Building power supply and distribution system and method based on power demand side response

Abstract

The invention discloses a building power supply and distribution system and method based on power demand side response, and the system is provided with a power demand response management system, and after the power demand response management system receives a power grid demand side response signal, the power grid demand side response signal is received according to the demand response capacity. A power grid permitted operation mode (a diesel generating set grid-connected mode or an isolated island operation mode) is adopted, a diesel generating set and a mains supply are started to operate at the same time, peak clipping of the power grid in the peak period is achieved, and the purpose of power demand side response is achieved; by arranging a power supply connection special device, the electric power demand response management system controls and realizes simultaneous operation of the diesel generating set and the commercial power supply. The existing diesel generating set is subjected to limited transformation to become a distributed power supply participating in power demand side response, peak clipping of the peak period of the power grid is achieved, and the effective utilization rate of the diesel generating set is improved.

Description

Technical Field

[0001] The present application relates to the technical field of building power supply and distribution, and specifically to a building power supply and distribution system and method based on power demand side response. Background Art

[0002] The increasingly frequent extreme weather has led to a surge in electricity demand, and the unpredictable abnormal climate has led to insufficient output of hydropower and new energy, resulting in a large gap in electricity supply. In response to this extraordinary situation, power supply departments in various regions have introduced relevant policies to encourage power users to give full play to the potential of user-side resources, actively participate in the demand-side response of the power market, and meet the peak power demand during peak hours.

[0003] For civil buildings, it is a common solution to set up self-provided diesel generator sets as backup / emergency power sources according to fire protection needs. However, as a backup power source, diesel generator sets will only be put into operation after the city power outage to provide power for security and important loads, and their utilization rate is very low. Summary of the invention

[0004] In order to solve the abnormal problem of tight power supply in the power grid under extreme weather conditions, this application proposes a building power supply and distribution system and method based on power demand side response, which makes full use of idle self-contained diesel generator sets in civil buildings, participates in the market-oriented response on the power demand side, meets the peak load demand of the power grid during peak hours, and improves the resilience of supply and demand of urban power grids.

[0005] This application is implemented through the following technical solutions:

[0006] A building power supply and distribution system based on power demand side response, the building power supply and distribution system comprising: a diesel generator set, a diesel generator set controller, a low voltage power distribution system, a power connection dedicated device, a power connection dedicated device controller and a power demand response management system;

[0007] The power connection device is connected to the busbar in the low-voltage power distribution system through a mains connection switch, and the power connection device is connected to the diesel generator busbar through a diesel generator power connection switch, and the diesel generator busbar is connected to the power output end of the diesel generator set;

[0008] The busbars in the low-voltage power distribution system are connected to the building load reduction through a number of controllable switches, the busbars in the low-voltage power distribution system are connected to the low-voltage side of the transformer through the mains switch, and the high-voltage side of the transformer is connected to the mains power supply;

[0009] The power demand response management system is used to receive power demand response signals in real time, and the power demand response management system is used to output control signals to control the opening / closing actions of the mains switch, the mains connection switch, the diesel generator power connection switch and the controllable switch, and output control signals to control the diesel generator set controller and the power connection dedicated device controller to perform corresponding control;

[0010] The diesel generator set controller is used to control the start, stop and operation of the diesel generator set, and the power connection dedicated device controller is used to control the power connection dedicated device to achieve the connection and disconnection of the diesel generator set and the mains power supply.

[0011] In some embodiments, the building power supply and distribution system further comprises: a reverse power detection device;

[0012] The inlet end of the mains switch is connected to the low-voltage side of the transformer, the outlet end of the mains switch is provided with a first current transformer and a second current transformer, the signal output end of the first current transformer is connected to the signal input end of the reverse power detection device, the signal output end of the reverse power detection device is connected to the power demand response management system, and the reverse power detection device outputs a reverse power signal to the power demand response management system when detecting a reverse power signal;

[0013] The signal output end of the second current transformer is connected to the power connection dedicated device controller.

[0014] In some implementations, the power demand response management system is further configured to receive a voltage signal from the mains switch power supply side in real time to detect an islanding signal.

[0015] In some embodiments, when the power demand response management system receives the power demand side response signal, it controls the controllable switch to open the switch to reduce the load or outputs a control signal to the diesel generator set controller to start the diesel generator set according to the demand response capacity output control signal.

[0016] In some embodiments, the power connection dedicated device controller detects the voltage and frequency signals at the incoming end of the AC power connection switch, and outputs a control signal to control the diesel generator set controller to adjust the voltage and frequency of the diesel generator set to synchronize with the AC power supply.

[0017] In some embodiments, the power connection dedicated device controller obtains power quality data by detecting the voltage signal at the incoming end of the AC power connection switch and the current signal of the second current transformer, and selects whether to perform power quality management according to the power demand side response operation mode.

[0018] On the other hand, the present application proposes a building power supply and distribution method based on power demand side response, the building power supply and distribution method is implemented based on the above-mentioned building power supply and distribution system, and the power supply and distribution method includes:

[0019] The power demand response management system receives the power demand side response signal in real time; when there is no power demand side response signal, the power supply and distribution system and the diesel generator set operate according to the conventional system; when there is a power demand side response signal:

[0020] When the demand response capacity can be met by load reduction, the power demand response management system determines the load reduction loop according to the demand response capacity and the load priority order, and outputs a corresponding control signal to control the controllable switch to open;

[0021] When the demand response capacity is greater than the total capacity of the interruptible load, the power demand response management system outputs a control signal to control the diesel generator set controller to start the diesel generator set, control the mains connection switch and the diesel generator power connection switch to close, and control the power connection dedicated device and the power connection dedicated device controller to participate in the power demand side response. At this time, there are two operating modes:

[0022] When the power grid allows the distributed power source to be connected to the grid, the diesel generator set and the mains power supply are used in the grid-connected operation mode;

[0023] When the power grid does not allow the distributed power source to be connected to the grid, the diesel generator set and the mains power supply power mutual assistance mode is adopted, or the diesel generator set island operation mode is adopted.

[0024] In some embodiments, the building power supply and distribution method further comprises:

[0025] The reverse power signal is received in real time by the power demand response management system, and the operation of the power supply and distribution system is controlled according to the operation mode agreed with the power grid:

[0026] When the DGs are allowed to access the grid with reverse power during demand response, only the reverse power signal is detected;

[0027] When the distributed power source is not allowed to access the grid with reverse power during the demand response period, once a reverse power signal is detected, the power demand response management system outputs a control signal within a preset time to control the mains switch to open, and the diesel generator set switches to island operation.

[0028] In some embodiments, the building power supply and distribution method further comprises:

[0029] The power demand response management system receives a fire signal in real time, and once the fire signal is received, outputs a control signal to control the diesel generator power connection switch to open, so that the diesel generator set switches to island operation;

[0030] And / or, the power demand response management system detects the mains voltage signal in real time. When the mains power fails, the power demand response management system outputs a control signal to control the diesel generator power connection switch or the mains switch to open, and the diesel generator set switches to island operation.

[0031] In some embodiments, the building power supply and distribution method further comprises:

[0032] When the power demand side response signal ends, the power demand response management system outputs a control signal to control the mains connection switch and the diesel generator power connection switch to open. After a delay period, the power demand response management system outputs a control signal to control the diesel generator set controller to shut down the diesel generator set.

[0033] The application proposes a building power supply and distribution system and method based on power demand side response, which makes full use of idle self-provided diesel generator sets in civil buildings, participates in the market-oriented response of power demand side, meets the peak load demand of power grid during peak hours, solves the abnormal problem of power grid power supply shortage under extreme weather conditions, and improves the resilience of urban power grid supply and demand;

[0034] The present application proposes a building power supply and distribution system and method based on power demand side response, which sets up a power demand response management system. When the power demand response management system receives the power grid demand side response signal, it adopts the operation mode permitted by the power grid according to the demand response capacity, starts the diesel generator set and the mains power supply to run at the same time, realizes the peak shaving of the power grid during the peak period, and achieves the purpose of power demand response; by setting up a special power connection device, the power demand response management system controls the diesel generator set and the mains power supply to run at the same time;

[0035] The present application proposes a building power supply and distribution system and method based on power demand side response. By making limited modifications to existing diesel generator sets, the existing generator sets are made into distributed power sources that participate in power demand side response, thereby achieving peak shaving during peak hours of the power grid and improving the effective utilization rate of the diesel generator sets. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings described herein are used to provide a further understanding of the embodiments of the present application, constitute a part of the present application, and do not constitute a limitation on the embodiments of the present application. In the drawings:

[0037] Figure 1A schematic diagram of the structure of a building power supply and distribution system proposed in an embodiment of the present application;

[0038] Figure 2 An example of the internal structure of the dedicated power connection device for the operation mode proposed in the embodiment of the present application is as follows;

[0039] Figure 3 This is an example of the internal structure of the dedicated power connection device in operating mode 2 proposed in the embodiment of the present application. DETAILED DESCRIPTION

[0040] Hereinafter, the term "include" or "may include" used in various embodiments of the present application indicates the presence of the invented function, operation or element, and does not limit the addition of one or more functions, operations or elements. In addition, as used in various embodiments of the present application, the terms "include", "have" and their cognates are intended only to indicate specific features, numbers, steps, operations, elements, components or a combination of the foregoing items, and should not be understood as first excluding the presence of one or more other features, numbers, steps, operations, elements, components or a combination of the foregoing items or the possibility of adding one or more features, numbers, steps, operations, elements, components or a combination of the foregoing items.

[0041] In various embodiments of the present application, the expression "or" or "at least one of A or / and B" includes any combination or all combinations of the words listed at the same time. For example, the expression "A or B" or "at least one of A or / and B" may include A, may include B, or may include both A and B.

[0042] The expressions (such as "first", "second", etc.) used in the various embodiments of the present application may modify the various constituent elements in the various embodiments, but may not limit the corresponding constituent elements. For example, the above expressions do not limit the order and / or importance of the elements. The above expressions are only used for the purpose of distinguishing one element from other elements. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, without departing from the scope of the various embodiments of the present application, the first element may be referred to as the second element, and similarly, the second element may also be referred to as the first element.

[0043] It should be noted that if it is described that one component element is “connected” to another component element, the first component element may be directly connected to the second component element, and a third component element may be “connected” between the first component element and the second component element. Conversely, when one component element is “directly connected” to another component element, it can be understood that there is no third component element between the first component element and the second component element.

[0044] The terms used in the various embodiments of the application are only used to describe the purpose of specific embodiments and are not intended to limit the various embodiments of the application. As used herein, the singular form is intended to also include the plural form, unless the context clearly indicates otherwise. Unless otherwise limited, all terms used here (including technical terms and scientific terms) have the same meaning as the meanings commonly understood by ordinary technicians in the field of the various embodiments of the application. The terms (such as the terms defined in the dictionary generally used) will be interpreted as having the same meaning as the contextual meaning in the relevant technical field and will not be interpreted as having an idealized meaning or an overly formal meaning, unless clearly defined in the various embodiments of the application.

[0045] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with examples and drawings. The illustrative implementation scheme of the present application and its description are only used to explain the present application and are not intended to limit the present application.

[0046] Example:

[0047] In response to the abnormal problem of tight power supply in the power grid under extreme weather conditions, and taking into account the low utilization rate of self-provided diesel generator sets in civil buildings, this embodiment proposes a building power supply and distribution system based on power demand side response. The building power supply and distribution system proposed in this embodiment uses idle diesel generator sets in civil buildings as distributed power sources for demand response during peak power consumption periods in extreme weather conditions. By establishing a power supply and distribution system in which diesel generator sets and municipal power operate simultaneously, the demand side response of the power grid is achieved, and a large number of idle standby diesel generator sets in civil buildings are effectively utilized to improve the resilience of urban power grid supply and demand. At the same time, for existing buildings, limited modifications to existing diesel generator sets can make them distributed power sources participating in power demand side response, solving the problem of power grid peak shaving and improving the utilization rate of diesel generator sets.

[0048] like Figure 1 As shown, the building power supply and distribution system proposed in this embodiment includes a diesel generator set and its controller C G , diesel generator power connection switch QA2, mains connection switch QA1, mains switch QA3, reverse power detection device RP, ~380V low-voltage power distribution system, power connection dedicated device and controller C C , electricity demand response management system EDMS.

[0049] Among them, the power output end of the diesel generator set is connected to the diesel generator bus, the diesel generator bus is connected to the power connection dedicated device through the diesel generator power connection switch QA2, and the power connection dedicated device is connected to the ~380V low-voltage distribution system through the mains connection switch QA1.

[0050] The ~380V low voltage power distribution system includes a ~380V busbar, which is connected to the ~380V busbar through a number of controllable switches QA load The connected building can reduce the load. The ~380V bus is connected to the low-voltage side of the 10kV / 0.4kV transformer through the mains switch QA3, and the high-voltage side of the 10kV / 0.4kV transformer is connected to the mains power supply.

[0051] The outlet end of the mains switch QA3 is provided with a current transformer BC1 and a current transformer BC2. The signal output end of the current transformer BC1 is connected to the signal input end 1 of the reverse power detection device RP. The signal output end 2 of the reverse power detection device RP is connected to the signal input end I1 of the power demand response management system EDMS. The signal output end of the current transformer BC2 is connected to the power connection dedicated device controller C. C The signal input terminal 2.

[0052] The incoming line end of the mains switch QA3 is connected to the signal input end I2 of the power demand response management system EDMS. The power demand response management system EDMS receives the voltage signal of the power supply side of the mains switch QA3 in real time for detecting the island signal.

[0053] Power connection dedicated device controller C C The signal input terminal 3 is connected to the incoming line terminal of the mains connection switch QA1, and the power supply is connected to the dedicated device controller C C The control signal output terminal 4 is connected to the diesel generator controller C G The signal input terminal 1.

[0054] The control signal output terminal Q1 of the power demand response management system EDMS is connected to the signal control terminal of the mains switch QA3; the control signal output terminal Q2 of the power demand response management system EDMS is connected to the controllable switch QA load The signal control end of the power demand response management system EDMS; the control signal output end Q3 of the power demand response management system EDMS is connected to the signal control end of the mains connection switch QA1; the control signal output end Q4 of the power demand response management system EDMS is connected to the power supply connection dedicated device controller C C The signal input terminal 1 of the power demand response management system EDMS is connected to the signal control terminal of the diesel generator power connection switch QA2; the control signal output terminal Q6 of the power demand response management system EDMS is connected to the diesel generator controller C G signal input terminal 2 of the power demand response management system EDMS; signal input terminal I3 of the power demand response management system EDMS is connected to the signal terminal of the fire I / O module; signal input terminal I4 of the power demand response management system EDMS is connected to the power demand side response signal device.

[0055] The power demand response management system EDMS receives the power demand side response signal through the signal input terminal I4, and outputs a control signal from the control signal output terminal Q2 to control the controllable switch QA according to the demand response capacity. load The opening of the gate, or outputting the control signal from the control signal output terminal Q6 to the diesel generator controller C G The signal input terminal 2 starts the diesel generator set.

[0056] Power connection dedicated device controller C C By detecting the voltage and frequency signals of the incoming line end of the mains connection switch QA1, the control signal can be output to the diesel generator controller C through its control signal output terminal 4. G The signal input terminal 1 is used to adjust the voltage and frequency of the diesel generator set to synchronize with the mains power supply.

[0057] Power connection dedicated device controller C C By detecting the voltage signal at the incoming end of the mains connection switch QA1 and the current signal of the current transformer BC2, the power quality data can be obtained, and whether to perform power quality management can be selected according to the power demand side response operation mode.

[0058] The electricity demand response management system EDMS receives the fire signal of the fire I / O module through the signal input terminal I3 during the demand response period. After receiving the fire signal, the control signal is output through the control signal output terminal Q5 to control the diesel generator power connection switch QA2 to open, thereby controlling the diesel generator set to be disconnected from the dedicated power connection device.

[0059] The electric power demand response management system EDMS detects the mains voltage signal in real time through the signal input terminal I2 during the demand response period. When the mains power fails, the control signal output terminal Q5 outputs a control signal to control the diesel generator power connection switch QA2 to open, or the control signal output terminal Q1 outputs a control signal to control the mains switch QA3 to open, and the diesel generator set switches to island operation.

[0060] In the power supply and distribution system proposed in this embodiment, after receiving the power demand response signal, the power demand response management system EDMS adopts the operation mode permitted by the power grid according to the demand response capacity, starts the diesel generator set and the AC power supply to operate simultaneously, so as to realize peak shaving during the peak period of the power grid and achieve the purpose of power demand response; the reverse power detection device RP detects the reverse power in real time after the diesel generator set is running simultaneously, and for the system in which the power grid does not allow the reverse power of the distributed power source to go up, when the reverse power detection device RP detects the reverse power, the power demand response management system EDMS decides to execute the anti-reverse flow plan.

[0061] Based on the above power supply and distribution system, this embodiment also proposes a building power supply and distribution method based on power demand side response, and the building power supply and distribution method includes the following steps:

[0062] The power demand response management system EDMS receives power demand response signals in real time. When there is no power demand response signal, the low-voltage distribution system and diesel generator set operate as a conventional system; when there is a power demand response signal:

[0063] When the demand response capacity can be met by load reduction, the power demand response management system EDMS determines the required load reduction circuit according to the demand response capacity and the load priority order, and controls the controllable switch QA accordingly with the output control signal. load Open the gate;

[0064] When the demand response capacity is greater than the total interruptible load capacity, the power demand response management system EDMS outputs a control signal to the diesel generator controller C G Start the diesel generator set, control the mains connection switch QA1 and the diesel generator power connection switch QA2 to close, and control the power connection dedicated device and controller C C Participate in power demand side response. There are two operating modes:

[0065] Operation mode 1: When the grid allows distributed power sources to be connected to the grid, the diesel generator set and the mains grid connection operation mode are adopted. In this mode, the power supply is connected to the dedicated device controller C C By detecting the voltage and frequency signals at the input end of the mains connection switch QA1, the frequency and voltage of the diesel generator set are adjusted to be synchronized with the mains power supply, and the power supply connection dedicated device realizes the grid-connected operation of the diesel generator set and the mains power supply. In an optional embodiment, the power supply connection dedicated device can use a grid-connected switch to realize the grid-connected operation of the diesel generator set and the mains power supply, as shown in the following example. Figure 2 As shown, the power connection device may include a grid-connected switch QA4, wherein the inlet of the grid-connected switch QA4 is connected to the diesel generator power connection switch QA2, and the outlet of the grid-connected switch QA4 is connected to the mains power connection switch QA1.

[0066] Power connection dedicated device controller C C The control signal from the power demand response management system EDMS is received through the signal input terminal 1 to control the synchronization of the diesel generator set with the mains power supply. After the synchronization control is completed, the control signal is output to control the grid-connected switch QA4 to close, that is, the diesel generator set and the mains power supply are connected to the grid. It should be noted that Figure 2What is shown is only an exemplary description and does not limit the specific structure of the dedicated power connection device. In other optional implementations, other structures can also be used as long as the diesel generator set and the mains power supply can be connected to the grid.

[0067] Operation mode 2: When the power grid does not allow the distributed power supply to be connected to the grid, the diesel generator set and the mains power supply are used in a power mutual assistance mode. In this mode, the power supply is connected to the dedicated device controller C C Receive the control signal of the power demand response management system EDMS, and control the diesel generator set to output power and capacity that meet the power demand response requirements. In an optional implementation, the power connection dedicated device can use an isolation switch and a converter to realize the power mutual assistance mode operation of the diesel generator set and the mains power supply, as shown in the following example. Figure 3 As shown, the power connection dedicated device may include a mains power supply isolating switch QB1, a diesel generator set power supply isolating switch QB2, a diesel generator set side bidirectional power converter AC / DC, and a mains power supply side bidirectional power converter AC / DC. Among them, the incoming line end of the mains power supply isolating switch QB1 is connected to the mains power supply connection switch QA1, the outgoing line end of the mains power supply isolating switch QB1 is connected to the AC side of the mains power supply side bidirectional power converter AC / DC, the incoming line end of the diesel generator set power supply isolating switch QB2 is connected to the diesel generator power supply connection switch QA2, the outgoing line end of the diesel generator set power supply isolating switch QB2 is connected to the AC side of the diesel generator set side bidirectional power converter AC / DC, and the DC side of the mains power supply side bidirectional power converter AC / DC is connected to the DC side of the diesel generator set side bidirectional power converter AC / DC through a DC bus. The mains power supply isolating switch QB1 and the diesel generator set power supply isolating switch QB2 are closed at ordinary times and are opened only when the power connection dedicated device needs to be repaired.

[0068] Power connection dedicated device controller C C The signal input terminal 1 receives the control signal from the power demand response management system EDMS, and the power supply is connected to the dedicated device controller C C The output control signal controls the AC / DC output of the bidirectional power converter connecting the diesel generator set and the mains power supply to meet the power and capacity required by the power demand side response. Figure 3 What is shown is only an exemplary description and does not limit the specific structure of the dedicated power connection device. In other optional implementations, other structures can also be used as long as the diesel generator set and the AC power supply can be operated in a power mutual assistance mode.

[0069] Furthermore, the building power supply and distribution method proposed in this embodiment also includes:

[0070] The power demand response management system EDMS receives the output signal of the reverse power detection device RP in real time, and controls the operation of the power supply and distribution system according to the operation mode agreed with the power grid:

[0071] When the DG is allowed to access the grid with reverse power during the demand response period, the reverse power detection device RP only detects the reverse power signal;

[0072] When the distributed power source is not allowed to access the grid in reverse function during the demand response period, once the reverse power detection device RP detects the reverse power signal, the power demand response management system EDMS outputs a control signal within the specified time to control the mains switch QA3 to open the gate, and the diesel generator set switches to island operation.

[0073] Furthermore, the building power supply and distribution method proposed in this embodiment also includes:

[0074] The electricity demand response management system EDMS detects the mains voltage signal in real time. When the mains power fails, the electricity demand response management system EDMS outputs a control signal to control the diesel generator power connection switch QA2 or the mains switch QA3 to open, and the diesel generator set switches to island operation.

[0075] Furthermore, the building power supply and distribution method proposed in this embodiment also includes:

[0076] The fire signal from the fire I / O module is received in real time through the power demand response management system EDMS. Once the fire signal is received, the output control signal controls the diesel generator power connection switch QA2 to open, and the diesel generator set switches to island operation to ensure reliable power supply for the fire load.

[0077] Furthermore, the building power supply and distribution method proposed in this embodiment also includes:

[0078] When the power demand side response signal ends, the power demand response management system EDMS outputs a control signal to control the mains connection switch QA1 and the diesel generator power connection switch QA2 to open. After a delay, the power demand response management system EDMS outputs a control signal to the diesel generator controller C G Shut down the diesel generator set.

[0079] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the present application in detail. It should be understood that the above description is only the specific implementation method of the present application and is not intended to limit the scope of protection of the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A building power supply and distribution system based on power demand side response, characterized in that: The building power supply and distribution system comprises: a diesel generator set, a diesel generator set controller, a low-voltage power distribution system, a power connection device, a power connection device controller and a power demand response management system; The power connection device is connected to the busbar in the low-voltage power distribution system through a mains connection switch, and the power connection device is connected to the diesel generator busbar through a diesel generator power connection switch, and the diesel generator busbar is connected to the power output end of the diesel generator set; The busbars in the low-voltage power distribution system are connected to the building load reduction through a number of controllable switches, the busbars in the low-voltage power distribution system are connected to the low-voltage side of the transformer through the mains switch, and the high-voltage side of the transformer is connected to the mains power supply; The power demand response management system is used to receive power demand response signals in real time, and the power demand response management system is used to output control signals to control the opening / closing actions of the mains switch, the mains connection switch, the diesel generator power connection switch and the controllable switch, and output control signals to control the diesel generator set controller and the power connection dedicated device controller to perform corresponding control; The diesel generator set controller is used to control the start, stop and operation of the diesel generator set, and the power connection dedicated device controller is used to control the power connection dedicated device to achieve the connection and disconnection of the diesel generator set and the mains power supply.

2. A building power supply and distribution system based on power demand side response according to claim 1, characterized in that: The building power supply and distribution system further comprises: a reverse power detection device; The inlet end of the mains switch is connected to the low-voltage side of the transformer, the outlet end of the mains switch is provided with a first current transformer and a second current transformer, the signal output end of the first current transformer is connected to the signal input end of the reverse power detection device, the signal output end of the reverse power detection device is connected to the power demand response management system, and the reverse power detection device outputs a reverse power signal to the power demand response management system when detecting a reverse power signal; The signal output end of the second current transformer is connected to the power connection dedicated device controller.

3. A building power supply and distribution system based on power demand side response according to claim 1, characterized in that: The power demand response management system is also used to receive the voltage signal on the mains switch power supply side in real time to detect the island signal.

4. A building power supply and distribution system based on power demand side response according to claim 1, characterized in that: When receiving the power demand side response signal, the power demand response management system controls the controllable switch to open to reduce the load or outputs a control signal to the diesel generator set controller to start the diesel generator set according to the demand response capacity output control signal.

5. A building power supply and distribution system based on power demand side response according to claim 1, characterized in that: The power connection dedicated device controller detects the voltage and frequency signals at the incoming end of the mains connection switch, and outputs a control signal to control the diesel generator set controller to adjust the voltage and frequency of the diesel generator set to synchronize with the mains power supply.

6. A building power supply and distribution system based on power demand side response according to claim 2, characterized in that: The power connection dedicated device controller obtains power quality data by detecting the voltage signal at the incoming end of the mains connection switch and the current signal of the second current transformer, and selects whether to perform power quality management according to the power demand side response operation mode.

7. A building power supply and distribution method based on power demand side response, characterized in that: The building power supply and distribution method is implemented based on the building power supply and distribution system according to any one of claims 1 to 6, and the power supply and distribution method includes: The power demand response management system receives the power demand side response signal in real time; when there is no power demand side response signal, the power supply and distribution system and the diesel generator set operate according to the conventional system; when there is a power demand side response signal: When the demand response capacity can be met by load reduction, the power demand response management system determines the load reduction loop according to the demand response capacity and the load priority order, and controls the controllable switch to open according to the corresponding output control signal; When the demand response capacity is greater than the total capacity of the interruptible load, the power demand response management system outputs a control signal to control the diesel generator set controller to start the diesel generator set, control the mains connection switch and the diesel generator power connection switch to close, and control the power connection dedicated device and the power connection dedicated device controller to participate in the power demand side response. At this time, there are two operating modes: When the power grid allows the distributed power source to be connected to the grid, the diesel generator set and the mains power supply are used in the grid-connected operation mode; When the power grid does not allow the distributed power source to be connected to the grid, the diesel generator set and the mains power supply power mutual assistance mode is adopted, or the diesel generator set island operation mode is adopted.

8. A building power supply and distribution method based on power demand side response according to claim 7, characterized in that: The building power supply and distribution method further comprises: The reverse power signal is received in real time by the power demand response management system, and the operation of the power supply and distribution system is controlled according to the operation mode agreed with the power grid: When the DGs are allowed to access the grid with reverse power during demand response, only the reverse power signal is detected; When the distributed power source is not allowed to access the grid with reverse power during the demand response period, once a reverse power signal is detected, the power demand response management system outputs a control signal within a preset time to control the mains switch to open, and the diesel generator set switches to island operation.

9. A building power supply and distribution method based on power demand side response according to claim 7, characterized in that: The building power supply and distribution method further comprises: The power demand response management system receives a fire signal in real time, and once the fire signal is received, outputs a control signal to control the diesel generator power connection switch to open, so that the diesel generator set switches to island operation; And / or, the power demand response management system detects the mains voltage signal in real time. When the mains power fails, the power demand response management system outputs a control signal to control the diesel generator power connection switch or the mains switch to open, and the diesel generator set switches to island operation.

10. A building power supply and distribution method based on power demand side response according to claim 7, characterized in that: The building power supply and distribution method further comprises: When the power demand side response signal ends, the power demand response management system outputs a control signal to control the mains connection switch and the diesel generator power connection switch to open. After a delay period, the power demand response management system outputs a control signal to control the diesel generator set controller to shut down the diesel generator set.

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