the waste heat generator in the waste heat generator set module 40 enters the isolated network state, the power supply of the waste heat generator is not enough to maintain the operation of all loads, so that in order to ensure the operation of important loads, non-important loads need to be cut, so that fig. 4 to 6 show that the isolated network stability control system 30 can ensure the stable operation of important loads by calculating how many loads need to be cut at this time through the calculation module.

Firstly, when the calculation module judges that the power generation system at the moment enters the isolated power grid state (namely whether the power generation system enters the isolated power grid state-ON), the calculation module sends judgment information of whether the power generation system enters the isolated power grid state-ON to the SEL, calculates the average value of the input main incoming line power based ON the confirmation state of the SEL (confirmation), obtains the amount of the load to be switched of the power generation system at the moment, sends the obtained load value to the load control module, controls the running state of the load connected to the load module according to the priority through the load control module, and controls the load through the disconnection of the load connected to the load module.

Fig. 5 is a diagram illustrating a load to be switched when the #1 waste heat generator enters an isolated network state, where the calculation module first sends a determination message that the #1 waste heat generator has been connected to the grid-OFF when determining that the #1 waste heat generator enters the isolated network state (that is, the #1 waste heat generator has been connected to the grid-OFF), calculates the #1 waste heat generator power in the input total power value of the steam turbine generator based on the determination state of the SEL (determination), and sends the obtained load to a load control module after obtaining the load to be switched when the #1 waste heat generator enters the isolated network state, and the load control module controls the operation state of the load connected to the load module according to the priority, and controls the load by switching OFF the load connected to the #1 waste heat generator on the load module.

Fig. 6 is a diagram illustrating a load to be switched when the #2 waste heat generator enters an isolated network state, where the calculation module first sends a determination message that the #2 waste heat generator has been connected to the network-OFF when determining that the #2 waste heat generator enters the isolated network state (i.e., the #2 waste heat generator has been connected to the network-OFF), calculates the #2 waste heat generator power in the input total power value of the steam turbine generator based on the determination state of the SEL (determination), and sends the obtained value of the switched load to the load control module after obtaining how much the switched load of the #2 waste heat generator enters the isolated network state, and the load control module controls the operating state of the load connected to the load module according to the priority, and the load connected to the #2 waste heat generator on the load module is switched OFF, so as to control the load.

It should be noted that, in the control process in which the load control module controls the operating state of the load connected to the load module according to the priority, the load priority is preset in the power generation system, and the corresponding load is cut off according to the low-high priority until the load value to be cut is met.

Further, the isolated grid operation system for cogeneration also comprises: a load module;

the load module and the waste heat generating set module 40 are connected on the outlet switch in parallel;

the load module is in communication connection with the load control module (that is, the load control module in the isolated network stability control system 30 in fig. 1 is in communication connection with the load control module through the output end 1).

The load module is connected with a plurality of loads, the load module supplies power for the connected loads through a waste heat generator connected to the waste heat generator set module 40, meanwhile, the load module is in communication connection with the load control module, the operation state of the load connected to the load module is controlled based on the load control module, when the power generation system enters an isolated network state, stable operation of important loads needs to be guaranteed, interruption of a production flow caused by power supply failure of the important loads is avoided, and abnormal influence on production is avoided.

Further, the isolated grid operation system for cogeneration also comprises: an alarm module;

the alarm module is connected to the connection point of the waste heat power generation unit module 40 and the load module.

When an external power grid fails, if the waste heat generator set module 40 does not enter the isolated power grid state in time, a user can be informed in time, and therefore the problem that when the waste heat generator set module 40 fails to serve as a power supply to supply power to important loads due to failure or other conditions, the user cannot know that power failure time of the important loads is too long, and accordingly heavy loss is caused is avoided.

This embodiment still provides a power generation system, power generation system includes as above waste heat power generation's isolated network operating system, waste heat power generation's isolated network operating system includes: the system comprises a main transformer module 10, a fault disconnection device 20, an isolated grid stability control system 30 and a waste heat generator set module 40;

the input end of the fault splitting device 20 is connected to the main transformer module 10, the output end of the fault splitting device 20 is connected to the input end of the isolated grid stability control system 30, and the isolated grid stability control system 30 is in communication connection with the waste heat generator set module 40.

The above is only the optional embodiment of the utility model discloses a not consequently restriction the patent scope of the utility model, all be in the utility model discloses a under the design, utilize the equivalent structure transform that the content of the description and the attached drawing was made, or direct/indirect application all includes in other relevant technical field the utility model discloses a patent protection is within range.

Claims (10)

1. The isolated power grid operation system for waste heat power generation is characterized by comprising: the system comprises a main transformer module, a fault splitting device, an isolated grid stability control system and a waste heat generator set module;

the input end of the fault splitting device is connected into the main transformer module, the output end of the fault splitting device is connected with the input end of the isolated network stability control system, and the isolated network stability control system is in communication connection with the waste heat generator set module.

2. The cogeneration israyed system of claim 1, wherein said main transformer module comprises: the transformer comprises a main transformer, an incoming line switch, a voltage transformer and a current transformer;

the incoming line switch, the voltage transformer and the current transformer are connected in series on an incoming end of the main transformer;

the first input end of the fault splitting device is connected to the incoming line switch, the second input end of the fault splitting device is connected to the voltage transformer, and the third input end of the fault splitting device is connected to the current transformer.

3. The cogeneration islanded system of claim 2 wherein said primary module further comprises: a wire outlet switch;

the outgoing switch is connected to the power output end of the main transformer in series;

and the switch control end of the isolated network stability control system is connected into the outgoing switch.

4. The isolated network operation system for generating power by using waste heat according to claim 3, wherein the isolated network stability control system comprises a first signal receiving module, an OR circuit, a logic controller and a signal output module;

the output end of the first signal receiving module is connected with the input end of the OR circuit, the output end of the OR circuit is connected with the first input end of the logic controller, and the first output end of the logic controller is connected with the input end of the signal output module.

5. The isolated network operation system for generating power by using waste heat according to claim 4, wherein the isolated network stability control system further comprises a second signal receiving module and an AND circuit;

the output end of the second signal receiving module is connected with the input end of the AND circuit, the output end of the AND circuit is connected with the second input end of the logic controller, and the second output end of the logic controller is connected with the input end of the signal output module.

6. The isolated grid operating system for cogeneration of claim 5, wherein said isolated grid stability control system further comprises: a synchronous grid-connected device;

the input end of the synchronous grid-connected device is in communication connection with the output end of the fault splitting device;

and the output end of the synchronous grid-connected device is connected with the outgoing switch.

7. The isolated grid operating system for cogeneration of claim 6, wherein said isolated grid stability control system further comprises: the device comprises a calculation module and a load control module;

and the output end of the computing module is connected with the input end of the load control module.

8. The cogeneration isolated grid operating system of claim 7, further comprising: a load module;

the load module and the waste heat generator set module are connected to the outlet switch in parallel;

and the load module and the load control module are in communication connection.

9. The cogeneration isolated grid operating system of claim 8, wherein said cogeneration isolated grid operating system further comprises: an alarm module;

the alarm module is connected to the connection point of the waste heat power generation set module and the load module.

10. A power generation system comprising a cogeneration isolated grid operating system according to any one of claims 1 to 9.

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