05 0 TransmissionFacilities by HC121002202410

VIEWS: 1 PAGES: 11

									Malburg Generating Station
Application for Certification                                     5.0 Transmission Facilities

                                                                                                Formatted: Bullets and Numbering



               4.05.0 FACILITY CLOSURETRANSMISSION FACILITIES

This section discusses the interconnection between the MGS and the existing Vernon
Substation. Included are a description of the existing transmission system and proposed
interconnection, and a discussion of the results of the System Impact Study (SIS).
Because no new transmission lines will be constructed as part of the MGS, there will be
no adverse impacts associated with transmission system safety or nuisance.

5.1      Existing Transmission System Description

The City’s transmission line information is presented in Table 5-1. The interconnection
work that will be done for the MGS project consists of the construction of three
underground 69 kV connections inside the existing generating station property. Two will
connect between the two new MGS CTG step-up transformers and the Vernon
Substation. The third will connect the MGS STG to the Vernon Substation. Each line
will be approximately 300 feet in length. Each line will terminate in a new 69 kV bay in
the Vernon Substation.

The existing Vernon Substation consists of seven positions, as follows:

      1. Laguna Bell-Leonis

      2. Beejay-Kinetic

      3. Vernon sub No. 1 Bank

      4. Vernon Sub No. 2 Bank

      5. Owill

      6. Container-Laguna Bell-Pulpgen

      7. Vernon sub No. 3 Bank

All 69 kV circuit segments are summarized in Table 5-1. Figure 5.1-1 shows One Line
Diagram of the Vernon Substation.

The existing transmission lines extending into the City are owned by the City inside the
City and by Edison outside the City. There are five such lines, each rated at 800 amps
continuous and 960 amps emergency. The two new CTGs will each add 376 amps and
the STG will add 481 amps.


                                                      5-1
C:\Docstoc\Working\pdf\12d0d4a1-167c-4fc7-9a74-9c2ef660c453.doc                       10/2/12
Malburg Generating Station
Application for Certification                                     5.0 Transmission Facilities

5.2      Interconnection System Impact Study

The City conducted a SIS for interconnection of the proposed MGS to the existing
Vernon Substation. This study includes the effects of the existing co-generation facilities
located within the City, the Johnson & Heinze Diesel Plant, the H. Gonzales Generating
Station, and the proposed MGS. The Vernon Substation one line diagrams for operation
and for construction (Figures 5.2-1 and 5.2-2) show the before and after configurations
at the Vernon Substation. The impedance diagram (Figure 5.2-3) shows all relevant
loads and generation sources. The SIS includes short circuit studies, power flow
analysis and transient stability studies. This section includes a summary of the results of
the City’s SIS, and an analysis of the potential system impacts for the ultimate 134 MW
of additional generation at the Vernon substation. Appendix D presents the complete
System Impact Study Report.

The SIS conducted by the City for this Project demonstrated that the five existing 800
amps, 69 kV, transmission lines are capable of supporting the 134 MW addition at the
Vernon Substation. Therefore, no new transmission facilities are required. The only
modifications required are those required at the Vernon Substation.

The results of the City’s SIS have been submitted to Edison.

         5.2.1      Study Conditions and Assumptions

The SIS was conducted by applying the City’s System Planning Criteria and Guidelines
and Cal-ISO Reliability Criteria. The SIS was based upon 2005 projected peak loading.

         5.2.2      Power Flow Analysis

The two power flow analyses were conducted based upon projected 2005 loading. One
analysis was conducted using the existing system and the second was conducted by
using the existing system plus the new MGS generation and two lines out of service.

The worst case occurs under the second condition and results in 501 A in the Vernon
Owill and Owill Leonis lines.

         5.2.3      Transient Stability Study

The stability criterion utilized is that the transmission system is to remain stable under a
three phase fault at the most critical location with the fault normally cleared and with the
loss of one or two transmission lines. This analysis was performed for five critical
contingencies based upon year 2005 system loading. All transient stability cases were
found to be stable, therefore, the report concluded that the proposed addition does not
affect stability.



                                                      5-2
C:\Docstoc\Working\pdf\12d0d4a1-167c-4fc7-9a74-9c2ef660c453.doc                       10/2/12
Malburg Generating Station
Application for Certification                                     5.0 Transmission Facilities

         5.2.4      Short Circuit Study and Facility Study

The short circuit study was conducted by simulating all generation sources on line and
all 69 kV lines in service. This represented the worst case total short circuit current.
Results of this study indicate that it is necessary to replace all 69 kV breakers at Vernon
Substation, replace all 69 kV breakers at Leonis Substation and replace all 69 kV
breakers at Owill Substation.

The City had previously initiated a 5-year program for its 69 kV breakers. The existing
breakers are over 30 years old and spare parts are difficult to obtain. The City has
accelerated its replacement program to be concurrent with development of the MGS
project.

Facility closure can be temporary or permanent. Temporary closure consists of a
cessation in operations for a period of time greater than the time required for
normal maintenance, including overhauls or replacements of major equipment.
Potential causes for temporary closure include economic conditions or repairable
damage to the plant from earthquake, fire, storm, or other such events.
Permanent closure consists of a cessation in operations with no intent to restart
operations. Potential causes for permanent closure include age of the plant, economic
conditions, or irreparable damage to the plant. Temporary and permanent facility
closures are discussed in the following sections.



                                                                                                Formatted: Bullets and Numbering
4.1TEMPORARY CLOSURE



In the event of a temporary closure, 24-hour security for the facility will be maintained
and the CEC will be notified. Actions taken will depend on whether the temporary
closure involves a release of hazardous materials.



If there is no release or threatened release of hazardous materials, a contingency plan
for the temporary cessation of operations will be implemented. The contingency
plan will be conducted to ensure public health and safety, protection of the
environment, and conformance with all applicable laws, ordinances, regulations,
and standards.          Appropriate procedures will depend on the expected
duration of the shutdown. Accordingly, the contingency plan may include the
draining of chemicals, water, and other fluids from storage tanks and plant equipment
and various other procedures to ensure worker safety and to protect plant equipment.



                                                      5-3
C:\Docstoc\Working\pdf\12d0d4a1-167c-4fc7-9a74-9c2ef660c453.doc                       10/2/12
Malburg Generating Station
Application for Certification                                     5.0 Transmission Facilities

All hazardous and non-hazardous waste materials will be collected and disposed of as
described in Section 8.12.



If there is a release or threatened release of hazardous materials,
procedures set forth in a Risk Management Plan (RMP) will be implemented.
The RMP to be prepared is described in Section 8.12. Procedures include
methods     to    control  releases      of   hazardous    materials,   notification of
appropriate authorities and the public, training for plant personnel, and other
emergency response actions and preparation.           Once the release of hazardous
materials has been contained and cleaned up, temporary closure will proceed as in
the case of a closure where there is no release of hazardous materials.




                                                      5-4
C:\Docstoc\Working\pdf\12d0d4a1-167c-4fc7-9a74-9c2ef660c453.doc                       10/2/12
Malburg Generating Station
Application for Certification                                     5.0 Transmission Facilities




                                                                                                Formatted: Bullets and Numbering
4.2PERMANENT CLOSURE



The planned operational life of the facility is 30 years. However, if the facility
continues to be economically viable, it could be operated for a longer period of time.
Operation beyond 30 years would defer environmental impacts resulting from the
construction of replacement facilities. It is also possible    that the facility could
become economically non-competitive before 30 years have transpired, forcing
early decommissioning. Whether the facility is closed at the expiration of 30 years, after
more than 30 years, or prior to 30 years due to economic or other reasons, procedures
set forth in a decommissioning     plan will be implemented. The decommissioning plan
to be prepared is described below.



To ensure public health and safety, protection of the environment, and conformance with
applicable laws, ordinances, regulations, and standards, the decommissioning plan will
be submitted to the CEC for review        prior to commencement of permanent
facility closure measures.          Such measures may range from extensive
“mothballing” to removal of all equipment and appurtenances, depending on
circumstances at the time.          However, future conditions that would affect
decommissioning decisions are largely unknown at this time.             It is therefore
appropriate to present decommissioning details to the CEC and other jurisdictional
agencies when more information is available and the time for permanent facility closure
has drawn closer.



The decommissioning plan will include the following:



Description of the proposed decommissioning measures for the facility and
                                                                                                Formatted: Bullets and Numbering
  for all appurtenances constructed as part of the facility.



                                                                                                Formatted: Bullets and Numbering
  Description of the activities necessary to restore the site if the decommissioning
plan calls for removal of all equipment and appurtenances.



                                                      5-5
C:\Docstoc\Working\pdf\12d0d4a1-167c-4fc7-9a74-9c2ef660c453.doc                       10/2/12
Malburg Generating Station
Application for Certification                                      5.0 Transmission Facilities
                                                                                                 Formatted: Bullets and Numbering
         Discussion of decommissioning alternatives other than restoration of the site.



Presentation of the costs associated with the proposed decommissioning measures and
the
                                                                                                 Formatted: Bullets and Numbering
  source of funds to pay for the decommissioning.



                                                                                                 Formatted: Bullets and Numbering
  Discussion of conformance with applicable laws, ordinances, regulations, and
standards and with local and regional plans.



In general, the proposed decommissioning measures will attempt to maximize the
recycling of all facility components. Unused chemicals will be sold back to the suppliers
or other purchasers where practicable.     All equipment will be shut down and drained
so as to ensure public health and safety and protection of the environment.            All
hazardous and non-hazardous waste materials will be collected and disposed of
as described in Section 3.4.7. Until decommissioning activities have been completed,
24-hour        security       for     the      facility    will     be        maintained.




                                                      5-6
C:\Docstoc\Working\pdf\12d0d4a1-167c-4fc7-9a74-9c2ef660c453.doc                        10/2/12
Malburg Generating Station
Application for Certification                                              5.0 Transmission Facilities


                                          Table 5-1
                        City of Vernon Transmission Line Information

                                           Line                   Continuous
      From                To                            Voltage                      Conductor
                                          Length                     Rating
    Substation         Substation                        (kV)                          Size
                                          (Miles)                   (Amps)
                                                                           a
Laguna Bell           Vernon /               5.2            69       800          653.9 ACSR
                      Pulpgen

                                                                           a
Laguna Bell           Ybarra                 4.7            69       800          653.9 ACSR

                                                                           a
Ybarra                Leonis                0.96            69       800          653.9 ACSR

                                                                           a
Laguna Bell           Leonis /              4.99            69       800          653.9 ACSR
                      Vernon

                                                                           a
Laguna Bell           Leonis /               4.8            69       800          653.9 ACSR
                      Coldgen

                                                                           a
Laguna Bell           Leonis /               5.3            69       800          653.9 ACSR
                      Growgen

                                                                           a
Leonis                Owill                 0.58            69       800          653.9 ACSR /
                                                                                  1750MCM

                                                                           a
Owill                 Vernon                0.19            69       800          653.9 ACSR

                                                                           a
Leonis                Vernon                0.80            69       800          653.9 ACSR

a        960 A emergency rating




                                                      5-7
C:\Docstoc\Working\pdf\12d0d4a1-167c-4fc7-9a74-9c2ef660c453.doc                                10/2/12
Malburg Generating Station
Application for Certification                                           5.0 Transmission Facilities




                                                                  5-8
C:\Docstoc\Working\pdf\12d0d4a1-167c-4fc7-9a74-9c2ef660c453.doc                             10/2/12
Malburg Generating Station
Application for Certification                                           5.0 Transmission Facilities




                                                                  5-9
C:\Docstoc\Working\pdf\12d0d4a1-167c-4fc7-9a74-9c2ef660c453.doc                             10/2/12
Malburg Generating Station
Application for Certification                                            5.0 Transmission Facilities




                                                                  5-10
C:\Docstoc\Working\pdf\12d0d4a1-167c-4fc7-9a74-9c2ef660c453.doc                              10/2/12
Malburg Generating Station
Application for Certification                                            5.0 Transmission Facilities




                                                                  5-11
C:\Docstoc\Working\pdf\12d0d4a1-167c-4fc7-9a74-9c2ef660c453.doc                              10/2/12

								
To top